text: /* vi:set ts=8 sts=4 sw=4:
   *
   * VIM - Vi IMproved	by Bram Moolenaar
   *
   * Do ":help uganda"  in Vim to read copying and usage conditions.
   * Do ":help credits" in Vim to see a list of people who contributed.
   * See README.txt for an overview of the Vim source code.
   */
  
  /*
   * eval.c: Expression evaluation.
   */
  
  #include "vim.h"
  
  #if defined(FEAT_EVAL) || defined(PROTO)
  
  #ifdef AMIGA
  # include <time.h>	/* for strftime() */
  #endif
  
  #ifdef VMS
  # include <float.h>
  #endif
  
  #ifdef MACOS
  # include <time.h>	/* for time_t */
  #endif
  
  #if defined(FEAT_FLOAT) && defined(HAVE_MATH_H)
  # include <math.h>
  #endif
  
  #define DICT_MAXNEST 100	/* maximum nesting of lists and dicts */
  
  #define DO_NOT_FREE_CNT 99999	/* refcount for dict or list that should not
  				   be freed. */
  
  /*
   * In a hashtab item "hi_key" points to "di_key" in a dictitem.
   * This avoids adding a pointer to the hashtab item.
   * DI2HIKEY() converts a dictitem pointer to a hashitem key pointer.
   * HIKEY2DI() converts a hashitem key pointer to a dictitem pointer.
   * HI2DI() converts a hashitem pointer to a dictitem pointer.
   */
  static dictitem_T dumdi;
  #define DI2HIKEY(di) ((di)->di_key)
  #define HIKEY2DI(p)  ((dictitem_T *)(p - (dumdi.di_key - (char_u *)&dumdi)))
  #define HI2DI(hi)     HIKEY2DI((hi)->hi_key)
  
  /*
   * Structure returned by get_lval() and used by set_var_lval().
   * For a plain name:
   *	"name"	    points to the variable name.
   *	"exp_name"  is NULL.
   *	"tv"	    is NULL
   * For a magic braces name:
   *	"name"	    points to the expanded variable name.
   *	"exp_name"  is non-NULL, to be freed later.
   *	"tv"	    is NULL
   * For an index in a list:
   *	"name"	    points to the (expanded) variable name.
   *	"exp_name"  NULL or non-NULL, to be freed later.
   *	"tv"	    points to the (first) list item value
   *	"li"	    points to the (first) list item
   *	"range", "n1", "n2" and "empty2" indicate what items are used.
   * For an existing Dict item:
   *	"name"	    points to the (expanded) variable name.
   *	"exp_name"  NULL or non-NULL, to be freed later.
   *	"tv"	    points to the dict item value
   *	"newkey"    is NULL
   * For a non-existing Dict item:
   *	"name"	    points to the (expanded) variable name.
   *	"exp_name"  NULL or non-NULL, to be freed later.
   *	"tv"	    points to the Dictionary typval_T
   *	"newkey"    is the key for the new item.
   */
  typedef struct lval_S
  {
      char_u	*ll_name;	/* start of variable name (can be NULL) */
      char_u	*ll_exp_name;	/* NULL or expanded name in allocated memory. */
      typval_T	*ll_tv;		/* Typeval of item being used.  If "newkey"
  				   isn't NULL it's the Dict to which to add
  				   the item. */
      listitem_T	*ll_li;		/* The list item or NULL. */
      list_T	*ll_list;	/* The list or NULL. */
      int		ll_range;	/* TRUE when a [i:j] range was used */
      long	ll_n1;		/* First index for list */
      long	ll_n2;		/* Second index for list range */
      int		ll_empty2;	/* Second index is empty: [i:] */
      dict_T	*ll_dict;	/* The Dictionary or NULL */
      dictitem_T	*ll_di;		/* The dictitem or NULL */
      char_u	*ll_newkey;	/* New key for Dict in alloc. mem or NULL. */
  } lval_T;
  
  static char *e_letunexp	= N_("E18: Unexpected characters in :let");
  static char *e_listidx = N_("E684: list index out of range: %ld");
  static char *e_undefvar = N_("E121: Undefined variable: %s");
  static char *e_missbrac = N_("E111: Missing ']'");
  static char *e_listarg = N_("E686: Argument of %s must be a List");
  static char *e_listdictarg = N_("E712: Argument of %s must be a List or Dictionary");
  static char *e_emptykey = N_("E713: Cannot use empty key for Dictionary");
  static char *e_listreq = N_("E714: List required");
  static char *e_dictreq = N_("E715: Dictionary required");
  static char *e_toomanyarg = N_("E118: Too many arguments for function: %s");
  static char *e_dictkey = N_("E716: Key not present in Dictionary: %s");
  static char *e_funcexts = N_("E122: Function %s already exists, add ! to replace it");
  static char *e_funcdict = N_("E717: Dictionary entry already exists");
  static char *e_funcref = N_("E718: Funcref required");
  static char *e_dictrange = N_("E719: Cannot use [:] with a Dictionary");
  static char *e_letwrong = N_("E734: Wrong variable type for %s=");
  static char *e_nofunc = N_("E130: Unknown function: %s");
  static char *e_illvar = N_("E461: Illegal variable name: %s");
  #ifdef FEAT_FLOAT
  static char *e_float_as_string = N_("E806: using Float as a String");
  #endif
  
  static dictitem_T	globvars_var;		/* variable used for g: */
  #define globvarht globvardict.dv_hashtab
  
  /*
   * Old Vim variables such as "v:version" are also available without the "v:".
   * Also in functions.  We need a special hashtable for them.
   */
  static hashtab_T	compat_hashtab;
  
  /*
   * When recursively copying lists and dicts we need to remember which ones we
   * have done to avoid endless recursiveness.  This unique ID is used for that.
   * The last bit is used for previous_funccal, ignored when comparing.
   */
  static int current_copyID = 0;
  #define COPYID_INC 2
  #define COPYID_MASK (~0x1)
  
  /* Abort conversion to string after a recursion error. */
  static int  did_echo_string_emsg = FALSE;
  
  /*
   * Array to hold the hashtab with variables local to each sourced script.
   * Each item holds a variable (nameless) that points to the dict_T.
   */
  typedef struct
  {
      dictitem_T	sv_var;
      dict_T	sv_dict;
  } scriptvar_T;
  
  static garray_T	    ga_scripts = {0, 0, sizeof(scriptvar_T *), 4, NULL};
  #define SCRIPT_SV(id) (((scriptvar_T **)ga_scripts.ga_data)[(id) - 1])
  #define SCRIPT_VARS(id) (SCRIPT_SV(id)->sv_dict.dv_hashtab)
  
  static int echo_attr = 0;   /* attributes used for ":echo" */
  
  /* Values for trans_function_name() argument: */
  #define TFN_INT		1	/* internal function name OK */
  #define TFN_QUIET	2	/* no error messages */
  #define TFN_NO_AUTOLOAD	4	/* do not use script autoloading */
  
  /* Values for get_lval() flags argument: */
  #define GLV_QUIET	TFN_QUIET	/* no error messages */
  #define GLV_NO_AUTOLOAD	TFN_NO_AUTOLOAD	/* do not use script autoloading */
  
  /*
   * Structure to hold info for a user function.
   */
  typedef struct ufunc ufunc_T;
  
  struct ufunc
  {
      int		uf_varargs;	/* variable nr of arguments */
      int		uf_flags;
      int		uf_calls;	/* nr of active calls */
      garray_T	uf_args;	/* arguments */
      garray_T	uf_lines;	/* function lines */
  #ifdef FEAT_PROFILE
      int		uf_profiling;	/* TRUE when func is being profiled */
      /* profiling the function as a whole */
      int		uf_tm_count;	/* nr of calls */
      proftime_T	uf_tm_total;	/* time spent in function + children */
      proftime_T	uf_tm_self;	/* time spent in function itself */
      proftime_T	uf_tm_children;	/* time spent in children this call */
      /* profiling the function per line */
      int		*uf_tml_count;	/* nr of times line was executed */
      proftime_T	*uf_tml_total;	/* time spent in a line + children */
      proftime_T	*uf_tml_self;	/* time spent in a line itself */
      proftime_T	uf_tml_start;	/* start time for current line */
      proftime_T	uf_tml_children; /* time spent in children for this line */
      proftime_T	uf_tml_wait;	/* start wait time for current line */
      int		uf_tml_idx;	/* index of line being timed; -1 if none */
      int		uf_tml_execed;	/* line being timed was executed */
  #endif
      scid_T	uf_script_ID;	/* ID of script where function was defined,
  				   used for s: variables */
      int		uf_refcount;	/* for numbered function: reference count */
      char_u	uf_name[1];	/* name of function (actually longer); can
  				   start with <SNR>123_ (<SNR> is K_SPECIAL
  				   KS_EXTRA KE_SNR) */
  };
  
  /* function flags */
  #define FC_ABORT    1		/* abort function on error */
  #define FC_RANGE    2		/* function accepts range */
  #define FC_DICT	    4		/* Dict function, uses "self" */
  
  /*
   * All user-defined functions are found in this hashtable.
   */
  static hashtab_T	func_hashtab;
  
  /* The names of packages that once were loaded are remembered. */
  static garray_T		ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
  
  /* list heads for garbage collection */
  static dict_T		*first_dict = NULL;	/* list of all dicts */
  static list_T		*first_list = NULL;	/* list of all lists */
  
  /* From user function to hashitem and back. */
  static ufunc_T dumuf;
  #define UF2HIKEY(fp) ((fp)->uf_name)
  #define HIKEY2UF(p)  ((ufunc_T *)(p - (dumuf.uf_name - (char_u *)&dumuf)))
  #define HI2UF(hi)     HIKEY2UF((hi)->hi_key)
  
  #define FUNCARG(fp, j)	((char_u **)(fp->uf_args.ga_data))[j]
  #define FUNCLINE(fp, j)	((char_u **)(fp->uf_lines.ga_data))[j]
  
  #define MAX_FUNC_ARGS	20	/* maximum number of function arguments */
  #define VAR_SHORT_LEN	20	/* short variable name length */
  #define FIXVAR_CNT	12	/* number of fixed variables */
  
  /* structure to hold info for a function that is currently being executed. */
  typedef struct funccall_S funccall_T;
  
  struct funccall_S
  {
      ufunc_T	*func;		/* function being called */
      int		linenr;		/* next line to be executed */
      int		returned;	/* ":return" used */
      struct			/* fixed variables for arguments */
      {
  	dictitem_T	var;		/* variable (without room for name) */
  	char_u	room[VAR_SHORT_LEN];	/* room for the name */
      } fixvar[FIXVAR_CNT];
      dict_T	l_vars;		/* l: local function variables */
      dictitem_T	l_vars_var;	/* variable for l: scope */
      dict_T	l_avars;	/* a: argument variables */
      dictitem_T	l_avars_var;	/* variable for a: scope */
      list_T	l_varlist;	/* list for a:000 */
      listitem_T	l_listitems[MAX_FUNC_ARGS];	/* listitems for a:000 */
      typval_T	*rettv;		/* return value */
      linenr_T	breakpoint;	/* next line with breakpoint or zero */
      int		dbg_tick;	/* debug_tick when breakpoint was set */
      int		level;		/* top nesting level of executed function */
  #ifdef FEAT_PROFILE
      proftime_T	prof_child;	/* time spent in a child */
  #endif
      funccall_T	*caller;	/* calling function or NULL */
  };
  
  /*
   * Info used by a ":for" loop.
   */
  typedef struct
  {
      int		fi_semicolon;	/* TRUE if ending in '; var]' */
      int		fi_varcount;	/* nr of variables in the list */
      listwatch_T	fi_lw;		/* keep an eye on the item used. */
      list_T	*fi_list;	/* list being used */
  } forinfo_T;
  
  /*
   * Struct used by trans_function_name()
   */
  typedef struct
  {
      dict_T	*fd_dict;	/* Dictionary used */
      char_u	*fd_newkey;	/* new key in "dict" in allocated memory */
      dictitem_T	*fd_di;		/* Dictionary item used */
  } funcdict_T;
  
  
  /*
   * Array to hold the value of v: variables.
   * The value is in a dictitem, so that it can also be used in the v: scope.
   * The reason to use this table anyway is for very quick access to the
   * variables with the VV_ defines.
   */
  #include "version.h"
  
  /* values for vv_flags: */
  #define VV_COMPAT	1	/* compatible, also used without "v:" */
  #define VV_RO		2	/* read-only */
  #define VV_RO_SBX	4	/* read-only in the sandbox */
  
  #define VV_NAME(s, t)	s, {{t, 0, {0}}, 0, {0}}, {0}
  
  static struct vimvar
  {
      char	*vv_name;	/* name of variable, without v: */
      dictitem_T	vv_di;		/* value and name for key */
      char	vv_filler[16];	/* space for LONGEST name below!!! */
      char	vv_flags;	/* VV_COMPAT, VV_RO, VV_RO_SBX */
  } vimvars[VV_LEN] =
  {
      /*
       * The order here must match the VV_ defines in vim.h!
       * Initializing a union does not work, leave tv.vval empty to get zero's.
       */
      {VV_NAME("count",		 VAR_NUMBER), VV_COMPAT+VV_RO},
      {VV_NAME("count1",		 VAR_NUMBER), VV_RO},
      {VV_NAME("prevcount",	 VAR_NUMBER), VV_RO},
      {VV_NAME("errmsg",		 VAR_STRING), VV_COMPAT},
      {VV_NAME("warningmsg",	 VAR_STRING), 0},
      {VV_NAME("statusmsg",	 VAR_STRING), 0},
      {VV_NAME("shell_error",	 VAR_NUMBER), VV_COMPAT+VV_RO},
      {VV_NAME("this_session",	 VAR_STRING), VV_COMPAT},
      {VV_NAME("version",		 VAR_NUMBER), VV_COMPAT+VV_RO},
      {VV_NAME("lnum",		 VAR_NUMBER), VV_RO_SBX},
      {VV_NAME("termresponse",	 VAR_STRING), VV_RO},
      {VV_NAME("fname",		 VAR_STRING), VV_RO},
      {VV_NAME("lang",		 VAR_STRING), VV_RO},
      {VV_NAME("lc_time",		 VAR_STRING), VV_RO},
      {VV_NAME("ctype",		 VAR_STRING), VV_RO},
      {VV_NAME("charconvert_from", VAR_STRING), VV_RO},
      {VV_NAME("charconvert_to",	 VAR_STRING), VV_RO},
      {VV_NAME("fname_in",	 VAR_STRING), VV_RO},
      {VV_NAME("fname_out",	 VAR_STRING), VV_RO},
      {VV_NAME("fname_new",	 VAR_STRING), VV_RO},
      {VV_NAME("fname_diff",	 VAR_STRING), VV_RO},
      {VV_NAME("cmdarg",		 VAR_STRING), VV_RO},
      {VV_NAME("foldstart",	 VAR_NUMBER), VV_RO_SBX},
      {VV_NAME("foldend",		 VAR_NUMBER), VV_RO_SBX},
      {VV_NAME("folddashes",	 VAR_STRING), VV_RO_SBX},
      {VV_NAME("foldlevel",	 VAR_NUMBER), VV_RO_SBX},
      {VV_NAME("progname",	 VAR_STRING), VV_RO},
      {VV_NAME("servername",	 VAR_STRING), VV_RO},
      {VV_NAME("dying",		 VAR_NUMBER), VV_RO},
      {VV_NAME("exception",	 VAR_STRING), VV_RO},
      {VV_NAME("throwpoint",	 VAR_STRING), VV_RO},
      {VV_NAME("register",	 VAR_STRING), VV_RO},
      {VV_NAME("cmdbang",		 VAR_NUMBER), VV_RO},
      {VV_NAME("insertmode",	 VAR_STRING), VV_RO},
      {VV_NAME("val",		 VAR_UNKNOWN), VV_RO},
      {VV_NAME("key",		 VAR_UNKNOWN), VV_RO},
      {VV_NAME("profiling",	 VAR_NUMBER), VV_RO},
      {VV_NAME("fcs_reason",	 VAR_STRING), VV_RO},
      {VV_NAME("fcs_choice",	 VAR_STRING), 0},
      {VV_NAME("beval_bufnr",	 VAR_NUMBER), VV_RO},
      {VV_NAME("beval_winnr",	 VAR_NUMBER), VV_RO},
      {VV_NAME("beval_lnum",	 VAR_NUMBER), VV_RO},
      {VV_NAME("beval_col",	 VAR_NUMBER), VV_RO},
      {VV_NAME("beval_text",	 VAR_STRING), VV_RO},
      {VV_NAME("scrollstart",	 VAR_STRING), 0},
      {VV_NAME("swapname",	 VAR_STRING), VV_RO},
      {VV_NAME("swapchoice",	 VAR_STRING), 0},
      {VV_NAME("swapcommand",	 VAR_STRING), VV_RO},
      {VV_NAME("char",		 VAR_STRING), 0},
      {VV_NAME("mouse_win",	 VAR_NUMBER), 0},
      {VV_NAME("mouse_lnum",	 VAR_NUMBER), 0},
      {VV_NAME("mouse_col",	 VAR_NUMBER), 0},
      {VV_NAME("operator",	 VAR_STRING), VV_RO},
      {VV_NAME("searchforward",	 VAR_NUMBER), 0},
      {VV_NAME("hlsearch",	 VAR_NUMBER), 0},
      {VV_NAME("oldfiles",	 VAR_LIST), 0},
      {VV_NAME("windowid",	 VAR_NUMBER), VV_RO},
      {VV_NAME("progpath",	 VAR_STRING), VV_RO},
      {VV_NAME("completed_item",	 VAR_DICT), VV_RO},
      {VV_NAME("option_new",	 VAR_STRING), VV_RO},
      {VV_NAME("option_old",	 VAR_STRING), VV_RO},
      {VV_NAME("option_type",	 VAR_STRING), VV_RO},
  };
  
  /* shorthand */
  #define vv_type		vv_di.di_tv.v_type
  #define vv_nr		vv_di.di_tv.vval.v_number
  #define vv_float	vv_di.di_tv.vval.v_float
  #define vv_str		vv_di.di_tv.vval.v_string
  #define vv_list		vv_di.di_tv.vval.v_list
  #define vv_dict		vv_di.di_tv.vval.v_dict
  #define vv_tv		vv_di.di_tv
  
  static dictitem_T	vimvars_var;		/* variable used for v: */
  #define vimvarht  vimvardict.dv_hashtab
  
  static void prepare_vimvar __ARGS((int idx, typval_T *save_tv));
  static void restore_vimvar __ARGS((int idx, typval_T *save_tv));
  static int ex_let_vars __ARGS((char_u *arg, typval_T *tv, int copy, int semicolon, int var_count, char_u *nextchars));
  static char_u *skip_var_list __ARGS((char_u *arg, int *var_count, int *semicolon));
  static char_u *skip_var_one __ARGS((char_u *arg));
  static void list_hashtable_vars __ARGS((hashtab_T *ht, char_u *prefix, int empty, int *first));
  static void list_glob_vars __ARGS((int *first));
  static void list_buf_vars __ARGS((int *first));
  static void list_win_vars __ARGS((int *first));
  #ifdef FEAT_WINDOWS
  static void list_tab_vars __ARGS((int *first));
  #endif
  static void list_vim_vars __ARGS((int *first));
  static void list_script_vars __ARGS((int *first));
  static void list_func_vars __ARGS((int *first));
  static char_u *list_arg_vars __ARGS((exarg_T *eap, char_u *arg, int *first));
  static char_u *ex_let_one __ARGS((char_u *arg, typval_T *tv, int copy, char_u *endchars, char_u *op));
  static int check_changedtick __ARGS((char_u *arg));
  static char_u *get_lval __ARGS((char_u *name, typval_T *rettv, lval_T *lp, int unlet, int skip, int flags, int fne_flags));
  static void clear_lval __ARGS((lval_T *lp));
  static void set_var_lval __ARGS((lval_T *lp, char_u *endp, typval_T *rettv, int copy, char_u *op));
  static int tv_op __ARGS((typval_T *tv1, typval_T *tv2, char_u  *op));
  static void list_fix_watch __ARGS((list_T *l, listitem_T *item));
  static void ex_unletlock __ARGS((exarg_T *eap, char_u *argstart, int deep));
  static int do_unlet_var __ARGS((lval_T *lp, char_u *name_end, int forceit));
  static int do_lock_var __ARGS((lval_T *lp, char_u *name_end, int deep, int lock));
  static void item_lock __ARGS((typval_T *tv, int deep, int lock));
  static int tv_islocked __ARGS((typval_T *tv));
  
  static int eval0 __ARGS((char_u *arg,  typval_T *rettv, char_u **nextcmd, int evaluate));
  static int eval1 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static int eval2 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static int eval3 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static int eval4 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static int eval5 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static int eval6 __ARGS((char_u **arg, typval_T *rettv, int evaluate, int want_string));
  static int eval7 __ARGS((char_u **arg, typval_T *rettv, int evaluate, int want_string));
  
  static int eval_index __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
  static int get_option_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static int get_string_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static int get_lit_string_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static int get_list_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static int rettv_list_alloc __ARGS((typval_T *rettv));
  static long list_len __ARGS((list_T *l));
  static int list_equal __ARGS((list_T *l1, list_T *l2, int ic, int recursive));
  static int dict_equal __ARGS((dict_T *d1, dict_T *d2, int ic, int recursive));
  static int tv_equal __ARGS((typval_T *tv1, typval_T *tv2, int ic, int recursive));
  static long list_find_nr __ARGS((list_T *l, long idx, int *errorp));
  static long list_idx_of_item __ARGS((list_T *l, listitem_T *item));
  static int list_append_number __ARGS((list_T *l, varnumber_T n));
  static int list_extend __ARGS((list_T	*l1, list_T *l2, listitem_T *bef));
  static int list_concat __ARGS((list_T *l1, list_T *l2, typval_T *tv));
  static list_T *list_copy __ARGS((list_T *orig, int deep, int copyID));
  static char_u *list2string __ARGS((typval_T *tv, int copyID));
  static int list_join_inner __ARGS((garray_T *gap, list_T *l, char_u *sep, int echo_style, int copyID, garray_T *join_gap));
  static int list_join __ARGS((garray_T *gap, list_T *l, char_u *sep, int echo, int copyID));
  static int free_unref_items __ARGS((int copyID));
  static int rettv_dict_alloc __ARGS((typval_T *rettv));
  static dictitem_T *dictitem_copy __ARGS((dictitem_T *org));
  static void dictitem_remove __ARGS((dict_T *dict, dictitem_T *item));
  static dict_T *dict_copy __ARGS((dict_T *orig, int deep, int copyID));
  static long dict_len __ARGS((dict_T *d));
  static char_u *dict2string __ARGS((typval_T *tv, int copyID));
  static int get_dict_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static char_u *echo_string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf, int copyID));
  static char_u *tv2string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf, int copyID));
  static char_u *string_quote __ARGS((char_u *str, int function));
  #ifdef FEAT_FLOAT
  static int string2float __ARGS((char_u *text, float_T *value));
  #endif
  static int get_env_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
  static int find_internal_func __ARGS((char_u *name));
  static char_u *deref_func_name __ARGS((char_u *name, int *lenp, int no_autoload));
  static int get_func_tv __ARGS((char_u *name, int len, typval_T *rettv, char_u **arg, linenr_T firstline, linenr_T lastline, int *doesrange, int evaluate, dict_T *selfdict));
  static int call_func __ARGS((char_u *funcname, int len, typval_T *rettv, int argcount, typval_T *argvars, linenr_T firstline, linenr_T lastline, int *doesrange, int evaluate, dict_T *selfdict));
  static void emsg_funcname __ARGS((char *ermsg, char_u *name));
  static int non_zero_arg __ARGS((typval_T *argvars));
  
  #ifdef FEAT_FLOAT
  static void f_abs __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_acos __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_add __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_and __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_append __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_argc __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_argidx __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_arglistid __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_argv __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_asin __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_atan __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_atan2 __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_browse __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_browsedir __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_bufexists __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_buflisted __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_bufloaded __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_bufname __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_bufnr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_bufwinnr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_byte2line __ARGS((typval_T *argvars, typval_T *rettv));
  static void byteidx __ARGS((typval_T *argvars, typval_T *rettv, int comp));
  static void f_byteidx __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_byteidxcomp __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_call __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_ceil __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_changenr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_char2nr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_cindent __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_clearmatches __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_col __ARGS((typval_T *argvars, typval_T *rettv));
  #if defined(FEAT_INS_EXPAND)
  static void f_complete __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_complete_add __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_complete_check __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_confirm __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_copy __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_cos __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_cosh __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_count __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_cscope_connection __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_cursor __ARGS((typval_T *argsvars, typval_T *rettv));
  static void f_deepcopy __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_delete __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_did_filetype __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_diff_filler __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_diff_hlID __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_empty __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_escape __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_eval __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_eventhandler __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_executable __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_exepath __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_exists __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_exp __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_expand __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_extend __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_feedkeys __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_filereadable __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_filewritable __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_filter __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_finddir __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_findfile __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_float2nr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_floor __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_fmod __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_fnameescape __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_fnamemodify __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_foldclosed __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_foldclosedend __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_foldlevel __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_foldtext __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_foldtextresult __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_foreground __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_function __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_garbagecollect __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_get __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getbufline __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getbufvar __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getchar __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getcharmod __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getcmdline __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getcmdtype __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getcmdwintype __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getcwd __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getfontname __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getfperm __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getfsize __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getftime __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getftype __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getline __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getmatches __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getpid __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getcurpos __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getpos __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getqflist __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getreg __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getregtype __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_gettabvar __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_gettabwinvar __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getwinposx __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getwinposy __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_getwinvar __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_glob __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_globpath __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_glob2regpat  __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_has __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_has_key __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_haslocaldir __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_hasmapto __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_histadd __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_histdel __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_histget __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_histnr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_hlID __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_hlexists __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_hostname __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_iconv __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_indent __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_index __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_input __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_inputdialog __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_inputlist __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_inputrestore __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_inputsave __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_inputsecret __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_insert __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_invert __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_isdirectory __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_islocked __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_items __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_join __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_keys __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_last_buffer_nr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_len __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_libcall __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_libcallnr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_line __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_line2byte __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_lispindent __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_localtime __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_log __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_log10 __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  #ifdef FEAT_LUA
  static void f_luaeval __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_map __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_maparg __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_mapcheck __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_match __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_matchadd __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_matchaddpos __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_matcharg __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_matchdelete __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_matchend __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_matchlist __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_matchstr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_max __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_min __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef vim_mkdir
  static void f_mkdir __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_mode __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_MZSCHEME
  static void f_mzeval __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_nextnonblank __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_nr2char __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_or __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_pathshorten __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_pow __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_prevnonblank __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_printf __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_pumvisible __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_PYTHON3
  static void f_py3eval __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  #ifdef FEAT_PYTHON
  static void f_pyeval __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_range __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_readfile __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_reltime __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_reltimestr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_remote_expr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_remote_foreground __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_remote_peek __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_remote_read __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_remote_send __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_remove __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_rename __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_repeat __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_resolve __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_reverse __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_round __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_screenattr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_screenchar __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_screencol __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_screenrow __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_search __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_searchdecl __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_searchpair __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_searchpairpos __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_searchpos __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_server2client __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_serverlist __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_setbufvar __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_setcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_setline __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_setloclist __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_setmatches __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_setpos __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_setqflist __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_setreg __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_settabvar __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_settabwinvar __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_setwinvar __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_CRYPT
  static void f_sha256 __ARGS((typval_T *argvars, typval_T *rettv));
  #endif /* FEAT_CRYPT */
  static void f_shellescape __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_shiftwidth __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_simplify __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_sin __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_sinh __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_sort __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_soundfold __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_spellbadword __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_spellsuggest __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_split __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_sqrt __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_str2float __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_str2nr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_strchars __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef HAVE_STRFTIME
  static void f_strftime __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_stridx __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_string __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_strlen __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_strpart __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_strridx __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_strtrans __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_strdisplaywidth __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_strwidth __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_submatch __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_substitute __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_synID __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_synIDattr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_synIDtrans __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_synstack __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_synconcealed __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_system __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_systemlist __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_tabpagebuflist __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_tabpagenr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_tabpagewinnr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_taglist __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_tagfiles __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_tempname __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_test __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_tan __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_tanh __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_tolower __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_toupper __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_tr __ARGS((typval_T *argvars, typval_T *rettv));
  #ifdef FEAT_FLOAT
  static void f_trunc __ARGS((typval_T *argvars, typval_T *rettv));
  #endif
  static void f_type __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_undofile __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_undotree __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_uniq __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_values __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_virtcol __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_visualmode __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_wildmenumode __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_winbufnr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_wincol __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_winheight __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_winline __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_winnr __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_winrestcmd __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_winrestview __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_winsaveview __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_winwidth __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_writefile __ARGS((typval_T *argvars, typval_T *rettv));
  static void f_xor __ARGS((typval_T *argvars, typval_T *rettv));
  
  static int list2fpos __ARGS((typval_T *arg, pos_T *posp, int *fnump, colnr_T *curswantp));
  static pos_T *var2fpos __ARGS((typval_T *varp, int dollar_lnum, int *fnum));
  static int get_env_len __ARGS((char_u **arg));
  static int get_id_len __ARGS((char_u **arg));
  static int get_name_len __ARGS((char_u **arg, char_u **alias, int evaluate, int verbose));
  static char_u *find_name_end __ARGS((char_u *arg, char_u **expr_start, char_u **expr_end, int flags));
  #define FNE_INCL_BR	1	/* find_name_end(): include [] in name */
  #define FNE_CHECK_START	2	/* find_name_end(): check name starts with
  				   valid character */
  static char_u * make_expanded_name __ARGS((char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end));
  static int eval_isnamec __ARGS((int c));
  static int eval_isnamec1 __ARGS((int c));
  static int get_var_tv __ARGS((char_u *name, int len, typval_T *rettv, dictitem_T **dip, int verbose, int no_autoload));
  static int handle_subscript __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
  static typval_T *alloc_tv __ARGS((void));
  static typval_T *alloc_string_tv __ARGS((char_u *string));
  static void init_tv __ARGS((typval_T *varp));
  static long get_tv_number __ARGS((typval_T *varp));
  static linenr_T get_tv_lnum __ARGS((typval_T *argvars));
  static linenr_T get_tv_lnum_buf __ARGS((typval_T *argvars, buf_T *buf));
  static char_u *get_tv_string __ARGS((typval_T *varp));
  static char_u *get_tv_string_buf __ARGS((typval_T *varp, char_u *buf));
  static char_u *get_tv_string_buf_chk __ARGS((typval_T *varp, char_u *buf));
  static dictitem_T *find_var __ARGS((char_u *name, hashtab_T **htp, int no_autoload));
  static dictitem_T *find_var_in_ht __ARGS((hashtab_T *ht, int htname, char_u *varname, int no_autoload));
  static hashtab_T *find_var_ht __ARGS((char_u *name, char_u **varname));
  static void vars_clear_ext __ARGS((hashtab_T *ht, int free_val));
  static void delete_var __ARGS((hashtab_T *ht, hashitem_T *hi));
  static void list_one_var __ARGS((dictitem_T *v, char_u *prefix, int *first));
  static void list_one_var_a __ARGS((char_u *prefix, char_u *name, int type, char_u *string, int *first));
  static void set_var __ARGS((char_u *name, typval_T *varp, int copy));
  static int var_check_ro __ARGS((int flags, char_u *name, int use_gettext));
  static int var_check_fixed __ARGS((int flags, char_u *name, int use_gettext));
  static int var_check_func_name __ARGS((char_u *name, int new_var));
  static int valid_varname __ARGS((char_u *varname));
  static int tv_check_lock __ARGS((int lock, char_u *name, int use_gettext));
  static int item_copy __ARGS((typval_T *from, typval_T *to, int deep, int copyID));
  static char_u *find_option_end __ARGS((char_u **arg, int *opt_flags));
  static char_u *trans_function_name __ARGS((char_u **pp, int skip, int flags, funcdict_T *fd));
  static int eval_fname_script __ARGS((char_u *p));
  static int eval_fname_sid __ARGS((char_u *p));
  static void list_func_head __ARGS((ufunc_T *fp, int indent));
  static ufunc_T *find_func __ARGS((char_u *name));
  static int function_exists __ARGS((char_u *name));
  static int builtin_function __ARGS((char_u *name, int len));
  #ifdef FEAT_PROFILE
  static void func_do_profile __ARGS((ufunc_T *fp));
  static void prof_sort_list __ARGS((FILE *fd, ufunc_T **sorttab, int st_len, char *title, int prefer_self));
  static void prof_func_line __ARGS((FILE *fd, int count, proftime_T *total, proftime_T *self, int prefer_self));
  static int
  # ifdef __BORLANDC__
      _RTLENTRYF
  # endif
  	prof_total_cmp __ARGS((const void *s1, const void *s2));
  static int
  # ifdef __BORLANDC__
      _RTLENTRYF
  # endif
  	prof_self_cmp __ARGS((const void *s1, const void *s2));
  #endif
  static int script_autoload __ARGS((char_u *name, int reload));
  static char_u *autoload_name __ARGS((char_u *name));
  static void cat_func_name __ARGS((char_u *buf, ufunc_T *fp));
  static void func_free __ARGS((ufunc_T *fp));
  static void call_user_func __ARGS((ufunc_T *fp, int argcount, typval_T *argvars, typval_T *rettv, linenr_T firstline, linenr_T lastline, dict_T *selfdict));
  static int can_free_funccal __ARGS((funccall_T *fc, int copyID)) ;
  static void free_funccal __ARGS((funccall_T *fc, int free_val));
  static void add_nr_var __ARGS((dict_T *dp, dictitem_T *v, char *name, varnumber_T nr));
  static win_T *find_win_by_nr __ARGS((typval_T *vp, tabpage_T *tp));
  static void getwinvar __ARGS((typval_T *argvars, typval_T *rettv, int off));
  static int searchpair_cmn __ARGS((typval_T *argvars, pos_T *match_pos));
  static int search_cmn __ARGS((typval_T *argvars, pos_T *match_pos, int *flagsp));
  static void setwinvar __ARGS((typval_T *argvars, typval_T *rettv, int off));
  static int write_list __ARGS((FILE *fd, list_T *list, int binary));
  static void get_cmd_output_as_rettv __ARGS((typval_T *argvars, typval_T *rettv, int retlist));
  
  
  #ifdef EBCDIC
  static int compare_func_name __ARGS((const void *s1, const void *s2));
  static void sortFunctions __ARGS(());
  #endif
  
  /*
   * Initialize the global and v: variables.
   */
      void
  eval_init()
  {
      int		    i;
      struct vimvar   *p;
  
      init_var_dict(&globvardict, &globvars_var, VAR_DEF_SCOPE);
      init_var_dict(&vimvardict, &vimvars_var, VAR_SCOPE);
      vimvardict.dv_lock = VAR_FIXED;
      hash_init(&compat_hashtab);
      hash_init(&func_hashtab);
  
      for (i = 0; i < VV_LEN; ++i)
      {
  	p = &vimvars[i];
  	STRCPY(p->vv_di.di_key, p->vv_name);
  	if (p->vv_flags & VV_RO)
  	    p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
  	else if (p->vv_flags & VV_RO_SBX)
  	    p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
  	else
  	    p->vv_di.di_flags = DI_FLAGS_FIX;
  
  	/* add to v: scope dict, unless the value is not always available */
  	if (p->vv_type != VAR_UNKNOWN)
  	    hash_add(&vimvarht, p->vv_di.di_key);
  	if (p->vv_flags & VV_COMPAT)
  	    /* add to compat scope dict */
  	    hash_add(&compat_hashtab, p->vv_di.di_key);
      }
      set_vim_var_nr(VV_SEARCHFORWARD, 1L);
      set_vim_var_nr(VV_HLSEARCH, 1L);
      set_vim_var_dict(VV_COMPLETED_ITEM, dict_alloc());
      set_reg_var(0);  /* default for v:register is not 0 but '"' */
  
  #ifdef EBCDIC
      /*
       * Sort the function table, to enable binary search.
       */
      sortFunctions();
  #endif
  }
  
  #if defined(EXITFREE) || defined(PROTO)
      void
  eval_clear()
  {
      int		    i;
      struct vimvar   *p;
  
      for (i = 0; i < VV_LEN; ++i)
      {
  	p = &vimvars[i];
  	if (p->vv_di.di_tv.v_type == VAR_STRING)
  	{
  	    vim_free(p->vv_str);
  	    p->vv_str = NULL;
  	}
  	else if (p->vv_di.di_tv.v_type == VAR_LIST)
  	{
  	    list_unref(p->vv_list);
  	    p->vv_list = NULL;
  	}
      }
      hash_clear(&vimvarht);
      hash_init(&vimvarht);  /* garbage_collect() will access it */
      hash_clear(&compat_hashtab);
  
      free_scriptnames();
  # if defined(FEAT_CMDL_COMPL)
      free_locales();
  # endif
  
      /* global variables */
      vars_clear(&globvarht);
  
      /* autoloaded script names */
      ga_clear_strings(&ga_loaded);
  
      /* Script-local variables. First clear all the variables and in a second
       * loop free the scriptvar_T, because a variable in one script might hold
       * a reference to the whole scope of another script. */
      for (i = 1; i <= ga_scripts.ga_len; ++i)
  	vars_clear(&SCRIPT_VARS(i));
      for (i = 1; i <= ga_scripts.ga_len; ++i)
  	vim_free(SCRIPT_SV(i));
      ga_clear(&ga_scripts);
  
      /* unreferenced lists and dicts */
      (void)garbage_collect();
  
      /* functions */
      free_all_functions();
      hash_clear(&func_hashtab);
  }
  #endif
  
  /*
   * Return the name of the executed function.
   */
      char_u *
  func_name(cookie)
      void *cookie;
  {
      return ((funccall_T *)cookie)->func->uf_name;
  }
  
  /*
   * Return the address holding the next breakpoint line for a funccall cookie.
   */
      linenr_T *
  func_breakpoint(cookie)
      void *cookie;
  {
      return &((funccall_T *)cookie)->breakpoint;
  }
  
  /*
   * Return the address holding the debug tick for a funccall cookie.
   */
      int *
  func_dbg_tick(cookie)
      void *cookie;
  {
      return &((funccall_T *)cookie)->dbg_tick;
  }
  
  /*
   * Return the nesting level for a funccall cookie.
   */
      int
  func_level(cookie)
      void *cookie;
  {
      return ((funccall_T *)cookie)->level;
  }
  
  /* pointer to funccal for currently active function */
  funccall_T *current_funccal = NULL;
  
  /* pointer to list of previously used funccal, still around because some
   * item in it is still being used. */
  funccall_T *previous_funccal = NULL;
  
  /*
   * Return TRUE when a function was ended by a ":return" command.
   */
      int
  current_func_returned()
  {
      return current_funccal->returned;
  }
  
  
  /*
   * Set an internal variable to a string value. Creates the variable if it does
   * not already exist.
   */
      void
  set_internal_string_var(name, value)
      char_u	*name;
      char_u	*value;
  {
      char_u	*val;
      typval_T	*tvp;
  
      val = vim_strsave(value);
      if (val != NULL)
      {
  	tvp = alloc_string_tv(val);
  	if (tvp != NULL)
  	{
  	    set_var(name, tvp, FALSE);
  	    free_tv(tvp);
  	}
      }
  }
  
  static lval_T	*redir_lval = NULL;
  static garray_T redir_ga;	/* only valid when redir_lval is not NULL */
  static char_u	*redir_endp = NULL;
  static char_u	*redir_varname = NULL;
  
  /*
   * Start recording command output to a variable
   * Returns OK if successfully completed the setup.  FAIL otherwise.
   */
      int
  var_redir_start(name, append)
      char_u	*name;
      int		append;		/* append to an existing variable */
  {
      int		save_emsg;
      int		err;
      typval_T	tv;
  
      /* Catch a bad name early. */
      if (!eval_isnamec1(*name))
      {
  	EMSG(_(e_invarg));
  	return FAIL;
      }
  
      /* Make a copy of the name, it is used in redir_lval until redir ends. */
      redir_varname = vim_strsave(name);
      if (redir_varname == NULL)
  	return FAIL;
  
      redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
      if (redir_lval == NULL)
      {
  	var_redir_stop();
  	return FAIL;
      }
  
      /* The output is stored in growarray "redir_ga" until redirection ends. */
      ga_init2(&redir_ga, (int)sizeof(char), 500);
  
      /* Parse the variable name (can be a dict or list entry). */
      redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, 0,
  							     FNE_CHECK_START);
      if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
      {
  	clear_lval(redir_lval);
  	if (redir_endp != NULL && *redir_endp != NUL)
  	    /* Trailing characters are present after the variable name */
  	    EMSG(_(e_trailing));
  	else
  	    EMSG(_(e_invarg));
  	redir_endp = NULL;  /* don't store a value, only cleanup */
  	var_redir_stop();
  	return FAIL;
      }
  
      /* check if we can write to the variable: set it to or append an empty
       * string */
      save_emsg = did_emsg;
      did_emsg = FALSE;
      tv.v_type = VAR_STRING;
      tv.vval.v_string = (char_u *)"";
      if (append)
  	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
      else
  	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
      clear_lval(redir_lval);
      err = did_emsg;
      did_emsg |= save_emsg;
      if (err)
      {
  	redir_endp = NULL;  /* don't store a value, only cleanup */
  	var_redir_stop();
  	return FAIL;
      }
  
      return OK;
  }
  
  /*
   * Append "value[value_len]" to the variable set by var_redir_start().
   * The actual appending is postponed until redirection ends, because the value
   * appended may in fact be the string we write to, changing it may cause freed
   * memory to be used:
   *   :redir => foo
   *   :let foo
   *   :redir END
   */
      void
  var_redir_str(value, value_len)
      char_u	*value;
      int		value_len;
  {
      int		len;
  
      if (redir_lval == NULL)
  	return;
  
      if (value_len == -1)
  	len = (int)STRLEN(value);	/* Append the entire string */
      else
  	len = value_len;		/* Append only "value_len" characters */
  
      if (ga_grow(&redir_ga, len) == OK)
      {
  	mch_memmove((char *)redir_ga.ga_data + redir_ga.ga_len, value, len);
  	redir_ga.ga_len += len;
      }
      else
  	var_redir_stop();
  }
  
  /*
   * Stop redirecting command output to a variable.
   * Frees the allocated memory.
   */
      void
  var_redir_stop()
  {
      typval_T	tv;
  
      if (redir_lval != NULL)
      {
  	/* If there was no error: assign the text to the variable. */
  	if (redir_endp != NULL)
  	{
  	    ga_append(&redir_ga, NUL);  /* Append the trailing NUL. */
  	    tv.v_type = VAR_STRING;
  	    tv.vval.v_string = redir_ga.ga_data;
  	    /* Call get_lval() again, if it's inside a Dict or List it may
  	     * have changed. */
  	    redir_endp = get_lval(redir_varname, NULL, redir_lval,
  					FALSE, FALSE, 0, FNE_CHECK_START);
  	    if (redir_endp != NULL && redir_lval->ll_name != NULL)
  		set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
  	    clear_lval(redir_lval);
  	}
  
  	/* free the collected output */
  	vim_free(redir_ga.ga_data);
  	redir_ga.ga_data = NULL;
  
  	vim_free(redir_lval);
  	redir_lval = NULL;
      }
      vim_free(redir_varname);
      redir_varname = NULL;
  }
  
  # if defined(FEAT_MBYTE) || defined(PROTO)
      int
  eval_charconvert(enc_from, enc_to, fname_from, fname_to)
      char_u	*enc_from;
      char_u	*enc_to;
      char_u	*fname_from;
      char_u	*fname_to;
  {
      int		err = FALSE;
  
      set_vim_var_string(VV_CC_FROM, enc_from, -1);
      set_vim_var_string(VV_CC_TO, enc_to, -1);
      set_vim_var_string(VV_FNAME_IN, fname_from, -1);
      set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
      if (eval_to_bool(p_ccv, &err, NULL, FALSE))
  	err = TRUE;
      set_vim_var_string(VV_CC_FROM, NULL, -1);
      set_vim_var_string(VV_CC_TO, NULL, -1);
      set_vim_var_string(VV_FNAME_IN, NULL, -1);
      set_vim_var_string(VV_FNAME_OUT, NULL, -1);
  
      if (err)
  	return FAIL;
      return OK;
  }
  # endif
  
  # if defined(FEAT_POSTSCRIPT) || defined(PROTO)
      int
  eval_printexpr(fname, args)
      char_u	*fname;
      char_u	*args;
  {
      int		err = FALSE;
  
      set_vim_var_string(VV_FNAME_IN, fname, -1);
      set_vim_var_string(VV_CMDARG, args, -1);
      if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
  	err = TRUE;
      set_vim_var_string(VV_FNAME_IN, NULL, -1);
      set_vim_var_string(VV_CMDARG, NULL, -1);
  
      if (err)
      {
  	mch_remove(fname);
  	return FAIL;
      }
      return OK;
  }
  # endif
  
  # if defined(FEAT_DIFF) || defined(PROTO)
      void
  eval_diff(origfile, newfile, outfile)
      char_u	*origfile;
      char_u	*newfile;
      char_u	*outfile;
  {
      int		err = FALSE;
  
      set_vim_var_string(VV_FNAME_IN, origfile, -1);
      set_vim_var_string(VV_FNAME_NEW, newfile, -1);
      set_vim_var_string(VV_FNAME_OUT, outfile, -1);
      (void)eval_to_bool(p_dex, &err, NULL, FALSE);
      set_vim_var_string(VV_FNAME_IN, NULL, -1);
      set_vim_var_string(VV_FNAME_NEW, NULL, -1);
      set_vim_var_string(VV_FNAME_OUT, NULL, -1);
  }
  
      void
  eval_patch(origfile, difffile, outfile)
      char_u	*origfile;
      char_u	*difffile;
      char_u	*outfile;
  {
      int		err;
  
      set_vim_var_string(VV_FNAME_IN, origfile, -1);
      set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
      set_vim_var_string(VV_FNAME_OUT, outfile, -1);
      (void)eval_to_bool(p_pex, &err, NULL, FALSE);
      set_vim_var_string(VV_FNAME_IN, NULL, -1);
      set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
      set_vim_var_string(VV_FNAME_OUT, NULL, -1);
  }
  # endif
  
  /*
   * Top level evaluation function, returning a boolean.
   * Sets "error" to TRUE if there was an error.
   * Return TRUE or FALSE.
   */
      int
  eval_to_bool(arg, error, nextcmd, skip)
      char_u	*arg;
      int		*error;
      char_u	**nextcmd;
      int		skip;	    /* only parse, don't execute */
  {
      typval_T	tv;
      int		retval = FALSE;
  
      if (skip)
  	++emsg_skip;
      if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
  	*error = TRUE;
      else
      {
  	*error = FALSE;
  	if (!skip)
  	{
  	    retval = (get_tv_number_chk(&tv, error) != 0);
  	    clear_tv(&tv);
  	}
      }
      if (skip)
  	--emsg_skip;
  
      return retval;
  }
  
  /*
   * Top level evaluation function, returning a string.  If "skip" is TRUE,
   * only parsing to "nextcmd" is done, without reporting errors.  Return
   * pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
   */
      char_u *
  eval_to_string_skip(arg, nextcmd, skip)
      char_u	*arg;
      char_u	**nextcmd;
      int		skip;	    /* only parse, don't execute */
  {
      typval_T	tv;
      char_u	*retval;
  
      if (skip)
  	++emsg_skip;
      if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
  	retval = NULL;
      else
      {
  	retval = vim_strsave(get_tv_string(&tv));
  	clear_tv(&tv);
      }
      if (skip)
  	--emsg_skip;
  
      return retval;
  }
  
  /*
   * Skip over an expression at "*pp".
   * Return FAIL for an error, OK otherwise.
   */
      int
  skip_expr(pp)
      char_u	**pp;
  {
      typval_T	rettv;
  
      *pp = skipwhite(*pp);
      return eval1(pp, &rettv, FALSE);
  }
  
  /*
   * Top level evaluation function, returning a string.
   * When "convert" is TRUE convert a List into a sequence of lines and convert
   * a Float to a String.
   * Return pointer to allocated memory, or NULL for failure.
   */
      char_u *
  eval_to_string(arg, nextcmd, convert)
      char_u	*arg;
      char_u	**nextcmd;
      int		convert;
  {
      typval_T	tv;
      char_u	*retval;
      garray_T	ga;
  #ifdef FEAT_FLOAT
      char_u	numbuf[NUMBUFLEN];
  #endif
  
      if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
  	retval = NULL;
      else
      {
  	if (convert && tv.v_type == VAR_LIST)
  	{
  	    ga_init2(&ga, (int)sizeof(char), 80);
  	    if (tv.vval.v_list != NULL)
  	    {
  		list_join(&ga, tv.vval.v_list, (char_u *)"\n", TRUE, 0);
  		if (tv.vval.v_list->lv_len > 0)
  		    ga_append(&ga, NL);
  	    }
  	    ga_append(&ga, NUL);
  	    retval = (char_u *)ga.ga_data;
  	}
  #ifdef FEAT_FLOAT
  	else if (convert && tv.v_type == VAR_FLOAT)
  	{
  	    vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv.vval.v_float);
  	    retval = vim_strsave(numbuf);
  	}
  #endif
  	else
  	    retval = vim_strsave(get_tv_string(&tv));
  	clear_tv(&tv);
      }
  
      return retval;
  }
  
  /*
   * Call eval_to_string() without using current local variables and using
   * textlock.  When "use_sandbox" is TRUE use the sandbox.
   */
      char_u *
  eval_to_string_safe(arg, nextcmd, use_sandbox)
      char_u	*arg;
      char_u	**nextcmd;
      int		use_sandbox;
  {
      char_u	*retval;
      void	*save_funccalp;
  
      save_funccalp = save_funccal();
      if (use_sandbox)
  	++sandbox;
      ++textlock;
      retval = eval_to_string(arg, nextcmd, FALSE);
      if (use_sandbox)
  	--sandbox;
      --textlock;
      restore_funccal(save_funccalp);
      return retval;
  }
  
  /*
   * Top level evaluation function, returning a number.
   * Evaluates "expr" silently.
   * Returns -1 for an error.
   */
      int
  eval_to_number(expr)
      char_u	*expr;
  {
      typval_T	rettv;
      int		retval;
      char_u	*p = skipwhite(expr);
  
      ++emsg_off;
  
      if (eval1(&p, &rettv, TRUE) == FAIL)
  	retval = -1;
      else
      {
  	retval = get_tv_number_chk(&rettv, NULL);
  	clear_tv(&rettv);
      }
      --emsg_off;
  
      return retval;
  }
  
  /*
   * Prepare v: variable "idx" to be used.
   * Save the current typeval in "save_tv".
   * When not used yet add the variable to the v: hashtable.
   */
      static void
  prepare_vimvar(idx, save_tv)
      int		idx;
      typval_T	*save_tv;
  {
      *save_tv = vimvars[idx].vv_tv;
      if (vimvars[idx].vv_type == VAR_UNKNOWN)
  	hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
  }
  
  /*
   * Restore v: variable "idx" to typeval "save_tv".
   * When no longer defined, remove the variable from the v: hashtable.
   */
      static void
  restore_vimvar(idx, save_tv)
      int		idx;
      typval_T	*save_tv;
  {
      hashitem_T	*hi;
  
      vimvars[idx].vv_tv = *save_tv;
      if (vimvars[idx].vv_type == VAR_UNKNOWN)
      {
  	hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
  	if (HASHITEM_EMPTY(hi))
  	    EMSG2(_(e_intern2), "restore_vimvar()");
  	else
  	    hash_remove(&vimvarht, hi);
      }
  }
  
  #if defined(FEAT_SPELL) || defined(PROTO)
  /*
   * Evaluate an expression to a list with suggestions.
   * For the "expr:" part of 'spellsuggest'.
   * Returns NULL when there is an error.
   */
      list_T *
  eval_spell_expr(badword, expr)
      char_u	*badword;
      char_u	*expr;
  {
      typval_T	save_val;
      typval_T	rettv;
      list_T	*list = NULL;
      char_u	*p = skipwhite(expr);
  
      /* Set "v:val" to the bad word. */
      prepare_vimvar(VV_VAL, &save_val);
      vimvars[VV_VAL].vv_type = VAR_STRING;
      vimvars[VV_VAL].vv_str = badword;
      if (p_verbose == 0)
  	++emsg_off;
  
      if (eval1(&p, &rettv, TRUE) == OK)
      {
  	if (rettv.v_type != VAR_LIST)
  	    clear_tv(&rettv);
  	else
  	    list = rettv.vval.v_list;
      }
  
      if (p_verbose == 0)
  	--emsg_off;
      restore_vimvar(VV_VAL, &save_val);
  
      return list;
  }
  
  /*
   * "list" is supposed to contain two items: a word and a number.  Return the
   * word in "pp" and the number as the return value.
   * Return -1 if anything isn't right.
   * Used to get the good word and score from the eval_spell_expr() result.
   */
      int
  get_spellword(list, pp)
      list_T	*list;
      char_u	**pp;
  {
      listitem_T	*li;
  
      li = list->lv_first;
      if (li == NULL)
  	return -1;
      *pp = get_tv_string(&li->li_tv);
  
      li = li->li_next;
      if (li == NULL)
  	return -1;
      return get_tv_number(&li->li_tv);
  }
  #endif
  
  /*
   * Top level evaluation function.
   * Returns an allocated typval_T with the result.
   * Returns NULL when there is an error.
   */
      typval_T *
  eval_expr(arg, nextcmd)
      char_u	*arg;
      char_u	**nextcmd;
  {
      typval_T	*tv;
  
      tv = (typval_T *)alloc(sizeof(typval_T));
      if (tv != NULL && eval0(arg, tv, nextcmd, TRUE) == FAIL)
      {
  	vim_free(tv);
  	tv = NULL;
      }
  
      return tv;
  }
  
  
  /*
   * Call some vimL function and return the result in "*rettv".
   * Uses argv[argc] for the function arguments.  Only Number and String
   * arguments are currently supported.
   * Returns OK or FAIL.
   */
      int
  call_vim_function(func, argc, argv, safe, str_arg_only, rettv)
      char_u      *func;
      int		argc;
      char_u      **argv;
      int		safe;		/* use the sandbox */
      int		str_arg_only;	/* all arguments are strings */
      typval_T	*rettv;
  {
      typval_T	*argvars;
      long	n;
      int		len;
      int		i;
      int		doesrange;
      void	*save_funccalp = NULL;
      int		ret;
  
      argvars = (typval_T *)alloc((unsigned)((argc + 1) * sizeof(typval_T)));
      if (argvars == NULL)
  	return FAIL;
  
      for (i = 0; i < argc; i++)
      {
  	/* Pass a NULL or empty argument as an empty string */
  	if (argv[i] == NULL || *argv[i] == NUL)
  	{
  	    argvars[i].v_type = VAR_STRING;
  	    argvars[i].vval.v_string = (char_u *)"";
  	    continue;
  	}
  
  	if (str_arg_only)
  	    len = 0;
  	else
  	    /* Recognize a number argument, the others must be strings. */
  	    vim_str2nr(argv[i], NULL, &len, TRUE, TRUE, &n, NULL, 0);
  	if (len != 0 && len == (int)STRLEN(argv[i]))
  	{
  	    argvars[i].v_type = VAR_NUMBER;
  	    argvars[i].vval.v_number = n;
  	}
  	else
  	{
  	    argvars[i].v_type = VAR_STRING;
  	    argvars[i].vval.v_string = argv[i];
  	}
      }
  
      if (safe)
      {
  	save_funccalp = save_funccal();
  	++sandbox;
      }
  
      rettv->v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
      ret = call_func(func, (int)STRLEN(func), rettv, argc, argvars,
  		    curwin->w_cursor.lnum, curwin->w_cursor.lnum,
  		    &doesrange, TRUE, NULL);
      if (safe)
      {
  	--sandbox;
  	restore_funccal(save_funccalp);
      }
      vim_free(argvars);
  
      if (ret == FAIL)
  	clear_tv(rettv);
  
      return ret;
  }
  
  /*
   * Call vimL function "func" and return the result as a number.
   * Returns -1 when calling the function fails.
   * Uses argv[argc] for the function arguments.
   */
      long
  call_func_retnr(func, argc, argv, safe)
      char_u      *func;
      int		argc;
      char_u      **argv;
      int		safe;		/* use the sandbox */
  {
      typval_T	rettv;
      long	retval;
  
      /* All arguments are passed as strings, no conversion to number. */
      if (call_vim_function(func, argc, argv, safe, TRUE, &rettv) == FAIL)
  	return -1;
  
      retval = get_tv_number_chk(&rettv, NULL);
      clear_tv(&rettv);
      return retval;
  }
  
  #if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) \
  	|| defined(FEAT_COMPL_FUNC) || defined(PROTO)
  
  # if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) || defined(PROTO)
  /*
   * Call vimL function "func" and return the result as a string.
   * Returns NULL when calling the function fails.
   * Uses argv[argc] for the function arguments.
   */
      void *
  call_func_retstr(func, argc, argv, safe)
      char_u      *func;
      int		argc;
      char_u      **argv;
      int		safe;		/* use the sandbox */
  {
      typval_T	rettv;
      char_u	*retval;
  
      /* All arguments are passed as strings, no conversion to number. */
      if (call_vim_function(func, argc, argv, safe, TRUE, &rettv) == FAIL)
  	return NULL;
  
      retval = vim_strsave(get_tv_string(&rettv));
      clear_tv(&rettv);
      return retval;
  }
  # endif
  
  /*
   * Call vimL function "func" and return the result as a List.
   * Uses argv[argc] for the function arguments.
   * Returns NULL when there is something wrong.
   */
      void *
  call_func_retlist(func, argc, argv, safe)
      char_u      *func;
      int		argc;
      char_u      **argv;
      int		safe;		/* use the sandbox */
  {
      typval_T	rettv;
  
      /* All arguments are passed as strings, no conversion to number. */
      if (call_vim_function(func, argc, argv, safe, TRUE, &rettv) == FAIL)
  	return NULL;
  
      if (rettv.v_type != VAR_LIST)
      {
  	clear_tv(&rettv);
  	return NULL;
      }
  
      return rettv.vval.v_list;
  }
  #endif
  
  /*
   * Save the current function call pointer, and set it to NULL.
   * Used when executing autocommands and for ":source".
   */
      void *
  save_funccal()
  {
      funccall_T *fc = current_funccal;
  
      current_funccal = NULL;
      return (void *)fc;
  }
  
      void
  restore_funccal(vfc)
      void *vfc;
  {
      funccall_T *fc = (funccall_T *)vfc;
  
      current_funccal = fc;
  }
  
  #if defined(FEAT_PROFILE) || defined(PROTO)
  /*
   * Prepare profiling for entering a child or something else that is not
   * counted for the script/function itself.
   * Should always be called in pair with prof_child_exit().
   */
      void
  prof_child_enter(tm)
      proftime_T *tm;	/* place to store waittime */
  {
      funccall_T *fc = current_funccal;
  
      if (fc != NULL && fc->func->uf_profiling)
  	profile_start(&fc->prof_child);
      script_prof_save(tm);
  }
  
  /*
   * Take care of time spent in a child.
   * Should always be called after prof_child_enter().
   */
      void
  prof_child_exit(tm)
      proftime_T *tm;	/* where waittime was stored */
  {
      funccall_T *fc = current_funccal;
  
      if (fc != NULL && fc->func->uf_profiling)
      {
  	profile_end(&fc->prof_child);
  	profile_sub_wait(tm, &fc->prof_child); /* don't count waiting time */
  	profile_add(&fc->func->uf_tm_children, &fc->prof_child);
  	profile_add(&fc->func->uf_tml_children, &fc->prof_child);
      }
      script_prof_restore(tm);
  }
  #endif
  
  
  #ifdef FEAT_FOLDING
  /*
   * Evaluate 'foldexpr'.  Returns the foldlevel, and any character preceding
   * it in "*cp".  Doesn't give error messages.
   */
      int
  eval_foldexpr(arg, cp)
      char_u	*arg;
      int		*cp;
  {
      typval_T	tv;
      int		retval;
      char_u	*s;
      int		use_sandbox = was_set_insecurely((char_u *)"foldexpr",
  								   OPT_LOCAL);
  
      ++emsg_off;
      if (use_sandbox)
  	++sandbox;
      ++textlock;
      *cp = NUL;
      if (eval0(arg, &tv, NULL, TRUE) == FAIL)
  	retval = 0;
      else
      {
  	/* If the result is a number, just return the number. */
  	if (tv.v_type == VAR_NUMBER)
  	    retval = tv.vval.v_number;
  	else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
  	    retval = 0;
  	else
  	{
  	    /* If the result is a string, check if there is a non-digit before
  	     * the number. */
  	    s = tv.vval.v_string;
  	    if (!VIM_ISDIGIT(*s) && *s != '-')
  		*cp = *s++;
  	    retval = atol((char *)s);
  	}
  	clear_tv(&tv);
      }
      --emsg_off;
      if (use_sandbox)
  	--sandbox;
      --textlock;
  
      return retval;
  }
  #endif
  
  /*
   * ":let"			list all variable values
   * ":let var1 var2"		list variable values
   * ":let var = expr"		assignment command.
   * ":let var += expr"		assignment command.
   * ":let var -= expr"		assignment command.
   * ":let var .= expr"		assignment command.
   * ":let [var1, var2] = expr"	unpack list.
   */
      void
  ex_let(eap)
      exarg_T	*eap;
  {
      char_u	*arg = eap->arg;
      char_u	*expr = NULL;
      typval_T	rettv;
      int		i;
      int		var_count = 0;
      int		semicolon = 0;
      char_u	op[2];
      char_u	*argend;
      int		first = TRUE;
  
      argend = skip_var_list(arg, &var_count, &semicolon);
      if (argend == NULL)
  	return;
      if (argend > arg && argend[-1] == '.')  /* for var.='str' */
  	--argend;
      expr = skipwhite(argend);
      if (*expr != '=' && !(vim_strchr((char_u *)"+-.", *expr) != NULL
  			  && expr[1] == '='))
      {
  	/*
  	 * ":let" without "=": list variables
  	 */
  	if (*arg == '[')
  	    EMSG(_(e_invarg));
  	else if (!ends_excmd(*arg))
  	    /* ":let var1 var2" */
  	    arg = list_arg_vars(eap, arg, &first);
  	else if (!eap->skip)
  	{
  	    /* ":let" */
  	    list_glob_vars(&first);
  	    list_buf_vars(&first);
  	    list_win_vars(&first);
  #ifdef FEAT_WINDOWS
  	    list_tab_vars(&first);
  #endif
  	    list_script_vars(&first);
  	    list_func_vars(&first);
  	    list_vim_vars(&first);
  	}
  	eap->nextcmd = check_nextcmd(arg);
      }
      else
      {
  	op[0] = '=';
  	op[1] = NUL;
  	if (*expr != '=')
  	{
  	    if (vim_strchr((char_u *)"+-.", *expr) != NULL)
  		op[0] = *expr;   /* +=, -= or .= */
  	    expr = skipwhite(expr + 2);
  	}
  	else
  	    expr = skipwhite(expr + 1);
  
  	if (eap->skip)
  	    ++emsg_skip;
  	i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
  	if (eap->skip)
  	{
  	    if (i != FAIL)
  		clear_tv(&rettv);
  	    --emsg_skip;
  	}
  	else if (i != FAIL)
  	{
  	    (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
  									  op);
  	    clear_tv(&rettv);
  	}
      }
  }
  
  /*
   * Assign the typevalue "tv" to the variable or variables at "arg_start".
   * Handles both "var" with any type and "[var, var; var]" with a list type.
   * When "nextchars" is not NULL it points to a string with characters that
   * must appear after the variable(s).  Use "+", "-" or "." for add, subtract
   * or concatenate.
   * Returns OK or FAIL;
   */
      static int
  ex_let_vars(arg_start, tv, copy, semicolon, var_count, nextchars)
      char_u	*arg_start;
      typval_T	*tv;
      int		copy;		/* copy values from "tv", don't move */
      int		semicolon;	/* from skip_var_list() */
      int		var_count;	/* from skip_var_list() */
      char_u	*nextchars;
  {
      char_u	*arg = arg_start;
      list_T	*l;
      int		i;
      listitem_T	*item;
      typval_T	ltv;
  
      if (*arg != '[')
      {
  	/*
  	 * ":let var = expr" or ":for var in list"
  	 */
  	if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
  	    return FAIL;
  	return OK;
      }
  
      /*
       * ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
       */
      if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
      {
  	EMSG(_(e_listreq));
  	return FAIL;
      }
  
      i = list_len(l);
      if (semicolon == 0 && var_count < i)
      {
  	EMSG(_("E687: Less targets than List items"));
  	return FAIL;
      }
      if (var_count - semicolon > i)
      {
  	EMSG(_("E688: More targets than List items"));
  	return FAIL;
      }
  
      item = l->lv_first;
      while (*arg != ']')
      {
  	arg = skipwhite(arg + 1);
  	arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
  	item = item->li_next;
  	if (arg == NULL)
  	    return FAIL;
  
  	arg = skipwhite(arg);
  	if (*arg == ';')
  	{
  	    /* Put the rest of the list (may be empty) in the var after ';'.
  	     * Create a new list for this. */
  	    l = list_alloc();
  	    if (l == NULL)
  		return FAIL;
  	    while (item != NULL)
  	    {
  		list_append_tv(l, &item->li_tv);
  		item = item->li_next;
  	    }
  
  	    ltv.v_type = VAR_LIST;
  	    ltv.v_lock = 0;
  	    ltv.vval.v_list = l;
  	    l->lv_refcount = 1;
  
  	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
  						    (char_u *)"]", nextchars);
  	    clear_tv(&ltv);
  	    if (arg == NULL)
  		return FAIL;
  	    break;
  	}
  	else if (*arg != ',' && *arg != ']')
  	{
  	    EMSG2(_(e_intern2), "ex_let_vars()");
  	    return FAIL;
  	}
      }
  
      return OK;
  }
  
  /*
   * Skip over assignable variable "var" or list of variables "[var, var]".
   * Used for ":let varvar = expr" and ":for varvar in expr".
   * For "[var, var]" increment "*var_count" for each variable.
   * for "[var, var; var]" set "semicolon".
   * Return NULL for an error.
   */
      static char_u *
  skip_var_list(arg, var_count, semicolon)
      char_u	*arg;
      int		*var_count;
      int		*semicolon;
  {
      char_u	*p, *s;
  
      if (*arg == '[')
      {
  	/* "[var, var]": find the matching ']'. */
  	p = arg;
  	for (;;)
  	{
  	    p = skipwhite(p + 1);	/* skip whites after '[', ';' or ',' */
  	    s = skip_var_one(p);
  	    if (s == p)
  	    {
  		EMSG2(_(e_invarg2), p);
  		return NULL;
  	    }
  	    ++*var_count;
  
  	    p = skipwhite(s);
  	    if (*p == ']')
  		break;
  	    else if (*p == ';')
  	    {
  		if (*semicolon == 1)
  		{
  		    EMSG(_("Double ; in list of variables"));
  		    return NULL;
  		}
  		*semicolon = 1;
  	    }
  	    else if (*p != ',')
  	    {
  		EMSG2(_(e_invarg2), p);
  		return NULL;
  	    }
  	}
  	return p + 1;
      }
      else
  	return skip_var_one(arg);
  }
  
  /*
   * Skip one (assignable) variable name, including @r, $VAR, &option, d.key,
   * l[idx].
   */
      static char_u *
  skip_var_one(arg)
      char_u	*arg;
  {
      if (*arg == '@' && arg[1] != NUL)
  	return arg + 2;
      return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
  				   NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
  }
  
  /*
   * List variables for hashtab "ht" with prefix "prefix".
   * If "empty" is TRUE also list NULL strings as empty strings.
   */
      static void
  list_hashtable_vars(ht, prefix, empty, first)
      hashtab_T	*ht;
      char_u	*prefix;
      int		empty;
      int		*first;
  {
      hashitem_T	*hi;
      dictitem_T	*di;
      int		todo;
  
      todo = (int)ht->ht_used;
      for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
      {
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    --todo;
  	    di = HI2DI(hi);
  	    if (empty || di->di_tv.v_type != VAR_STRING
  					   || di->di_tv.vval.v_string != NULL)
  		list_one_var(di, prefix, first);
  	}
      }
  }
  
  /*
   * List global variables.
   */
      static void
  list_glob_vars(first)
      int *first;
  {
      list_hashtable_vars(&globvarht, (char_u *)"", TRUE, first);
  }
  
  /*
   * List buffer variables.
   */
      static void
  list_buf_vars(first)
      int *first;
  {
      char_u	numbuf[NUMBUFLEN];
  
      list_hashtable_vars(&curbuf->b_vars->dv_hashtab, (char_u *)"b:",
  								 TRUE, first);
  
      sprintf((char *)numbuf, "%ld", (long)curbuf->b_changedtick);
      list_one_var_a((char_u *)"b:", (char_u *)"changedtick", VAR_NUMBER,
  							       numbuf, first);
  }
  
  /*
   * List window variables.
   */
      static void
  list_win_vars(first)
      int *first;
  {
      list_hashtable_vars(&curwin->w_vars->dv_hashtab,
  						 (char_u *)"w:", TRUE, first);
  }
  
  #ifdef FEAT_WINDOWS
  /*
   * List tab page variables.
   */
      static void
  list_tab_vars(first)
      int *first;
  {
      list_hashtable_vars(&curtab->tp_vars->dv_hashtab,
  						 (char_u *)"t:", TRUE, first);
  }
  #endif
  
  /*
   * List Vim variables.
   */
      static void
  list_vim_vars(first)
      int *first;
  {
      list_hashtable_vars(&vimvarht, (char_u *)"v:", FALSE, first);
  }
  
  /*
   * List script-local variables, if there is a script.
   */
      static void
  list_script_vars(first)
      int *first;
  {
      if (current_SID > 0 && current_SID <= ga_scripts.ga_len)
  	list_hashtable_vars(&SCRIPT_VARS(current_SID),
  						(char_u *)"s:", FALSE, first);
  }
  
  /*
   * List function variables, if there is a function.
   */
      static void
  list_func_vars(first)
      int *first;
  {
      if (current_funccal != NULL)
  	list_hashtable_vars(&current_funccal->l_vars.dv_hashtab,
  						(char_u *)"l:", FALSE, first);
  }
  
  /*
   * List variables in "arg".
   */
      static char_u *
  list_arg_vars(eap, arg, first)
      exarg_T	*eap;
      char_u	*arg;
      int		*first;
  {
      int		error = FALSE;
      int		len;
      char_u	*name;
      char_u	*name_start;
      char_u	*arg_subsc;
      char_u	*tofree;
      typval_T    tv;
  
      while (!ends_excmd(*arg) && !got_int)
      {
  	if (error || eap->skip)
  	{
  	    arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
  	    if (!vim_iswhite(*arg) && !ends_excmd(*arg))
  	    {
  		emsg_severe = TRUE;
  		EMSG(_(e_trailing));
  		break;
  	    }
  	}
  	else
  	{
  	    /* get_name_len() takes care of expanding curly braces */
  	    name_start = name = arg;
  	    len = get_name_len(&arg, &tofree, TRUE, TRUE);
  	    if (len <= 0)
  	    {
  		/* This is mainly to keep test 49 working: when expanding
  		 * curly braces fails overrule the exception error message. */
  		if (len < 0 && !aborting())
  		{
  		    emsg_severe = TRUE;
  		    EMSG2(_(e_invarg2), arg);
  		    break;
  		}
  		error = TRUE;
  	    }
  	    else
  	    {
  		if (tofree != NULL)
  		    name = tofree;
  		if (get_var_tv(name, len, &tv, NULL, TRUE, FALSE) == FAIL)
  		    error = TRUE;
  		else
  		{
  		    /* handle d.key, l[idx], f(expr) */
  		    arg_subsc = arg;
  		    if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
  			error = TRUE;
  		    else
  		    {
  			if (arg == arg_subsc && len == 2 && name[1] == ':')
  			{
  			    switch (*name)
  			    {
  				case 'g': list_glob_vars(first); break;
  				case 'b': list_buf_vars(first); break;
  				case 'w': list_win_vars(first); break;
  #ifdef FEAT_WINDOWS
  				case 't': list_tab_vars(first); break;
  #endif
  				case 'v': list_vim_vars(first); break;
  				case 's': list_script_vars(first); break;
  				case 'l': list_func_vars(first); break;
  				default:
  					  EMSG2(_("E738: Can't list variables for %s"), name);
  			    }
  			}
  			else
  			{
  			    char_u	numbuf[NUMBUFLEN];
  			    char_u	*tf;
  			    int		c;
  			    char_u	*s;
  
  			    s = echo_string(&tv, &tf, numbuf, 0);
  			    c = *arg;
  			    *arg = NUL;
  			    list_one_var_a((char_u *)"",
  				    arg == arg_subsc ? name : name_start,
  				    tv.v_type,
  				    s == NULL ? (char_u *)"" : s,
  				    first);
  			    *arg = c;
  			    vim_free(tf);
  			}
  			clear_tv(&tv);
  		    }
  		}
  	    }
  
  	    vim_free(tofree);
  	}
  
  	arg = skipwhite(arg);
      }
  
      return arg;
  }
  
  /*
   * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
   * Returns a pointer to the char just after the var name.
   * Returns NULL if there is an error.
   */
      static char_u *
  ex_let_one(arg, tv, copy, endchars, op)
      char_u	*arg;		/* points to variable name */
      typval_T	*tv;		/* value to assign to variable */
      int		copy;		/* copy value from "tv" */
      char_u	*endchars;	/* valid chars after variable name  or NULL */
      char_u	*op;		/* "+", "-", "."  or NULL*/
  {
      int		c1;
      char_u	*name;
      char_u	*p;
      char_u	*arg_end = NULL;
      int		len;
      int		opt_flags;
      char_u	*tofree = NULL;
  
      /*
       * ":let $VAR = expr": Set environment variable.
       */
      if (*arg == '$')
      {
  	/* Find the end of the name. */
  	++arg;
  	name = arg;
  	len = get_env_len(&arg);
  	if (len == 0)
  	    EMSG2(_(e_invarg2), name - 1);
  	else
  	{
  	    if (op != NULL && (*op == '+' || *op == '-'))
  		EMSG2(_(e_letwrong), op);
  	    else if (endchars != NULL
  			     && vim_strchr(endchars, *skipwhite(arg)) == NULL)
  		EMSG(_(e_letunexp));
  	    else if (!check_secure())
  	    {
  		c1 = name[len];
  		name[len] = NUL;
  		p = get_tv_string_chk(tv);
  		if (p != NULL && op != NULL && *op == '.')
  		{
  		    int	    mustfree = FALSE;
  		    char_u  *s = vim_getenv(name, &mustfree);
  
  		    if (s != NULL)
  		    {
  			p = tofree = concat_str(s, p);
  			if (mustfree)
  			    vim_free(s);
  		    }
  		}
  		if (p != NULL)
  		{
  		    vim_setenv(name, p);
  		    if (STRICMP(name, "HOME") == 0)
  			init_homedir();
  		    else if (didset_vim && STRICMP(name, "VIM") == 0)
  			didset_vim = FALSE;
  		    else if (didset_vimruntime
  					&& STRICMP(name, "VIMRUNTIME") == 0)
  			didset_vimruntime = FALSE;
  		    arg_end = arg;
  		}
  		name[len] = c1;
  		vim_free(tofree);
  	    }
  	}
      }
  
      /*
       * ":let &option = expr": Set option value.
       * ":let &l:option = expr": Set local option value.
       * ":let &g:option = expr": Set global option value.
       */
      else if (*arg == '&')
      {
  	/* Find the end of the name. */
  	p = find_option_end(&arg, &opt_flags);
  	if (p == NULL || (endchars != NULL
  			      && vim_strchr(endchars, *skipwhite(p)) == NULL))
  	    EMSG(_(e_letunexp));
  	else
  	{
  	    long	n;
  	    int		opt_type;
  	    long	numval;
  	    char_u	*stringval = NULL;
  	    char_u	*s;
  
  	    c1 = *p;
  	    *p = NUL;
  
  	    n = get_tv_number(tv);
  	    s = get_tv_string_chk(tv);	    /* != NULL if number or string */
  	    if (s != NULL && op != NULL && *op != '=')
  	    {
  		opt_type = get_option_value(arg, &numval,
  						       &stringval, opt_flags);
  		if ((opt_type == 1 && *op == '.')
  			|| (opt_type == 0 && *op != '.'))
  		    EMSG2(_(e_letwrong), op);
  		else
  		{
  		    if (opt_type == 1)  /* number */
  		    {
  			if (*op == '+')
  			    n = numval + n;
  			else
  			    n = numval - n;
  		    }
  		    else if (opt_type == 0 && stringval != NULL) /* string */
  		    {
  			s = concat_str(stringval, s);
  			vim_free(stringval);
  			stringval = s;
  		    }
  		}
  	    }
  	    if (s != NULL)
  	    {
  		set_option_value(arg, n, s, opt_flags);
  		arg_end = p;
  	    }
  	    *p = c1;
  	    vim_free(stringval);
  	}
      }
  
      /*
       * ":let @r = expr": Set register contents.
       */
      else if (*arg == '@')
      {
  	++arg;
  	if (op != NULL && (*op == '+' || *op == '-'))
  	    EMSG2(_(e_letwrong), op);
  	else if (endchars != NULL
  			 && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
  	    EMSG(_(e_letunexp));
  	else
  	{
  	    char_u	*ptofree = NULL;
  	    char_u	*s;
  
  	    p = get_tv_string_chk(tv);
  	    if (p != NULL && op != NULL && *op == '.')
  	    {
  		s = get_reg_contents(*arg == '@' ? '"' : *arg, GREG_EXPR_SRC);
  		if (s != NULL)
  		{
  		    p = ptofree = concat_str(s, p);
  		    vim_free(s);
  		}
  	    }
  	    if (p != NULL)
  	    {
  		write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
  		arg_end = arg + 1;
  	    }
  	    vim_free(ptofree);
  	}
      }
  
      /*
       * ":let var = expr": Set internal variable.
       * ":let {expr} = expr": Idem, name made with curly braces
       */
      else if (eval_isnamec1(*arg) || *arg == '{')
      {
  	lval_T	lv;
  
  	p = get_lval(arg, tv, &lv, FALSE, FALSE, 0, FNE_CHECK_START);
  	if (p != NULL && lv.ll_name != NULL)
  	{
  	    if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
  		EMSG(_(e_letunexp));
  	    else
  	    {
  		set_var_lval(&lv, p, tv, copy, op);
  		arg_end = p;
  	    }
  	}
  	clear_lval(&lv);
      }
  
      else
  	EMSG2(_(e_invarg2), arg);
  
      return arg_end;
  }
  
  /*
   * If "arg" is equal to "b:changedtick" give an error and return TRUE.
   */
      static int
  check_changedtick(arg)
      char_u	*arg;
  {
      if (STRNCMP(arg, "b:changedtick", 13) == 0 && !eval_isnamec(arg[13]))
      {
  	EMSG2(_(e_readonlyvar), arg);
  	return TRUE;
      }
      return FALSE;
  }
  
  /*
   * Get an lval: variable, Dict item or List item that can be assigned a value
   * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
   * "name.key", "name.key[expr]" etc.
   * Indexing only works if "name" is an existing List or Dictionary.
   * "name" points to the start of the name.
   * If "rettv" is not NULL it points to the value to be assigned.
   * "unlet" is TRUE for ":unlet": slightly different behavior when something is
   * wrong; must end in space or cmd separator.
   *
   * flags:
   *  GLV_QUIET:       do not give error messages
   *  GLV_NO_AUTOLOAD: do not use script autoloading
   *
   * Returns a pointer to just after the name, including indexes.
   * When an evaluation error occurs "lp->ll_name" is NULL;
   * Returns NULL for a parsing error.  Still need to free items in "lp"!
   */
      static char_u *
  get_lval(name, rettv, lp, unlet, skip, flags, fne_flags)
      char_u	*name;
      typval_T	*rettv;
      lval_T	*lp;
      int		unlet;
      int		skip;
      int		flags;	    /* GLV_ values */
      int		fne_flags;  /* flags for find_name_end() */
  {
      char_u	*p;
      char_u	*expr_start, *expr_end;
      int		cc;
      dictitem_T	*v;
      typval_T	var1;
      typval_T	var2;
      int		empty1 = FALSE;
      listitem_T	*ni;
      char_u	*key = NULL;
      int		len;
      hashtab_T	*ht;
      int		quiet = flags & GLV_QUIET;
  
      /* Clear everything in "lp". */
      vim_memset(lp, 0, sizeof(lval_T));
  
      if (skip)
      {
  	/* When skipping just find the end of the name. */
  	lp->ll_name = name;
  	return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
      }
  
      /* Find the end of the name. */
      p = find_name_end(name, &expr_start, &expr_end, fne_flags);
      if (expr_start != NULL)
      {
  	/* Don't expand the name when we already know there is an error. */
  	if (unlet && !vim_iswhite(*p) && !ends_excmd(*p)
  						    && *p != '[' && *p != '.')
  	{
  	    EMSG(_(e_trailing));
  	    return NULL;
  	}
  
  	lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
  	if (lp->ll_exp_name == NULL)
  	{
  	    /* Report an invalid expression in braces, unless the
  	     * expression evaluation has been cancelled due to an
  	     * aborting error, an interrupt, or an exception. */
  	    if (!aborting() && !quiet)
  	    {
  		emsg_severe = TRUE;
  		EMSG2(_(e_invarg2), name);
  		return NULL;
  	    }
  	}
  	lp->ll_name = lp->ll_exp_name;
      }
      else
  	lp->ll_name = name;
  
      /* Without [idx] or .key we are done. */
      if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
  	return p;
  
      cc = *p;
      *p = NUL;
      v = find_var(lp->ll_name, &ht, flags & GLV_NO_AUTOLOAD);
      if (v == NULL && !quiet)
  	EMSG2(_(e_undefvar), lp->ll_name);
      *p = cc;
      if (v == NULL)
  	return NULL;
  
      /*
       * Loop until no more [idx] or .key is following.
       */
      lp->ll_tv = &v->di_tv;
      while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
      {
  	if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
  		&& !(lp->ll_tv->v_type == VAR_DICT
  					   && lp->ll_tv->vval.v_dict != NULL))
  	{
  	    if (!quiet)
  		EMSG(_("E689: Can only index a List or Dictionary"));
  	    return NULL;
  	}
  	if (lp->ll_range)
  	{
  	    if (!quiet)
  		EMSG(_("E708: [:] must come last"));
  	    return NULL;
  	}
  
  	len = -1;
  	if (*p == '.')
  	{
  	    key = p + 1;
  	    for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
  		;
  	    if (len == 0)
  	    {
  		if (!quiet)
  		    EMSG(_(e_emptykey));
  		return NULL;
  	    }
  	    p = key + len;
  	}
  	else
  	{
  	    /* Get the index [expr] or the first index [expr: ]. */
  	    p = skipwhite(p + 1);
  	    if (*p == ':')
  		empty1 = TRUE;
  	    else
  	    {
  		empty1 = FALSE;
  		if (eval1(&p, &var1, TRUE) == FAIL)	/* recursive! */
  		    return NULL;
  		if (get_tv_string_chk(&var1) == NULL)
  		{
  		    /* not a number or string */
  		    clear_tv(&var1);
  		    return NULL;
  		}
  	    }
  
  	    /* Optionally get the second index [ :expr]. */
  	    if (*p == ':')
  	    {
  		if (lp->ll_tv->v_type == VAR_DICT)
  		{
  		    if (!quiet)
  			EMSG(_(e_dictrange));
  		    if (!empty1)
  			clear_tv(&var1);
  		    return NULL;
  		}
  		if (rettv != NULL && (rettv->v_type != VAR_LIST
  					       || rettv->vval.v_list == NULL))
  		{
  		    if (!quiet)
  			EMSG(_("E709: [:] requires a List value"));
  		    if (!empty1)
  			clear_tv(&var1);
  		    return NULL;
  		}
  		p = skipwhite(p + 1);
  		if (*p == ']')
  		    lp->ll_empty2 = TRUE;
  		else
  		{
  		    lp->ll_empty2 = FALSE;
  		    if (eval1(&p, &var2, TRUE) == FAIL)	/* recursive! */
  		    {
  			if (!empty1)
  			    clear_tv(&var1);
  			return NULL;
  		    }
  		    if (get_tv_string_chk(&var2) == NULL)
  		    {
  			/* not a number or string */
  			if (!empty1)
  			    clear_tv(&var1);
  			clear_tv(&var2);
  			return NULL;
  		    }
  		}
  		lp->ll_range = TRUE;
  	    }
  	    else
  		lp->ll_range = FALSE;
  
  	    if (*p != ']')
  	    {
  		if (!quiet)
  		    EMSG(_(e_missbrac));
  		if (!empty1)
  		    clear_tv(&var1);
  		if (lp->ll_range && !lp->ll_empty2)
  		    clear_tv(&var2);
  		return NULL;
  	    }
  
  	    /* Skip to past ']'. */
  	    ++p;
  	}
  
  	if (lp->ll_tv->v_type == VAR_DICT)
  	{
  	    if (len == -1)
  	    {
  		/* "[key]": get key from "var1" */
  		key = get_tv_string(&var1);	/* is number or string */
  		if (*key == NUL)
  		{
  		    if (!quiet)
  			EMSG(_(e_emptykey));
  		    clear_tv(&var1);
  		    return NULL;
  		}
  	    }
  	    lp->ll_list = NULL;
  	    lp->ll_dict = lp->ll_tv->vval.v_dict;
  	    lp->ll_di = dict_find(lp->ll_dict, key, len);
  
  	    /* When assigning to a scope dictionary check that a function and
  	     * variable name is valid (only variable name unless it is l: or
  	     * g: dictionary). Disallow overwriting a builtin function. */
  	    if (rettv != NULL && lp->ll_dict->dv_scope != 0)
  	    {
  		int prevval;
  		int wrong;
  
  		if (len != -1)
  		{
  		    prevval = key[len];
  		    key[len] = NUL;
  		}
  		else
  		    prevval = 0; /* avoid compiler warning */
  		wrong = (lp->ll_dict->dv_scope == VAR_DEF_SCOPE
  			       && rettv->v_type == VAR_FUNC
  			       && var_check_func_name(key, lp->ll_di == NULL))
  			|| !valid_varname(key);
  		if (len != -1)
  		    key[len] = prevval;
  		if (wrong)
  		    return NULL;
  	    }
  
  	    if (lp->ll_di == NULL)
  	    {
  		/* Can't add "v:" variable. */
  		if (lp->ll_dict == &vimvardict)
  		{
  		    EMSG2(_(e_illvar), name);
  		    return NULL;
  		}
  
  		/* Key does not exist in dict: may need to add it. */
  		if (*p == '[' || *p == '.' || unlet)
  		{
  		    if (!quiet)
  			EMSG2(_(e_dictkey), key);
  		    if (len == -1)
  			clear_tv(&var1);
  		    return NULL;
  		}
  		if (len == -1)
  		    lp->ll_newkey = vim_strsave(key);
  		else
  		    lp->ll_newkey = vim_strnsave(key, len);
  		if (len == -1)
  		    clear_tv(&var1);
  		if (lp->ll_newkey == NULL)
  		    p = NULL;
  		break;
  	    }
  	    /* existing variable, need to check if it can be changed */
  	    else if (var_check_ro(lp->ll_di->di_flags, name, FALSE))
  		return NULL;
  
  	    if (len == -1)
  		clear_tv(&var1);
  	    lp->ll_tv = &lp->ll_di->di_tv;
  	}
  	else
  	{
  	    /*
  	     * Get the number and item for the only or first index of the List.
  	     */
  	    if (empty1)
  		lp->ll_n1 = 0;
  	    else
  	    {
  		lp->ll_n1 = get_tv_number(&var1);   /* is number or string */
  		clear_tv(&var1);
  	    }
  	    lp->ll_dict = NULL;
  	    lp->ll_list = lp->ll_tv->vval.v_list;
  	    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
  	    if (lp->ll_li == NULL)
  	    {
  		if (lp->ll_n1 < 0)
  		{
  		    lp->ll_n1 = 0;
  		    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
  		}
  	    }
  	    if (lp->ll_li == NULL)
  	    {
  		if (lp->ll_range && !lp->ll_empty2)
  		    clear_tv(&var2);
  		if (!quiet)
  		    EMSGN(_(e_listidx), lp->ll_n1);
  		return NULL;
  	    }
  
  	    /*
  	     * May need to find the item or absolute index for the second
  	     * index of a range.
  	     * When no index given: "lp->ll_empty2" is TRUE.
  	     * Otherwise "lp->ll_n2" is set to the second index.
  	     */
  	    if (lp->ll_range && !lp->ll_empty2)
  	    {
  		lp->ll_n2 = get_tv_number(&var2);   /* is number or string */
  		clear_tv(&var2);
  		if (lp->ll_n2 < 0)
  		{
  		    ni = list_find(lp->ll_list, lp->ll_n2);
  		    if (ni == NULL)
  		    {
  			if (!quiet)
  			    EMSGN(_(e_listidx), lp->ll_n2);
  			return NULL;
  		    }
  		    lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
  		}
  
  		/* Check that lp->ll_n2 isn't before lp->ll_n1. */
  		if (lp->ll_n1 < 0)
  		    lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
  		if (lp->ll_n2 < lp->ll_n1)
  		{
  		    if (!quiet)
  			EMSGN(_(e_listidx), lp->ll_n2);
  		    return NULL;
  		}
  	    }
  
  	    lp->ll_tv = &lp->ll_li->li_tv;
  	}
      }
  
      return p;
  }
  
  /*
   * Clear lval "lp" that was filled by get_lval().
   */
      static void
  clear_lval(lp)
      lval_T	*lp;
  {
      vim_free(lp->ll_exp_name);
      vim_free(lp->ll_newkey);
  }
  
  /*
   * Set a variable that was parsed by get_lval() to "rettv".
   * "endp" points to just after the parsed name.
   * "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
   */
      static void
  set_var_lval(lp, endp, rettv, copy, op)
      lval_T	*lp;
      char_u	*endp;
      typval_T	*rettv;
      int		copy;
      char_u	*op;
  {
      int		cc;
      listitem_T	*ri;
      dictitem_T	*di;
  
      if (lp->ll_tv == NULL)
      {
  	if (!check_changedtick(lp->ll_name))
  	{
  	    cc = *endp;
  	    *endp = NUL;
  	    if (op != NULL && *op != '=')
  	    {
  		typval_T tv;
  
  		/* handle +=, -= and .= */
  		di = NULL;
  		if (get_var_tv(lp->ll_name, (int)STRLEN(lp->ll_name),
  						 &tv, &di, TRUE, FALSE) == OK)
  		{
  		    if ((di == NULL
  			   || (!var_check_ro(di->di_flags, lp->ll_name, FALSE)
  			      && !tv_check_lock(di->di_tv.v_lock, lp->ll_name,
  								      FALSE)))
  			    && tv_op(&tv, rettv, op) == OK)
  			set_var(lp->ll_name, &tv, FALSE);
  		    clear_tv(&tv);
  		}
  	    }
  	    else
  		set_var(lp->ll_name, rettv, copy);
  	    *endp = cc;
  	}
      }
      else if (tv_check_lock(lp->ll_newkey == NULL
  		? lp->ll_tv->v_lock
  		: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name, FALSE))
  	;
      else if (lp->ll_range)
      {
  	listitem_T *ll_li = lp->ll_li;
  	int ll_n1 = lp->ll_n1;
  
  	/*
  	 * Check whether any of the list items is locked
  	 */
  	for (ri = rettv->vval.v_list->lv_first; ri != NULL && ll_li != NULL; )
  	{
  	    if (tv_check_lock(ll_li->li_tv.v_lock, lp->ll_name, FALSE))
  		return;
  	    ri = ri->li_next;
  	    if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == ll_n1))
  		break;
  	    ll_li = ll_li->li_next;
  	    ++ll_n1;
  	}
  
  	/*
  	 * Assign the List values to the list items.
  	 */
  	for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
  	{
  	    if (op != NULL && *op != '=')
  		tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
  	    else
  	    {
  		clear_tv(&lp->ll_li->li_tv);
  		copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
  	    }
  	    ri = ri->li_next;
  	    if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
  		break;
  	    if (lp->ll_li->li_next == NULL)
  	    {
  		/* Need to add an empty item. */
  		if (list_append_number(lp->ll_list, 0) == FAIL)
  		{
  		    ri = NULL;
  		    break;
  		}
  	    }
  	    lp->ll_li = lp->ll_li->li_next;
  	    ++lp->ll_n1;
  	}
  	if (ri != NULL)
  	    EMSG(_("E710: List value has more items than target"));
  	else if (lp->ll_empty2
  		? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
  		: lp->ll_n1 != lp->ll_n2)
  	    EMSG(_("E711: List value has not enough items"));
      }
      else
      {
  	/*
  	 * Assign to a List or Dictionary item.
  	 */
  	if (lp->ll_newkey != NULL)
  	{
  	    if (op != NULL && *op != '=')
  	    {
  		EMSG2(_(e_letwrong), op);
  		return;
  	    }
  
  	    /* Need to add an item to the Dictionary. */
  	    di = dictitem_alloc(lp->ll_newkey);
  	    if (di == NULL)
  		return;
  	    if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
  	    {
  		vim_free(di);
  		return;
  	    }
  	    lp->ll_tv = &di->di_tv;
  	}
  	else if (op != NULL && *op != '=')
  	{
  	    tv_op(lp->ll_tv, rettv, op);
  	    return;
  	}
  	else
  	    clear_tv(lp->ll_tv);
  
  	/*
  	 * Assign the value to the variable or list item.
  	 */
  	if (copy)
  	    copy_tv(rettv, lp->ll_tv);
  	else
  	{
  	    *lp->ll_tv = *rettv;
  	    lp->ll_tv->v_lock = 0;
  	    init_tv(rettv);
  	}
      }
  }
  
  /*
   * Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
   * Returns OK or FAIL.
   */
      static int
  tv_op(tv1, tv2, op)
      typval_T *tv1;
      typval_T *tv2;
      char_u  *op;
  {
      long	n;
      char_u	numbuf[NUMBUFLEN];
      char_u	*s;
  
      /* Can't do anything with a Funcref or a Dict on the right. */
      if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT)
      {
  	switch (tv1->v_type)
  	{
  	    case VAR_DICT:
  	    case VAR_FUNC:
  		break;
  
  	    case VAR_LIST:
  		if (*op != '+' || tv2->v_type != VAR_LIST)
  		    break;
  		/* List += List */
  		if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
  		    list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
  		return OK;
  
  	    case VAR_NUMBER:
  	    case VAR_STRING:
  		if (tv2->v_type == VAR_LIST)
  		    break;
  		if (*op == '+' || *op == '-')
  		{
  		    /* nr += nr  or  nr -= nr*/
  		    n = get_tv_number(tv1);
  #ifdef FEAT_FLOAT
  		    if (tv2->v_type == VAR_FLOAT)
  		    {
  			float_T f = n;
  
  			if (*op == '+')
  			    f += tv2->vval.v_float;
  			else
  			    f -= tv2->vval.v_float;
  			clear_tv(tv1);
  			tv1->v_type = VAR_FLOAT;
  			tv1->vval.v_float = f;
  		    }
  		    else
  #endif
  		    {
  			if (*op == '+')
  			    n += get_tv_number(tv2);
  			else
  			    n -= get_tv_number(tv2);
  			clear_tv(tv1);
  			tv1->v_type = VAR_NUMBER;
  			tv1->vval.v_number = n;
  		    }
  		}
  		else
  		{
  		    if (tv2->v_type == VAR_FLOAT)
  			break;
  
  		    /* str .= str */
  		    s = get_tv_string(tv1);
  		    s = concat_str(s, get_tv_string_buf(tv2, numbuf));
  		    clear_tv(tv1);
  		    tv1->v_type = VAR_STRING;
  		    tv1->vval.v_string = s;
  		}
  		return OK;
  
  #ifdef FEAT_FLOAT
  	    case VAR_FLOAT:
  		{
  		    float_T f;
  
  		    if (*op == '.' || (tv2->v_type != VAR_FLOAT
  				    && tv2->v_type != VAR_NUMBER
  				    && tv2->v_type != VAR_STRING))
  			break;
  		    if (tv2->v_type == VAR_FLOAT)
  			f = tv2->vval.v_float;
  		    else
  			f = get_tv_number(tv2);
  		    if (*op == '+')
  			tv1->vval.v_float += f;
  		    else
  			tv1->vval.v_float -= f;
  		}
  		return OK;
  #endif
  	}
      }
  
      EMSG2(_(e_letwrong), op);
      return FAIL;
  }
  
  /*
   * Add a watcher to a list.
   */
      void
  list_add_watch(l, lw)
      list_T	*l;
      listwatch_T	*lw;
  {
      lw->lw_next = l->lv_watch;
      l->lv_watch = lw;
  }
  
  /*
   * Remove a watcher from a list.
   * No warning when it isn't found...
   */
      void
  list_rem_watch(l, lwrem)
      list_T	*l;
      listwatch_T	*lwrem;
  {
      listwatch_T	*lw, **lwp;
  
      lwp = &l->lv_watch;
      for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
      {
  	if (lw == lwrem)
  	{
  	    *lwp = lw->lw_next;
  	    break;
  	}
  	lwp = &lw->lw_next;
      }
  }
  
  /*
   * Just before removing an item from a list: advance watchers to the next
   * item.
   */
      static void
  list_fix_watch(l, item)
      list_T	*l;
      listitem_T	*item;
  {
      listwatch_T	*lw;
  
      for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
  	if (lw->lw_item == item)
  	    lw->lw_item = item->li_next;
  }
  
  /*
   * Evaluate the expression used in a ":for var in expr" command.
   * "arg" points to "var".
   * Set "*errp" to TRUE for an error, FALSE otherwise;
   * Return a pointer that holds the info.  Null when there is an error.
   */
      void *
  eval_for_line(arg, errp, nextcmdp, skip)
      char_u	*arg;
      int		*errp;
      char_u	**nextcmdp;
      int		skip;
  {
      forinfo_T	*fi;
      char_u	*expr;
      typval_T	tv;
      list_T	*l;
  
      *errp = TRUE;	/* default: there is an error */
  
      fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
      if (fi == NULL)
  	return NULL;
  
      expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
      if (expr == NULL)
  	return fi;
  
      expr = skipwhite(expr);
      if (expr[0] != 'i' || expr[1] != 'n' || !vim_iswhite(expr[2]))
      {
  	EMSG(_("E690: Missing \"in\" after :for"));
  	return fi;
      }
  
      if (skip)
  	++emsg_skip;
      if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
      {
  	*errp = FALSE;
  	if (!skip)
  	{
  	    l = tv.vval.v_list;
  	    if (tv.v_type != VAR_LIST || l == NULL)
  	    {
  		EMSG(_(e_listreq));
  		clear_tv(&tv);
  	    }
  	    else
  	    {
  		/* No need to increment the refcount, it's already set for the
  		 * list being used in "tv". */
  		fi->fi_list = l;
  		list_add_watch(l, &fi->fi_lw);
  		fi->fi_lw.lw_item = l->lv_first;
  	    }
  	}
      }
      if (skip)
  	--emsg_skip;
  
      return fi;
  }
  
  /*
   * Use the first item in a ":for" list.  Advance to the next.
   * Assign the values to the variable (list).  "arg" points to the first one.
   * Return TRUE when a valid item was found, FALSE when at end of list or
   * something wrong.
   */
      int
  next_for_item(fi_void, arg)
      void	*fi_void;
      char_u	*arg;
  {
      forinfo_T	*fi = (forinfo_T *)fi_void;
      int		result;
      listitem_T	*item;
  
      item = fi->fi_lw.lw_item;
      if (item == NULL)
  	result = FALSE;
      else
      {
  	fi->fi_lw.lw_item = item->li_next;
  	result = (ex_let_vars(arg, &item->li_tv, TRUE,
  			      fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
      }
      return result;
  }
  
  /*
   * Free the structure used to store info used by ":for".
   */
      void
  free_for_info(fi_void)
      void *fi_void;
  {
      forinfo_T    *fi = (forinfo_T *)fi_void;
  
      if (fi != NULL && fi->fi_list != NULL)
      {
  	list_rem_watch(fi->fi_list, &fi->fi_lw);
  	list_unref(fi->fi_list);
      }
      vim_free(fi);
  }
  
  #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
  
      void
  set_context_for_expression(xp, arg, cmdidx)
      expand_T	*xp;
      char_u	*arg;
      cmdidx_T	cmdidx;
  {
      int		got_eq = FALSE;
      int		c;
      char_u	*p;
  
      if (cmdidx == CMD_let)
      {
  	xp->xp_context = EXPAND_USER_VARS;
  	if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
  	{
  	    /* ":let var1 var2 ...": find last space. */
  	    for (p = arg + STRLEN(arg); p >= arg; )
  	    {
  		xp->xp_pattern = p;
  		mb_ptr_back(arg, p);
  		if (vim_iswhite(*p))
  		    break;
  	    }
  	    return;
  	}
      }
      else
  	xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
  							  : EXPAND_EXPRESSION;
      while ((xp->xp_pattern = vim_strpbrk(arg,
  				  (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
      {
  	c = *xp->xp_pattern;
  	if (c == '&')
  	{
  	    c = xp->xp_pattern[1];
  	    if (c == '&')
  	    {
  		++xp->xp_pattern;
  		xp->xp_context = cmdidx != CMD_let || got_eq
  					 ? EXPAND_EXPRESSION : EXPAND_NOTHING;
  	    }
  	    else if (c != ' ')
  	    {
  		xp->xp_context = EXPAND_SETTINGS;
  		if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
  		    xp->xp_pattern += 2;
  
  	    }
  	}
  	else if (c == '$')
  	{
  	    /* environment variable */
  	    xp->xp_context = EXPAND_ENV_VARS;
  	}
  	else if (c == '=')
  	{
  	    got_eq = TRUE;
  	    xp->xp_context = EXPAND_EXPRESSION;
  	}
  	else if ((c == '<' || c == '#')
  		&& xp->xp_context == EXPAND_FUNCTIONS
  		&& vim_strchr(xp->xp_pattern, '(') == NULL)
  	{
  	    /* Function name can start with "<SNR>" and contain '#'. */
  	    break;
  	}
  	else if (cmdidx != CMD_let || got_eq)
  	{
  	    if (c == '"')	    /* string */
  	    {
  		while ((c = *++xp->xp_pattern) != NUL && c != '"')
  		    if (c == '\\' && xp->xp_pattern[1] != NUL)
  			++xp->xp_pattern;
  		xp->xp_context = EXPAND_NOTHING;
  	    }
  	    else if (c == '\'')	    /* literal string */
  	    {
  		/* Trick: '' is like stopping and starting a literal string. */
  		while ((c = *++xp->xp_pattern) != NUL && c != '\'')
  		    /* skip */ ;
  		xp->xp_context = EXPAND_NOTHING;
  	    }
  	    else if (c == '|')
  	    {
  		if (xp->xp_pattern[1] == '|')
  		{
  		    ++xp->xp_pattern;
  		    xp->xp_context = EXPAND_EXPRESSION;
  		}
  		else
  		    xp->xp_context = EXPAND_COMMANDS;
  	    }
  	    else
  		xp->xp_context = EXPAND_EXPRESSION;
  	}
  	else
  	    /* Doesn't look like something valid, expand as an expression
  	     * anyway. */
  	    xp->xp_context = EXPAND_EXPRESSION;
  	arg = xp->xp_pattern;
  	if (*arg != NUL)
  	    while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
  		/* skip */ ;
      }
      xp->xp_pattern = arg;
  }
  
  #endif /* FEAT_CMDL_COMPL */
  
  /*
   * ":1,25call func(arg1, arg2)"	function call.
   */
      void
  ex_call(eap)
      exarg_T	*eap;
  {
      char_u	*arg = eap->arg;
      char_u	*startarg;
      char_u	*name;
      char_u	*tofree;
      int		len;
      typval_T	rettv;
      linenr_T	lnum;
      int		doesrange;
      int		failed = FALSE;
      funcdict_T	fudi;
  
      if (eap->skip)
      {
  	/* trans_function_name() doesn't work well when skipping, use eval0()
  	 * instead to skip to any following command, e.g. for:
  	 *   :if 0 | call dict.foo().bar() | endif  */
  	++emsg_skip;
  	if (eval0(eap->arg, &rettv, &eap->nextcmd, FALSE) != FAIL)
  	    clear_tv(&rettv);
  	--emsg_skip;
  	return;
      }
  
      tofree = trans_function_name(&arg, eap->skip, TFN_INT, &fudi);
      if (fudi.fd_newkey != NULL)
      {
  	/* Still need to give an error message for missing key. */
  	EMSG2(_(e_dictkey), fudi.fd_newkey);
  	vim_free(fudi.fd_newkey);
      }
      if (tofree == NULL)
  	return;
  
      /* Increase refcount on dictionary, it could get deleted when evaluating
       * the arguments. */
      if (fudi.fd_dict != NULL)
  	++fudi.fd_dict->dv_refcount;
  
      /* If it is the name of a variable of type VAR_FUNC use its contents. */
      len = (int)STRLEN(tofree);
      name = deref_func_name(tofree, &len, FALSE);
  
      /* Skip white space to allow ":call func ()".  Not good, but required for
       * backward compatibility. */
      startarg = skipwhite(arg);
      rettv.v_type = VAR_UNKNOWN;	/* clear_tv() uses this */
  
      if (*startarg != '(')
      {
  	EMSG2(_("E107: Missing parentheses: %s"), eap->arg);
  	goto end;
      }
  
      /*
       * When skipping, evaluate the function once, to find the end of the
       * arguments.
       * When the function takes a range, this is discovered after the first
       * call, and the loop is broken.
       */
      if (eap->skip)
      {
  	++emsg_skip;
  	lnum = eap->line2;	/* do it once, also with an invalid range */
      }
      else
  	lnum = eap->line1;
      for ( ; lnum <= eap->line2; ++lnum)
      {
  	if (!eap->skip && eap->addr_count > 0)
  	{
  	    curwin->w_cursor.lnum = lnum;
  	    curwin->w_cursor.col = 0;
  #ifdef FEAT_VIRTUALEDIT
  	    curwin->w_cursor.coladd = 0;
  #endif
  	}
  	arg = startarg;
  	if (get_func_tv(name, (int)STRLEN(name), &rettv, &arg,
  		    eap->line1, eap->line2, &doesrange,
  					    !eap->skip, fudi.fd_dict) == FAIL)
  	{
  	    failed = TRUE;
  	    break;
  	}
  
  	/* Handle a function returning a Funcref, Dictionary or List. */
  	if (handle_subscript(&arg, &rettv, !eap->skip, TRUE) == FAIL)
  	{
  	    failed = TRUE;
  	    break;
  	}
  
  	clear_tv(&rettv);
  	if (doesrange || eap->skip)
  	    break;
  
  	/* Stop when immediately aborting on error, or when an interrupt
  	 * occurred or an exception was thrown but not caught.
  	 * get_func_tv() returned OK, so that the check for trailing
  	 * characters below is executed. */
  	if (aborting())
  	    break;
      }
      if (eap->skip)
  	--emsg_skip;
  
      if (!failed)
      {
  	/* Check for trailing illegal characters and a following command. */
  	if (!ends_excmd(*arg))
  	{
  	    emsg_severe = TRUE;
  	    EMSG(_(e_trailing));
  	}
  	else
  	    eap->nextcmd = check_nextcmd(arg);
      }
  
  end:
      dict_unref(fudi.fd_dict);
      vim_free(tofree);
  }
  
  /*
   * ":unlet[!] var1 ... " command.
   */
      void
  ex_unlet(eap)
      exarg_T	*eap;
  {
      ex_unletlock(eap, eap->arg, 0);
  }
  
  /*
   * ":lockvar" and ":unlockvar" commands
   */
      void
  ex_lockvar(eap)
      exarg_T	*eap;
  {
      char_u	*arg = eap->arg;
      int		deep = 2;
  
      if (eap->forceit)
  	deep = -1;
      else if (vim_isdigit(*arg))
      {
  	deep = getdigits(&arg);
  	arg = skipwhite(arg);
      }
  
      ex_unletlock(eap, arg, deep);
  }
  
  /*
   * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
   */
      static void
  ex_unletlock(eap, argstart, deep)
      exarg_T	*eap;
      char_u	*argstart;
      int		deep;
  {
      char_u	*arg = argstart;
      char_u	*name_end;
      int		error = FALSE;
      lval_T	lv;
  
      do
      {
  	/* Parse the name and find the end. */
  	name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, 0,
  							     FNE_CHECK_START);
  	if (lv.ll_name == NULL)
  	    error = TRUE;	    /* error but continue parsing */
  	if (name_end == NULL || (!vim_iswhite(*name_end)
  						   && !ends_excmd(*name_end)))
  	{
  	    if (name_end != NULL)
  	    {
  		emsg_severe = TRUE;
  		EMSG(_(e_trailing));
  	    }
  	    if (!(eap->skip || error))
  		clear_lval(&lv);
  	    break;
  	}
  
  	if (!error && !eap->skip)
  	{
  	    if (eap->cmdidx == CMD_unlet)
  	    {
  		if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
  		    error = TRUE;
  	    }
  	    else
  	    {
  		if (do_lock_var(&lv, name_end, deep,
  					  eap->cmdidx == CMD_lockvar) == FAIL)
  		    error = TRUE;
  	    }
  	}
  
  	if (!eap->skip)
  	    clear_lval(&lv);
  
  	arg = skipwhite(name_end);
      } while (!ends_excmd(*arg));
  
      eap->nextcmd = check_nextcmd(arg);
  }
  
      static int
  do_unlet_var(lp, name_end, forceit)
      lval_T	*lp;
      char_u	*name_end;
      int		forceit;
  {
      int		ret = OK;
      int		cc;
  
      if (lp->ll_tv == NULL)
      {
  	cc = *name_end;
  	*name_end = NUL;
  
  	/* Normal name or expanded name. */
  	if (check_changedtick(lp->ll_name))
  	    ret = FAIL;
  	else if (do_unlet(lp->ll_name, forceit) == FAIL)
  	    ret = FAIL;
  	*name_end = cc;
      }
      else if ((lp->ll_list != NULL
  		   && tv_check_lock(lp->ll_list->lv_lock, lp->ll_name, FALSE))
  	    || (lp->ll_dict != NULL
  		  && tv_check_lock(lp->ll_dict->dv_lock, lp->ll_name, FALSE)))
  	return FAIL;
      else if (lp->ll_range)
      {
  	listitem_T    *li;
  	listitem_T    *ll_li = lp->ll_li;
  	int           ll_n1 = lp->ll_n1;
  
  	while (ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= ll_n1))
  	{
  	    li = ll_li->li_next;
  	    if (tv_check_lock(ll_li->li_tv.v_lock, lp->ll_name, FALSE))
  		return FAIL;
  	    ll_li = li;
  	    ++ll_n1;
  	}
  
  	/* Delete a range of List items. */
  	while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
  	{
  	    li = lp->ll_li->li_next;
  	    listitem_remove(lp->ll_list, lp->ll_li);
  	    lp->ll_li = li;
  	    ++lp->ll_n1;
  	}
      }
      else
      {
  	if (lp->ll_list != NULL)
  	    /* unlet a List item. */
  	    listitem_remove(lp->ll_list, lp->ll_li);
  	else
  	    /* unlet a Dictionary item. */
  	    dictitem_remove(lp->ll_dict, lp->ll_di);
      }
  
      return ret;
  }
  
  /*
   * "unlet" a variable.  Return OK if it existed, FAIL if not.
   * When "forceit" is TRUE don't complain if the variable doesn't exist.
   */
      int
  do_unlet(name, forceit)
      char_u	*name;
      int		forceit;
  {
      hashtab_T	*ht;
      hashitem_T	*hi;
      char_u	*varname;
      dict_T	*d;
      dictitem_T	*di;
  
      ht = find_var_ht(name, &varname);
      if (ht != NULL && *varname != NUL)
      {
  	if (ht == &globvarht)
  	    d = &globvardict;
  	else if (current_funccal != NULL
  				 && ht == &current_funccal->l_vars.dv_hashtab)
  	    d = &current_funccal->l_vars;
  	else
  	{
  	    di = find_var_in_ht(ht, *name, (char_u *)"", FALSE);
  	    d = di->di_tv.vval.v_dict;
  	}
  	hi = hash_find(ht, varname);
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    di = HI2DI(hi);
  	    if (var_check_fixed(di->di_flags, name, FALSE)
  		    || var_check_ro(di->di_flags, name, FALSE)
  		    || tv_check_lock(d->dv_lock, name, FALSE))
  		return FAIL;
  	    delete_var(ht, hi);
  	    return OK;
  	}
      }
      if (forceit)
  	return OK;
      EMSG2(_("E108: No such variable: \"%s\""), name);
      return FAIL;
  }
  
  /*
   * Lock or unlock variable indicated by "lp".
   * "deep" is the levels to go (-1 for unlimited);
   * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
   */
      static int
  do_lock_var(lp, name_end, deep, lock)
      lval_T	*lp;
      char_u	*name_end;
      int		deep;
      int		lock;
  {
      int		ret = OK;
      int		cc;
      dictitem_T	*di;
  
      if (deep == 0)	/* nothing to do */
  	return OK;
  
      if (lp->ll_tv == NULL)
      {
  	cc = *name_end;
  	*name_end = NUL;
  
  	/* Normal name or expanded name. */
  	if (check_changedtick(lp->ll_name))
  	    ret = FAIL;
  	else
  	{
  	    di = find_var(lp->ll_name, NULL, TRUE);
  	    if (di == NULL)
  		ret = FAIL;
  	    else
  	    {
  		if (lock)
  		    di->di_flags |= DI_FLAGS_LOCK;
  		else
  		    di->di_flags &= ~DI_FLAGS_LOCK;
  		item_lock(&di->di_tv, deep, lock);
  	    }
  	}
  	*name_end = cc;
      }
      else if (lp->ll_range)
      {
  	listitem_T    *li = lp->ll_li;
  
  	/* (un)lock a range of List items. */
  	while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
  	{
  	    item_lock(&li->li_tv, deep, lock);
  	    li = li->li_next;
  	    ++lp->ll_n1;
  	}
      }
      else if (lp->ll_list != NULL)
  	/* (un)lock a List item. */
  	item_lock(&lp->ll_li->li_tv, deep, lock);
      else
  	/* (un)lock a Dictionary item. */
  	item_lock(&lp->ll_di->di_tv, deep, lock);
  
      return ret;
  }
  
  /*
   * Lock or unlock an item.  "deep" is nr of levels to go.
   */
      static void
  item_lock(tv, deep, lock)
      typval_T	*tv;
      int		deep;
      int		lock;
  {
      static int	recurse = 0;
      list_T	*l;
      listitem_T	*li;
      dict_T	*d;
      hashitem_T	*hi;
      int		todo;
  
      if (recurse >= DICT_MAXNEST)
      {
  	EMSG(_("E743: variable nested too deep for (un)lock"));
  	return;
      }
      if (deep == 0)
  	return;
      ++recurse;
  
      /* lock/unlock the item itself */
      if (lock)
  	tv->v_lock |= VAR_LOCKED;
      else
  	tv->v_lock &= ~VAR_LOCKED;
  
      switch (tv->v_type)
      {
  	case VAR_LIST:
  	    if ((l = tv->vval.v_list) != NULL)
  	    {
  		if (lock)
  		    l->lv_lock |= VAR_LOCKED;
  		else
  		    l->lv_lock &= ~VAR_LOCKED;
  		if (deep < 0 || deep > 1)
  		    /* recursive: lock/unlock the items the List contains */
  		    for (li = l->lv_first; li != NULL; li = li->li_next)
  			item_lock(&li->li_tv, deep - 1, lock);
  	    }
  	    break;
  	case VAR_DICT:
  	    if ((d = tv->vval.v_dict) != NULL)
  	    {
  		if (lock)
  		    d->dv_lock |= VAR_LOCKED;
  		else
  		    d->dv_lock &= ~VAR_LOCKED;
  		if (deep < 0 || deep > 1)
  		{
  		    /* recursive: lock/unlock the items the List contains */
  		    todo = (int)d->dv_hashtab.ht_used;
  		    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
  		    {
  			if (!HASHITEM_EMPTY(hi))
  			{
  			    --todo;
  			    item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
  			}
  		    }
  		}
  	    }
      }
      --recurse;
  }
  
  /*
   * Return TRUE if typeval "tv" is locked: Either that value is locked itself
   * or it refers to a List or Dictionary that is locked.
   */
      static int
  tv_islocked(tv)
      typval_T	*tv;
  {
      return (tv->v_lock & VAR_LOCKED)
  	|| (tv->v_type == VAR_LIST
  		&& tv->vval.v_list != NULL
  		&& (tv->vval.v_list->lv_lock & VAR_LOCKED))
  	|| (tv->v_type == VAR_DICT
  		&& tv->vval.v_dict != NULL
  		&& (tv->vval.v_dict->dv_lock & VAR_LOCKED));
  }
  
  #if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
  /*
   * Delete all "menutrans_" variables.
   */
      void
  del_menutrans_vars()
  {
      hashitem_T	*hi;
      int		todo;
  
      hash_lock(&globvarht);
      todo = (int)globvarht.ht_used;
      for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
      {
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    --todo;
  	    if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
  		delete_var(&globvarht, hi);
  	}
      }
      hash_unlock(&globvarht);
  }
  #endif
  
  #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
  
  /*
   * Local string buffer for the next two functions to store a variable name
   * with its prefix. Allocated in cat_prefix_varname(), freed later in
   * get_user_var_name().
   */
  
  static char_u *cat_prefix_varname __ARGS((int prefix, char_u *name));
  
  static char_u	*varnamebuf = NULL;
  static int	varnamebuflen = 0;
  
  /*
   * Function to concatenate a prefix and a variable name.
   */
      static char_u *
  cat_prefix_varname(prefix, name)
      int		prefix;
      char_u	*name;
  {
      int		len;
  
      len = (int)STRLEN(name) + 3;
      if (len > varnamebuflen)
      {
  	vim_free(varnamebuf);
  	len += 10;			/* some additional space */
  	varnamebuf = alloc(len);
  	if (varnamebuf == NULL)
  	{
  	    varnamebuflen = 0;
  	    return NULL;
  	}
  	varnamebuflen = len;
      }
      *varnamebuf = prefix;
      varnamebuf[1] = ':';
      STRCPY(varnamebuf + 2, name);
      return varnamebuf;
  }
  
  /*
   * Function given to ExpandGeneric() to obtain the list of user defined
   * (global/buffer/window/built-in) variable names.
   */
      char_u *
  get_user_var_name(xp, idx)
      expand_T	*xp;
      int		idx;
  {
      static long_u	gdone;
      static long_u	bdone;
      static long_u	wdone;
  #ifdef FEAT_WINDOWS
      static long_u	tdone;
  #endif
      static int		vidx;
      static hashitem_T	*hi;
      hashtab_T		*ht;
  
      if (idx == 0)
      {
  	gdone = bdone = wdone = vidx = 0;
  #ifdef FEAT_WINDOWS
  	tdone = 0;
  #endif
      }
  
      /* Global variables */
      if (gdone < globvarht.ht_used)
      {
  	if (gdone++ == 0)
  	    hi = globvarht.ht_array;
  	else
  	    ++hi;
  	while (HASHITEM_EMPTY(hi))
  	    ++hi;
  	if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
  	    return cat_prefix_varname('g', hi->hi_key);
  	return hi->hi_key;
      }
  
      /* b: variables */
      ht = &curbuf->b_vars->dv_hashtab;
      if (bdone < ht->ht_used)
      {
  	if (bdone++ == 0)
  	    hi = ht->ht_array;
  	else
  	    ++hi;
  	while (HASHITEM_EMPTY(hi))
  	    ++hi;
  	return cat_prefix_varname('b', hi->hi_key);
      }
      if (bdone == ht->ht_used)
      {
  	++bdone;
  	return (char_u *)"b:changedtick";
      }
  
      /* w: variables */
      ht = &curwin->w_vars->dv_hashtab;
      if (wdone < ht->ht_used)
      {
  	if (wdone++ == 0)
  	    hi = ht->ht_array;
  	else
  	    ++hi;
  	while (HASHITEM_EMPTY(hi))
  	    ++hi;
  	return cat_prefix_varname('w', hi->hi_key);
      }
  
  #ifdef FEAT_WINDOWS
      /* t: variables */
      ht = &curtab->tp_vars->dv_hashtab;
      if (tdone < ht->ht_used)
      {
  	if (tdone++ == 0)
  	    hi = ht->ht_array;
  	else
  	    ++hi;
  	while (HASHITEM_EMPTY(hi))
  	    ++hi;
  	return cat_prefix_varname('t', hi->hi_key);
      }
  #endif
  
      /* v: variables */
      if (vidx < VV_LEN)
  	return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
  
      vim_free(varnamebuf);
      varnamebuf = NULL;
      varnamebuflen = 0;
      return NULL;
  }
  
  #endif /* FEAT_CMDL_COMPL */
  
  /*
   * types for expressions.
   */
  typedef enum
  {
      TYPE_UNKNOWN = 0
      , TYPE_EQUAL	/* == */
      , TYPE_NEQUAL	/* != */
      , TYPE_GREATER	/* >  */
      , TYPE_GEQUAL	/* >= */
      , TYPE_SMALLER	/* <  */
      , TYPE_SEQUAL	/* <= */
      , TYPE_MATCH	/* =~ */
      , TYPE_NOMATCH	/* !~ */
  } exptype_T;
  
  /*
   * The "evaluate" argument: When FALSE, the argument is only parsed but not
   * executed.  The function may return OK, but the rettv will be of type
   * VAR_UNKNOWN.  The function still returns FAIL for a syntax error.
   */
  
  /*
   * Handle zero level expression.
   * This calls eval1() and handles error message and nextcmd.
   * Put the result in "rettv" when returning OK and "evaluate" is TRUE.
   * Note: "rettv.v_lock" is not set.
   * Return OK or FAIL.
   */
      static int
  eval0(arg, rettv, nextcmd, evaluate)
      char_u	*arg;
      typval_T	*rettv;
      char_u	**nextcmd;
      int		evaluate;
  {
      int		ret;
      char_u	*p;
  
      p = skipwhite(arg);
      ret = eval1(&p, rettv, evaluate);
      if (ret == FAIL || !ends_excmd(*p))
      {
  	if (ret != FAIL)
  	    clear_tv(rettv);
  	/*
  	 * Report the invalid expression unless the expression evaluation has
  	 * been cancelled due to an aborting error, an interrupt, or an
  	 * exception.
  	 */
  	if (!aborting())
  	    EMSG2(_(e_invexpr2), arg);
  	ret = FAIL;
      }
      if (nextcmd != NULL)
  	*nextcmd = check_nextcmd(p);
  
      return ret;
  }
  
  /*
   * Handle top level expression:
   *	expr2 ? expr1 : expr1
   *
   * "arg" must point to the first non-white of the expression.
   * "arg" is advanced to the next non-white after the recognized expression.
   *
   * Note: "rettv.v_lock" is not set.
   *
   * Return OK or FAIL.
   */
      static int
  eval1(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
  {
      int		result;
      typval_T	var2;
  
      /*
       * Get the first variable.
       */
      if (eval2(arg, rettv, evaluate) == FAIL)
  	return FAIL;
  
      if ((*arg)[0] == '?')
      {
  	result = FALSE;
  	if (evaluate)
  	{
  	    int		error = FALSE;
  
  	    if (get_tv_number_chk(rettv, &error) != 0)
  		result = TRUE;
  	    clear_tv(rettv);
  	    if (error)
  		return FAIL;
  	}
  
  	/*
  	 * Get the second variable.
  	 */
  	*arg = skipwhite(*arg + 1);
  	if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
  	    return FAIL;
  
  	/*
  	 * Check for the ":".
  	 */
  	if ((*arg)[0] != ':')
  	{
  	    EMSG(_("E109: Missing ':' after '?'"));
  	    if (evaluate && result)
  		clear_tv(rettv);
  	    return FAIL;
  	}
  
  	/*
  	 * Get the third variable.
  	 */
  	*arg = skipwhite(*arg + 1);
  	if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
  	{
  	    if (evaluate && result)
  		clear_tv(rettv);
  	    return FAIL;
  	}
  	if (evaluate && !result)
  	    *rettv = var2;
      }
  
      return OK;
  }
  
  /*
   * Handle first level expression:
   *	expr2 || expr2 || expr2	    logical OR
   *
   * "arg" must point to the first non-white of the expression.
   * "arg" is advanced to the next non-white after the recognized expression.
   *
   * Return OK or FAIL.
   */
      static int
  eval2(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
  {
      typval_T	var2;
      long	result;
      int		first;
      int		error = FALSE;
  
      /*
       * Get the first variable.
       */
      if (eval3(arg, rettv, evaluate) == FAIL)
  	return FAIL;
  
      /*
       * Repeat until there is no following "||".
       */
      first = TRUE;
      result = FALSE;
      while ((*arg)[0] == '|' && (*arg)[1] == '|')
      {
  	if (evaluate && first)
  	{
  	    if (get_tv_number_chk(rettv, &error) != 0)
  		result = TRUE;
  	    clear_tv(rettv);
  	    if (error)
  		return FAIL;
  	    first = FALSE;
  	}
  
  	/*
  	 * Get the second variable.
  	 */
  	*arg = skipwhite(*arg + 2);
  	if (eval3(arg, &var2, evaluate && !result) == FAIL)
  	    return FAIL;
  
  	/*
  	 * Compute the result.
  	 */
  	if (evaluate && !result)
  	{
  	    if (get_tv_number_chk(&var2, &error) != 0)
  		result = TRUE;
  	    clear_tv(&var2);
  	    if (error)
  		return FAIL;
  	}
  	if (evaluate)
  	{
  	    rettv->v_type = VAR_NUMBER;
  	    rettv->vval.v_number = result;
  	}
      }
  
      return OK;
  }
  
  /*
   * Handle second level expression:
   *	expr3 && expr3 && expr3	    logical AND
   *
   * "arg" must point to the first non-white of the expression.
   * "arg" is advanced to the next non-white after the recognized expression.
   *
   * Return OK or FAIL.
   */
      static int
  eval3(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
  {
      typval_T	var2;
      long	result;
      int		first;
      int		error = FALSE;
  
      /*
       * Get the first variable.
       */
      if (eval4(arg, rettv, evaluate) == FAIL)
  	return FAIL;
  
      /*
       * Repeat until there is no following "&&".
       */
      first = TRUE;
      result = TRUE;
      while ((*arg)[0] == '&' && (*arg)[1] == '&')
      {
  	if (evaluate && first)
  	{
  	    if (get_tv_number_chk(rettv, &error) == 0)
  		result = FALSE;
  	    clear_tv(rettv);
  	    if (error)
  		return FAIL;
  	    first = FALSE;
  	}
  
  	/*
  	 * Get the second variable.
  	 */
  	*arg = skipwhite(*arg + 2);
  	if (eval4(arg, &var2, evaluate && result) == FAIL)
  	    return FAIL;
  
  	/*
  	 * Compute the result.
  	 */
  	if (evaluate && result)
  	{
  	    if (get_tv_number_chk(&var2, &error) == 0)
  		result = FALSE;
  	    clear_tv(&var2);
  	    if (error)
  		return FAIL;
  	}
  	if (evaluate)
  	{
  	    rettv->v_type = VAR_NUMBER;
  	    rettv->vval.v_number = result;
  	}
      }
  
      return OK;
  }
  
  /*
   * Handle third level expression:
   *	var1 == var2
   *	var1 =~ var2
   *	var1 != var2
   *	var1 !~ var2
   *	var1 > var2
   *	var1 >= var2
   *	var1 < var2
   *	var1 <= var2
   *	var1 is var2
   *	var1 isnot var2
   *
   * "arg" must point to the first non-white of the expression.
   * "arg" is advanced to the next non-white after the recognized expression.
   *
   * Return OK or FAIL.
   */
      static int
  eval4(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
  {
      typval_T	var2;
      char_u	*p;
      int		i;
      exptype_T	type = TYPE_UNKNOWN;
      int		type_is = FALSE;    /* TRUE for "is" and "isnot" */
      int		len = 2;
      long	n1, n2;
      char_u	*s1, *s2;
      char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
      regmatch_T	regmatch;
      int		ic;
      char_u	*save_cpo;
  
      /*
       * Get the first variable.
       */
      if (eval5(arg, rettv, evaluate) == FAIL)
  	return FAIL;
  
      p = *arg;
      switch (p[0])
      {
  	case '=':   if (p[1] == '=')
  			type = TYPE_EQUAL;
  		    else if (p[1] == '~')
  			type = TYPE_MATCH;
  		    break;
  	case '!':   if (p[1] == '=')
  			type = TYPE_NEQUAL;
  		    else if (p[1] == '~')
  			type = TYPE_NOMATCH;
  		    break;
  	case '>':   if (p[1] != '=')
  		    {
  			type = TYPE_GREATER;
  			len = 1;
  		    }
  		    else
  			type = TYPE_GEQUAL;
  		    break;
  	case '<':   if (p[1] != '=')
  		    {
  			type = TYPE_SMALLER;
  			len = 1;
  		    }
  		    else
  			type = TYPE_SEQUAL;
  		    break;
  	case 'i':   if (p[1] == 's')
  		    {
  			if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
  			    len = 5;
  			if (!vim_isIDc(p[len]))
  			{
  			    type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
  			    type_is = TRUE;
  			}
  		    }
  		    break;
      }
  
      /*
       * If there is a comparative operator, use it.
       */
      if (type != TYPE_UNKNOWN)
      {
  	/* extra question mark appended: ignore case */
  	if (p[len] == '?')
  	{
  	    ic = TRUE;
  	    ++len;
  	}
  	/* extra '#' appended: match case */
  	else if (p[len] == '#')
  	{
  	    ic = FALSE;
  	    ++len;
  	}
  	/* nothing appended: use 'ignorecase' */
  	else
  	    ic = p_ic;
  
  	/*
  	 * Get the second variable.
  	 */
  	*arg = skipwhite(p + len);
  	if (eval5(arg, &var2, evaluate) == FAIL)
  	{
  	    clear_tv(rettv);
  	    return FAIL;
  	}
  
  	if (evaluate)
  	{
  	    if (type_is && rettv->v_type != var2.v_type)
  	    {
  		/* For "is" a different type always means FALSE, for "notis"
  		 * it means TRUE. */
  		n1 = (type == TYPE_NEQUAL);
  	    }
  	    else if (rettv->v_type == VAR_LIST || var2.v_type == VAR_LIST)
  	    {
  		if (type_is)
  		{
  		    n1 = (rettv->v_type == var2.v_type
  				   && rettv->vval.v_list == var2.vval.v_list);
  		    if (type == TYPE_NEQUAL)
  			n1 = !n1;
  		}
  		else if (rettv->v_type != var2.v_type
  			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
  		{
  		    if (rettv->v_type != var2.v_type)
  			EMSG(_("E691: Can only compare List with List"));
  		    else
  			EMSG(_("E692: Invalid operation for List"));
  		    clear_tv(rettv);
  		    clear_tv(&var2);
  		    return FAIL;
  		}
  		else
  		{
  		    /* Compare two Lists for being equal or unequal. */
  		    n1 = list_equal(rettv->vval.v_list, var2.vval.v_list,
  								   ic, FALSE);
  		    if (type == TYPE_NEQUAL)
  			n1 = !n1;
  		}
  	    }
  
  	    else if (rettv->v_type == VAR_DICT || var2.v_type == VAR_DICT)
  	    {
  		if (type_is)
  		{
  		    n1 = (rettv->v_type == var2.v_type
  				   && rettv->vval.v_dict == var2.vval.v_dict);
  		    if (type == TYPE_NEQUAL)
  			n1 = !n1;
  		}
  		else if (rettv->v_type != var2.v_type
  			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
  		{
  		    if (rettv->v_type != var2.v_type)
  			EMSG(_("E735: Can only compare Dictionary with Dictionary"));
  		    else
  			EMSG(_("E736: Invalid operation for Dictionary"));
  		    clear_tv(rettv);
  		    clear_tv(&var2);
  		    return FAIL;
  		}
  		else
  		{
  		    /* Compare two Dictionaries for being equal or unequal. */
  		    n1 = dict_equal(rettv->vval.v_dict, var2.vval.v_dict,
  								   ic, FALSE);
  		    if (type == TYPE_NEQUAL)
  			n1 = !n1;
  		}
  	    }
  
  	    else if (rettv->v_type == VAR_FUNC || var2.v_type == VAR_FUNC)
  	    {
  		if (rettv->v_type != var2.v_type
  			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
  		{
  		    if (rettv->v_type != var2.v_type)
  			EMSG(_("E693: Can only compare Funcref with Funcref"));
  		    else
  			EMSG(_("E694: Invalid operation for Funcrefs"));
  		    clear_tv(rettv);
  		    clear_tv(&var2);
  		    return FAIL;
  		}
  		else
  		{
  		    /* Compare two Funcrefs for being equal or unequal. */
  		    if (rettv->vval.v_string == NULL
  						|| var2.vval.v_string == NULL)
  			n1 = FALSE;
  		    else
  			n1 = STRCMP(rettv->vval.v_string,
  						     var2.vval.v_string) == 0;
  		    if (type == TYPE_NEQUAL)
  			n1 = !n1;
  		}
  	    }
  
  #ifdef FEAT_FLOAT
  	    /*
  	     * If one of the two variables is a float, compare as a float.
  	     * When using "=~" or "!~", always compare as string.
  	     */
  	    else if ((rettv->v_type == VAR_FLOAT || var2.v_type == VAR_FLOAT)
  		    && type != TYPE_MATCH && type != TYPE_NOMATCH)
  	    {
  		float_T f1, f2;
  
  		if (rettv->v_type == VAR_FLOAT)
  		    f1 = rettv->vval.v_float;
  		else
  		    f1 = get_tv_number(rettv);
  		if (var2.v_type == VAR_FLOAT)
  		    f2 = var2.vval.v_float;
  		else
  		    f2 = get_tv_number(&var2);
  		n1 = FALSE;
  		switch (type)
  		{
  		    case TYPE_EQUAL:    n1 = (f1 == f2); break;
  		    case TYPE_NEQUAL:   n1 = (f1 != f2); break;
  		    case TYPE_GREATER:  n1 = (f1 > f2); break;
  		    case TYPE_GEQUAL:   n1 = (f1 >= f2); break;
  		    case TYPE_SMALLER:  n1 = (f1 < f2); break;
  		    case TYPE_SEQUAL:   n1 = (f1 <= f2); break;
  		    case TYPE_UNKNOWN:
  		    case TYPE_MATCH:
  		    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
  		}
  	    }
  #endif
  
  	    /*
  	     * If one of the two variables is a number, compare as a number.
  	     * When using "=~" or "!~", always compare as string.
  	     */
  	    else if ((rettv->v_type == VAR_NUMBER || var2.v_type == VAR_NUMBER)
  		    && type != TYPE_MATCH && type != TYPE_NOMATCH)
  	    {
  		n1 = get_tv_number(rettv);
  		n2 = get_tv_number(&var2);
  		switch (type)
  		{
  		    case TYPE_EQUAL:    n1 = (n1 == n2); break;
  		    case TYPE_NEQUAL:   n1 = (n1 != n2); break;
  		    case TYPE_GREATER:  n1 = (n1 > n2); break;
  		    case TYPE_GEQUAL:   n1 = (n1 >= n2); break;
  		    case TYPE_SMALLER:  n1 = (n1 < n2); break;
  		    case TYPE_SEQUAL:   n1 = (n1 <= n2); break;
  		    case TYPE_UNKNOWN:
  		    case TYPE_MATCH:
  		    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
  		}
  	    }
  	    else
  	    {
  		s1 = get_tv_string_buf(rettv, buf1);
  		s2 = get_tv_string_buf(&var2, buf2);
  		if (type != TYPE_MATCH && type != TYPE_NOMATCH)
  		    i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
  		else
  		    i = 0;
  		n1 = FALSE;
  		switch (type)
  		{
  		    case TYPE_EQUAL:    n1 = (i == 0); break;
  		    case TYPE_NEQUAL:   n1 = (i != 0); break;
  		    case TYPE_GREATER:  n1 = (i > 0); break;
  		    case TYPE_GEQUAL:   n1 = (i >= 0); break;
  		    case TYPE_SMALLER:  n1 = (i < 0); break;
  		    case TYPE_SEQUAL:   n1 = (i <= 0); break;
  
  		    case TYPE_MATCH:
  		    case TYPE_NOMATCH:
  			    /* avoid 'l' flag in 'cpoptions' */
  			    save_cpo = p_cpo;
  			    p_cpo = (char_u *)"";
  			    regmatch.regprog = vim_regcomp(s2,
  							RE_MAGIC + RE_STRING);
  			    regmatch.rm_ic = ic;
  			    if (regmatch.regprog != NULL)
  			    {
  				n1 = vim_regexec_nl(&regmatch, s1, (colnr_T)0);
  				vim_regfree(regmatch.regprog);
  				if (type == TYPE_NOMATCH)
  				    n1 = !n1;
  			    }
  			    p_cpo = save_cpo;
  			    break;
  
  		    case TYPE_UNKNOWN:  break;  /* avoid gcc warning */
  		}
  	    }
  	    clear_tv(rettv);
  	    clear_tv(&var2);
  	    rettv->v_type = VAR_NUMBER;
  	    rettv->vval.v_number = n1;
  	}
      }
  
      return OK;
  }
  
  /*
   * Handle fourth level expression:
   *	+	number addition
   *	-	number subtraction
   *	.	string concatenation
   *
   * "arg" must point to the first non-white of the expression.
   * "arg" is advanced to the next non-white after the recognized expression.
   *
   * Return OK or FAIL.
   */
      static int
  eval5(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
  {
      typval_T	var2;
      typval_T	var3;
      int		op;
      long	n1, n2;
  #ifdef FEAT_FLOAT
      float_T	f1 = 0, f2 = 0;
  #endif
      char_u	*s1, *s2;
      char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
      char_u	*p;
  
      /*
       * Get the first variable.
       */
      if (eval6(arg, rettv, evaluate, FALSE) == FAIL)
  	return FAIL;
  
      /*
       * Repeat computing, until no '+', '-' or '.' is following.
       */
      for (;;)
      {
  	op = **arg;
  	if (op != '+' && op != '-' && op != '.')
  	    break;
  
  	if ((op != '+' || rettv->v_type != VAR_LIST)
  #ifdef FEAT_FLOAT
  		&& (op == '.' || rettv->v_type != VAR_FLOAT)
  #endif
  		)
  	{
  	    /* For "list + ...", an illegal use of the first operand as
  	     * a number cannot be determined before evaluating the 2nd
  	     * operand: if this is also a list, all is ok.
  	     * For "something . ...", "something - ..." or "non-list + ...",
  	     * we know that the first operand needs to be a string or number
  	     * without evaluating the 2nd operand.  So check before to avoid
  	     * side effects after an error. */
  	    if (evaluate && get_tv_string_chk(rettv) == NULL)
  	    {
  		clear_tv(rettv);
  		return FAIL;
  	    }
  	}
  
  	/*
  	 * Get the second variable.
  	 */
  	*arg = skipwhite(*arg + 1);
  	if (eval6(arg, &var2, evaluate, op == '.') == FAIL)
  	{
  	    clear_tv(rettv);
  	    return FAIL;
  	}
  
  	if (evaluate)
  	{
  	    /*
  	     * Compute the result.
  	     */
  	    if (op == '.')
  	    {
  		s1 = get_tv_string_buf(rettv, buf1);	/* already checked */
  		s2 = get_tv_string_buf_chk(&var2, buf2);
  		if (s2 == NULL)		/* type error ? */
  		{
  		    clear_tv(rettv);
  		    clear_tv(&var2);
  		    return FAIL;
  		}
  		p = concat_str(s1, s2);
  		clear_tv(rettv);
  		rettv->v_type = VAR_STRING;
  		rettv->vval.v_string = p;
  	    }
  	    else if (op == '+' && rettv->v_type == VAR_LIST
  						   && var2.v_type == VAR_LIST)
  	    {
  		/* concatenate Lists */
  		if (list_concat(rettv->vval.v_list, var2.vval.v_list,
  							       &var3) == FAIL)
  		{
  		    clear_tv(rettv);
  		    clear_tv(&var2);
  		    return FAIL;
  		}
  		clear_tv(rettv);
  		*rettv = var3;
  	    }
  	    else
  	    {
  		int	    error = FALSE;
  
  #ifdef FEAT_FLOAT
  		if (rettv->v_type == VAR_FLOAT)
  		{
  		    f1 = rettv->vval.v_float;
  		    n1 = 0;
  		}
  		else
  #endif
  		{
  		    n1 = get_tv_number_chk(rettv, &error);
  		    if (error)
  		    {
  			/* This can only happen for "list + non-list".  For
  			 * "non-list + ..." or "something - ...", we returned
  			 * before evaluating the 2nd operand. */
  			clear_tv(rettv);
  			return FAIL;
  		    }
  #ifdef FEAT_FLOAT
  		    if (var2.v_type == VAR_FLOAT)
  			f1 = n1;
  #endif
  		}
  #ifdef FEAT_FLOAT
  		if (var2.v_type == VAR_FLOAT)
  		{
  		    f2 = var2.vval.v_float;
  		    n2 = 0;
  		}
  		else
  #endif
  		{
  		    n2 = get_tv_number_chk(&var2, &error);
  		    if (error)
  		    {
  			clear_tv(rettv);
  			clear_tv(&var2);
  			return FAIL;
  		    }
  #ifdef FEAT_FLOAT
  		    if (rettv->v_type == VAR_FLOAT)
  			f2 = n2;
  #endif
  		}
  		clear_tv(rettv);
  
  #ifdef FEAT_FLOAT
  		/* If there is a float on either side the result is a float. */
  		if (rettv->v_type == VAR_FLOAT || var2.v_type == VAR_FLOAT)
  		{
  		    if (op == '+')
  			f1 = f1 + f2;
  		    else
  			f1 = f1 - f2;
  		    rettv->v_type = VAR_FLOAT;
  		    rettv->vval.v_float = f1;
  		}
  		else
  #endif
  		{
  		    if (op == '+')
  			n1 = n1 + n2;
  		    else
  			n1 = n1 - n2;
  		    rettv->v_type = VAR_NUMBER;
  		    rettv->vval.v_number = n1;
  		}
  	    }
  	    clear_tv(&var2);
  	}
      }
      return OK;
  }
  
  /*
   * Handle fifth level expression:
   *	*	number multiplication
   *	/	number division
   *	%	number modulo
   *
   * "arg" must point to the first non-white of the expression.
   * "arg" is advanced to the next non-white after the recognized expression.
   *
   * Return OK or FAIL.
   */
      static int
  eval6(arg, rettv, evaluate, want_string)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
      int		want_string;  /* after "." operator */
  {
      typval_T	var2;
      int		op;
      long	n1, n2;
  #ifdef FEAT_FLOAT
      int		use_float = FALSE;
      float_T	f1 = 0, f2;
  #endif
      int		error = FALSE;
  
      /*
       * Get the first variable.
       */
      if (eval7(arg, rettv, evaluate, want_string) == FAIL)
  	return FAIL;
  
      /*
       * Repeat computing, until no '*', '/' or '%' is following.
       */
      for (;;)
      {
  	op = **arg;
  	if (op != '*' && op != '/' && op != '%')
  	    break;
  
  	if (evaluate)
  	{
  #ifdef FEAT_FLOAT
  	    if (rettv->v_type == VAR_FLOAT)
  	    {
  		f1 = rettv->vval.v_float;
  		use_float = TRUE;
  		n1 = 0;
  	    }
  	    else
  #endif
  		n1 = get_tv_number_chk(rettv, &error);
  	    clear_tv(rettv);
  	    if (error)
  		return FAIL;
  	}
  	else
  	    n1 = 0;
  
  	/*
  	 * Get the second variable.
  	 */
  	*arg = skipwhite(*arg + 1);
  	if (eval7(arg, &var2, evaluate, FALSE) == FAIL)
  	    return FAIL;
  
  	if (evaluate)
  	{
  #ifdef FEAT_FLOAT
  	    if (var2.v_type == VAR_FLOAT)
  	    {
  		if (!use_float)
  		{
  		    f1 = n1;
  		    use_float = TRUE;
  		}
  		f2 = var2.vval.v_float;
  		n2 = 0;
  	    }
  	    else
  #endif
  	    {
  		n2 = get_tv_number_chk(&var2, &error);
  		clear_tv(&var2);
  		if (error)
  		    return FAIL;
  #ifdef FEAT_FLOAT
  		if (use_float)
  		    f2 = n2;
  #endif
  	    }
  
  	    /*
  	     * Compute the result.
  	     * When either side is a float the result is a float.
  	     */
  #ifdef FEAT_FLOAT
  	    if (use_float)
  	    {
  		if (op == '*')
  		    f1 = f1 * f2;
  		else if (op == '/')
  		{
  # ifdef VMS
  		    /* VMS crashes on divide by zero, work around it */
  		    if (f2 == 0.0)
  		    {
  			if (f1 == 0)
  			    f1 = -1 * __F_FLT_MAX - 1L;   /* similar to NaN */
  			else if (f1 < 0)
  			    f1 = -1 * __F_FLT_MAX;
  			else
  			    f1 = __F_FLT_MAX;
  		    }
  		    else
  			f1 = f1 / f2;
  # else
  		    /* We rely on the floating point library to handle divide
  		     * by zero to result in "inf" and not a crash. */
  		    f1 = f1 / f2;
  # endif
  		}
  		else
  		{
  		    EMSG(_("E804: Cannot use '%' with Float"));
  		    return FAIL;
  		}
  		rettv->v_type = VAR_FLOAT;
  		rettv->vval.v_float = f1;
  	    }
  	    else
  #endif
  	    {
  		if (op == '*')
  		    n1 = n1 * n2;
  		else if (op == '/')
  		{
  		    if (n2 == 0)	/* give an error message? */
  		    {
  			if (n1 == 0)
  			    n1 = -0x7fffffffL - 1L;	/* similar to NaN */
  			else if (n1 < 0)
  			    n1 = -0x7fffffffL;
  			else
  			    n1 = 0x7fffffffL;
  		    }
  		    else
  			n1 = n1 / n2;
  		}
  		else
  		{
  		    if (n2 == 0)	/* give an error message? */
  			n1 = 0;
  		    else
  			n1 = n1 % n2;
  		}
  		rettv->v_type = VAR_NUMBER;
  		rettv->vval.v_number = n1;
  	    }
  	}
      }
  
      return OK;
  }
  
  /*
   * Handle sixth level expression:
   *  number		number constant
   *  "string"		string constant
   *  'string'		literal string constant
   *  &option-name	option value
   *  @r			register contents
   *  identifier		variable value
   *  function()		function call
   *  $VAR		environment variable
   *  (expression)	nested expression
   *  [expr, expr]	List
   *  {key: val, key: val}  Dictionary
   *
   *  Also handle:
   *  ! in front		logical NOT
   *  - in front		unary minus
   *  + in front		unary plus (ignored)
   *  trailing []		subscript in String or List
   *  trailing .name	entry in Dictionary
   *
   * "arg" must point to the first non-white of the expression.
   * "arg" is advanced to the next non-white after the recognized expression.
   *
   * Return OK or FAIL.
   */
      static int
  eval7(arg, rettv, evaluate, want_string)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
      int		want_string UNUSED;	/* after "." operator */
  {
      long	n;
      int		len;
      char_u	*s;
      char_u	*start_leader, *end_leader;
      int		ret = OK;
      char_u	*alias;
  
      /*
       * Initialise variable so that clear_tv() can't mistake this for a
       * string and free a string that isn't there.
       */
      rettv->v_type = VAR_UNKNOWN;
  
      /*
       * Skip '!' and '-' characters.  They are handled later.
       */
      start_leader = *arg;
      while (**arg == '!' || **arg == '-' || **arg == '+')
  	*arg = skipwhite(*arg + 1);
      end_leader = *arg;
  
      switch (**arg)
      {
      /*
       * Number constant.
       */
      case '0':
      case '1':
      case '2':
      case '3':
      case '4':
      case '5':
      case '6':
      case '7':
      case '8':
      case '9':
  	{
  #ifdef FEAT_FLOAT
  		char_u *p = skipdigits(*arg + 1);
  		int    get_float = FALSE;
  
  		/* We accept a float when the format matches
  		 * "[0-9]\+\.[0-9]\+\([eE][+-]\?[0-9]\+\)\?".  This is very
  		 * strict to avoid backwards compatibility problems.
  		 * Don't look for a float after the "." operator, so that
  		 * ":let vers = 1.2.3" doesn't fail. */
  		if (!want_string && p[0] == '.' && vim_isdigit(p[1]))
  		{
  		    get_float = TRUE;
  		    p = skipdigits(p + 2);
  		    if (*p == 'e' || *p == 'E')
  		    {
  			++p;
  			if (*p == '-' || *p == '+')
  			    ++p;
  			if (!vim_isdigit(*p))
  			    get_float = FALSE;
  			else
  			    p = skipdigits(p + 1);
  		    }
  		    if (ASCII_ISALPHA(*p) || *p == '.')
  			get_float = FALSE;
  		}
  		if (get_float)
  		{
  		    float_T	f;
  
  		    *arg += string2float(*arg, &f);
  		    if (evaluate)
  		    {
  			rettv->v_type = VAR_FLOAT;
  			rettv->vval.v_float = f;
  		    }
  		}
  		else
  #endif
  		{
  		    vim_str2nr(*arg, NULL, &len, TRUE, TRUE, &n, NULL, 0);
  		    *arg += len;
  		    if (evaluate)
  		    {
  			rettv->v_type = VAR_NUMBER;
  			rettv->vval.v_number = n;
  		    }
  		}
  		break;
  	}
  
      /*
       * String constant: "string".
       */
      case '"':	ret = get_string_tv(arg, rettv, evaluate);
  		break;
  
      /*
       * Literal string constant: 'str''ing'.
       */
      case '\'':	ret = get_lit_string_tv(arg, rettv, evaluate);
  		break;
  
      /*
       * List: [expr, expr]
       */
      case '[':	ret = get_list_tv(arg, rettv, evaluate);
  		break;
  
      /*
       * Dictionary: {key: val, key: val}
       */
      case '{':	ret = get_dict_tv(arg, rettv, evaluate);
  		break;
  
      /*
       * Option value: &name
       */
      case '&':	ret = get_option_tv(arg, rettv, evaluate);
  		break;
  
      /*
       * Environment variable: $VAR.
       */
      case '$':	ret = get_env_tv(arg, rettv, evaluate);
  		break;
  
      /*
       * Register contents: @r.
       */
      case '@':	++*arg;
  		if (evaluate)
  		{
  		    rettv->v_type = VAR_STRING;
  		    rettv->vval.v_string = get_reg_contents(**arg,
  							    GREG_EXPR_SRC);
  		}
  		if (**arg != NUL)
  		    ++*arg;
  		break;
  
      /*
       * nested expression: (expression).
       */
      case '(':	*arg = skipwhite(*arg + 1);
  		ret = eval1(arg, rettv, evaluate);	/* recursive! */
  		if (**arg == ')')
  		    ++*arg;
  		else if (ret == OK)
  		{
  		    EMSG(_("E110: Missing ')'"));
  		    clear_tv(rettv);
  		    ret = FAIL;
  		}
  		break;
  
      default:	ret = NOTDONE;
  		break;
      }
  
      if (ret == NOTDONE)
      {
  	/*
  	 * Must be a variable or function name.
  	 * Can also be a curly-braces kind of name: {expr}.
  	 */
  	s = *arg;
  	len = get_name_len(arg, &alias, evaluate, TRUE);
  	if (alias != NULL)
  	    s = alias;
  
  	if (len <= 0)
  	    ret = FAIL;
  	else
  	{
  	    if (**arg == '(')		/* recursive! */
  	    {
  		/* If "s" is the name of a variable of type VAR_FUNC
  		 * use its contents. */
  		s = deref_func_name(s, &len, !evaluate);
  
  		/* Invoke the function. */
  		ret = get_func_tv(s, len, rettv, arg,
  			  curwin->w_cursor.lnum, curwin->w_cursor.lnum,
  			  &len, evaluate, NULL);
  
  		/* If evaluate is FALSE rettv->v_type was not set in
  		 * get_func_tv, but it's needed in handle_subscript() to parse
  		 * what follows. So set it here. */
  		if (rettv->v_type == VAR_UNKNOWN && !evaluate && **arg == '(')
  		{
  		    rettv->vval.v_string = vim_strsave((char_u *)"");
  		    rettv->v_type = VAR_FUNC;
  		}
  
  		/* Stop the expression evaluation when immediately
  		 * aborting on error, or when an interrupt occurred or
  		 * an exception was thrown but not caught. */
  		if (aborting())
  		{
  		    if (ret == OK)
  			clear_tv(rettv);
  		    ret = FAIL;
  		}
  	    }
  	    else if (evaluate)
  		ret = get_var_tv(s, len, rettv, NULL, TRUE, FALSE);
  	    else
  		ret = OK;
  	}
  	vim_free(alias);
      }
  
      *arg = skipwhite(*arg);
  
      /* Handle following '[', '(' and '.' for expr[expr], expr.name,
       * expr(expr). */
      if (ret == OK)
  	ret = handle_subscript(arg, rettv, evaluate, TRUE);
  
      /*
       * Apply logical NOT and unary '-', from right to left, ignore '+'.
       */
      if (ret == OK && evaluate && end_leader > start_leader)
      {
  	int	    error = FALSE;
  	int	    val = 0;
  #ifdef FEAT_FLOAT
  	float_T	    f = 0.0;
  
  	if (rettv->v_type == VAR_FLOAT)
  	    f = rettv->vval.v_float;
  	else
  #endif
  	    val = get_tv_number_chk(rettv, &error);
  	if (error)
  	{
  	    clear_tv(rettv);
  	    ret = FAIL;
  	}
  	else
  	{
  	    while (end_leader > start_leader)
  	    {
  		--end_leader;
  		if (*end_leader == '!')
  		{
  #ifdef FEAT_FLOAT
  		    if (rettv->v_type == VAR_FLOAT)
  			f = !f;
  		    else
  #endif
  			val = !val;
  		}
  		else if (*end_leader == '-')
  		{
  #ifdef FEAT_FLOAT
  		    if (rettv->v_type == VAR_FLOAT)
  			f = -f;
  		    else
  #endif
  			val = -val;
  		}
  	    }
  #ifdef FEAT_FLOAT
  	    if (rettv->v_type == VAR_FLOAT)
  	    {
  		clear_tv(rettv);
  		rettv->vval.v_float = f;
  	    }
  	    else
  #endif
  	    {
  		clear_tv(rettv);
  		rettv->v_type = VAR_NUMBER;
  		rettv->vval.v_number = val;
  	    }
  	}
      }
  
      return ret;
  }
  
  /*
   * Evaluate an "[expr]" or "[expr:expr]" index.  Also "dict.key".
   * "*arg" points to the '[' or '.'.
   * Returns FAIL or OK. "*arg" is advanced to after the ']'.
   */
      static int
  eval_index(arg, rettv, evaluate, verbose)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
      int		verbose;	/* give error messages */
  {
      int		empty1 = FALSE, empty2 = FALSE;
      typval_T	var1, var2;
      long	n1, n2 = 0;
      long	len = -1;
      int		range = FALSE;
      char_u	*s;
      char_u	*key = NULL;
  
      if (rettv->v_type == VAR_FUNC)
      {
  	if (verbose)
  	    EMSG(_("E695: Cannot index a Funcref"));
  	return FAIL;
      }
  #ifdef FEAT_FLOAT
      else if (rettv->v_type == VAR_FLOAT)
      {
  	if (verbose)
  	    EMSG(_(e_float_as_string));
  	return FAIL;
      }
  #endif
  
      if (**arg == '.')
      {
  	/*
  	 * dict.name
  	 */
  	key = *arg + 1;
  	for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
  	    ;
  	if (len == 0)
  	    return FAIL;
  	*arg = skipwhite(key + len);
      }
      else
      {
  	/*
  	 * something[idx]
  	 *
  	 * Get the (first) variable from inside the [].
  	 */
  	*arg = skipwhite(*arg + 1);
  	if (**arg == ':')
  	    empty1 = TRUE;
  	else if (eval1(arg, &var1, evaluate) == FAIL)	/* recursive! */
  	    return FAIL;
  	else if (evaluate && get_tv_string_chk(&var1) == NULL)
  	{
  	    /* not a number or string */
  	    clear_tv(&var1);
  	    return FAIL;
  	}
  
  	/*
  	 * Get the second variable from inside the [:].
  	 */
  	if (**arg == ':')
  	{
  	    range = TRUE;
  	    *arg = skipwhite(*arg + 1);
  	    if (**arg == ']')
  		empty2 = TRUE;
  	    else if (eval1(arg, &var2, evaluate) == FAIL)	/* recursive! */
  	    {
  		if (!empty1)
  		    clear_tv(&var1);
  		return FAIL;
  	    }
  	    else if (evaluate && get_tv_string_chk(&var2) == NULL)
  	    {
  		/* not a number or string */
  		if (!empty1)
  		    clear_tv(&var1);
  		clear_tv(&var2);
  		return FAIL;
  	    }
  	}
  
  	/* Check for the ']'. */
  	if (**arg != ']')
  	{
  	    if (verbose)
  		EMSG(_(e_missbrac));
  	    clear_tv(&var1);
  	    if (range)
  		clear_tv(&var2);
  	    return FAIL;
  	}
  	*arg = skipwhite(*arg + 1);	/* skip the ']' */
      }
  
      if (evaluate)
      {
  	n1 = 0;
  	if (!empty1 && rettv->v_type != VAR_DICT)
  	{
  	    n1 = get_tv_number(&var1);
  	    clear_tv(&var1);
  	}
  	if (range)
  	{
  	    if (empty2)
  		n2 = -1;
  	    else
  	    {
  		n2 = get_tv_number(&var2);
  		clear_tv(&var2);
  	    }
  	}
  
  	switch (rettv->v_type)
  	{
  	    case VAR_NUMBER:
  	    case VAR_STRING:
  		s = get_tv_string(rettv);
  		len = (long)STRLEN(s);
  		if (range)
  		{
  		    /* The resulting variable is a substring.  If the indexes
  		     * are out of range the result is empty. */
  		    if (n1 < 0)
  		    {
  			n1 = len + n1;
  			if (n1 < 0)
  			    n1 = 0;
  		    }
  		    if (n2 < 0)
  			n2 = len + n2;
  		    else if (n2 >= len)
  			n2 = len;
  		    if (n1 >= len || n2 < 0 || n1 > n2)
  			s = NULL;
  		    else
  			s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
  		}
  		else
  		{
  		    /* The resulting variable is a string of a single
  		     * character.  If the index is too big or negative the
  		     * result is empty. */
  		    if (n1 >= len || n1 < 0)
  			s = NULL;
  		    else
  			s = vim_strnsave(s + n1, 1);
  		}
  		clear_tv(rettv);
  		rettv->v_type = VAR_STRING;
  		rettv->vval.v_string = s;
  		break;
  
  	    case VAR_LIST:
  		len = list_len(rettv->vval.v_list);
  		if (n1 < 0)
  		    n1 = len + n1;
  		if (!empty1 && (n1 < 0 || n1 >= len))
  		{
  		    /* For a range we allow invalid values and return an empty
  		     * list.  A list index out of range is an error. */
  		    if (!range)
  		    {
  			if (verbose)
  			    EMSGN(_(e_listidx), n1);
  			return FAIL;
  		    }
  		    n1 = len;
  		}
  		if (range)
  		{
  		    list_T	*l;
  		    listitem_T	*item;
  
  		    if (n2 < 0)
  			n2 = len + n2;
  		    else if (n2 >= len)
  			n2 = len - 1;
  		    if (!empty2 && (n2 < 0 || n2 + 1 < n1))
  			n2 = -1;
  		    l = list_alloc();
  		    if (l == NULL)
  			return FAIL;
  		    for (item = list_find(rettv->vval.v_list, n1);
  							       n1 <= n2; ++n1)
  		    {
  			if (list_append_tv(l, &item->li_tv) == FAIL)
  			{
  			    list_free(l, TRUE);
  			    return FAIL;
  			}
  			item = item->li_next;
  		    }
  		    clear_tv(rettv);
  		    rettv->v_type = VAR_LIST;
  		    rettv->vval.v_list = l;
  		    ++l->lv_refcount;
  		}
  		else
  		{
  		    copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv, &var1);
  		    clear_tv(rettv);
  		    *rettv = var1;
  		}
  		break;
  
  	    case VAR_DICT:
  		if (range)
  		{
  		    if (verbose)
  			EMSG(_(e_dictrange));
  		    if (len == -1)
  			clear_tv(&var1);
  		    return FAIL;
  		}
  		{
  		    dictitem_T	*item;
  
  		    if (len == -1)
  		    {
  			key = get_tv_string(&var1);
  			if (*key == NUL)
  			{
  			    if (verbose)
  				EMSG(_(e_emptykey));
  			    clear_tv(&var1);
  			    return FAIL;
  			}
  		    }
  
  		    item = dict_find(rettv->vval.v_dict, key, (int)len);
  
  		    if (item == NULL && verbose)
  			EMSG2(_(e_dictkey), key);
  		    if (len == -1)
  			clear_tv(&var1);
  		    if (item == NULL)
  			return FAIL;
  
  		    copy_tv(&item->di_tv, &var1);
  		    clear_tv(rettv);
  		    *rettv = var1;
  		}
  		break;
  	}
      }
  
      return OK;
  }
  
  /*
   * Get an option value.
   * "arg" points to the '&' or '+' before the option name.
   * "arg" is advanced to character after the option name.
   * Return OK or FAIL.
   */
      static int
  get_option_tv(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;	/* when NULL, only check if option exists */
      int		evaluate;
  {
      char_u	*option_end;
      long	numval;
      char_u	*stringval;
      int		opt_type;
      int		c;
      int		working = (**arg == '+');    /* has("+option") */
      int		ret = OK;
      int		opt_flags;
  
      /*
       * Isolate the option name and find its value.
       */
      option_end = find_option_end(arg, &opt_flags);
      if (option_end == NULL)
      {
  	if (rettv != NULL)
  	    EMSG2(_("E112: Option name missing: %s"), *arg);
  	return FAIL;
      }
  
      if (!evaluate)
      {
  	*arg = option_end;
  	return OK;
      }
  
      c = *option_end;
      *option_end = NUL;
      opt_type = get_option_value(*arg, &numval,
  			       rettv == NULL ? NULL : &stringval, opt_flags);
  
      if (opt_type == -3)			/* invalid name */
      {
  	if (rettv != NULL)
  	    EMSG2(_("E113: Unknown option: %s"), *arg);
  	ret = FAIL;
      }
      else if (rettv != NULL)
      {
  	if (opt_type == -2)		/* hidden string option */
  	{
  	    rettv->v_type = VAR_STRING;
  	    rettv->vval.v_string = NULL;
  	}
  	else if (opt_type == -1)	/* hidden number option */
  	{
  	    rettv->v_type = VAR_NUMBER;
  	    rettv->vval.v_number = 0;
  	}
  	else if (opt_type == 1)		/* number option */
  	{
  	    rettv->v_type = VAR_NUMBER;
  	    rettv->vval.v_number = numval;
  	}
  	else				/* string option */
  	{
  	    rettv->v_type = VAR_STRING;
  	    rettv->vval.v_string = stringval;
  	}
      }
      else if (working && (opt_type == -2 || opt_type == -1))
  	ret = FAIL;
  
      *option_end = c;		    /* put back for error messages */
      *arg = option_end;
  
      return ret;
  }
  
  /*
   * Allocate a variable for a string constant.
   * Return OK or FAIL.
   */
      static int
  get_string_tv(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
  {
      char_u	*p;
      char_u	*name;
      int		extra = 0;
  
      /*
       * Find the end of the string, skipping backslashed characters.
       */
      for (p = *arg + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
      {
  	if (*p == '\\' && p[1] != NUL)
  	{
  	    ++p;
  	    /* A "\<x>" form occupies at least 4 characters, and produces up
  	     * to 6 characters: reserve space for 2 extra */
  	    if (*p == '<')
  		extra += 2;
  	}
      }
  
      if (*p != '"')
      {
  	EMSG2(_("E114: Missing quote: %s"), *arg);
  	return FAIL;
      }
  
      /* If only parsing, set *arg and return here */
      if (!evaluate)
      {
  	*arg = p + 1;
  	return OK;
      }
  
      /*
       * Copy the string into allocated memory, handling backslashed
       * characters.
       */
      name = alloc((unsigned)(p - *arg + extra));
      if (name == NULL)
  	return FAIL;
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = name;
  
      for (p = *arg + 1; *p != NUL && *p != '"'; )
      {
  	if (*p == '\\')
  	{
  	    switch (*++p)
  	    {
  		case 'b': *name++ = BS; ++p; break;
  		case 'e': *name++ = ESC; ++p; break;
  		case 'f': *name++ = FF; ++p; break;
  		case 'n': *name++ = NL; ++p; break;
  		case 'r': *name++ = CAR; ++p; break;
  		case 't': *name++ = TAB; ++p; break;
  
  		case 'X': /* hex: "\x1", "\x12" */
  		case 'x':
  		case 'u': /* Unicode: "\u0023" */
  		case 'U':
  			  if (vim_isxdigit(p[1]))
  			  {
  			      int	n, nr;
  			      int	c = toupper(*p);
  
  			      if (c == 'X')
  				  n = 2;
  			      else if (*p == 'u')
  				  n = 4;
  			      else
  				  n = 8;
  			      nr = 0;
  			      while (--n >= 0 && vim_isxdigit(p[1]))
  			      {
  				  ++p;
  				  nr = (nr << 4) + hex2nr(*p);
  			      }
  			      ++p;
  #ifdef FEAT_MBYTE
  			      /* For "\u" store the number according to
  			       * 'encoding'. */
  			      if (c != 'X')
  				  name += (*mb_char2bytes)(nr, name);
  			      else
  #endif
  				  *name++ = nr;
  			  }
  			  break;
  
  			  /* octal: "\1", "\12", "\123" */
  		case '0':
  		case '1':
  		case '2':
  		case '3':
  		case '4':
  		case '5':
  		case '6':
  		case '7': *name = *p++ - '0';
  			  if (*p >= '0' && *p <= '7')
  			  {
  			      *name = (*name << 3) + *p++ - '0';
  			      if (*p >= '0' && *p <= '7')
  				  *name = (*name << 3) + *p++ - '0';
  			  }
  			  ++name;
  			  break;
  
  			    /* Special key, e.g.: "\<C-W>" */
  		case '<': extra = trans_special(&p, name, TRUE);
  			  if (extra != 0)
  			  {
  			      name += extra;
  			      break;
  			  }
  			  /* FALLTHROUGH */
  
  		default:  MB_COPY_CHAR(p, name);
  			  break;
  	    }
  	}
  	else
  	    MB_COPY_CHAR(p, name);
  
      }
      *name = NUL;
      *arg = p + 1;
  
      return OK;
  }
  
  /*
   * Allocate a variable for a 'str''ing' constant.
   * Return OK or FAIL.
   */
      static int
  get_lit_string_tv(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
  {
      char_u	*p;
      char_u	*str;
      int		reduce = 0;
  
      /*
       * Find the end of the string, skipping ''.
       */
      for (p = *arg + 1; *p != NUL; mb_ptr_adv(p))
      {
  	if (*p == '\'')
  	{
  	    if (p[1] != '\'')
  		break;
  	    ++reduce;
  	    ++p;
  	}
      }
  
      if (*p != '\'')
      {
  	EMSG2(_("E115: Missing quote: %s"), *arg);
  	return FAIL;
      }
  
      /* If only parsing return after setting "*arg" */
      if (!evaluate)
      {
  	*arg = p + 1;
  	return OK;
      }
  
      /*
       * Copy the string into allocated memory, handling '' to ' reduction.
       */
      str = alloc((unsigned)((p - *arg) - reduce));
      if (str == NULL)
  	return FAIL;
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = str;
  
      for (p = *arg + 1; *p != NUL; )
      {
  	if (*p == '\'')
  	{
  	    if (p[1] != '\'')
  		break;
  	    ++p;
  	}
  	MB_COPY_CHAR(p, str);
      }
      *str = NUL;
      *arg = p + 1;
  
      return OK;
  }
  
  /*
   * Allocate a variable for a List and fill it from "*arg".
   * Return OK or FAIL.
   */
      static int
  get_list_tv(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
  {
      list_T	*l = NULL;
      typval_T	tv;
      listitem_T	*item;
  
      if (evaluate)
      {
  	l = list_alloc();
  	if (l == NULL)
  	    return FAIL;
      }
  
      *arg = skipwhite(*arg + 1);
      while (**arg != ']' && **arg != NUL)
      {
  	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
  	    goto failret;
  	if (evaluate)
  	{
  	    item = listitem_alloc();
  	    if (item != NULL)
  	    {
  		item->li_tv = tv;
  		item->li_tv.v_lock = 0;
  		list_append(l, item);
  	    }
  	    else
  		clear_tv(&tv);
  	}
  
  	if (**arg == ']')
  	    break;
  	if (**arg != ',')
  	{
  	    EMSG2(_("E696: Missing comma in List: %s"), *arg);
  	    goto failret;
  	}
  	*arg = skipwhite(*arg + 1);
      }
  
      if (**arg != ']')
      {
  	EMSG2(_("E697: Missing end of List ']': %s"), *arg);
  failret:
  	if (evaluate)
  	    list_free(l, TRUE);
  	return FAIL;
      }
  
      *arg = skipwhite(*arg + 1);
      if (evaluate)
      {
  	rettv->v_type = VAR_LIST;
  	rettv->vval.v_list = l;
  	++l->lv_refcount;
      }
  
      return OK;
  }
  
  /*
   * Allocate an empty header for a list.
   * Caller should take care of the reference count.
   */
      list_T *
  list_alloc()
  {
      list_T  *l;
  
      l = (list_T *)alloc_clear(sizeof(list_T));
      if (l != NULL)
      {
  	/* Prepend the list to the list of lists for garbage collection. */
  	if (first_list != NULL)
  	    first_list->lv_used_prev = l;
  	l->lv_used_prev = NULL;
  	l->lv_used_next = first_list;
  	first_list = l;
      }
      return l;
  }
  
  /*
   * Allocate an empty list for a return value.
   * Returns OK or FAIL.
   */
      static int
  rettv_list_alloc(rettv)
      typval_T	*rettv;
  {
      list_T	*l = list_alloc();
  
      if (l == NULL)
  	return FAIL;
  
      rettv->vval.v_list = l;
      rettv->v_type = VAR_LIST;
      ++l->lv_refcount;
      return OK;
  }
  
  /*
   * Unreference a list: decrement the reference count and free it when it
   * becomes zero.
   */
      void
  list_unref(l)
      list_T *l;
  {
      if (l != NULL && --l->lv_refcount <= 0)
  	list_free(l, TRUE);
  }
  
  /*
   * Free a list, including all non-container items it points to.
   * Ignores the reference count.
   */
      void
  list_free(l, recurse)
      list_T  *l;
      int	    recurse;	/* Free Lists and Dictionaries recursively. */
  {
      listitem_T *item;
  
      /* Remove the list from the list of lists for garbage collection. */
      if (l->lv_used_prev == NULL)
  	first_list = l->lv_used_next;
      else
  	l->lv_used_prev->lv_used_next = l->lv_used_next;
      if (l->lv_used_next != NULL)
  	l->lv_used_next->lv_used_prev = l->lv_used_prev;
  
      for (item = l->lv_first; item != NULL; item = l->lv_first)
      {
  	/* Remove the item before deleting it. */
  	l->lv_first = item->li_next;
  	if (recurse || (item->li_tv.v_type != VAR_LIST
  					   && item->li_tv.v_type != VAR_DICT))
  	    clear_tv(&item->li_tv);
  	vim_free(item);
      }
      vim_free(l);
  }
  
  /*
   * Allocate a list item.
   * It is not initialized, don't forget to set v_lock.
   */
      listitem_T *
  listitem_alloc()
  {
      return (listitem_T *)alloc(sizeof(listitem_T));
  }
  
  /*
   * Free a list item.  Also clears the value.  Does not notify watchers.
   */
      void
  listitem_free(item)
      listitem_T *item;
  {
      clear_tv(&item->li_tv);
      vim_free(item);
  }
  
  /*
   * Remove a list item from a List and free it.  Also clears the value.
   */
      void
  listitem_remove(l, item)
      list_T  *l;
      listitem_T *item;
  {
      vimlist_remove(l, item, item);
      listitem_free(item);
  }
  
  /*
   * Get the number of items in a list.
   */
      static long
  list_len(l)
      list_T	*l;
  {
      if (l == NULL)
  	return 0L;
      return l->lv_len;
  }
  
  /*
   * Return TRUE when two lists have exactly the same values.
   */
      static int
  list_equal(l1, l2, ic, recursive)
      list_T	*l1;
      list_T	*l2;
      int		ic;	/* ignore case for strings */
      int		recursive;  /* TRUE when used recursively */
  {
      listitem_T	*item1, *item2;
  
      if (l1 == NULL || l2 == NULL)
  	return FALSE;
      if (l1 == l2)
  	return TRUE;
      if (list_len(l1) != list_len(l2))
  	return FALSE;
  
      for (item1 = l1->lv_first, item2 = l2->lv_first;
  	    item1 != NULL && item2 != NULL;
  			       item1 = item1->li_next, item2 = item2->li_next)
  	if (!tv_equal(&item1->li_tv, &item2->li_tv, ic, recursive))
  	    return FALSE;
      return item1 == NULL && item2 == NULL;
  }
  
  #if defined(FEAT_RUBY) || defined(FEAT_PYTHON) || defined(FEAT_PYTHON3) \
  	|| defined(FEAT_MZSCHEME) || defined(FEAT_LUA) || defined(PROTO)
  /*
   * Return the dictitem that an entry in a hashtable points to.
   */
      dictitem_T *
  dict_lookup(hi)
      hashitem_T *hi;
  {
      return HI2DI(hi);
  }
  #endif
  
  /*
   * Return TRUE when two dictionaries have exactly the same key/values.
   */
      static int
  dict_equal(d1, d2, ic, recursive)
      dict_T	*d1;
      dict_T	*d2;
      int		ic;	/* ignore case for strings */
      int		recursive; /* TRUE when used recursively */
  {
      hashitem_T	*hi;
      dictitem_T	*item2;
      int		todo;
  
      if (d1 == NULL || d2 == NULL)
  	return FALSE;
      if (d1 == d2)
  	return TRUE;
      if (dict_len(d1) != dict_len(d2))
  	return FALSE;
  
      todo = (int)d1->dv_hashtab.ht_used;
      for (hi = d1->dv_hashtab.ht_array; todo > 0; ++hi)
      {
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    item2 = dict_find(d2, hi->hi_key, -1);
  	    if (item2 == NULL)
  		return FALSE;
  	    if (!tv_equal(&HI2DI(hi)->di_tv, &item2->di_tv, ic, recursive))
  		return FALSE;
  	    --todo;
  	}
      }
      return TRUE;
  }
  
  static int tv_equal_recurse_limit;
  
  /*
   * Return TRUE if "tv1" and "tv2" have the same value.
   * Compares the items just like "==" would compare them, but strings and
   * numbers are different.  Floats and numbers are also different.
   */
      static int
  tv_equal(tv1, tv2, ic, recursive)
      typval_T *tv1;
      typval_T *tv2;
      int	     ic;	    /* ignore case */
      int	     recursive;	    /* TRUE when used recursively */
  {
      char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
      char_u	*s1, *s2;
      static int  recursive_cnt = 0;	    /* catch recursive loops */
      int		r;
  
      if (tv1->v_type != tv2->v_type)
  	return FALSE;
  
      /* Catch lists and dicts that have an endless loop by limiting
       * recursiveness to a limit.  We guess they are equal then.
       * A fixed limit has the problem of still taking an awful long time.
       * Reduce the limit every time running into it. That should work fine for
       * deeply linked structures that are not recursively linked and catch
       * recursiveness quickly. */
      if (!recursive)
  	tv_equal_recurse_limit = 1000;
      if (recursive_cnt >= tv_equal_recurse_limit)
      {
  	--tv_equal_recurse_limit;
  	return TRUE;
      }
  
      switch (tv1->v_type)
      {
  	case VAR_LIST:
  	    ++recursive_cnt;
  	    r = list_equal(tv1->vval.v_list, tv2->vval.v_list, ic, TRUE);
  	    --recursive_cnt;
  	    return r;
  
  	case VAR_DICT:
  	    ++recursive_cnt;
  	    r = dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic, TRUE);
  	    --recursive_cnt;
  	    return r;
  
  	case VAR_FUNC:
  	    return (tv1->vval.v_string != NULL
  		    && tv2->vval.v_string != NULL
  		    && STRCMP(tv1->vval.v_string, tv2->vval.v_string) == 0);
  
  	case VAR_NUMBER:
  	    return tv1->vval.v_number == tv2->vval.v_number;
  
  #ifdef FEAT_FLOAT
  	case VAR_FLOAT:
  	    return tv1->vval.v_float == tv2->vval.v_float;
  #endif
  
  	case VAR_STRING:
  	    s1 = get_tv_string_buf(tv1, buf1);
  	    s2 = get_tv_string_buf(tv2, buf2);
  	    return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
      }
  
      EMSG2(_(e_intern2), "tv_equal()");
      return TRUE;
  }
  
  /*
   * Locate item with index "n" in list "l" and return it.
   * A negative index is counted from the end; -1 is the last item.
   * Returns NULL when "n" is out of range.
   */
      listitem_T *
  list_find(l, n)
      list_T	*l;
      long	n;
  {
      listitem_T	*item;
      long	idx;
  
      if (l == NULL)
  	return NULL;
  
      /* Negative index is relative to the end. */
      if (n < 0)
  	n = l->lv_len + n;
  
      /* Check for index out of range. */
      if (n < 0 || n >= l->lv_len)
  	return NULL;
  
      /* When there is a cached index may start search from there. */
      if (l->lv_idx_item != NULL)
      {
  	if (n < l->lv_idx / 2)
  	{
  	    /* closest to the start of the list */
  	    item = l->lv_first;
  	    idx = 0;
  	}
  	else if (n > (l->lv_idx + l->lv_len) / 2)
  	{
  	    /* closest to the end of the list */
  	    item = l->lv_last;
  	    idx = l->lv_len - 1;
  	}
  	else
  	{
  	    /* closest to the cached index */
  	    item = l->lv_idx_item;
  	    idx = l->lv_idx;
  	}
      }
      else
      {
  	if (n < l->lv_len / 2)
  	{
  	    /* closest to the start of the list */
  	    item = l->lv_first;
  	    idx = 0;
  	}
  	else
  	{
  	    /* closest to the end of the list */
  	    item = l->lv_last;
  	    idx = l->lv_len - 1;
  	}
      }
  
      while (n > idx)
      {
  	/* search forward */
  	item = item->li_next;
  	++idx;
      }
      while (n < idx)
      {
  	/* search backward */
  	item = item->li_prev;
  	--idx;
      }
  
      /* cache the used index */
      l->lv_idx = idx;
      l->lv_idx_item = item;
  
      return item;
  }
  
  /*
   * Get list item "l[idx]" as a number.
   */
      static long
  list_find_nr(l, idx, errorp)
      list_T	*l;
      long	idx;
      int		*errorp;	/* set to TRUE when something wrong */
  {
      listitem_T	*li;
  
      li = list_find(l, idx);
      if (li == NULL)
      {
  	if (errorp != NULL)
  	    *errorp = TRUE;
  	return -1L;
      }
      return get_tv_number_chk(&li->li_tv, errorp);
  }
  
  /*
   * Get list item "l[idx - 1]" as a string.  Returns NULL for failure.
   */
      char_u *
  list_find_str(l, idx)
      list_T	*l;
      long	idx;
  {
      listitem_T	*li;
  
      li = list_find(l, idx - 1);
      if (li == NULL)
      {
  	EMSGN(_(e_listidx), idx);
  	return NULL;
      }
      return get_tv_string(&li->li_tv);
  }
  
  /*
   * Locate "item" list "l" and return its index.
   * Returns -1 when "item" is not in the list.
   */
      static long
  list_idx_of_item(l, item)
      list_T	*l;
      listitem_T	*item;
  {
      long	idx = 0;
      listitem_T	*li;
  
      if (l == NULL)
  	return -1;
      idx = 0;
      for (li = l->lv_first; li != NULL && li != item; li = li->li_next)
  	++idx;
      if (li == NULL)
  	return -1;
      return idx;
  }
  
  /*
   * Append item "item" to the end of list "l".
   */
      void
  list_append(l, item)
      list_T	*l;
      listitem_T	*item;
  {
      if (l->lv_last == NULL)
      {
  	/* empty list */
  	l->lv_first = item;
  	l->lv_last = item;
  	item->li_prev = NULL;
      }
      else
      {
  	l->lv_last->li_next = item;
  	item->li_prev = l->lv_last;
  	l->lv_last = item;
      }
      ++l->lv_len;
      item->li_next = NULL;
  }
  
  /*
   * Append typval_T "tv" to the end of list "l".
   * Return FAIL when out of memory.
   */
      int
  list_append_tv(l, tv)
      list_T	*l;
      typval_T	*tv;
  {
      listitem_T	*li = listitem_alloc();
  
      if (li == NULL)
  	return FAIL;
      copy_tv(tv, &li->li_tv);
      list_append(l, li);
      return OK;
  }
  
  /*
   * Add a dictionary to a list.  Used by getqflist().
   * Return FAIL when out of memory.
   */
      int
  list_append_dict(list, dict)
      list_T	*list;
      dict_T	*dict;
  {
      listitem_T	*li = listitem_alloc();
  
      if (li == NULL)
  	return FAIL;
      li->li_tv.v_type = VAR_DICT;
      li->li_tv.v_lock = 0;
      li->li_tv.vval.v_dict = dict;
      list_append(list, li);
      ++dict->dv_refcount;
      return OK;
  }
  
  /*
   * Make a copy of "str" and append it as an item to list "l".
   * When "len" >= 0 use "str[len]".
   * Returns FAIL when out of memory.
   */
      int
  list_append_string(l, str, len)
      list_T	*l;
      char_u	*str;
      int		len;
  {
      listitem_T *li = listitem_alloc();
  
      if (li == NULL)
  	return FAIL;
      list_append(l, li);
      li->li_tv.v_type = VAR_STRING;
      li->li_tv.v_lock = 0;
      if (str == NULL)
  	li->li_tv.vval.v_string = NULL;
      else if ((li->li_tv.vval.v_string = (len >= 0 ? vim_strnsave(str, len)
  						 : vim_strsave(str))) == NULL)
  	return FAIL;
      return OK;
  }
  
  /*
   * Append "n" to list "l".
   * Returns FAIL when out of memory.
   */
      static int
  list_append_number(l, n)
      list_T	*l;
      varnumber_T	n;
  {
      listitem_T	*li;
  
      li = listitem_alloc();
      if (li == NULL)
  	return FAIL;
      li->li_tv.v_type = VAR_NUMBER;
      li->li_tv.v_lock = 0;
      li->li_tv.vval.v_number = n;
      list_append(l, li);
      return OK;
  }
  
  /*
   * Insert typval_T "tv" in list "l" before "item".
   * If "item" is NULL append at the end.
   * Return FAIL when out of memory.
   */
      int
  list_insert_tv(l, tv, item)
      list_T	*l;
      typval_T	*tv;
      listitem_T	*item;
  {
      listitem_T	*ni = listitem_alloc();
  
      if (ni == NULL)
  	return FAIL;
      copy_tv(tv, &ni->li_tv);
      list_insert(l, ni, item);
      return OK;
  }
  
      void
  list_insert(l, ni, item)
      list_T	*l;
      listitem_T	*ni;
      listitem_T	*item;
  {
      if (item == NULL)
  	/* Append new item at end of list. */
  	list_append(l, ni);
      else
      {
  	/* Insert new item before existing item. */
  	ni->li_prev = item->li_prev;
  	ni->li_next = item;
  	if (item->li_prev == NULL)
  	{
  	    l->lv_first = ni;
  	    ++l->lv_idx;
  	}
  	else
  	{
  	    item->li_prev->li_next = ni;
  	    l->lv_idx_item = NULL;
  	}
  	item->li_prev = ni;
  	++l->lv_len;
      }
  }
  
  /*
   * Extend "l1" with "l2".
   * If "bef" is NULL append at the end, otherwise insert before this item.
   * Returns FAIL when out of memory.
   */
      static int
  list_extend(l1, l2, bef)
      list_T	*l1;
      list_T	*l2;
      listitem_T	*bef;
  {
      listitem_T	*item;
      int		todo = l2->lv_len;
  
      /* We also quit the loop when we have inserted the original item count of
       * the list, avoid a hang when we extend a list with itself. */
      for (item = l2->lv_first; item != NULL && --todo >= 0; item = item->li_next)
  	if (list_insert_tv(l1, &item->li_tv, bef) == FAIL)
  	    return FAIL;
      return OK;
  }
  
  /*
   * Concatenate lists "l1" and "l2" into a new list, stored in "tv".
   * Return FAIL when out of memory.
   */
      static int
  list_concat(l1, l2, tv)
      list_T	*l1;
      list_T	*l2;
      typval_T	*tv;
  {
      list_T	*l;
  
      if (l1 == NULL || l2 == NULL)
  	return FAIL;
  
      /* make a copy of the first list. */
      l = list_copy(l1, FALSE, 0);
      if (l == NULL)
  	return FAIL;
      tv->v_type = VAR_LIST;
      tv->vval.v_list = l;
  
      /* append all items from the second list */
      return list_extend(l, l2, NULL);
  }
  
  /*
   * Make a copy of list "orig".  Shallow if "deep" is FALSE.
   * The refcount of the new list is set to 1.
   * See item_copy() for "copyID".
   * Returns NULL when out of memory.
   */
      static list_T *
  list_copy(orig, deep, copyID)
      list_T	*orig;
      int		deep;
      int		copyID;
  {
      list_T	*copy;
      listitem_T	*item;
      listitem_T	*ni;
  
      if (orig == NULL)
  	return NULL;
  
      copy = list_alloc();
      if (copy != NULL)
      {
  	if (copyID != 0)
  	{
  	    /* Do this before adding the items, because one of the items may
  	     * refer back to this list. */
  	    orig->lv_copyID = copyID;
  	    orig->lv_copylist = copy;
  	}
  	for (item = orig->lv_first; item != NULL && !got_int;
  							 item = item->li_next)
  	{
  	    ni = listitem_alloc();
  	    if (ni == NULL)
  		break;
  	    if (deep)
  	    {
  		if (item_copy(&item->li_tv, &ni->li_tv, deep, copyID) == FAIL)
  		{
  		    vim_free(ni);
  		    break;
  		}
  	    }
  	    else
  		copy_tv(&item->li_tv, &ni->li_tv);
  	    list_append(copy, ni);
  	}
  	++copy->lv_refcount;
  	if (item != NULL)
  	{
  	    list_unref(copy);
  	    copy = NULL;
  	}
      }
  
      return copy;
  }
  
  /*
   * Remove items "item" to "item2" from list "l".
   * Does not free the listitem or the value!
   * This used to be called list_remove, but that conflicts with a Sun header
   * file.
   */
      void
  vimlist_remove(l, item, item2)
      list_T	*l;
      listitem_T	*item;
      listitem_T	*item2;
  {
      listitem_T	*ip;
  
      /* notify watchers */
      for (ip = item; ip != NULL; ip = ip->li_next)
      {
  	--l->lv_len;
  	list_fix_watch(l, ip);
  	if (ip == item2)
  	    break;
      }
  
      if (item2->li_next == NULL)
  	l->lv_last = item->li_prev;
      else
  	item2->li_next->li_prev = item->li_prev;
      if (item->li_prev == NULL)
  	l->lv_first = item2->li_next;
      else
  	item->li_prev->li_next = item2->li_next;
      l->lv_idx_item = NULL;
  }
  
  /*
   * Return an allocated string with the string representation of a list.
   * May return NULL.
   */
      static char_u *
  list2string(tv, copyID)
      typval_T	*tv;
      int		copyID;
  {
      garray_T	ga;
  
      if (tv->vval.v_list == NULL)
  	return NULL;
      ga_init2(&ga, (int)sizeof(char), 80);
      ga_append(&ga, '[');
      if (list_join(&ga, tv->vval.v_list, (char_u *)", ", FALSE, copyID) == FAIL)
      {
  	vim_free(ga.ga_data);
  	return NULL;
      }
      ga_append(&ga, ']');
      ga_append(&ga, NUL);
      return (char_u *)ga.ga_data;
  }
  
  typedef struct join_S {
      char_u	*s;
      char_u	*tofree;
  } join_T;
  
      static int
  list_join_inner(gap, l, sep, echo_style, copyID, join_gap)
      garray_T	*gap;		/* to store the result in */
      list_T	*l;
      char_u	*sep;
      int		echo_style;
      int		copyID;
      garray_T	*join_gap;	/* to keep each list item string */
  {
      int		i;
      join_T	*p;
      int		len;
      int		sumlen = 0;
      int		first = TRUE;
      char_u	*tofree;
      char_u	numbuf[NUMBUFLEN];
      listitem_T	*item;
      char_u	*s;
  
      /* Stringify each item in the list. */
      for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
      {
  	if (echo_style)
  	    s = echo_string(&item->li_tv, &tofree, numbuf, copyID);
  	else
  	    s = tv2string(&item->li_tv, &tofree, numbuf, copyID);
  	if (s == NULL)
  	    return FAIL;
  
  	len = (int)STRLEN(s);
  	sumlen += len;
  
  	ga_grow(join_gap, 1);
  	p = ((join_T *)join_gap->ga_data) + (join_gap->ga_len++);
  	if (tofree != NULL || s != numbuf)
  	{
  	    p->s = s;
  	    p->tofree = tofree;
  	}
  	else
  	{
  	    p->s = vim_strnsave(s, len);
  	    p->tofree = p->s;
  	}
  
  	line_breakcheck();
  	if (did_echo_string_emsg)  /* recursion error, bail out */
  	    break;
      }
  
      /* Allocate result buffer with its total size, avoid re-allocation and
       * multiple copy operations.  Add 2 for a tailing ']' and NUL. */
      if (join_gap->ga_len >= 2)
  	sumlen += (int)STRLEN(sep) * (join_gap->ga_len - 1);
      if (ga_grow(gap, sumlen + 2) == FAIL)
  	return FAIL;
  
      for (i = 0; i < join_gap->ga_len && !got_int; ++i)
      {
  	if (first)
  	    first = FALSE;
  	else
  	    ga_concat(gap, sep);
  	p = ((join_T *)join_gap->ga_data) + i;
  
  	if (p->s != NULL)
  	    ga_concat(gap, p->s);
  	line_breakcheck();
      }
  
      return OK;
  }
  
  /*
   * Join list "l" into a string in "*gap", using separator "sep".
   * When "echo_style" is TRUE use String as echoed, otherwise as inside a List.
   * Return FAIL or OK.
   */
      static int
  list_join(gap, l, sep, echo_style, copyID)
      garray_T	*gap;
      list_T	*l;
      char_u	*sep;
      int		echo_style;
      int		copyID;
  {
      garray_T	join_ga;
      int		retval;
      join_T	*p;
      int		i;
  
      if (l->lv_len < 1)
  	return OK; /* nothing to do */
      ga_init2(&join_ga, (int)sizeof(join_T), l->lv_len);
      retval = list_join_inner(gap, l, sep, echo_style, copyID, &join_ga);
  
      /* Dispose each item in join_ga. */
      if (join_ga.ga_data != NULL)
      {
  	p = (join_T *)join_ga.ga_data;
  	for (i = 0; i < join_ga.ga_len; ++i)
  	{
  	    vim_free(p->tofree);
  	    ++p;
  	}
  	ga_clear(&join_ga);
      }
  
      return retval;
  }
  
  /*
   * Garbage collection for lists and dictionaries.
   *
   * We use reference counts to be able to free most items right away when they
   * are no longer used.  But for composite items it's possible that it becomes
   * unused while the reference count is > 0: When there is a recursive
   * reference.  Example:
   *	:let l = [1, 2, 3]
   *	:let d = {9: l}
   *	:let l[1] = d
   *
   * Since this is quite unusual we handle this with garbage collection: every
   * once in a while find out which lists and dicts are not referenced from any
   * variable.
   *
   * Here is a good reference text about garbage collection (refers to Python
   * but it applies to all reference-counting mechanisms):
   *	http://python.ca/nas/python/gc/
   */
  
  /*
   * Do garbage collection for lists and dicts.
   * Return TRUE if some memory was freed.
   */
      int
  garbage_collect()
  {
      int		copyID;
      int		abort = FALSE;
      buf_T	*buf;
      win_T	*wp;
      int		i;
      funccall_T	*fc, **pfc;
      int		did_free = FALSE;
      int		did_free_funccal = FALSE;
  #ifdef FEAT_WINDOWS
      tabpage_T	*tp;
  #endif
  
      /* Only do this once. */
      want_garbage_collect = FALSE;
      may_garbage_collect = FALSE;
      garbage_collect_at_exit = FALSE;
  
      /* We advance by two because we add one for items referenced through
       * previous_funccal. */
      current_copyID += COPYID_INC;
      copyID = current_copyID;
  
      /*
       * 1. Go through all accessible variables and mark all lists and dicts
       *    with copyID.
       */
  
      /* Don't free variables in the previous_funccal list unless they are only
       * referenced through previous_funccal.  This must be first, because if
       * the item is referenced elsewhere the funccal must not be freed. */
      for (fc = previous_funccal; fc != NULL; fc = fc->caller)
      {
  	abort = abort || set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID + 1,
  									NULL);
  	abort = abort || set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID + 1,
  									NULL);
      }
  
      /* script-local variables */
      for (i = 1; i <= ga_scripts.ga_len; ++i)
  	abort = abort || set_ref_in_ht(&SCRIPT_VARS(i), copyID, NULL);
  
      /* buffer-local variables */
      for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  	abort = abort || set_ref_in_item(&buf->b_bufvar.di_tv, copyID,
  								  NULL, NULL);
  
      /* window-local variables */
      FOR_ALL_TAB_WINDOWS(tp, wp)
  	abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID,
  								  NULL, NULL);
  #ifdef FEAT_AUTOCMD
      if (aucmd_win != NULL)
  	abort = abort || set_ref_in_item(&aucmd_win->w_winvar.di_tv, copyID,
  								  NULL, NULL);
  #endif
  
  #ifdef FEAT_WINDOWS
      /* tabpage-local variables */
      for (tp = first_tabpage; tp != NULL; tp = tp->tp_next)
  	abort = abort || set_ref_in_item(&tp->tp_winvar.di_tv, copyID,
  								  NULL, NULL);
  #endif
  
      /* global variables */
      abort = abort || set_ref_in_ht(&globvarht, copyID, NULL);
  
      /* function-local variables */
      for (fc = current_funccal; fc != NULL; fc = fc->caller)
      {
  	abort = abort || set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID, NULL);
  	abort = abort || set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID, NULL);
      }
  
      /* v: vars */
      abort = abort || set_ref_in_ht(&vimvarht, copyID, NULL);
  
  #ifdef FEAT_LUA
      abort = abort || set_ref_in_lua(copyID);
  #endif
  
  #ifdef FEAT_PYTHON
      abort = abort || set_ref_in_python(copyID);
  #endif
  
  #ifdef FEAT_PYTHON3
      abort = abort || set_ref_in_python3(copyID);
  #endif
  
      if (!abort)
      {
  	/*
  	 * 2. Free lists and dictionaries that are not referenced.
  	 */
  	did_free = free_unref_items(copyID);
  
  	/*
  	 * 3. Check if any funccal can be freed now.
  	 */
  	for (pfc = &previous_funccal; *pfc != NULL; )
  	{
  	    if (can_free_funccal(*pfc, copyID))
  	    {
  		fc = *pfc;
  		*pfc = fc->caller;
  		free_funccal(fc, TRUE);
  		did_free = TRUE;
  		did_free_funccal = TRUE;
  	    }
  	    else
  		pfc = &(*pfc)->caller;
  	}
  	if (did_free_funccal)
  	    /* When a funccal was freed some more items might be garbage
  	     * collected, so run again. */
  	    (void)garbage_collect();
      }
      else if (p_verbose > 0)
      {
  	verb_msg((char_u *)_("Not enough memory to set references, garbage collection aborted!"));
      }
  
      return did_free;
  }
  
  /*
   * Free lists and dictionaries that are no longer referenced.
   */
      static int
  free_unref_items(copyID)
      int copyID;
  {
      dict_T	*dd, *dd_next;
      list_T	*ll, *ll_next;
      int		did_free = FALSE;
  
      /*
       * Go through the list of dicts and free items without the copyID.
       */
      for (dd = first_dict; dd != NULL; )
      {
  	dd_next = dd->dv_used_next;
  	if ((dd->dv_copyID & COPYID_MASK) != (copyID & COPYID_MASK))
  	{
  	    /* Free the Dictionary and ordinary items it contains, but don't
  	     * recurse into Lists and Dictionaries, they will be in the list
  	     * of dicts or list of lists. */
  	    dict_free(dd, FALSE);
  	    did_free = TRUE;
  	}
  	dd = dd_next;
      }
  
      /*
       * Go through the list of lists and free items without the copyID.
       * But don't free a list that has a watcher (used in a for loop), these
       * are not referenced anywhere.
       */
      for (ll = first_list; ll != NULL; )
      {
  	ll_next = ll->lv_used_next;
  	if ((ll->lv_copyID & COPYID_MASK) != (copyID & COPYID_MASK)
  						      && ll->lv_watch == NULL)
  	{
  	    /* Free the List and ordinary items it contains, but don't recurse
  	     * into Lists and Dictionaries, they will be in the list of dicts
  	     * or list of lists. */
  	    list_free(ll, FALSE);
  	    did_free = TRUE;
  	}
  	ll = ll_next;
      }
      return did_free;
  }
  
  /*
   * Mark all lists and dicts referenced through hashtab "ht" with "copyID".
   * "list_stack" is used to add lists to be marked.  Can be NULL.
   *
   * Returns TRUE if setting references failed somehow.
   */
      int
  set_ref_in_ht(ht, copyID, list_stack)
      hashtab_T	    *ht;
      int		    copyID;
      list_stack_T    **list_stack;
  {
      int		todo;
      int		abort = FALSE;
      hashitem_T	*hi;
      hashtab_T	*cur_ht;
      ht_stack_T	*ht_stack = NULL;
      ht_stack_T	*tempitem;
  
      cur_ht = ht;
      for (;;)
      {
  	if (!abort)
  	{
  	    /* Mark each item in the hashtab.  If the item contains a hashtab
  	     * it is added to ht_stack, if it contains a list it is added to
  	     * list_stack. */
  	    todo = (int)cur_ht->ht_used;
  	    for (hi = cur_ht->ht_array; todo > 0; ++hi)
  		if (!HASHITEM_EMPTY(hi))
  		{
  		    --todo;
  		    abort = abort || set_ref_in_item(&HI2DI(hi)->di_tv, copyID,
  						       &ht_stack, list_stack);
  		}
  	}
  
  	if (ht_stack == NULL)
  	    break;
  
  	/* take an item from the stack */
  	cur_ht = ht_stack->ht;
  	tempitem = ht_stack;
  	ht_stack = ht_stack->prev;
  	free(tempitem);
      }
  
      return abort;
  }
  
  /*
   * Mark all lists and dicts referenced through list "l" with "copyID".
   * "ht_stack" is used to add hashtabs to be marked.  Can be NULL.
   *
   * Returns TRUE if setting references failed somehow.
   */
      int
  set_ref_in_list(l, copyID, ht_stack)
      list_T	*l;
      int		copyID;
      ht_stack_T	**ht_stack;
  {
      listitem_T	 *li;
      int		 abort = FALSE;
      list_T	 *cur_l;
      list_stack_T *list_stack = NULL;
      list_stack_T *tempitem;
  
      cur_l = l;
      for (;;)
      {
  	if (!abort)
  	    /* Mark each item in the list.  If the item contains a hashtab
  	     * it is added to ht_stack, if it contains a list it is added to
  	     * list_stack. */
  	    for (li = cur_l->lv_first; !abort && li != NULL; li = li->li_next)
  		abort = abort || set_ref_in_item(&li->li_tv, copyID,
  						       ht_stack, &list_stack);
  	if (list_stack == NULL)
  	    break;
  
  	/* take an item from the stack */
  	cur_l = list_stack->list;
  	tempitem = list_stack;
  	list_stack = list_stack->prev;
  	free(tempitem);
      }
  
      return abort;
  }
  
  /*
   * Mark all lists and dicts referenced through typval "tv" with "copyID".
   * "list_stack" is used to add lists to be marked.  Can be NULL.
   * "ht_stack" is used to add hashtabs to be marked.  Can be NULL.
   *
   * Returns TRUE if setting references failed somehow.
   */
      int
  set_ref_in_item(tv, copyID, ht_stack, list_stack)
      typval_T	    *tv;
      int		    copyID;
      ht_stack_T	    **ht_stack;
      list_stack_T    **list_stack;
  {
      dict_T	*dd;
      list_T	*ll;
      int		abort = FALSE;
  
      switch (tv->v_type)
      {
  	case VAR_DICT:
  	    dd = tv->vval.v_dict;
  	    if (dd != NULL && dd->dv_copyID != copyID)
  	    {
  		/* Didn't see this dict yet. */
  		dd->dv_copyID = copyID;
  		if (ht_stack == NULL)
  		{
  		    abort = set_ref_in_ht(&dd->dv_hashtab, copyID, list_stack);
  		}
  		else
  		{
  		    ht_stack_T *newitem = (ht_stack_T*)malloc(
  							  sizeof(ht_stack_T));
  		    if (newitem == NULL)
  			abort = TRUE;
  		    else
  		    {
  			newitem->ht = &dd->dv_hashtab;
  			newitem->prev = *ht_stack;
  			*ht_stack = newitem;
  		    }
  		}
  	    }
  	    break;
  
  	case VAR_LIST:
  	    ll = tv->vval.v_list;
  	    if (ll != NULL && ll->lv_copyID != copyID)
  	    {
  		/* Didn't see this list yet. */
  		ll->lv_copyID = copyID;
  		if (list_stack == NULL)
  		{
  		    abort = set_ref_in_list(ll, copyID, ht_stack);
  		}
  		else
  		{
  		    list_stack_T *newitem = (list_stack_T*)malloc(
  							sizeof(list_stack_T));
  		    if (newitem == NULL)
  			abort = TRUE;
  		    else
  		    {
  			newitem->list = ll;
  			newitem->prev = *list_stack;
  			*list_stack = newitem;
  		    }
  		}
  	    }
  	    break;
      }
      return abort;
  }
  
  /*
   * Allocate an empty header for a dictionary.
   */
      dict_T *
  dict_alloc()
  {
      dict_T *d;
  
      d = (dict_T *)alloc(sizeof(dict_T));
      if (d != NULL)
      {
  	/* Add the dict to the list of dicts for garbage collection. */
  	if (first_dict != NULL)
  	    first_dict->dv_used_prev = d;
  	d->dv_used_next = first_dict;
  	d->dv_used_prev = NULL;
  	first_dict = d;
  
  	hash_init(&d->dv_hashtab);
  	d->dv_lock = 0;
  	d->dv_scope = 0;
  	d->dv_refcount = 0;
  	d->dv_copyID = 0;
      }
      return d;
  }
  
  /*
   * Allocate an empty dict for a return value.
   * Returns OK or FAIL.
   */
      static int
  rettv_dict_alloc(rettv)
      typval_T	*rettv;
  {
      dict_T	*d = dict_alloc();
  
      if (d == NULL)
  	return FAIL;
  
      rettv->vval.v_dict = d;
      rettv->v_type = VAR_DICT;
      ++d->dv_refcount;
      return OK;
  }
  
  
  /*
   * Unreference a Dictionary: decrement the reference count and free it when it
   * becomes zero.
   */
      void
  dict_unref(d)
      dict_T *d;
  {
      if (d != NULL && --d->dv_refcount <= 0)
  	dict_free(d, TRUE);
  }
  
  /*
   * Free a Dictionary, including all non-container items it contains.
   * Ignores the reference count.
   */
      void
  dict_free(d, recurse)
      dict_T  *d;
      int	    recurse;	/* Free Lists and Dictionaries recursively. */
  {
      int		todo;
      hashitem_T	*hi;
      dictitem_T	*di;
  
      /* Remove the dict from the list of dicts for garbage collection. */
      if (d->dv_used_prev == NULL)
  	first_dict = d->dv_used_next;
      else
  	d->dv_used_prev->dv_used_next = d->dv_used_next;
      if (d->dv_used_next != NULL)
  	d->dv_used_next->dv_used_prev = d->dv_used_prev;
  
      /* Lock the hashtab, we don't want it to resize while freeing items. */
      hash_lock(&d->dv_hashtab);
      todo = (int)d->dv_hashtab.ht_used;
      for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
      {
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    /* Remove the item before deleting it, just in case there is
  	     * something recursive causing trouble. */
  	    di = HI2DI(hi);
  	    hash_remove(&d->dv_hashtab, hi);
  	    if (recurse || (di->di_tv.v_type != VAR_LIST
  					     && di->di_tv.v_type != VAR_DICT))
  		clear_tv(&di->di_tv);
  	    vim_free(di);
  	    --todo;
  	}
      }
      hash_clear(&d->dv_hashtab);
      vim_free(d);
  }
  
  /*
   * Allocate a Dictionary item.
   * The "key" is copied to the new item.
   * Note that the value of the item "di_tv" still needs to be initialized!
   * Returns NULL when out of memory.
   */
      dictitem_T *
  dictitem_alloc(key)
      char_u	*key;
  {
      dictitem_T *di;
  
      di = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T) + STRLEN(key)));
      if (di != NULL)
      {
  	STRCPY(di->di_key, key);
  	di->di_flags = DI_FLAGS_ALLOC;
      }
      return di;
  }
  
  /*
   * Make a copy of a Dictionary item.
   */
      static dictitem_T *
  dictitem_copy(org)
      dictitem_T *org;
  {
      dictitem_T *di;
  
      di = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
  						      + STRLEN(org->di_key)));
      if (di != NULL)
      {
  	STRCPY(di->di_key, org->di_key);
  	di->di_flags = DI_FLAGS_ALLOC;
  	copy_tv(&org->di_tv, &di->di_tv);
      }
      return di;
  }
  
  /*
   * Remove item "item" from Dictionary "dict" and free it.
   */
      static void
  dictitem_remove(dict, item)
      dict_T	*dict;
      dictitem_T	*item;
  {
      hashitem_T	*hi;
  
      hi = hash_find(&dict->dv_hashtab, item->di_key);
      if (HASHITEM_EMPTY(hi))
  	EMSG2(_(e_intern2), "dictitem_remove()");
      else
  	hash_remove(&dict->dv_hashtab, hi);
      dictitem_free(item);
  }
  
  /*
   * Free a dict item.  Also clears the value.
   */
      void
  dictitem_free(item)
      dictitem_T *item;
  {
      clear_tv(&item->di_tv);
      if (item->di_flags & DI_FLAGS_ALLOC)
  	vim_free(item);
  }
  
  /*
   * Make a copy of dict "d".  Shallow if "deep" is FALSE.
   * The refcount of the new dict is set to 1.
   * See item_copy() for "copyID".
   * Returns NULL when out of memory.
   */
      static dict_T *
  dict_copy(orig, deep, copyID)
      dict_T	*orig;
      int		deep;
      int		copyID;
  {
      dict_T	*copy;
      dictitem_T	*di;
      int		todo;
      hashitem_T	*hi;
  
      if (orig == NULL)
  	return NULL;
  
      copy = dict_alloc();
      if (copy != NULL)
      {
  	if (copyID != 0)
  	{
  	    orig->dv_copyID = copyID;
  	    orig->dv_copydict = copy;
  	}
  	todo = (int)orig->dv_hashtab.ht_used;
  	for (hi = orig->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
  	{
  	    if (!HASHITEM_EMPTY(hi))
  	    {
  		--todo;
  
  		di = dictitem_alloc(hi->hi_key);
  		if (di == NULL)
  		    break;
  		if (deep)
  		{
  		    if (item_copy(&HI2DI(hi)->di_tv, &di->di_tv, deep,
  							      copyID) == FAIL)
  		    {
  			vim_free(di);
  			break;
  		    }
  		}
  		else
  		    copy_tv(&HI2DI(hi)->di_tv, &di->di_tv);
  		if (dict_add(copy, di) == FAIL)
  		{
  		    dictitem_free(di);
  		    break;
  		}
  	    }
  	}
  
  	++copy->dv_refcount;
  	if (todo > 0)
  	{
  	    dict_unref(copy);
  	    copy = NULL;
  	}
      }
  
      return copy;
  }
  
  /*
   * Add item "item" to Dictionary "d".
   * Returns FAIL when out of memory and when key already exists.
   */
      int
  dict_add(d, item)
      dict_T	*d;
      dictitem_T	*item;
  {
      return hash_add(&d->dv_hashtab, item->di_key);
  }
  
  /*
   * Add a number or string entry to dictionary "d".
   * When "str" is NULL use number "nr", otherwise use "str".
   * Returns FAIL when out of memory and when key already exists.
   */
      int
  dict_add_nr_str(d, key, nr, str)
      dict_T	*d;
      char	*key;
      long	nr;
      char_u	*str;
  {
      dictitem_T	*item;
  
      item = dictitem_alloc((char_u *)key);
      if (item == NULL)
  	return FAIL;
      item->di_tv.v_lock = 0;
      if (str == NULL)
      {
  	item->di_tv.v_type = VAR_NUMBER;
  	item->di_tv.vval.v_number = nr;
      }
      else
      {
  	item->di_tv.v_type = VAR_STRING;
  	item->di_tv.vval.v_string = vim_strsave(str);
      }
      if (dict_add(d, item) == FAIL)
      {
  	dictitem_free(item);
  	return FAIL;
      }
      return OK;
  }
  
  /*
   * Add a list entry to dictionary "d".
   * Returns FAIL when out of memory and when key already exists.
   */
      int
  dict_add_list(d, key, list)
      dict_T	*d;
      char	*key;
      list_T	*list;
  {
      dictitem_T	*item;
  
      item = dictitem_alloc((char_u *)key);
      if (item == NULL)
  	return FAIL;
      item->di_tv.v_lock = 0;
      item->di_tv.v_type = VAR_LIST;
      item->di_tv.vval.v_list = list;
      if (dict_add(d, item) == FAIL)
      {
  	dictitem_free(item);
  	return FAIL;
      }
      ++list->lv_refcount;
      return OK;
  }
  
  /*
   * Get the number of items in a Dictionary.
   */
      static long
  dict_len(d)
      dict_T	*d;
  {
      if (d == NULL)
  	return 0L;
      return (long)d->dv_hashtab.ht_used;
  }
  
  /*
   * Find item "key[len]" in Dictionary "d".
   * If "len" is negative use strlen(key).
   * Returns NULL when not found.
   */
      dictitem_T *
  dict_find(d, key, len)
      dict_T	*d;
      char_u	*key;
      int		len;
  {
  #define AKEYLEN 200
      char_u	buf[AKEYLEN];
      char_u	*akey;
      char_u	*tofree = NULL;
      hashitem_T	*hi;
  
      if (len < 0)
  	akey = key;
      else if (len >= AKEYLEN)
      {
  	tofree = akey = vim_strnsave(key, len);
  	if (akey == NULL)
  	    return NULL;
      }
      else
      {
  	/* Avoid a malloc/free by using buf[]. */
  	vim_strncpy(buf, key, len);
  	akey = buf;
      }
  
      hi = hash_find(&d->dv_hashtab, akey);
      vim_free(tofree);
      if (HASHITEM_EMPTY(hi))
  	return NULL;
      return HI2DI(hi);
  }
  
  /*
   * Get a string item from a dictionary.
   * When "save" is TRUE allocate memory for it.
   * Returns NULL if the entry doesn't exist or out of memory.
   */
      char_u *
  get_dict_string(d, key, save)
      dict_T	*d;
      char_u	*key;
      int		save;
  {
      dictitem_T	*di;
      char_u	*s;
  
      di = dict_find(d, key, -1);
      if (di == NULL)
  	return NULL;
      s = get_tv_string(&di->di_tv);
      if (save && s != NULL)
  	s = vim_strsave(s);
      return s;
  }
  
  /*
   * Get a number item from a dictionary.
   * Returns 0 if the entry doesn't exist or out of memory.
   */
      long
  get_dict_number(d, key)
      dict_T	*d;
      char_u	*key;
  {
      dictitem_T	*di;
  
      di = dict_find(d, key, -1);
      if (di == NULL)
  	return 0;
      return get_tv_number(&di->di_tv);
  }
  
  /*
   * Return an allocated string with the string representation of a Dictionary.
   * May return NULL.
   */
      static char_u *
  dict2string(tv, copyID)
      typval_T	*tv;
      int		copyID;
  {
      garray_T	ga;
      int		first = TRUE;
      char_u	*tofree;
      char_u	numbuf[NUMBUFLEN];
      hashitem_T	*hi;
      char_u	*s;
      dict_T	*d;
      int		todo;
  
      if ((d = tv->vval.v_dict) == NULL)
  	return NULL;
      ga_init2(&ga, (int)sizeof(char), 80);
      ga_append(&ga, '{');
  
      todo = (int)d->dv_hashtab.ht_used;
      for (hi = d->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
      {
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    --todo;
  
  	    if (first)
  		first = FALSE;
  	    else
  		ga_concat(&ga, (char_u *)", ");
  
  	    tofree = string_quote(hi->hi_key, FALSE);
  	    if (tofree != NULL)
  	    {
  		ga_concat(&ga, tofree);
  		vim_free(tofree);
  	    }
  	    ga_concat(&ga, (char_u *)": ");
  	    s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf, copyID);
  	    if (s != NULL)
  		ga_concat(&ga, s);
  	    vim_free(tofree);
  	    if (s == NULL || did_echo_string_emsg)
  		break;
  	    line_breakcheck();
  
  	}
      }
      if (todo > 0)
      {
  	vim_free(ga.ga_data);
  	return NULL;
      }
  
      ga_append(&ga, '}');
      ga_append(&ga, NUL);
      return (char_u *)ga.ga_data;
  }
  
  /*
   * Allocate a variable for a Dictionary and fill it from "*arg".
   * Return OK or FAIL.  Returns NOTDONE for {expr}.
   */
      static int
  get_dict_tv(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
  {
      dict_T	*d = NULL;
      typval_T	tvkey;
      typval_T	tv;
      char_u	*key = NULL;
      dictitem_T	*item;
      char_u	*start = skipwhite(*arg + 1);
      char_u	buf[NUMBUFLEN];
  
      /*
       * First check if it's not a curly-braces thing: {expr}.
       * Must do this without evaluating, otherwise a function may be called
       * twice.  Unfortunately this means we need to call eval1() twice for the
       * first item.
       * But {} is an empty Dictionary.
       */
      if (*start != '}')
      {
  	if (eval1(&start, &tv, FALSE) == FAIL)	/* recursive! */
  	    return FAIL;
  	if (*start == '}')
  	    return NOTDONE;
      }
  
      if (evaluate)
      {
  	d = dict_alloc();
  	if (d == NULL)
  	    return FAIL;
      }
      tvkey.v_type = VAR_UNKNOWN;
      tv.v_type = VAR_UNKNOWN;
  
      *arg = skipwhite(*arg + 1);
      while (**arg != '}' && **arg != NUL)
      {
  	if (eval1(arg, &tvkey, evaluate) == FAIL)	/* recursive! */
  	    goto failret;
  	if (**arg != ':')
  	{
  	    EMSG2(_("E720: Missing colon in Dictionary: %s"), *arg);
  	    clear_tv(&tvkey);
  	    goto failret;
  	}
  	if (evaluate)
  	{
  	    key = get_tv_string_buf_chk(&tvkey, buf);
  	    if (key == NULL || *key == NUL)
  	    {
  		/* "key" is NULL when get_tv_string_buf_chk() gave an errmsg */
  		if (key != NULL)
  		    EMSG(_(e_emptykey));
  		clear_tv(&tvkey);
  		goto failret;
  	    }
  	}
  
  	*arg = skipwhite(*arg + 1);
  	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
  	{
  	    if (evaluate)
  		clear_tv(&tvkey);
  	    goto failret;
  	}
  	if (evaluate)
  	{
  	    item = dict_find(d, key, -1);
  	    if (item != NULL)
  	    {
  		EMSG2(_("E721: Duplicate key in Dictionary: \"%s\""), key);
  		clear_tv(&tvkey);
  		clear_tv(&tv);
  		goto failret;
  	    }
  	    item = dictitem_alloc(key);
  	    clear_tv(&tvkey);
  	    if (item != NULL)
  	    {
  		item->di_tv = tv;
  		item->di_tv.v_lock = 0;
  		if (dict_add(d, item) == FAIL)
  		    dictitem_free(item);
  	    }
  	}
  
  	if (**arg == '}')
  	    break;
  	if (**arg != ',')
  	{
  	    EMSG2(_("E722: Missing comma in Dictionary: %s"), *arg);
  	    goto failret;
  	}
  	*arg = skipwhite(*arg + 1);
      }
  
      if (**arg != '}')
      {
  	EMSG2(_("E723: Missing end of Dictionary '}': %s"), *arg);
  failret:
  	if (evaluate)
  	    dict_free(d, TRUE);
  	return FAIL;
      }
  
      *arg = skipwhite(*arg + 1);
      if (evaluate)
      {
  	rettv->v_type = VAR_DICT;
  	rettv->vval.v_dict = d;
  	++d->dv_refcount;
      }
  
      return OK;
  }
  
  /*
   * Return a string with the string representation of a variable.
   * If the memory is allocated "tofree" is set to it, otherwise NULL.
   * "numbuf" is used for a number.
   * Does not put quotes around strings, as ":echo" displays values.
   * When "copyID" is not NULL replace recursive lists and dicts with "...".
   * May return NULL.
   */
      static char_u *
  echo_string(tv, tofree, numbuf, copyID)
      typval_T	*tv;
      char_u	**tofree;
      char_u	*numbuf;
      int		copyID;
  {
      static int	recurse = 0;
      char_u	*r = NULL;
  
      if (recurse >= DICT_MAXNEST)
      {
  	if (!did_echo_string_emsg)
  	{
  	    /* Only give this message once for a recursive call to avoid
  	     * flooding the user with errors.  And stop iterating over lists
  	     * and dicts. */
  	    did_echo_string_emsg = TRUE;
  	    EMSG(_("E724: variable nested too deep for displaying"));
  	}
  	*tofree = NULL;
  	return (char_u *)"{E724}";
      }
      ++recurse;
  
      switch (tv->v_type)
      {
  	case VAR_FUNC:
  	    *tofree = NULL;
  	    r = tv->vval.v_string;
  	    break;
  
  	case VAR_LIST:
  	    if (tv->vval.v_list == NULL)
  	    {
  		*tofree = NULL;
  		r = NULL;
  	    }
  	    else if (copyID != 0 && tv->vval.v_list->lv_copyID == copyID)
  	    {
  		*tofree = NULL;
  		r = (char_u *)"[...]";
  	    }
  	    else
  	    {
  		tv->vval.v_list->lv_copyID = copyID;
  		*tofree = list2string(tv, copyID);
  		r = *tofree;
  	    }
  	    break;
  
  	case VAR_DICT:
  	    if (tv->vval.v_dict == NULL)
  	    {
  		*tofree = NULL;
  		r = NULL;
  	    }
  	    else if (copyID != 0 && tv->vval.v_dict->dv_copyID == copyID)
  	    {
  		*tofree = NULL;
  		r = (char_u *)"{...}";
  	    }
  	    else
  	    {
  		tv->vval.v_dict->dv_copyID = copyID;
  		*tofree = dict2string(tv, copyID);
  		r = *tofree;
  	    }
  	    break;
  
  	case VAR_STRING:
  	case VAR_NUMBER:
  	    *tofree = NULL;
  	    r = get_tv_string_buf(tv, numbuf);
  	    break;
  
  #ifdef FEAT_FLOAT
  	case VAR_FLOAT:
  	    *tofree = NULL;
  	    vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv->vval.v_float);
  	    r = numbuf;
  	    break;
  #endif
  
  	default:
  	    EMSG2(_(e_intern2), "echo_string()");
  	    *tofree = NULL;
      }
  
      if (--recurse == 0)
  	did_echo_string_emsg = FALSE;
      return r;
  }
  
  /*
   * Return a string with the string representation of a variable.
   * If the memory is allocated "tofree" is set to it, otherwise NULL.
   * "numbuf" is used for a number.
   * Puts quotes around strings, so that they can be parsed back by eval().
   * May return NULL.
   */
      static char_u *
  tv2string(tv, tofree, numbuf, copyID)
      typval_T	*tv;
      char_u	**tofree;
      char_u	*numbuf;
      int		copyID;
  {
      switch (tv->v_type)
      {
  	case VAR_FUNC:
  	    *tofree = string_quote(tv->vval.v_string, TRUE);
  	    return *tofree;
  	case VAR_STRING:
  	    *tofree = string_quote(tv->vval.v_string, FALSE);
  	    return *tofree;
  #ifdef FEAT_FLOAT
  	case VAR_FLOAT:
  	    *tofree = NULL;
  	    vim_snprintf((char *)numbuf, NUMBUFLEN - 1, "%g", tv->vval.v_float);
  	    return numbuf;
  #endif
  	case VAR_NUMBER:
  	case VAR_LIST:
  	case VAR_DICT:
  	    break;
  	default:
  	    EMSG2(_(e_intern2), "tv2string()");
      }
      return echo_string(tv, tofree, numbuf, copyID);
  }
  
  /*
   * Return string "str" in ' quotes, doubling ' characters.
   * If "str" is NULL an empty string is assumed.
   * If "function" is TRUE make it function('string').
   */
      static char_u *
  string_quote(str, function)
      char_u	*str;
      int		function;
  {
      unsigned	len;
      char_u	*p, *r, *s;
  
      len = (function ? 13 : 3);
      if (str != NULL)
      {
  	len += (unsigned)STRLEN(str);
  	for (p = str; *p != NUL; mb_ptr_adv(p))
  	    if (*p == '\'')
  		++len;
      }
      s = r = alloc(len);
      if (r != NULL)
      {
  	if (function)
  	{
  	    STRCPY(r, "function('");
  	    r += 10;
  	}
  	else
  	    *r++ = '\'';
  	if (str != NULL)
  	    for (p = str; *p != NUL; )
  	    {
  		if (*p == '\'')
  		    *r++ = '\'';
  		MB_COPY_CHAR(p, r);
  	    }
  	*r++ = '\'';
  	if (function)
  	    *r++ = ')';
  	*r++ = NUL;
      }
      return s;
  }
  
  #ifdef FEAT_FLOAT
  /*
   * Convert the string "text" to a floating point number.
   * This uses strtod().  setlocale(LC_NUMERIC, "C") has been used to make sure
   * this always uses a decimal point.
   * Returns the length of the text that was consumed.
   */
      static int
  string2float(text, value)
      char_u	*text;
      float_T	*value;	    /* result stored here */
  {
      char	*s = (char *)text;
      float_T	f;
  
      f = strtod(s, &s);
      *value = f;
      return (int)((char_u *)s - text);
  }
  #endif
  
  /*
   * Get the value of an environment variable.
   * "arg" is pointing to the '$'.  It is advanced to after the name.
   * If the environment variable was not set, silently assume it is empty.
   * Return FAIL if the name is invalid.
   */
      static int
  get_env_tv(arg, rettv, evaluate)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;
  {
      char_u	*string = NULL;
      int		len;
      int		cc;
      char_u	*name;
      int		mustfree = FALSE;
  
      ++*arg;
      name = *arg;
      len = get_env_len(arg);
      if (evaluate)
      {
  	if (len == 0)
  	    return FAIL; /* invalid empty name */
  
  	cc = name[len];
  	name[len] = NUL;
  	/* first try vim_getenv(), fast for normal environment vars */
  	string = vim_getenv(name, &mustfree);
  	if (string != NULL && *string != NUL)
  	{
  	    if (!mustfree)
  		string = vim_strsave(string);
  	}
  	else
  	{
  	    if (mustfree)
  		vim_free(string);
  
  	    /* next try expanding things like $VIM and ${HOME} */
  	    string = expand_env_save(name - 1);
  	    if (string != NULL && *string == '$')
  	    {
  		vim_free(string);
  		string = NULL;
  	    }
  	}
  	name[len] = cc;
  
  	rettv->v_type = VAR_STRING;
  	rettv->vval.v_string = string;
      }
  
      return OK;
  }
  
  /*
   * Array with names and number of arguments of all internal functions
   * MUST BE KEPT SORTED IN strcmp() ORDER FOR BINARY SEARCH!
   */
  static struct fst
  {
      char	*f_name;	/* function name */
      char	f_min_argc;	/* minimal number of arguments */
      char	f_max_argc;	/* maximal number of arguments */
      void	(*f_func) __ARGS((typval_T *args, typval_T *rvar));
  				/* implementation of function */
  } functions[] =
  {
  #ifdef FEAT_FLOAT
      {"abs",		1, 1, f_abs},
      {"acos",		1, 1, f_acos},	/* WJMc */
  #endif
      {"add",		2, 2, f_add},
      {"and",		2, 2, f_and},
      {"append",		2, 2, f_append},
      {"argc",		0, 0, f_argc},
      {"argidx",		0, 0, f_argidx},
      {"arglistid",	0, 2, f_arglistid},
      {"argv",		0, 1, f_argv},
  #ifdef FEAT_FLOAT
      {"asin",		1, 1, f_asin},	/* WJMc */
      {"atan",		1, 1, f_atan},
      {"atan2",		2, 2, f_atan2},
  #endif
      {"browse",		4, 4, f_browse},
      {"browsedir",	2, 2, f_browsedir},
      {"bufexists",	1, 1, f_bufexists},
      {"buffer_exists",	1, 1, f_bufexists},	/* obsolete */
      {"buffer_name",	1, 1, f_bufname},	/* obsolete */
      {"buffer_number",	1, 1, f_bufnr},		/* obsolete */
      {"buflisted",	1, 1, f_buflisted},
      {"bufloaded",	1, 1, f_bufloaded},
      {"bufname",		1, 1, f_bufname},
      {"bufnr",		1, 2, f_bufnr},
      {"bufwinnr",	1, 1, f_bufwinnr},
      {"byte2line",	1, 1, f_byte2line},
      {"byteidx",		2, 2, f_byteidx},
      {"byteidxcomp",	2, 2, f_byteidxcomp},
      {"call",		2, 3, f_call},
  #ifdef FEAT_FLOAT
      {"ceil",		1, 1, f_ceil},
  #endif
      {"changenr",	0, 0, f_changenr},
      {"char2nr",		1, 2, f_char2nr},
      {"cindent",		1, 1, f_cindent},
      {"clearmatches",	0, 0, f_clearmatches},
      {"col",		1, 1, f_col},
  #if defined(FEAT_INS_EXPAND)
      {"complete",	2, 2, f_complete},
      {"complete_add",	1, 1, f_complete_add},
      {"complete_check",	0, 0, f_complete_check},
  #endif
      {"confirm",		1, 4, f_confirm},
      {"copy",		1, 1, f_copy},
  #ifdef FEAT_FLOAT
      {"cos",		1, 1, f_cos},
      {"cosh",		1, 1, f_cosh},
  #endif
      {"count",		2, 4, f_count},
      {"cscope_connection",0,3, f_cscope_connection},
      {"cursor",		1, 3, f_cursor},
      {"deepcopy",	1, 2, f_deepcopy},
      {"delete",		1, 1, f_delete},
      {"did_filetype",	0, 0, f_did_filetype},
      {"diff_filler",	1, 1, f_diff_filler},
      {"diff_hlID",	2, 2, f_diff_hlID},
      {"empty",		1, 1, f_empty},
      {"escape",		2, 2, f_escape},
      {"eval",		1, 1, f_eval},
      {"eventhandler",	0, 0, f_eventhandler},
      {"executable",	1, 1, f_executable},
      {"exepath",		1, 1, f_exepath},
      {"exists",		1, 1, f_exists},
  #ifdef FEAT_FLOAT
      {"exp",		1, 1, f_exp},
  #endif
      {"expand",		1, 3, f_expand},
      {"extend",		2, 3, f_extend},
      {"feedkeys",	1, 2, f_feedkeys},
      {"file_readable",	1, 1, f_filereadable},	/* obsolete */
      {"filereadable",	1, 1, f_filereadable},
      {"filewritable",	1, 1, f_filewritable},
      {"filter",		2, 2, f_filter},
      {"finddir",		1, 3, f_finddir},
      {"findfile",	1, 3, f_findfile},
  #ifdef FEAT_FLOAT
      {"float2nr",	1, 1, f_float2nr},
      {"floor",		1, 1, f_floor},
      {"fmod",		2, 2, f_fmod},
  #endif
      {"fnameescape",	1, 1, f_fnameescape},
      {"fnamemodify",	2, 2, f_fnamemodify},
      {"foldclosed",	1, 1, f_foldclosed},
      {"foldclosedend",	1, 1, f_foldclosedend},
      {"foldlevel",	1, 1, f_foldlevel},
      {"foldtext",	0, 0, f_foldtext},
      {"foldtextresult",	1, 1, f_foldtextresult},
      {"foreground",	0, 0, f_foreground},
      {"function",	1, 1, f_function},
      {"garbagecollect",	0, 1, f_garbagecollect},
      {"get",		2, 3, f_get},
      {"getbufline",	2, 3, f_getbufline},
      {"getbufvar",	2, 3, f_getbufvar},
      {"getchar",		0, 1, f_getchar},
      {"getcharmod",	0, 0, f_getcharmod},
      {"getcmdline",	0, 0, f_getcmdline},
      {"getcmdpos",	0, 0, f_getcmdpos},
      {"getcmdtype",	0, 0, f_getcmdtype},
      {"getcmdwintype",	0, 0, f_getcmdwintype},
      {"getcurpos",	0, 0, f_getcurpos},
      {"getcwd",		0, 0, f_getcwd},
      {"getfontname",	0, 1, f_getfontname},
      {"getfperm",	1, 1, f_getfperm},
      {"getfsize",	1, 1, f_getfsize},
      {"getftime",	1, 1, f_getftime},
      {"getftype",	1, 1, f_getftype},
      {"getline",		1, 2, f_getline},
      {"getloclist",	1, 1, f_getqflist},
      {"getmatches",	0, 0, f_getmatches},
      {"getpid",		0, 0, f_getpid},
      {"getpos",		1, 1, f_getpos},
      {"getqflist",	0, 0, f_getqflist},
      {"getreg",		0, 3, f_getreg},
      {"getregtype",	0, 1, f_getregtype},
      {"gettabvar",	2, 3, f_gettabvar},
      {"gettabwinvar",	3, 4, f_gettabwinvar},
      {"getwinposx",	0, 0, f_getwinposx},
      {"getwinposy",	0, 0, f_getwinposy},
      {"getwinvar",	2, 3, f_getwinvar},
      {"glob",		1, 4, f_glob},
      {"glob2regpat",	1, 1, f_glob2regpat},
      {"globpath",	2, 5, f_globpath},
      {"has",		1, 1, f_has},
      {"has_key",		2, 2, f_has_key},
      {"haslocaldir",	0, 0, f_haslocaldir},
      {"hasmapto",	1, 3, f_hasmapto},
      {"highlightID",	1, 1, f_hlID},		/* obsolete */
      {"highlight_exists",1, 1, f_hlexists},	/* obsolete */
      {"histadd",		2, 2, f_histadd},
      {"histdel",		1, 2, f_histdel},
      {"histget",		1, 2, f_histget},
      {"histnr",		1, 1, f_histnr},
      {"hlID",		1, 1, f_hlID},
      {"hlexists",	1, 1, f_hlexists},
      {"hostname",	0, 0, f_hostname},
      {"iconv",		3, 3, f_iconv},
      {"indent",		1, 1, f_indent},
      {"index",		2, 4, f_index},
      {"input",		1, 3, f_input},
      {"inputdialog",	1, 3, f_inputdialog},
      {"inputlist",	1, 1, f_inputlist},
      {"inputrestore",	0, 0, f_inputrestore},
      {"inputsave",	0, 0, f_inputsave},
      {"inputsecret",	1, 2, f_inputsecret},
      {"insert",		2, 3, f_insert},
      {"invert",		1, 1, f_invert},
      {"isdirectory",	1, 1, f_isdirectory},
      {"islocked",	1, 1, f_islocked},
      {"items",		1, 1, f_items},
      {"join",		1, 2, f_join},
      {"keys",		1, 1, f_keys},
      {"last_buffer_nr",	0, 0, f_last_buffer_nr},/* obsolete */
      {"len",		1, 1, f_len},
      {"libcall",		3, 3, f_libcall},
      {"libcallnr",	3, 3, f_libcallnr},
      {"line",		1, 1, f_line},
      {"line2byte",	1, 1, f_line2byte},
      {"lispindent",	1, 1, f_lispindent},
      {"localtime",	0, 0, f_localtime},
  #ifdef FEAT_FLOAT
      {"log",		1, 1, f_log},
      {"log10",		1, 1, f_log10},
  #endif
  #ifdef FEAT_LUA
      {"luaeval",		1, 2, f_luaeval},
  #endif
      {"map",		2, 2, f_map},
      {"maparg",		1, 4, f_maparg},
      {"mapcheck",	1, 3, f_mapcheck},
      {"match",		2, 4, f_match},
      {"matchadd",	2, 4, f_matchadd},
      {"matchaddpos",	2, 4, f_matchaddpos},
      {"matcharg",	1, 1, f_matcharg},
      {"matchdelete",	1, 1, f_matchdelete},
      {"matchend",	2, 4, f_matchend},
      {"matchlist",	2, 4, f_matchlist},
      {"matchstr",	2, 4, f_matchstr},
      {"max",		1, 1, f_max},
      {"min",		1, 1, f_min},
  #ifdef vim_mkdir
      {"mkdir",		1, 3, f_mkdir},
  #endif
      {"mode",		0, 1, f_mode},
  #ifdef FEAT_MZSCHEME
      {"mzeval",		1, 1, f_mzeval},
  #endif
      {"nextnonblank",	1, 1, f_nextnonblank},
      {"nr2char",		1, 2, f_nr2char},
      {"or",		2, 2, f_or},
      {"pathshorten",	1, 1, f_pathshorten},
  #ifdef FEAT_FLOAT
      {"pow",		2, 2, f_pow},
  #endif
      {"prevnonblank",	1, 1, f_prevnonblank},
      {"printf",		2, 19, f_printf},
      {"pumvisible",	0, 0, f_pumvisible},
  #ifdef FEAT_PYTHON3
      {"py3eval",		1, 1, f_py3eval},
  #endif
  #ifdef FEAT_PYTHON
      {"pyeval",		1, 1, f_pyeval},
  #endif
      {"range",		1, 3, f_range},
      {"readfile",	1, 3, f_readfile},
      {"reltime",		0, 2, f_reltime},
      {"reltimestr",	1, 1, f_reltimestr},
      {"remote_expr",	2, 3, f_remote_expr},
      {"remote_foreground", 1, 1, f_remote_foreground},
      {"remote_peek",	1, 2, f_remote_peek},
      {"remote_read",	1, 1, f_remote_read},
      {"remote_send",	2, 3, f_remote_send},
      {"remove",		2, 3, f_remove},
      {"rename",		2, 2, f_rename},
      {"repeat",		2, 2, f_repeat},
      {"resolve",		1, 1, f_resolve},
      {"reverse",		1, 1, f_reverse},
  #ifdef FEAT_FLOAT
      {"round",		1, 1, f_round},
  #endif
      {"screenattr",	2, 2, f_screenattr},
      {"screenchar",	2, 2, f_screenchar},
      {"screencol",	0, 0, f_screencol},
      {"screenrow",	0, 0, f_screenrow},
      {"search",		1, 4, f_search},
      {"searchdecl",	1, 3, f_searchdecl},
      {"searchpair",	3, 7, f_searchpair},
      {"searchpairpos",	3, 7, f_searchpairpos},
      {"searchpos",	1, 4, f_searchpos},
      {"server2client",	2, 2, f_server2client},
      {"serverlist",	0, 0, f_serverlist},
      {"setbufvar",	3, 3, f_setbufvar},
      {"setcmdpos",	1, 1, f_setcmdpos},
      {"setline",		2, 2, f_setline},
      {"setloclist",	2, 3, f_setloclist},
      {"setmatches",	1, 1, f_setmatches},
      {"setpos",		2, 2, f_setpos},
      {"setqflist",	1, 2, f_setqflist},
      {"setreg",		2, 3, f_setreg},
      {"settabvar",	3, 3, f_settabvar},
      {"settabwinvar",	4, 4, f_settabwinvar},
      {"setwinvar",	3, 3, f_setwinvar},
  #ifdef FEAT_CRYPT
      {"sha256",		1, 1, f_sha256},
  #endif
      {"shellescape",	1, 2, f_shellescape},
      {"shiftwidth",	0, 0, f_shiftwidth},
      {"simplify",	1, 1, f_simplify},
  #ifdef FEAT_FLOAT
      {"sin",		1, 1, f_sin},
      {"sinh",		1, 1, f_sinh},
  #endif
      {"sort",		1, 3, f_sort},
      {"soundfold",	1, 1, f_soundfold},
      {"spellbadword",	0, 1, f_spellbadword},
      {"spellsuggest",	1, 3, f_spellsuggest},
      {"split",		1, 3, f_split},
  #ifdef FEAT_FLOAT
      {"sqrt",		1, 1, f_sqrt},
      {"str2float",	1, 1, f_str2float},
  #endif
      {"str2nr",		1, 2, f_str2nr},
      {"strchars",	1, 2, f_strchars},
      {"strdisplaywidth",	1, 2, f_strdisplaywidth},
  #ifdef HAVE_STRFTIME
      {"strftime",	1, 2, f_strftime},
  #endif
      {"stridx",		2, 3, f_stridx},
      {"string",		1, 1, f_string},
      {"strlen",		1, 1, f_strlen},
      {"strpart",		2, 3, f_strpart},
      {"strridx",		2, 3, f_strridx},
      {"strtrans",	1, 1, f_strtrans},
      {"strwidth",	1, 1, f_strwidth},
      {"submatch",	1, 2, f_submatch},
      {"substitute",	4, 4, f_substitute},
      {"synID",		3, 3, f_synID},
      {"synIDattr",	2, 3, f_synIDattr},
      {"synIDtrans",	1, 1, f_synIDtrans},
      {"synconcealed",	2, 2, f_synconcealed},
      {"synstack",	2, 2, f_synstack},
      {"system",		1, 2, f_system},
      {"systemlist",	1, 2, f_systemlist},
      {"tabpagebuflist",	0, 1, f_tabpagebuflist},
      {"tabpagenr",	0, 1, f_tabpagenr},
      {"tabpagewinnr",	1, 2, f_tabpagewinnr},
      {"tagfiles",	0, 0, f_tagfiles},
      {"taglist",		1, 1, f_taglist},
  #ifdef FEAT_FLOAT
      {"tan",		1, 1, f_tan},
      {"tanh",		1, 1, f_tanh},
  #endif
      {"tempname",	0, 0, f_tempname},
      {"test",		1, 1, f_test},
      {"tolower",		1, 1, f_tolower},
      {"toupper",		1, 1, f_toupper},
      {"tr",		3, 3, f_tr},
  #ifdef FEAT_FLOAT
      {"trunc",		1, 1, f_trunc},
  #endif
      {"type",		1, 1, f_type},
      {"undofile",	1, 1, f_undofile},
      {"undotree",	0, 0, f_undotree},
      {"uniq",		1, 3, f_uniq},
      {"values",		1, 1, f_values},
      {"virtcol",		1, 1, f_virtcol},
      {"visualmode",	0, 1, f_visualmode},
      {"wildmenumode",	0, 0, f_wildmenumode},
      {"winbufnr",	1, 1, f_winbufnr},
      {"wincol",		0, 0, f_wincol},
      {"winheight",	1, 1, f_winheight},
      {"winline",		0, 0, f_winline},
      {"winnr",		0, 1, f_winnr},
      {"winrestcmd",	0, 0, f_winrestcmd},
      {"winrestview",	1, 1, f_winrestview},
      {"winsaveview",	0, 0, f_winsaveview},
      {"winwidth",	1, 1, f_winwidth},
      {"writefile",	2, 3, f_writefile},
      {"xor",		2, 2, f_xor},
  };
  
  #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
  
  /*
   * Function given to ExpandGeneric() to obtain the list of internal
   * or user defined function names.
   */
      char_u *
  get_function_name(xp, idx)
      expand_T	*xp;
      int		idx;
  {
      static int	intidx = -1;
      char_u	*name;
  
      if (idx == 0)
  	intidx = -1;
      if (intidx < 0)
      {
  	name = get_user_func_name(xp, idx);
  	if (name != NULL)
  	    return name;
      }
      if (++intidx < (int)(sizeof(functions) / sizeof(struct fst)))
      {
  	STRCPY(IObuff, functions[intidx].f_name);
  	STRCAT(IObuff, "(");
  	if (functions[intidx].f_max_argc == 0)
  	    STRCAT(IObuff, ")");
  	return IObuff;
      }
  
      return NULL;
  }
  
  /*
   * Function given to ExpandGeneric() to obtain the list of internal or
   * user defined variable or function names.
   */
      char_u *
  get_expr_name(xp, idx)
      expand_T	*xp;
      int		idx;
  {
      static int	intidx = -1;
      char_u	*name;
  
      if (idx == 0)
  	intidx = -1;
      if (intidx < 0)
      {
  	name = get_function_name(xp, idx);
  	if (name != NULL)
  	    return name;
      }
      return get_user_var_name(xp, ++intidx);
  }
  
  #endif /* FEAT_CMDL_COMPL */
  
  #if defined(EBCDIC) || defined(PROTO)
  /*
   * Compare struct fst by function name.
   */
      static int
  compare_func_name(s1, s2)
      const void *s1;
      const void *s2;
  {
      struct fst *p1 = (struct fst *)s1;
      struct fst *p2 = (struct fst *)s2;
  
      return STRCMP(p1->f_name, p2->f_name);
  }
  
  /*
   * Sort the function table by function name.
   * The sorting of the table above is ASCII dependant.
   * On machines using EBCDIC we have to sort it.
   */
      static void
  sortFunctions()
  {
      int		funcCnt = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
  
      qsort(functions, (size_t)funcCnt, sizeof(struct fst), compare_func_name);
  }
  #endif
  
  
  /*
   * Find internal function in table above.
   * Return index, or -1 if not found
   */
      static int
  find_internal_func(name)
      char_u	*name;		/* name of the function */
  {
      int		first = 0;
      int		last = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
      int		cmp;
      int		x;
  
      /*
       * Find the function name in the table. Binary search.
       */
      while (first <= last)
      {
  	x = first + ((unsigned)(last - first) >> 1);
  	cmp = STRCMP(name, functions[x].f_name);
  	if (cmp < 0)
  	    last = x - 1;
  	else if (cmp > 0)
  	    first = x + 1;
  	else
  	    return x;
      }
      return -1;
  }
  
  /*
   * Check if "name" is a variable of type VAR_FUNC.  If so, return the function
   * name it contains, otherwise return "name".
   */
      static char_u *
  deref_func_name(name, lenp, no_autoload)
      char_u	*name;
      int		*lenp;
      int		no_autoload;
  {
      dictitem_T	*v;
      int		cc;
  
      cc = name[*lenp];
      name[*lenp] = NUL;
      v = find_var(name, NULL, no_autoload);
      name[*lenp] = cc;
      if (v != NULL && v->di_tv.v_type == VAR_FUNC)
      {
  	if (v->di_tv.vval.v_string == NULL)
  	{
  	    *lenp = 0;
  	    return (char_u *)"";	/* just in case */
  	}
  	*lenp = (int)STRLEN(v->di_tv.vval.v_string);
  	return v->di_tv.vval.v_string;
      }
  
      return name;
  }
  
  /*
   * Allocate a variable for the result of a function.
   * Return OK or FAIL.
   */
      static int
  get_func_tv(name, len, rettv, arg, firstline, lastline, doesrange,
  							   evaluate, selfdict)
      char_u	*name;		/* name of the function */
      int		len;		/* length of "name" */
      typval_T	*rettv;
      char_u	**arg;		/* argument, pointing to the '(' */
      linenr_T	firstline;	/* first line of range */
      linenr_T	lastline;	/* last line of range */
      int		*doesrange;	/* return: function handled range */
      int		evaluate;
      dict_T	*selfdict;	/* Dictionary for "self" */
  {
      char_u	*argp;
      int		ret = OK;
      typval_T	argvars[MAX_FUNC_ARGS + 1];	/* vars for arguments */
      int		argcount = 0;		/* number of arguments found */
  
      /*
       * Get the arguments.
       */
      argp = *arg;
      while (argcount < MAX_FUNC_ARGS)
      {
  	argp = skipwhite(argp + 1);	    /* skip the '(' or ',' */
  	if (*argp == ')' || *argp == ',' || *argp == NUL)
  	    break;
  	if (eval1(&argp, &argvars[argcount], evaluate) == FAIL)
  	{
  	    ret = FAIL;
  	    break;
  	}
  	++argcount;
  	if (*argp != ',')
  	    break;
      }
      if (*argp == ')')
  	++argp;
      else
  	ret = FAIL;
  
      if (ret == OK)
  	ret = call_func(name, len, rettv, argcount, argvars,
  			  firstline, lastline, doesrange, evaluate, selfdict);
      else if (!aborting())
      {
  	if (argcount == MAX_FUNC_ARGS)
  	    emsg_funcname(N_("E740: Too many arguments for function %s"), name);
  	else
  	    emsg_funcname(N_("E116: Invalid arguments for function %s"), name);
      }
  
      while (--argcount >= 0)
  	clear_tv(&argvars[argcount]);
  
      *arg = skipwhite(argp);
      return ret;
  }
  
  
  /*
   * Call a function with its resolved parameters
   * Return FAIL when the function can't be called,  OK otherwise.
   * Also returns OK when an error was encountered while executing the function.
   */
      static int
  call_func(funcname, len, rettv, argcount, argvars, firstline, lastline,
  						doesrange, evaluate, selfdict)
      char_u	*funcname;	/* name of the function */
      int		len;		/* length of "name" */
      typval_T	*rettv;		/* return value goes here */
      int		argcount;	/* number of "argvars" */
      typval_T	*argvars;	/* vars for arguments, must have "argcount"
  				   PLUS ONE elements! */
      linenr_T	firstline;	/* first line of range */
      linenr_T	lastline;	/* last line of range */
      int		*doesrange;	/* return: function handled range */
      int		evaluate;
      dict_T	*selfdict;	/* Dictionary for "self" */
  {
      int		ret = FAIL;
  #define ERROR_UNKNOWN	0
  #define ERROR_TOOMANY	1
  #define ERROR_TOOFEW	2
  #define ERROR_SCRIPT	3
  #define ERROR_DICT	4
  #define ERROR_NONE	5
  #define ERROR_OTHER	6
      int		error = ERROR_NONE;
      int		i;
      int		llen;
      ufunc_T	*fp;
  #define FLEN_FIXED 40
      char_u	fname_buf[FLEN_FIXED + 1];
      char_u	*fname;
      char_u	*name;
  
      /* Make a copy of the name, if it comes from a funcref variable it could
       * be changed or deleted in the called function. */
      name = vim_strnsave(funcname, len);
      if (name == NULL)
  	return ret;
  
      /*
       * In a script change <SID>name() and s:name() to K_SNR 123_name().
       * Change <SNR>123_name() to K_SNR 123_name().
       * Use fname_buf[] when it fits, otherwise allocate memory (slow).
       */
      llen = eval_fname_script(name);
      if (llen > 0)
      {
  	fname_buf[0] = K_SPECIAL;
  	fname_buf[1] = KS_EXTRA;
  	fname_buf[2] = (int)KE_SNR;
  	i = 3;
  	if (eval_fname_sid(name))	/* "<SID>" or "s:" */
  	{
  	    if (current_SID <= 0)
  		error = ERROR_SCRIPT;
  	    else
  	    {
  		sprintf((char *)fname_buf + 3, "%ld_", (long)current_SID);
  		i = (int)STRLEN(fname_buf);
  	    }
  	}
  	if (i + STRLEN(name + llen) < FLEN_FIXED)
  	{
  	    STRCPY(fname_buf + i, name + llen);
  	    fname = fname_buf;
  	}
  	else
  	{
  	    fname = alloc((unsigned)(i + STRLEN(name + llen) + 1));
  	    if (fname == NULL)
  		error = ERROR_OTHER;
  	    else
  	    {
  		mch_memmove(fname, fname_buf, (size_t)i);
  		STRCPY(fname + i, name + llen);
  	    }
  	}
      }
      else
  	fname = name;
  
      *doesrange = FALSE;
  
  
      /* execute the function if no errors detected and executing */
      if (evaluate && error == ERROR_NONE)
      {
  	char_u *rfname = fname;
  
  	/* Ignore "g:" before a function name. */
  	if (fname[0] == 'g' && fname[1] == ':')
  	    rfname = fname + 2;
  
  	rettv->v_type = VAR_NUMBER;	/* default rettv is number zero */
  	rettv->vval.v_number = 0;
  	error = ERROR_UNKNOWN;
  
  	if (!builtin_function(rfname, -1))
  	{
  	    /*
  	     * User defined function.
  	     */
  	    fp = find_func(rfname);
  
  #ifdef FEAT_AUTOCMD
  	    /* Trigger FuncUndefined event, may load the function. */
  	    if (fp == NULL
  		    && apply_autocmds(EVENT_FUNCUNDEFINED,
  						     rfname, rfname, TRUE, NULL)
  		    && !aborting())
  	    {
  		/* executed an autocommand, search for the function again */
  		fp = find_func(rfname);
  	    }
  #endif
  	    /* Try loading a package. */
  	    if (fp == NULL && script_autoload(rfname, TRUE) && !aborting())
  	    {
  		/* loaded a package, search for the function again */
  		fp = find_func(rfname);
  	    }
  
  	    if (fp != NULL)
  	    {
  		if (fp->uf_flags & FC_RANGE)
  		    *doesrange = TRUE;
  		if (argcount < fp->uf_args.ga_len)
  		    error = ERROR_TOOFEW;
  		else if (!fp->uf_varargs && argcount > fp->uf_args.ga_len)
  		    error = ERROR_TOOMANY;
  		else if ((fp->uf_flags & FC_DICT) && selfdict == NULL)
  		    error = ERROR_DICT;
  		else
  		{
  		    int did_save_redo = FALSE;
  
  		    /*
  		     * Call the user function.
  		     * Save and restore search patterns, script variables and
  		     * redo buffer.
  		     */
  		    save_search_patterns();
  		    if (!ins_compl_active())
  		    {
  			saveRedobuff();
  			did_save_redo = TRUE;
  		    }
  		    ++fp->uf_calls;
  		    call_user_func(fp, argcount, argvars, rettv,
  					       firstline, lastline,
  				  (fp->uf_flags & FC_DICT) ? selfdict : NULL);
  		    if (--fp->uf_calls <= 0 && isdigit(*fp->uf_name)
  						      && fp->uf_refcount <= 0)
  			/* Function was unreferenced while being used, free it
  			 * now. */
  			func_free(fp);
  		    if (did_save_redo)
  			restoreRedobuff();
  		    restore_search_patterns();
  		    error = ERROR_NONE;
  		}
  	    }
  	}
  	else
  	{
  	    /*
  	     * Find the function name in the table, call its implementation.
  	     */
  	    i = find_internal_func(fname);
  	    if (i >= 0)
  	    {
  		if (argcount < functions[i].f_min_argc)
  		    error = ERROR_TOOFEW;
  		else if (argcount > functions[i].f_max_argc)
  		    error = ERROR_TOOMANY;
  		else
  		{
  		    argvars[argcount].v_type = VAR_UNKNOWN;
  		    functions[i].f_func(argvars, rettv);
  		    error = ERROR_NONE;
  		}
  	    }
  	}
  	/*
  	 * The function call (or "FuncUndefined" autocommand sequence) might
  	 * have been aborted by an error, an interrupt, or an explicitly thrown
  	 * exception that has not been caught so far.  This situation can be
  	 * tested for by calling aborting().  For an error in an internal
  	 * function or for the "E132" error in call_user_func(), however, the
  	 * throw point at which the "force_abort" flag (temporarily reset by
  	 * emsg()) is normally updated has not been reached yet. We need to
  	 * update that flag first to make aborting() reliable.
  	 */
  	update_force_abort();
      }
      if (error == ERROR_NONE)
  	ret = OK;
  
      /*
       * Report an error unless the argument evaluation or function call has been
       * cancelled due to an aborting error, an interrupt, or an exception.
       */
      if (!aborting())
      {
  	switch (error)
  	{
  	    case ERROR_UNKNOWN:
  		    emsg_funcname(N_("E117: Unknown function: %s"), name);
  		    break;
  	    case ERROR_TOOMANY:
  		    emsg_funcname(e_toomanyarg, name);
  		    break;
  	    case ERROR_TOOFEW:
  		    emsg_funcname(N_("E119: Not enough arguments for function: %s"),
  									name);
  		    break;
  	    case ERROR_SCRIPT:
  		    emsg_funcname(N_("E120: Using <SID> not in a script context: %s"),
  									name);
  		    break;
  	    case ERROR_DICT:
  		    emsg_funcname(N_("E725: Calling dict function without Dictionary: %s"),
  									name);
  		    break;
  	}
      }
  
      if (fname != name && fname != fname_buf)
  	vim_free(fname);
      vim_free(name);
  
      return ret;
  }
  
  /*
   * Give an error message with a function name.  Handle <SNR> things.
   * "ermsg" is to be passed without translation, use N_() instead of _().
   */
      static void
  emsg_funcname(ermsg, name)
      char	*ermsg;
      char_u	*name;
  {
      char_u	*p;
  
      if (*name == K_SPECIAL)
  	p = concat_str((char_u *)"<SNR>", name + 3);
      else
  	p = name;
      EMSG2(_(ermsg), p);
      if (p != name)
  	vim_free(p);
  }
  
  /*
   * Return TRUE for a non-zero Number and a non-empty String.
   */
      static int
  non_zero_arg(argvars)
      typval_T	*argvars;
  {
      return ((argvars[0].v_type == VAR_NUMBER
  		&& argvars[0].vval.v_number != 0)
  	    || (argvars[0].v_type == VAR_STRING
  		&& argvars[0].vval.v_string != NULL
  		&& *argvars[0].vval.v_string != NUL));
  }
  
  /*********************************************
   * Implementation of the built-in functions
   */
  
  #ifdef FEAT_FLOAT
  static int get_float_arg __ARGS((typval_T *argvars, float_T *f));
  
  /*
   * Get the float value of "argvars[0]" into "f".
   * Returns FAIL when the argument is not a Number or Float.
   */
      static int
  get_float_arg(argvars, f)
      typval_T	*argvars;
      float_T	*f;
  {
      if (argvars[0].v_type == VAR_FLOAT)
      {
  	*f = argvars[0].vval.v_float;
  	return OK;
      }
      if (argvars[0].v_type == VAR_NUMBER)
      {
  	*f = (float_T)argvars[0].vval.v_number;
  	return OK;
      }
      EMSG(_("E808: Number or Float required"));
      return FAIL;
  }
  
  /*
   * "abs(expr)" function
   */
      static void
  f_abs(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      if (argvars[0].v_type == VAR_FLOAT)
      {
  	rettv->v_type = VAR_FLOAT;
  	rettv->vval.v_float = fabs(argvars[0].vval.v_float);
      }
      else
      {
  	varnumber_T	n;
  	int		error = FALSE;
  
  	n = get_tv_number_chk(&argvars[0], &error);
  	if (error)
  	    rettv->vval.v_number = -1;
  	else if (n > 0)
  	    rettv->vval.v_number = n;
  	else
  	    rettv->vval.v_number = -n;
      }
  }
  
  /*
   * "acos()" function
   */
      static void
  f_acos(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = acos(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  /*
   * "add(list, item)" function
   */
      static void
  f_add(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      list_T	*l;
  
      rettv->vval.v_number = 1; /* Default: Failed */
      if (argvars[0].v_type == VAR_LIST)
      {
  	if ((l = argvars[0].vval.v_list) != NULL
  		&& !tv_check_lock(l->lv_lock,
  					 (char_u *)N_("add() argument"), TRUE)
  		&& list_append_tv(l, &argvars[1]) == OK)
  	    copy_tv(&argvars[0], rettv);
      }
      else
  	EMSG(_(e_listreq));
  }
  
  /*
   * "and(expr, expr)" function
   */
      static void
  f_and(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = get_tv_number_chk(&argvars[0], NULL)
  					& get_tv_number_chk(&argvars[1], NULL);
  }
  
  /*
   * "append(lnum, string/list)" function
   */
      static void
  f_append(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      long	lnum;
      char_u	*line;
      list_T	*l = NULL;
      listitem_T	*li = NULL;
      typval_T	*tv;
      long	added = 0;
  
      /* When coming here from Insert mode, sync undo, so that this can be
       * undone separately from what was previously inserted. */
      if (u_sync_once == 2)
      {
  	u_sync_once = 1; /* notify that u_sync() was called */
  	u_sync(TRUE);
      }
  
      lnum = get_tv_lnum(argvars);
      if (lnum >= 0
  	    && lnum <= curbuf->b_ml.ml_line_count
  	    && u_save(lnum, lnum + 1) == OK)
      {
  	if (argvars[1].v_type == VAR_LIST)
  	{
  	    l = argvars[1].vval.v_list;
  	    if (l == NULL)
  		return;
  	    li = l->lv_first;
  	}
  	for (;;)
  	{
  	    if (l == NULL)
  		tv = &argvars[1];	/* append a string */
  	    else if (li == NULL)
  		break;			/* end of list */
  	    else
  		tv = &li->li_tv;	/* append item from list */
  	    line = get_tv_string_chk(tv);
  	    if (line == NULL)		/* type error */
  	    {
  		rettv->vval.v_number = 1;	/* Failed */
  		break;
  	    }
  	    ml_append(lnum + added, line, (colnr_T)0, FALSE);
  	    ++added;
  	    if (l == NULL)
  		break;
  	    li = li->li_next;
  	}
  
  	appended_lines_mark(lnum, added);
  	if (curwin->w_cursor.lnum > lnum)
  	    curwin->w_cursor.lnum += added;
      }
      else
  	rettv->vval.v_number = 1;	/* Failed */
  }
  
  /*
   * "argc()" function
   */
      static void
  f_argc(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = ARGCOUNT;
  }
  
  /*
   * "argidx()" function
   */
      static void
  f_argidx(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = curwin->w_arg_idx;
  }
  
  /*
   * "arglistid()" function
   */
      static void
  f_arglistid(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      win_T	*wp;
      tabpage_T	*tp = NULL;
      long	n;
  
      rettv->vval.v_number = -1;
      if (argvars[0].v_type != VAR_UNKNOWN)
      {
  	if (argvars[1].v_type != VAR_UNKNOWN)
  	{
  	    n = get_tv_number(&argvars[1]);
  	    if (n >= 0)
  		tp = find_tabpage(n);
  	}
  	else
  	    tp = curtab;
  
  	if (tp != NULL)
  	{
  	    wp = find_win_by_nr(&argvars[0], tp);
  	    if (wp != NULL)
  		rettv->vval.v_number = wp->w_alist->id;
  	}
      }
      else
  	rettv->vval.v_number = curwin->w_alist->id;
  }
  
  /*
   * "argv(nr)" function
   */
      static void
  f_argv(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		idx;
  
      if (argvars[0].v_type != VAR_UNKNOWN)
      {
  	idx = get_tv_number_chk(&argvars[0], NULL);
  	if (idx >= 0 && idx < ARGCOUNT)
  	    rettv->vval.v_string = vim_strsave(alist_name(&ARGLIST[idx]));
  	else
  	    rettv->vval.v_string = NULL;
  	rettv->v_type = VAR_STRING;
      }
      else if (rettv_list_alloc(rettv) == OK)
  	for (idx = 0; idx < ARGCOUNT; ++idx)
  	    list_append_string(rettv->vval.v_list,
  					       alist_name(&ARGLIST[idx]), -1);
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "asin()" function
   */
      static void
  f_asin(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = asin(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  
  /*
   * "atan()" function
   */
      static void
  f_atan(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = atan(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  
  /*
   * "atan2()" function
   */
      static void
  f_atan2(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	fx, fy;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &fx) == OK
  				     && get_float_arg(&argvars[1], &fy) == OK)
  	rettv->vval.v_float = atan2(fx, fy);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  /*
   * "browse(save, title, initdir, default)" function
   */
      static void
  f_browse(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_BROWSE
      int		save;
      char_u	*title;
      char_u	*initdir;
      char_u	*defname;
      char_u	buf[NUMBUFLEN];
      char_u	buf2[NUMBUFLEN];
      int		error = FALSE;
  
      save = get_tv_number_chk(&argvars[0], &error);
      title = get_tv_string_chk(&argvars[1]);
      initdir = get_tv_string_buf_chk(&argvars[2], buf);
      defname = get_tv_string_buf_chk(&argvars[3], buf2);
  
      if (error || title == NULL || initdir == NULL || defname == NULL)
  	rettv->vval.v_string = NULL;
      else
  	rettv->vval.v_string =
  		 do_browse(save ? BROWSE_SAVE : 0,
  				 title, defname, NULL, initdir, NULL, curbuf);
  #else
      rettv->vval.v_string = NULL;
  #endif
      rettv->v_type = VAR_STRING;
  }
  
  /*
   * "browsedir(title, initdir)" function
   */
      static void
  f_browsedir(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_BROWSE
      char_u	*title;
      char_u	*initdir;
      char_u	buf[NUMBUFLEN];
  
      title = get_tv_string_chk(&argvars[0]);
      initdir = get_tv_string_buf_chk(&argvars[1], buf);
  
      if (title == NULL || initdir == NULL)
  	rettv->vval.v_string = NULL;
      else
  	rettv->vval.v_string = do_browse(BROWSE_DIR,
  				    title, NULL, NULL, initdir, NULL, curbuf);
  #else
      rettv->vval.v_string = NULL;
  #endif
      rettv->v_type = VAR_STRING;
  }
  
  static buf_T *find_buffer __ARGS((typval_T *avar));
  
  /*
   * Find a buffer by number or exact name.
   */
      static buf_T *
  find_buffer(avar)
      typval_T	*avar;
  {
      buf_T	*buf = NULL;
  
      if (avar->v_type == VAR_NUMBER)
  	buf = buflist_findnr((int)avar->vval.v_number);
      else if (avar->v_type == VAR_STRING && avar->vval.v_string != NULL)
      {
  	buf = buflist_findname_exp(avar->vval.v_string);
  	if (buf == NULL)
  	{
  	    /* No full path name match, try a match with a URL or a "nofile"
  	     * buffer, these don't use the full path. */
  	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  		if (buf->b_fname != NULL
  			&& (path_with_url(buf->b_fname)
  #ifdef FEAT_QUICKFIX
  			    || bt_nofile(buf)
  #endif
  			   )
  			&& STRCMP(buf->b_fname, avar->vval.v_string) == 0)
  		    break;
  	}
      }
      return buf;
  }
  
  /*
   * "bufexists(expr)" function
   */
      static void
  f_bufexists(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = (find_buffer(&argvars[0]) != NULL);
  }
  
  /*
   * "buflisted(expr)" function
   */
      static void
  f_buflisted(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      buf_T	*buf;
  
      buf = find_buffer(&argvars[0]);
      rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
  }
  
  /*
   * "bufloaded(expr)" function
   */
      static void
  f_bufloaded(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      buf_T	*buf;
  
      buf = find_buffer(&argvars[0]);
      rettv->vval.v_number = (buf != NULL && buf->b_ml.ml_mfp != NULL);
  }
  
  static buf_T *get_buf_tv __ARGS((typval_T *tv, int curtab_only));
  
  /*
   * Get buffer by number or pattern.
   */
      static buf_T *
  get_buf_tv(tv, curtab_only)
      typval_T	*tv;
      int		curtab_only;
  {
      char_u	*name = tv->vval.v_string;
      int		save_magic;
      char_u	*save_cpo;
      buf_T	*buf;
  
      if (tv->v_type == VAR_NUMBER)
  	return buflist_findnr((int)tv->vval.v_number);
      if (tv->v_type != VAR_STRING)
  	return NULL;
      if (name == NULL || *name == NUL)
  	return curbuf;
      if (name[0] == '$' && name[1] == NUL)
  	return lastbuf;
  
      /* Ignore 'magic' and 'cpoptions' here to make scripts portable */
      save_magic = p_magic;
      p_magic = TRUE;
      save_cpo = p_cpo;
      p_cpo = (char_u *)"";
  
      buf = buflist_findnr(buflist_findpat(name, name + STRLEN(name),
  						    TRUE, FALSE, curtab_only));
  
      p_magic = save_magic;
      p_cpo = save_cpo;
  
      /* If not found, try expanding the name, like done for bufexists(). */
      if (buf == NULL)
  	buf = find_buffer(tv);
  
      return buf;
  }
  
  /*
   * "bufname(expr)" function
   */
      static void
  f_bufname(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      buf_T	*buf;
  
      (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
      ++emsg_off;
      buf = get_buf_tv(&argvars[0], FALSE);
      rettv->v_type = VAR_STRING;
      if (buf != NULL && buf->b_fname != NULL)
  	rettv->vval.v_string = vim_strsave(buf->b_fname);
      else
  	rettv->vval.v_string = NULL;
      --emsg_off;
  }
  
  /*
   * "bufnr(expr)" function
   */
      static void
  f_bufnr(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      buf_T	*buf;
      int		error = FALSE;
      char_u	*name;
  
      (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
      ++emsg_off;
      buf = get_buf_tv(&argvars[0], FALSE);
      --emsg_off;
  
      /* If the buffer isn't found and the second argument is not zero create a
       * new buffer. */
      if (buf == NULL
  	    && argvars[1].v_type != VAR_UNKNOWN
  	    && get_tv_number_chk(&argvars[1], &error) != 0
  	    && !error
  	    && (name = get_tv_string_chk(&argvars[0])) != NULL
  	    && !error)
  	buf = buflist_new(name, NULL, (linenr_T)1, 0);
  
      if (buf != NULL)
  	rettv->vval.v_number = buf->b_fnum;
      else
  	rettv->vval.v_number = -1;
  }
  
  /*
   * "bufwinnr(nr)" function
   */
      static void
  f_bufwinnr(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
  #ifdef FEAT_WINDOWS
      win_T	*wp;
      int		winnr = 0;
  #endif
      buf_T	*buf;
  
      (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
      ++emsg_off;
      buf = get_buf_tv(&argvars[0], TRUE);
  #ifdef FEAT_WINDOWS
      for (wp = firstwin; wp; wp = wp->w_next)
      {
  	++winnr;
  	if (wp->w_buffer == buf)
  	    break;
      }
      rettv->vval.v_number = (wp != NULL ? winnr : -1);
  #else
      rettv->vval.v_number = (curwin->w_buffer == buf ? 1 : -1);
  #endif
      --emsg_off;
  }
  
  /*
   * "byte2line(byte)" function
   */
      static void
  f_byte2line(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifndef FEAT_BYTEOFF
      rettv->vval.v_number = -1;
  #else
      long	boff = 0;
  
      boff = get_tv_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
      if (boff < 0)
  	rettv->vval.v_number = -1;
      else
  	rettv->vval.v_number = ml_find_line_or_offset(curbuf,
  							  (linenr_T)0, &boff);
  #endif
  }
  
      static void
  byteidx(argvars, rettv, comp)
      typval_T	*argvars;
      typval_T	*rettv;
      int		comp UNUSED;
  {
  #ifdef FEAT_MBYTE
      char_u	*t;
  #endif
      char_u	*str;
      long	idx;
  
      str = get_tv_string_chk(&argvars[0]);
      idx = get_tv_number_chk(&argvars[1], NULL);
      rettv->vval.v_number = -1;
      if (str == NULL || idx < 0)
  	return;
  
  #ifdef FEAT_MBYTE
      t = str;
      for ( ; idx > 0; idx--)
      {
  	if (*t == NUL)		/* EOL reached */
  	    return;
  	if (enc_utf8 && comp)
  	    t += utf_ptr2len(t);
  	else
  	    t += (*mb_ptr2len)(t);
      }
      rettv->vval.v_number = (varnumber_T)(t - str);
  #else
      if ((size_t)idx <= STRLEN(str))
  	rettv->vval.v_number = idx;
  #endif
  }
  
  /*
   * "byteidx()" function
   */
      static void
  f_byteidx(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      byteidx(argvars, rettv, FALSE);
  }
  
  /*
   * "byteidxcomp()" function
   */
      static void
  f_byteidxcomp(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      byteidx(argvars, rettv, TRUE);
  }
  
      int
  func_call(name, args, selfdict, rettv)
      char_u	*name;
      typval_T	*args;
      dict_T	*selfdict;
      typval_T	*rettv;
  {
      listitem_T	*item;
      typval_T	argv[MAX_FUNC_ARGS + 1];
      int		argc = 0;
      int		dummy;
      int		r = 0;
  
      for (item = args->vval.v_list->lv_first; item != NULL;
  							 item = item->li_next)
      {
  	if (argc == MAX_FUNC_ARGS)
  	{
  	    EMSG(_("E699: Too many arguments"));
  	    break;
  	}
  	/* Make a copy of each argument.  This is needed to be able to set
  	 * v_lock to VAR_FIXED in the copy without changing the original list.
  	 */
  	copy_tv(&item->li_tv, &argv[argc++]);
      }
  
      if (item == NULL)
  	r = call_func(name, (int)STRLEN(name), rettv, argc, argv,
  				 curwin->w_cursor.lnum, curwin->w_cursor.lnum,
  						      &dummy, TRUE, selfdict);
  
      /* Free the arguments. */
      while (argc > 0)
  	clear_tv(&argv[--argc]);
  
      return r;
  }
  
  /*
   * "call(func, arglist)" function
   */
      static void
  f_call(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*func;
      dict_T	*selfdict = NULL;
  
      if (argvars[1].v_type != VAR_LIST)
      {
  	EMSG(_(e_listreq));
  	return;
      }
      if (argvars[1].vval.v_list == NULL)
  	return;
  
      if (argvars[0].v_type == VAR_FUNC)
  	func = argvars[0].vval.v_string;
      else
  	func = get_tv_string(&argvars[0]);
      if (*func == NUL)
  	return;		/* type error or empty name */
  
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	if (argvars[2].v_type != VAR_DICT)
  	{
  	    EMSG(_(e_dictreq));
  	    return;
  	}
  	selfdict = argvars[2].vval.v_dict;
      }
  
      (void)func_call(func, &argvars[1], selfdict, rettv);
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "ceil({float})" function
   */
      static void
  f_ceil(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = ceil(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  /*
   * "changenr()" function
   */
      static void
  f_changenr(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = curbuf->b_u_seq_cur;
  }
  
  /*
   * "char2nr(string)" function
   */
      static void
  f_char2nr(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
  #ifdef FEAT_MBYTE
      if (has_mbyte)
      {
  	int	utf8 = 0;
  
  	if (argvars[1].v_type != VAR_UNKNOWN)
  	    utf8 = get_tv_number_chk(&argvars[1], NULL);
  
  	if (utf8)
  	    rettv->vval.v_number = (*utf_ptr2char)(get_tv_string(&argvars[0]));
  	else
  	    rettv->vval.v_number = (*mb_ptr2char)(get_tv_string(&argvars[0]));
      }
      else
  #endif
      rettv->vval.v_number = get_tv_string(&argvars[0])[0];
  }
  
  /*
   * "cindent(lnum)" function
   */
      static void
  f_cindent(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_CINDENT
      pos_T	pos;
      linenr_T	lnum;
  
      pos = curwin->w_cursor;
      lnum = get_tv_lnum(argvars);
      if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
      {
  	curwin->w_cursor.lnum = lnum;
  	rettv->vval.v_number = get_c_indent();
  	curwin->w_cursor = pos;
      }
      else
  #endif
  	rettv->vval.v_number = -1;
  }
  
  /*
   * "clearmatches()" function
   */
      static void
  f_clearmatches(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_SEARCH_EXTRA
      clear_matches(curwin);
  #endif
  }
  
  /*
   * "col(string)" function
   */
      static void
  f_col(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      colnr_T	col = 0;
      pos_T	*fp;
      int		fnum = curbuf->b_fnum;
  
      fp = var2fpos(&argvars[0], FALSE, &fnum);
      if (fp != NULL && fnum == curbuf->b_fnum)
      {
  	if (fp->col == MAXCOL)
  	{
  	    /* '> can be MAXCOL, get the length of the line then */
  	    if (fp->lnum <= curbuf->b_ml.ml_line_count)
  		col = (colnr_T)STRLEN(ml_get(fp->lnum)) + 1;
  	    else
  		col = MAXCOL;
  	}
  	else
  	{
  	    col = fp->col + 1;
  #ifdef FEAT_VIRTUALEDIT
  	    /* col(".") when the cursor is on the NUL at the end of the line
  	     * because of "coladd" can be seen as an extra column. */
  	    if (virtual_active() && fp == &curwin->w_cursor)
  	    {
  		char_u	*p = ml_get_cursor();
  
  		if (curwin->w_cursor.coladd >= (colnr_T)chartabsize(p,
  				 curwin->w_virtcol - curwin->w_cursor.coladd))
  		{
  # ifdef FEAT_MBYTE
  		    int		l;
  
  		    if (*p != NUL && p[(l = (*mb_ptr2len)(p))] == NUL)
  			col += l;
  # else
  		    if (*p != NUL && p[1] == NUL)
  			++col;
  # endif
  		}
  	    }
  #endif
  	}
      }
      rettv->vval.v_number = col;
  }
  
  #if defined(FEAT_INS_EXPAND)
  /*
   * "complete()" function
   */
      static void
  f_complete(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv UNUSED;
  {
      int	    startcol;
  
      if ((State & INSERT) == 0)
      {
  	EMSG(_("E785: complete() can only be used in Insert mode"));
  	return;
      }
  
      /* Check for undo allowed here, because if something was already inserted
       * the line was already saved for undo and this check isn't done. */
      if (!undo_allowed())
  	return;
  
      if (argvars[1].v_type != VAR_LIST || argvars[1].vval.v_list == NULL)
      {
  	EMSG(_(e_invarg));
  	return;
      }
  
      startcol = get_tv_number_chk(&argvars[0], NULL);
      if (startcol <= 0)
  	return;
  
      set_completion(startcol - 1, argvars[1].vval.v_list);
  }
  
  /*
   * "complete_add()" function
   */
      static void
  f_complete_add(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = ins_compl_add_tv(&argvars[0], 0);
  }
  
  /*
   * "complete_check()" function
   */
      static void
  f_complete_check(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      int		saved = RedrawingDisabled;
  
      RedrawingDisabled = 0;
      ins_compl_check_keys(0);
      rettv->vval.v_number = compl_interrupted;
      RedrawingDisabled = saved;
  }
  #endif
  
  /*
   * "confirm(message, buttons[, default [, type]])" function
   */
      static void
  f_confirm(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
      char_u	*message;
      char_u	*buttons = NULL;
      char_u	buf[NUMBUFLEN];
      char_u	buf2[NUMBUFLEN];
      int		def = 1;
      int		type = VIM_GENERIC;
      char_u	*typestr;
      int		error = FALSE;
  
      message = get_tv_string_chk(&argvars[0]);
      if (message == NULL)
  	error = TRUE;
      if (argvars[1].v_type != VAR_UNKNOWN)
      {
  	buttons = get_tv_string_buf_chk(&argvars[1], buf);
  	if (buttons == NULL)
  	    error = TRUE;
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	{
  	    def = get_tv_number_chk(&argvars[2], &error);
  	    if (argvars[3].v_type != VAR_UNKNOWN)
  	    {
  		typestr = get_tv_string_buf_chk(&argvars[3], buf2);
  		if (typestr == NULL)
  		    error = TRUE;
  		else
  		{
  		    switch (TOUPPER_ASC(*typestr))
  		    {
  			case 'E': type = VIM_ERROR; break;
  			case 'Q': type = VIM_QUESTION; break;
  			case 'I': type = VIM_INFO; break;
  			case 'W': type = VIM_WARNING; break;
  			case 'G': type = VIM_GENERIC; break;
  		    }
  		}
  	    }
  	}
      }
  
      if (buttons == NULL || *buttons == NUL)
  	buttons = (char_u *)_("&Ok");
  
      if (!error)
  	rettv->vval.v_number = do_dialog(type, NULL, message, buttons,
  							    def, NULL, FALSE);
  #endif
  }
  
  /*
   * "copy()" function
   */
      static void
  f_copy(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      item_copy(&argvars[0], rettv, FALSE, 0);
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "cos()" function
   */
      static void
  f_cos(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = cos(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  
  /*
   * "cosh()" function
   */
      static void
  f_cosh(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = cosh(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  /*
   * "count()" function
   */
      static void
  f_count(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      long	n = 0;
      int		ic = FALSE;
  
      if (argvars[0].v_type == VAR_LIST)
      {
  	listitem_T	*li;
  	list_T		*l;
  	long		idx;
  
  	if ((l = argvars[0].vval.v_list) != NULL)
  	{
  	    li = l->lv_first;
  	    if (argvars[2].v_type != VAR_UNKNOWN)
  	    {
  		int error = FALSE;
  
  		ic = get_tv_number_chk(&argvars[2], &error);
  		if (argvars[3].v_type != VAR_UNKNOWN)
  		{
  		    idx = get_tv_number_chk(&argvars[3], &error);
  		    if (!error)
  		    {
  			li = list_find(l, idx);
  			if (li == NULL)
  			    EMSGN(_(e_listidx), idx);
  		    }
  		}
  		if (error)
  		    li = NULL;
  	    }
  
  	    for ( ; li != NULL; li = li->li_next)
  		if (tv_equal(&li->li_tv, &argvars[1], ic, FALSE))
  		    ++n;
  	}
      }
      else if (argvars[0].v_type == VAR_DICT)
      {
  	int		todo;
  	dict_T		*d;
  	hashitem_T	*hi;
  
  	if ((d = argvars[0].vval.v_dict) != NULL)
  	{
  	    int error = FALSE;
  
  	    if (argvars[2].v_type != VAR_UNKNOWN)
  	    {
  		ic = get_tv_number_chk(&argvars[2], &error);
  		if (argvars[3].v_type != VAR_UNKNOWN)
  		    EMSG(_(e_invarg));
  	    }
  
  	    todo = error ? 0 : (int)d->dv_hashtab.ht_used;
  	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
  	    {
  		if (!HASHITEM_EMPTY(hi))
  		{
  		    --todo;
  		    if (tv_equal(&HI2DI(hi)->di_tv, &argvars[1], ic, FALSE))
  			++n;
  		}
  	    }
  	}
      }
      else
  	EMSG2(_(e_listdictarg), "count()");
      rettv->vval.v_number = n;
  }
  
  /*
   * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
   *
   * Checks the existence of a cscope connection.
   */
      static void
  f_cscope_connection(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_CSCOPE
      int		num = 0;
      char_u	*dbpath = NULL;
      char_u	*prepend = NULL;
      char_u	buf[NUMBUFLEN];
  
      if (argvars[0].v_type != VAR_UNKNOWN
  	    && argvars[1].v_type != VAR_UNKNOWN)
      {
  	num = (int)get_tv_number(&argvars[0]);
  	dbpath = get_tv_string(&argvars[1]);
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	    prepend = get_tv_string_buf(&argvars[2], buf);
      }
  
      rettv->vval.v_number = cs_connection(num, dbpath, prepend);
  #endif
  }
  
  /*
   * "cursor(lnum, col)" function
   *
   * Moves the cursor to the specified line and column.
   * Returns 0 when the position could be set, -1 otherwise.
   */
      static void
  f_cursor(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      long	line, col;
  #ifdef FEAT_VIRTUALEDIT
      long	coladd = 0;
  #endif
  
      rettv->vval.v_number = -1;
      if (argvars[1].v_type == VAR_UNKNOWN)
      {
  	pos_T	    pos;
  	colnr_T	    curswant = -1;
  
  	if (list2fpos(argvars, &pos, NULL, &curswant) == FAIL)
  	    return;
  	line = pos.lnum;
  	col = pos.col;
  #ifdef FEAT_VIRTUALEDIT
  	coladd = pos.coladd;
  #endif
  	if (curswant >= 0)
  	    curwin->w_curswant = curswant - 1;
      }
      else
      {
  	line = get_tv_lnum(argvars);
  	col = get_tv_number_chk(&argvars[1], NULL);
  #ifdef FEAT_VIRTUALEDIT
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	    coladd = get_tv_number_chk(&argvars[2], NULL);
  #endif
      }
      if (line < 0 || col < 0
  #ifdef FEAT_VIRTUALEDIT
  			    || coladd < 0
  #endif
  	    )
  	return;		/* type error; errmsg already given */
      if (line > 0)
  	curwin->w_cursor.lnum = line;
      if (col > 0)
  	curwin->w_cursor.col = col - 1;
  #ifdef FEAT_VIRTUALEDIT
      curwin->w_cursor.coladd = coladd;
  #endif
  
      /* Make sure the cursor is in a valid position. */
      check_cursor();
  #ifdef FEAT_MBYTE
      /* Correct cursor for multi-byte character. */
      if (has_mbyte)
  	mb_adjust_cursor();
  #endif
  
      curwin->w_set_curswant = TRUE;
      rettv->vval.v_number = 0;
  }
  
  /*
   * "deepcopy()" function
   */
      static void
  f_deepcopy(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		noref = 0;
  
      if (argvars[1].v_type != VAR_UNKNOWN)
  	noref = get_tv_number_chk(&argvars[1], NULL);
      if (noref < 0 || noref > 1)
  	EMSG(_(e_invarg));
      else
      {
  	current_copyID += COPYID_INC;
  	item_copy(&argvars[0], rettv, TRUE, noref == 0 ? current_copyID : 0);
      }
  }
  
  /*
   * "delete()" function
   */
      static void
  f_delete(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      if (check_restricted() || check_secure())
  	rettv->vval.v_number = -1;
      else
  	rettv->vval.v_number = mch_remove(get_tv_string(&argvars[0]));
  }
  
  /*
   * "did_filetype()" function
   */
      static void
  f_did_filetype(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_AUTOCMD
      rettv->vval.v_number = did_filetype;
  #endif
  }
  
  /*
   * "diff_filler()" function
   */
      static void
  f_diff_filler(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_DIFF
      rettv->vval.v_number = diff_check_fill(curwin, get_tv_lnum(argvars));
  #endif
  }
  
  /*
   * "diff_hlID()" function
   */
      static void
  f_diff_hlID(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_DIFF
      linenr_T		lnum = get_tv_lnum(argvars);
      static linenr_T	prev_lnum = 0;
      static int		changedtick = 0;
      static int		fnum = 0;
      static int		change_start = 0;
      static int		change_end = 0;
      static hlf_T	hlID = (hlf_T)0;
      int			filler_lines;
      int			col;
  
      if (lnum < 0)	/* ignore type error in {lnum} arg */
  	lnum = 0;
      if (lnum != prev_lnum
  	    || changedtick != curbuf->b_changedtick
  	    || fnum != curbuf->b_fnum)
      {
  	/* New line, buffer, change: need to get the values. */
  	filler_lines = diff_check(curwin, lnum);
  	if (filler_lines < 0)
  	{
  	    if (filler_lines == -1)
  	    {
  		change_start = MAXCOL;
  		change_end = -1;
  		if (diff_find_change(curwin, lnum, &change_start, &change_end))
  		    hlID = HLF_ADD;	/* added line */
  		else
  		    hlID = HLF_CHD;	/* changed line */
  	    }
  	    else
  		hlID = HLF_ADD;	/* added line */
  	}
  	else
  	    hlID = (hlf_T)0;
  	prev_lnum = lnum;
  	changedtick = curbuf->b_changedtick;
  	fnum = curbuf->b_fnum;
      }
  
      if (hlID == HLF_CHD || hlID == HLF_TXD)
      {
  	col = get_tv_number(&argvars[1]) - 1; /* ignore type error in {col} */
  	if (col >= change_start && col <= change_end)
  	    hlID = HLF_TXD;			/* changed text */
  	else
  	    hlID = HLF_CHD;			/* changed line */
      }
      rettv->vval.v_number = hlID == (hlf_T)0 ? 0 : (int)hlID;
  #endif
  }
  
  /*
   * "empty({expr})" function
   */
      static void
  f_empty(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		n;
  
      switch (argvars[0].v_type)
      {
  	case VAR_STRING:
  	case VAR_FUNC:
  	    n = argvars[0].vval.v_string == NULL
  					  || *argvars[0].vval.v_string == NUL;
  	    break;
  	case VAR_NUMBER:
  	    n = argvars[0].vval.v_number == 0;
  	    break;
  #ifdef FEAT_FLOAT
  	case VAR_FLOAT:
  	    n = argvars[0].vval.v_float == 0.0;
  	    break;
  #endif
  	case VAR_LIST:
  	    n = argvars[0].vval.v_list == NULL
  				  || argvars[0].vval.v_list->lv_first == NULL;
  	    break;
  	case VAR_DICT:
  	    n = argvars[0].vval.v_dict == NULL
  			|| argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
  	    break;
  	default:
  	    EMSG2(_(e_intern2), "f_empty()");
  	    n = 0;
      }
  
      rettv->vval.v_number = n;
  }
  
  /*
   * "escape({string}, {chars})" function
   */
      static void
  f_escape(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	buf[NUMBUFLEN];
  
      rettv->vval.v_string = vim_strsave_escaped(get_tv_string(&argvars[0]),
  					 get_tv_string_buf(&argvars[1], buf));
      rettv->v_type = VAR_STRING;
  }
  
  /*
   * "eval()" function
   */
      static void
  f_eval(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*s, *p;
  
      s = get_tv_string_chk(&argvars[0]);
      if (s != NULL)
  	s = skipwhite(s);
  
      p = s;
      if (s == NULL || eval1(&s, rettv, TRUE) == FAIL)
      {
  	if (p != NULL && !aborting())
  	    EMSG2(_(e_invexpr2), p);
  	need_clr_eos = FALSE;
  	rettv->v_type = VAR_NUMBER;
  	rettv->vval.v_number = 0;
      }
      else if (*s != NUL)
  	EMSG(_(e_trailing));
  }
  
  /*
   * "eventhandler()" function
   */
      static void
  f_eventhandler(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = vgetc_busy;
  }
  
  /*
   * "executable()" function
   */
      static void
  f_executable(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u *name = get_tv_string(&argvars[0]);
  
      /* Check in $PATH and also check directly if there is a directory name. */
      rettv->vval.v_number = mch_can_exe(name, NULL, TRUE)
  		 || (gettail(name) != name && mch_can_exe(name, NULL, FALSE));
  }
  
  /*
   * "exepath()" function
   */
      static void
  f_exepath(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u *p = NULL;
  
      (void)mch_can_exe(get_tv_string(&argvars[0]), &p, TRUE);
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = p;
  }
  
  /*
   * "exists()" function
   */
      static void
  f_exists(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*p;
      char_u	*name;
      int		n = FALSE;
      int		len = 0;
  
      p = get_tv_string(&argvars[0]);
      if (*p == '$')			/* environment variable */
      {
  	/* first try "normal" environment variables (fast) */
  	if (mch_getenv(p + 1) != NULL)
  	    n = TRUE;
  	else
  	{
  	    /* try expanding things like $VIM and ${HOME} */
  	    p = expand_env_save(p);
  	    if (p != NULL && *p != '$')
  		n = TRUE;
  	    vim_free(p);
  	}
      }
      else if (*p == '&' || *p == '+')			/* option */
      {
  	n = (get_option_tv(&p, NULL, TRUE) == OK);
  	if (*skipwhite(p) != NUL)
  	    n = FALSE;			/* trailing garbage */
      }
      else if (*p == '*')			/* internal or user defined function */
      {
  	n = function_exists(p + 1);
      }
      else if (*p == ':')
      {
  	n = cmd_exists(p + 1);
      }
      else if (*p == '#')
      {
  #ifdef FEAT_AUTOCMD
  	if (p[1] == '#')
  	    n = autocmd_supported(p + 2);
  	else
  	    n = au_exists(p + 1);
  #endif
      }
      else				/* internal variable */
      {
  	char_u	    *tofree;
  	typval_T    tv;
  
  	/* get_name_len() takes care of expanding curly braces */
  	name = p;
  	len = get_name_len(&p, &tofree, TRUE, FALSE);
  	if (len > 0)
  	{
  	    if (tofree != NULL)
  		name = tofree;
  	    n = (get_var_tv(name, len, &tv, NULL, FALSE, TRUE) == OK);
  	    if (n)
  	    {
  		/* handle d.key, l[idx], f(expr) */
  		n = (handle_subscript(&p, &tv, TRUE, FALSE) == OK);
  		if (n)
  		    clear_tv(&tv);
  	    }
  	}
  	if (*p != NUL)
  	    n = FALSE;
  
  	vim_free(tofree);
      }
  
      rettv->vval.v_number = n;
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "exp()" function
   */
      static void
  f_exp(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = exp(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  /*
   * "expand()" function
   */
      static void
  f_expand(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*s;
      int		len;
      char_u	*errormsg;
      int		options = WILD_SILENT|WILD_USE_NL|WILD_LIST_NOTFOUND;
      expand_T	xpc;
      int		error = FALSE;
      char_u	*result;
  
      rettv->v_type = VAR_STRING;
      if (argvars[1].v_type != VAR_UNKNOWN
  	    && argvars[2].v_type != VAR_UNKNOWN
  	    && get_tv_number_chk(&argvars[2], &error)
  	    && !error)
      {
  	rettv->v_type = VAR_LIST;
  	rettv->vval.v_list = NULL;
      }
  
      s = get_tv_string(&argvars[0]);
      if (*s == '%' || *s == '#' || *s == '<')
      {
  	++emsg_off;
  	result = eval_vars(s, s, &len, NULL, &errormsg, NULL);
  	--emsg_off;
  	if (rettv->v_type == VAR_LIST)
  	{
  	    if (rettv_list_alloc(rettv) != FAIL && result != NULL)
  		list_append_string(rettv->vval.v_list, result, -1);
  	    else
  		vim_free(result);
  	}
  	else
  	    rettv->vval.v_string = result;
      }
      else
      {
  	/* When the optional second argument is non-zero, don't remove matches
  	 * for 'wildignore' and don't put matches for 'suffixes' at the end. */
  	if (argvars[1].v_type != VAR_UNKNOWN
  				    && get_tv_number_chk(&argvars[1], &error))
  	    options |= WILD_KEEP_ALL;
  	if (!error)
  	{
  	    ExpandInit(&xpc);
  	    xpc.xp_context = EXPAND_FILES;
  	    if (p_wic)
  		options += WILD_ICASE;
  	    if (rettv->v_type == VAR_STRING)
  		rettv->vval.v_string = ExpandOne(&xpc, s, NULL,
  							   options, WILD_ALL);
  	    else if (rettv_list_alloc(rettv) != FAIL)
  	    {
  		int i;
  
  		ExpandOne(&xpc, s, NULL, options, WILD_ALL_KEEP);
  		for (i = 0; i < xpc.xp_numfiles; i++)
  		    list_append_string(rettv->vval.v_list, xpc.xp_files[i], -1);
  		ExpandCleanup(&xpc);
  	    }
  	}
  	else
  	    rettv->vval.v_string = NULL;
      }
  }
  
  /*
   * Go over all entries in "d2" and add them to "d1".
   * When "action" is "error" then a duplicate key is an error.
   * When "action" is "force" then a duplicate key is overwritten.
   * Otherwise duplicate keys are ignored ("action" is "keep").
   */
      void
  dict_extend(d1, d2, action)
      dict_T	*d1;
      dict_T	*d2;
      char_u	*action;
  {
      dictitem_T	*di1;
      hashitem_T	*hi2;
      int		todo;
      char_u	*arg_errmsg = (char_u *)N_("extend() argument");
  
      todo = (int)d2->dv_hashtab.ht_used;
      for (hi2 = d2->dv_hashtab.ht_array; todo > 0; ++hi2)
      {
  	if (!HASHITEM_EMPTY(hi2))
  	{
  	    --todo;
  	    di1 = dict_find(d1, hi2->hi_key, -1);
  	    if (d1->dv_scope != 0)
  	    {
  		/* Disallow replacing a builtin function in l: and g:.
  		 * Check the key to be valid when adding to any
  		 * scope. */
  		if (d1->dv_scope == VAR_DEF_SCOPE
  			&& HI2DI(hi2)->di_tv.v_type == VAR_FUNC
  			&& var_check_func_name(hi2->hi_key,
  							 di1 == NULL))
  		    break;
  		if (!valid_varname(hi2->hi_key))
  		    break;
  	    }
  	    if (di1 == NULL)
  	    {
  		di1 = dictitem_copy(HI2DI(hi2));
  		if (di1 != NULL && dict_add(d1, di1) == FAIL)
  		    dictitem_free(di1);
  	    }
  	    else if (*action == 'e')
  	    {
  		EMSG2(_("E737: Key already exists: %s"), hi2->hi_key);
  		break;
  	    }
  	    else if (*action == 'f' && HI2DI(hi2) != di1)
  	    {
  		if (tv_check_lock(di1->di_tv.v_lock, arg_errmsg, TRUE)
  		      || var_check_ro(di1->di_flags, arg_errmsg, TRUE))
  		    break;
  		clear_tv(&di1->di_tv);
  		copy_tv(&HI2DI(hi2)->di_tv, &di1->di_tv);
  	    }
  	}
      }
  }
  
  /*
   * "extend(list, list [, idx])" function
   * "extend(dict, dict [, action])" function
   */
      static void
  f_extend(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u      *arg_errmsg = (char_u *)N_("extend() argument");
  
      if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
      {
  	list_T		*l1, *l2;
  	listitem_T	*item;
  	long		before;
  	int		error = FALSE;
  
  	l1 = argvars[0].vval.v_list;
  	l2 = argvars[1].vval.v_list;
  	if (l1 != NULL && !tv_check_lock(l1->lv_lock, arg_errmsg, TRUE)
  		&& l2 != NULL)
  	{
  	    if (argvars[2].v_type != VAR_UNKNOWN)
  	    {
  		before = get_tv_number_chk(&argvars[2], &error);
  		if (error)
  		    return;		/* type error; errmsg already given */
  
  		if (before == l1->lv_len)
  		    item = NULL;
  		else
  		{
  		    item = list_find(l1, before);
  		    if (item == NULL)
  		    {
  			EMSGN(_(e_listidx), before);
  			return;
  		    }
  		}
  	    }
  	    else
  		item = NULL;
  	    list_extend(l1, l2, item);
  
  	    copy_tv(&argvars[0], rettv);
  	}
      }
      else if (argvars[0].v_type == VAR_DICT && argvars[1].v_type == VAR_DICT)
      {
  	dict_T	*d1, *d2;
  	char_u	*action;
  	int	i;
  
  	d1 = argvars[0].vval.v_dict;
  	d2 = argvars[1].vval.v_dict;
  	if (d1 != NULL && !tv_check_lock(d1->dv_lock, arg_errmsg, TRUE)
  		&& d2 != NULL)
  	{
  	    /* Check the third argument. */
  	    if (argvars[2].v_type != VAR_UNKNOWN)
  	    {
  		static char *(av[]) = {"keep", "force", "error"};
  
  		action = get_tv_string_chk(&argvars[2]);
  		if (action == NULL)
  		    return;		/* type error; errmsg already given */
  		for (i = 0; i < 3; ++i)
  		    if (STRCMP(action, av[i]) == 0)
  			break;
  		if (i == 3)
  		{
  		    EMSG2(_(e_invarg2), action);
  		    return;
  		}
  	    }
  	    else
  		action = (char_u *)"force";
  
  	    dict_extend(d1, d2, action);
  
  	    copy_tv(&argvars[0], rettv);
  	}
      }
      else
  	EMSG2(_(e_listdictarg), "extend()");
  }
  
  /*
   * "feedkeys()" function
   */
      static void
  f_feedkeys(argvars, rettv)
      typval_T    *argvars;
      typval_T    *rettv UNUSED;
  {
      int		remap = TRUE;
      int		insert = FALSE;
      char_u	*keys, *flags;
      char_u	nbuf[NUMBUFLEN];
      int		typed = FALSE;
      char_u	*keys_esc;
  
      /* This is not allowed in the sandbox.  If the commands would still be
       * executed in the sandbox it would be OK, but it probably happens later,
       * when "sandbox" is no longer set. */
      if (check_secure())
  	return;
  
      keys = get_tv_string(&argvars[0]);
      if (*keys != NUL)
      {
  	if (argvars[1].v_type != VAR_UNKNOWN)
  	{
  	    flags = get_tv_string_buf(&argvars[1], nbuf);
  	    for ( ; *flags != NUL; ++flags)
  	    {
  		switch (*flags)
  		{
  		    case 'n': remap = FALSE; break;
  		    case 'm': remap = TRUE; break;
  		    case 't': typed = TRUE; break;
  		    case 'i': insert = TRUE; break;
  		}
  	    }
  	}
  
  	/* Need to escape K_SPECIAL and CSI before putting the string in the
  	 * typeahead buffer. */
  	keys_esc = vim_strsave_escape_csi(keys);
  	if (keys_esc != NULL)
  	{
  	    ins_typebuf(keys_esc, (remap ? REMAP_YES : REMAP_NONE),
  				  insert ? 0 : typebuf.tb_len, !typed, FALSE);
  	    vim_free(keys_esc);
  	    if (vgetc_busy)
  		typebuf_was_filled = TRUE;
  	}
      }
  }
  
  /*
   * "filereadable()" function
   */
      static void
  f_filereadable(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		fd;
      char_u	*p;
      int		n;
  
  #ifndef O_NONBLOCK
  # define O_NONBLOCK 0
  #endif
      p = get_tv_string(&argvars[0]);
      if (*p && !mch_isdir(p) && (fd = mch_open((char *)p,
  					      O_RDONLY | O_NONBLOCK, 0)) >= 0)
      {
  	n = TRUE;
  	close(fd);
      }
      else
  	n = FALSE;
  
      rettv->vval.v_number = n;
  }
  
  /*
   * Return 0 for not writable, 1 for writable file, 2 for a dir which we have
   * rights to write into.
   */
      static void
  f_filewritable(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = filewritable(get_tv_string(&argvars[0]));
  }
  
  static void findfilendir __ARGS((typval_T *argvars, typval_T *rettv, int find_what));
  
      static void
  findfilendir(argvars, rettv, find_what)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
      int		find_what UNUSED;
  {
  #ifdef FEAT_SEARCHPATH
      char_u	*fname;
      char_u	*fresult = NULL;
      char_u	*path = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
      char_u	*p;
      char_u	pathbuf[NUMBUFLEN];
      int		count = 1;
      int		first = TRUE;
      int		error = FALSE;
  #endif
  
      rettv->vval.v_string = NULL;
      rettv->v_type = VAR_STRING;
  
  #ifdef FEAT_SEARCHPATH
      fname = get_tv_string(&argvars[0]);
  
      if (argvars[1].v_type != VAR_UNKNOWN)
      {
  	p = get_tv_string_buf_chk(&argvars[1], pathbuf);
  	if (p == NULL)
  	    error = TRUE;
  	else
  	{
  	    if (*p != NUL)
  		path = p;
  
  	    if (argvars[2].v_type != VAR_UNKNOWN)
  		count = get_tv_number_chk(&argvars[2], &error);
  	}
      }
  
      if (count < 0 && rettv_list_alloc(rettv) == FAIL)
  	error = TRUE;
  
      if (*fname != NUL && !error)
      {
  	do
  	{
  	    if (rettv->v_type == VAR_STRING || rettv->v_type == VAR_LIST)
  		vim_free(fresult);
  	    fresult = find_file_in_path_option(first ? fname : NULL,
  					       first ? (int)STRLEN(fname) : 0,
  					0, first, path,
  					find_what,
  					curbuf->b_ffname,
  					find_what == FINDFILE_DIR
  					    ? (char_u *)"" : curbuf->b_p_sua);
  	    first = FALSE;
  
  	    if (fresult != NULL && rettv->v_type == VAR_LIST)
  		list_append_string(rettv->vval.v_list, fresult, -1);
  
  	} while ((rettv->v_type == VAR_LIST || --count > 0) && fresult != NULL);
      }
  
      if (rettv->v_type == VAR_STRING)
  	rettv->vval.v_string = fresult;
  #endif
  }
  
  static void filter_map __ARGS((typval_T *argvars, typval_T *rettv, int map));
  static int filter_map_one __ARGS((typval_T *tv, char_u *expr, int map, int *remp));
  
  /*
   * Implementation of map() and filter().
   */
      static void
  filter_map(argvars, rettv, map)
      typval_T	*argvars;
      typval_T	*rettv;
      int		map;
  {
      char_u	buf[NUMBUFLEN];
      char_u	*expr;
      listitem_T	*li, *nli;
      list_T	*l = NULL;
      dictitem_T	*di;
      hashtab_T	*ht;
      hashitem_T	*hi;
      dict_T	*d = NULL;
      typval_T	save_val;
      typval_T	save_key;
      int		rem;
      int		todo;
      char_u	*ermsg = (char_u *)(map ? "map()" : "filter()");
      char_u	*arg_errmsg = (char_u *)(map ? N_("map() argument")
  				   : N_("filter() argument"));
      int		save_did_emsg;
      int		idx = 0;
  
      if (argvars[0].v_type == VAR_LIST)
      {
  	if ((l = argvars[0].vval.v_list) == NULL
  	      || (!map && tv_check_lock(l->lv_lock, arg_errmsg, TRUE)))
  	    return;
      }
      else if (argvars[0].v_type == VAR_DICT)
      {
  	if ((d = argvars[0].vval.v_dict) == NULL
  	      || (!map && tv_check_lock(d->dv_lock, arg_errmsg, TRUE)))
  	    return;
      }
      else
      {
  	EMSG2(_(e_listdictarg), ermsg);
  	return;
      }
  
      expr = get_tv_string_buf_chk(&argvars[1], buf);
      /* On type errors, the preceding call has already displayed an error
       * message.  Avoid a misleading error message for an empty string that
       * was not passed as argument. */
      if (expr != NULL)
      {
  	prepare_vimvar(VV_VAL, &save_val);
  	expr = skipwhite(expr);
  
  	/* We reset "did_emsg" to be able to detect whether an error
  	 * occurred during evaluation of the expression. */
  	save_did_emsg = did_emsg;
  	did_emsg = FALSE;
  
  	prepare_vimvar(VV_KEY, &save_key);
  	if (argvars[0].v_type == VAR_DICT)
  	{
  	    vimvars[VV_KEY].vv_type = VAR_STRING;
  
  	    ht = &d->dv_hashtab;
  	    hash_lock(ht);
  	    todo = (int)ht->ht_used;
  	    for (hi = ht->ht_array; todo > 0; ++hi)
  	    {
  		if (!HASHITEM_EMPTY(hi))
  		{
  		    int r;
  
  		    --todo;
  		    di = HI2DI(hi);
  		    if (map &&
  			    (tv_check_lock(di->di_tv.v_lock, arg_errmsg, TRUE)
  			    || var_check_ro(di->di_flags, arg_errmsg, TRUE)))
  			break;
  		    vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
  		    r = filter_map_one(&di->di_tv, expr, map, &rem);
  		    clear_tv(&vimvars[VV_KEY].vv_tv);
  		    if (r == FAIL || did_emsg)
  			break;
  		    if (!map && rem)
  		    {
  			if (var_check_fixed(di->di_flags, arg_errmsg, TRUE)
  			    || var_check_ro(di->di_flags, arg_errmsg, TRUE))
  			    break;
  			dictitem_remove(d, di);
  		    }
  		}
  	    }
  	    hash_unlock(ht);
  	}
  	else
  	{
  	    vimvars[VV_KEY].vv_type = VAR_NUMBER;
  
  	    for (li = l->lv_first; li != NULL; li = nli)
  	    {
  		if (map && tv_check_lock(li->li_tv.v_lock, arg_errmsg, TRUE))
  		    break;
  		nli = li->li_next;
  		vimvars[VV_KEY].vv_nr = idx;
  		if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL
  								  || did_emsg)
  		    break;
  		if (!map && rem)
  		    listitem_remove(l, li);
  		++idx;
  	    }
  	}
  
  	restore_vimvar(VV_KEY, &save_key);
  	restore_vimvar(VV_VAL, &save_val);
  
  	did_emsg |= save_did_emsg;
      }
  
      copy_tv(&argvars[0], rettv);
  }
  
      static int
  filter_map_one(tv, expr, map, remp)
      typval_T	*tv;
      char_u	*expr;
      int		map;
      int		*remp;
  {
      typval_T	rettv;
      char_u	*s;
      int		retval = FAIL;
  
      copy_tv(tv, &vimvars[VV_VAL].vv_tv);
      s = expr;
      if (eval1(&s, &rettv, TRUE) == FAIL)
  	goto theend;
      if (*s != NUL)  /* check for trailing chars after expr */
      {
  	EMSG2(_(e_invexpr2), s);
  	clear_tv(&rettv);
  	goto theend;
      }
      if (map)
      {
  	/* map(): replace the list item value */
  	clear_tv(tv);
  	rettv.v_lock = 0;
  	*tv = rettv;
      }
      else
      {
  	int	    error = FALSE;
  
  	/* filter(): when expr is zero remove the item */
  	*remp = (get_tv_number_chk(&rettv, &error) == 0);
  	clear_tv(&rettv);
  	/* On type error, nothing has been removed; return FAIL to stop the
  	 * loop.  The error message was given by get_tv_number_chk(). */
  	if (error)
  	    goto theend;
      }
      retval = OK;
  theend:
      clear_tv(&vimvars[VV_VAL].vv_tv);
      return retval;
  }
  
  /*
   * "filter()" function
   */
      static void
  f_filter(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      filter_map(argvars, rettv, FALSE);
  }
  
  /*
   * "finddir({fname}[, {path}[, {count}]])" function
   */
      static void
  f_finddir(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      findfilendir(argvars, rettv, FINDFILE_DIR);
  }
  
  /*
   * "findfile({fname}[, {path}[, {count}]])" function
   */
      static void
  f_findfile(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      findfilendir(argvars, rettv, FINDFILE_FILE);
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "float2nr({float})" function
   */
      static void
  f_float2nr(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      if (get_float_arg(argvars, &f) == OK)
      {
  	if (f < -0x7fffffff)
  	    rettv->vval.v_number = -0x7fffffff;
  	else if (f > 0x7fffffff)
  	    rettv->vval.v_number = 0x7fffffff;
  	else
  	    rettv->vval.v_number = (varnumber_T)f;
      }
  }
  
  /*
   * "floor({float})" function
   */
      static void
  f_floor(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = floor(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  
  /*
   * "fmod()" function
   */
      static void
  f_fmod(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	fx, fy;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &fx) == OK
  				     && get_float_arg(&argvars[1], &fy) == OK)
  	rettv->vval.v_float = fmod(fx, fy);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  /*
   * "fnameescape({string})" function
   */
      static void
  f_fnameescape(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_string = vim_strsave_fnameescape(
  					   get_tv_string(&argvars[0]), FALSE);
      rettv->v_type = VAR_STRING;
  }
  
  /*
   * "fnamemodify({fname}, {mods})" function
   */
      static void
  f_fnamemodify(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*fname;
      char_u	*mods;
      int		usedlen = 0;
      int		len;
      char_u	*fbuf = NULL;
      char_u	buf[NUMBUFLEN];
  
      fname = get_tv_string_chk(&argvars[0]);
      mods = get_tv_string_buf_chk(&argvars[1], buf);
      if (fname == NULL || mods == NULL)
  	fname = NULL;
      else
      {
  	len = (int)STRLEN(fname);
  	(void)modify_fname(mods, &usedlen, &fname, &fbuf, &len);
      }
  
      rettv->v_type = VAR_STRING;
      if (fname == NULL)
  	rettv->vval.v_string = NULL;
      else
  	rettv->vval.v_string = vim_strnsave(fname, len);
      vim_free(fbuf);
  }
  
  static void foldclosed_both __ARGS((typval_T *argvars, typval_T *rettv, int end));
  
  /*
   * "foldclosed()" function
   */
      static void
  foldclosed_both(argvars, rettv, end)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
      int		end UNUSED;
  {
  #ifdef FEAT_FOLDING
      linenr_T	lnum;
      linenr_T	first, last;
  
      lnum = get_tv_lnum(argvars);
      if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
      {
  	if (hasFoldingWin(curwin, lnum, &first, &last, FALSE, NULL))
  	{
  	    if (end)
  		rettv->vval.v_number = (varnumber_T)last;
  	    else
  		rettv->vval.v_number = (varnumber_T)first;
  	    return;
  	}
      }
  #endif
      rettv->vval.v_number = -1;
  }
  
  /*
   * "foldclosed()" function
   */
      static void
  f_foldclosed(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      foldclosed_both(argvars, rettv, FALSE);
  }
  
  /*
   * "foldclosedend()" function
   */
      static void
  f_foldclosedend(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      foldclosed_both(argvars, rettv, TRUE);
  }
  
  /*
   * "foldlevel()" function
   */
      static void
  f_foldlevel(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_FOLDING
      linenr_T	lnum;
  
      lnum = get_tv_lnum(argvars);
      if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
  	rettv->vval.v_number = foldLevel(lnum);
  #endif
  }
  
  /*
   * "foldtext()" function
   */
      static void
  f_foldtext(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_FOLDING
      linenr_T	lnum;
      char_u	*s;
      char_u	*r;
      int		len;
      char	*txt;
  #endif
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  #ifdef FEAT_FOLDING
      if ((linenr_T)vimvars[VV_FOLDSTART].vv_nr > 0
  	    && (linenr_T)vimvars[VV_FOLDEND].vv_nr
  						 <= curbuf->b_ml.ml_line_count
  	    && vimvars[VV_FOLDDASHES].vv_str != NULL)
      {
  	/* Find first non-empty line in the fold. */
  	lnum = (linenr_T)vimvars[VV_FOLDSTART].vv_nr;
  	while (lnum < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
  	{
  	    if (!linewhite(lnum))
  		break;
  	    ++lnum;
  	}
  
  	/* Find interesting text in this line. */
  	s = skipwhite(ml_get(lnum));
  	/* skip C comment-start */
  	if (s[0] == '/' && (s[1] == '*' || s[1] == '/'))
  	{
  	    s = skipwhite(s + 2);
  	    if (*skipwhite(s) == NUL
  			    && lnum + 1 < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
  	    {
  		s = skipwhite(ml_get(lnum + 1));
  		if (*s == '*')
  		    s = skipwhite(s + 1);
  	    }
  	}
  	txt = _("+-%s%3ld lines: ");
  	r = alloc((unsigned)(STRLEN(txt)
  		    + STRLEN(vimvars[VV_FOLDDASHES].vv_str)    /* for %s */
  		    + 20				    /* for %3ld */
  		    + STRLEN(s)));			    /* concatenated */
  	if (r != NULL)
  	{
  	    sprintf((char *)r, txt, vimvars[VV_FOLDDASHES].vv_str,
  		    (long)((linenr_T)vimvars[VV_FOLDEND].vv_nr
  				- (linenr_T)vimvars[VV_FOLDSTART].vv_nr + 1));
  	    len = (int)STRLEN(r);
  	    STRCAT(r, s);
  	    /* remove 'foldmarker' and 'commentstring' */
  	    foldtext_cleanup(r + len);
  	    rettv->vval.v_string = r;
  	}
      }
  #endif
  }
  
  /*
   * "foldtextresult(lnum)" function
   */
      static void
  f_foldtextresult(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_FOLDING
      linenr_T	lnum;
      char_u	*text;
      char_u	buf[51];
      foldinfo_T  foldinfo;
      int		fold_count;
  #endif
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  #ifdef FEAT_FOLDING
      lnum = get_tv_lnum(argvars);
      /* treat illegal types and illegal string values for {lnum} the same */
      if (lnum < 0)
  	lnum = 0;
      fold_count = foldedCount(curwin, lnum, &foldinfo);
      if (fold_count > 0)
      {
  	text = get_foldtext(curwin, lnum, lnum + fold_count - 1,
  							      &foldinfo, buf);
  	if (text == buf)
  	    text = vim_strsave(text);
  	rettv->vval.v_string = text;
      }
  #endif
  }
  
  /*
   * "foreground()" function
   */
      static void
  f_foreground(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_GUI
      if (gui.in_use)
  	gui_mch_set_foreground();
  #else
  # ifdef WIN32
      win32_set_foreground();
  # endif
  #endif
  }
  
  /*
   * "function()" function
   */
      static void
  f_function(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*s;
  
      s = get_tv_string(&argvars[0]);
      if (s == NULL || *s == NUL || VIM_ISDIGIT(*s))
  	EMSG2(_(e_invarg2), s);
      /* Don't check an autoload name for existence here. */
      else if (vim_strchr(s, AUTOLOAD_CHAR) == NULL && !function_exists(s))
  	EMSG2(_("E700: Unknown function: %s"), s);
      else
      {
  	if (STRNCMP(s, "s:", 2) == 0 || STRNCMP(s, "<SID>", 5) == 0)
  	{
  	    char	sid_buf[25];
  	    int		off = *s == 's' ? 2 : 5;
  
  	    /* Expand s: and <SID> into <SNR>nr_, so that the function can
  	     * also be called from another script. Using trans_function_name()
  	     * would also work, but some plugins depend on the name being
  	     * printable text. */
  	    sprintf(sid_buf, "<SNR>%ld_", (long)current_SID);
  	    rettv->vval.v_string =
  			    alloc((int)(STRLEN(sid_buf) + STRLEN(s + off) + 1));
  	    if (rettv->vval.v_string != NULL)
  	    {
  		STRCPY(rettv->vval.v_string, sid_buf);
  		STRCAT(rettv->vval.v_string, s + off);
  	    }
  	}
  	else
  	    rettv->vval.v_string = vim_strsave(s);
  	rettv->v_type = VAR_FUNC;
      }
  }
  
  /*
   * "garbagecollect()" function
   */
      static void
  f_garbagecollect(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv UNUSED;
  {
      /* This is postponed until we are back at the toplevel, because we may be
       * using Lists and Dicts internally.  E.g.: ":echo [garbagecollect()]". */
      want_garbage_collect = TRUE;
  
      if (argvars[0].v_type != VAR_UNKNOWN && get_tv_number(&argvars[0]) == 1)
  	garbage_collect_at_exit = TRUE;
  }
  
  /*
   * "get()" function
   */
      static void
  f_get(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      listitem_T	*li;
      list_T	*l;
      dictitem_T	*di;
      dict_T	*d;
      typval_T	*tv = NULL;
  
      if (argvars[0].v_type == VAR_LIST)
      {
  	if ((l = argvars[0].vval.v_list) != NULL)
  	{
  	    int		error = FALSE;
  
  	    li = list_find(l, get_tv_number_chk(&argvars[1], &error));
  	    if (!error && li != NULL)
  		tv = &li->li_tv;
  	}
      }
      else if (argvars[0].v_type == VAR_DICT)
      {
  	if ((d = argvars[0].vval.v_dict) != NULL)
  	{
  	    di = dict_find(d, get_tv_string(&argvars[1]), -1);
  	    if (di != NULL)
  		tv = &di->di_tv;
  	}
      }
      else
  	EMSG2(_(e_listdictarg), "get()");
  
      if (tv == NULL)
      {
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	    copy_tv(&argvars[2], rettv);
      }
      else
  	copy_tv(tv, rettv);
  }
  
  static void get_buffer_lines __ARGS((buf_T *buf, linenr_T start, linenr_T end, int retlist, typval_T *rettv));
  
  /*
   * Get line or list of lines from buffer "buf" into "rettv".
   * Return a range (from start to end) of lines in rettv from the specified
   * buffer.
   * If 'retlist' is TRUE, then the lines are returned as a Vim List.
   */
      static void
  get_buffer_lines(buf, start, end, retlist, rettv)
      buf_T	*buf;
      linenr_T	start;
      linenr_T	end;
      int		retlist;
      typval_T	*rettv;
  {
      char_u	*p;
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
      if (retlist && rettv_list_alloc(rettv) == FAIL)
  	return;
  
      if (buf == NULL || buf->b_ml.ml_mfp == NULL || start < 0)
  	return;
  
      if (!retlist)
      {
  	if (start >= 1 && start <= buf->b_ml.ml_line_count)
  	    p = ml_get_buf(buf, start, FALSE);
  	else
  	    p = (char_u *)"";
  	rettv->vval.v_string = vim_strsave(p);
      }
      else
      {
  	if (end < start)
  	    return;
  
  	if (start < 1)
  	    start = 1;
  	if (end > buf->b_ml.ml_line_count)
  	    end = buf->b_ml.ml_line_count;
  	while (start <= end)
  	    if (list_append_string(rettv->vval.v_list,
  				 ml_get_buf(buf, start++, FALSE), -1) == FAIL)
  		break;
      }
  }
  
  /*
   * "getbufline()" function
   */
      static void
  f_getbufline(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      linenr_T	lnum;
      linenr_T	end;
      buf_T	*buf;
  
      (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
      ++emsg_off;
      buf = get_buf_tv(&argvars[0], FALSE);
      --emsg_off;
  
      lnum = get_tv_lnum_buf(&argvars[1], buf);
      if (argvars[2].v_type == VAR_UNKNOWN)
  	end = lnum;
      else
  	end = get_tv_lnum_buf(&argvars[2], buf);
  
      get_buffer_lines(buf, lnum, end, TRUE, rettv);
  }
  
  /*
   * "getbufvar()" function
   */
      static void
  f_getbufvar(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      buf_T	*buf;
      buf_T	*save_curbuf;
      char_u	*varname;
      dictitem_T	*v;
      int		done = FALSE;
  
      (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
      varname = get_tv_string_chk(&argvars[1]);
      ++emsg_off;
      buf = get_buf_tv(&argvars[0], FALSE);
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  
      if (buf != NULL && varname != NULL)
      {
  	/* set curbuf to be our buf, temporarily */
  	save_curbuf = curbuf;
  	curbuf = buf;
  
  	if (*varname == '&')	/* buffer-local-option */
  	{
  	    if (get_option_tv(&varname, rettv, TRUE) == OK)
  		done = TRUE;
  	}
  	else if (STRCMP(varname, "changedtick") == 0)
  	{
  	    rettv->v_type = VAR_NUMBER;
  	    rettv->vval.v_number = curbuf->b_changedtick;
  	    done = TRUE;
  	}
  	else
  	{
  	    /* Look up the variable. */
  	    /* Let getbufvar({nr}, "") return the "b:" dictionary. */
  	    v = find_var_in_ht(&curbuf->b_vars->dv_hashtab,
  							 'b', varname, FALSE);
  	    if (v != NULL)
  	    {
  		copy_tv(&v->di_tv, rettv);
  		done = TRUE;
  	    }
  	}
  
  	/* restore previous notion of curbuf */
  	curbuf = save_curbuf;
      }
  
      if (!done && argvars[2].v_type != VAR_UNKNOWN)
  	/* use the default value */
  	copy_tv(&argvars[2], rettv);
  
      --emsg_off;
  }
  
  /*
   * "getchar()" function
   */
      static void
  f_getchar(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      varnumber_T		n;
      int			error = FALSE;
  
      /* Position the cursor.  Needed after a message that ends in a space. */
      windgoto(msg_row, msg_col);
  
      ++no_mapping;
      ++allow_keys;
      for (;;)
      {
  	if (argvars[0].v_type == VAR_UNKNOWN)
  	    /* getchar(): blocking wait. */
  	    n = safe_vgetc();
  	else if (get_tv_number_chk(&argvars[0], &error) == 1)
  	    /* getchar(1): only check if char avail */
  	    n = vpeekc_any();
  	else if (error || vpeekc_any() == NUL)
  	    /* illegal argument or getchar(0) and no char avail: return zero */
  	    n = 0;
  	else
  	    /* getchar(0) and char avail: return char */
  	    n = safe_vgetc();
  
  	if (n == K_IGNORE)
  	    continue;
  	break;
      }
      --no_mapping;
      --allow_keys;
  
      vimvars[VV_MOUSE_WIN].vv_nr = 0;
      vimvars[VV_MOUSE_LNUM].vv_nr = 0;
      vimvars[VV_MOUSE_COL].vv_nr = 0;
  
      rettv->vval.v_number = n;
      if (IS_SPECIAL(n) || mod_mask != 0)
      {
  	char_u		temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
  	int		i = 0;
  
  	/* Turn a special key into three bytes, plus modifier. */
  	if (mod_mask != 0)
  	{
  	    temp[i++] = K_SPECIAL;
  	    temp[i++] = KS_MODIFIER;
  	    temp[i++] = mod_mask;
  	}
  	if (IS_SPECIAL(n))
  	{
  	    temp[i++] = K_SPECIAL;
  	    temp[i++] = K_SECOND(n);
  	    temp[i++] = K_THIRD(n);
  	}
  #ifdef FEAT_MBYTE
  	else if (has_mbyte)
  	    i += (*mb_char2bytes)(n, temp + i);
  #endif
  	else
  	    temp[i++] = n;
  	temp[i++] = NUL;
  	rettv->v_type = VAR_STRING;
  	rettv->vval.v_string = vim_strsave(temp);
  
  #ifdef FEAT_MOUSE
  	if (is_mouse_key(n))
  	{
  	    int		row = mouse_row;
  	    int		col = mouse_col;
  	    win_T	*win;
  	    linenr_T	lnum;
  # ifdef FEAT_WINDOWS
  	    win_T	*wp;
  # endif
  	    int		winnr = 1;
  
  	    if (row >= 0 && col >= 0)
  	    {
  		/* Find the window at the mouse coordinates and compute the
  		 * text position. */
  		win = mouse_find_win(&row, &col);
  		(void)mouse_comp_pos(win, &row, &col, &lnum);
  # ifdef FEAT_WINDOWS
  		for (wp = firstwin; wp != win; wp = wp->w_next)
  		    ++winnr;
  # endif
  		vimvars[VV_MOUSE_WIN].vv_nr = winnr;
  		vimvars[VV_MOUSE_LNUM].vv_nr = lnum;
  		vimvars[VV_MOUSE_COL].vv_nr = col + 1;
  	    }
  	}
  #endif
      }
  }
  
  /*
   * "getcharmod()" function
   */
      static void
  f_getcharmod(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = mod_mask;
  }
  
  /*
   * "getcmdline()" function
   */
      static void
  f_getcmdline(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = get_cmdline_str();
  }
  
  /*
   * "getcmdpos()" function
   */
      static void
  f_getcmdpos(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = get_cmdline_pos() + 1;
  }
  
  /*
   * "getcmdtype()" function
   */
      static void
  f_getcmdtype(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = alloc(2);
      if (rettv->vval.v_string != NULL)
      {
  	rettv->vval.v_string[0] = get_cmdline_type();
  	rettv->vval.v_string[1] = NUL;
      }
  }
  
  /*
   * "getcmdwintype()" function
   */
      static void
  f_getcmdwintype(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  #ifdef FEAT_CMDWIN
      rettv->vval.v_string = alloc(2);
      if (rettv->vval.v_string != NULL)
      {
  	rettv->vval.v_string[0] = cmdwin_type;
  	rettv->vval.v_string[1] = NUL;
      }
  #endif
  }
  
  /*
   * "getcwd()" function
   */
      static void
  f_getcwd(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      char_u	*cwd;
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
      cwd = alloc(MAXPATHL);
      if (cwd != NULL)
      {
  	if (mch_dirname(cwd, MAXPATHL) != FAIL)
  	{
  	    rettv->vval.v_string = vim_strsave(cwd);
  #ifdef BACKSLASH_IN_FILENAME
  	    if (rettv->vval.v_string != NULL)
  		slash_adjust(rettv->vval.v_string);
  #endif
  	}
  	vim_free(cwd);
      }
  }
  
  /*
   * "getfontname()" function
   */
      static void
  f_getfontname(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  #ifdef FEAT_GUI
      if (gui.in_use)
      {
  	GuiFont font;
  	char_u	*name = NULL;
  
  	if (argvars[0].v_type == VAR_UNKNOWN)
  	{
  	    /* Get the "Normal" font.  Either the name saved by
  	     * hl_set_font_name() or from the font ID. */
  	    font = gui.norm_font;
  	    name = hl_get_font_name();
  	}
  	else
  	{
  	    name = get_tv_string(&argvars[0]);
  	    if (STRCMP(name, "*") == 0)	    /* don't use font dialog */
  		return;
  	    font = gui_mch_get_font(name, FALSE);
  	    if (font == NOFONT)
  		return;	    /* Invalid font name, return empty string. */
  	}
  	rettv->vval.v_string = gui_mch_get_fontname(font, name);
  	if (argvars[0].v_type != VAR_UNKNOWN)
  	    gui_mch_free_font(font);
      }
  #endif
  }
  
  /*
   * "getfperm({fname})" function
   */
      static void
  f_getfperm(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*fname;
      struct stat st;
      char_u	*perm = NULL;
      char_u	flags[] = "rwx";
      int		i;
  
      fname = get_tv_string(&argvars[0]);
  
      rettv->v_type = VAR_STRING;
      if (mch_stat((char *)fname, &st) >= 0)
      {
  	perm = vim_strsave((char_u *)"---------");
  	if (perm != NULL)
  	{
  	    for (i = 0; i < 9; i++)
  	    {
  		if (st.st_mode & (1 << (8 - i)))
  		    perm[i] = flags[i % 3];
  	    }
  	}
      }
      rettv->vval.v_string = perm;
  }
  
  /*
   * "getfsize({fname})" function
   */
      static void
  f_getfsize(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*fname;
      struct stat	st;
  
      fname = get_tv_string(&argvars[0]);
  
      rettv->v_type = VAR_NUMBER;
  
      if (mch_stat((char *)fname, &st) >= 0)
      {
  	if (mch_isdir(fname))
  	    rettv->vval.v_number = 0;
  	else
  	{
  	    rettv->vval.v_number = (varnumber_T)st.st_size;
  
  	    /* non-perfect check for overflow */
  	    if ((off_t)rettv->vval.v_number != (off_t)st.st_size)
  		rettv->vval.v_number = -2;
  	}
      }
      else
  	  rettv->vval.v_number = -1;
  }
  
  /*
   * "getftime({fname})" function
   */
      static void
  f_getftime(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*fname;
      struct stat	st;
  
      fname = get_tv_string(&argvars[0]);
  
      if (mch_stat((char *)fname, &st) >= 0)
  	rettv->vval.v_number = (varnumber_T)st.st_mtime;
      else
  	rettv->vval.v_number = -1;
  }
  
  /*
   * "getftype({fname})" function
   */
      static void
  f_getftype(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*fname;
      struct stat st;
      char_u	*type = NULL;
      char	*t;
  
      fname = get_tv_string(&argvars[0]);
  
      rettv->v_type = VAR_STRING;
      if (mch_lstat((char *)fname, &st) >= 0)
      {
  #ifdef S_ISREG
  	if (S_ISREG(st.st_mode))
  	    t = "file";
  	else if (S_ISDIR(st.st_mode))
  	    t = "dir";
  # ifdef S_ISLNK
  	else if (S_ISLNK(st.st_mode))
  	    t = "link";
  # endif
  # ifdef S_ISBLK
  	else if (S_ISBLK(st.st_mode))
  	    t = "bdev";
  # endif
  # ifdef S_ISCHR
  	else if (S_ISCHR(st.st_mode))
  	    t = "cdev";
  # endif
  # ifdef S_ISFIFO
  	else if (S_ISFIFO(st.st_mode))
  	    t = "fifo";
  # endif
  # ifdef S_ISSOCK
  	else if (S_ISSOCK(st.st_mode))
  	    t = "fifo";
  # endif
  	else
  	    t = "other";
  #else
  # ifdef S_IFMT
  	switch (st.st_mode & S_IFMT)
  	{
  	    case S_IFREG: t = "file"; break;
  	    case S_IFDIR: t = "dir"; break;
  #  ifdef S_IFLNK
  	    case S_IFLNK: t = "link"; break;
  #  endif
  #  ifdef S_IFBLK
  	    case S_IFBLK: t = "bdev"; break;
  #  endif
  #  ifdef S_IFCHR
  	    case S_IFCHR: t = "cdev"; break;
  #  endif
  #  ifdef S_IFIFO
  	    case S_IFIFO: t = "fifo"; break;
  #  endif
  #  ifdef S_IFSOCK
  	    case S_IFSOCK: t = "socket"; break;
  #  endif
  	    default: t = "other";
  	}
  # else
  	if (mch_isdir(fname))
  	    t = "dir";
  	else
  	    t = "file";
  # endif
  #endif
  	type = vim_strsave((char_u *)t);
      }
      rettv->vval.v_string = type;
  }
  
  /*
   * "getline(lnum, [end])" function
   */
      static void
  f_getline(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      linenr_T	lnum;
      linenr_T	end;
      int		retlist;
  
      lnum = get_tv_lnum(argvars);
      if (argvars[1].v_type == VAR_UNKNOWN)
      {
  	end = 0;
  	retlist = FALSE;
      }
      else
      {
  	end = get_tv_lnum(&argvars[1]);
  	retlist = TRUE;
      }
  
      get_buffer_lines(curbuf, lnum, end, retlist, rettv);
  }
  
  /*
   * "getmatches()" function
   */
      static void
  f_getmatches(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_SEARCH_EXTRA
      dict_T	*dict;
      matchitem_T	*cur = curwin->w_match_head;
      int		i;
  
      if (rettv_list_alloc(rettv) == OK)
      {
  	while (cur != NULL)
  	{
  	    dict = dict_alloc();
  	    if (dict == NULL)
  		return;
  	    if (cur->match.regprog == NULL)
  	    {
  		/* match added with matchaddpos() */
  		for (i = 0; i < MAXPOSMATCH; ++i)
  		{
  		    llpos_T	*llpos;
  		    char	buf[6];
  		    list_T	*l;
  
  		    llpos = &cur->pos.pos[i];
  		    if (llpos->lnum == 0)
  			break;
  		    l = list_alloc();
  		    if (l == NULL)
  			break;
  		    list_append_number(l, (varnumber_T)llpos->lnum);
  		    if (llpos->col > 0)
  		    {
  			list_append_number(l, (varnumber_T)llpos->col);
  			list_append_number(l, (varnumber_T)llpos->len);
  		    }
  		    sprintf(buf, "pos%d", i + 1);
  		    dict_add_list(dict, buf, l);
  		}
  	    }
  	    else
  	    {
  		dict_add_nr_str(dict, "pattern", 0L, cur->pattern);
  	    }
  	    dict_add_nr_str(dict, "group", 0L, syn_id2name(cur->hlg_id));
  	    dict_add_nr_str(dict, "priority", (long)cur->priority, NULL);
  	    dict_add_nr_str(dict, "id", (long)cur->id, NULL);
  	    list_append_dict(rettv->vval.v_list, dict);
  	    cur = cur->next;
  	}
      }
  #endif
  }
  
  /*
   * "getpid()" function
   */
      static void
  f_getpid(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = mch_get_pid();
  }
  
  static void getpos_both __ARGS((typval_T *argvars, typval_T *rettv, int getcurpos));
  
  /*
   * "getcurpos()" function
   */
      static void
  f_getcurpos(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      getpos_both(argvars, rettv, TRUE);
  }
  
  /*
   * "getpos(string)" function
   */
      static void
  f_getpos(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      getpos_both(argvars, rettv, FALSE);
  }
  
      static void
  getpos_both(argvars, rettv, getcurpos)
      typval_T	*argvars;
      typval_T	*rettv;
      int		getcurpos;
  {
      pos_T	*fp;
      list_T	*l;
      int		fnum = -1;
  
      if (rettv_list_alloc(rettv) == OK)
      {
  	l = rettv->vval.v_list;
  	if (getcurpos)
  	    fp = &curwin->w_cursor;
  	else
  	    fp = var2fpos(&argvars[0], TRUE, &fnum);
  	if (fnum != -1)
  	    list_append_number(l, (varnumber_T)fnum);
  	else
  	    list_append_number(l, (varnumber_T)0);
  	list_append_number(l, (fp != NULL) ? (varnumber_T)fp->lnum
  							    : (varnumber_T)0);
  	list_append_number(l, (fp != NULL)
  		     ? (varnumber_T)(fp->col == MAXCOL ? MAXCOL : fp->col + 1)
  							    : (varnumber_T)0);
  	list_append_number(l,
  #ifdef FEAT_VIRTUALEDIT
  				(fp != NULL) ? (varnumber_T)fp->coladd :
  #endif
  							      (varnumber_T)0);
  	if (getcurpos)
  	    list_append_number(l, curwin->w_curswant == MAXCOL ?
  		    (varnumber_T)MAXCOL : (varnumber_T)curwin->w_curswant + 1);
      }
      else
  	rettv->vval.v_number = FALSE;
  }
  
  /*
   * "getqflist()" and "getloclist()" functions
   */
      static void
  f_getqflist(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_QUICKFIX
      win_T	*wp;
  #endif
  
  #ifdef FEAT_QUICKFIX
      if (rettv_list_alloc(rettv) == OK)
      {
  	wp = NULL;
  	if (argvars[0].v_type != VAR_UNKNOWN)	/* getloclist() */
  	{
  	    wp = find_win_by_nr(&argvars[0], NULL);
  	    if (wp == NULL)
  		return;
  	}
  
  	(void)get_errorlist(wp, rettv->vval.v_list);
      }
  #endif
  }
  
  /*
   * "getreg()" function
   */
      static void
  f_getreg(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*strregname;
      int		regname;
      int		arg2 = FALSE;
      int		return_list = FALSE;
      int		error = FALSE;
  
      if (argvars[0].v_type != VAR_UNKNOWN)
      {
  	strregname = get_tv_string_chk(&argvars[0]);
  	error = strregname == NULL;
  	if (argvars[1].v_type != VAR_UNKNOWN)
  	{
  	    arg2 = get_tv_number_chk(&argvars[1], &error);
  	    if (!error && argvars[2].v_type != VAR_UNKNOWN)
  		return_list = get_tv_number_chk(&argvars[2], &error);
  	}
      }
      else
  	strregname = vimvars[VV_REG].vv_str;
  
      if (error)
  	return;
  
      regname = (strregname == NULL ? '"' : *strregname);
      if (regname == 0)
  	regname = '"';
  
      if (return_list)
      {
  	rettv->v_type = VAR_LIST;
  	rettv->vval.v_list = (list_T *)get_reg_contents(regname,
  				      (arg2 ? GREG_EXPR_SRC : 0) | GREG_LIST);
  	if (rettv->vval.v_list != NULL)
  	    ++rettv->vval.v_list->lv_refcount;
      }
      else
      {
  	rettv->v_type = VAR_STRING;
  	rettv->vval.v_string = get_reg_contents(regname,
  						    arg2 ? GREG_EXPR_SRC : 0);
      }
  }
  
  /*
   * "getregtype()" function
   */
      static void
  f_getregtype(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*strregname;
      int		regname;
      char_u	buf[NUMBUFLEN + 2];
      long	reglen = 0;
  
      if (argvars[0].v_type != VAR_UNKNOWN)
      {
  	strregname = get_tv_string_chk(&argvars[0]);
  	if (strregname == NULL)	    /* type error; errmsg already given */
  	{
  	    rettv->v_type = VAR_STRING;
  	    rettv->vval.v_string = NULL;
  	    return;
  	}
      }
      else
  	/* Default to v:register */
  	strregname = vimvars[VV_REG].vv_str;
  
      regname = (strregname == NULL ? '"' : *strregname);
      if (regname == 0)
  	regname = '"';
  
      buf[0] = NUL;
      buf[1] = NUL;
      switch (get_reg_type(regname, &reglen))
      {
  	case MLINE: buf[0] = 'V'; break;
  	case MCHAR: buf[0] = 'v'; break;
  	case MBLOCK:
  		buf[0] = Ctrl_V;
  		sprintf((char *)buf + 1, "%ld", reglen + 1);
  		break;
      }
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = vim_strsave(buf);
  }
  
  /*
   * "gettabvar()" function
   */
      static void
  f_gettabvar(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      win_T	*oldcurwin;
      tabpage_T	*tp, *oldtabpage;
      dictitem_T	*v;
      char_u	*varname;
      int		done = FALSE;
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  
      varname = get_tv_string_chk(&argvars[1]);
      tp = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
      if (tp != NULL && varname != NULL)
      {
  	/* Set tp to be our tabpage, temporarily.  Also set the window to the
  	 * first window in the tabpage, otherwise the window is not valid. */
  	if (switch_win(&oldcurwin, &oldtabpage, tp->tp_firstwin, tp, TRUE)
  									== OK)
  	{
  	    /* look up the variable */
  	    /* Let gettabvar({nr}, "") return the "t:" dictionary. */
  	    v = find_var_in_ht(&tp->tp_vars->dv_hashtab, 't', varname, FALSE);
  	    if (v != NULL)
  	    {
  		copy_tv(&v->di_tv, rettv);
  		done = TRUE;
  	    }
  	}
  
  	/* restore previous notion of curwin */
  	restore_win(oldcurwin, oldtabpage, TRUE);
      }
  
      if (!done && argvars[2].v_type != VAR_UNKNOWN)
  	copy_tv(&argvars[2], rettv);
  }
  
  /*
   * "gettabwinvar()" function
   */
      static void
  f_gettabwinvar(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      getwinvar(argvars, rettv, 1);
  }
  
  /*
   * "getwinposx()" function
   */
      static void
  f_getwinposx(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = -1;
  #ifdef FEAT_GUI
      if (gui.in_use)
      {
  	int	    x, y;
  
  	if (gui_mch_get_winpos(&x, &y) == OK)
  	    rettv->vval.v_number = x;
      }
  #endif
  }
  
  /*
   * "getwinposy()" function
   */
      static void
  f_getwinposy(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = -1;
  #ifdef FEAT_GUI
      if (gui.in_use)
      {
  	int	    x, y;
  
  	if (gui_mch_get_winpos(&x, &y) == OK)
  	    rettv->vval.v_number = y;
      }
  #endif
  }
  
  /*
   * Find window specified by "vp" in tabpage "tp".
   */
      static win_T *
  find_win_by_nr(vp, tp)
      typval_T	*vp;
      tabpage_T	*tp UNUSED;	/* NULL for current tab page */
  {
  #ifdef FEAT_WINDOWS
      win_T	*wp;
  #endif
      int		nr;
  
      nr = get_tv_number_chk(vp, NULL);
  
  #ifdef FEAT_WINDOWS
      if (nr < 0)
  	return NULL;
      if (nr == 0)
  	return curwin;
  
      for (wp = (tp == NULL || tp == curtab) ? firstwin : tp->tp_firstwin;
  						  wp != NULL; wp = wp->w_next)
  	if (--nr <= 0)
  	    break;
      return wp;
  #else
      if (nr == 0 || nr == 1)
  	return curwin;
      return NULL;
  #endif
  }
  
  /*
   * "getwinvar()" function
   */
      static void
  f_getwinvar(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      getwinvar(argvars, rettv, 0);
  }
  
  /*
   * getwinvar() and gettabwinvar()
   */
      static void
  getwinvar(argvars, rettv, off)
      typval_T	*argvars;
      typval_T	*rettv;
      int		off;	    /* 1 for gettabwinvar() */
  {
      win_T	*win, *oldcurwin;
      char_u	*varname;
      dictitem_T	*v;
      tabpage_T	*tp = NULL;
      tabpage_T	*oldtabpage;
      int		done = FALSE;
  
  #ifdef FEAT_WINDOWS
      if (off == 1)
  	tp = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
      else
  	tp = curtab;
  #endif
      win = find_win_by_nr(&argvars[off], tp);
      varname = get_tv_string_chk(&argvars[off + 1]);
      ++emsg_off;
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  
      if (win != NULL && varname != NULL)
      {
  	/* Set curwin to be our win, temporarily.  Also set the tabpage,
  	 * otherwise the window is not valid. */
  	if (switch_win(&oldcurwin, &oldtabpage, win, tp, TRUE) == OK)
  	{
  	    if (*varname == '&')	/* window-local-option */
  	    {
  		if (get_option_tv(&varname, rettv, 1) == OK)
  		    done = TRUE;
  	    }
  	    else
  	    {
  		/* Look up the variable. */
  		/* Let getwinvar({nr}, "") return the "w:" dictionary. */
  		v = find_var_in_ht(&win->w_vars->dv_hashtab, 'w',
  							      varname, FALSE);
  		if (v != NULL)
  		{
  		    copy_tv(&v->di_tv, rettv);
  		    done = TRUE;
  		}
  	    }
  	}
  
  	/* restore previous notion of curwin */
  	restore_win(oldcurwin, oldtabpage, TRUE);
      }
  
      if (!done && argvars[off + 2].v_type != VAR_UNKNOWN)
  	/* use the default return value */
  	copy_tv(&argvars[off + 2], rettv);
  
      --emsg_off;
  }
  
  /*
   * "glob()" function
   */
      static void
  f_glob(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		options = WILD_SILENT|WILD_USE_NL;
      expand_T	xpc;
      int		error = FALSE;
  
      /* When the optional second argument is non-zero, don't remove matches
       * for 'wildignore' and don't put matches for 'suffixes' at the end. */
      rettv->v_type = VAR_STRING;
      if (argvars[1].v_type != VAR_UNKNOWN)
      {
  	if (get_tv_number_chk(&argvars[1], &error))
  	    options |= WILD_KEEP_ALL;
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	{
  	    if (get_tv_number_chk(&argvars[2], &error))
  	    {
  		rettv->v_type = VAR_LIST;
  		rettv->vval.v_list = NULL;
  	    }
  	    if (argvars[3].v_type != VAR_UNKNOWN
  				    && get_tv_number_chk(&argvars[3], &error))
  		options |= WILD_ALLLINKS;
  	}
      }
      if (!error)
      {
  	ExpandInit(&xpc);
  	xpc.xp_context = EXPAND_FILES;
  	if (p_wic)
  	    options += WILD_ICASE;
  	if (rettv->v_type == VAR_STRING)
  	    rettv->vval.v_string = ExpandOne(&xpc, get_tv_string(&argvars[0]),
  						     NULL, options, WILD_ALL);
  	else if (rettv_list_alloc(rettv) != FAIL)
  	{
  	  int i;
  
  	  ExpandOne(&xpc, get_tv_string(&argvars[0]),
  						NULL, options, WILD_ALL_KEEP);
  	  for (i = 0; i < xpc.xp_numfiles; i++)
  	      list_append_string(rettv->vval.v_list, xpc.xp_files[i], -1);
  
  	  ExpandCleanup(&xpc);
  	}
      }
      else
  	rettv->vval.v_string = NULL;
  }
  
  /*
   * "globpath()" function
   */
      static void
  f_globpath(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		flags = 0;
      char_u	buf1[NUMBUFLEN];
      char_u	*file = get_tv_string_buf_chk(&argvars[1], buf1);
      int		error = FALSE;
      garray_T	ga;
      int		i;
  
      /* When the optional second argument is non-zero, don't remove matches
      * for 'wildignore' and don't put matches for 'suffixes' at the end. */
      rettv->v_type = VAR_STRING;
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	if (get_tv_number_chk(&argvars[2], &error))
  	    flags |= WILD_KEEP_ALL;
  	if (argvars[3].v_type != VAR_UNKNOWN)
  	{
  	    if (get_tv_number_chk(&argvars[3], &error))
  	    {
  		rettv->v_type = VAR_LIST;
  		rettv->vval.v_list = NULL;
  	    }
  	    if (argvars[4].v_type != VAR_UNKNOWN
  				    && get_tv_number_chk(&argvars[4], &error))
  		flags |= WILD_ALLLINKS;
  	}
      }
      if (file != NULL && !error)
      {
  	ga_init2(&ga, (int)sizeof(char_u *), 10);
  	globpath(get_tv_string(&argvars[0]), file, &ga, flags);
  	if (rettv->v_type == VAR_STRING)
  	    rettv->vval.v_string = ga_concat_strings(&ga, "\n");
  	else if (rettv_list_alloc(rettv) != FAIL)
  	    for (i = 0; i < ga.ga_len; ++i)
  		list_append_string(rettv->vval.v_list,
  					    ((char_u **)(ga.ga_data))[i], -1);
  	ga_clear_strings(&ga);
      }
      else
  	rettv->vval.v_string = NULL;
  }
  
  /*
   * "glob2regpat()" function
   */
      static void
  f_glob2regpat(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*pat = get_tv_string_chk(&argvars[0]);
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = file_pat_to_reg_pat(pat, NULL, NULL, FALSE);
  }
  
  /*
   * "has()" function
   */
      static void
  f_has(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		i;
      char_u	*name;
      int		n = FALSE;
      static char	*(has_list[]) =
      {
  #ifdef AMIGA
  	"amiga",
  # ifdef FEAT_ARP
  	"arp",
  # endif
  #endif
  #ifdef __BEOS__
  	"beos",
  #endif
  #ifdef MSDOS
  # ifdef DJGPP
  	"dos32",
  # else
  	"dos16",
  # endif
  #endif
  #ifdef MACOS
  	"mac",
  #endif
  #if defined(MACOS_X_UNIX)
  	"macunix",
  #endif
  #ifdef OS2
  	"os2",
  #endif
  #ifdef __QNX__
  	"qnx",
  #endif
  #ifdef UNIX
  	"unix",
  #endif
  #ifdef VMS
  	"vms",
  #endif
  #ifdef WIN16
  	"win16",
  #endif
  #ifdef WIN32
  	"win32",
  #endif
  #if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
  	"win32unix",
  #endif
  #if defined(WIN64) || defined(_WIN64)
  	"win64",
  #endif
  #ifdef EBCDIC
  	"ebcdic",
  #endif
  #ifndef CASE_INSENSITIVE_FILENAME
  	"fname_case",
  #endif
  #ifdef HAVE_ACL
  	"acl",
  #endif
  #ifdef FEAT_ARABIC
  	"arabic",
  #endif
  #ifdef FEAT_AUTOCMD
  	"autocmd",
  #endif
  #ifdef FEAT_BEVAL
  	"balloon_eval",
  # ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
  	"balloon_multiline",
  # endif
  #endif
  #if defined(SOME_BUILTIN_TCAPS) || defined(ALL_BUILTIN_TCAPS)
  	"builtin_terms",
  # ifdef ALL_BUILTIN_TCAPS
  	"all_builtin_terms",
  # endif
  #endif
  #if defined(FEAT_BROWSE) && (defined(USE_FILE_CHOOSER) \
  	|| defined(FEAT_GUI_W32) \
  	|| defined(FEAT_GUI_MOTIF))
  	"browsefilter",
  #endif
  #ifdef FEAT_BYTEOFF
  	"byte_offset",
  #endif
  #ifdef FEAT_CINDENT
  	"cindent",
  #endif
  #ifdef FEAT_CLIENTSERVER
  	"clientserver",
  #endif
  #ifdef FEAT_CLIPBOARD
  	"clipboard",
  #endif
  #ifdef FEAT_CMDL_COMPL
  	"cmdline_compl",
  #endif
  #ifdef FEAT_CMDHIST
  	"cmdline_hist",
  #endif
  #ifdef FEAT_COMMENTS
  	"comments",
  #endif
  #ifdef FEAT_CONCEAL
  	"conceal",
  #endif
  #ifdef FEAT_CRYPT
  	"cryptv",
  #endif
  #ifdef FEAT_CSCOPE
  	"cscope",
  #endif
  #ifdef FEAT_CURSORBIND
  	"cursorbind",
  #endif
  #ifdef CURSOR_SHAPE
  	"cursorshape",
  #endif
  #ifdef DEBUG
  	"debug",
  #endif
  #ifdef FEAT_CON_DIALOG
  	"dialog_con",
  #endif
  #ifdef FEAT_GUI_DIALOG
  	"dialog_gui",
  #endif
  #ifdef FEAT_DIFF
  	"diff",
  #endif
  #ifdef FEAT_DIGRAPHS
  	"digraphs",
  #endif
  #ifdef FEAT_DIRECTX
  	"directx",
  #endif
  #ifdef FEAT_DND
  	"dnd",
  #endif
  #ifdef FEAT_EMACS_TAGS
  	"emacs_tags",
  #endif
  	"eval",	    /* always present, of course! */
  #ifdef FEAT_EX_EXTRA
  	"ex_extra",
  #endif
  #ifdef FEAT_SEARCH_EXTRA
  	"extra_search",
  #endif
  #ifdef FEAT_FKMAP
  	"farsi",
  #endif
  #ifdef FEAT_SEARCHPATH
  	"file_in_path",
  #endif
  #ifdef FEAT_FILTERPIPE
  	"filterpipe",
  #endif
  #ifdef FEAT_FIND_ID
  	"find_in_path",
  #endif
  #ifdef FEAT_FLOAT
  	"float",
  #endif
  #ifdef FEAT_FOLDING
  	"folding",
  #endif
  #ifdef FEAT_FOOTER
  	"footer",
  #endif
  #if !defined(USE_SYSTEM) && defined(UNIX)
  	"fork",
  #endif
  #ifdef FEAT_GETTEXT
  	"gettext",
  #endif
  #ifdef FEAT_GUI
  	"gui",
  #endif
  #ifdef FEAT_GUI_ATHENA
  # ifdef FEAT_GUI_NEXTAW
  	"gui_neXtaw",
  # else
  	"gui_athena",
  # endif
  #endif
  #ifdef FEAT_GUI_GTK
  	"gui_gtk",
  	"gui_gtk2",
  #endif
  #ifdef FEAT_GUI_GNOME
  	"gui_gnome",
  #endif
  #ifdef FEAT_GUI_MAC
  	"gui_mac",
  #endif
  #ifdef FEAT_GUI_MOTIF
  	"gui_motif",
  #endif
  #ifdef FEAT_GUI_PHOTON
  	"gui_photon",
  #endif
  #ifdef FEAT_GUI_W16
  	"gui_win16",
  #endif
  #ifdef FEAT_GUI_W32
  	"gui_win32",
  #endif
  #ifdef FEAT_HANGULIN
  	"hangul_input",
  #endif
  #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
  	"iconv",
  #endif
  #ifdef FEAT_INS_EXPAND
  	"insert_expand",
  #endif
  #ifdef FEAT_JUMPLIST
  	"jumplist",
  #endif
  #ifdef FEAT_KEYMAP
  	"keymap",
  #endif
  #ifdef FEAT_LANGMAP
  	"langmap",
  #endif
  #ifdef FEAT_LIBCALL
  	"libcall",
  #endif
  #ifdef FEAT_LINEBREAK
  	"linebreak",
  #endif
  #ifdef FEAT_LISP
  	"lispindent",
  #endif
  #ifdef FEAT_LISTCMDS
  	"listcmds",
  #endif
  #ifdef FEAT_LOCALMAP
  	"localmap",
  #endif
  #ifdef FEAT_LUA
  # ifndef DYNAMIC_LUA
  	"lua",
  # endif
  #endif
  #ifdef FEAT_MENU
  	"menu",
  #endif
  #ifdef FEAT_SESSION
  	"mksession",
  #endif
  #ifdef FEAT_MODIFY_FNAME
  	"modify_fname",
  #endif
  #ifdef FEAT_MOUSE
  	"mouse",
  #endif
  #ifdef FEAT_MOUSESHAPE
  	"mouseshape",
  #endif
  #if defined(UNIX) || defined(VMS)
  # ifdef FEAT_MOUSE_DEC
  	"mouse_dec",
  # endif
  # ifdef FEAT_MOUSE_GPM
  	"mouse_gpm",
  # endif
  # ifdef FEAT_MOUSE_JSB
  	"mouse_jsbterm",
  # endif
  # ifdef FEAT_MOUSE_NET
  	"mouse_netterm",
  # endif
  # ifdef FEAT_MOUSE_PTERM
  	"mouse_pterm",
  # endif
  # ifdef FEAT_MOUSE_SGR
  	"mouse_sgr",
  # endif
  # ifdef FEAT_SYSMOUSE
  	"mouse_sysmouse",
  # endif
  # ifdef FEAT_MOUSE_URXVT
  	"mouse_urxvt",
  # endif
  # ifdef FEAT_MOUSE_XTERM
  	"mouse_xterm",
  # endif
  #endif
  #ifdef FEAT_MBYTE
  	"multi_byte",
  #endif
  #ifdef FEAT_MBYTE_IME
  	"multi_byte_ime",
  #endif
  #ifdef FEAT_MULTI_LANG
  	"multi_lang",
  #endif
  #ifdef FEAT_MZSCHEME
  #ifndef DYNAMIC_MZSCHEME
  	"mzscheme",
  #endif
  #endif
  #ifdef FEAT_OLE
  	"ole",
  #endif
  #ifdef FEAT_PATH_EXTRA
  	"path_extra",
  #endif
  #ifdef FEAT_PERL
  #ifndef DYNAMIC_PERL
  	"perl",
  #endif
  #endif
  #ifdef FEAT_PERSISTENT_UNDO
  	"persistent_undo",
  #endif
  #ifdef FEAT_PYTHON
  #ifndef DYNAMIC_PYTHON
  	"python",
  #endif
  #endif
  #ifdef FEAT_PYTHON3
  #ifndef DYNAMIC_PYTHON3
  	"python3",
  #endif
  #endif
  #ifdef FEAT_POSTSCRIPT
  	"postscript",
  #endif
  #ifdef FEAT_PRINTER
  	"printer",
  #endif
  #ifdef FEAT_PROFILE
  	"profile",
  #endif
  #ifdef FEAT_RELTIME
  	"reltime",
  #endif
  #ifdef FEAT_QUICKFIX
  	"quickfix",
  #endif
  #ifdef FEAT_RIGHTLEFT
  	"rightleft",
  #endif
  #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
  	"ruby",
  #endif
  #ifdef FEAT_SCROLLBIND
  	"scrollbind",
  #endif
  #ifdef FEAT_CMDL_INFO
  	"showcmd",
  	"cmdline_info",
  #endif
  #ifdef FEAT_SIGNS
  	"signs",
  #endif
  #ifdef FEAT_SMARTINDENT
  	"smartindent",
  #endif
  #ifdef FEAT_SNIFF
  	"sniff",
  #endif
  #ifdef STARTUPTIME
  	"startuptime",
  #endif
  #ifdef FEAT_STL_OPT
  	"statusline",
  #endif
  #ifdef FEAT_SUN_WORKSHOP
  	"sun_workshop",
  #endif
  #ifdef FEAT_NETBEANS_INTG
  	"netbeans_intg",
  #endif
  #ifdef FEAT_SPELL
  	"spell",
  #endif
  #ifdef FEAT_SYN_HL
  	"syntax",
  #endif
  #if defined(USE_SYSTEM) || !defined(UNIX)
  	"system",
  #endif
  #ifdef FEAT_TAG_BINS
  	"tag_binary",
  #endif
  #ifdef FEAT_TAG_OLDSTATIC
  	"tag_old_static",
  #endif
  #ifdef FEAT_TAG_ANYWHITE
  	"tag_any_white",
  #endif
  #ifdef FEAT_TCL
  # ifndef DYNAMIC_TCL
  	"tcl",
  # endif
  #endif
  #ifdef TERMINFO
  	"terminfo",
  #endif
  #ifdef FEAT_TERMRESPONSE
  	"termresponse",
  #endif
  #ifdef FEAT_TERMTRUECOLOR
  	"termtruecolor",
  #endif
  #ifdef FEAT_TEXTOBJ
  	"textobjects",
  #endif
  #ifdef HAVE_TGETENT
  	"tgetent",
  #endif
  #ifdef FEAT_TITLE
  	"title",
  #endif
  #ifdef FEAT_TOOLBAR
  	"toolbar",
  #endif
  #if defined(FEAT_CLIPBOARD) && defined(FEAT_X11)
  	"unnamedplus",
  #endif
  #ifdef FEAT_USR_CMDS
  	"user-commands",    /* was accidentally included in 5.4 */
  	"user_commands",
  #endif
  #ifdef FEAT_VIMINFO
  	"viminfo",
  #endif
  #ifdef FEAT_VERTSPLIT
  	"vertsplit",
  #endif
  #ifdef FEAT_VIRTUALEDIT
  	"virtualedit",
  #endif
  	"visual",
  #ifdef FEAT_VISUALEXTRA
  	"visualextra",
  #endif
  #ifdef FEAT_VREPLACE
  	"vreplace",
  #endif
  #ifdef FEAT_WILDIGN
  	"wildignore",
  #endif
  #ifdef FEAT_WILDMENU
  	"wildmenu",
  #endif
  #ifdef FEAT_WINDOWS
  	"windows",
  #endif
  #ifdef FEAT_WAK
  	"winaltkeys",
  #endif
  #ifdef FEAT_WRITEBACKUP
  	"writebackup",
  #endif
  #ifdef FEAT_XIM
  	"xim",
  #endif
  #ifdef FEAT_XFONTSET
  	"xfontset",
  #endif
  #ifdef FEAT_XPM_W32
  	"xpm",
  	"xpm_w32",	/* for backward compatibility */
  #else
  # if defined(HAVE_XPM)
  	"xpm",
  # endif
  #endif
  #ifdef USE_XSMP
  	"xsmp",
  #endif
  #ifdef USE_XSMP_INTERACT
  	"xsmp_interact",
  #endif
  #ifdef FEAT_XCLIPBOARD
  	"xterm_clipboard",
  #endif
  #ifdef FEAT_XTERM_SAVE
  	"xterm_save",
  #endif
  #if defined(UNIX) && defined(FEAT_X11)
  	"X11",
  #endif
  	NULL
      };
  
      name = get_tv_string(&argvars[0]);
      for (i = 0; has_list[i] != NULL; ++i)
  	if (STRICMP(name, has_list[i]) == 0)
  	{
  	    n = TRUE;
  	    break;
  	}
  
      if (n == FALSE)
      {
  	if (STRNICMP(name, "patch", 5) == 0)
  	{
  	    if (name[5] == '-'
  		    && STRLEN(name) > 11
  		    && vim_isdigit(name[6])
  		    && vim_isdigit(name[8])
  		    && vim_isdigit(name[10]))
  	    {
  		int major = atoi((char *)name + 6);
  		int minor = atoi((char *)name + 8);
  
  		/* Expect "patch-9.9.01234". */
  		n = (major < VIM_VERSION_MAJOR
  		     || (major == VIM_VERSION_MAJOR
  			 && (minor < VIM_VERSION_MINOR
  			     || (minor == VIM_VERSION_MINOR
  				 && has_patch(atoi((char *)name + 10))))));
  	    }
  	    else
  		n = has_patch(atoi((char *)name + 5));
  	}
  	else if (STRICMP(name, "vim_starting") == 0)
  	    n = (starting != 0);
  #ifdef FEAT_MBYTE
  	else if (STRICMP(name, "multi_byte_encoding") == 0)
  	    n = has_mbyte;
  #endif
  #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
  	else if (STRICMP(name, "balloon_multiline") == 0)
  	    n = multiline_balloon_available();
  #endif
  #ifdef DYNAMIC_TCL
  	else if (STRICMP(name, "tcl") == 0)
  	    n = tcl_enabled(FALSE);
  #endif
  #if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
  	else if (STRICMP(name, "iconv") == 0)
  	    n = iconv_enabled(FALSE);
  #endif
  #ifdef DYNAMIC_LUA
  	else if (STRICMP(name, "lua") == 0)
  	    n = lua_enabled(FALSE);
  #endif
  #ifdef DYNAMIC_MZSCHEME
  	else if (STRICMP(name, "mzscheme") == 0)
  	    n = mzscheme_enabled(FALSE);
  #endif
  #ifdef DYNAMIC_RUBY
  	else if (STRICMP(name, "ruby") == 0)
  	    n = ruby_enabled(FALSE);
  #endif
  #ifdef FEAT_PYTHON
  #ifdef DYNAMIC_PYTHON
  	else if (STRICMP(name, "python") == 0)
  	    n = python_enabled(FALSE);
  #endif
  #endif
  #ifdef FEAT_PYTHON3
  #ifdef DYNAMIC_PYTHON3
  	else if (STRICMP(name, "python3") == 0)
  	    n = python3_enabled(FALSE);
  #endif
  #endif
  #ifdef DYNAMIC_PERL
  	else if (STRICMP(name, "perl") == 0)
  	    n = perl_enabled(FALSE);
  #endif
  #ifdef FEAT_GUI
  	else if (STRICMP(name, "gui_running") == 0)
  	    n = (gui.in_use || gui.starting);
  # ifdef FEAT_GUI_W32
  	else if (STRICMP(name, "gui_win32s") == 0)
  	    n = gui_is_win32s();
  # endif
  # ifdef FEAT_BROWSE
  	else if (STRICMP(name, "browse") == 0)
  	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
  # endif
  #endif
  #ifdef FEAT_SYN_HL
  	else if (STRICMP(name, "syntax_items") == 0)
  	    n = syntax_present(curwin);
  #endif
  #if defined(WIN3264)
  	else if (STRICMP(name, "win95") == 0)
  	    n = mch_windows95();
  #endif
  #ifdef FEAT_NETBEANS_INTG
  	else if (STRICMP(name, "netbeans_enabled") == 0)
  	    n = netbeans_active();
  #endif
      }
  
      rettv->vval.v_number = n;
  }
  
  /*
   * "has_key()" function
   */
      static void
  f_has_key(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      if (argvars[0].v_type != VAR_DICT)
      {
  	EMSG(_(e_dictreq));
  	return;
      }
      if (argvars[0].vval.v_dict == NULL)
  	return;
  
      rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
  				      get_tv_string(&argvars[1]), -1) != NULL;
  }
  
  /*
   * "haslocaldir()" function
   */
      static void
  f_haslocaldir(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = (curwin->w_localdir != NULL);
  }
  
  /*
   * "hasmapto()" function
   */
      static void
  f_hasmapto(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*name;
      char_u	*mode;
      char_u	buf[NUMBUFLEN];
      int		abbr = FALSE;
  
      name = get_tv_string(&argvars[0]);
      if (argvars[1].v_type == VAR_UNKNOWN)
  	mode = (char_u *)"nvo";
      else
      {
  	mode = get_tv_string_buf(&argvars[1], buf);
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	    abbr = get_tv_number(&argvars[2]);
      }
  
      if (map_to_exists(name, mode, abbr))
  	rettv->vval.v_number = TRUE;
      else
  	rettv->vval.v_number = FALSE;
  }
  
  /*
   * "histadd()" function
   */
      static void
  f_histadd(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_CMDHIST
      int		histype;
      char_u	*str;
      char_u	buf[NUMBUFLEN];
  #endif
  
      rettv->vval.v_number = FALSE;
      if (check_restricted() || check_secure())
  	return;
  #ifdef FEAT_CMDHIST
      str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
      histype = str != NULL ? get_histtype(str) : -1;
      if (histype >= 0)
      {
  	str = get_tv_string_buf(&argvars[1], buf);
  	if (*str != NUL)
  	{
  	    init_history();
  	    add_to_history(histype, str, FALSE, NUL);
  	    rettv->vval.v_number = TRUE;
  	    return;
  	}
      }
  #endif
  }
  
  /*
   * "histdel()" function
   */
      static void
  f_histdel(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_CMDHIST
      int		n;
      char_u	buf[NUMBUFLEN];
      char_u	*str;
  
      str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
      if (str == NULL)
  	n = 0;
      else if (argvars[1].v_type == VAR_UNKNOWN)
  	/* only one argument: clear entire history */
  	n = clr_history(get_histtype(str));
      else if (argvars[1].v_type == VAR_NUMBER)
  	/* index given: remove that entry */
  	n = del_history_idx(get_histtype(str),
  					  (int)get_tv_number(&argvars[1]));
      else
  	/* string given: remove all matching entries */
  	n = del_history_entry(get_histtype(str),
  				      get_tv_string_buf(&argvars[1], buf));
      rettv->vval.v_number = n;
  #endif
  }
  
  /*
   * "histget()" function
   */
      static void
  f_histget(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_CMDHIST
      int		type;
      int		idx;
      char_u	*str;
  
      str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
      if (str == NULL)
  	rettv->vval.v_string = NULL;
      else
      {
  	type = get_histtype(str);
  	if (argvars[1].v_type == VAR_UNKNOWN)
  	    idx = get_history_idx(type);
  	else
  	    idx = (int)get_tv_number_chk(&argvars[1], NULL);
  						    /* -1 on type error */
  	rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
      }
  #else
      rettv->vval.v_string = NULL;
  #endif
      rettv->v_type = VAR_STRING;
  }
  
  /*
   * "histnr()" function
   */
      static void
  f_histnr(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      int		i;
  
  #ifdef FEAT_CMDHIST
      char_u	*history = get_tv_string_chk(&argvars[0]);
  
      i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
      if (i >= HIST_CMD && i < HIST_COUNT)
  	i = get_history_idx(i);
      else
  #endif
  	i = -1;
      rettv->vval.v_number = i;
  }
  
  /*
   * "highlightID(name)" function
   */
      static void
  f_hlID(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
  }
  
  /*
   * "highlight_exists()" function
   */
      static void
  f_hlexists(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
  }
  
  /*
   * "hostname()" function
   */
      static void
  f_hostname(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      char_u hostname[256];
  
      mch_get_host_name(hostname, 256);
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = vim_strsave(hostname);
  }
  
  /*
   * iconv() function
   */
      static void
  f_iconv(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_MBYTE
      char_u	buf1[NUMBUFLEN];
      char_u	buf2[NUMBUFLEN];
      char_u	*from, *to, *str;
      vimconv_T	vimconv;
  #endif
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  
  #ifdef FEAT_MBYTE
      str = get_tv_string(&argvars[0]);
      from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
      to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
      vimconv.vc_type = CONV_NONE;
      convert_setup(&vimconv, from, to);
  
      /* If the encodings are equal, no conversion needed. */
      if (vimconv.vc_type == CONV_NONE)
  	rettv->vval.v_string = vim_strsave(str);
      else
  	rettv->vval.v_string = string_convert(&vimconv, str, NULL);
  
      convert_setup(&vimconv, NULL, NULL);
      vim_free(from);
      vim_free(to);
  #endif
  }
  
  /*
   * "indent()" function
   */
      static void
  f_indent(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      linenr_T	lnum;
  
      lnum = get_tv_lnum(argvars);
      if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
  	rettv->vval.v_number = get_indent_lnum(lnum);
      else
  	rettv->vval.v_number = -1;
  }
  
  /*
   * "index()" function
   */
      static void
  f_index(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      list_T	*l;
      listitem_T	*item;
      long	idx = 0;
      int		ic = FALSE;
  
      rettv->vval.v_number = -1;
      if (argvars[0].v_type != VAR_LIST)
      {
  	EMSG(_(e_listreq));
  	return;
      }
      l = argvars[0].vval.v_list;
      if (l != NULL)
      {
  	item = l->lv_first;
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	{
  	    int		error = FALSE;
  
  	    /* Start at specified item.  Use the cached index that list_find()
  	     * sets, so that a negative number also works. */
  	    item = list_find(l, get_tv_number_chk(&argvars[2], &error));
  	    idx = l->lv_idx;
  	    if (argvars[3].v_type != VAR_UNKNOWN)
  		ic = get_tv_number_chk(&argvars[3], &error);
  	    if (error)
  		item = NULL;
  	}
  
  	for ( ; item != NULL; item = item->li_next, ++idx)
  	    if (tv_equal(&item->li_tv, &argvars[1], ic, FALSE))
  	    {
  		rettv->vval.v_number = idx;
  		break;
  	    }
      }
  }
  
  static int inputsecret_flag = 0;
  
  static void get_user_input __ARGS((typval_T *argvars, typval_T *rettv, int inputdialog));
  
  /*
   * This function is used by f_input() and f_inputdialog() functions. The third
   * argument to f_input() specifies the type of completion to use at the
   * prompt. The third argument to f_inputdialog() specifies the value to return
   * when the user cancels the prompt.
   */
      static void
  get_user_input(argvars, rettv, inputdialog)
      typval_T	*argvars;
      typval_T	*rettv;
      int		inputdialog;
  {
      char_u	*prompt = get_tv_string_chk(&argvars[0]);
      char_u	*p = NULL;
      int		c;
      char_u	buf[NUMBUFLEN];
      int		cmd_silent_save = cmd_silent;
      char_u	*defstr = (char_u *)"";
      int		xp_type = EXPAND_NOTHING;
      char_u	*xp_arg = NULL;
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  
  #ifdef NO_CONSOLE_INPUT
      /* While starting up, there is no place to enter text. */
      if (no_console_input())
  	return;
  #endif
  
      cmd_silent = FALSE;		/* Want to see the prompt. */
      if (prompt != NULL)
      {
  	/* Only the part of the message after the last NL is considered as
  	 * prompt for the command line */
  	p = vim_strrchr(prompt, '\n');
  	if (p == NULL)
  	    p = prompt;
  	else
  	{
  	    ++p;
  	    c = *p;
  	    *p = NUL;
  	    msg_start();
  	    msg_clr_eos();
  	    msg_puts_attr(prompt, echo_attr);
  	    msg_didout = FALSE;
  	    msg_starthere();
  	    *p = c;
  	}
  	cmdline_row = msg_row;
  
  	if (argvars[1].v_type != VAR_UNKNOWN)
  	{
  	    defstr = get_tv_string_buf_chk(&argvars[1], buf);
  	    if (defstr != NULL)
  		stuffReadbuffSpec(defstr);
  
  	    if (!inputdialog && argvars[2].v_type != VAR_UNKNOWN)
  	    {
  		char_u	*xp_name;
  		int	xp_namelen;
  		long	argt;
  
  		/* input() with a third argument: completion */
  		rettv->vval.v_string = NULL;
  
  		xp_name = get_tv_string_buf_chk(&argvars[2], buf);
  		if (xp_name == NULL)
  		    return;
  
  		xp_namelen = (int)STRLEN(xp_name);
  
  		if (parse_compl_arg(xp_name, xp_namelen, &xp_type, &argt,
  							     &xp_arg) == FAIL)
  		    return;
  	    }
  	}
  
  	if (defstr != NULL)
  	{
  # ifdef FEAT_EX_EXTRA
  	    int save_ex_normal_busy = ex_normal_busy;
  	    ex_normal_busy = 0;
  # endif
  	    rettv->vval.v_string =
  		getcmdline_prompt(inputsecret_flag ? NUL : '@', p, echo_attr,
  				  xp_type, xp_arg);
  # ifdef FEAT_EX_EXTRA
  	    ex_normal_busy = save_ex_normal_busy;
  # endif
  	}
  	if (inputdialog && rettv->vval.v_string == NULL
  		&& argvars[1].v_type != VAR_UNKNOWN
  		&& argvars[2].v_type != VAR_UNKNOWN)
  	    rettv->vval.v_string = vim_strsave(get_tv_string_buf(
  							   &argvars[2], buf));
  
  	vim_free(xp_arg);
  
  	/* since the user typed this, no need to wait for return */
  	need_wait_return = FALSE;
  	msg_didout = FALSE;
      }
      cmd_silent = cmd_silent_save;
  }
  
  /*
   * "input()" function
   *     Also handles inputsecret() when inputsecret is set.
   */
      static void
  f_input(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      get_user_input(argvars, rettv, FALSE);
  }
  
  /*
   * "inputdialog()" function
   */
      static void
  f_inputdialog(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
  #if defined(FEAT_GUI_TEXTDIALOG)
      /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
      if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
      {
  	char_u	*message;
  	char_u	buf[NUMBUFLEN];
  	char_u	*defstr = (char_u *)"";
  
  	message = get_tv_string_chk(&argvars[0]);
  	if (argvars[1].v_type != VAR_UNKNOWN
  		&& (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
  	    vim_strncpy(IObuff, defstr, IOSIZE - 1);
  	else
  	    IObuff[0] = NUL;
  	if (message != NULL && defstr != NULL
  		&& do_dialog(VIM_QUESTION, NULL, message,
  			  (char_u *)_("&OK\n&Cancel"), 1, IObuff, FALSE) == 1)
  	    rettv->vval.v_string = vim_strsave(IObuff);
  	else
  	{
  	    if (message != NULL && defstr != NULL
  					&& argvars[1].v_type != VAR_UNKNOWN
  					&& argvars[2].v_type != VAR_UNKNOWN)
  		rettv->vval.v_string = vim_strsave(
  				      get_tv_string_buf(&argvars[2], buf));
  	    else
  		rettv->vval.v_string = NULL;
  	}
  	rettv->v_type = VAR_STRING;
      }
      else
  #endif
  	get_user_input(argvars, rettv, TRUE);
  }
  
  /*
   * "inputlist()" function
   */
      static void
  f_inputlist(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      listitem_T	*li;
      int		selected;
      int		mouse_used;
  
  #ifdef NO_CONSOLE_INPUT
      /* While starting up, there is no place to enter text. */
      if (no_console_input())
  	return;
  #endif
      if (argvars[0].v_type != VAR_LIST || argvars[0].vval.v_list == NULL)
      {
  	EMSG2(_(e_listarg), "inputlist()");
  	return;
      }
  
      msg_start();
      msg_row = Rows - 1;	/* for when 'cmdheight' > 1 */
      lines_left = Rows;	/* avoid more prompt */
      msg_scroll = TRUE;
      msg_clr_eos();
  
      for (li = argvars[0].vval.v_list->lv_first; li != NULL; li = li->li_next)
      {
  	msg_puts(get_tv_string(&li->li_tv));
  	msg_putchar('\n');
      }
  
      /* Ask for choice. */
      selected = prompt_for_number(&mouse_used);
      if (mouse_used)
  	selected -= lines_left;
  
      rettv->vval.v_number = selected;
  }
  
  
  static garray_T	    ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};
  
  /*
   * "inputrestore()" function
   */
      static void
  f_inputrestore(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      if (ga_userinput.ga_len > 0)
      {
  	--ga_userinput.ga_len;
  	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
  						       + ga_userinput.ga_len);
  	/* default return is zero == OK */
      }
      else if (p_verbose > 1)
      {
  	verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
  	rettv->vval.v_number = 1; /* Failed */
      }
  }
  
  /*
   * "inputsave()" function
   */
      static void
  f_inputsave(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      /* Add an entry to the stack of typeahead storage. */
      if (ga_grow(&ga_userinput, 1) == OK)
      {
  	save_typeahead((tasave_T *)(ga_userinput.ga_data)
  						       + ga_userinput.ga_len);
  	++ga_userinput.ga_len;
  	/* default return is zero == OK */
      }
      else
  	rettv->vval.v_number = 1; /* Failed */
  }
  
  /*
   * "inputsecret()" function
   */
      static void
  f_inputsecret(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      ++cmdline_star;
      ++inputsecret_flag;
      f_input(argvars, rettv);
      --cmdline_star;
      --inputsecret_flag;
  }
  
  /*
   * "insert()" function
   */
      static void
  f_insert(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      long	before = 0;
      listitem_T	*item;
      list_T	*l;
      int		error = FALSE;
  
      if (argvars[0].v_type != VAR_LIST)
  	EMSG2(_(e_listarg), "insert()");
      else if ((l = argvars[0].vval.v_list) != NULL
  	    && !tv_check_lock(l->lv_lock, (char_u *)N_("insert() argument"), TRUE))
      {
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	    before = get_tv_number_chk(&argvars[2], &error);
  	if (error)
  	    return;		/* type error; errmsg already given */
  
  	if (before == l->lv_len)
  	    item = NULL;
  	else
  	{
  	    item = list_find(l, before);
  	    if (item == NULL)
  	    {
  		EMSGN(_(e_listidx), before);
  		l = NULL;
  	    }
  	}
  	if (l != NULL)
  	{
  	    list_insert_tv(l, &argvars[1], item);
  	    copy_tv(&argvars[0], rettv);
  	}
      }
  }
  
  /*
   * "invert(expr)" function
   */
      static void
  f_invert(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = ~get_tv_number_chk(&argvars[0], NULL);
  }
  
  /*
   * "isdirectory()" function
   */
      static void
  f_isdirectory(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
  }
  
  /*
   * "islocked()" function
   */
      static void
  f_islocked(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      lval_T	lv;
      char_u	*end;
      dictitem_T	*di;
  
      rettv->vval.v_number = -1;
      end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE,
  					GLV_NO_AUTOLOAD, FNE_CHECK_START);
      if (end != NULL && lv.ll_name != NULL)
      {
  	if (*end != NUL)
  	    EMSG(_(e_trailing));
  	else
  	{
  	    if (lv.ll_tv == NULL)
  	    {
  		if (check_changedtick(lv.ll_name))
  		    rettv->vval.v_number = 1;	    /* always locked */
  		else
  		{
  		    di = find_var(lv.ll_name, NULL, TRUE);
  		    if (di != NULL)
  		    {
  			/* Consider a variable locked when:
  			 * 1. the variable itself is locked
  			 * 2. the value of the variable is locked.
  			 * 3. the List or Dict value is locked.
  			 */
  			rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
  						  || tv_islocked(&di->di_tv));
  		    }
  		}
  	    }
  	    else if (lv.ll_range)
  		EMSG(_("E786: Range not allowed"));
  	    else if (lv.ll_newkey != NULL)
  		EMSG2(_(e_dictkey), lv.ll_newkey);
  	    else if (lv.ll_list != NULL)
  		/* List item. */
  		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
  	    else
  		/* Dictionary item. */
  		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
  	}
      }
  
      clear_lval(&lv);
  }
  
  static void dict_list __ARGS((typval_T *argvars, typval_T *rettv, int what));
  
  /*
   * Turn a dict into a list:
   * "what" == 0: list of keys
   * "what" == 1: list of values
   * "what" == 2: list of items
   */
      static void
  dict_list(argvars, rettv, what)
      typval_T	*argvars;
      typval_T	*rettv;
      int		what;
  {
      list_T	*l2;
      dictitem_T	*di;
      hashitem_T	*hi;
      listitem_T	*li;
      listitem_T	*li2;
      dict_T	*d;
      int		todo;
  
      if (argvars[0].v_type != VAR_DICT)
      {
  	EMSG(_(e_dictreq));
  	return;
      }
      if ((d = argvars[0].vval.v_dict) == NULL)
  	return;
  
      if (rettv_list_alloc(rettv) == FAIL)
  	return;
  
      todo = (int)d->dv_hashtab.ht_used;
      for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
      {
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    --todo;
  	    di = HI2DI(hi);
  
  	    li = listitem_alloc();
  	    if (li == NULL)
  		break;
  	    list_append(rettv->vval.v_list, li);
  
  	    if (what == 0)
  	    {
  		/* keys() */
  		li->li_tv.v_type = VAR_STRING;
  		li->li_tv.v_lock = 0;
  		li->li_tv.vval.v_string = vim_strsave(di->di_key);
  	    }
  	    else if (what == 1)
  	    {
  		/* values() */
  		copy_tv(&di->di_tv, &li->li_tv);
  	    }
  	    else
  	    {
  		/* items() */
  		l2 = list_alloc();
  		li->li_tv.v_type = VAR_LIST;
  		li->li_tv.v_lock = 0;
  		li->li_tv.vval.v_list = l2;
  		if (l2 == NULL)
  		    break;
  		++l2->lv_refcount;
  
  		li2 = listitem_alloc();
  		if (li2 == NULL)
  		    break;
  		list_append(l2, li2);
  		li2->li_tv.v_type = VAR_STRING;
  		li2->li_tv.v_lock = 0;
  		li2->li_tv.vval.v_string = vim_strsave(di->di_key);
  
  		li2 = listitem_alloc();
  		if (li2 == NULL)
  		    break;
  		list_append(l2, li2);
  		copy_tv(&di->di_tv, &li2->li_tv);
  	    }
  	}
      }
  }
  
  /*
   * "items(dict)" function
   */
      static void
  f_items(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      dict_list(argvars, rettv, 2);
  }
  
  /*
   * "join()" function
   */
      static void
  f_join(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      garray_T	ga;
      char_u	*sep;
  
      if (argvars[0].v_type != VAR_LIST)
      {
  	EMSG(_(e_listreq));
  	return;
      }
      if (argvars[0].vval.v_list == NULL)
  	return;
      if (argvars[1].v_type == VAR_UNKNOWN)
  	sep = (char_u *)" ";
      else
  	sep = get_tv_string_chk(&argvars[1]);
  
      rettv->v_type = VAR_STRING;
  
      if (sep != NULL)
      {
  	ga_init2(&ga, (int)sizeof(char), 80);
  	list_join(&ga, argvars[0].vval.v_list, sep, TRUE, 0);
  	ga_append(&ga, NUL);
  	rettv->vval.v_string = (char_u *)ga.ga_data;
      }
      else
  	rettv->vval.v_string = NULL;
  }
  
  /*
   * "keys()" function
   */
      static void
  f_keys(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      dict_list(argvars, rettv, 0);
  }
  
  /*
   * "last_buffer_nr()" function.
   */
      static void
  f_last_buffer_nr(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      int		n = 0;
      buf_T	*buf;
  
      for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  	if (n < buf->b_fnum)
  	    n = buf->b_fnum;
  
      rettv->vval.v_number = n;
  }
  
  /*
   * "len()" function
   */
      static void
  f_len(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      switch (argvars[0].v_type)
      {
  	case VAR_STRING:
  	case VAR_NUMBER:
  	    rettv->vval.v_number = (varnumber_T)STRLEN(
  					       get_tv_string(&argvars[0]));
  	    break;
  	case VAR_LIST:
  	    rettv->vval.v_number = list_len(argvars[0].vval.v_list);
  	    break;
  	case VAR_DICT:
  	    rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
  	    break;
  	default:
  	    EMSG(_("E701: Invalid type for len()"));
  	    break;
      }
  }
  
  static void libcall_common __ARGS((typval_T *argvars, typval_T *rettv, int type));
  
      static void
  libcall_common(argvars, rettv, type)
      typval_T	*argvars;
      typval_T	*rettv;
      int		type;
  {
  #ifdef FEAT_LIBCALL
      char_u		*string_in;
      char_u		**string_result;
      int			nr_result;
  #endif
  
      rettv->v_type = type;
      if (type != VAR_NUMBER)
  	rettv->vval.v_string = NULL;
  
      if (check_restricted() || check_secure())
  	return;
  
  #ifdef FEAT_LIBCALL
      /* The first two args must be strings, otherwise its meaningless */
      if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
      {
  	string_in = NULL;
  	if (argvars[2].v_type == VAR_STRING)
  	    string_in = argvars[2].vval.v_string;
  	if (type == VAR_NUMBER)
  	    string_result = NULL;
  	else
  	    string_result = &rettv->vval.v_string;
  	if (mch_libcall(argvars[0].vval.v_string,
  			     argvars[1].vval.v_string,
  			     string_in,
  			     argvars[2].vval.v_number,
  			     string_result,
  			     &nr_result) == OK
  		&& type == VAR_NUMBER)
  	    rettv->vval.v_number = nr_result;
      }
  #endif
  }
  
  /*
   * "libcall()" function
   */
      static void
  f_libcall(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      libcall_common(argvars, rettv, VAR_STRING);
  }
  
  /*
   * "libcallnr()" function
   */
      static void
  f_libcallnr(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      libcall_common(argvars, rettv, VAR_NUMBER);
  }
  
  /*
   * "line(string)" function
   */
      static void
  f_line(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      linenr_T	lnum = 0;
      pos_T	*fp;
      int		fnum;
  
      fp = var2fpos(&argvars[0], TRUE, &fnum);
      if (fp != NULL)
  	lnum = fp->lnum;
      rettv->vval.v_number = lnum;
  }
  
  /*
   * "line2byte(lnum)" function
   */
      static void
  f_line2byte(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifndef FEAT_BYTEOFF
      rettv->vval.v_number = -1;
  #else
      linenr_T	lnum;
  
      lnum = get_tv_lnum(argvars);
      if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
  	rettv->vval.v_number = -1;
      else
  	rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
      if (rettv->vval.v_number >= 0)
  	++rettv->vval.v_number;
  #endif
  }
  
  /*
   * "lispindent(lnum)" function
   */
      static void
  f_lispindent(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_LISP
      pos_T	pos;
      linenr_T	lnum;
  
      pos = curwin->w_cursor;
      lnum = get_tv_lnum(argvars);
      if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
      {
  	curwin->w_cursor.lnum = lnum;
  	rettv->vval.v_number = get_lisp_indent();
  	curwin->w_cursor = pos;
      }
      else
  #endif
  	rettv->vval.v_number = -1;
  }
  
  /*
   * "localtime()" function
   */
      static void
  f_localtime(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = (varnumber_T)time(NULL);
  }
  
  static void get_maparg __ARGS((typval_T *argvars, typval_T *rettv, int exact));
  
      static void
  get_maparg(argvars, rettv, exact)
      typval_T	*argvars;
      typval_T	*rettv;
      int		exact;
  {
      char_u	*keys;
      char_u	*which;
      char_u	buf[NUMBUFLEN];
      char_u	*keys_buf = NULL;
      char_u	*rhs;
      int		mode;
      int		abbr = FALSE;
      int		get_dict = FALSE;
      mapblock_T	*mp;
      int		buffer_local;
  
      /* return empty string for failure */
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  
      keys = get_tv_string(&argvars[0]);
      if (*keys == NUL)
  	return;
  
      if (argvars[1].v_type != VAR_UNKNOWN)
      {
  	which = get_tv_string_buf_chk(&argvars[1], buf);
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	{
  	    abbr = get_tv_number(&argvars[2]);
  	    if (argvars[3].v_type != VAR_UNKNOWN)
  		get_dict = get_tv_number(&argvars[3]);
  	}
      }
      else
  	which = (char_u *)"";
      if (which == NULL)
  	return;
  
      mode = get_map_mode(&which, 0);
  
      keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE, FALSE);
      rhs = check_map(keys, mode, exact, FALSE, abbr, &mp, &buffer_local);
      vim_free(keys_buf);
  
      if (!get_dict)
      {
  	/* Return a string. */
  	if (rhs != NULL)
  	    rettv->vval.v_string = str2special_save(rhs, FALSE);
  
      }
      else if (rettv_dict_alloc(rettv) != FAIL && rhs != NULL)
      {
  	/* Return a dictionary. */
  	char_u	    *lhs = str2special_save(mp->m_keys, TRUE);
  	char_u	    *mapmode = map_mode_to_chars(mp->m_mode);
  	dict_T	    *dict = rettv->vval.v_dict;
  
  	dict_add_nr_str(dict, "lhs",	 0L, lhs);
  	dict_add_nr_str(dict, "rhs",     0L, mp->m_orig_str);
  	dict_add_nr_str(dict, "noremap", mp->m_noremap ? 1L : 0L , NULL);
  	dict_add_nr_str(dict, "expr",    mp->m_expr    ? 1L : 0L, NULL);
  	dict_add_nr_str(dict, "silent",  mp->m_silent  ? 1L : 0L, NULL);
  	dict_add_nr_str(dict, "sid",     (long)mp->m_script_ID, NULL);
  	dict_add_nr_str(dict, "buffer",  (long)buffer_local, NULL);
  	dict_add_nr_str(dict, "nowait",  mp->m_nowait  ? 1L : 0L, NULL);
  	dict_add_nr_str(dict, "mode",    0L, mapmode);
  
  	vim_free(lhs);
  	vim_free(mapmode);
      }
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "log()" function
   */
      static void
  f_log(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = log(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  
  /*
   * "log10()" function
   */
      static void
  f_log10(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = log10(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  #ifdef FEAT_LUA
  /*
   * "luaeval()" function
   */
      static void
  f_luaeval(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*str;
      char_u	buf[NUMBUFLEN];
  
      str = get_tv_string_buf(&argvars[0], buf);
      do_luaeval(str, argvars + 1, rettv);
  }
  #endif
  
  /*
   * "map()" function
   */
      static void
  f_map(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      filter_map(argvars, rettv, TRUE);
  }
  
  /*
   * "maparg()" function
   */
      static void
  f_maparg(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      get_maparg(argvars, rettv, TRUE);
  }
  
  /*
   * "mapcheck()" function
   */
      static void
  f_mapcheck(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      get_maparg(argvars, rettv, FALSE);
  }
  
  static void find_some_match __ARGS((typval_T *argvars, typval_T *rettv, int start));
  
      static void
  find_some_match(argvars, rettv, type)
      typval_T	*argvars;
      typval_T	*rettv;
      int		type;
  {
      char_u	*str = NULL;
      long	len = 0;
      char_u	*expr = NULL;
      char_u	*pat;
      regmatch_T	regmatch;
      char_u	patbuf[NUMBUFLEN];
      char_u	strbuf[NUMBUFLEN];
      char_u	*save_cpo;
      long	start = 0;
      long	nth = 1;
      colnr_T	startcol = 0;
      int		match = 0;
      list_T	*l = NULL;
      listitem_T	*li = NULL;
      long	idx = 0;
      char_u	*tofree = NULL;
  
      /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
      save_cpo = p_cpo;
      p_cpo = (char_u *)"";
  
      rettv->vval.v_number = -1;
      if (type == 3)
      {
  	/* return empty list when there are no matches */
  	if (rettv_list_alloc(rettv) == FAIL)
  	    goto theend;
      }
      else if (type == 2)
      {
  	rettv->v_type = VAR_STRING;
  	rettv->vval.v_string = NULL;
      }
  
      if (argvars[0].v_type == VAR_LIST)
      {
  	if ((l = argvars[0].vval.v_list) == NULL)
  	    goto theend;
  	li = l->lv_first;
      }
      else
      {
  	expr = str = get_tv_string(&argvars[0]);
  	len = (long)STRLEN(str);
      }
  
      pat = get_tv_string_buf_chk(&argvars[1], patbuf);
      if (pat == NULL)
  	goto theend;
  
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	int	    error = FALSE;
  
  	start = get_tv_number_chk(&argvars[2], &error);
  	if (error)
  	    goto theend;
  	if (l != NULL)
  	{
  	    li = list_find(l, start);
  	    if (li == NULL)
  		goto theend;
  	    idx = l->lv_idx;	/* use the cached index */
  	}
  	else
  	{
  	    if (start < 0)
  		start = 0;
  	    if (start > len)
  		goto theend;
  	    /* When "count" argument is there ignore matches before "start",
  	     * otherwise skip part of the string.  Differs when pattern is "^"
  	     * or "\<". */
  	    if (argvars[3].v_type != VAR_UNKNOWN)
  		startcol = start;
  	    else
  	    {
  		str += start;
  		len -= start;
  	    }
  	}
  
  	if (argvars[3].v_type != VAR_UNKNOWN)
  	    nth = get_tv_number_chk(&argvars[3], &error);
  	if (error)
  	    goto theend;
      }
  
      regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
      if (regmatch.regprog != NULL)
      {
  	regmatch.rm_ic = p_ic;
  
  	for (;;)
  	{
  	    if (l != NULL)
  	    {
  		if (li == NULL)
  		{
  		    match = FALSE;
  		    break;
  		}
  		vim_free(tofree);
  		str = echo_string(&li->li_tv, &tofree, strbuf, 0);
  		if (str == NULL)
  		    break;
  	    }
  
  	    match = vim_regexec_nl(&regmatch, str, (colnr_T)startcol);
  
  	    if (match && --nth <= 0)
  		break;
  	    if (l == NULL && !match)
  		break;
  
  	    /* Advance to just after the match. */
  	    if (l != NULL)
  	    {
  		li = li->li_next;
  		++idx;
  	    }
  	    else
  	    {
  #ifdef FEAT_MBYTE
  		startcol = (colnr_T)(regmatch.startp[0]
  				    + (*mb_ptr2len)(regmatch.startp[0]) - str);
  #else
  		startcol = (colnr_T)(regmatch.startp[0] + 1 - str);
  #endif
  		if (startcol > (colnr_T)len
  				      || str + startcol <= regmatch.startp[0])
  		{
  		    match = FALSE;
  		    break;
  		}
  	    }
  	}
  
  	if (match)
  	{
  	    if (type == 3)
  	    {
  		int i;
  
  		/* return list with matched string and submatches */
  		for (i = 0; i < NSUBEXP; ++i)
  		{
  		    if (regmatch.endp[i] == NULL)
  		    {
  			if (list_append_string(rettv->vval.v_list,
  						     (char_u *)"", 0) == FAIL)
  			    break;
  		    }
  		    else if (list_append_string(rettv->vval.v_list,
  				regmatch.startp[i],
  				(int)(regmatch.endp[i] - regmatch.startp[i]))
  			    == FAIL)
  			break;
  		}
  	    }
  	    else if (type == 2)
  	    {
  		/* return matched string */
  		if (l != NULL)
  		    copy_tv(&li->li_tv, rettv);
  		else
  		    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
  				(int)(regmatch.endp[0] - regmatch.startp[0]));
  	    }
  	    else if (l != NULL)
  		rettv->vval.v_number = idx;
  	    else
  	    {
  		if (type != 0)
  		    rettv->vval.v_number =
  				      (varnumber_T)(regmatch.startp[0] - str);
  		else
  		    rettv->vval.v_number =
  					(varnumber_T)(regmatch.endp[0] - str);
  		rettv->vval.v_number += (varnumber_T)(str - expr);
  	    }
  	}
  	vim_regfree(regmatch.regprog);
      }
  
  theend:
      vim_free(tofree);
      p_cpo = save_cpo;
  }
  
  /*
   * "match()" function
   */
      static void
  f_match(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      find_some_match(argvars, rettv, 1);
  }
  
  /*
   * "matchadd()" function
   */
      static void
  f_matchadd(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_SEARCH_EXTRA
      char_u	buf[NUMBUFLEN];
      char_u	*grp = get_tv_string_buf_chk(&argvars[0], buf);	/* group */
      char_u	*pat = get_tv_string_buf_chk(&argvars[1], buf);	/* pattern */
      int		prio = 10;	/* default priority */
      int		id = -1;
      int		error = FALSE;
  
      rettv->vval.v_number = -1;
  
      if (grp == NULL || pat == NULL)
  	return;
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	prio = get_tv_number_chk(&argvars[2], &error);
  	if (argvars[3].v_type != VAR_UNKNOWN)
  	    id = get_tv_number_chk(&argvars[3], &error);
      }
      if (error == TRUE)
  	return;
      if (id >= 1 && id <= 3)
      {
  	EMSGN("E798: ID is reserved for \":match\": %ld", id);
  	return;
      }
  
      rettv->vval.v_number = match_add(curwin, grp, pat, prio, id, NULL);
  #endif
  }
  
  /*
   * "matchaddpos()" function
   */
      static void
  f_matchaddpos(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_SEARCH_EXTRA
      char_u	buf[NUMBUFLEN];
      char_u	*group;
      int		prio = 10;
      int		id = -1;
      int		error = FALSE;
      list_T	*l;
  
      rettv->vval.v_number = -1;
  
      group = get_tv_string_buf_chk(&argvars[0], buf);
      if (group == NULL)
  	return;
  
      if (argvars[1].v_type != VAR_LIST)
      {
  	EMSG2(_(e_listarg), "matchaddpos()");
  	return;
      }
      l = argvars[1].vval.v_list;
      if (l == NULL)
  	return;
  
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	prio = get_tv_number_chk(&argvars[2], &error);
  	if (argvars[3].v_type != VAR_UNKNOWN)
  	    id = get_tv_number_chk(&argvars[3], &error);
      }
      if (error == TRUE)
  	return;
  
      /* id == 3 is ok because matchaddpos() is supposed to substitute :3match */
      if (id == 1 || id == 2)
      {
  	EMSGN("E798: ID is reserved for \":match\": %ld", id);
  	return;
      }
  
      rettv->vval.v_number = match_add(curwin, group, NULL, prio, id, l);
  #endif
  }
  
  /*
   * "matcharg()" function
   */
      static void
  f_matcharg(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      if (rettv_list_alloc(rettv) == OK)
      {
  #ifdef FEAT_SEARCH_EXTRA
  	int	    id = get_tv_number(&argvars[0]);
  	matchitem_T *m;
  
  	if (id >= 1 && id <= 3)
  	{
  	    if ((m = (matchitem_T *)get_match(curwin, id)) != NULL)
  	    {
  		list_append_string(rettv->vval.v_list,
  						syn_id2name(m->hlg_id), -1);
  		list_append_string(rettv->vval.v_list, m->pattern, -1);
  	    }
  	    else
  	    {
  		list_append_string(rettv->vval.v_list, NULL, -1);
  		list_append_string(rettv->vval.v_list, NULL, -1);
  	    }
  	}
  #endif
      }
  }
  
  /*
   * "matchdelete()" function
   */
      static void
  f_matchdelete(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_SEARCH_EXTRA
      rettv->vval.v_number = match_delete(curwin,
  				       (int)get_tv_number(&argvars[0]), TRUE);
  #endif
  }
  
  /*
   * "matchend()" function
   */
      static void
  f_matchend(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      find_some_match(argvars, rettv, 0);
  }
  
  /*
   * "matchlist()" function
   */
      static void
  f_matchlist(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      find_some_match(argvars, rettv, 3);
  }
  
  /*
   * "matchstr()" function
   */
      static void
  f_matchstr(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      find_some_match(argvars, rettv, 2);
  }
  
  static void max_min __ARGS((typval_T *argvars, typval_T *rettv, int domax));
  
      static void
  max_min(argvars, rettv, domax)
      typval_T	*argvars;
      typval_T	*rettv;
      int		domax;
  {
      long	n = 0;
      long	i;
      int		error = FALSE;
  
      if (argvars[0].v_type == VAR_LIST)
      {
  	list_T		*l;
  	listitem_T	*li;
  
  	l = argvars[0].vval.v_list;
  	if (l != NULL)
  	{
  	    li = l->lv_first;
  	    if (li != NULL)
  	    {
  		n = get_tv_number_chk(&li->li_tv, &error);
  		for (;;)
  		{
  		    li = li->li_next;
  		    if (li == NULL)
  			break;
  		    i = get_tv_number_chk(&li->li_tv, &error);
  		    if (domax ? i > n : i < n)
  			n = i;
  		}
  	    }
  	}
      }
      else if (argvars[0].v_type == VAR_DICT)
      {
  	dict_T		*d;
  	int		first = TRUE;
  	hashitem_T	*hi;
  	int		todo;
  
  	d = argvars[0].vval.v_dict;
  	if (d != NULL)
  	{
  	    todo = (int)d->dv_hashtab.ht_used;
  	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
  	    {
  		if (!HASHITEM_EMPTY(hi))
  		{
  		    --todo;
  		    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
  		    if (first)
  		    {
  			n = i;
  			first = FALSE;
  		    }
  		    else if (domax ? i > n : i < n)
  			n = i;
  		}
  	    }
  	}
      }
      else
  	EMSG(_(e_listdictarg));
      rettv->vval.v_number = error ? 0 : n;
  }
  
  /*
   * "max()" function
   */
      static void
  f_max(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      max_min(argvars, rettv, TRUE);
  }
  
  /*
   * "min()" function
   */
      static void
  f_min(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      max_min(argvars, rettv, FALSE);
  }
  
  static int mkdir_recurse __ARGS((char_u *dir, int prot));
  
  /*
   * Create the directory in which "dir" is located, and higher levels when
   * needed.
   */
      static int
  mkdir_recurse(dir, prot)
      char_u	*dir;
      int		prot;
  {
      char_u	*p;
      char_u	*updir;
      int		r = FAIL;
  
      /* Get end of directory name in "dir".
       * We're done when it's "/" or "c:/". */
      p = gettail_sep(dir);
      if (p <= get_past_head(dir))
  	return OK;
  
      /* If the directory exists we're done.  Otherwise: create it.*/
      updir = vim_strnsave(dir, (int)(p - dir));
      if (updir == NULL)
  	return FAIL;
      if (mch_isdir(updir))
  	r = OK;
      else if (mkdir_recurse(updir, prot) == OK)
  	r = vim_mkdir_emsg(updir, prot);
      vim_free(updir);
      return r;
  }
  
  #ifdef vim_mkdir
  /*
   * "mkdir()" function
   */
      static void
  f_mkdir(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*dir;
      char_u	buf[NUMBUFLEN];
      int		prot = 0755;
  
      rettv->vval.v_number = FAIL;
      if (check_restricted() || check_secure())
  	return;
  
      dir = get_tv_string_buf(&argvars[0], buf);
      if (*dir == NUL)
  	rettv->vval.v_number = FAIL;
      else
      {
  	if (*gettail(dir) == NUL)
  	    /* remove trailing slashes */
  	    *gettail_sep(dir) = NUL;
  
  	if (argvars[1].v_type != VAR_UNKNOWN)
  	{
  	    if (argvars[2].v_type != VAR_UNKNOWN)
  		prot = get_tv_number_chk(&argvars[2], NULL);
  	    if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
  		mkdir_recurse(dir, prot);
  	}
  	rettv->vval.v_number = prot == -1 ? FAIL : vim_mkdir_emsg(dir, prot);
      }
  }
  #endif
  
  /*
   * "mode()" function
   */
      static void
  f_mode(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	buf[3];
  
      buf[1] = NUL;
      buf[2] = NUL;
  
      if (VIsual_active)
      {
  	if (VIsual_select)
  	    buf[0] = VIsual_mode + 's' - 'v';
  	else
  	    buf[0] = VIsual_mode;
      }
      else if (State == HITRETURN || State == ASKMORE || State == SETWSIZE
  		|| State == CONFIRM)
      {
  	buf[0] = 'r';
  	if (State == ASKMORE)
  	    buf[1] = 'm';
  	else if (State == CONFIRM)
  	    buf[1] = '?';
      }
      else if (State == EXTERNCMD)
  	buf[0] = '!';
      else if (State & INSERT)
      {
  #ifdef FEAT_VREPLACE
  	if (State & VREPLACE_FLAG)
  	{
  	    buf[0] = 'R';
  	    buf[1] = 'v';
  	}
  	else
  #endif
  	if (State & REPLACE_FLAG)
  	    buf[0] = 'R';
  	else
  	    buf[0] = 'i';
      }
      else if (State & CMDLINE)
      {
  	buf[0] = 'c';
  	if (exmode_active)
  	    buf[1] = 'v';
      }
      else if (exmode_active)
      {
  	buf[0] = 'c';
  	buf[1] = 'e';
      }
      else
      {
  	buf[0] = 'n';
  	if (finish_op)
  	    buf[1] = 'o';
      }
  
      /* Clear out the minor mode when the argument is not a non-zero number or
       * non-empty string.  */
      if (!non_zero_arg(&argvars[0]))
  	buf[1] = NUL;
  
      rettv->vval.v_string = vim_strsave(buf);
      rettv->v_type = VAR_STRING;
  }
  
  #if defined(FEAT_MZSCHEME) || defined(PROTO)
  /*
   * "mzeval()" function
   */
      static void
  f_mzeval(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*str;
      char_u	buf[NUMBUFLEN];
  
      str = get_tv_string_buf(&argvars[0], buf);
      do_mzeval(str, rettv);
  }
  
      void
  mzscheme_call_vim(name, args, rettv)
      char_u	*name;
      typval_T	*args;
      typval_T	*rettv;
  {
      typval_T argvars[3];
  
      argvars[0].v_type = VAR_STRING;
      argvars[0].vval.v_string = name;
      copy_tv(args, &argvars[1]);
      argvars[2].v_type = VAR_UNKNOWN;
      f_call(argvars, rettv);
      clear_tv(&argvars[1]);
  }
  #endif
  
  /*
   * "nextnonblank()" function
   */
      static void
  f_nextnonblank(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      linenr_T	lnum;
  
      for (lnum = get_tv_lnum(argvars); ; ++lnum)
      {
  	if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
  	{
  	    lnum = 0;
  	    break;
  	}
  	if (*skipwhite(ml_get(lnum)) != NUL)
  	    break;
      }
      rettv->vval.v_number = lnum;
  }
  
  /*
   * "nr2char()" function
   */
      static void
  f_nr2char(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	buf[NUMBUFLEN];
  
  #ifdef FEAT_MBYTE
      if (has_mbyte)
      {
  	int	utf8 = 0;
  
  	if (argvars[1].v_type != VAR_UNKNOWN)
  	    utf8 = get_tv_number_chk(&argvars[1], NULL);
  	if (utf8)
  	    buf[(*utf_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
  	else
  	    buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
      }
      else
  #endif
      {
  	buf[0] = (char_u)get_tv_number(&argvars[0]);
  	buf[1] = NUL;
      }
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = vim_strsave(buf);
  }
  
  /*
   * "or(expr, expr)" function
   */
      static void
  f_or(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = get_tv_number_chk(&argvars[0], NULL)
  					| get_tv_number_chk(&argvars[1], NULL);
  }
  
  /*
   * "pathshorten()" function
   */
      static void
  f_pathshorten(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*p;
  
      rettv->v_type = VAR_STRING;
      p = get_tv_string_chk(&argvars[0]);
      if (p == NULL)
  	rettv->vval.v_string = NULL;
      else
      {
  	p = vim_strsave(p);
  	rettv->vval.v_string = p;
  	if (p != NULL)
  	    shorten_dir(p);
      }
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "pow()" function
   */
      static void
  f_pow(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	fx, fy;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &fx) == OK
  				     && get_float_arg(&argvars[1], &fy) == OK)
  	rettv->vval.v_float = pow(fx, fy);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  /*
   * "prevnonblank()" function
   */
      static void
  f_prevnonblank(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      linenr_T	lnum;
  
      lnum = get_tv_lnum(argvars);
      if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
  	lnum = 0;
      else
  	while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
  	    --lnum;
      rettv->vval.v_number = lnum;
  }
  
  #ifdef HAVE_STDARG_H
  /* This dummy va_list is here because:
   * - passing a NULL pointer doesn't work when va_list isn't a pointer
   * - locally in the function results in a "used before set" warning
   * - using va_start() to initialize it gives "function with fixed args" error */
  static va_list	ap;
  #endif
  
  /*
   * "printf()" function
   */
      static void
  f_printf(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  #ifdef HAVE_STDARG_H	    /* only very old compilers can't do this */
      {
  	char_u	buf[NUMBUFLEN];
  	int	len;
  	char_u	*s;
  	int	saved_did_emsg = did_emsg;
  	char	*fmt;
  
  	/* Get the required length, allocate the buffer and do it for real. */
  	did_emsg = FALSE;
  	fmt = (char *)get_tv_string_buf(&argvars[0], buf);
  	len = vim_vsnprintf(NULL, 0, fmt, ap, argvars + 1);
  	if (!did_emsg)
  	{
  	    s = alloc(len + 1);
  	    if (s != NULL)
  	    {
  		rettv->vval.v_string = s;
  		(void)vim_vsnprintf((char *)s, len + 1, fmt, ap, argvars + 1);
  	    }
  	}
  	did_emsg |= saved_did_emsg;
      }
  #endif
  }
  
  /*
   * "pumvisible()" function
   */
      static void
  f_pumvisible(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_INS_EXPAND
      if (pum_visible())
  	rettv->vval.v_number = 1;
  #endif
  }
  
  #ifdef FEAT_PYTHON3
  /*
   * "py3eval()" function
   */
      static void
  f_py3eval(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*str;
      char_u	buf[NUMBUFLEN];
  
      str = get_tv_string_buf(&argvars[0], buf);
      do_py3eval(str, rettv);
  }
  #endif
  
  #ifdef FEAT_PYTHON
  /*
   * "pyeval()" function
   */
      static void
  f_pyeval(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*str;
      char_u	buf[NUMBUFLEN];
  
      str = get_tv_string_buf(&argvars[0], buf);
      do_pyeval(str, rettv);
  }
  #endif
  
  /*
   * "range()" function
   */
      static void
  f_range(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      long	start;
      long	end;
      long	stride = 1;
      long	i;
      int		error = FALSE;
  
      start = get_tv_number_chk(&argvars[0], &error);
      if (argvars[1].v_type == VAR_UNKNOWN)
      {
  	end = start - 1;
  	start = 0;
      }
      else
      {
  	end = get_tv_number_chk(&argvars[1], &error);
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	    stride = get_tv_number_chk(&argvars[2], &error);
      }
  
      if (error)
  	return;		/* type error; errmsg already given */
      if (stride == 0)
  	EMSG(_("E726: Stride is zero"));
      else if (stride > 0 ? end + 1 < start : end - 1 > start)
  	EMSG(_("E727: Start past end"));
      else
      {
  	if (rettv_list_alloc(rettv) == OK)
  	    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
  		if (list_append_number(rettv->vval.v_list,
  						      (varnumber_T)i) == FAIL)
  		    break;
      }
  }
  
  /*
   * "readfile()" function
   */
      static void
  f_readfile(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		binary = FALSE;
      int		failed = FALSE;
      char_u	*fname;
      FILE	*fd;
      char_u	buf[(IOSIZE/256)*256];	/* rounded to avoid odd + 1 */
      int		io_size = sizeof(buf);
      int		readlen;		/* size of last fread() */
      char_u	*prev	 = NULL;	/* previously read bytes, if any */
      long	prevlen  = 0;		/* length of data in prev */
      long	prevsize = 0;		/* size of prev buffer */
      long	maxline  = MAXLNUM;
      long	cnt	 = 0;
      char_u	*p;			/* position in buf */
      char_u	*start;			/* start of current line */
  
      if (argvars[1].v_type != VAR_UNKNOWN)
      {
  	if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
  	    binary = TRUE;
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	    maxline = get_tv_number(&argvars[2]);
      }
  
      if (rettv_list_alloc(rettv) == FAIL)
  	return;
  
      /* Always open the file in binary mode, library functions have a mind of
       * their own about CR-LF conversion. */
      fname = get_tv_string(&argvars[0]);
      if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
      {
  	EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
  	return;
      }
  
      while (cnt < maxline || maxline < 0)
      {
  	readlen = (int)fread(buf, 1, io_size, fd);
  
  	/* This for loop processes what was read, but is also entered at end
  	 * of file so that either:
  	 * - an incomplete line gets written
  	 * - a "binary" file gets an empty line at the end if it ends in a
  	 *   newline.  */
  	for (p = buf, start = buf;
  		p < buf + readlen || (readlen <= 0 && (prevlen > 0 || binary));
  		++p)
  	{
  	    if (*p == '\n' || readlen <= 0)
  	    {
  		listitem_T  *li;
  		char_u	    *s	= NULL;
  		long_u	    len = p - start;
  
  		/* Finished a line.  Remove CRs before NL. */
  		if (readlen > 0 && !binary)
  		{
  		    while (len > 0 && start[len - 1] == '\r')
  			--len;
  		    /* removal may cross back to the "prev" string */
  		    if (len == 0)
  			while (prevlen > 0 && prev[prevlen - 1] == '\r')
  			    --prevlen;
  		}
  		if (prevlen == 0)
  		    s = vim_strnsave(start, (int)len);
  		else
  		{
  		    /* Change "prev" buffer to be the right size.  This way
  		     * the bytes are only copied once, and very long lines are
  		     * allocated only once.  */
  		    if ((s = vim_realloc(prev, prevlen + len + 1)) != NULL)
  		    {
  			mch_memmove(s + prevlen, start, len);
  			s[prevlen + len] = NUL;
  			prev = NULL; /* the list will own the string */
  			prevlen = prevsize = 0;
  		    }
  		}
  		if (s == NULL)
  		{
  		    do_outofmem_msg((long_u) prevlen + len + 1);
  		    failed = TRUE;
  		    break;
  		}
  
  		if ((li = listitem_alloc()) == NULL)
  		{
  		    vim_free(s);
  		    failed = TRUE;
  		    break;
  		}
  		li->li_tv.v_type = VAR_STRING;
  		li->li_tv.v_lock = 0;
  		li->li_tv.vval.v_string = s;
  		list_append(rettv->vval.v_list, li);
  
  		start = p + 1; /* step over newline */
  		if ((++cnt >= maxline && maxline >= 0) || readlen <= 0)
  		    break;
  	    }
  	    else if (*p == NUL)
  		*p = '\n';
  #ifdef FEAT_MBYTE
  	    /* Check for utf8 "bom"; U+FEFF is encoded as EF BB BF.  Do this
  	     * when finding the BF and check the previous two bytes. */
  	    else if (*p == 0xbf && enc_utf8 && !binary)
  	    {
  		/* Find the two bytes before the 0xbf.	If p is at buf, or buf
  		 * + 1, these may be in the "prev" string. */
  		char_u back1 = p >= buf + 1 ? p[-1]
  				     : prevlen >= 1 ? prev[prevlen - 1] : NUL;
  		char_u back2 = p >= buf + 2 ? p[-2]
  			  : p == buf + 1 && prevlen >= 1 ? prev[prevlen - 1]
  			  : prevlen >= 2 ? prev[prevlen - 2] : NUL;
  
  		if (back2 == 0xef && back1 == 0xbb)
  		{
  		    char_u *dest = p - 2;
  
  		    /* Usually a BOM is at the beginning of a file, and so at
  		     * the beginning of a line; then we can just step over it.
  		     */
  		    if (start == dest)
  			start = p + 1;
  		    else
  		    {
  			/* have to shuffle buf to close gap */
  			int adjust_prevlen = 0;
  
  			if (dest < buf)
  			{
  			    adjust_prevlen = (int)(buf - dest); /* must be 1 or 2 */
  			    dest = buf;
  			}
  			if (readlen > p - buf + 1)
  			    mch_memmove(dest, p + 1, readlen - (p - buf) - 1);
  			readlen -= 3 - adjust_prevlen;
  			prevlen -= adjust_prevlen;
  			p = dest - 1;
  		    }
  		}
  	    }
  #endif
  	} /* for */
  
  	if (failed || (cnt >= maxline && maxline >= 0) || readlen <= 0)
  	    break;
  	if (start < p)
  	{
  	    /* There's part of a line in buf, store it in "prev". */
  	    if (p - start + prevlen >= prevsize)
  	    {
  		/* need bigger "prev" buffer */
  		char_u *newprev;
  
  		/* A common use case is ordinary text files and "prev" gets a
  		 * fragment of a line, so the first allocation is made
  		 * small, to avoid repeatedly 'allocing' large and
  		 * 'reallocing' small. */
  		if (prevsize == 0)
  		    prevsize = (long)(p - start);
  		else
  		{
  		    long grow50pc = (prevsize * 3) / 2;
  		    long growmin  = (long)((p - start) * 2 + prevlen);
  		    prevsize = grow50pc > growmin ? grow50pc : growmin;
  		}
  		newprev = prev == NULL ? alloc(prevsize)
  						: vim_realloc(prev, prevsize);
  		if (newprev == NULL)
  		{
  		    do_outofmem_msg((long_u)prevsize);
  		    failed = TRUE;
  		    break;
  		}
  		prev = newprev;
  	    }
  	    /* Add the line part to end of "prev". */
  	    mch_memmove(prev + prevlen, start, p - start);
  	    prevlen += (long)(p - start);
  	}
      } /* while */
  
      /*
       * For a negative line count use only the lines at the end of the file,
       * free the rest.
       */
      if (!failed && maxline < 0)
  	while (cnt > -maxline)
  	{
  	    listitem_remove(rettv->vval.v_list, rettv->vval.v_list->lv_first);
  	    --cnt;
  	}
  
      if (failed)
      {
  	list_free(rettv->vval.v_list, TRUE);
  	/* readfile doc says an empty list is returned on error */
  	rettv->vval.v_list = list_alloc();
      }
  
      vim_free(prev);
      fclose(fd);
  }
  
  #if defined(FEAT_RELTIME)
  static int list2proftime __ARGS((typval_T *arg, proftime_T *tm));
  
  /*
   * Convert a List to proftime_T.
   * Return FAIL when there is something wrong.
   */
      static int
  list2proftime(arg, tm)
      typval_T	*arg;
      proftime_T  *tm;
  {
      long	n1, n2;
      int	error = FALSE;
  
      if (arg->v_type != VAR_LIST || arg->vval.v_list == NULL
  					     || arg->vval.v_list->lv_len != 2)
  	return FAIL;
      n1 = list_find_nr(arg->vval.v_list, 0L, &error);
      n2 = list_find_nr(arg->vval.v_list, 1L, &error);
  # ifdef WIN3264
      tm->HighPart = n1;
      tm->LowPart = n2;
  # else
      tm->tv_sec = n1;
      tm->tv_usec = n2;
  # endif
      return error ? FAIL : OK;
  }
  #endif /* FEAT_RELTIME */
  
  /*
   * "reltime()" function
   */
      static void
  f_reltime(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_RELTIME
      proftime_T	res;
      proftime_T	start;
  
      if (argvars[0].v_type == VAR_UNKNOWN)
      {
  	/* No arguments: get current time. */
  	profile_start(&res);
      }
      else if (argvars[1].v_type == VAR_UNKNOWN)
      {
  	if (list2proftime(&argvars[0], &res) == FAIL)
  	    return;
  	profile_end(&res);
      }
      else
      {
  	/* Two arguments: compute the difference. */
  	if (list2proftime(&argvars[0], &start) == FAIL
  		|| list2proftime(&argvars[1], &res) == FAIL)
  	    return;
  	profile_sub(&res, &start);
      }
  
      if (rettv_list_alloc(rettv) == OK)
      {
  	long	n1, n2;
  
  # ifdef WIN3264
  	n1 = res.HighPart;
  	n2 = res.LowPart;
  # else
  	n1 = res.tv_sec;
  	n2 = res.tv_usec;
  # endif
  	list_append_number(rettv->vval.v_list, (varnumber_T)n1);
  	list_append_number(rettv->vval.v_list, (varnumber_T)n2);
      }
  #endif
  }
  
  /*
   * "reltimestr()" function
   */
      static void
  f_reltimestr(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_RELTIME
      proftime_T	tm;
  #endif
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  #ifdef FEAT_RELTIME
      if (list2proftime(&argvars[0], &tm) == OK)
  	rettv->vval.v_string = vim_strsave((char_u *)profile_msg(&tm));
  #endif
  }
  
  #if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
  static void make_connection __ARGS((void));
  static int check_connection __ARGS((void));
  
      static void
  make_connection()
  {
      if (X_DISPLAY == NULL
  # ifdef FEAT_GUI
  	    && !gui.in_use
  # endif
  	    )
      {
  	x_force_connect = TRUE;
  	setup_term_clip();
  	x_force_connect = FALSE;
      }
  }
  
      static int
  check_connection()
  {
      make_connection();
      if (X_DISPLAY == NULL)
      {
  	EMSG(_("E240: No connection to Vim server"));
  	return FAIL;
      }
      return OK;
  }
  #endif
  
  #ifdef FEAT_CLIENTSERVER
  static void remote_common __ARGS((typval_T *argvars, typval_T *rettv, int expr));
  
      static void
  remote_common(argvars, rettv, expr)
      typval_T	*argvars;
      typval_T	*rettv;
      int		expr;
  {
      char_u	*server_name;
      char_u	*keys;
      char_u	*r = NULL;
      char_u	buf[NUMBUFLEN];
  # ifdef WIN32
      HWND	w;
  # else
      Window	w;
  # endif
  
      if (check_restricted() || check_secure())
  	return;
  
  # ifdef FEAT_X11
      if (check_connection() == FAIL)
  	return;
  # endif
  
      server_name = get_tv_string_chk(&argvars[0]);
      if (server_name == NULL)
  	return;		/* type error; errmsg already given */
      keys = get_tv_string_buf(&argvars[1], buf);
  # ifdef WIN32
      if (serverSendToVim(server_name, keys, &r, &w, expr, TRUE) < 0)
  # else
      if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, 0, TRUE)
  									  < 0)
  # endif
      {
  	if (r != NULL)
  	    EMSG(r);		/* sending worked but evaluation failed */
  	else
  	    EMSG2(_("E241: Unable to send to %s"), server_name);
  	return;
      }
  
      rettv->vval.v_string = r;
  
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	dictitem_T	v;
  	char_u		str[30];
  	char_u		*idvar;
  
  	sprintf((char *)str, PRINTF_HEX_LONG_U, (long_u)w);
  	v.di_tv.v_type = VAR_STRING;
  	v.di_tv.vval.v_string = vim_strsave(str);
  	idvar = get_tv_string_chk(&argvars[2]);
  	if (idvar != NULL)
  	    set_var(idvar, &v.di_tv, FALSE);
  	vim_free(v.di_tv.vval.v_string);
      }
  }
  #endif
  
  /*
   * "remote_expr()" function
   */
      static void
  f_remote_expr(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  #ifdef FEAT_CLIENTSERVER
      remote_common(argvars, rettv, TRUE);
  #endif
  }
  
  /*
   * "remote_foreground()" function
   */
      static void
  f_remote_foreground(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_CLIENTSERVER
  # ifdef WIN32
      /* On Win32 it's done in this application. */
      {
  	char_u	*server_name = get_tv_string_chk(&argvars[0]);
  
  	if (server_name != NULL)
  	    serverForeground(server_name);
      }
  # else
      /* Send a foreground() expression to the server. */
      argvars[1].v_type = VAR_STRING;
      argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
      argvars[2].v_type = VAR_UNKNOWN;
      remote_common(argvars, rettv, TRUE);
      vim_free(argvars[1].vval.v_string);
  # endif
  #endif
  }
  
      static void
  f_remote_peek(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_CLIENTSERVER
      dictitem_T	v;
      char_u	*s = NULL;
  # ifdef WIN32
      long_u	n = 0;
  # endif
      char_u	*serverid;
  
      if (check_restricted() || check_secure())
      {
  	rettv->vval.v_number = -1;
  	return;
      }
      serverid = get_tv_string_chk(&argvars[0]);
      if (serverid == NULL)
      {
  	rettv->vval.v_number = -1;
  	return;		/* type error; errmsg already given */
      }
  # ifdef WIN32
      sscanf(serverid, SCANF_HEX_LONG_U, &n);
      if (n == 0)
  	rettv->vval.v_number = -1;
      else
      {
  	s = serverGetReply((HWND)n, FALSE, FALSE, FALSE);
  	rettv->vval.v_number = (s != NULL);
      }
  # else
      if (check_connection() == FAIL)
  	return;
  
      rettv->vval.v_number = serverPeekReply(X_DISPLAY,
  						serverStrToWin(serverid), &s);
  # endif
  
      if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
      {
  	char_u		*retvar;
  
  	v.di_tv.v_type = VAR_STRING;
  	v.di_tv.vval.v_string = vim_strsave(s);
  	retvar = get_tv_string_chk(&argvars[1]);
  	if (retvar != NULL)
  	    set_var(retvar, &v.di_tv, FALSE);
  	vim_free(v.di_tv.vval.v_string);
      }
  #else
      rettv->vval.v_number = -1;
  #endif
  }
  
      static void
  f_remote_read(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      char_u	*r = NULL;
  
  #ifdef FEAT_CLIENTSERVER
      char_u	*serverid = get_tv_string_chk(&argvars[0]);
  
      if (serverid != NULL && !check_restricted() && !check_secure())
      {
  # ifdef WIN32
  	/* The server's HWND is encoded in the 'id' parameter */
  	long_u		n = 0;
  
  	sscanf(serverid, SCANF_HEX_LONG_U, &n);
  	if (n != 0)
  	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE);
  	if (r == NULL)
  # else
  	if (check_connection() == FAIL || serverReadReply(X_DISPLAY,
  		serverStrToWin(serverid), &r, FALSE) < 0)
  # endif
  	    EMSG(_("E277: Unable to read a server reply"));
      }
  #endif
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = r;
  }
  
  /*
   * "remote_send()" function
   */
      static void
  f_remote_send(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
  #ifdef FEAT_CLIENTSERVER
      remote_common(argvars, rettv, FALSE);
  #endif
  }
  
  /*
   * "remove()" function
   */
      static void
  f_remove(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      list_T	*l;
      listitem_T	*item, *item2;
      listitem_T	*li;
      long	idx;
      long	end;
      char_u	*key;
      dict_T	*d;
      dictitem_T	*di;
      char_u	*arg_errmsg = (char_u *)N_("remove() argument");
  
      if (argvars[0].v_type == VAR_DICT)
      {
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	    EMSG2(_(e_toomanyarg), "remove()");
  	else if ((d = argvars[0].vval.v_dict) != NULL
  		&& !tv_check_lock(d->dv_lock, arg_errmsg, TRUE))
  	{
  	    key = get_tv_string_chk(&argvars[1]);
  	    if (key != NULL)
  	    {
  		di = dict_find(d, key, -1);
  		if (di == NULL)
  		    EMSG2(_(e_dictkey), key);
  		else if (!var_check_fixed(di->di_flags, arg_errmsg, TRUE)
  			    && !var_check_ro(di->di_flags, arg_errmsg, TRUE))
  		{
  		    *rettv = di->di_tv;
  		    init_tv(&di->di_tv);
  		    dictitem_remove(d, di);
  		}
  	    }
  	}
      }
      else if (argvars[0].v_type != VAR_LIST)
  	EMSG2(_(e_listdictarg), "remove()");
      else if ((l = argvars[0].vval.v_list) != NULL
  	    && !tv_check_lock(l->lv_lock, arg_errmsg, TRUE))
      {
  	int	    error = FALSE;
  
  	idx = get_tv_number_chk(&argvars[1], &error);
  	if (error)
  	    ;		/* type error: do nothing, errmsg already given */
  	else if ((item = list_find(l, idx)) == NULL)
  	    EMSGN(_(e_listidx), idx);
  	else
  	{
  	    if (argvars[2].v_type == VAR_UNKNOWN)
  	    {
  		/* Remove one item, return its value. */
  		vimlist_remove(l, item, item);
  		*rettv = item->li_tv;
  		vim_free(item);
  	    }
  	    else
  	    {
  		/* Remove range of items, return list with values. */
  		end = get_tv_number_chk(&argvars[2], &error);
  		if (error)
  		    ;		/* type error: do nothing */
  		else if ((item2 = list_find(l, end)) == NULL)
  		    EMSGN(_(e_listidx), end);
  		else
  		{
  		    int	    cnt = 0;
  
  		    for (li = item; li != NULL; li = li->li_next)
  		    {
  			++cnt;
  			if (li == item2)
  			    break;
  		    }
  		    if (li == NULL)  /* didn't find "item2" after "item" */
  			EMSG(_(e_invrange));
  		    else
  		    {
  			vimlist_remove(l, item, item2);
  			if (rettv_list_alloc(rettv) == OK)
  			{
  			    l = rettv->vval.v_list;
  			    l->lv_first = item;
  			    l->lv_last = item2;
  			    item->li_prev = NULL;
  			    item2->li_next = NULL;
  			    l->lv_len = cnt;
  			}
  		    }
  		}
  	    }
  	}
      }
  }
  
  /*
   * "rename({from}, {to})" function
   */
      static void
  f_rename(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	buf[NUMBUFLEN];
  
      if (check_restricted() || check_secure())
  	rettv->vval.v_number = -1;
      else
  	rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
  				      get_tv_string_buf(&argvars[1], buf));
  }
  
  /*
   * "repeat()" function
   */
      static void
  f_repeat(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*p;
      int		n;
      int		slen;
      int		len;
      char_u	*r;
      int		i;
  
      n = get_tv_number(&argvars[1]);
      if (argvars[0].v_type == VAR_LIST)
      {
  	if (rettv_list_alloc(rettv) == OK && argvars[0].vval.v_list != NULL)
  	    while (n-- > 0)
  		if (list_extend(rettv->vval.v_list,
  					argvars[0].vval.v_list, NULL) == FAIL)
  		    break;
      }
      else
      {
  	p = get_tv_string(&argvars[0]);
  	rettv->v_type = VAR_STRING;
  	rettv->vval.v_string = NULL;
  
  	slen = (int)STRLEN(p);
  	len = slen * n;
  	if (len <= 0)
  	    return;
  
  	r = alloc(len + 1);
  	if (r != NULL)
  	{
  	    for (i = 0; i < n; i++)
  		mch_memmove(r + i * slen, p, (size_t)slen);
  	    r[len] = NUL;
  	}
  
  	rettv->vval.v_string = r;
      }
  }
  
  /*
   * "resolve()" function
   */
      static void
  f_resolve(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*p;
  #ifdef HAVE_READLINK
      char_u	*buf = NULL;
  #endif
  
      p = get_tv_string(&argvars[0]);
  #ifdef FEAT_SHORTCUT
      {
  	char_u	*v = NULL;
  
  	v = mch_resolve_shortcut(p);
  	if (v != NULL)
  	    rettv->vval.v_string = v;
  	else
  	    rettv->vval.v_string = vim_strsave(p);
      }
  #else
  # ifdef HAVE_READLINK
      {
  	char_u	*cpy;
  	int	len;
  	char_u	*remain = NULL;
  	char_u	*q;
  	int	is_relative_to_current = FALSE;
  	int	has_trailing_pathsep = FALSE;
  	int	limit = 100;
  
  	p = vim_strsave(p);
  
  	if (p[0] == '.' && (vim_ispathsep(p[1])
  				   || (p[1] == '.' && (vim_ispathsep(p[2])))))
  	    is_relative_to_current = TRUE;
  
  	len = STRLEN(p);
  	if (len > 0 && after_pathsep(p, p + len))
  	{
  	    has_trailing_pathsep = TRUE;
  	    p[len - 1] = NUL; /* the trailing slash breaks readlink() */
  	}
  
  	q = getnextcomp(p);
  	if (*q != NUL)
  	{
  	    /* Separate the first path component in "p", and keep the
  	     * remainder (beginning with the path separator). */
  	    remain = vim_strsave(q - 1);
  	    q[-1] = NUL;
  	}
  
  	buf = alloc(MAXPATHL + 1);
  	if (buf == NULL)
  	    goto fail;
  
  	for (;;)
  	{
  	    for (;;)
  	    {
  		len = readlink((char *)p, (char *)buf, MAXPATHL);
  		if (len <= 0)
  		    break;
  		buf[len] = NUL;
  
  		if (limit-- == 0)
  		{
  		    vim_free(p);
  		    vim_free(remain);
  		    EMSG(_("E655: Too many symbolic links (cycle?)"));
  		    rettv->vval.v_string = NULL;
  		    goto fail;
  		}
  
  		/* Ensure that the result will have a trailing path separator
  		 * if the argument has one. */
  		if (remain == NULL && has_trailing_pathsep)
  		    add_pathsep(buf);
  
  		/* Separate the first path component in the link value and
  		 * concatenate the remainders. */
  		q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
  		if (*q != NUL)
  		{
  		    if (remain == NULL)
  			remain = vim_strsave(q - 1);
  		    else
  		    {
  			cpy = concat_str(q - 1, remain);
  			if (cpy != NULL)
  			{
  			    vim_free(remain);
  			    remain = cpy;
  			}
  		    }
  		    q[-1] = NUL;
  		}
  
  		q = gettail(p);
  		if (q > p && *q == NUL)
  		{
  		    /* Ignore trailing path separator. */
  		    q[-1] = NUL;
  		    q = gettail(p);
  		}
  		if (q > p && !mch_isFullName(buf))
  		{
  		    /* symlink is relative to directory of argument */
  		    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
  		    if (cpy != NULL)
  		    {
  			STRCPY(cpy, p);
  			STRCPY(gettail(cpy), buf);
  			vim_free(p);
  			p = cpy;
  		    }
  		}
  		else
  		{
  		    vim_free(p);
  		    p = vim_strsave(buf);
  		}
  	    }
  
  	    if (remain == NULL)
  		break;
  
  	    /* Append the first path component of "remain" to "p". */
  	    q = getnextcomp(remain + 1);
  	    len = q - remain - (*q != NUL);
  	    cpy = vim_strnsave(p, STRLEN(p) + len);
  	    if (cpy != NULL)
  	    {
  		STRNCAT(cpy, remain, len);
  		vim_free(p);
  		p = cpy;
  	    }
  	    /* Shorten "remain". */
  	    if (*q != NUL)
  		STRMOVE(remain, q - 1);
  	    else
  	    {
  		vim_free(remain);
  		remain = NULL;
  	    }
  	}
  
  	/* If the result is a relative path name, make it explicitly relative to
  	 * the current directory if and only if the argument had this form. */
  	if (!vim_ispathsep(*p))
  	{
  	    if (is_relative_to_current
  		    && *p != NUL
  		    && !(p[0] == '.'
  			&& (p[1] == NUL
  			    || vim_ispathsep(p[1])
  			    || (p[1] == '.'
  				&& (p[2] == NUL
  				    || vim_ispathsep(p[2]))))))
  	    {
  		/* Prepend "./". */
  		cpy = concat_str((char_u *)"./", p);
  		if (cpy != NULL)
  		{
  		    vim_free(p);
  		    p = cpy;
  		}
  	    }
  	    else if (!is_relative_to_current)
  	    {
  		/* Strip leading "./". */
  		q = p;
  		while (q[0] == '.' && vim_ispathsep(q[1]))
  		    q += 2;
  		if (q > p)
  		    STRMOVE(p, p + 2);
  	    }
  	}
  
  	/* Ensure that the result will have no trailing path separator
  	 * if the argument had none.  But keep "/" or "//". */
  	if (!has_trailing_pathsep)
  	{
  	    q = p + STRLEN(p);
  	    if (after_pathsep(p, q))
  		*gettail_sep(p) = NUL;
  	}
  
  	rettv->vval.v_string = p;
      }
  # else
      rettv->vval.v_string = vim_strsave(p);
  # endif
  #endif
  
      simplify_filename(rettv->vval.v_string);
  
  #ifdef HAVE_READLINK
  fail:
      vim_free(buf);
  #endif
      rettv->v_type = VAR_STRING;
  }
  
  /*
   * "reverse({list})" function
   */
      static void
  f_reverse(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      list_T	*l;
      listitem_T	*li, *ni;
  
      if (argvars[0].v_type != VAR_LIST)
  	EMSG2(_(e_listarg), "reverse()");
      else if ((l = argvars[0].vval.v_list) != NULL
  	    && !tv_check_lock(l->lv_lock,
  				    (char_u *)N_("reverse() argument"), TRUE))
      {
  	li = l->lv_last;
  	l->lv_first = l->lv_last = NULL;
  	l->lv_len = 0;
  	while (li != NULL)
  	{
  	    ni = li->li_prev;
  	    list_append(l, li);
  	    li = ni;
  	}
  	rettv->vval.v_list = l;
  	rettv->v_type = VAR_LIST;
  	++l->lv_refcount;
  	l->lv_idx = l->lv_len - l->lv_idx - 1;
      }
  }
  
  #define SP_NOMOVE	0x01	    /* don't move cursor */
  #define SP_REPEAT	0x02	    /* repeat to find outer pair */
  #define SP_RETCOUNT	0x04	    /* return matchcount */
  #define SP_SETPCMARK	0x08	    /* set previous context mark */
  #define SP_START	0x10	    /* accept match at start position */
  #define SP_SUBPAT	0x20	    /* return nr of matching sub-pattern */
  #define SP_END		0x40	    /* leave cursor at end of match */
  
  static int get_search_arg __ARGS((typval_T *varp, int *flagsp));
  
  /*
   * Get flags for a search function.
   * Possibly sets "p_ws".
   * Returns BACKWARD, FORWARD or zero (for an error).
   */
      static int
  get_search_arg(varp, flagsp)
      typval_T	*varp;
      int		*flagsp;
  {
      int		dir = FORWARD;
      char_u	*flags;
      char_u	nbuf[NUMBUFLEN];
      int		mask;
  
      if (varp->v_type != VAR_UNKNOWN)
      {
  	flags = get_tv_string_buf_chk(varp, nbuf);
  	if (flags == NULL)
  	    return 0;		/* type error; errmsg already given */
  	while (*flags != NUL)
  	{
  	    switch (*flags)
  	    {
  		case 'b': dir = BACKWARD; break;
  		case 'w': p_ws = TRUE; break;
  		case 'W': p_ws = FALSE; break;
  		default:  mask = 0;
  			  if (flagsp != NULL)
  			     switch (*flags)
  			     {
  				 case 'c': mask = SP_START; break;
  				 case 'e': mask = SP_END; break;
  				 case 'm': mask = SP_RETCOUNT; break;
  				 case 'n': mask = SP_NOMOVE; break;
  				 case 'p': mask = SP_SUBPAT; break;
  				 case 'r': mask = SP_REPEAT; break;
  				 case 's': mask = SP_SETPCMARK; break;
  			     }
  			  if (mask == 0)
  			  {
  			      EMSG2(_(e_invarg2), flags);
  			      dir = 0;
  			  }
  			  else
  			      *flagsp |= mask;
  	    }
  	    if (dir == 0)
  		break;
  	    ++flags;
  	}
      }
      return dir;
  }
  
  /*
   * Shared by search() and searchpos() functions
   */
      static int
  search_cmn(argvars, match_pos, flagsp)
      typval_T	*argvars;
      pos_T	*match_pos;
      int		*flagsp;
  {
      int		flags;
      char_u	*pat;
      pos_T	pos;
      pos_T	save_cursor;
      int		save_p_ws = p_ws;
      int		dir;
      int		retval = 0;	/* default: FAIL */
      long	lnum_stop = 0;
      proftime_T	tm;
  #ifdef FEAT_RELTIME
      long	time_limit = 0;
  #endif
      int		options = SEARCH_KEEP;
      int		subpatnum;
  
      pat = get_tv_string(&argvars[0]);
      dir = get_search_arg(&argvars[1], flagsp);	/* may set p_ws */
      if (dir == 0)
  	goto theend;
      flags = *flagsp;
      if (flags & SP_START)
  	options |= SEARCH_START;
      if (flags & SP_END)
  	options |= SEARCH_END;
  
      /* Optional arguments: line number to stop searching and timeout. */
      if (argvars[1].v_type != VAR_UNKNOWN && argvars[2].v_type != VAR_UNKNOWN)
      {
  	lnum_stop = get_tv_number_chk(&argvars[2], NULL);
  	if (lnum_stop < 0)
  	    goto theend;
  #ifdef FEAT_RELTIME
  	if (argvars[3].v_type != VAR_UNKNOWN)
  	{
  	    time_limit = get_tv_number_chk(&argvars[3], NULL);
  	    if (time_limit < 0)
  		goto theend;
  	}
  #endif
      }
  
  #ifdef FEAT_RELTIME
      /* Set the time limit, if there is one. */
      profile_setlimit(time_limit, &tm);
  #endif
  
      /*
       * This function does not accept SP_REPEAT and SP_RETCOUNT flags.
       * Check to make sure only those flags are set.
       * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
       * flags cannot be set. Check for that condition also.
       */
      if (((flags & (SP_REPEAT | SP_RETCOUNT)) != 0)
  	    || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
      {
  	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
  	goto theend;
      }
  
      pos = save_cursor = curwin->w_cursor;
      subpatnum = searchit(curwin, curbuf, &pos, dir, pat, 1L,
  				options, RE_SEARCH, (linenr_T)lnum_stop, &tm);
      if (subpatnum != FAIL)
      {
  	if (flags & SP_SUBPAT)
  	    retval = subpatnum;
  	else
  	    retval = pos.lnum;
  	if (flags & SP_SETPCMARK)
  	    setpcmark();
  	curwin->w_cursor = pos;
  	if (match_pos != NULL)
  	{
  	    /* Store the match cursor position */
  	    match_pos->lnum = pos.lnum;
  	    match_pos->col = pos.col + 1;
  	}
  	/* "/$" will put the cursor after the end of the line, may need to
  	 * correct that here */
  	check_cursor();
      }
  
      /* If 'n' flag is used: restore cursor position. */
      if (flags & SP_NOMOVE)
  	curwin->w_cursor = save_cursor;
      else
  	curwin->w_set_curswant = TRUE;
  theend:
      p_ws = save_p_ws;
  
      return retval;
  }
  
  #ifdef FEAT_FLOAT
  
  /*
   * round() is not in C90, use ceil() or floor() instead.
   */
      float_T
  vim_round(f)
      float_T f;
  {
      return f > 0 ? floor(f + 0.5) : ceil(f - 0.5);
  }
  
  /*
   * "round({float})" function
   */
      static void
  f_round(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = vim_round(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  /*
   * "screenattr()" function
   */
      static void
  f_screenattr(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      int		row;
      int		col;
      int		c;
  
      row = get_tv_number_chk(&argvars[0], NULL) - 1;
      col = get_tv_number_chk(&argvars[1], NULL) - 1;
      if (row < 0 || row >= screen_Rows
  	    || col < 0 || col >= screen_Columns)
  	c = -1;
      else
  	c = ScreenAttrs[LineOffset[row] + col];
      rettv->vval.v_number = c;
  }
  
  /*
   * "screenchar()" function
   */
      static void
  f_screenchar(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      int		row;
      int		col;
      int		off;
      int		c;
  
      row = get_tv_number_chk(&argvars[0], NULL) - 1;
      col = get_tv_number_chk(&argvars[1], NULL) - 1;
      if (row < 0 || row >= screen_Rows
  	    || col < 0 || col >= screen_Columns)
  	c = -1;
      else
      {
  	off = LineOffset[row] + col;
  #ifdef FEAT_MBYTE
  	if (enc_utf8 && ScreenLinesUC[off] != 0)
  	    c = ScreenLinesUC[off];
  	else
  #endif
  	    c = ScreenLines[off];
      }
      rettv->vval.v_number = c;
  }
  
  /*
   * "screencol()" function
   *
   * First column is 1 to be consistent with virtcol().
   */
      static void
  f_screencol(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = screen_screencol() + 1;
  }
  
  /*
   * "screenrow()" function
   */
      static void
  f_screenrow(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = screen_screenrow() + 1;
  }
  
  /*
   * "search()" function
   */
      static void
  f_search(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		flags = 0;
  
      rettv->vval.v_number = search_cmn(argvars, NULL, &flags);
  }
  
  /*
   * "searchdecl()" function
   */
      static void
  f_searchdecl(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		locally = 1;
      int		thisblock = 0;
      int		error = FALSE;
      char_u	*name;
  
      rettv->vval.v_number = 1;	/* default: FAIL */
  
      name = get_tv_string_chk(&argvars[0]);
      if (argvars[1].v_type != VAR_UNKNOWN)
      {
  	locally = get_tv_number_chk(&argvars[1], &error) == 0;
  	if (!error && argvars[2].v_type != VAR_UNKNOWN)
  	    thisblock = get_tv_number_chk(&argvars[2], &error) != 0;
      }
      if (!error && name != NULL)
  	rettv->vval.v_number = find_decl(name, (int)STRLEN(name),
  				     locally, thisblock, SEARCH_KEEP) == FAIL;
  }
  
  /*
   * Used by searchpair() and searchpairpos()
   */
      static int
  searchpair_cmn(argvars, match_pos)
      typval_T	*argvars;
      pos_T	*match_pos;
  {
      char_u	*spat, *mpat, *epat;
      char_u	*skip;
      int		save_p_ws = p_ws;
      int		dir;
      int		flags = 0;
      char_u	nbuf1[NUMBUFLEN];
      char_u	nbuf2[NUMBUFLEN];
      char_u	nbuf3[NUMBUFLEN];
      int		retval = 0;		/* default: FAIL */
      long	lnum_stop = 0;
      long	time_limit = 0;
  
      /* Get the three pattern arguments: start, middle, end. */
      spat = get_tv_string_chk(&argvars[0]);
      mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
      epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
      if (spat == NULL || mpat == NULL || epat == NULL)
  	goto theend;	    /* type error */
  
      /* Handle the optional fourth argument: flags */
      dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
      if (dir == 0)
  	goto theend;
  
      /* Don't accept SP_END or SP_SUBPAT.
       * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
       */
      if ((flags & (SP_END | SP_SUBPAT)) != 0
  	    || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
      {
  	EMSG2(_(e_invarg2), get_tv_string(&argvars[3]));
  	goto theend;
      }
  
      /* Using 'r' implies 'W', otherwise it doesn't work. */
      if (flags & SP_REPEAT)
  	p_ws = FALSE;
  
      /* Optional fifth argument: skip expression */
      if (argvars[3].v_type == VAR_UNKNOWN
  	    || argvars[4].v_type == VAR_UNKNOWN)
  	skip = (char_u *)"";
      else
      {
  	skip = get_tv_string_buf_chk(&argvars[4], nbuf3);
  	if (argvars[5].v_type != VAR_UNKNOWN)
  	{
  	    lnum_stop = get_tv_number_chk(&argvars[5], NULL);
  	    if (lnum_stop < 0)
  		goto theend;
  #ifdef FEAT_RELTIME
  	    if (argvars[6].v_type != VAR_UNKNOWN)
  	    {
  		time_limit = get_tv_number_chk(&argvars[6], NULL);
  		if (time_limit < 0)
  		    goto theend;
  	    }
  #endif
  	}
      }
      if (skip == NULL)
  	goto theend;	    /* type error */
  
      retval = do_searchpair(spat, mpat, epat, dir, skip, flags,
  					    match_pos, lnum_stop, time_limit);
  
  theend:
      p_ws = save_p_ws;
  
      return retval;
  }
  
  /*
   * "searchpair()" function
   */
      static void
  f_searchpair(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = searchpair_cmn(argvars, NULL);
  }
  
  /*
   * "searchpairpos()" function
   */
      static void
  f_searchpairpos(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      pos_T	match_pos;
      int		lnum = 0;
      int		col = 0;
  
      if (rettv_list_alloc(rettv) == FAIL)
  	return;
  
      if (searchpair_cmn(argvars, &match_pos) > 0)
      {
  	lnum = match_pos.lnum;
  	col = match_pos.col;
      }
  
      list_append_number(rettv->vval.v_list, (varnumber_T)lnum);
      list_append_number(rettv->vval.v_list, (varnumber_T)col);
  }
  
  /*
   * Search for a start/middle/end thing.
   * Used by searchpair(), see its documentation for the details.
   * Returns 0 or -1 for no match,
   */
      long
  do_searchpair(spat, mpat, epat, dir, skip, flags, match_pos,
  							lnum_stop, time_limit)
      char_u	*spat;	    /* start pattern */
      char_u	*mpat;	    /* middle pattern */
      char_u	*epat;	    /* end pattern */
      int		dir;	    /* BACKWARD or FORWARD */
      char_u	*skip;	    /* skip expression */
      int		flags;	    /* SP_SETPCMARK and other SP_ values */
      pos_T	*match_pos;
      linenr_T	lnum_stop;  /* stop at this line if not zero */
      long	time_limit UNUSED; /* stop after this many msec */
  {
      char_u	*save_cpo;
      char_u	*pat, *pat2 = NULL, *pat3 = NULL;
      long	retval = 0;
      pos_T	pos;
      pos_T	firstpos;
      pos_T	foundpos;
      pos_T	save_cursor;
      pos_T	save_pos;
      int		n;
      int		r;
      int		nest = 1;
      int		err;
      int		options = SEARCH_KEEP;
      proftime_T	tm;
  
      /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
      save_cpo = p_cpo;
      p_cpo = empty_option;
  
  #ifdef FEAT_RELTIME
      /* Set the time limit, if there is one. */
      profile_setlimit(time_limit, &tm);
  #endif
  
      /* Make two search patterns: start/end (pat2, for in nested pairs) and
       * start/middle/end (pat3, for the top pair). */
      pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 15));
      pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 23));
      if (pat2 == NULL || pat3 == NULL)
  	goto theend;
      sprintf((char *)pat2, "\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
      if (*mpat == NUL)
  	STRCPY(pat3, pat2);
      else
  	sprintf((char *)pat3, "\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
  							    spat, epat, mpat);
      if (flags & SP_START)
  	options |= SEARCH_START;
  
      save_cursor = curwin->w_cursor;
      pos = curwin->w_cursor;
      clearpos(&firstpos);
      clearpos(&foundpos);
      pat = pat3;
      for (;;)
      {
  	n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
  					   options, RE_SEARCH, lnum_stop, &tm);
  	if (n == FAIL || (firstpos.lnum != 0 && equalpos(pos, firstpos)))
  	    /* didn't find it or found the first match again: FAIL */
  	    break;
  
  	if (firstpos.lnum == 0)
  	    firstpos = pos;
  	if (equalpos(pos, foundpos))
  	{
  	    /* Found the same position again.  Can happen with a pattern that
  	     * has "\zs" at the end and searching backwards.  Advance one
  	     * character and try again. */
  	    if (dir == BACKWARD)
  		decl(&pos);
  	    else
  		incl(&pos);
  	}
  	foundpos = pos;
  
  	/* clear the start flag to avoid getting stuck here */
  	options &= ~SEARCH_START;
  
  	/* If the skip pattern matches, ignore this match. */
  	if (*skip != NUL)
  	{
  	    save_pos = curwin->w_cursor;
  	    curwin->w_cursor = pos;
  	    r = eval_to_bool(skip, &err, NULL, FALSE);
  	    curwin->w_cursor = save_pos;
  	    if (err)
  	    {
  		/* Evaluating {skip} caused an error, break here. */
  		curwin->w_cursor = save_cursor;
  		retval = -1;
  		break;
  	    }
  	    if (r)
  		continue;
  	}
  
  	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
  	{
  	    /* Found end when searching backwards or start when searching
  	     * forward: nested pair. */
  	    ++nest;
  	    pat = pat2;		/* nested, don't search for middle */
  	}
  	else
  	{
  	    /* Found end when searching forward or start when searching
  	     * backward: end of (nested) pair; or found middle in outer pair. */
  	    if (--nest == 1)
  		pat = pat3;	/* outer level, search for middle */
  	}
  
  	if (nest == 0)
  	{
  	    /* Found the match: return matchcount or line number. */
  	    if (flags & SP_RETCOUNT)
  		++retval;
  	    else
  		retval = pos.lnum;
  	    if (flags & SP_SETPCMARK)
  		setpcmark();
  	    curwin->w_cursor = pos;
  	    if (!(flags & SP_REPEAT))
  		break;
  	    nest = 1;	    /* search for next unmatched */
  	}
      }
  
      if (match_pos != NULL)
      {
  	/* Store the match cursor position */
  	match_pos->lnum = curwin->w_cursor.lnum;
  	match_pos->col = curwin->w_cursor.col + 1;
      }
  
      /* If 'n' flag is used or search failed: restore cursor position. */
      if ((flags & SP_NOMOVE) || retval == 0)
  	curwin->w_cursor = save_cursor;
  
  theend:
      vim_free(pat2);
      vim_free(pat3);
      if (p_cpo == empty_option)
  	p_cpo = save_cpo;
      else
  	/* Darn, evaluating the {skip} expression changed the value. */
  	free_string_option(save_cpo);
  
      return retval;
  }
  
  /*
   * "searchpos()" function
   */
      static void
  f_searchpos(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      pos_T	match_pos;
      int		lnum = 0;
      int		col = 0;
      int		n;
      int		flags = 0;
  
      if (rettv_list_alloc(rettv) == FAIL)
  	return;
  
      n = search_cmn(argvars, &match_pos, &flags);
      if (n > 0)
      {
  	lnum = match_pos.lnum;
  	col = match_pos.col;
      }
  
      list_append_number(rettv->vval.v_list, (varnumber_T)lnum);
      list_append_number(rettv->vval.v_list, (varnumber_T)col);
      if (flags & SP_SUBPAT)
  	list_append_number(rettv->vval.v_list, (varnumber_T)n);
  }
  
  
      static void
  f_server2client(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_CLIENTSERVER
      char_u	buf[NUMBUFLEN];
      char_u	*server = get_tv_string_chk(&argvars[0]);
      char_u	*reply = get_tv_string_buf_chk(&argvars[1], buf);
  
      rettv->vval.v_number = -1;
      if (server == NULL || reply == NULL)
  	return;
      if (check_restricted() || check_secure())
  	return;
  # ifdef FEAT_X11
      if (check_connection() == FAIL)
  	return;
  # endif
  
      if (serverSendReply(server, reply) < 0)
      {
  	EMSG(_("E258: Unable to send to client"));
  	return;
      }
      rettv->vval.v_number = 0;
  #else
      rettv->vval.v_number = -1;
  #endif
  }
  
      static void
  f_serverlist(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      char_u	*r = NULL;
  
  #ifdef FEAT_CLIENTSERVER
  # ifdef WIN32
      r = serverGetVimNames();
  # else
      make_connection();
      if (X_DISPLAY != NULL)
  	r = serverGetVimNames(X_DISPLAY);
  # endif
  #endif
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = r;
  }
  
  /*
   * "setbufvar()" function
   */
      static void
  f_setbufvar(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv UNUSED;
  {
      buf_T	*buf;
      aco_save_T	aco;
      char_u	*varname, *bufvarname;
      typval_T	*varp;
      char_u	nbuf[NUMBUFLEN];
  
      if (check_restricted() || check_secure())
  	return;
      (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
      varname = get_tv_string_chk(&argvars[1]);
      buf = get_buf_tv(&argvars[0], FALSE);
      varp = &argvars[2];
  
      if (buf != NULL && varname != NULL && varp != NULL)
      {
  	/* set curbuf to be our buf, temporarily */
  	aucmd_prepbuf(&aco, buf);
  
  	if (*varname == '&')
  	{
  	    long	numval;
  	    char_u	*strval;
  	    int		error = FALSE;
  
  	    ++varname;
  	    numval = get_tv_number_chk(varp, &error);
  	    strval = get_tv_string_buf_chk(varp, nbuf);
  	    if (!error && strval != NULL)
  		set_option_value(varname, numval, strval, OPT_LOCAL);
  	}
  	else
  	{
  	    bufvarname = alloc((unsigned)STRLEN(varname) + 3);
  	    if (bufvarname != NULL)
  	    {
  		STRCPY(bufvarname, "b:");
  		STRCPY(bufvarname + 2, varname);
  		set_var(bufvarname, varp, TRUE);
  		vim_free(bufvarname);
  	    }
  	}
  
  	/* reset notion of buffer */
  	aucmd_restbuf(&aco);
      }
  }
  
  /*
   * "setcmdpos()" function
   */
      static void
  f_setcmdpos(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		pos = (int)get_tv_number(&argvars[0]) - 1;
  
      if (pos >= 0)
  	rettv->vval.v_number = set_cmdline_pos(pos);
  }
  
  /*
   * "setline()" function
   */
      static void
  f_setline(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      linenr_T	lnum;
      char_u	*line = NULL;
      list_T	*l = NULL;
      listitem_T	*li = NULL;
      long	added = 0;
      linenr_T	lcount = curbuf->b_ml.ml_line_count;
  
      lnum = get_tv_lnum(&argvars[0]);
      if (argvars[1].v_type == VAR_LIST)
      {
  	l = argvars[1].vval.v_list;
  	li = l->lv_first;
      }
      else
  	line = get_tv_string_chk(&argvars[1]);
  
      /* default result is zero == OK */
      for (;;)
      {
  	if (l != NULL)
  	{
  	    /* list argument, get next string */
  	    if (li == NULL)
  		break;
  	    line = get_tv_string_chk(&li->li_tv);
  	    li = li->li_next;
  	}
  
  	rettv->vval.v_number = 1;	/* FAIL */
  	if (line == NULL || lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
  	    break;
  
  	/* When coming here from Insert mode, sync undo, so that this can be
  	 * undone separately from what was previously inserted. */
  	if (u_sync_once == 2)
  	{
  	    u_sync_once = 1; /* notify that u_sync() was called */
  	    u_sync(TRUE);
  	}
  
  	if (lnum <= curbuf->b_ml.ml_line_count)
  	{
  	    /* existing line, replace it */
  	    if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
  	    {
  		changed_bytes(lnum, 0);
  		if (lnum == curwin->w_cursor.lnum)
  		    check_cursor_col();
  		rettv->vval.v_number = 0;	/* OK */
  	    }
  	}
  	else if (added > 0 || u_save(lnum - 1, lnum) == OK)
  	{
  	    /* lnum is one past the last line, append the line */
  	    ++added;
  	    if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
  		rettv->vval.v_number = 0;	/* OK */
  	}
  
  	if (l == NULL)			/* only one string argument */
  	    break;
  	++lnum;
      }
  
      if (added > 0)
  	appended_lines_mark(lcount, added);
  }
  
  static void set_qf_ll_list __ARGS((win_T *wp, typval_T *list_arg, typval_T *action_arg, typval_T *rettv));
  
  /*
   * Used by "setqflist()" and "setloclist()" functions
   */
      static void
  set_qf_ll_list(wp, list_arg, action_arg, rettv)
      win_T	*wp UNUSED;
      typval_T	*list_arg UNUSED;
      typval_T	*action_arg UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_QUICKFIX
      char_u	*act;
      int		action = ' ';
  #endif
  
      rettv->vval.v_number = -1;
  
  #ifdef FEAT_QUICKFIX
      if (list_arg->v_type != VAR_LIST)
  	EMSG(_(e_listreq));
      else
      {
  	list_T  *l = list_arg->vval.v_list;
  
  	if (action_arg->v_type == VAR_STRING)
  	{
  	    act = get_tv_string_chk(action_arg);
  	    if (act == NULL)
  		return;		/* type error; errmsg already given */
  	    if (*act == 'a' || *act == 'r')
  		action = *act;
  	}
  
  	if (l != NULL && set_errorlist(wp, l, action,
  	       (char_u *)(wp == NULL ? "setqflist()" : "setloclist()")) == OK)
  	    rettv->vval.v_number = 0;
      }
  #endif
  }
  
  /*
   * "setloclist()" function
   */
      static void
  f_setloclist(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      win_T	*win;
  
      rettv->vval.v_number = -1;
  
      win = find_win_by_nr(&argvars[0], NULL);
      if (win != NULL)
  	set_qf_ll_list(win, &argvars[1], &argvars[2], rettv);
  }
  
  /*
   * "setmatches()" function
   */
      static void
  f_setmatches(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_SEARCH_EXTRA
      list_T	*l;
      listitem_T	*li;
      dict_T	*d;
      list_T	*s = NULL;
  
      rettv->vval.v_number = -1;
      if (argvars[0].v_type != VAR_LIST)
      {
  	EMSG(_(e_listreq));
  	return;
      }
      if ((l = argvars[0].vval.v_list) != NULL)
      {
  
  	/* To some extent make sure that we are dealing with a list from
  	 * "getmatches()". */
  	li = l->lv_first;
  	while (li != NULL)
  	{
  	    if (li->li_tv.v_type != VAR_DICT
  		    || (d = li->li_tv.vval.v_dict) == NULL)
  	    {
  		EMSG(_(e_invarg));
  		return;
  	    }
  	    if (!(dict_find(d, (char_u *)"group", -1) != NULL
  			&& (dict_find(d, (char_u *)"pattern", -1) != NULL
  			    || dict_find(d, (char_u *)"pos1", -1) != NULL)
  			&& dict_find(d, (char_u *)"priority", -1) != NULL
  			&& dict_find(d, (char_u *)"id", -1) != NULL))
  	    {
  		EMSG(_(e_invarg));
  		return;
  	    }
  	    li = li->li_next;
  	}
  
  	clear_matches(curwin);
  	li = l->lv_first;
  	while (li != NULL)
  	{
  	    int		i = 0;
  	    char_u	buf[5];
  	    dictitem_T  *di;
  
  	    d = li->li_tv.vval.v_dict;
  
  	    if (dict_find(d, (char_u *)"pattern", -1) == NULL)
  	    {
  		if (s == NULL)
  		{
  		    s = list_alloc();
  		    if (s == NULL)
  			return;
  		}
  
  		/* match from matchaddpos() */
  		for (i = 1; i < 9; i++)
  		{
  		    sprintf((char *)buf, (char *)"pos%d", i);
  		    if ((di = dict_find(d, (char_u *)buf, -1)) != NULL)
  		    {
  			if (di->di_tv.v_type != VAR_LIST)
  			    return;
  
  			list_append_tv(s, &di->di_tv);
  			s->lv_refcount++;
  		    }
  		    else
  			break;
  		}
  	    }
  	    if (i == 0)
  	    {
  		match_add(curwin, get_dict_string(d, (char_u *)"group", FALSE),
  		    get_dict_string(d, (char_u *)"pattern", FALSE),
  		    (int)get_dict_number(d, (char_u *)"priority"),
  		    (int)get_dict_number(d, (char_u *)"id"), NULL);
  	    }
  	    else
  	    {
  		match_add(curwin, get_dict_string(d, (char_u *)"group", FALSE),
  		    NULL, (int)get_dict_number(d, (char_u *)"priority"),
  		    (int)get_dict_number(d, (char_u *)"id"), s);
  		list_unref(s);
  		s = NULL;
  	    }
  
  	    li = li->li_next;
  	}
  	rettv->vval.v_number = 0;
      }
  #endif
  }
  
  /*
   * "setpos()" function
   */
      static void
  f_setpos(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      pos_T	pos;
      int		fnum;
      char_u	*name;
      colnr_T	curswant = -1;
  
      rettv->vval.v_number = -1;
      name = get_tv_string_chk(argvars);
      if (name != NULL)
      {
  	if (list2fpos(&argvars[1], &pos, &fnum, &curswant) == OK)
  	{
  	    if (--pos.col < 0)
  		pos.col = 0;
  	    if (name[0] == '.' && name[1] == NUL)
  	    {
  		/* set cursor */
  		if (fnum == curbuf->b_fnum)
  		{
  		    curwin->w_cursor = pos;
  		    if (curswant >= 0)
  			curwin->w_curswant = curswant - 1;
  		    check_cursor();
  		    rettv->vval.v_number = 0;
  		}
  		else
  		    EMSG(_(e_invarg));
  	    }
  	    else if (name[0] == '\'' && name[1] != NUL && name[2] == NUL)
  	    {
  		/* set mark */
  		if (setmark_pos(name[1], &pos, fnum) == OK)
  		    rettv->vval.v_number = 0;
  	    }
  	    else
  		EMSG(_(e_invarg));
  	}
      }
  }
  
  /*
   * "setqflist()" function
   */
      static void
  f_setqflist(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      set_qf_ll_list(NULL, &argvars[0], &argvars[1], rettv);
  }
  
  /*
   * "setreg()" function
   */
      static void
  f_setreg(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		regname;
      char_u	*strregname;
      char_u	*stropt;
      char_u	*strval;
      int		append;
      char_u	yank_type;
      long	block_len;
  
      block_len = -1;
      yank_type = MAUTO;
      append = FALSE;
  
      strregname = get_tv_string_chk(argvars);
      rettv->vval.v_number = 1;		/* FAIL is default */
  
      if (strregname == NULL)
  	return;		/* type error; errmsg already given */
      regname = *strregname;
      if (regname == 0 || regname == '@')
  	regname = '"';
  
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	stropt = get_tv_string_chk(&argvars[2]);
  	if (stropt == NULL)
  	    return;		/* type error */
  	for (; *stropt != NUL; ++stropt)
  	    switch (*stropt)
  	    {
  		case 'a': case 'A':	/* append */
  		    append = TRUE;
  		    break;
  		case 'v': case 'c':	/* character-wise selection */
  		    yank_type = MCHAR;
  		    break;
  		case 'V': case 'l':	/* line-wise selection */
  		    yank_type = MLINE;
  		    break;
  		case 'b': case Ctrl_V:	/* block-wise selection */
  		    yank_type = MBLOCK;
  		    if (VIM_ISDIGIT(stropt[1]))
  		    {
  			++stropt;
  			block_len = getdigits(&stropt) - 1;
  			--stropt;
  		    }
  		    break;
  	    }
      }
  
      if (argvars[1].v_type == VAR_LIST)
      {
  	char_u		**lstval;
  	char_u		**allocval;
  	char_u		buf[NUMBUFLEN];
  	char_u		**curval;
  	char_u		**curallocval;
  	int		len = argvars[1].vval.v_list->lv_len;
  	listitem_T	*li;
  
  	/* First half: use for pointers to result lines; second half: use for
  	 * pointers to allocated copies. */
  	lstval = (char_u **)alloc(sizeof(char_u *) * ((len + 1) * 2));
  	if (lstval == NULL)
  	    return;
  	curval = lstval;
  	allocval = lstval + len + 2;
  	curallocval = allocval;
  
  	for (li = argvars[1].vval.v_list->lv_first; li != NULL;
  							     li = li->li_next)
  	{
  	    strval = get_tv_string_buf_chk(&li->li_tv, buf);
  	    if (strval == NULL)
  		goto free_lstval;
  	    if (strval == buf)
  	    {
  		/* Need to make a copy, next get_tv_string_buf_chk() will
  		 * overwrite the string. */
  		strval = vim_strsave(buf);
  		if (strval == NULL)
  		    goto free_lstval;
  		*curallocval++ = strval;
  	    }
  	    *curval++ = strval;
  	}
  	*curval++ = NULL;
  
  	write_reg_contents_lst(regname, lstval, -1,
  						append, yank_type, block_len);
  free_lstval:
  	while (curallocval > allocval)
  	    vim_free(*--curallocval);
  	vim_free(lstval);
      }
      else
      {
  	strval = get_tv_string_chk(&argvars[1]);
  	if (strval == NULL)
  	    return;
  	write_reg_contents_ex(regname, strval, -1,
  						append, yank_type, block_len);
      }
      rettv->vval.v_number = 0;
  }
  
  /*
   * "settabvar()" function
   */
      static void
  f_settabvar(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
  #ifdef FEAT_WINDOWS
      tabpage_T	*save_curtab;
      tabpage_T	*tp;
  #endif
      char_u	*varname, *tabvarname;
      typval_T	*varp;
  
      rettv->vval.v_number = 0;
  
      if (check_restricted() || check_secure())
  	return;
  
  #ifdef FEAT_WINDOWS
      tp = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
  #endif
      varname = get_tv_string_chk(&argvars[1]);
      varp = &argvars[2];
  
      if (varname != NULL && varp != NULL
  #ifdef FEAT_WINDOWS
  	    && tp != NULL
  #endif
  	    )
      {
  #ifdef FEAT_WINDOWS
  	save_curtab = curtab;
  	goto_tabpage_tp(tp, FALSE, FALSE);
  #endif
  
  	tabvarname = alloc((unsigned)STRLEN(varname) + 3);
  	if (tabvarname != NULL)
  	{
  	    STRCPY(tabvarname, "t:");
  	    STRCPY(tabvarname + 2, varname);
  	    set_var(tabvarname, varp, TRUE);
  	    vim_free(tabvarname);
  	}
  
  #ifdef FEAT_WINDOWS
  	/* Restore current tabpage */
  	if (valid_tabpage(save_curtab))
  	    goto_tabpage_tp(save_curtab, FALSE, FALSE);
  #endif
      }
  }
  
  /*
   * "settabwinvar()" function
   */
      static void
  f_settabwinvar(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      setwinvar(argvars, rettv, 1);
  }
  
  /*
   * "setwinvar()" function
   */
      static void
  f_setwinvar(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      setwinvar(argvars, rettv, 0);
  }
  
  /*
   * "setwinvar()" and "settabwinvar()" functions
   */
  
      static void
  setwinvar(argvars, rettv, off)
      typval_T	*argvars;
      typval_T	*rettv UNUSED;
      int		off;
  {
      win_T	*win;
  #ifdef FEAT_WINDOWS
      win_T	*save_curwin;
      tabpage_T	*save_curtab;
  #endif
      char_u	*varname, *winvarname;
      typval_T	*varp;
      char_u	nbuf[NUMBUFLEN];
      tabpage_T	*tp = NULL;
  
      if (check_restricted() || check_secure())
  	return;
  
  #ifdef FEAT_WINDOWS
      if (off == 1)
  	tp = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
      else
  	tp = curtab;
  #endif
      win = find_win_by_nr(&argvars[off], tp);
      varname = get_tv_string_chk(&argvars[off + 1]);
      varp = &argvars[off + 2];
  
      if (win != NULL && varname != NULL && varp != NULL)
      {
  #ifdef FEAT_WINDOWS
  	if (switch_win(&save_curwin, &save_curtab, win, tp, TRUE) == OK)
  #endif
  	{
  	    if (*varname == '&')
  	    {
  		long	numval;
  		char_u	*strval;
  		int		error = FALSE;
  
  		++varname;
  		numval = get_tv_number_chk(varp, &error);
  		strval = get_tv_string_buf_chk(varp, nbuf);
  		if (!error && strval != NULL)
  		    set_option_value(varname, numval, strval, OPT_LOCAL);
  	    }
  	    else
  	    {
  		winvarname = alloc((unsigned)STRLEN(varname) + 3);
  		if (winvarname != NULL)
  		{
  		    STRCPY(winvarname, "w:");
  		    STRCPY(winvarname + 2, varname);
  		    set_var(winvarname, varp, TRUE);
  		    vim_free(winvarname);
  		}
  	    }
  	}
  #ifdef FEAT_WINDOWS
  	restore_win(save_curwin, save_curtab, TRUE);
  #endif
      }
  }
  
  #ifdef FEAT_CRYPT
  /*
   * "sha256({string})" function
   */
      static void
  f_sha256(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*p;
  
      p = get_tv_string(&argvars[0]);
      rettv->vval.v_string = vim_strsave(
  				    sha256_bytes(p, (int)STRLEN(p), NULL, 0));
      rettv->v_type = VAR_STRING;
  }
  #endif /* FEAT_CRYPT */
  
  /*
   * "shellescape({string})" function
   */
      static void
  f_shellescape(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_string = vim_strsave_shellescape(
  		get_tv_string(&argvars[0]), non_zero_arg(&argvars[1]), TRUE);
      rettv->v_type = VAR_STRING;
  }
  
  /*
   * shiftwidth() function
   */
      static void
  f_shiftwidth(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->vval.v_number = get_sw_value(curbuf);
  }
  
  /*
   * "simplify()" function
   */
      static void
  f_simplify(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*p;
  
      p = get_tv_string(&argvars[0]);
      rettv->vval.v_string = vim_strsave(p);
      simplify_filename(rettv->vval.v_string);	/* simplify in place */
      rettv->v_type = VAR_STRING;
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "sin()" function
   */
      static void
  f_sin(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = sin(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  
  /*
   * "sinh()" function
   */
      static void
  f_sinh(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = sinh(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  static int
  #ifdef __BORLANDC__
      _RTLENTRYF
  #endif
  	item_compare __ARGS((const void *s1, const void *s2));
  static int
  #ifdef __BORLANDC__
      _RTLENTRYF
  #endif
  	item_compare2 __ARGS((const void *s1, const void *s2));
  
  /* struct used in the array that's given to qsort() */
  typedef struct
  {
      listitem_T	*item;
      int		idx;
  } sortItem_T;
  
  static int	item_compare_ic;
  static int	item_compare_numeric;
  static char_u	*item_compare_func;
  static dict_T	*item_compare_selfdict;
  static int	item_compare_func_err;
  static int	item_compare_keep_zero;
  static void	do_sort_uniq __ARGS((typval_T *argvars, typval_T *rettv, int sort));
  #define ITEM_COMPARE_FAIL 999
  
  /*
   * Compare functions for f_sort() and f_uniq() below.
   */
      static int
  #ifdef __BORLANDC__
  _RTLENTRYF
  #endif
  item_compare(s1, s2)
      const void	*s1;
      const void	*s2;
  {
      sortItem_T  *si1, *si2;
      typval_T	*tv1, *tv2;
      char_u	*p1, *p2;
      char_u	*tofree1 = NULL, *tofree2 = NULL;
      int		res;
      char_u	numbuf1[NUMBUFLEN];
      char_u	numbuf2[NUMBUFLEN];
  
      si1 = (sortItem_T *)s1;
      si2 = (sortItem_T *)s2;
      tv1 = &si1->item->li_tv;
      tv2 = &si2->item->li_tv;
      /* tv2string() puts quotes around a string and allocates memory.  Don't do
       * that for string variables. Use a single quote when comparing with a
       * non-string to do what the docs promise. */
      if (tv1->v_type == VAR_STRING)
      {
  	if (tv2->v_type != VAR_STRING || item_compare_numeric)
  	    p1 = (char_u *)"'";
  	else
  	    p1 = tv1->vval.v_string;
      }
      else
  	p1 = tv2string(tv1, &tofree1, numbuf1, 0);
      if (tv2->v_type == VAR_STRING)
      {
  	if (tv1->v_type != VAR_STRING || item_compare_numeric)
  	    p2 = (char_u *)"'";
  	else
  	    p2 = tv2->vval.v_string;
      }
      else
  	p2 = tv2string(tv2, &tofree2, numbuf2, 0);
      if (p1 == NULL)
  	p1 = (char_u *)"";
      if (p2 == NULL)
  	p2 = (char_u *)"";
      if (!item_compare_numeric)
      {
  	if (item_compare_ic)
  	    res = STRICMP(p1, p2);
  	else
  	    res = STRCMP(p1, p2);
      }
      else
      {
  	double n1, n2;
  	n1 = strtod((char *)p1, (char **)&p1);
  	n2 = strtod((char *)p2, (char **)&p2);
  	res = n1 == n2 ? 0 : n1 > n2 ? 1 : -1;
      }
  
      /* When the result would be zero, compare the item indexes.  Makes the
       * sort stable. */
      if (res == 0 && !item_compare_keep_zero)
  	res = si1->idx > si2->idx ? 1 : -1;
  
      vim_free(tofree1);
      vim_free(tofree2);
      return res;
  }
  
      static int
  #ifdef __BORLANDC__
  _RTLENTRYF
  #endif
  item_compare2(s1, s2)
      const void	*s1;
      const void	*s2;
  {
      sortItem_T  *si1, *si2;
      int		res;
      typval_T	rettv;
      typval_T	argv[3];
      int		dummy;
  
      /* shortcut after failure in previous call; compare all items equal */
      if (item_compare_func_err)
  	return 0;
  
      si1 = (sortItem_T *)s1;
      si2 = (sortItem_T *)s2;
  
      /* Copy the values.  This is needed to be able to set v_lock to VAR_FIXED
       * in the copy without changing the original list items. */
      copy_tv(&si1->item->li_tv, &argv[0]);
      copy_tv(&si2->item->li_tv, &argv[1]);
  
      rettv.v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
      res = call_func(item_compare_func, (int)STRLEN(item_compare_func),
  				 &rettv, 2, argv, 0L, 0L, &dummy, TRUE,
  				 item_compare_selfdict);
      clear_tv(&argv[0]);
      clear_tv(&argv[1]);
  
      if (res == FAIL)
  	res = ITEM_COMPARE_FAIL;
      else
  	res = get_tv_number_chk(&rettv, &item_compare_func_err);
      if (item_compare_func_err)
  	res = ITEM_COMPARE_FAIL;  /* return value has wrong type */
      clear_tv(&rettv);
  
      /* When the result would be zero, compare the pointers themselves.  Makes
       * the sort stable. */
      if (res == 0 && !item_compare_keep_zero)
  	res = si1->idx > si2->idx ? 1 : -1;
  
      return res;
  }
  
  /*
   * "sort({list})" function
   */
      static void
  do_sort_uniq(argvars, rettv, sort)
      typval_T	*argvars;
      typval_T	*rettv;
      int		sort;
  {
      list_T	*l;
      listitem_T	*li;
      sortItem_T	*ptrs;
      long	len;
      long	i;
  
      if (argvars[0].v_type != VAR_LIST)
  	EMSG2(_(e_listarg), sort ? "sort()" : "uniq()");
      else
      {
  	l = argvars[0].vval.v_list;
  	if (l == NULL || tv_check_lock(l->lv_lock,
  	     (char_u *)(sort ? N_("sort() argument") : N_("uniq() argument")),
  									TRUE))
  	    return;
  	rettv->vval.v_list = l;
  	rettv->v_type = VAR_LIST;
  	++l->lv_refcount;
  
  	len = list_len(l);
  	if (len <= 1)
  	    return;	/* short list sorts pretty quickly */
  
  	item_compare_ic = FALSE;
  	item_compare_numeric = FALSE;
  	item_compare_func = NULL;
  	item_compare_selfdict = NULL;
  	if (argvars[1].v_type != VAR_UNKNOWN)
  	{
  	    /* optional second argument: {func} */
  	    if (argvars[1].v_type == VAR_FUNC)
  		item_compare_func = argvars[1].vval.v_string;
  	    else
  	    {
  		int	    error = FALSE;
  
  		i = get_tv_number_chk(&argvars[1], &error);
  		if (error)
  		    return;		/* type error; errmsg already given */
  		if (i == 1)
  		    item_compare_ic = TRUE;
  		else
  		    item_compare_func = get_tv_string(&argvars[1]);
  		if (item_compare_func != NULL)
  		{
  		    if (STRCMP(item_compare_func, "n") == 0)
  		    {
  			item_compare_func = NULL;
  			item_compare_numeric = TRUE;
  		    }
  		    else if (STRCMP(item_compare_func, "i") == 0)
  		    {
  			item_compare_func = NULL;
  			item_compare_ic = TRUE;
  		    }
  		}
  	    }
  
  	    if (argvars[2].v_type != VAR_UNKNOWN)
  	    {
  		/* optional third argument: {dict} */
  		if (argvars[2].v_type != VAR_DICT)
  		{
  		    EMSG(_(e_dictreq));
  		    return;
  		}
  		item_compare_selfdict = argvars[2].vval.v_dict;
  	    }
  	}
  
  	/* Make an array with each entry pointing to an item in the List. */
  	ptrs = (sortItem_T *)alloc((int)(len * sizeof(sortItem_T)));
  	if (ptrs == NULL)
  	    return;
  
  	i = 0;
  	if (sort)
  	{
  	    /* sort(): ptrs will be the list to sort */
  	    for (li = l->lv_first; li != NULL; li = li->li_next)
  	    {
  		ptrs[i].item = li;
  		ptrs[i].idx = i;
  		++i;
  	    }
  
  	    item_compare_func_err = FALSE;
  	    item_compare_keep_zero = FALSE;
  	    /* test the compare function */
  	    if (item_compare_func != NULL
  		    && item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
  							 == ITEM_COMPARE_FAIL)
  		EMSG(_("E702: Sort compare function failed"));
  	    else
  	    {
  		/* Sort the array with item pointers. */
  		qsort((void *)ptrs, (size_t)len, sizeof(sortItem_T),
  		    item_compare_func == NULL ? item_compare : item_compare2);
  
  		if (!item_compare_func_err)
  		{
  		    /* Clear the List and append the items in sorted order. */
  		    l->lv_first = l->lv_last = l->lv_idx_item = NULL;
  		    l->lv_len = 0;
  		    for (i = 0; i < len; ++i)
  			list_append(l, ptrs[i].item);
  		}
  	    }
  	}
  	else
  	{
  	    int	(*item_compare_func_ptr)__ARGS((const void *, const void *));
  
  	    /* f_uniq(): ptrs will be a stack of items to remove */
  	    item_compare_func_err = FALSE;
  	    item_compare_keep_zero = TRUE;
  	    item_compare_func_ptr = item_compare_func
  					       ? item_compare2 : item_compare;
  
  	    for (li = l->lv_first; li != NULL && li->li_next != NULL;
  							     li = li->li_next)
  	    {
  		if (item_compare_func_ptr((void *)&li, (void *)&li->li_next)
  									 == 0)
  		    ptrs[i++].item = li;
  		if (item_compare_func_err)
  		{
  		    EMSG(_("E882: Uniq compare function failed"));
  		    break;
  		}
  	    }
  
  	    if (!item_compare_func_err)
  	    {
  		while (--i >= 0)
  		{
  		    li = ptrs[i].item->li_next;
  		    ptrs[i].item->li_next = li->li_next;
  		    if (li->li_next != NULL)
  			li->li_next->li_prev = ptrs[i].item;
  		    else
  			l->lv_last = ptrs[i].item;
  		    list_fix_watch(l, li);
  		    listitem_free(li);
  		    l->lv_len--;
  		}
  	    }
  	}
  
  	vim_free(ptrs);
      }
  }
  
  /*
   * "sort({list})" function
   */
      static void
  f_sort(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      do_sort_uniq(argvars, rettv, TRUE);
  }
  
  /*
   * "uniq({list})" function
   */
      static void
  f_uniq(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      do_sort_uniq(argvars, rettv, FALSE);
  }
  
  /*
   * "soundfold({word})" function
   */
      static void
  f_soundfold(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*s;
  
      rettv->v_type = VAR_STRING;
      s = get_tv_string(&argvars[0]);
  #ifdef FEAT_SPELL
      rettv->vval.v_string = eval_soundfold(s);
  #else
      rettv->vval.v_string = vim_strsave(s);
  #endif
  }
  
  /*
   * "spellbadword()" function
   */
      static void
  f_spellbadword(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      char_u	*word = (char_u *)"";
      hlf_T	attr = HLF_COUNT;
      int		len = 0;
  
      if (rettv_list_alloc(rettv) == FAIL)
  	return;
  
  #ifdef FEAT_SPELL
      if (argvars[0].v_type == VAR_UNKNOWN)
      {
  	/* Find the start and length of the badly spelled word. */
  	len = spell_move_to(curwin, FORWARD, TRUE, TRUE, &attr);
  	if (len != 0)
  	    word = ml_get_cursor();
      }
      else if (curwin->w_p_spell && *curbuf->b_s.b_p_spl != NUL)
      {
  	char_u	*str = get_tv_string_chk(&argvars[0]);
  	int	capcol = -1;
  
  	if (str != NULL)
  	{
  	    /* Check the argument for spelling. */
  	    while (*str != NUL)
  	    {
  		len = spell_check(curwin, str, &attr, &capcol, FALSE);
  		if (attr != HLF_COUNT)
  		{
  		    word = str;
  		    break;
  		}
  		str += len;
  	    }
  	}
      }
  #endif
  
      list_append_string(rettv->vval.v_list, word, len);
      list_append_string(rettv->vval.v_list, (char_u *)(
  			attr == HLF_SPB ? "bad" :
  			attr == HLF_SPR ? "rare" :
  			attr == HLF_SPL ? "local" :
  			attr == HLF_SPC ? "caps" :
  			""), -1);
  }
  
  /*
   * "spellsuggest()" function
   */
      static void
  f_spellsuggest(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_SPELL
      char_u	*str;
      int		typeerr = FALSE;
      int		maxcount;
      garray_T	ga;
      int		i;
      listitem_T	*li;
      int		need_capital = FALSE;
  #endif
  
      if (rettv_list_alloc(rettv) == FAIL)
  	return;
  
  #ifdef FEAT_SPELL
      if (curwin->w_p_spell && *curwin->w_s->b_p_spl != NUL)
      {
  	str = get_tv_string(&argvars[0]);
  	if (argvars[1].v_type != VAR_UNKNOWN)
  	{
  	    maxcount = get_tv_number_chk(&argvars[1], &typeerr);
  	    if (maxcount <= 0)
  		return;
  	    if (argvars[2].v_type != VAR_UNKNOWN)
  	    {
  		need_capital = get_tv_number_chk(&argvars[2], &typeerr);
  		if (typeerr)
  		    return;
  	    }
  	}
  	else
  	    maxcount = 25;
  
  	spell_suggest_list(&ga, str, maxcount, need_capital, FALSE);
  
  	for (i = 0; i < ga.ga_len; ++i)
  	{
  	    str = ((char_u **)ga.ga_data)[i];
  
  	    li = listitem_alloc();
  	    if (li == NULL)
  		vim_free(str);
  	    else
  	    {
  		li->li_tv.v_type = VAR_STRING;
  		li->li_tv.v_lock = 0;
  		li->li_tv.vval.v_string = str;
  		list_append(rettv->vval.v_list, li);
  	    }
  	}
  	ga_clear(&ga);
      }
  #endif
  }
  
      static void
  f_split(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*str;
      char_u	*end;
      char_u	*pat = NULL;
      regmatch_T	regmatch;
      char_u	patbuf[NUMBUFLEN];
      char_u	*save_cpo;
      int		match;
      colnr_T	col = 0;
      int		keepempty = FALSE;
      int		typeerr = FALSE;
  
      /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
      save_cpo = p_cpo;
      p_cpo = (char_u *)"";
  
      str = get_tv_string(&argvars[0]);
      if (argvars[1].v_type != VAR_UNKNOWN)
      {
  	pat = get_tv_string_buf_chk(&argvars[1], patbuf);
  	if (pat == NULL)
  	    typeerr = TRUE;
  	if (argvars[2].v_type != VAR_UNKNOWN)
  	    keepempty = get_tv_number_chk(&argvars[2], &typeerr);
      }
      if (pat == NULL || *pat == NUL)
  	pat = (char_u *)"[\\x01- ]\\+";
  
      if (rettv_list_alloc(rettv) == FAIL)
  	return;
      if (typeerr)
  	return;
  
      regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
      if (regmatch.regprog != NULL)
      {
  	regmatch.rm_ic = FALSE;
  	while (*str != NUL || keepempty)
  	{
  	    if (*str == NUL)
  		match = FALSE;	/* empty item at the end */
  	    else
  		match = vim_regexec_nl(&regmatch, str, col);
  	    if (match)
  		end = regmatch.startp[0];
  	    else
  		end = str + STRLEN(str);
  	    if (keepempty || end > str || (rettv->vval.v_list->lv_len > 0
  			   && *str != NUL && match && end < regmatch.endp[0]))
  	    {
  		if (list_append_string(rettv->vval.v_list, str,
  						    (int)(end - str)) == FAIL)
  		    break;
  	    }
  	    if (!match)
  		break;
  	    /* Advance to just after the match. */
  	    if (regmatch.endp[0] > str)
  		col = 0;
  	    else
  	    {
  		/* Don't get stuck at the same match. */
  #ifdef FEAT_MBYTE
  		col = (*mb_ptr2len)(regmatch.endp[0]);
  #else
  		col = 1;
  #endif
  	    }
  	    str = regmatch.endp[0];
  	}
  
  	vim_regfree(regmatch.regprog);
      }
  
      p_cpo = save_cpo;
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "sqrt()" function
   */
      static void
  f_sqrt(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = sqrt(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  
  /*
   * "str2float()" function
   */
      static void
  f_str2float(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u *p = skipwhite(get_tv_string(&argvars[0]));
  
      if (*p == '+')
  	p = skipwhite(p + 1);
      (void)string2float(p, &rettv->vval.v_float);
      rettv->v_type = VAR_FLOAT;
  }
  #endif
  
  /*
   * "str2nr()" function
   */
      static void
  f_str2nr(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		base = 10;
      char_u	*p;
      long	n;
  
      if (argvars[1].v_type != VAR_UNKNOWN)
      {
  	base = get_tv_number(&argvars[1]);
  	if (base != 8 && base != 10 && base != 16)
  	{
  	    EMSG(_(e_invarg));
  	    return;
  	}
      }
  
      p = skipwhite(get_tv_string(&argvars[0]));
      if (*p == '+')
  	p = skipwhite(p + 1);
      vim_str2nr(p, NULL, NULL, base == 8 ? 2 : 0, base == 16 ? 2 : 0, &n, NULL, 0);
      rettv->vval.v_number = n;
  }
  
  #ifdef HAVE_STRFTIME
  /*
   * "strftime({format}[, {time}])" function
   */
      static void
  f_strftime(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	result_buf[256];
      struct tm	*curtime;
      time_t	seconds;
      char_u	*p;
  
      rettv->v_type = VAR_STRING;
  
      p = get_tv_string(&argvars[0]);
      if (argvars[1].v_type == VAR_UNKNOWN)
  	seconds = time(NULL);
      else
  	seconds = (time_t)get_tv_number(&argvars[1]);
      curtime = localtime(&seconds);
      /* MSVC returns NULL for an invalid value of seconds. */
      if (curtime == NULL)
  	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
      else
      {
  # ifdef FEAT_MBYTE
  	vimconv_T   conv;
  	char_u	    *enc;
  
  	conv.vc_type = CONV_NONE;
  	enc = enc_locale();
  	convert_setup(&conv, p_enc, enc);
  	if (conv.vc_type != CONV_NONE)
  	    p = string_convert(&conv, p, NULL);
  # endif
  	if (p != NULL)
  	    (void)strftime((char *)result_buf, sizeof(result_buf),
  							  (char *)p, curtime);
  	else
  	    result_buf[0] = NUL;
  
  # ifdef FEAT_MBYTE
  	if (conv.vc_type != CONV_NONE)
  	    vim_free(p);
  	convert_setup(&conv, enc, p_enc);
  	if (conv.vc_type != CONV_NONE)
  	    rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
  	else
  # endif
  	    rettv->vval.v_string = vim_strsave(result_buf);
  
  # ifdef FEAT_MBYTE
  	/* Release conversion descriptors */
  	convert_setup(&conv, NULL, NULL);
  	vim_free(enc);
  # endif
      }
  }
  #endif
  
  /*
   * "stridx()" function
   */
      static void
  f_stridx(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	buf[NUMBUFLEN];
      char_u	*needle;
      char_u	*haystack;
      char_u	*save_haystack;
      char_u	*pos;
      int		start_idx;
  
      needle = get_tv_string_chk(&argvars[1]);
      save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
      rettv->vval.v_number = -1;
      if (needle == NULL || haystack == NULL)
  	return;		/* type error; errmsg already given */
  
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	int	    error = FALSE;
  
  	start_idx = get_tv_number_chk(&argvars[2], &error);
  	if (error || start_idx >= (int)STRLEN(haystack))
  	    return;
  	if (start_idx >= 0)
  	    haystack += start_idx;
      }
  
      pos	= (char_u *)strstr((char *)haystack, (char *)needle);
      if (pos != NULL)
  	rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
  }
  
  /*
   * "string()" function
   */
      static void
  f_string(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*tofree;
      char_u	numbuf[NUMBUFLEN];
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf, 0);
      /* Make a copy if we have a value but it's not in allocated memory. */
      if (rettv->vval.v_string != NULL && tofree == NULL)
  	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
  }
  
  /*
   * "strlen()" function
   */
      static void
  f_strlen(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = (varnumber_T)(STRLEN(
  					      get_tv_string(&argvars[0])));
  }
  
  /*
   * "strchars()" function
   */
      static void
  f_strchars(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u		*s = get_tv_string(&argvars[0]);
      int			skipcc = 0;
  #ifdef FEAT_MBYTE
      varnumber_T		len = 0;
      int			(*func_mb_ptr2char_adv)(char_u **pp);
  #endif
  
      if (argvars[1].v_type != VAR_UNKNOWN)
  	skipcc = get_tv_number_chk(&argvars[1], NULL);
      if (skipcc < 0 || skipcc > 1)
  	EMSG(_(e_invarg));
      else
      {
  #ifdef FEAT_MBYTE
  	func_mb_ptr2char_adv = skipcc ? mb_ptr2char_adv : mb_cptr2char_adv;
  	while (*s != NUL)
  	{
  	    func_mb_ptr2char_adv(&s);
  	    ++len;
  	}
  	rettv->vval.v_number = len;
  #else
  	rettv->vval.v_number = (varnumber_T)(STRLEN(s));
  #endif
      }
  }
  
  /*
   * "strdisplaywidth()" function
   */
      static void
  f_strdisplaywidth(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*s = get_tv_string(&argvars[0]);
      int		col = 0;
  
      if (argvars[1].v_type != VAR_UNKNOWN)
  	col = get_tv_number(&argvars[1]);
  
      rettv->vval.v_number = (varnumber_T)(linetabsize_col(col, s) - col);
  }
  
  /*
   * "strwidth()" function
   */
      static void
  f_strwidth(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*s = get_tv_string(&argvars[0]);
  
      rettv->vval.v_number = (varnumber_T)(
  #ifdef FEAT_MBYTE
  	    mb_string2cells(s, -1)
  #else
  	    STRLEN(s)
  #endif
  	    );
  }
  
  /*
   * "strpart()" function
   */
      static void
  f_strpart(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*p;
      int		n;
      int		len;
      int		slen;
      int		error = FALSE;
  
      p = get_tv_string(&argvars[0]);
      slen = (int)STRLEN(p);
  
      n = get_tv_number_chk(&argvars[1], &error);
      if (error)
  	len = 0;
      else if (argvars[2].v_type != VAR_UNKNOWN)
  	len = get_tv_number(&argvars[2]);
      else
  	len = slen - n;	    /* default len: all bytes that are available. */
  
      /*
       * Only return the overlap between the specified part and the actual
       * string.
       */
      if (n < 0)
      {
  	len += n;
  	n = 0;
      }
      else if (n > slen)
  	n = slen;
      if (len < 0)
  	len = 0;
      else if (n + len > slen)
  	len = slen - n;
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = vim_strnsave(p + n, len);
  }
  
  /*
   * "strridx()" function
   */
      static void
  f_strridx(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	buf[NUMBUFLEN];
      char_u	*needle;
      char_u	*haystack;
      char_u	*rest;
      char_u	*lastmatch = NULL;
      int		haystack_len, end_idx;
  
      needle = get_tv_string_chk(&argvars[1]);
      haystack = get_tv_string_buf_chk(&argvars[0], buf);
  
      rettv->vval.v_number = -1;
      if (needle == NULL || haystack == NULL)
  	return;		/* type error; errmsg already given */
  
      haystack_len = (int)STRLEN(haystack);
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	/* Third argument: upper limit for index */
  	end_idx = get_tv_number_chk(&argvars[2], NULL);
  	if (end_idx < 0)
  	    return;	/* can never find a match */
      }
      else
  	end_idx = haystack_len;
  
      if (*needle == NUL)
      {
  	/* Empty string matches past the end. */
  	lastmatch = haystack + end_idx;
      }
      else
      {
  	for (rest = haystack; *rest != '\0'; ++rest)
  	{
  	    rest = (char_u *)strstr((char *)rest, (char *)needle);
  	    if (rest == NULL || rest > haystack + end_idx)
  		break;
  	    lastmatch = rest;
  	}
      }
  
      if (lastmatch == NULL)
  	rettv->vval.v_number = -1;
      else
  	rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
  }
  
  /*
   * "strtrans()" function
   */
      static void
  f_strtrans(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
  }
  
  /*
   * "submatch()" function
   */
      static void
  f_submatch(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		error = FALSE;
      int		no;
      int		retList = 0;
  
      no = (int)get_tv_number_chk(&argvars[0], &error);
      if (error)
  	return;
      error = FALSE;
      if (argvars[1].v_type != VAR_UNKNOWN)
  	retList = get_tv_number_chk(&argvars[1], &error);
      if (error)
  	return;
  
      if (retList == 0)
      {
  	rettv->v_type = VAR_STRING;
  	rettv->vval.v_string = reg_submatch(no);
      }
      else
      {
  	rettv->v_type = VAR_LIST;
  	rettv->vval.v_list = reg_submatch_list(no);
      }
  }
  
  /*
   * "substitute()" function
   */
      static void
  f_substitute(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	patbuf[NUMBUFLEN];
      char_u	subbuf[NUMBUFLEN];
      char_u	flagsbuf[NUMBUFLEN];
  
      char_u	*str = get_tv_string_chk(&argvars[0]);
      char_u	*pat = get_tv_string_buf_chk(&argvars[1], patbuf);
      char_u	*sub = get_tv_string_buf_chk(&argvars[2], subbuf);
      char_u	*flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);
  
      rettv->v_type = VAR_STRING;
      if (str == NULL || pat == NULL || sub == NULL || flg == NULL)
  	rettv->vval.v_string = NULL;
      else
  	rettv->vval.v_string = do_string_sub(str, pat, sub, flg);
  }
  
  /*
   * "synID(lnum, col, trans)" function
   */
      static void
  f_synID(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      int		id = 0;
  #ifdef FEAT_SYN_HL
      long	lnum;
      long	col;
      int		trans;
      int		transerr = FALSE;
  
      lnum = get_tv_lnum(argvars);		/* -1 on type error */
      col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
      trans = get_tv_number_chk(&argvars[2], &transerr);
  
      if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
  	    && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
  	id = syn_get_id(curwin, lnum, (colnr_T)col, trans, NULL, FALSE);
  #endif
  
      rettv->vval.v_number = id;
  }
  
  /*
   * "synIDattr(id, what [, mode])" function
   */
      static void
  f_synIDattr(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      char_u	*p = NULL;
  #ifdef FEAT_SYN_HL
      int		id;
      char_u	*what;
      char_u	*mode;
      char_u	modebuf[NUMBUFLEN];
      int		modec;
  
      id = get_tv_number(&argvars[0]);
      what = get_tv_string(&argvars[1]);
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	mode = get_tv_string_buf(&argvars[2], modebuf);
  	modec = TOLOWER_ASC(mode[0]);
  	if (modec != 't' && modec != 'c' && modec != 'g')
  	    modec = 0;	/* replace invalid with current */
      }
      else
      {
  #ifdef FEAT_GUI
  	if (gui.in_use)
  	    modec = 'g';
  	else
  #endif
  	    if (t_colors > 1)
  	    modec = 'c';
  	else
  	    modec = 't';
      }
  
  
      switch (TOLOWER_ASC(what[0]))
      {
  	case 'b':
  		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
  		    p = highlight_color(id, what, modec);
  		else					/* bold */
  		    p = highlight_has_attr(id, HL_BOLD, modec);
  		break;
  
  	case 'f':					/* fg[#] or font */
  		p = highlight_color(id, what, modec);
  		break;
  
  	case 'i':
  		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
  		    p = highlight_has_attr(id, HL_INVERSE, modec);
  		else					/* italic */
  		    p = highlight_has_attr(id, HL_ITALIC, modec);
  		break;
  
  	case 'n':					/* name */
  		p = get_highlight_name(NULL, id - 1);
  		break;
  
  	case 'r':					/* reverse */
  		p = highlight_has_attr(id, HL_INVERSE, modec);
  		break;
  
  	case 's':
  		if (TOLOWER_ASC(what[1]) == 'p')	/* sp[#] */
  		    p = highlight_color(id, what, modec);
  		else					/* standout */
  		    p = highlight_has_attr(id, HL_STANDOUT, modec);
  		break;
  
  	case 'u':
  		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
  							/* underline */
  		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
  		else
  							/* undercurl */
  		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
  		break;
      }
  
      if (p != NULL)
  	p = vim_strsave(p);
  #endif
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = p;
  }
  
  /*
   * "synIDtrans(id)" function
   */
      static void
  f_synIDtrans(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      int		id;
  
  #ifdef FEAT_SYN_HL
      id = get_tv_number(&argvars[0]);
  
      if (id > 0)
  	id = syn_get_final_id(id);
      else
  #endif
  	id = 0;
  
      rettv->vval.v_number = id;
  }
  
  /*
   * "synconcealed(lnum, col)" function
   */
      static void
  f_synconcealed(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #if defined(FEAT_SYN_HL) && defined(FEAT_CONCEAL)
      long	lnum;
      long	col;
      int		syntax_flags = 0;
      int		cchar;
      int		matchid = 0;
      char_u	str[NUMBUFLEN];
  #endif
  
      rettv->v_type = VAR_LIST;
      rettv->vval.v_list = NULL;
  
  #if defined(FEAT_SYN_HL) && defined(FEAT_CONCEAL)
      lnum = get_tv_lnum(argvars);		/* -1 on type error */
      col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
  
      vim_memset(str, NUL, sizeof(str));
  
      if (rettv_list_alloc(rettv) != FAIL)
      {
  	if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
  	    && col >= 0 && col <= (long)STRLEN(ml_get(lnum))
  	    && curwin->w_p_cole > 0)
  	{
  	    (void)syn_get_id(curwin, lnum, col, FALSE, NULL, FALSE);
  	    syntax_flags = get_syntax_info(&matchid);
  
  	    /* get the conceal character */
  	    if ((syntax_flags & HL_CONCEAL) && curwin->w_p_cole < 3)
  	    {
  		cchar = syn_get_sub_char();
  		if (cchar == NUL && curwin->w_p_cole == 1 && lcs_conceal != NUL)
  		    cchar = lcs_conceal;
  		if (cchar != NUL)
  		{
  # ifdef FEAT_MBYTE
  		    if (has_mbyte)
  			(*mb_char2bytes)(cchar, str);
  		    else
  # endif
  			str[0] = cchar;
  		}
  	    }
  	}
  
  	list_append_number(rettv->vval.v_list,
  					    (syntax_flags & HL_CONCEAL) != 0);
  	/* -1 to auto-determine strlen */
  	list_append_string(rettv->vval.v_list, str, -1);
  	list_append_number(rettv->vval.v_list, matchid);
      }
  #endif
  }
  
  /*
   * "synstack(lnum, col)" function
   */
      static void
  f_synstack(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_SYN_HL
      long	lnum;
      long	col;
      int		i;
      int		id;
  #endif
  
      rettv->v_type = VAR_LIST;
      rettv->vval.v_list = NULL;
  
  #ifdef FEAT_SYN_HL
      lnum = get_tv_lnum(argvars);		/* -1 on type error */
      col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
  
      if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
  	    && col >= 0 && col <= (long)STRLEN(ml_get(lnum))
  	    && rettv_list_alloc(rettv) != FAIL)
      {
  	(void)syn_get_id(curwin, lnum, (colnr_T)col, FALSE, NULL, TRUE);
  	for (i = 0; ; ++i)
  	{
  	    id = syn_get_stack_item(i);
  	    if (id < 0)
  		break;
  	    if (list_append_number(rettv->vval.v_list, id) == FAIL)
  		break;
  	}
      }
  #endif
  }
  
      static void
  get_cmd_output_as_rettv(argvars, rettv, retlist)
      typval_T	*argvars;
      typval_T	*rettv;
      int		retlist;
  {
      char_u	*res = NULL;
      char_u	*p;
      char_u	*infile = NULL;
      char_u	buf[NUMBUFLEN];
      int		err = FALSE;
      FILE	*fd;
      list_T	*list = NULL;
      int		flags = SHELL_SILENT;
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
      if (check_restricted() || check_secure())
  	goto errret;
  
      if (argvars[1].v_type != VAR_UNKNOWN)
      {
  	/*
  	 * Write the string to a temp file, to be used for input of the shell
  	 * command.
  	 */
  	if ((infile = vim_tempname('i', TRUE)) == NULL)
  	{
  	    EMSG(_(e_notmp));
  	    goto errret;
  	}
  
  	fd = mch_fopen((char *)infile, WRITEBIN);
  	if (fd == NULL)
  	{
  	    EMSG2(_(e_notopen), infile);
  	    goto errret;
  	}
  	if (argvars[1].v_type == VAR_LIST)
  	{
  	    if (write_list(fd, argvars[1].vval.v_list, TRUE) == FAIL)
  		err = TRUE;
  	}
  	else
  	{
  	    size_t len;
  
  	    p = get_tv_string_buf_chk(&argvars[1], buf);
  	    if (p == NULL)
  	    {
  		fclose(fd);
  		goto errret;		/* type error; errmsg already given */
  	    }
  	    len = STRLEN(p);
  	    if (len > 0 && fwrite(p, len, 1, fd) != 1)
  		err = TRUE;
  	}
  	if (fclose(fd) != 0)
  	    err = TRUE;
  	if (err)
  	{
  	    EMSG(_("E677: Error writing temp file"));
  	    goto errret;
  	}
      }
  
      /* Omit SHELL_COOKED when invoked with ":silent".  Avoids that the shell
       * echoes typeahead, that messes up the display. */
      if (!msg_silent)
  	flags += SHELL_COOKED;
  
      if (retlist)
      {
  	int		len;
  	listitem_T	*li;
  	char_u		*s = NULL;
  	char_u		*start;
  	char_u		*end;
  	int		i;
  
  	res = get_cmd_output(get_tv_string(&argvars[0]), infile, flags, &len);
  	if (res == NULL)
  	    goto errret;
  
  	list = list_alloc();
  	if (list == NULL)
  	    goto errret;
  
  	for (i = 0; i < len; ++i)
  	{
  	    start = res + i;
  	    while (i < len && res[i] != NL)
  		++i;
  	    end = res + i;
  
  	    s = alloc((unsigned)(end - start + 1));
  	    if (s == NULL)
  		goto errret;
  
  	    for (p = s; start < end; ++p, ++start)
  		*p = *start == NUL ? NL : *start;
  	    *p = NUL;
  
  	    li = listitem_alloc();
  	    if (li == NULL)
  	    {
  		vim_free(s);
  		goto errret;
  	    }
  	    li->li_tv.v_type = VAR_STRING;
  	    li->li_tv.v_lock = 0;
  	    li->li_tv.vval.v_string = s;
  	    list_append(list, li);
  	}
  
  	++list->lv_refcount;
  	rettv->v_type = VAR_LIST;
  	rettv->vval.v_list = list;
  	list = NULL;
      }
      else
      {
  	res = get_cmd_output(get_tv_string(&argvars[0]), infile, flags, NULL);
  #ifdef USE_CR
  	/* translate <CR> into <NL> */
  	if (res != NULL)
  	{
  	    char_u	*s;
  
  	    for (s = res; *s; ++s)
  	    {
  		if (*s == CAR)
  		    *s = NL;
  	    }
  	}
  #else
  # ifdef USE_CRNL
  	/* translate <CR><NL> into <NL> */
  	if (res != NULL)
  	{
  	    char_u	*s, *d;
  
  	    d = res;
  	    for (s = res; *s; ++s)
  	    {
  		if (s[0] == CAR && s[1] == NL)
  		    ++s;
  		*d++ = *s;
  	    }
  	    *d = NUL;
  	}
  # endif
  #endif
  	rettv->vval.v_string = res;
  	res = NULL;
      }
  
  errret:
      if (infile != NULL)
      {
  	mch_remove(infile);
  	vim_free(infile);
      }
      if (res != NULL)
  	vim_free(res);
      if (list != NULL)
  	list_free(list, TRUE);
  }
  
  /*
   * "system()" function
   */
      static void
  f_system(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      get_cmd_output_as_rettv(argvars, rettv, FALSE);
  }
  
  /*
   * "systemlist()" function
   */
      static void
  f_systemlist(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      get_cmd_output_as_rettv(argvars, rettv, TRUE);
  }
  
  /*
   * "tabpagebuflist()" function
   */
      static void
  f_tabpagebuflist(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_WINDOWS
      tabpage_T	*tp;
      win_T	*wp = NULL;
  
      if (argvars[0].v_type == VAR_UNKNOWN)
  	wp = firstwin;
      else
      {
  	tp = find_tabpage((int)get_tv_number(&argvars[0]));
  	if (tp != NULL)
  	    wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
      }
      if (wp != NULL && rettv_list_alloc(rettv) != FAIL)
      {
  	for (; wp != NULL; wp = wp->w_next)
  	    if (list_append_number(rettv->vval.v_list,
  						wp->w_buffer->b_fnum) == FAIL)
  		break;
      }
  #endif
  }
  
  
  /*
   * "tabpagenr()" function
   */
      static void
  f_tabpagenr(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      int		nr = 1;
  #ifdef FEAT_WINDOWS
      char_u	*arg;
  
      if (argvars[0].v_type != VAR_UNKNOWN)
      {
  	arg = get_tv_string_chk(&argvars[0]);
  	nr = 0;
  	if (arg != NULL)
  	{
  	    if (STRCMP(arg, "$") == 0)
  		nr = tabpage_index(NULL) - 1;
  	    else
  		EMSG2(_(e_invexpr2), arg);
  	}
      }
      else
  	nr = tabpage_index(curtab);
  #endif
      rettv->vval.v_number = nr;
  }
  
  
  #ifdef FEAT_WINDOWS
  static int get_winnr __ARGS((tabpage_T *tp, typval_T *argvar));
  
  /*
   * Common code for tabpagewinnr() and winnr().
   */
      static int
  get_winnr(tp, argvar)
      tabpage_T	*tp;
      typval_T	*argvar;
  {
      win_T	*twin;
      int		nr = 1;
      win_T	*wp;
      char_u	*arg;
  
      twin = (tp == curtab) ? curwin : tp->tp_curwin;
      if (argvar->v_type != VAR_UNKNOWN)
      {
  	arg = get_tv_string_chk(argvar);
  	if (arg == NULL)
  	    nr = 0;		/* type error; errmsg already given */
  	else if (STRCMP(arg, "$") == 0)
  	    twin = (tp == curtab) ? lastwin : tp->tp_lastwin;
  	else if (STRCMP(arg, "#") == 0)
  	{
  	    twin = (tp == curtab) ? prevwin : tp->tp_prevwin;
  	    if (twin == NULL)
  		nr = 0;
  	}
  	else
  	{
  	    EMSG2(_(e_invexpr2), arg);
  	    nr = 0;
  	}
      }
  
      if (nr > 0)
  	for (wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
  					      wp != twin; wp = wp->w_next)
  	{
  	    if (wp == NULL)
  	    {
  		/* didn't find it in this tabpage */
  		nr = 0;
  		break;
  	    }
  	    ++nr;
  	}
      return nr;
  }
  #endif
  
  /*
   * "tabpagewinnr()" function
   */
      static void
  f_tabpagewinnr(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      int		nr = 1;
  #ifdef FEAT_WINDOWS
      tabpage_T	*tp;
  
      tp = find_tabpage((int)get_tv_number(&argvars[0]));
      if (tp == NULL)
  	nr = 0;
      else
  	nr = get_winnr(tp, &argvars[1]);
  #endif
      rettv->vval.v_number = nr;
  }
  
  
  /*
   * "tagfiles()" function
   */
      static void
  f_tagfiles(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      char_u	*fname;
      tagname_T	tn;
      int		first;
  
      if (rettv_list_alloc(rettv) == FAIL)
  	return;
      fname = alloc(MAXPATHL);
      if (fname == NULL)
  	return;
  
      for (first = TRUE; ; first = FALSE)
  	if (get_tagfname(&tn, first, fname) == FAIL
  		|| list_append_string(rettv->vval.v_list, fname, -1) == FAIL)
  	    break;
      tagname_free(&tn);
      vim_free(fname);
  }
  
  /*
   * "taglist()" function
   */
      static void
  f_taglist(argvars, rettv)
      typval_T  *argvars;
      typval_T  *rettv;
  {
      char_u  *tag_pattern;
  
      tag_pattern = get_tv_string(&argvars[0]);
  
      rettv->vval.v_number = FALSE;
      if (*tag_pattern == NUL)
  	return;
  
      if (rettv_list_alloc(rettv) == OK)
  	(void)get_tags(rettv->vval.v_list, tag_pattern);
  }
  
  /*
   * "tempname()" function
   */
      static void
  f_tempname(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      static int	x = 'A';
  
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = vim_tempname(x, FALSE);
  
      /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
       * names.  Skip 'I' and 'O', they are used for shell redirection. */
      do
      {
  	if (x == 'Z')
  	    x = '0';
  	else if (x == '9')
  	    x = 'A';
  	else
  	{
  #ifdef EBCDIC
  	    if (x == 'I')
  		x = 'J';
  	    else if (x == 'R')
  		x = 'S';
  	    else
  #endif
  		++x;
  	}
      } while (x == 'I' || x == 'O');
  }
  
  /*
   * "test(list)" function: Just checking the walls...
   */
      static void
  f_test(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
      /* Used for unit testing.  Change the code below to your liking. */
  #if 0
      listitem_T	*li;
      list_T	*l;
      char_u	*bad, *good;
  
      if (argvars[0].v_type != VAR_LIST)
  	return;
      l = argvars[0].vval.v_list;
      if (l == NULL)
  	return;
      li = l->lv_first;
      if (li == NULL)
  	return;
      bad = get_tv_string(&li->li_tv);
      li = li->li_next;
      if (li == NULL)
  	return;
      good = get_tv_string(&li->li_tv);
      rettv->vval.v_number = test_edit_score(bad, good);
  #endif
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "tan()" function
   */
      static void
  f_tan(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = tan(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  
  /*
   * "tanh()" function
   */
      static void
  f_tanh(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	rettv->vval.v_float = tanh(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  /*
   * "tolower(string)" function
   */
      static void
  f_tolower(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*p;
  
      p = vim_strsave(get_tv_string(&argvars[0]));
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = p;
  
      if (p != NULL)
  	while (*p != NUL)
  	{
  #ifdef FEAT_MBYTE
  	    int		l;
  
  	    if (enc_utf8)
  	    {
  		int c, lc;
  
  		c = utf_ptr2char(p);
  		lc = utf_tolower(c);
  		l = utf_ptr2len(p);
  		/* TODO: reallocate string when byte count changes. */
  		if (utf_char2len(lc) == l)
  		    utf_char2bytes(lc, p);
  		p += l;
  	    }
  	    else if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
  		p += l;		/* skip multi-byte character */
  	    else
  #endif
  	    {
  		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
  		++p;
  	    }
  	}
  }
  
  /*
   * "toupper(string)" function
   */
      static void
  f_toupper(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
  }
  
  /*
   * "tr(string, fromstr, tostr)" function
   */
      static void
  f_tr(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      char_u	*in_str;
      char_u	*fromstr;
      char_u	*tostr;
      char_u	*p;
  #ifdef FEAT_MBYTE
      int		inlen;
      int		fromlen;
      int		tolen;
      int		idx;
      char_u	*cpstr;
      int		cplen;
      int		first = TRUE;
  #endif
      char_u	buf[NUMBUFLEN];
      char_u	buf2[NUMBUFLEN];
      garray_T	ga;
  
      in_str = get_tv_string(&argvars[0]);
      fromstr = get_tv_string_buf_chk(&argvars[1], buf);
      tostr = get_tv_string_buf_chk(&argvars[2], buf2);
  
      /* Default return value: empty string. */
      rettv->v_type = VAR_STRING;
      rettv->vval.v_string = NULL;
      if (fromstr == NULL || tostr == NULL)
  	    return;		/* type error; errmsg already given */
      ga_init2(&ga, (int)sizeof(char), 80);
  
  #ifdef FEAT_MBYTE
      if (!has_mbyte)
  #endif
  	/* not multi-byte: fromstr and tostr must be the same length */
  	if (STRLEN(fromstr) != STRLEN(tostr))
  	{
  #ifdef FEAT_MBYTE
  error:
  #endif
  	    EMSG2(_(e_invarg2), fromstr);
  	    ga_clear(&ga);
  	    return;
  	}
  
      /* fromstr and tostr have to contain the same number of chars */
      while (*in_str != NUL)
      {
  #ifdef FEAT_MBYTE
  	if (has_mbyte)
  	{
  	    inlen = (*mb_ptr2len)(in_str);
  	    cpstr = in_str;
  	    cplen = inlen;
  	    idx = 0;
  	    for (p = fromstr; *p != NUL; p += fromlen)
  	    {
  		fromlen = (*mb_ptr2len)(p);
  		if (fromlen == inlen && STRNCMP(in_str, p, inlen) == 0)
  		{
  		    for (p = tostr; *p != NUL; p += tolen)
  		    {
  			tolen = (*mb_ptr2len)(p);
  			if (idx-- == 0)
  			{
  			    cplen = tolen;
  			    cpstr = p;
  			    break;
  			}
  		    }
  		    if (*p == NUL)	/* tostr is shorter than fromstr */
  			goto error;
  		    break;
  		}
  		++idx;
  	    }
  
  	    if (first && cpstr == in_str)
  	    {
  		/* Check that fromstr and tostr have the same number of
  		 * (multi-byte) characters.  Done only once when a character
  		 * of in_str doesn't appear in fromstr. */
  		first = FALSE;
  		for (p = tostr; *p != NUL; p += tolen)
  		{
  		    tolen = (*mb_ptr2len)(p);
  		    --idx;
  		}
  		if (idx != 0)
  		    goto error;
  	    }
  
  	    ga_grow(&ga, cplen);
  	    mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
  	    ga.ga_len += cplen;
  
  	    in_str += inlen;
  	}
  	else
  #endif
  	{
  	    /* When not using multi-byte chars we can do it faster. */
  	    p = vim_strchr(fromstr, *in_str);
  	    if (p != NULL)
  		ga_append(&ga, tostr[p - fromstr]);
  	    else
  		ga_append(&ga, *in_str);
  	    ++in_str;
  	}
      }
  
      /* add a terminating NUL */
      ga_grow(&ga, 1);
      ga_append(&ga, NUL);
  
      rettv->vval.v_string = ga.ga_data;
  }
  
  #ifdef FEAT_FLOAT
  /*
   * "trunc({float})" function
   */
      static void
  f_trunc(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      float_T	f;
  
      rettv->v_type = VAR_FLOAT;
      if (get_float_arg(argvars, &f) == OK)
  	/* trunc() is not in C90, use floor() or ceil() instead. */
  	rettv->vval.v_float = f > 0 ? floor(f) : ceil(f);
      else
  	rettv->vval.v_float = 0.0;
  }
  #endif
  
  /*
   * "type(expr)" function
   */
      static void
  f_type(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int n;
  
      switch (argvars[0].v_type)
      {
  	case VAR_NUMBER: n = 0; break;
  	case VAR_STRING: n = 1; break;
  	case VAR_FUNC:   n = 2; break;
  	case VAR_LIST:   n = 3; break;
  	case VAR_DICT:   n = 4; break;
  #ifdef FEAT_FLOAT
  	case VAR_FLOAT:  n = 5; break;
  #endif
  	default: EMSG2(_(e_intern2), "f_type()"); n = 0; break;
      }
      rettv->vval.v_number = n;
  }
  
  /*
   * "undofile(name)" function
   */
      static void
  f_undofile(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      rettv->v_type = VAR_STRING;
  #ifdef FEAT_PERSISTENT_UNDO
      {
  	char_u *fname = get_tv_string(&argvars[0]);
  
  	if (*fname == NUL)
  	{
  	    /* If there is no file name there will be no undo file. */
  	    rettv->vval.v_string = NULL;
  	}
  	else
  	{
  	    char_u *ffname = FullName_save(fname, FALSE);
  
  	    if (ffname != NULL)
  		rettv->vval.v_string = u_get_undo_file_name(ffname, FALSE);
  	    vim_free(ffname);
  	}
      }
  #else
      rettv->vval.v_string = NULL;
  #endif
  }
  
  /*
   * "undotree()" function
   */
      static void
  f_undotree(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      if (rettv_dict_alloc(rettv) == OK)
      {
  	dict_T *dict = rettv->vval.v_dict;
  	list_T *list;
  
  	dict_add_nr_str(dict, "synced", (long)curbuf->b_u_synced, NULL);
  	dict_add_nr_str(dict, "seq_last", curbuf->b_u_seq_last, NULL);
  	dict_add_nr_str(dict, "save_last",
  					(long)curbuf->b_u_save_nr_last, NULL);
  	dict_add_nr_str(dict, "seq_cur", curbuf->b_u_seq_cur, NULL);
  	dict_add_nr_str(dict, "time_cur", (long)curbuf->b_u_time_cur, NULL);
  	dict_add_nr_str(dict, "save_cur", (long)curbuf->b_u_save_nr_cur, NULL);
  
  	list = list_alloc();
  	if (list != NULL)
  	{
  	    u_eval_tree(curbuf->b_u_oldhead, list);
  	    dict_add_list(dict, "entries", list);
  	}
      }
  }
  
  /*
   * "values(dict)" function
   */
      static void
  f_values(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      dict_list(argvars, rettv, 1);
  }
  
  /*
   * "virtcol(string)" function
   */
      static void
  f_virtcol(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      colnr_T	vcol = 0;
      pos_T	*fp;
      int		fnum = curbuf->b_fnum;
  
      fp = var2fpos(&argvars[0], FALSE, &fnum);
      if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count
  						    && fnum == curbuf->b_fnum)
      {
  	getvvcol(curwin, fp, NULL, NULL, &vcol);
  	++vcol;
      }
  
      rettv->vval.v_number = vcol;
  }
  
  /*
   * "visualmode()" function
   */
      static void
  f_visualmode(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
      char_u	str[2];
  
      rettv->v_type = VAR_STRING;
      str[0] = curbuf->b_visual_mode_eval;
      str[1] = NUL;
      rettv->vval.v_string = vim_strsave(str);
  
      /* A non-zero number or non-empty string argument: reset mode. */
      if (non_zero_arg(&argvars[0]))
  	curbuf->b_visual_mode_eval = NUL;
  }
  
  /*
   * "wildmenumode()" function
   */
      static void
  f_wildmenumode(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv UNUSED;
  {
  #ifdef FEAT_WILDMENU
      if (wild_menu_showing)
  	rettv->vval.v_number = 1;
  #endif
  }
  
  /*
   * "winbufnr(nr)" function
   */
      static void
  f_winbufnr(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      win_T	*wp;
  
      wp = find_win_by_nr(&argvars[0], NULL);
      if (wp == NULL)
  	rettv->vval.v_number = -1;
      else
  	rettv->vval.v_number = wp->w_buffer->b_fnum;
  }
  
  /*
   * "wincol()" function
   */
      static void
  f_wincol(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      validate_cursor();
      rettv->vval.v_number = curwin->w_wcol + 1;
  }
  
  /*
   * "winheight(nr)" function
   */
      static void
  f_winheight(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      win_T	*wp;
  
      wp = find_win_by_nr(&argvars[0], NULL);
      if (wp == NULL)
  	rettv->vval.v_number = -1;
      else
  	rettv->vval.v_number = wp->w_height;
  }
  
  /*
   * "winline()" function
   */
      static void
  f_winline(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      validate_cursor();
      rettv->vval.v_number = curwin->w_wrow + 1;
  }
  
  /*
   * "winnr()" function
   */
      static void
  f_winnr(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      int		nr = 1;
  
  #ifdef FEAT_WINDOWS
      nr = get_winnr(curtab, &argvars[0]);
  #endif
      rettv->vval.v_number = nr;
  }
  
  /*
   * "winrestcmd()" function
   */
      static void
  f_winrestcmd(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
  #ifdef FEAT_WINDOWS
      win_T	*wp;
      int		winnr = 1;
      garray_T	ga;
      char_u	buf[50];
  
      ga_init2(&ga, (int)sizeof(char), 70);
      for (wp = firstwin; wp != NULL; wp = wp->w_next)
      {
  	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
  	ga_concat(&ga, buf);
  # ifdef FEAT_VERTSPLIT
  	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
  	ga_concat(&ga, buf);
  # endif
  	++winnr;
      }
      ga_append(&ga, NUL);
  
      rettv->vval.v_string = ga.ga_data;
  #else
      rettv->vval.v_string = NULL;
  #endif
      rettv->v_type = VAR_STRING;
  }
  
  /*
   * "winrestview()" function
   */
      static void
  f_winrestview(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv UNUSED;
  {
      dict_T	*dict;
  
      if (argvars[0].v_type != VAR_DICT
  	    || (dict = argvars[0].vval.v_dict) == NULL)
  	EMSG(_(e_invarg));
      else
      {
  	if (dict_find(dict, (char_u *)"lnum", -1) != NULL)
  	    curwin->w_cursor.lnum = get_dict_number(dict, (char_u *)"lnum");
  	if (dict_find(dict, (char_u *)"col", -1) != NULL)
  	    curwin->w_cursor.col = get_dict_number(dict, (char_u *)"col");
  #ifdef FEAT_VIRTUALEDIT
  	if (dict_find(dict, (char_u *)"coladd", -1) != NULL)
  	    curwin->w_cursor.coladd = get_dict_number(dict, (char_u *)"coladd");
  #endif
  	if (dict_find(dict, (char_u *)"curswant", -1) != NULL)
  	{
  	    curwin->w_curswant = get_dict_number(dict, (char_u *)"curswant");
  	    curwin->w_set_curswant = FALSE;
  	}
  
  	if (dict_find(dict, (char_u *)"topline", -1) != NULL)
  	    set_topline(curwin, get_dict_number(dict, (char_u *)"topline"));
  #ifdef FEAT_DIFF
  	if (dict_find(dict, (char_u *)"topfill", -1) != NULL)
  	    curwin->w_topfill = get_dict_number(dict, (char_u *)"topfill");
  #endif
  	if (dict_find(dict, (char_u *)"leftcol", -1) != NULL)
  	    curwin->w_leftcol = get_dict_number(dict, (char_u *)"leftcol");
  	if (dict_find(dict, (char_u *)"skipcol", -1) != NULL)
  	    curwin->w_skipcol = get_dict_number(dict, (char_u *)"skipcol");
  
  	check_cursor();
  	win_new_height(curwin, curwin->w_height);
  # ifdef FEAT_VERTSPLIT
  	win_new_width(curwin, W_WIDTH(curwin));
  # endif
  	changed_window_setting();
  
  	if (curwin->w_topline <= 0)
  	    curwin->w_topline = 1;
  	if (curwin->w_topline > curbuf->b_ml.ml_line_count)
  	    curwin->w_topline = curbuf->b_ml.ml_line_count;
  #ifdef FEAT_DIFF
  	check_topfill(curwin, TRUE);
  #endif
      }
  }
  
  /*
   * "winsaveview()" function
   */
      static void
  f_winsaveview(argvars, rettv)
      typval_T	*argvars UNUSED;
      typval_T	*rettv;
  {
      dict_T	*dict;
  
      if (rettv_dict_alloc(rettv) == FAIL)
  	return;
      dict = rettv->vval.v_dict;
  
      dict_add_nr_str(dict, "lnum", (long)curwin->w_cursor.lnum, NULL);
      dict_add_nr_str(dict, "col", (long)curwin->w_cursor.col, NULL);
  #ifdef FEAT_VIRTUALEDIT
      dict_add_nr_str(dict, "coladd", (long)curwin->w_cursor.coladd, NULL);
  #endif
      update_curswant();
      dict_add_nr_str(dict, "curswant", (long)curwin->w_curswant, NULL);
  
      dict_add_nr_str(dict, "topline", (long)curwin->w_topline, NULL);
  #ifdef FEAT_DIFF
      dict_add_nr_str(dict, "topfill", (long)curwin->w_topfill, NULL);
  #endif
      dict_add_nr_str(dict, "leftcol", (long)curwin->w_leftcol, NULL);
      dict_add_nr_str(dict, "skipcol", (long)curwin->w_skipcol, NULL);
  }
  
  /*
   * "winwidth(nr)" function
   */
      static void
  f_winwidth(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      win_T	*wp;
  
      wp = find_win_by_nr(&argvars[0], NULL);
      if (wp == NULL)
  	rettv->vval.v_number = -1;
      else
  #ifdef FEAT_VERTSPLIT
  	rettv->vval.v_number = wp->w_width;
  #else
  	rettv->vval.v_number = Columns;
  #endif
  }
  
  /*
   * Write list of strings to file
   */
      static int
  write_list(fd, list, binary)
      FILE	*fd;
      list_T	*list;
      int		binary;
  {
      listitem_T	*li;
      int		c;
      int		ret = OK;
      char_u	*s;
  
      for (li = list->lv_first; li != NULL; li = li->li_next)
      {
  	for (s = get_tv_string(&li->li_tv); *s != NUL; ++s)
  	{
  	    if (*s == '\n')
  		c = putc(NUL, fd);
  	    else
  		c = putc(*s, fd);
  	    if (c == EOF)
  	    {
  		ret = FAIL;
  		break;
  	    }
  	}
  	if (!binary || li->li_next != NULL)
  	    if (putc('\n', fd) == EOF)
  	    {
  		ret = FAIL;
  		break;
  	    }
  	if (ret == FAIL)
  	{
  	    EMSG(_(e_write));
  	    break;
  	}
      }
      return ret;
  }
  
  /*
   * "writefile()" function
   */
      static void
  f_writefile(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      int		binary = FALSE;
      int		append = FALSE;
      char_u	*fname;
      FILE	*fd;
      int		ret = 0;
  
      if (check_restricted() || check_secure())
  	return;
  
      if (argvars[0].v_type != VAR_LIST)
      {
  	EMSG2(_(e_listarg), "writefile()");
  	return;
      }
      if (argvars[0].vval.v_list == NULL)
  	return;
  
      if (argvars[2].v_type != VAR_UNKNOWN)
      {
  	if (vim_strchr(get_tv_string(&argvars[2]), 'b') != NULL)
  	    binary = TRUE;
  	if (vim_strchr(get_tv_string(&argvars[2]), 'a') != NULL)
  	    append = TRUE;
      }
  
      /* Always open the file in binary mode, library functions have a mind of
       * their own about CR-LF conversion. */
      fname = get_tv_string(&argvars[1]);
      if (*fname == NUL || (fd = mch_fopen((char *)fname,
  				      append ? APPENDBIN : WRITEBIN)) == NULL)
      {
  	EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
  	ret = -1;
      }
      else
      {
  	if (write_list(fd, argvars[0].vval.v_list, binary) == FAIL)
  	    ret = -1;
  	fclose(fd);
      }
  
      rettv->vval.v_number = ret;
  }
  
  /*
   * "xor(expr, expr)" function
   */
      static void
  f_xor(argvars, rettv)
      typval_T	*argvars;
      typval_T	*rettv;
  {
      rettv->vval.v_number = get_tv_number_chk(&argvars[0], NULL)
  					^ get_tv_number_chk(&argvars[1], NULL);
  }
  
  
  /*
   * Translate a String variable into a position.
   * Returns NULL when there is an error.
   */
      static pos_T *
  var2fpos(varp, dollar_lnum, fnum)
      typval_T	*varp;
      int		dollar_lnum;	/* TRUE when $ is last line */
      int		*fnum;		/* set to fnum for '0, 'A, etc. */
  {
      char_u		*name;
      static pos_T	pos;
      pos_T		*pp;
  
      /* Argument can be [lnum, col, coladd]. */
      if (varp->v_type == VAR_LIST)
      {
  	list_T		*l;
  	int		len;
  	int		error = FALSE;
  	listitem_T	*li;
  
  	l = varp->vval.v_list;
  	if (l == NULL)
  	    return NULL;
  
  	/* Get the line number */
  	pos.lnum = list_find_nr(l, 0L, &error);
  	if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count)
  	    return NULL;	/* invalid line number */
  
  	/* Get the column number */
  	pos.col = list_find_nr(l, 1L, &error);
  	if (error)
  	    return NULL;
  	len = (long)STRLEN(ml_get(pos.lnum));
  
  	/* We accept "$" for the column number: last column. */
  	li = list_find(l, 1L);
  	if (li != NULL && li->li_tv.v_type == VAR_STRING
  		&& li->li_tv.vval.v_string != NULL
  		&& STRCMP(li->li_tv.vval.v_string, "$") == 0)
  	    pos.col = len + 1;
  
  	/* Accept a position up to the NUL after the line. */
  	if (pos.col == 0 || (int)pos.col > len + 1)
  	    return NULL;	/* invalid column number */
  	--pos.col;
  
  #ifdef FEAT_VIRTUALEDIT
  	/* Get the virtual offset.  Defaults to zero. */
  	pos.coladd = list_find_nr(l, 2L, &error);
  	if (error)
  	    pos.coladd = 0;
  #endif
  
  	return &pos;
      }
  
      name = get_tv_string_chk(varp);
      if (name == NULL)
  	return NULL;
      if (name[0] == '.')				/* cursor */
  	return &curwin->w_cursor;
      if (name[0] == 'v' && name[1] == NUL)	/* Visual start */
      {
  	if (VIsual_active)
  	    return &VIsual;
  	return &curwin->w_cursor;
      }
      if (name[0] == '\'')			/* mark */
      {
  	pp = getmark_buf_fnum(curbuf, name[1], FALSE, fnum);
  	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
  	    return NULL;
  	return pp;
      }
  
  #ifdef FEAT_VIRTUALEDIT
      pos.coladd = 0;
  #endif
  
      if (name[0] == 'w' && dollar_lnum)
      {
  	pos.col = 0;
  	if (name[1] == '0')		/* "w0": first visible line */
  	{
  	    update_topline();
  	    pos.lnum = curwin->w_topline;
  	    return &pos;
  	}
  	else if (name[1] == '$')	/* "w$": last visible line */
  	{
  	    validate_botline();
  	    pos.lnum = curwin->w_botline - 1;
  	    return &pos;
  	}
      }
      else if (name[0] == '$')		/* last column or line */
      {
  	if (dollar_lnum)
  	{
  	    pos.lnum = curbuf->b_ml.ml_line_count;
  	    pos.col = 0;
  	}
  	else
  	{
  	    pos.lnum = curwin->w_cursor.lnum;
  	    pos.col = (colnr_T)STRLEN(ml_get_curline());
  	}
  	return &pos;
      }
      return NULL;
  }
  
  /*
   * Convert list in "arg" into a position and optional file number.
   * When "fnump" is NULL there is no file number, only 3 items.
   * Note that the column is passed on as-is, the caller may want to decrement
   * it to use 1 for the first column.
   * Return FAIL when conversion is not possible, doesn't check the position for
   * validity.
   */
      static int
  list2fpos(arg, posp, fnump, curswantp)
      typval_T	*arg;
      pos_T	*posp;
      int		*fnump;
      colnr_T	*curswantp;
  {
      list_T	*l = arg->vval.v_list;
      long	i = 0;
      long	n;
  
      /* List must be: [fnum, lnum, col, coladd, curswant], where "fnum" is only
       * there when "fnump" isn't NULL; "coladd" and "curswant" are optional. */
      if (arg->v_type != VAR_LIST
  	    || l == NULL
  	    || l->lv_len < (fnump == NULL ? 2 : 3)
  	    || l->lv_len > (fnump == NULL ? 4 : 5))
  	return FAIL;
  
      if (fnump != NULL)
      {
  	n = list_find_nr(l, i++, NULL);	/* fnum */
  	if (n < 0)
  	    return FAIL;
  	if (n == 0)
  	    n = curbuf->b_fnum;		/* current buffer */
  	*fnump = n;
      }
  
      n = list_find_nr(l, i++, NULL);	/* lnum */
      if (n < 0)
  	return FAIL;
      posp->lnum = n;
  
      n = list_find_nr(l, i++, NULL);	/* col */
      if (n < 0)
  	return FAIL;
      posp->col = n;
  
  #ifdef FEAT_VIRTUALEDIT
      n = list_find_nr(l, i, NULL);	/* off */
      if (n < 0)
  	posp->coladd = 0;
      else
  	posp->coladd = n;
  #endif
  
      if (curswantp != NULL)
  	*curswantp = list_find_nr(l, i + 1, NULL);  /* curswant */
  
      return OK;
  }
  
  /*
   * Get the length of an environment variable name.
   * Advance "arg" to the first character after the name.
   * Return 0 for error.
   */
      static int
  get_env_len(arg)
      char_u	**arg;
  {
      char_u	*p;
      int		len;
  
      for (p = *arg; vim_isIDc(*p); ++p)
  	;
      if (p == *arg)	    /* no name found */
  	return 0;
  
      len = (int)(p - *arg);
      *arg = p;
      return len;
  }
  
  /*
   * Get the length of the name of a function or internal variable.
   * "arg" is advanced to the first non-white character after the name.
   * Return 0 if something is wrong.
   */
      static int
  get_id_len(arg)
      char_u	**arg;
  {
      char_u	*p;
      int		len;
  
      /* Find the end of the name. */
      for (p = *arg; eval_isnamec(*p); ++p)
  	;
      if (p == *arg)	    /* no name found */
  	return 0;
  
      len = (int)(p - *arg);
      *arg = skipwhite(p);
  
      return len;
  }
  
  /*
   * Get the length of the name of a variable or function.
   * Only the name is recognized, does not handle ".key" or "[idx]".
   * "arg" is advanced to the first non-white character after the name.
   * Return -1 if curly braces expansion failed.
   * Return 0 if something else is wrong.
   * If the name contains 'magic' {}'s, expand them and return the
   * expanded name in an allocated string via 'alias' - caller must free.
   */
      static int
  get_name_len(arg, alias, evaluate, verbose)
      char_u	**arg;
      char_u	**alias;
      int		evaluate;
      int		verbose;
  {
      int		len;
      char_u	*p;
      char_u	*expr_start;
      char_u	*expr_end;
  
      *alias = NULL;  /* default to no alias */
  
      if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
  						  && (*arg)[2] == (int)KE_SNR)
      {
  	/* hard coded <SNR>, already translated */
  	*arg += 3;
  	return get_id_len(arg) + 3;
      }
      len = eval_fname_script(*arg);
      if (len > 0)
      {
  	/* literal "<SID>", "s:" or "<SNR>" */
  	*arg += len;
      }
  
      /*
       * Find the end of the name; check for {} construction.
       */
      p = find_name_end(*arg, &expr_start, &expr_end,
  					       len > 0 ? 0 : FNE_CHECK_START);
      if (expr_start != NULL)
      {
  	char_u	*temp_string;
  
  	if (!evaluate)
  	{
  	    len += (int)(p - *arg);
  	    *arg = skipwhite(p);
  	    return len;
  	}
  
  	/*
  	 * Include any <SID> etc in the expanded string:
  	 * Thus the -len here.
  	 */
  	temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
  	if (temp_string == NULL)
  	    return -1;
  	*alias = temp_string;
  	*arg = skipwhite(p);
  	return (int)STRLEN(temp_string);
      }
  
      len += get_id_len(arg);
      if (len == 0 && verbose)
  	EMSG2(_(e_invexpr2), *arg);
  
      return len;
  }
  
  /*
   * Find the end of a variable or function name, taking care of magic braces.
   * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
   * start and end of the first magic braces item.
   * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
   * Return a pointer to just after the name.  Equal to "arg" if there is no
   * valid name.
   */
      static char_u *
  find_name_end(arg, expr_start, expr_end, flags)
      char_u	*arg;
      char_u	**expr_start;
      char_u	**expr_end;
      int		flags;
  {
      int		mb_nest = 0;
      int		br_nest = 0;
      char_u	*p;
  
      if (expr_start != NULL)
      {
  	*expr_start = NULL;
  	*expr_end = NULL;
      }
  
      /* Quick check for valid starting character. */
      if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
  	return arg;
  
      for (p = arg; *p != NUL
  		    && (eval_isnamec(*p)
  			|| *p == '{'
  			|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
  			|| mb_nest != 0
  			|| br_nest != 0); mb_ptr_adv(p))
      {
  	if (*p == '\'')
  	{
  	    /* skip over 'string' to avoid counting [ and ] inside it. */
  	    for (p = p + 1; *p != NUL && *p != '\''; mb_ptr_adv(p))
  		;
  	    if (*p == NUL)
  		break;
  	}
  	else if (*p == '"')
  	{
  	    /* skip over "str\"ing" to avoid counting [ and ] inside it. */
  	    for (p = p + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
  		if (*p == '\\' && p[1] != NUL)
  		    ++p;
  	    if (*p == NUL)
  		break;
  	}
  
  	if (mb_nest == 0)
  	{
  	    if (*p == '[')
  		++br_nest;
  	    else if (*p == ']')
  		--br_nest;
  	}
  
  	if (br_nest == 0)
  	{
  	    if (*p == '{')
  	    {
  		mb_nest++;
  		if (expr_start != NULL && *expr_start == NULL)
  		    *expr_start = p;
  	    }
  	    else if (*p == '}')
  	    {
  		mb_nest--;
  		if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
  		    *expr_end = p;
  	    }
  	}
      }
  
      return p;
  }
  
  /*
   * Expands out the 'magic' {}'s in a variable/function name.
   * Note that this can call itself recursively, to deal with
   * constructs like foo{bar}{baz}{bam}
   * The four pointer arguments point to "foo{expre}ss{ion}bar"
   *			"in_start"      ^
   *			"expr_start"	   ^
   *			"expr_end"		 ^
   *			"in_end"			    ^
   *
   * Returns a new allocated string, which the caller must free.
   * Returns NULL for failure.
   */
      static char_u *
  make_expanded_name(in_start, expr_start, expr_end, in_end)
      char_u	*in_start;
      char_u	*expr_start;
      char_u	*expr_end;
      char_u	*in_end;
  {
      char_u	c1;
      char_u	*retval = NULL;
      char_u	*temp_result;
      char_u	*nextcmd = NULL;
  
      if (expr_end == NULL || in_end == NULL)
  	return NULL;
      *expr_start	= NUL;
      *expr_end = NUL;
      c1 = *in_end;
      *in_end = NUL;
  
      temp_result = eval_to_string(expr_start + 1, &nextcmd, FALSE);
      if (temp_result != NULL && nextcmd == NULL)
      {
  	retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
  						   + (in_end - expr_end) + 1));
  	if (retval != NULL)
  	{
  	    STRCPY(retval, in_start);
  	    STRCAT(retval, temp_result);
  	    STRCAT(retval, expr_end + 1);
  	}
      }
      vim_free(temp_result);
  
      *in_end = c1;		/* put char back for error messages */
      *expr_start = '{';
      *expr_end = '}';
  
      if (retval != NULL)
      {
  	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
  	if (expr_start != NULL)
  	{
  	    /* Further expansion! */
  	    temp_result = make_expanded_name(retval, expr_start,
  						       expr_end, temp_result);
  	    vim_free(retval);
  	    retval = temp_result;
  	}
      }
  
      return retval;
  }
  
  /*
   * Return TRUE if character "c" can be used in a variable or function name.
   * Does not include '{' or '}' for magic braces.
   */
      static int
  eval_isnamec(c)
      int	    c;
  {
      return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
  }
  
  /*
   * Return TRUE if character "c" can be used as the first character in a
   * variable or function name (excluding '{' and '}').
   */
      static int
  eval_isnamec1(c)
      int	    c;
  {
      return (ASCII_ISALPHA(c) || c == '_');
  }
  
  /*
   * Set number v: variable to "val".
   */
      void
  set_vim_var_nr(idx, val)
      int		idx;
      long	val;
  {
      vimvars[idx].vv_nr = val;
  }
  
  /*
   * Get number v: variable value.
   */
      long
  get_vim_var_nr(idx)
      int		idx;
  {
      return vimvars[idx].vv_nr;
  }
  
  /*
   * Get string v: variable value.  Uses a static buffer, can only be used once.
   */
      char_u *
  get_vim_var_str(idx)
      int		idx;
  {
      return get_tv_string(&vimvars[idx].vv_tv);
  }
  
  /*
   * Get List v: variable value.  Caller must take care of reference count when
   * needed.
   */
      list_T *
  get_vim_var_list(idx)
      int		idx;
  {
      return vimvars[idx].vv_list;
  }
  
  /*
   * Set v:char to character "c".
   */
      void
  set_vim_var_char(c)
      int c;
  {
      char_u	buf[MB_MAXBYTES + 1];
  
  #ifdef FEAT_MBYTE
      if (has_mbyte)
  	buf[(*mb_char2bytes)(c, buf)] = NUL;
      else
  #endif
      {
  	buf[0] = c;
  	buf[1] = NUL;
      }
      set_vim_var_string(VV_CHAR, buf, -1);
  }
  
  /*
   * Set v:count to "count" and v:count1 to "count1".
   * When "set_prevcount" is TRUE first set v:prevcount from v:count.
   */
      void
  set_vcount(count, count1, set_prevcount)
      long	count;
      long	count1;
      int		set_prevcount;
  {
      if (set_prevcount)
  	vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
      vimvars[VV_COUNT].vv_nr = count;
      vimvars[VV_COUNT1].vv_nr = count1;
  }
  
  /*
   * Set string v: variable to a copy of "val".
   */
      void
  set_vim_var_string(idx, val, len)
      int		idx;
      char_u	*val;
      int		len;	    /* length of "val" to use or -1 (whole string) */
  {
      /* Need to do this (at least) once, since we can't initialize a union.
       * Will always be invoked when "v:progname" is set. */
      vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
  
      vim_free(vimvars[idx].vv_str);
      if (val == NULL)
  	vimvars[idx].vv_str = NULL;
      else if (len == -1)
  	vimvars[idx].vv_str = vim_strsave(val);
      else
  	vimvars[idx].vv_str = vim_strnsave(val, len);
  }
  
  /*
   * Set List v: variable to "val".
   */
      void
  set_vim_var_list(idx, val)
      int		idx;
      list_T	*val;
  {
      list_unref(vimvars[idx].vv_list);
      vimvars[idx].vv_list = val;
      if (val != NULL)
  	++val->lv_refcount;
  }
  
  /*
   * Set Dictionary v: variable to "val".
   */
      void
  set_vim_var_dict(idx, val)
      int		idx;
      dict_T	*val;
  {
      int		todo;
      hashitem_T	*hi;
  
      dict_unref(vimvars[idx].vv_dict);
      vimvars[idx].vv_dict = val;
      if (val != NULL)
      {
  	++val->dv_refcount;
  
  	/* Set readonly */
  	todo = (int)val->dv_hashtab.ht_used;
  	for (hi = val->dv_hashtab.ht_array; todo > 0 ; ++hi)
  	{
  	    if (HASHITEM_EMPTY(hi))
  		continue;
  	    --todo;
  	    HI2DI(hi)->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
  	}
      }
  }
  
  /*
   * Set v:register if needed.
   */
      void
  set_reg_var(c)
      int		c;
  {
      char_u	regname;
  
      if (c == 0 || c == ' ')
  	regname = '"';
      else
  	regname = c;
      /* Avoid free/alloc when the value is already right. */
      if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
  	set_vim_var_string(VV_REG, &regname, 1);
  }
  
  /*
   * Get or set v:exception.  If "oldval" == NULL, return the current value.
   * Otherwise, restore the value to "oldval" and return NULL.
   * Must always be called in pairs to save and restore v:exception!  Does not
   * take care of memory allocations.
   */
      char_u *
  v_exception(oldval)
      char_u	*oldval;
  {
      if (oldval == NULL)
  	return vimvars[VV_EXCEPTION].vv_str;
  
      vimvars[VV_EXCEPTION].vv_str = oldval;
      return NULL;
  }
  
  /*
   * Get or set v:throwpoint.  If "oldval" == NULL, return the current value.
   * Otherwise, restore the value to "oldval" and return NULL.
   * Must always be called in pairs to save and restore v:throwpoint!  Does not
   * take care of memory allocations.
   */
      char_u *
  v_throwpoint(oldval)
      char_u	*oldval;
  {
      if (oldval == NULL)
  	return vimvars[VV_THROWPOINT].vv_str;
  
      vimvars[VV_THROWPOINT].vv_str = oldval;
      return NULL;
  }
  
  #if defined(FEAT_AUTOCMD) || defined(PROTO)
  /*
   * Set v:cmdarg.
   * If "eap" != NULL, use "eap" to generate the value and return the old value.
   * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
   * Must always be called in pairs!
   */
      char_u *
  set_cmdarg(eap, oldarg)
      exarg_T	*eap;
      char_u	*oldarg;
  {
      char_u	*oldval;
      char_u	*newval;
      unsigned	len;
  
      oldval = vimvars[VV_CMDARG].vv_str;
      if (eap == NULL)
      {
  	vim_free(oldval);
  	vimvars[VV_CMDARG].vv_str = oldarg;
  	return NULL;
      }
  
      if (eap->force_bin == FORCE_BIN)
  	len = 6;
      else if (eap->force_bin == FORCE_NOBIN)
  	len = 8;
      else
  	len = 0;
  
      if (eap->read_edit)
  	len += 7;
  
      if (eap->force_ff != 0)
  	len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
  # ifdef FEAT_MBYTE
      if (eap->force_enc != 0)
  	len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
      if (eap->bad_char != 0)
  	len += 7 + 4;  /* " ++bad=" + "keep" or "drop" */
  # endif
  
      newval = alloc(len + 1);
      if (newval == NULL)
  	return NULL;
  
      if (eap->force_bin == FORCE_BIN)
  	sprintf((char *)newval, " ++bin");
      else if (eap->force_bin == FORCE_NOBIN)
  	sprintf((char *)newval, " ++nobin");
      else
  	*newval = NUL;
  
      if (eap->read_edit)
  	STRCAT(newval, " ++edit");
  
      if (eap->force_ff != 0)
  	sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
  						eap->cmd + eap->force_ff);
  # ifdef FEAT_MBYTE
      if (eap->force_enc != 0)
  	sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
  					       eap->cmd + eap->force_enc);
      if (eap->bad_char == BAD_KEEP)
  	STRCPY(newval + STRLEN(newval), " ++bad=keep");
      else if (eap->bad_char == BAD_DROP)
  	STRCPY(newval + STRLEN(newval), " ++bad=drop");
      else if (eap->bad_char != 0)
  	sprintf((char *)newval + STRLEN(newval), " ++bad=%c", eap->bad_char);
  # endif
      vimvars[VV_CMDARG].vv_str = newval;
      return oldval;
  }
  #endif
  
  /*
   * Get the value of internal variable "name".
   * Return OK or FAIL.
   */
      static int
  get_var_tv(name, len, rettv, dip, verbose, no_autoload)
      char_u	*name;
      int		len;		/* length of "name" */
      typval_T	*rettv;		/* NULL when only checking existence */
      dictitem_T	**dip;		/* non-NULL when typval's dict item is needed */
      int		verbose;	/* may give error message */
      int		no_autoload;	/* do not use script autoloading */
  {
      int		ret = OK;
      typval_T	*tv = NULL;
      typval_T	atv;
      dictitem_T	*v;
      int		cc;
  
      /* truncate the name, so that we can use strcmp() */
      cc = name[len];
      name[len] = NUL;
  
      /*
       * Check for "b:changedtick".
       */
      if (STRCMP(name, "b:changedtick") == 0)
      {
  	atv.v_type = VAR_NUMBER;
  	atv.vval.v_number = curbuf->b_changedtick;
  	tv = &atv;
      }
  
      /*
       * Check for user-defined variables.
       */
      else
      {
  	v = find_var(name, NULL, no_autoload);
  	if (v != NULL)
  	{
  	    tv = &v->di_tv;
  	    if (dip != NULL)
  		*dip = v;
  	}
      }
  
      if (tv == NULL)
      {
  	if (rettv != NULL && verbose)
  	    EMSG2(_(e_undefvar), name);
  	ret = FAIL;
      }
      else if (rettv != NULL)
  	copy_tv(tv, rettv);
  
      name[len] = cc;
  
      return ret;
  }
  
  /*
   * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
   * Also handle function call with Funcref variable: func(expr)
   * Can all be combined: dict.func(expr)[idx]['func'](expr)
   */
      static int
  handle_subscript(arg, rettv, evaluate, verbose)
      char_u	**arg;
      typval_T	*rettv;
      int		evaluate;	/* do more than finding the end */
      int		verbose;	/* give error messages */
  {
      int		ret = OK;
      dict_T	*selfdict = NULL;
      char_u	*s;
      int		len;
      typval_T	functv;
  
      while (ret == OK
  	    && (**arg == '['
  		|| (**arg == '.' && rettv->v_type == VAR_DICT)
  		|| (**arg == '(' && (!evaluate || rettv->v_type == VAR_FUNC)))
  	    && !vim_iswhite(*(*arg - 1)))
      {
  	if (**arg == '(')
  	{
  	    /* need to copy the funcref so that we can clear rettv */
  	    if (evaluate)
  	    {
  		functv = *rettv;
  		rettv->v_type = VAR_UNKNOWN;
  
  		/* Invoke the function.  Recursive! */
  		s = functv.vval.v_string;
  	    }
  	    else
  		s = (char_u *)"";
  	    ret = get_func_tv(s, (int)STRLEN(s), rettv, arg,
  			curwin->w_cursor.lnum, curwin->w_cursor.lnum,
  			&len, evaluate, selfdict);
  
  	    /* Clear the funcref afterwards, so that deleting it while
  	     * evaluating the arguments is possible (see test55). */
  	    if (evaluate)
  		clear_tv(&functv);
  
  	    /* Stop the expression evaluation when immediately aborting on
  	     * error, or when an interrupt occurred or an exception was thrown
  	     * but not caught. */
  	    if (aborting())
  	    {
  		if (ret == OK)
  		    clear_tv(rettv);
  		ret = FAIL;
  	    }
  	    dict_unref(selfdict);
  	    selfdict = NULL;
  	}
  	else /* **arg == '[' || **arg == '.' */
  	{
  	    dict_unref(selfdict);
  	    if (rettv->v_type == VAR_DICT)
  	    {
  		selfdict = rettv->vval.v_dict;
  		if (selfdict != NULL)
  		    ++selfdict->dv_refcount;
  	    }
  	    else
  		selfdict = NULL;
  	    if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
  	    {
  		clear_tv(rettv);
  		ret = FAIL;
  	    }
  	}
      }
      dict_unref(selfdict);
      return ret;
  }
  
  /*
   * Allocate memory for a variable type-value, and make it empty (0 or NULL
   * value).
   */
      static typval_T *
  alloc_tv()
  {
      return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
  }
  
  /*
   * Allocate memory for a variable type-value, and assign a string to it.
   * The string "s" must have been allocated, it is consumed.
   * Return NULL for out of memory, the variable otherwise.
   */
      static typval_T *
  alloc_string_tv(s)
      char_u	*s;
  {
      typval_T	*rettv;
  
      rettv = alloc_tv();
      if (rettv != NULL)
      {
  	rettv->v_type = VAR_STRING;
  	rettv->vval.v_string = s;
      }
      else
  	vim_free(s);
      return rettv;
  }
  
  /*
   * Free the memory for a variable type-value.
   */
      void
  free_tv(varp)
      typval_T *varp;
  {
      if (varp != NULL)
      {
  	switch (varp->v_type)
  	{
  	    case VAR_FUNC:
  		func_unref(varp->vval.v_string);
  		/*FALLTHROUGH*/
  	    case VAR_STRING:
  		vim_free(varp->vval.v_string);
  		break;
  	    case VAR_LIST:
  		list_unref(varp->vval.v_list);
  		break;
  	    case VAR_DICT:
  		dict_unref(varp->vval.v_dict);
  		break;
  	    case VAR_NUMBER:
  #ifdef FEAT_FLOAT
  	    case VAR_FLOAT:
  #endif
  	    case VAR_UNKNOWN:
  		break;
  	    default:
  		EMSG2(_(e_intern2), "free_tv()");
  		break;
  	}
  	vim_free(varp);
      }
  }
  
  /*
   * Free the memory for a variable value and set the value to NULL or 0.
   */
      void
  clear_tv(varp)
      typval_T *varp;
  {
      if (varp != NULL)
      {
  	switch (varp->v_type)
  	{
  	    case VAR_FUNC:
  		func_unref(varp->vval.v_string);
  		/*FALLTHROUGH*/
  	    case VAR_STRING:
  		vim_free(varp->vval.v_string);
  		varp->vval.v_string = NULL;
  		break;
  	    case VAR_LIST:
  		list_unref(varp->vval.v_list);
  		varp->vval.v_list = NULL;
  		break;
  	    case VAR_DICT:
  		dict_unref(varp->vval.v_dict);
  		varp->vval.v_dict = NULL;
  		break;
  	    case VAR_NUMBER:
  		varp->vval.v_number = 0;
  		break;
  #ifdef FEAT_FLOAT
  	    case VAR_FLOAT:
  		varp->vval.v_float = 0.0;
  		break;
  #endif
  	    case VAR_UNKNOWN:
  		break;
  	    default:
  		EMSG2(_(e_intern2), "clear_tv()");
  	}
  	varp->v_lock = 0;
      }
  }
  
  /*
   * Set the value of a variable to NULL without freeing items.
   */
      static void
  init_tv(varp)
      typval_T *varp;
  {
      if (varp != NULL)
  	vim_memset(varp, 0, sizeof(typval_T));
  }
  
  /*
   * Get the number value of a variable.
   * If it is a String variable, uses vim_str2nr().
   * For incompatible types, return 0.
   * get_tv_number_chk() is similar to get_tv_number(), but informs the
   * caller of incompatible types: it sets *denote to TRUE if "denote"
   * is not NULL or returns -1 otherwise.
   */
      static long
  get_tv_number(varp)
      typval_T	*varp;
  {
      int		error = FALSE;
  
      return get_tv_number_chk(varp, &error);	/* return 0L on error */
  }
  
      long
  get_tv_number_chk(varp, denote)
      typval_T	*varp;
      int		*denote;
  {
      long	n = 0L;
  
      switch (varp->v_type)
      {
  	case VAR_NUMBER:
  	    return (long)(varp->vval.v_number);
  #ifdef FEAT_FLOAT
  	case VAR_FLOAT:
  	    EMSG(_("E805: Using a Float as a Number"));
  	    break;
  #endif
  	case VAR_FUNC:
  	    EMSG(_("E703: Using a Funcref as a Number"));
  	    break;
  	case VAR_STRING:
  	    if (varp->vval.v_string != NULL)
  		vim_str2nr(varp->vval.v_string, NULL, NULL,
  						    TRUE, TRUE, &n, NULL, 0);
  	    return n;
  	case VAR_LIST:
  	    EMSG(_("E745: Using a List as a Number"));
  	    break;
  	case VAR_DICT:
  	    EMSG(_("E728: Using a Dictionary as a Number"));
  	    break;
  	default:
  	    EMSG2(_(e_intern2), "get_tv_number()");
  	    break;
      }
      if (denote == NULL)		/* useful for values that must be unsigned */
  	n = -1;
      else
  	*denote = TRUE;
      return n;
  }
  
  /*
   * Get the lnum from the first argument.
   * Also accepts ".", "$", etc., but that only works for the current buffer.
   * Returns -1 on error.
   */
      static linenr_T
  get_tv_lnum(argvars)
      typval_T	*argvars;
  {
      typval_T	rettv;
      linenr_T	lnum;
  
      lnum = get_tv_number_chk(&argvars[0], NULL);
      if (lnum == 0)  /* no valid number, try using line() */
      {
  	rettv.v_type = VAR_NUMBER;
  	f_line(argvars, &rettv);
  	lnum = rettv.vval.v_number;
  	clear_tv(&rettv);
      }
      return lnum;
  }
  
  /*
   * Get the lnum from the first argument.
   * Also accepts "$", then "buf" is used.
   * Returns 0 on error.
   */
      static linenr_T
  get_tv_lnum_buf(argvars, buf)
      typval_T	*argvars;
      buf_T	*buf;
  {
      if (argvars[0].v_type == VAR_STRING
  	    && argvars[0].vval.v_string != NULL
  	    && argvars[0].vval.v_string[0] == '$'
  	    && buf != NULL)
  	return buf->b_ml.ml_line_count;
      return get_tv_number_chk(&argvars[0], NULL);
  }
  
  /*
   * Get the string value of a variable.
   * If it is a Number variable, the number is converted into a string.
   * get_tv_string() uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
   * get_tv_string_buf() uses a given buffer.
   * If the String variable has never been set, return an empty string.
   * Never returns NULL;
   * get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
   * NULL on error.
   */
      static char_u *
  get_tv_string(varp)
      typval_T	*varp;
  {
      static char_u   mybuf[NUMBUFLEN];
  
      return get_tv_string_buf(varp, mybuf);
  }
  
      static char_u *
  get_tv_string_buf(varp, buf)
      typval_T	*varp;
      char_u	*buf;
  {
      char_u	*res =  get_tv_string_buf_chk(varp, buf);
  
      return res != NULL ? res : (char_u *)"";
  }
  
  /*
   * Careful: This uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
   */
      char_u *
  get_tv_string_chk(varp)
      typval_T	*varp;
  {
      static char_u   mybuf[NUMBUFLEN];
  
      return get_tv_string_buf_chk(varp, mybuf);
  }
  
      static char_u *
  get_tv_string_buf_chk(varp, buf)
      typval_T	*varp;
      char_u	*buf;
  {
      switch (varp->v_type)
      {
  	case VAR_NUMBER:
  	    sprintf((char *)buf, "%ld", (long)varp->vval.v_number);
  	    return buf;
  	case VAR_FUNC:
  	    EMSG(_("E729: using Funcref as a String"));
  	    break;
  	case VAR_LIST:
  	    EMSG(_("E730: using List as a String"));
  	    break;
  	case VAR_DICT:
  	    EMSG(_("E731: using Dictionary as a String"));
  	    break;
  #ifdef FEAT_FLOAT
  	case VAR_FLOAT:
  	    EMSG(_(e_float_as_string));
  	    break;
  #endif
  	case VAR_STRING:
  	    if (varp->vval.v_string != NULL)
  		return varp->vval.v_string;
  	    return (char_u *)"";
  	default:
  	    EMSG2(_(e_intern2), "get_tv_string_buf()");
  	    break;
      }
      return NULL;
  }
  
  /*
   * Find variable "name" in the list of variables.
   * Return a pointer to it if found, NULL if not found.
   * Careful: "a:0" variables don't have a name.
   * When "htp" is not NULL we are writing to the variable, set "htp" to the
   * hashtab_T used.
   */
      static dictitem_T *
  find_var(name, htp, no_autoload)
      char_u	*name;
      hashtab_T	**htp;
      int		no_autoload;
  {
      char_u	*varname;
      hashtab_T	*ht;
  
      ht = find_var_ht(name, &varname);
      if (htp != NULL)
  	*htp = ht;
      if (ht == NULL)
  	return NULL;
      return find_var_in_ht(ht, *name, varname, no_autoload || htp != NULL);
  }
  
  /*
   * Find variable "varname" in hashtab "ht" with name "htname".
   * Returns NULL if not found.
   */
      static dictitem_T *
  find_var_in_ht(ht, htname, varname, no_autoload)
      hashtab_T	*ht;
      int		htname;
      char_u	*varname;
      int		no_autoload;
  {
      hashitem_T	*hi;
  
      if (*varname == NUL)
      {
  	/* Must be something like "s:", otherwise "ht" would be NULL. */
  	switch (htname)
  	{
  	    case 's': return &SCRIPT_SV(current_SID)->sv_var;
  	    case 'g': return &globvars_var;
  	    case 'v': return &vimvars_var;
  	    case 'b': return &curbuf->b_bufvar;
  	    case 'w': return &curwin->w_winvar;
  #ifdef FEAT_WINDOWS
  	    case 't': return &curtab->tp_winvar;
  #endif
  	    case 'l': return current_funccal == NULL
  					? NULL : &current_funccal->l_vars_var;
  	    case 'a': return current_funccal == NULL
  				       ? NULL : &current_funccal->l_avars_var;
  	}
  	return NULL;
      }
  
      hi = hash_find(ht, varname);
      if (HASHITEM_EMPTY(hi))
      {
  	/* For global variables we may try auto-loading the script.  If it
  	 * worked find the variable again.  Don't auto-load a script if it was
  	 * loaded already, otherwise it would be loaded every time when
  	 * checking if a function name is a Funcref variable. */
  	if (ht == &globvarht && !no_autoload)
  	{
  	    /* Note: script_autoload() may make "hi" invalid. It must either
  	     * be obtained again or not used. */
  	    if (!script_autoload(varname, FALSE) || aborting())
  		return NULL;
  	    hi = hash_find(ht, varname);
  	}
  	if (HASHITEM_EMPTY(hi))
  	    return NULL;
      }
      return HI2DI(hi);
  }
  
  /*
   * Find the hashtab used for a variable name.
   * Set "varname" to the start of name without ':'.
   */
      static hashtab_T *
  find_var_ht(name, varname)
      char_u  *name;
      char_u  **varname;
  {
      hashitem_T	*hi;
  
      if (name[1] != ':')
      {
  	/* The name must not start with a colon or #. */
  	if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
  	    return NULL;
  	*varname = name;
  
  	/* "version" is "v:version" in all scopes */
  	hi = hash_find(&compat_hashtab, name);
  	if (!HASHITEM_EMPTY(hi))
  	    return &compat_hashtab;
  
  	if (current_funccal == NULL)
  	    return &globvarht;			/* global variable */
  	return &current_funccal->l_vars.dv_hashtab; /* l: variable */
      }
      *varname = name + 2;
      if (*name == 'g')				/* global variable */
  	return &globvarht;
      /* There must be no ':' or '#' in the rest of the name, unless g: is used
       */
      if (vim_strchr(name + 2, ':') != NULL
  			       || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
  	return NULL;
      if (*name == 'b')				/* buffer variable */
  	return &curbuf->b_vars->dv_hashtab;
      if (*name == 'w')				/* window variable */
  	return &curwin->w_vars->dv_hashtab;
  #ifdef FEAT_WINDOWS
      if (*name == 't')				/* tab page variable */
  	return &curtab->tp_vars->dv_hashtab;
  #endif
      if (*name == 'v')				/* v: variable */
  	return &vimvarht;
      if (*name == 'a' && current_funccal != NULL) /* function argument */
  	return &current_funccal->l_avars.dv_hashtab;
      if (*name == 'l' && current_funccal != NULL) /* local function variable */
  	return &current_funccal->l_vars.dv_hashtab;
      if (*name == 's'				/* script variable */
  	    && current_SID > 0 && current_SID <= ga_scripts.ga_len)
  	return &SCRIPT_VARS(current_SID);
      return NULL;
  }
  
  /*
   * Get the string value of a (global/local) variable.
   * Note: see get_tv_string() for how long the pointer remains valid.
   * Returns NULL when it doesn't exist.
   */
      char_u *
  get_var_value(name)
      char_u	*name;
  {
      dictitem_T	*v;
  
      v = find_var(name, NULL, FALSE);
      if (v == NULL)
  	return NULL;
      return get_tv_string(&v->di_tv);
  }
  
  /*
   * Allocate a new hashtab for a sourced script.  It will be used while
   * sourcing this script and when executing functions defined in the script.
   */
      void
  new_script_vars(id)
      scid_T id;
  {
      int		i;
      hashtab_T	*ht;
      scriptvar_T *sv;
  
      if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
      {
  	/* Re-allocating ga_data means that an ht_array pointing to
  	 * ht_smallarray becomes invalid.  We can recognize this: ht_mask is
  	 * at its init value.  Also reset "v_dict", it's always the same. */
  	for (i = 1; i <= ga_scripts.ga_len; ++i)
  	{
  	    ht = &SCRIPT_VARS(i);
  	    if (ht->ht_mask == HT_INIT_SIZE - 1)
  		ht->ht_array = ht->ht_smallarray;
  	    sv = SCRIPT_SV(i);
  	    sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
  	}
  
  	while (ga_scripts.ga_len < id)
  	{
  	    sv = SCRIPT_SV(ga_scripts.ga_len + 1) =
  		(scriptvar_T *)alloc_clear(sizeof(scriptvar_T));
  	    init_var_dict(&sv->sv_dict, &sv->sv_var, VAR_SCOPE);
  	    ++ga_scripts.ga_len;
  	}
      }
  }
  
  /*
   * Initialize dictionary "dict" as a scope and set variable "dict_var" to
   * point to it.
   */
      void
  init_var_dict(dict, dict_var, scope)
      dict_T	*dict;
      dictitem_T	*dict_var;
      int		scope;
  {
      hash_init(&dict->dv_hashtab);
      dict->dv_lock = 0;
      dict->dv_scope = scope;
      dict->dv_refcount = DO_NOT_FREE_CNT;
      dict->dv_copyID = 0;
      dict_var->di_tv.vval.v_dict = dict;
      dict_var->di_tv.v_type = VAR_DICT;
      dict_var->di_tv.v_lock = VAR_FIXED;
      dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
      dict_var->di_key[0] = NUL;
  }
  
  /*
   * Unreference a dictionary initialized by init_var_dict().
   */
      void
  unref_var_dict(dict)
      dict_T	*dict;
  {
      /* Now the dict needs to be freed if no one else is using it, go back to
       * normal reference counting. */
      dict->dv_refcount -= DO_NOT_FREE_CNT - 1;
      dict_unref(dict);
  }
  
  /*
   * Clean up a list of internal variables.
   * Frees all allocated variables and the value they contain.
   * Clears hashtab "ht", does not free it.
   */
      void
  vars_clear(ht)
      hashtab_T *ht;
  {
      vars_clear_ext(ht, TRUE);
  }
  
  /*
   * Like vars_clear(), but only free the value if "free_val" is TRUE.
   */
      static void
  vars_clear_ext(ht, free_val)
      hashtab_T	*ht;
      int		free_val;
  {
      int		todo;
      hashitem_T	*hi;
      dictitem_T	*v;
  
      hash_lock(ht);
      todo = (int)ht->ht_used;
      for (hi = ht->ht_array; todo > 0; ++hi)
      {
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    --todo;
  
  	    /* Free the variable.  Don't remove it from the hashtab,
  	     * ht_array might change then.  hash_clear() takes care of it
  	     * later. */
  	    v = HI2DI(hi);
  	    if (free_val)
  		clear_tv(&v->di_tv);
  	    if (v->di_flags & DI_FLAGS_ALLOC)
  		vim_free(v);
  	}
      }
      hash_clear(ht);
      ht->ht_used = 0;
  }
  
  /*
   * Delete a variable from hashtab "ht" at item "hi".
   * Clear the variable value and free the dictitem.
   */
      static void
  delete_var(ht, hi)
      hashtab_T	*ht;
      hashitem_T	*hi;
  {
      dictitem_T	*di = HI2DI(hi);
  
      hash_remove(ht, hi);
      clear_tv(&di->di_tv);
      vim_free(di);
  }
  
  /*
   * List the value of one internal variable.
   */
      static void
  list_one_var(v, prefix, first)
      dictitem_T	*v;
      char_u	*prefix;
      int		*first;
  {
      char_u	*tofree;
      char_u	*s;
      char_u	numbuf[NUMBUFLEN];
  
      current_copyID += COPYID_INC;
      s = echo_string(&v->di_tv, &tofree, numbuf, current_copyID);
      list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
  					 s == NULL ? (char_u *)"" : s, first);
      vim_free(tofree);
  }
  
      static void
  list_one_var_a(prefix, name, type, string, first)
      char_u	*prefix;
      char_u	*name;
      int		type;
      char_u	*string;
      int		*first;  /* when TRUE clear rest of screen and set to FALSE */
  {
      /* don't use msg() or msg_attr() to avoid overwriting "v:statusmsg" */
      msg_start();
      msg_puts(prefix);
      if (name != NULL)	/* "a:" vars don't have a name stored */
  	msg_puts(name);
      msg_putchar(' ');
      msg_advance(22);
      if (type == VAR_NUMBER)
  	msg_putchar('#');
      else if (type == VAR_FUNC)
  	msg_putchar('*');
      else if (type == VAR_LIST)
      {
  	msg_putchar('[');
  	if (*string == '[')
  	    ++string;
      }
      else if (type == VAR_DICT)
      {
  	msg_putchar('{');
  	if (*string == '{')
  	    ++string;
      }
      else
  	msg_putchar(' ');
  
      msg_outtrans(string);
  
      if (type == VAR_FUNC)
  	msg_puts((char_u *)"()");
      if (*first)
      {
  	msg_clr_eos();
  	*first = FALSE;
      }
  }
  
  /*
   * Set variable "name" to value in "tv".
   * If the variable already exists, the value is updated.
   * Otherwise the variable is created.
   */
      static void
  set_var(name, tv, copy)
      char_u	*name;
      typval_T	*tv;
      int		copy;	    /* make copy of value in "tv" */
  {
      dictitem_T	*v;
      char_u	*varname;
      hashtab_T	*ht;
  
      ht = find_var_ht(name, &varname);
      if (ht == NULL || *varname == NUL)
      {
  	EMSG2(_(e_illvar), name);
  	return;
      }
      v = find_var_in_ht(ht, 0, varname, TRUE);
  
      if (tv->v_type == VAR_FUNC && var_check_func_name(name, v == NULL))
  	return;
  
      if (v != NULL)
      {
  	/* existing variable, need to clear the value */
  	if (var_check_ro(v->di_flags, name, FALSE)
  			       || tv_check_lock(v->di_tv.v_lock, name, FALSE))
  	    return;
  	if (v->di_tv.v_type != tv->v_type
  		&& !((v->di_tv.v_type == VAR_STRING
  			|| v->di_tv.v_type == VAR_NUMBER)
  		    && (tv->v_type == VAR_STRING
  			|| tv->v_type == VAR_NUMBER))
  #ifdef FEAT_FLOAT
  		&& !((v->di_tv.v_type == VAR_NUMBER
  			|| v->di_tv.v_type == VAR_FLOAT)
  		    && (tv->v_type == VAR_NUMBER
  			|| tv->v_type == VAR_FLOAT))
  #endif
  		)
  	{
  	    EMSG2(_("E706: Variable type mismatch for: %s"), name);
  	    return;
  	}
  
  	/*
  	 * Handle setting internal v: variables separately where needed to
  	 * prevent changing the type.
  	 */
  	if (ht == &vimvarht)
  	{
  	    if (v->di_tv.v_type == VAR_STRING)
  	    {
  		vim_free(v->di_tv.vval.v_string);
  		if (copy || tv->v_type != VAR_STRING)
  		    v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
  		else
  		{
  		    /* Take over the string to avoid an extra alloc/free. */
  		    v->di_tv.vval.v_string = tv->vval.v_string;
  		    tv->vval.v_string = NULL;
  		}
  		return;
  	    }
  	    else if (v->di_tv.v_type == VAR_NUMBER)
  	    {
  		v->di_tv.vval.v_number = get_tv_number(tv);
  		if (STRCMP(varname, "searchforward") == 0)
  		    set_search_direction(v->di_tv.vval.v_number ? '/' : '?');
  #ifdef FEAT_SEARCH_EXTRA
  		else if (STRCMP(varname, "hlsearch") == 0)
  		{
  		    no_hlsearch = !v->di_tv.vval.v_number;
  		    redraw_all_later(SOME_VALID);
  		}
  #endif
  		return;
  	    }
  	    else if (v->di_tv.v_type != tv->v_type)
  		EMSG2(_(e_intern2), "set_var()");
  	}
  
  	clear_tv(&v->di_tv);
      }
      else		    /* add a new variable */
      {
  	/* Can't add "v:" variable. */
  	if (ht == &vimvarht)
  	{
  	    EMSG2(_(e_illvar), name);
  	    return;
  	}
  
  	/* Make sure the variable name is valid. */
  	if (!valid_varname(varname))
  	    return;
  
  	v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
  							  + STRLEN(varname)));
  	if (v == NULL)
  	    return;
  	STRCPY(v->di_key, varname);
  	if (hash_add(ht, DI2HIKEY(v)) == FAIL)
  	{
  	    vim_free(v);
  	    return;
  	}
  	v->di_flags = DI_FLAGS_ALLOC;
      }
  
      if (copy || tv->v_type == VAR_NUMBER || tv->v_type == VAR_FLOAT)
  	copy_tv(tv, &v->di_tv);
      else
      {
  	v->di_tv = *tv;
  	v->di_tv.v_lock = 0;
  	init_tv(tv);
      }
  }
  
  /*
   * Return TRUE if di_flags "flags" indicates variable "name" is read-only.
   * Also give an error message.
   */
      static int
  var_check_ro(flags, name, use_gettext)
      int		flags;
      char_u	*name;
      int		use_gettext;
  {
      if (flags & DI_FLAGS_RO)
      {
  	EMSG2(_(e_readonlyvar), use_gettext ? (char_u *)_(name) : name);
  	return TRUE;
      }
      if ((flags & DI_FLAGS_RO_SBX) && sandbox)
      {
  	EMSG2(_(e_readonlysbx), use_gettext ? (char_u *)_(name) : name);
  	return TRUE;
      }
      return FALSE;
  }
  
  /*
   * Return TRUE if di_flags "flags" indicates variable "name" is fixed.
   * Also give an error message.
   */
      static int
  var_check_fixed(flags, name, use_gettext)
      int		flags;
      char_u	*name;
      int		use_gettext;
  {
      if (flags & DI_FLAGS_FIX)
      {
  	EMSG2(_("E795: Cannot delete variable %s"),
  				      use_gettext ? (char_u *)_(name) : name);
  	return TRUE;
      }
      return FALSE;
  }
  
  /*
   * Check if a funcref is assigned to a valid variable name.
   * Return TRUE and give an error if not.
   */
      static int
  var_check_func_name(name, new_var)
      char_u *name;    /* points to start of variable name */
      int    new_var;  /* TRUE when creating the variable */
  {
      /* Allow for w: b: s: and t:. */
      if (!(vim_strchr((char_u *)"wbst", name[0]) != NULL && name[1] == ':')
  	    && !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
  						     ? name[2] : name[0]))
      {
  	EMSG2(_("E704: Funcref variable name must start with a capital: %s"),
  									name);
  	return TRUE;
      }
      /* Don't allow hiding a function.  When "v" is not NULL we might be
       * assigning another function to the same var, the type is checked
       * below. */
      if (new_var && function_exists(name))
      {
  	EMSG2(_("E705: Variable name conflicts with existing function: %s"),
  								    name);
  	return TRUE;
      }
      return FALSE;
  }
  
  /*
   * Check if a variable name is valid.
   * Return FALSE and give an error if not.
   */
      static int
  valid_varname(varname)
      char_u *varname;
  {
      char_u *p;
  
      for (p = varname; *p != NUL; ++p)
  	if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p))
  						   && *p != AUTOLOAD_CHAR)
  	{
  	    EMSG2(_(e_illvar), varname);
  	    return FALSE;
  	}
      return TRUE;
  }
  
  /*
   * Return TRUE if typeval "tv" is set to be locked (immutable).
   * Also give an error message, using "name" or _("name") when use_gettext is
   * TRUE.
   */
      static int
  tv_check_lock(lock, name, use_gettext)
      int		lock;
      char_u	*name;
      int		use_gettext;
  {
      if (lock & VAR_LOCKED)
      {
  	EMSG2(_("E741: Value is locked: %s"),
  				name == NULL ? (char_u *)_("Unknown")
  					     : use_gettext ? (char_u *)_(name)
  					     : name);
  	return TRUE;
      }
      if (lock & VAR_FIXED)
      {
  	EMSG2(_("E742: Cannot change value of %s"),
  				name == NULL ? (char_u *)_("Unknown")
  					     : use_gettext ? (char_u *)_(name)
  					     : name);
  	return TRUE;
      }
      return FALSE;
  }
  
  /*
   * Copy the values from typval_T "from" to typval_T "to".
   * When needed allocates string or increases reference count.
   * Does not make a copy of a list or dict but copies the reference!
   * It is OK for "from" and "to" to point to the same item.  This is used to
   * make a copy later.
   */
      void
  copy_tv(from, to)
      typval_T *from;
      typval_T *to;
  {
      to->v_type = from->v_type;
      to->v_lock = 0;
      switch (from->v_type)
      {
  	case VAR_NUMBER:
  	    to->vval.v_number = from->vval.v_number;
  	    break;
  #ifdef FEAT_FLOAT
  	case VAR_FLOAT:
  	    to->vval.v_float = from->vval.v_float;
  	    break;
  #endif
  	case VAR_STRING:
  	case VAR_FUNC:
  	    if (from->vval.v_string == NULL)
  		to->vval.v_string = NULL;
  	    else
  	    {
  		to->vval.v_string = vim_strsave(from->vval.v_string);
  		if (from->v_type == VAR_FUNC)
  		    func_ref(to->vval.v_string);
  	    }
  	    break;
  	case VAR_LIST:
  	    if (from->vval.v_list == NULL)
  		to->vval.v_list = NULL;
  	    else
  	    {
  		to->vval.v_list = from->vval.v_list;
  		++to->vval.v_list->lv_refcount;
  	    }
  	    break;
  	case VAR_DICT:
  	    if (from->vval.v_dict == NULL)
  		to->vval.v_dict = NULL;
  	    else
  	    {
  		to->vval.v_dict = from->vval.v_dict;
  		++to->vval.v_dict->dv_refcount;
  	    }
  	    break;
  	default:
  	    EMSG2(_(e_intern2), "copy_tv()");
  	    break;
      }
  }
  
  /*
   * Make a copy of an item.
   * Lists and Dictionaries are also copied.  A deep copy if "deep" is set.
   * For deepcopy() "copyID" is zero for a full copy or the ID for when a
   * reference to an already copied list/dict can be used.
   * Returns FAIL or OK.
   */
      static int
  item_copy(from, to, deep, copyID)
      typval_T	*from;
      typval_T	*to;
      int		deep;
      int		copyID;
  {
      static int	recurse = 0;
      int		ret = OK;
  
      if (recurse >= DICT_MAXNEST)
      {
  	EMSG(_("E698: variable nested too deep for making a copy"));
  	return FAIL;
      }
      ++recurse;
  
      switch (from->v_type)
      {
  	case VAR_NUMBER:
  #ifdef FEAT_FLOAT
  	case VAR_FLOAT:
  #endif
  	case VAR_STRING:
  	case VAR_FUNC:
  	    copy_tv(from, to);
  	    break;
  	case VAR_LIST:
  	    to->v_type = VAR_LIST;
  	    to->v_lock = 0;
  	    if (from->vval.v_list == NULL)
  		to->vval.v_list = NULL;
  	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
  	    {
  		/* use the copy made earlier */
  		to->vval.v_list = from->vval.v_list->lv_copylist;
  		++to->vval.v_list->lv_refcount;
  	    }
  	    else
  		to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
  	    if (to->vval.v_list == NULL)
  		ret = FAIL;
  	    break;
  	case VAR_DICT:
  	    to->v_type = VAR_DICT;
  	    to->v_lock = 0;
  	    if (from->vval.v_dict == NULL)
  		to->vval.v_dict = NULL;
  	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
  	    {
  		/* use the copy made earlier */
  		to->vval.v_dict = from->vval.v_dict->dv_copydict;
  		++to->vval.v_dict->dv_refcount;
  	    }
  	    else
  		to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
  	    if (to->vval.v_dict == NULL)
  		ret = FAIL;
  	    break;
  	default:
  	    EMSG2(_(e_intern2), "item_copy()");
  	    ret = FAIL;
      }
      --recurse;
      return ret;
  }
  
  /*
   * ":echo expr1 ..."	print each argument separated with a space, add a
   *			newline at the end.
   * ":echon expr1 ..."	print each argument plain.
   */
      void
  ex_echo(eap)
      exarg_T	*eap;
  {
      char_u	*arg = eap->arg;
      typval_T	rettv;
      char_u	*tofree;
      char_u	*p;
      int		needclr = TRUE;
      int		atstart = TRUE;
      char_u	numbuf[NUMBUFLEN];
  
      if (eap->skip)
  	++emsg_skip;
      while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
      {
  	/* If eval1() causes an error message the text from the command may
  	 * still need to be cleared. E.g., "echo 22,44". */
  	need_clr_eos = needclr;
  
  	p = arg;
  	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
  	{
  	    /*
  	     * Report the invalid expression unless the expression evaluation
  	     * has been cancelled due to an aborting error, an interrupt, or an
  	     * exception.
  	     */
  	    if (!aborting())
  		EMSG2(_(e_invexpr2), p);
  	    need_clr_eos = FALSE;
  	    break;
  	}
  	need_clr_eos = FALSE;
  
  	if (!eap->skip)
  	{
  	    if (atstart)
  	    {
  		atstart = FALSE;
  		/* Call msg_start() after eval1(), evaluating the expression
  		 * may cause a message to appear. */
  		if (eap->cmdidx == CMD_echo)
  		{
  		    /* Mark the saved text as finishing the line, so that what
  		     * follows is displayed on a new line when scrolling back
  		     * at the more prompt. */
  		    msg_sb_eol();
  		    msg_start();
  		}
  	    }
  	    else if (eap->cmdidx == CMD_echo)
  		msg_puts_attr((char_u *)" ", echo_attr);
  	    current_copyID += COPYID_INC;
  	    p = echo_string(&rettv, &tofree, numbuf, current_copyID);
  	    if (p != NULL)
  		for ( ; *p != NUL && !got_int; ++p)
  		{
  		    if (*p == '\n' || *p == '\r' || *p == TAB)
  		    {
  			if (*p != TAB && needclr)
  			{
  			    /* remove any text still there from the command */
  			    msg_clr_eos();
  			    needclr = FALSE;
  			}
  			msg_putchar_attr(*p, echo_attr);
  		    }
  		    else
  		    {
  #ifdef FEAT_MBYTE
  			if (has_mbyte)
  			{
  			    int i = (*mb_ptr2len)(p);
  
  			    (void)msg_outtrans_len_attr(p, i, echo_attr);
  			    p += i - 1;
  			}
  			else
  #endif
  			    (void)msg_outtrans_len_attr(p, 1, echo_attr);
  		    }
  		}
  	    vim_free(tofree);
  	}
  	clear_tv(&rettv);
  	arg = skipwhite(arg);
      }
      eap->nextcmd = check_nextcmd(arg);
  
      if (eap->skip)
  	--emsg_skip;
      else
      {
  	/* remove text that may still be there from the command */
  	if (needclr)
  	    msg_clr_eos();
  	if (eap->cmdidx == CMD_echo)
  	    msg_end();
      }
  }
  
  /*
   * ":echohl {name}".
   */
      void
  ex_echohl(eap)
      exarg_T	*eap;
  {
      int		id;
  
      id = syn_name2id(eap->arg);
      if (id == 0)
  	echo_attr = 0;
      else
  	echo_attr = syn_id2attr(id);
  }
  
  /*
   * ":execute expr1 ..."	execute the result of an expression.
   * ":echomsg expr1 ..."	Print a message
   * ":echoerr expr1 ..."	Print an error
   * Each gets spaces around each argument and a newline at the end for
   * echo commands
   */
      void
  ex_execute(eap)
      exarg_T	*eap;
  {
      char_u	*arg = eap->arg;
      typval_T	rettv;
      int		ret = OK;
      char_u	*p;
      garray_T	ga;
      int		len;
      int		save_did_emsg;
  
      ga_init2(&ga, 1, 80);
  
      if (eap->skip)
  	++emsg_skip;
      while (*arg != NUL && *arg != '|' && *arg != '\n')
      {
  	p = arg;
  	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
  	{
  	    /*
  	     * Report the invalid expression unless the expression evaluation
  	     * has been cancelled due to an aborting error, an interrupt, or an
  	     * exception.
  	     */
  	    if (!aborting())
  		EMSG2(_(e_invexpr2), p);
  	    ret = FAIL;
  	    break;
  	}
  
  	if (!eap->skip)
  	{
  	    p = get_tv_string(&rettv);
  	    len = (int)STRLEN(p);
  	    if (ga_grow(&ga, len + 2) == FAIL)
  	    {
  		clear_tv(&rettv);
  		ret = FAIL;
  		break;
  	    }
  	    if (ga.ga_len)
  		((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
  	    STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
  	    ga.ga_len += len;
  	}
  
  	clear_tv(&rettv);
  	arg = skipwhite(arg);
      }
  
      if (ret != FAIL && ga.ga_data != NULL)
      {
  	if (eap->cmdidx == CMD_echomsg)
  	{
  	    MSG_ATTR(ga.ga_data, echo_attr);
  	    out_flush();
  	}
  	else if (eap->cmdidx == CMD_echoerr)
  	{
  	    /* We don't want to abort following commands, restore did_emsg. */
  	    save_did_emsg = did_emsg;
  	    EMSG((char_u *)ga.ga_data);
  	    if (!force_abort)
  		did_emsg = save_did_emsg;
  	}
  	else if (eap->cmdidx == CMD_execute)
  	    do_cmdline((char_u *)ga.ga_data,
  		       eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
      }
  
      ga_clear(&ga);
  
      if (eap->skip)
  	--emsg_skip;
  
      eap->nextcmd = check_nextcmd(arg);
  }
  
  /*
   * Skip over the name of an option: "&option", "&g:option" or "&l:option".
   * "arg" points to the "&" or '+' when called, to "option" when returning.
   * Returns NULL when no option name found.  Otherwise pointer to the char
   * after the option name.
   */
      static char_u *
  find_option_end(arg, opt_flags)
      char_u	**arg;
      int		*opt_flags;
  {
      char_u	*p = *arg;
  
      ++p;
      if (*p == 'g' && p[1] == ':')
      {
  	*opt_flags = OPT_GLOBAL;
  	p += 2;
      }
      else if (*p == 'l' && p[1] == ':')
      {
  	*opt_flags = OPT_LOCAL;
  	p += 2;
      }
      else
  	*opt_flags = 0;
  
      if (!ASCII_ISALPHA(*p))
  	return NULL;
      *arg = p;
  
      if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
  	p += 4;	    /* termcap option */
      else
  	while (ASCII_ISALPHA(*p))
  	    ++p;
      return p;
  }
  
  /*
   * ":function"
   */
      void
  ex_function(eap)
      exarg_T	*eap;
  {
      char_u	*theline;
      int		i;
      int		j;
      int		c;
      int		saved_did_emsg;
      int		saved_wait_return = need_wait_return;
      char_u	*name = NULL;
      char_u	*p;
      char_u	*arg;
      char_u	*line_arg = NULL;
      garray_T	newargs;
      garray_T	newlines;
      int		varargs = FALSE;
      int		mustend = FALSE;
      int		flags = 0;
      ufunc_T	*fp;
      int		indent;
      int		nesting;
      char_u	*skip_until = NULL;
      dictitem_T	*v;
      funcdict_T	fudi;
      static int	func_nr = 0;	    /* number for nameless function */
      int		paren;
      hashtab_T	*ht;
      int		todo;
      hashitem_T	*hi;
      int		sourcing_lnum_off;
  
      /*
       * ":function" without argument: list functions.
       */
      if (ends_excmd(*eap->arg))
      {
  	if (!eap->skip)
  	{
  	    todo = (int)func_hashtab.ht_used;
  	    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
  	    {
  		if (!HASHITEM_EMPTY(hi))
  		{
  		    --todo;
  		    fp = HI2UF(hi);
  		    if (!isdigit(*fp->uf_name))
  			list_func_head(fp, FALSE);
  		}
  	    }
  	}
  	eap->nextcmd = check_nextcmd(eap->arg);
  	return;
      }
  
      /*
       * ":function /pat": list functions matching pattern.
       */
      if (*eap->arg == '/')
      {
  	p = skip_regexp(eap->arg + 1, '/', TRUE, NULL);
  	if (!eap->skip)
  	{
  	    regmatch_T	regmatch;
  
  	    c = *p;
  	    *p = NUL;
  	    regmatch.regprog = vim_regcomp(eap->arg + 1, RE_MAGIC);
  	    *p = c;
  	    if (regmatch.regprog != NULL)
  	    {
  		regmatch.rm_ic = p_ic;
  
  		todo = (int)func_hashtab.ht_used;
  		for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
  		{
  		    if (!HASHITEM_EMPTY(hi))
  		    {
  			--todo;
  			fp = HI2UF(hi);
  			if (!isdigit(*fp->uf_name)
  				    && vim_regexec(&regmatch, fp->uf_name, 0))
  			    list_func_head(fp, FALSE);
  		    }
  		}
  		vim_regfree(regmatch.regprog);
  	    }
  	}
  	if (*p == '/')
  	    ++p;
  	eap->nextcmd = check_nextcmd(p);
  	return;
      }
  
      /*
       * Get the function name.  There are these situations:
       * func	    normal function name
       *		    "name" == func, "fudi.fd_dict" == NULL
       * dict.func    new dictionary entry
       *		    "name" == NULL, "fudi.fd_dict" set,
       *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
       * dict.func    existing dict entry with a Funcref
       *		    "name" == func, "fudi.fd_dict" set,
       *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
       * dict.func    existing dict entry that's not a Funcref
       *		    "name" == NULL, "fudi.fd_dict" set,
       *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
       * s:func	    script-local function name
       * g:func	    global function name, same as "func"
       */
      p = eap->arg;
      name = trans_function_name(&p, eap->skip, 0, &fudi);
      paren = (vim_strchr(p, '(') != NULL);
      if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
      {
  	/*
  	 * Return on an invalid expression in braces, unless the expression
  	 * evaluation has been cancelled due to an aborting error, an
  	 * interrupt, or an exception.
  	 */
  	if (!aborting())
  	{
  	    if (!eap->skip && fudi.fd_newkey != NULL)
  		EMSG2(_(e_dictkey), fudi.fd_newkey);
  	    vim_free(fudi.fd_newkey);
  	    return;
  	}
  	else
  	    eap->skip = TRUE;
      }
  
      /* An error in a function call during evaluation of an expression in magic
       * braces should not cause the function not to be defined. */
      saved_did_emsg = did_emsg;
      did_emsg = FALSE;
  
      /*
       * ":function func" with only function name: list function.
       */
      if (!paren)
      {
  	if (!ends_excmd(*skipwhite(p)))
  	{
  	    EMSG(_(e_trailing));
  	    goto ret_free;
  	}
  	eap->nextcmd = check_nextcmd(p);
  	if (eap->nextcmd != NULL)
  	    *p = NUL;
  	if (!eap->skip && !got_int)
  	{
  	    fp = find_func(name);
  	    if (fp != NULL)
  	    {
  		list_func_head(fp, TRUE);
  		for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
  		{
  		    if (FUNCLINE(fp, j) == NULL)
  			continue;
  		    msg_putchar('\n');
  		    msg_outnum((long)(j + 1));
  		    if (j < 9)
  			msg_putchar(' ');
  		    if (j < 99)
  			msg_putchar(' ');
  		    msg_prt_line(FUNCLINE(fp, j), FALSE);
  		    out_flush();	/* show a line at a time */
  		    ui_breakcheck();
  		}
  		if (!got_int)
  		{
  		    msg_putchar('\n');
  		    msg_puts((char_u *)"   endfunction");
  		}
  	    }
  	    else
  		emsg_funcname(N_("E123: Undefined function: %s"), name);
  	}
  	goto ret_free;
      }
  
      /*
       * ":function name(arg1, arg2)" Define function.
       */
      p = skipwhite(p);
      if (*p != '(')
      {
  	if (!eap->skip)
  	{
  	    EMSG2(_("E124: Missing '(': %s"), eap->arg);
  	    goto ret_free;
  	}
  	/* attempt to continue by skipping some text */
  	if (vim_strchr(p, '(') != NULL)
  	    p = vim_strchr(p, '(');
      }
      p = skipwhite(p + 1);
  
      ga_init2(&newargs, (int)sizeof(char_u *), 3);
      ga_init2(&newlines, (int)sizeof(char_u *), 3);
  
      if (!eap->skip)
      {
  	/* Check the name of the function.  Unless it's a dictionary function
  	 * (that we are overwriting). */
  	if (name != NULL)
  	    arg = name;
  	else
  	    arg = fudi.fd_newkey;
  	if (arg != NULL && (fudi.fd_di == NULL
  				     || fudi.fd_di->di_tv.v_type != VAR_FUNC))
  	{
  	    if (*arg == K_SPECIAL)
  		j = 3;
  	    else
  		j = 0;
  	    while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j])
  						      : eval_isnamec(arg[j])))
  		++j;
  	    if (arg[j] != NUL)
  		emsg_funcname((char *)e_invarg2, arg);
  	}
  	/* Disallow using the g: dict. */
  	if (fudi.fd_dict != NULL && fudi.fd_dict->dv_scope == VAR_DEF_SCOPE)
  	    EMSG(_("E862: Cannot use g: here"));
      }
  
      /*
       * Isolate the arguments: "arg1, arg2, ...)"
       */
      while (*p != ')')
      {
  	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
  	{
  	    varargs = TRUE;
  	    p += 3;
  	    mustend = TRUE;
  	}
  	else
  	{
  	    arg = p;
  	    while (ASCII_ISALNUM(*p) || *p == '_')
  		++p;
  	    if (arg == p || isdigit(*arg)
  		    || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
  		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))
  	    {
  		if (!eap->skip)
  		    EMSG2(_("E125: Illegal argument: %s"), arg);
  		break;
  	    }
  	    if (ga_grow(&newargs, 1) == FAIL)
  		goto erret;
  	    c = *p;
  	    *p = NUL;
  	    arg = vim_strsave(arg);
  	    if (arg == NULL)
  		goto erret;
  
  	    /* Check for duplicate argument name. */
  	    for (i = 0; i < newargs.ga_len; ++i)
  		if (STRCMP(((char_u **)(newargs.ga_data))[i], arg) == 0)
  		{
  		    EMSG2(_("E853: Duplicate argument name: %s"), arg);
  		    vim_free(arg);
  		    goto erret;
  		}
  
  	    ((char_u **)(newargs.ga_data))[newargs.ga_len] = arg;
  	    *p = c;
  	    newargs.ga_len++;
  	    if (*p == ',')
  		++p;
  	    else
  		mustend = TRUE;
  	}
  	p = skipwhite(p);
  	if (mustend && *p != ')')
  	{
  	    if (!eap->skip)
  		EMSG2(_(e_invarg2), eap->arg);
  	    break;
  	}
      }
      ++p;	/* skip the ')' */
  
      /* find extra arguments "range", "dict" and "abort" */
      for (;;)
      {
  	p = skipwhite(p);
  	if (STRNCMP(p, "range", 5) == 0)
  	{
  	    flags |= FC_RANGE;
  	    p += 5;
  	}
  	else if (STRNCMP(p, "dict", 4) == 0)
  	{
  	    flags |= FC_DICT;
  	    p += 4;
  	}
  	else if (STRNCMP(p, "abort", 5) == 0)
  	{
  	    flags |= FC_ABORT;
  	    p += 5;
  	}
  	else
  	    break;
      }
  
      /* When there is a line break use what follows for the function body.
       * Makes 'exe "func Test()\n...\nendfunc"' work. */
      if (*p == '\n')
  	line_arg = p + 1;
      else if (*p != NUL && *p != '"' && !eap->skip && !did_emsg)
  	EMSG(_(e_trailing));
  
      /*
       * Read the body of the function, until ":endfunction" is found.
       */
      if (KeyTyped)
      {
  	/* Check if the function already exists, don't let the user type the
  	 * whole function before telling him it doesn't work!  For a script we
  	 * need to skip the body to be able to find what follows. */
  	if (!eap->skip && !eap->forceit)
  	{
  	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
  		EMSG(_(e_funcdict));
  	    else if (name != NULL && find_func(name) != NULL)
  		emsg_funcname(e_funcexts, name);
  	}
  
  	if (!eap->skip && did_emsg)
  	    goto erret;
  
  	msg_putchar('\n');	    /* don't overwrite the function name */
  	cmdline_row = msg_row;
      }
  
      indent = 2;
      nesting = 0;
      for (;;)
      {
  	if (KeyTyped)
  	{
  	    msg_scroll = TRUE;
  	    saved_wait_return = FALSE;
  	}
  	need_wait_return = FALSE;
  	sourcing_lnum_off = sourcing_lnum;
  
  	if (line_arg != NULL)
  	{
  	    /* Use eap->arg, split up in parts by line breaks. */
  	    theline = line_arg;
  	    p = vim_strchr(theline, '\n');
  	    if (p == NULL)
  		line_arg += STRLEN(line_arg);
  	    else
  	    {
  		*p = NUL;
  		line_arg = p + 1;
  	    }
  	}
  	else if (eap->getline == NULL)
  	    theline = getcmdline(':', 0L, indent);
  	else
  	    theline = eap->getline(':', eap->cookie, indent);
  	if (KeyTyped)
  	    lines_left = Rows - 1;
  	if (theline == NULL)
  	{
  	    EMSG(_("E126: Missing :endfunction"));
  	    goto erret;
  	}
  
  	/* Detect line continuation: sourcing_lnum increased more than one. */
  	if (sourcing_lnum > sourcing_lnum_off + 1)
  	    sourcing_lnum_off = sourcing_lnum - sourcing_lnum_off - 1;
  	else
  	    sourcing_lnum_off = 0;
  
  	if (skip_until != NULL)
  	{
  	    /* between ":append" and "." and between ":python <<EOF" and "EOF"
  	     * don't check for ":endfunc". */
  	    if (STRCMP(theline, skip_until) == 0)
  	    {
  		vim_free(skip_until);
  		skip_until = NULL;
  	    }
  	}
  	else
  	{
  	    /* skip ':' and blanks*/
  	    for (p = theline; vim_iswhite(*p) || *p == ':'; ++p)
  		;
  
  	    /* Check for "endfunction". */
  	    if (checkforcmd(&p, "endfunction", 4) && nesting-- == 0)
  	    {
  		if (line_arg == NULL)
  		    vim_free(theline);
  		break;
  	    }
  
  	    /* Increase indent inside "if", "while", "for" and "try", decrease
  	     * at "end". */
  	    if (indent > 2 && STRNCMP(p, "end", 3) == 0)
  		indent -= 2;
  	    else if (STRNCMP(p, "if", 2) == 0
  		    || STRNCMP(p, "wh", 2) == 0
  		    || STRNCMP(p, "for", 3) == 0
  		    || STRNCMP(p, "try", 3) == 0)
  		indent += 2;
  
  	    /* Check for defining a function inside this function. */
  	    if (checkforcmd(&p, "function", 2))
  	    {
  		if (*p == '!')
  		    p = skipwhite(p + 1);
  		p += eval_fname_script(p);
  		vim_free(trans_function_name(&p, TRUE, 0, NULL));
  		if (*skipwhite(p) == '(')
  		{
  		    ++nesting;
  		    indent += 2;
  		}
  	    }
  
  	    /* Check for ":append" or ":insert". */
  	    p = skip_range(p, NULL);
  	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
  		    || (p[0] == 'i'
  			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
  				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))
  		skip_until = vim_strsave((char_u *)".");
  
  	    /* Check for ":python <<EOF", ":tcl <<EOF", etc. */
  	    arg = skipwhite(skiptowhite(p));
  	    if (arg[0] == '<' && arg[1] =='<'
  		    && ((p[0] == 'p' && p[1] == 'y'
  				    && (!ASCII_ISALPHA(p[2]) || p[2] == 't'))
  			|| (p[0] == 'p' && p[1] == 'e'
  				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
  			|| (p[0] == 't' && p[1] == 'c'
  				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
  			|| (p[0] == 'l' && p[1] == 'u' && p[2] == 'a'
  				    && !ASCII_ISALPHA(p[3]))
  			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
  				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
  			|| (p[0] == 'm' && p[1] == 'z'
  				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
  			))
  	    {
  		/* ":python <<" continues until a dot, like ":append" */
  		p = skipwhite(arg + 2);
  		if (*p == NUL)
  		    skip_until = vim_strsave((char_u *)".");
  		else
  		    skip_until = vim_strsave(p);
  	    }
  	}
  
  	/* Add the line to the function. */
  	if (ga_grow(&newlines, 1 + sourcing_lnum_off) == FAIL)
  	{
  	    if (line_arg == NULL)
  		vim_free(theline);
  	    goto erret;
  	}
  
  	/* Copy the line to newly allocated memory.  get_one_sourceline()
  	 * allocates 250 bytes per line, this saves 80% on average.  The cost
  	 * is an extra alloc/free. */
  	p = vim_strsave(theline);
  	if (p != NULL)
  	{
  	    if (line_arg == NULL)
  		vim_free(theline);
  	    theline = p;
  	}
  
  	((char_u **)(newlines.ga_data))[newlines.ga_len++] = theline;
  
  	/* Add NULL lines for continuation lines, so that the line count is
  	 * equal to the index in the growarray.   */
  	while (sourcing_lnum_off-- > 0)
  	    ((char_u **)(newlines.ga_data))[newlines.ga_len++] = NULL;
  
  	/* Check for end of eap->arg. */
  	if (line_arg != NULL && *line_arg == NUL)
  	    line_arg = NULL;
      }
  
      /* Don't define the function when skipping commands or when an error was
       * detected. */
      if (eap->skip || did_emsg)
  	goto erret;
  
      /*
       * If there are no errors, add the function
       */
      if (fudi.fd_dict == NULL)
      {
  	v = find_var(name, &ht, FALSE);
  	if (v != NULL && v->di_tv.v_type == VAR_FUNC)
  	{
  	    emsg_funcname(N_("E707: Function name conflicts with variable: %s"),
  									name);
  	    goto erret;
  	}
  
  	fp = find_func(name);
  	if (fp != NULL)
  	{
  	    if (!eap->forceit)
  	    {
  		emsg_funcname(e_funcexts, name);
  		goto erret;
  	    }
  	    if (fp->uf_calls > 0)
  	    {
  		emsg_funcname(N_("E127: Cannot redefine function %s: It is in use"),
  									name);
  		goto erret;
  	    }
  	    /* redefine existing function */
  	    ga_clear_strings(&(fp->uf_args));
  	    ga_clear_strings(&(fp->uf_lines));
  	    vim_free(name);
  	    name = NULL;
  	}
      }
      else
      {
  	char	numbuf[20];
  
  	fp = NULL;
  	if (fudi.fd_newkey == NULL && !eap->forceit)
  	{
  	    EMSG(_(e_funcdict));
  	    goto erret;
  	}
  	if (fudi.fd_di == NULL)
  	{
  	    /* Can't add a function to a locked dictionary */
  	    if (tv_check_lock(fudi.fd_dict->dv_lock, eap->arg, FALSE))
  		goto erret;
  	}
  	    /* Can't change an existing function if it is locked */
  	else if (tv_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg, FALSE))
  	    goto erret;
  
  	/* Give the function a sequential number.  Can only be used with a
  	 * Funcref! */
  	vim_free(name);
  	sprintf(numbuf, "%d", ++func_nr);
  	name = vim_strsave((char_u *)numbuf);
  	if (name == NULL)
  	    goto erret;
      }
  
      if (fp == NULL)
      {
  	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
  	{
  	    int	    slen, plen;
  	    char_u  *scriptname;
  
  	    /* Check that the autoload name matches the script name. */
  	    j = FAIL;
  	    if (sourcing_name != NULL)
  	    {
  		scriptname = autoload_name(name);
  		if (scriptname != NULL)
  		{
  		    p = vim_strchr(scriptname, '/');
  		    plen = (int)STRLEN(p);
  		    slen = (int)STRLEN(sourcing_name);
  		    if (slen > plen && fnamecmp(p,
  					    sourcing_name + slen - plen) == 0)
  			j = OK;
  		    vim_free(scriptname);
  		}
  	    }
  	    if (j == FAIL)
  	    {
  		EMSG2(_("E746: Function name does not match script file name: %s"), name);
  		goto erret;
  	    }
  	}
  
  	fp = (ufunc_T *)alloc((unsigned)(sizeof(ufunc_T) + STRLEN(name)));
  	if (fp == NULL)
  	    goto erret;
  
  	if (fudi.fd_dict != NULL)
  	{
  	    if (fudi.fd_di == NULL)
  	    {
  		/* add new dict entry */
  		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
  		if (fudi.fd_di == NULL)
  		{
  		    vim_free(fp);
  		    goto erret;
  		}
  		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
  		{
  		    vim_free(fudi.fd_di);
  		    vim_free(fp);
  		    goto erret;
  		}
  	    }
  	    else
  		/* overwrite existing dict entry */
  		clear_tv(&fudi.fd_di->di_tv);
  	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
  	    fudi.fd_di->di_tv.v_lock = 0;
  	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
  	    fp->uf_refcount = 1;
  
  	    /* behave like "dict" was used */
  	    flags |= FC_DICT;
  	}
  
  	/* insert the new function in the function list */
  	STRCPY(fp->uf_name, name);
  	hash_add(&func_hashtab, UF2HIKEY(fp));
      }
      fp->uf_args = newargs;
      fp->uf_lines = newlines;
  #ifdef FEAT_PROFILE
      fp->uf_tml_count = NULL;
      fp->uf_tml_total = NULL;
      fp->uf_tml_self = NULL;
      fp->uf_profiling = FALSE;
      if (prof_def_func())
  	func_do_profile(fp);
  #endif
      fp->uf_varargs = varargs;
      fp->uf_flags = flags;
      fp->uf_calls = 0;
      fp->uf_script_ID = current_SID;
      goto ret_free;
  
  erret:
      ga_clear_strings(&newargs);
      ga_clear_strings(&newlines);
  ret_free:
      vim_free(skip_until);
      vim_free(fudi.fd_newkey);
      vim_free(name);
      did_emsg |= saved_did_emsg;
      need_wait_return |= saved_wait_return;
  }
  
  /*
   * Get a function name, translating "<SID>" and "<SNR>".
   * Also handles a Funcref in a List or Dictionary.
   * Returns the function name in allocated memory, or NULL for failure.
   * flags:
   * TFN_INT:         internal function name OK
   * TFN_QUIET:       be quiet
   * TFN_NO_AUTOLOAD: do not use script autoloading
   * Advances "pp" to just after the function name (if no error).
   */
      static char_u *
  trans_function_name(pp, skip, flags, fdp)
      char_u	**pp;
      int		skip;		/* only find the end, don't evaluate */
      int		flags;
      funcdict_T	*fdp;		/* return: info about dictionary used */
  {
      char_u	*name = NULL;
      char_u	*start;
      char_u	*end;
      int		lead;
      char_u	sid_buf[20];
      int		len;
      lval_T	lv;
  
      if (fdp != NULL)
  	vim_memset(fdp, 0, sizeof(funcdict_T));
      start = *pp;
  
      /* Check for hard coded <SNR>: already translated function ID (from a user
       * command). */
      if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
  						   && (*pp)[2] == (int)KE_SNR)
      {
  	*pp += 3;
  	len = get_id_len(pp) + 3;
  	return vim_strnsave(start, len);
      }
  
      /* A name starting with "<SID>" or "<SNR>" is local to a script.  But
       * don't skip over "s:", get_lval() needs it for "s:dict.func". */
      lead = eval_fname_script(start);
      if (lead > 2)
  	start += lead;
  
      /* Note that TFN_ flags use the same values as GLV_ flags. */
      end = get_lval(start, NULL, &lv, FALSE, skip, flags,
  					      lead > 2 ? 0 : FNE_CHECK_START);
      if (end == start)
      {
  	if (!skip)
  	    EMSG(_("E129: Function name required"));
  	goto theend;
      }
      if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
      {
  	/*
  	 * Report an invalid expression in braces, unless the expression
  	 * evaluation has been cancelled due to an aborting error, an
  	 * interrupt, or an exception.
  	 */
  	if (!aborting())
  	{
  	    if (end != NULL)
  		EMSG2(_(e_invarg2), start);
  	}
  	else
  	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
  	goto theend;
      }
  
      if (lv.ll_tv != NULL)
      {
  	if (fdp != NULL)
  	{
  	    fdp->fd_dict = lv.ll_dict;
  	    fdp->fd_newkey = lv.ll_newkey;
  	    lv.ll_newkey = NULL;
  	    fdp->fd_di = lv.ll_di;
  	}
  	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
  	{
  	    name = vim_strsave(lv.ll_tv->vval.v_string);
  	    *pp = end;
  	}
  	else
  	{
  	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
  			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
  		EMSG(_(e_funcref));
  	    else
  		*pp = end;
  	    name = NULL;
  	}
  	goto theend;
      }
  
      if (lv.ll_name == NULL)
      {
  	/* Error found, but continue after the function name. */
  	*pp = end;
  	goto theend;
      }
  
      /* Check if the name is a Funcref.  If so, use the value. */
      if (lv.ll_exp_name != NULL)
      {
  	len = (int)STRLEN(lv.ll_exp_name);
  	name = deref_func_name(lv.ll_exp_name, &len, flags & TFN_NO_AUTOLOAD);
  	if (name == lv.ll_exp_name)
  	    name = NULL;
      }
      else
      {
  	len = (int)(end - *pp);
  	name = deref_func_name(*pp, &len, flags & TFN_NO_AUTOLOAD);
  	if (name == *pp)
  	    name = NULL;
      }
      if (name != NULL)
      {
  	name = vim_strsave(name);
  	*pp = end;
  	if (STRNCMP(name, "<SNR>", 5) == 0)
  	{
  	    /* Change "<SNR>" to the byte sequence. */
  	    name[0] = K_SPECIAL;
  	    name[1] = KS_EXTRA;
  	    name[2] = (int)KE_SNR;
  	    mch_memmove(name + 3, name + 5, STRLEN(name + 5) + 1);
  	}
  	goto theend;
      }
  
      if (lv.ll_exp_name != NULL)
      {
  	len = (int)STRLEN(lv.ll_exp_name);
  	if (lead <= 2 && lv.ll_name == lv.ll_exp_name
  					 && STRNCMP(lv.ll_name, "s:", 2) == 0)
  	{
  	    /* When there was "s:" already or the name expanded to get a
  	     * leading "s:" then remove it. */
  	    lv.ll_name += 2;
  	    len -= 2;
  	    lead = 2;
  	}
      }
      else
      {
  	/* skip over "s:" and "g:" */
  	if (lead == 2 || (lv.ll_name[0] == 'g' && lv.ll_name[1] == ':'))
  	    lv.ll_name += 2;
  	len = (int)(end - lv.ll_name);
      }
  
      /*
       * Copy the function name to allocated memory.
       * Accept <SID>name() inside a script, translate into <SNR>123_name().
       * Accept <SNR>123_name() outside a script.
       */
      if (skip)
  	lead = 0;	/* do nothing */
      else if (lead > 0)
      {
  	lead = 3;
  	if ((lv.ll_exp_name != NULL && eval_fname_sid(lv.ll_exp_name))
  						       || eval_fname_sid(*pp))
  	{
  	    /* It's "s:" or "<SID>" */
  	    if (current_SID <= 0)
  	    {
  		EMSG(_(e_usingsid));
  		goto theend;
  	    }
  	    sprintf((char *)sid_buf, "%ld_", (long)current_SID);
  	    lead += (int)STRLEN(sid_buf);
  	}
      }
      else if (!(flags & TFN_INT) && builtin_function(lv.ll_name, len))
      {
  	EMSG2(_("E128: Function name must start with a capital or \"s:\": %s"),
  								       start);
  	goto theend;
      }
      if (!skip && !(flags & TFN_QUIET))
      {
  	char_u *cp = vim_strchr(lv.ll_name, ':');
  
  	if (cp != NULL && cp < end)
  	{
  	    EMSG2(_("E884: Function name cannot contain a colon: %s"), start);
  	    goto theend;
  	}
      }
  
      name = alloc((unsigned)(len + lead + 1));
      if (name != NULL)
      {
  	if (lead > 0)
  	{
  	    name[0] = K_SPECIAL;
  	    name[1] = KS_EXTRA;
  	    name[2] = (int)KE_SNR;
  	    if (lead > 3)	/* If it's "<SID>" */
  		STRCPY(name + 3, sid_buf);
  	}
  	mch_memmove(name + lead, lv.ll_name, (size_t)len);
  	name[lead + len] = NUL;
      }
      *pp = end;
  
  theend:
      clear_lval(&lv);
      return name;
  }
  
  /*
   * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
   * Return 2 if "p" starts with "s:".
   * Return 0 otherwise.
   */
      static int
  eval_fname_script(p)
      char_u	*p;
  {
      if (p[0] == '<' && (STRNICMP(p + 1, "SID>", 4) == 0
  					  || STRNICMP(p + 1, "SNR>", 4) == 0))
  	return 5;
      if (p[0] == 's' && p[1] == ':')
  	return 2;
      return 0;
  }
  
  /*
   * Return TRUE if "p" starts with "<SID>" or "s:".
   * Only works if eval_fname_script() returned non-zero for "p"!
   */
      static int
  eval_fname_sid(p)
      char_u	*p;
  {
      return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
  }
  
  /*
   * List the head of the function: "name(arg1, arg2)".
   */
      static void
  list_func_head(fp, indent)
      ufunc_T	*fp;
      int		indent;
  {
      int		j;
  
      msg_start();
      if (indent)
  	MSG_PUTS("   ");
      MSG_PUTS("function ");
      if (fp->uf_name[0] == K_SPECIAL)
      {
  	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
  	msg_puts(fp->uf_name + 3);
      }
      else
  	msg_puts(fp->uf_name);
      msg_putchar('(');
      for (j = 0; j < fp->uf_args.ga_len; ++j)
      {
  	if (j)
  	    MSG_PUTS(", ");
  	msg_puts(FUNCARG(fp, j));
      }
      if (fp->uf_varargs)
      {
  	if (j)
  	    MSG_PUTS(", ");
  	MSG_PUTS("...");
      }
      msg_putchar(')');
      if (fp->uf_flags & FC_ABORT)
  	MSG_PUTS(" abort");
      if (fp->uf_flags & FC_RANGE)
  	MSG_PUTS(" range");
      if (fp->uf_flags & FC_DICT)
  	MSG_PUTS(" dict");
      msg_clr_eos();
      if (p_verbose > 0)
  	last_set_msg(fp->uf_script_ID);
  }
  
  /*
   * Find a function by name, return pointer to it in ufuncs.
   * Return NULL for unknown function.
   */
      static ufunc_T *
  find_func(name)
      char_u	*name;
  {
      hashitem_T	*hi;
  
      hi = hash_find(&func_hashtab, name);
      if (!HASHITEM_EMPTY(hi))
  	return HI2UF(hi);
      return NULL;
  }
  
  #if defined(EXITFREE) || defined(PROTO)
      void
  free_all_functions()
  {
      hashitem_T	*hi;
  
      /* Need to start all over every time, because func_free() may change the
       * hash table. */
      while (func_hashtab.ht_used > 0)
  	for (hi = func_hashtab.ht_array; ; ++hi)
  	    if (!HASHITEM_EMPTY(hi))
  	    {
  		func_free(HI2UF(hi));
  		break;
  	    }
  }
  #endif
  
      int
  translated_function_exists(name)
      char_u	*name;
  {
      if (builtin_function(name, -1))
  	return find_internal_func(name) >= 0;
      return find_func(name) != NULL;
  }
  
  /*
   * Return TRUE if a function "name" exists.
   */
      static int
  function_exists(name)
      char_u *name;
  {
      char_u  *nm = name;
      char_u  *p;
      int	    n = FALSE;
  
      p = trans_function_name(&nm, FALSE, TFN_INT|TFN_QUIET|TFN_NO_AUTOLOAD,
  			    NULL);
      nm = skipwhite(nm);
  
      /* Only accept "funcname", "funcname ", "funcname (..." and
       * "funcname(...", not "funcname!...". */
      if (p != NULL && (*nm == NUL || *nm == '('))
  	n = translated_function_exists(p);
      vim_free(p);
      return n;
  }
  
      char_u *
  get_expanded_name(name, check)
      char_u	*name;
      int		check;
  {
      char_u	*nm = name;
      char_u	*p;
  
      p = trans_function_name(&nm, FALSE, TFN_INT|TFN_QUIET, NULL);
  
      if (p != NULL && *nm == NUL)
  	if (!check || translated_function_exists(p))
  	    return p;
  
      vim_free(p);
      return NULL;
  }
  
  /*
   * Return TRUE if "name" looks like a builtin function name: starts with a
   * lower case letter and doesn't contain AUTOLOAD_CHAR.
   * "len" is the length of "name", or -1 for NUL terminated.
   */
      static int
  builtin_function(name, len)
      char_u *name;
      int len;
  {
      char_u *p;
  
      if (!ASCII_ISLOWER(name[0]))
  	return FALSE;
      p = vim_strchr(name, AUTOLOAD_CHAR);
      return p == NULL || (len > 0 && p > name + len);
  }
  
  #if defined(FEAT_PROFILE) || defined(PROTO)
  /*
   * Start profiling function "fp".
   */
      static void
  func_do_profile(fp)
      ufunc_T	*fp;
  {
      int		len = fp->uf_lines.ga_len;
  
      if (len == 0)
  	len = 1;  /* avoid getting error for allocating zero bytes */
      fp->uf_tm_count = 0;
      profile_zero(&fp->uf_tm_self);
      profile_zero(&fp->uf_tm_total);
      if (fp->uf_tml_count == NULL)
  	fp->uf_tml_count = (int *)alloc_clear((unsigned) (sizeof(int) * len));
      if (fp->uf_tml_total == NULL)
  	fp->uf_tml_total = (proftime_T *)alloc_clear((unsigned)
  						  (sizeof(proftime_T) * len));
      if (fp->uf_tml_self == NULL)
  	fp->uf_tml_self = (proftime_T *)alloc_clear((unsigned)
  						  (sizeof(proftime_T) * len));
      fp->uf_tml_idx = -1;
      if (fp->uf_tml_count == NULL || fp->uf_tml_total == NULL
  						   || fp->uf_tml_self == NULL)
  	return;	    /* out of memory */
  
      fp->uf_profiling = TRUE;
  }
  
  /*
   * Dump the profiling results for all functions in file "fd".
   */
      void
  func_dump_profile(fd)
      FILE    *fd;
  {
      hashitem_T	*hi;
      int		todo;
      ufunc_T	*fp;
      int		i;
      ufunc_T	**sorttab;
      int		st_len = 0;
  
      todo = (int)func_hashtab.ht_used;
      if (todo == 0)
  	return;     /* nothing to dump */
  
      sorttab = (ufunc_T **)alloc((unsigned)(sizeof(ufunc_T *) * todo));
  
      for (hi = func_hashtab.ht_array; todo > 0; ++hi)
      {
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    --todo;
  	    fp = HI2UF(hi);
  	    if (fp->uf_profiling)
  	    {
  		if (sorttab != NULL)
  		    sorttab[st_len++] = fp;
  
  		if (fp->uf_name[0] == K_SPECIAL)
  		    fprintf(fd, "FUNCTION  <SNR>%s()\n", fp->uf_name + 3);
  		else
  		    fprintf(fd, "FUNCTION  %s()\n", fp->uf_name);
  		if (fp->uf_tm_count == 1)
  		    fprintf(fd, "Called 1 time\n");
  		else
  		    fprintf(fd, "Called %d times\n", fp->uf_tm_count);
  		fprintf(fd, "Total time: %s\n", profile_msg(&fp->uf_tm_total));
  		fprintf(fd, " Self time: %s\n", profile_msg(&fp->uf_tm_self));
  		fprintf(fd, "\n");
  		fprintf(fd, "count  total (s)   self (s)\n");
  
  		for (i = 0; i < fp->uf_lines.ga_len; ++i)
  		{
  		    if (FUNCLINE(fp, i) == NULL)
  			continue;
  		    prof_func_line(fd, fp->uf_tml_count[i],
  			     &fp->uf_tml_total[i], &fp->uf_tml_self[i], TRUE);
  		    fprintf(fd, "%s\n", FUNCLINE(fp, i));
  		}
  		fprintf(fd, "\n");
  	    }
  	}
      }
  
      if (sorttab != NULL && st_len > 0)
      {
  	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
  							      prof_total_cmp);
  	prof_sort_list(fd, sorttab, st_len, "TOTAL", FALSE);
  	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
  							      prof_self_cmp);
  	prof_sort_list(fd, sorttab, st_len, "SELF", TRUE);
      }
  
      vim_free(sorttab);
  }
  
      static void
  prof_sort_list(fd, sorttab, st_len, title, prefer_self)
      FILE	*fd;
      ufunc_T	**sorttab;
      int		st_len;
      char	*title;
      int		prefer_self;	/* when equal print only self time */
  {
      int		i;
      ufunc_T	*fp;
  
      fprintf(fd, "FUNCTIONS SORTED ON %s TIME\n", title);
      fprintf(fd, "count  total (s)   self (s)  function\n");
      for (i = 0; i < 20 && i < st_len; ++i)
      {
  	fp = sorttab[i];
  	prof_func_line(fd, fp->uf_tm_count, &fp->uf_tm_total, &fp->uf_tm_self,
  								 prefer_self);
  	if (fp->uf_name[0] == K_SPECIAL)
  	    fprintf(fd, " <SNR>%s()\n", fp->uf_name + 3);
  	else
  	    fprintf(fd, " %s()\n", fp->uf_name);
      }
      fprintf(fd, "\n");
  }
  
  /*
   * Print the count and times for one function or function line.
   */
      static void
  prof_func_line(fd, count, total, self, prefer_self)
      FILE	*fd;
      int		count;
      proftime_T	*total;
      proftime_T	*self;
      int		prefer_self;	/* when equal print only self time */
  {
      if (count > 0)
      {
  	fprintf(fd, "%5d ", count);
  	if (prefer_self && profile_equal(total, self))
  	    fprintf(fd, "           ");
  	else
  	    fprintf(fd, "%s ", profile_msg(total));
  	if (!prefer_self && profile_equal(total, self))
  	    fprintf(fd, "           ");
  	else
  	    fprintf(fd, "%s ", profile_msg(self));
      }
      else
  	fprintf(fd, "                            ");
  }
  
  /*
   * Compare function for total time sorting.
   */
      static int
  #ifdef __BORLANDC__
  _RTLENTRYF
  #endif
  prof_total_cmp(s1, s2)
      const void	*s1;
      const void	*s2;
  {
      ufunc_T	*p1, *p2;
  
      p1 = *(ufunc_T **)s1;
      p2 = *(ufunc_T **)s2;
      return profile_cmp(&p1->uf_tm_total, &p2->uf_tm_total);
  }
  
  /*
   * Compare function for self time sorting.
   */
      static int
  #ifdef __BORLANDC__
  _RTLENTRYF
  #endif
  prof_self_cmp(s1, s2)
      const void	*s1;
      const void	*s2;
  {
      ufunc_T	*p1, *p2;
  
      p1 = *(ufunc_T **)s1;
      p2 = *(ufunc_T **)s2;
      return profile_cmp(&p1->uf_tm_self, &p2->uf_tm_self);
  }
  
  #endif
  
  /*
   * If "name" has a package name try autoloading the script for it.
   * Return TRUE if a package was loaded.
   */
      static int
  script_autoload(name, reload)
      char_u	*name;
      int		reload;	    /* load script again when already loaded */
  {
      char_u	*p;
      char_u	*scriptname, *tofree;
      int		ret = FALSE;
      int		i;
  
      /* If there is no '#' after name[0] there is no package name. */
      p = vim_strchr(name, AUTOLOAD_CHAR);
      if (p == NULL || p == name)
  	return FALSE;
  
      tofree = scriptname = autoload_name(name);
  
      /* Find the name in the list of previously loaded package names.  Skip
       * "autoload/", it's always the same. */
      for (i = 0; i < ga_loaded.ga_len; ++i)
  	if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
  	    break;
      if (!reload && i < ga_loaded.ga_len)
  	ret = FALSE;	    /* was loaded already */
      else
      {
  	/* Remember the name if it wasn't loaded already. */
  	if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
  	{
  	    ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
  	    tofree = NULL;
  	}
  
  	/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
  	if (source_runtime(scriptname, FALSE) == OK)
  	    ret = TRUE;
      }
  
      vim_free(tofree);
      return ret;
  }
  
  /*
   * Return the autoload script name for a function or variable name.
   * Returns NULL when out of memory.
   */
      static char_u *
  autoload_name(name)
      char_u	*name;
  {
      char_u	*p;
      char_u	*scriptname;
  
      /* Get the script file name: replace '#' with '/', append ".vim". */
      scriptname = alloc((unsigned)(STRLEN(name) + 14));
      if (scriptname == NULL)
  	return FALSE;
      STRCPY(scriptname, "autoload/");
      STRCAT(scriptname, name);
      *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
      STRCAT(scriptname, ".vim");
      while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
  	*p = '/';
      return scriptname;
  }
  
  #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
  
  /*
   * Function given to ExpandGeneric() to obtain the list of user defined
   * function names.
   */
      char_u *
  get_user_func_name(xp, idx)
      expand_T	*xp;
      int		idx;
  {
      static long_u	done;
      static hashitem_T	*hi;
      ufunc_T		*fp;
  
      if (idx == 0)
      {
  	done = 0;
  	hi = func_hashtab.ht_array;
      }
      if (done < func_hashtab.ht_used)
      {
  	if (done++ > 0)
  	    ++hi;
  	while (HASHITEM_EMPTY(hi))
  	    ++hi;
  	fp = HI2UF(hi);
  
  	if (fp->uf_flags & FC_DICT)
  	    return (char_u *)""; /* don't show dict functions */
  
  	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
  	    return fp->uf_name;	/* prevents overflow */
  
  	cat_func_name(IObuff, fp);
  	if (xp->xp_context != EXPAND_USER_FUNC)
  	{
  	    STRCAT(IObuff, "(");
  	    if (!fp->uf_varargs && fp->uf_args.ga_len == 0)
  		STRCAT(IObuff, ")");
  	}
  	return IObuff;
      }
      return NULL;
  }
  
  #endif /* FEAT_CMDL_COMPL */
  
  /*
   * Copy the function name of "fp" to buffer "buf".
   * "buf" must be able to hold the function name plus three bytes.
   * Takes care of script-local function names.
   */
      static void
  cat_func_name(buf, fp)
      char_u	*buf;
      ufunc_T	*fp;
  {
      if (fp->uf_name[0] == K_SPECIAL)
      {
  	STRCPY(buf, "<SNR>");
  	STRCAT(buf, fp->uf_name + 3);
      }
      else
  	STRCPY(buf, fp->uf_name);
  }
  
  /*
   * ":delfunction {name}"
   */
      void
  ex_delfunction(eap)
      exarg_T	*eap;
  {
      ufunc_T	*fp = NULL;
      char_u	*p;
      char_u	*name;
      funcdict_T	fudi;
  
      p = eap->arg;
      name = trans_function_name(&p, eap->skip, 0, &fudi);
      vim_free(fudi.fd_newkey);
      if (name == NULL)
      {
  	if (fudi.fd_dict != NULL && !eap->skip)
  	    EMSG(_(e_funcref));
  	return;
      }
      if (!ends_excmd(*skipwhite(p)))
      {
  	vim_free(name);
  	EMSG(_(e_trailing));
  	return;
      }
      eap->nextcmd = check_nextcmd(p);
      if (eap->nextcmd != NULL)
  	*p = NUL;
  
      if (!eap->skip)
  	fp = find_func(name);
      vim_free(name);
  
      if (!eap->skip)
      {
  	if (fp == NULL)
  	{
  	    EMSG2(_(e_nofunc), eap->arg);
  	    return;
  	}
  	if (fp->uf_calls > 0)
  	{
  	    EMSG2(_("E131: Cannot delete function %s: It is in use"), eap->arg);
  	    return;
  	}
  
  	if (fudi.fd_dict != NULL)
  	{
  	    /* Delete the dict item that refers to the function, it will
  	     * invoke func_unref() and possibly delete the function. */
  	    dictitem_remove(fudi.fd_dict, fudi.fd_di);
  	}
  	else
  	    func_free(fp);
      }
  }
  
  /*
   * Free a function and remove it from the list of functions.
   */
      static void
  func_free(fp)
      ufunc_T *fp;
  {
      hashitem_T	*hi;
  
      /* clear this function */
      ga_clear_strings(&(fp->uf_args));
      ga_clear_strings(&(fp->uf_lines));
  #ifdef FEAT_PROFILE
      vim_free(fp->uf_tml_count);
      vim_free(fp->uf_tml_total);
      vim_free(fp->uf_tml_self);
  #endif
  
      /* remove the function from the function hashtable */
      hi = hash_find(&func_hashtab, UF2HIKEY(fp));
      if (HASHITEM_EMPTY(hi))
  	EMSG2(_(e_intern2), "func_free()");
      else
  	hash_remove(&func_hashtab, hi);
  
      vim_free(fp);
  }
  
  /*
   * Unreference a Function: decrement the reference count and free it when it
   * becomes zero.  Only for numbered functions.
   */
      void
  func_unref(name)
      char_u	*name;
  {
      ufunc_T *fp;
  
      if (name != NULL && isdigit(*name))
      {
  	fp = find_func(name);
  	if (fp == NULL)
  	    EMSG2(_(e_intern2), "func_unref()");
  	else if (--fp->uf_refcount <= 0)
  	{
  	    /* Only delete it when it's not being used.  Otherwise it's done
  	     * when "uf_calls" becomes zero. */
  	    if (fp->uf_calls == 0)
  		func_free(fp);
  	}
      }
  }
  
  /*
   * Count a reference to a Function.
   */
      void
  func_ref(name)
      char_u	*name;
  {
      ufunc_T *fp;
  
      if (name != NULL && isdigit(*name))
      {
  	fp = find_func(name);
  	if (fp == NULL)
  	    EMSG2(_(e_intern2), "func_ref()");
  	else
  	    ++fp->uf_refcount;
      }
  }
  
  /*
   * Call a user function.
   */
      static void
  call_user_func(fp, argcount, argvars, rettv, firstline, lastline, selfdict)
      ufunc_T	*fp;		/* pointer to function */
      int		argcount;	/* nr of args */
      typval_T	*argvars;	/* arguments */
      typval_T	*rettv;		/* return value */
      linenr_T	firstline;	/* first line of range */
      linenr_T	lastline;	/* last line of range */
      dict_T	*selfdict;	/* Dictionary for "self" */
  {
      char_u	*save_sourcing_name;
      linenr_T	save_sourcing_lnum;
      scid_T	save_current_SID;
      funccall_T	*fc;
      int		save_did_emsg;
      static int	depth = 0;
      dictitem_T	*v;
      int		fixvar_idx = 0;	/* index in fixvar[] */
      int		i;
      int		ai;
      char_u	numbuf[NUMBUFLEN];
      char_u	*name;
  #ifdef FEAT_PROFILE
      proftime_T	wait_start;
      proftime_T	call_start;
  #endif
  
      /* If depth of calling is getting too high, don't execute the function */
      if (depth >= p_mfd)
      {
  	EMSG(_("E132: Function call depth is higher than 'maxfuncdepth'"));
  	rettv->v_type = VAR_NUMBER;
  	rettv->vval.v_number = -1;
  	return;
      }
      ++depth;
  
      line_breakcheck();		/* check for CTRL-C hit */
  
      fc = (funccall_T *)alloc(sizeof(funccall_T));
      fc->caller = current_funccal;
      current_funccal = fc;
      fc->func = fp;
      fc->rettv = rettv;
      rettv->vval.v_number = 0;
      fc->linenr = 0;
      fc->returned = FALSE;
      fc->level = ex_nesting_level;
      /* Check if this function has a breakpoint. */
      fc->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
      fc->dbg_tick = debug_tick;
  
      /*
       * Note about using fc->fixvar[]: This is an array of FIXVAR_CNT variables
       * with names up to VAR_SHORT_LEN long.  This avoids having to alloc/free
       * each argument variable and saves a lot of time.
       */
      /*
       * Init l: variables.
       */
      init_var_dict(&fc->l_vars, &fc->l_vars_var, VAR_DEF_SCOPE);
      if (selfdict != NULL)
      {
  	/* Set l:self to "selfdict".  Use "name" to avoid a warning from
  	 * some compiler that checks the destination size. */
  	v = &fc->fixvar[fixvar_idx++].var;
  	name = v->di_key;
  	STRCPY(name, "self");
  	v->di_flags = DI_FLAGS_RO + DI_FLAGS_FIX;
  	hash_add(&fc->l_vars.dv_hashtab, DI2HIKEY(v));
  	v->di_tv.v_type = VAR_DICT;
  	v->di_tv.v_lock = 0;
  	v->di_tv.vval.v_dict = selfdict;
  	++selfdict->dv_refcount;
      }
  
      /*
       * Init a: variables.
       * Set a:0 to "argcount".
       * Set a:000 to a list with room for the "..." arguments.
       */
      init_var_dict(&fc->l_avars, &fc->l_avars_var, VAR_SCOPE);
      add_nr_var(&fc->l_avars, &fc->fixvar[fixvar_idx++].var, "0",
  				(varnumber_T)(argcount - fp->uf_args.ga_len));
      /* Use "name" to avoid a warning from some compiler that checks the
       * destination size. */
      v = &fc->fixvar[fixvar_idx++].var;
      name = v->di_key;
      STRCPY(name, "000");
      v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
      hash_add(&fc->l_avars.dv_hashtab, DI2HIKEY(v));
      v->di_tv.v_type = VAR_LIST;
      v->di_tv.v_lock = VAR_FIXED;
      v->di_tv.vval.v_list = &fc->l_varlist;
      vim_memset(&fc->l_varlist, 0, sizeof(list_T));
      fc->l_varlist.lv_refcount = DO_NOT_FREE_CNT;
      fc->l_varlist.lv_lock = VAR_FIXED;
  
      /*
       * Set a:firstline to "firstline" and a:lastline to "lastline".
       * Set a:name to named arguments.
       * Set a:N to the "..." arguments.
       */
      add_nr_var(&fc->l_avars, &fc->fixvar[fixvar_idx++].var, "firstline",
  						      (varnumber_T)firstline);
      add_nr_var(&fc->l_avars, &fc->fixvar[fixvar_idx++].var, "lastline",
  						       (varnumber_T)lastline);
      for (i = 0; i < argcount; ++i)
      {
  	ai = i - fp->uf_args.ga_len;
  	if (ai < 0)
  	    /* named argument a:name */
  	    name = FUNCARG(fp, i);
  	else
  	{
  	    /* "..." argument a:1, a:2, etc. */
  	    sprintf((char *)numbuf, "%d", ai + 1);
  	    name = numbuf;
  	}
  	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
  	{
  	    v = &fc->fixvar[fixvar_idx++].var;
  	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
  	}
  	else
  	{
  	    v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
  							     + STRLEN(name)));
  	    if (v == NULL)
  		break;
  	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX | DI_FLAGS_ALLOC;
  	}
  	STRCPY(v->di_key, name);
  	hash_add(&fc->l_avars.dv_hashtab, DI2HIKEY(v));
  
  	/* Note: the values are copied directly to avoid alloc/free.
  	 * "argvars" must have VAR_FIXED for v_lock. */
  	v->di_tv = argvars[i];
  	v->di_tv.v_lock = VAR_FIXED;
  
  	if (ai >= 0 && ai < MAX_FUNC_ARGS)
  	{
  	    list_append(&fc->l_varlist, &fc->l_listitems[ai]);
  	    fc->l_listitems[ai].li_tv = argvars[i];
  	    fc->l_listitems[ai].li_tv.v_lock = VAR_FIXED;
  	}
      }
  
      /* Don't redraw while executing the function. */
      ++RedrawingDisabled;
      save_sourcing_name = sourcing_name;
      save_sourcing_lnum = sourcing_lnum;
      sourcing_lnum = 1;
      sourcing_name = alloc((unsigned)((save_sourcing_name == NULL ? 0
  		: STRLEN(save_sourcing_name)) + STRLEN(fp->uf_name) + 13));
      if (sourcing_name != NULL)
      {
  	if (save_sourcing_name != NULL
  			  && STRNCMP(save_sourcing_name, "function ", 9) == 0)
  	    sprintf((char *)sourcing_name, "%s..", save_sourcing_name);
  	else
  	    STRCPY(sourcing_name, "function ");
  	cat_func_name(sourcing_name + STRLEN(sourcing_name), fp);
  
  	if (p_verbose >= 12)
  	{
  	    ++no_wait_return;
  	    verbose_enter_scroll();
  
  	    smsg((char_u *)_("calling %s"), sourcing_name);
  	    if (p_verbose >= 14)
  	    {
  		char_u	buf[MSG_BUF_LEN];
  		char_u	numbuf2[NUMBUFLEN];
  		char_u	*tofree;
  		char_u	*s;
  
  		msg_puts((char_u *)"(");
  		for (i = 0; i < argcount; ++i)
  		{
  		    if (i > 0)
  			msg_puts((char_u *)", ");
  		    if (argvars[i].v_type == VAR_NUMBER)
  			msg_outnum((long)argvars[i].vval.v_number);
  		    else
  		    {
  			/* Do not want errors such as E724 here. */
  			++emsg_off;
  			s = tv2string(&argvars[i], &tofree, numbuf2, 0);
  			--emsg_off;
  			if (s != NULL)
  			{
  			    if (vim_strsize(s) > MSG_BUF_CLEN)
  			    {
  				trunc_string(s, buf, MSG_BUF_CLEN, MSG_BUF_LEN);
  				s = buf;
  			    }
  			    msg_puts(s);
  			    vim_free(tofree);
  			}
  		    }
  		}
  		msg_puts((char_u *)")");
  	    }
  	    msg_puts((char_u *)"\n");   /* don't overwrite this either */
  
  	    verbose_leave_scroll();
  	    --no_wait_return;
  	}
      }
  #ifdef FEAT_PROFILE
      if (do_profiling == PROF_YES)
      {
  	if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL))
  	    func_do_profile(fp);
  	if (fp->uf_profiling
  		    || (fc->caller != NULL && fc->caller->func->uf_profiling))
  	{
  	    ++fp->uf_tm_count;
  	    profile_start(&call_start);
  	    profile_zero(&fp->uf_tm_children);
  	}
  	script_prof_save(&wait_start);
      }
  #endif
  
      save_current_SID = current_SID;
      current_SID = fp->uf_script_ID;
      save_did_emsg = did_emsg;
      did_emsg = FALSE;
  
      /* call do_cmdline() to execute the lines */
      do_cmdline(NULL, get_func_line, (void *)fc,
  				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
  
      --RedrawingDisabled;
  
      /* when the function was aborted because of an error, return -1 */
      if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
      {
  	clear_tv(rettv);
  	rettv->v_type = VAR_NUMBER;
  	rettv->vval.v_number = -1;
      }
  
  #ifdef FEAT_PROFILE
      if (do_profiling == PROF_YES && (fp->uf_profiling
  		    || (fc->caller != NULL && fc->caller->func->uf_profiling)))
      {
  	profile_end(&call_start);
  	profile_sub_wait(&wait_start, &call_start);
  	profile_add(&fp->uf_tm_total, &call_start);
  	profile_self(&fp->uf_tm_self, &call_start, &fp->uf_tm_children);
  	if (fc->caller != NULL && fc->caller->func->uf_profiling)
  	{
  	    profile_add(&fc->caller->func->uf_tm_children, &call_start);
  	    profile_add(&fc->caller->func->uf_tml_children, &call_start);
  	}
      }
  #endif
  
      /* when being verbose, mention the return value */
      if (p_verbose >= 12)
      {
  	++no_wait_return;
  	verbose_enter_scroll();
  
  	if (aborting())
  	    smsg((char_u *)_("%s aborted"), sourcing_name);
  	else if (fc->rettv->v_type == VAR_NUMBER)
  	    smsg((char_u *)_("%s returning #%ld"), sourcing_name,
  					       (long)fc->rettv->vval.v_number);
  	else
  	{
  	    char_u	buf[MSG_BUF_LEN];
  	    char_u	numbuf2[NUMBUFLEN];
  	    char_u	*tofree;
  	    char_u	*s;
  
  	    /* The value may be very long.  Skip the middle part, so that we
  	     * have some idea how it starts and ends. smsg() would always
  	     * truncate it at the end. Don't want errors such as E724 here. */
  	    ++emsg_off;
  	    s = tv2string(fc->rettv, &tofree, numbuf2, 0);
  	    --emsg_off;
  	    if (s != NULL)
  	    {
  		if (vim_strsize(s) > MSG_BUF_CLEN)
  		{
  		    trunc_string(s, buf, MSG_BUF_CLEN, MSG_BUF_LEN);
  		    s = buf;
  		}
  		smsg((char_u *)_("%s returning %s"), sourcing_name, s);
  		vim_free(tofree);
  	    }
  	}
  	msg_puts((char_u *)"\n");   /* don't overwrite this either */
  
  	verbose_leave_scroll();
  	--no_wait_return;
      }
  
      vim_free(sourcing_name);
      sourcing_name = save_sourcing_name;
      sourcing_lnum = save_sourcing_lnum;
      current_SID = save_current_SID;
  #ifdef FEAT_PROFILE
      if (do_profiling == PROF_YES)
  	script_prof_restore(&wait_start);
  #endif
  
      if (p_verbose >= 12 && sourcing_name != NULL)
      {
  	++no_wait_return;
  	verbose_enter_scroll();
  
  	smsg((char_u *)_("continuing in %s"), sourcing_name);
  	msg_puts((char_u *)"\n");   /* don't overwrite this either */
  
  	verbose_leave_scroll();
  	--no_wait_return;
      }
  
      did_emsg |= save_did_emsg;
      current_funccal = fc->caller;
      --depth;
  
      /* If the a:000 list and the l: and a: dicts are not referenced we can
       * free the funccall_T and what's in it. */
      if (fc->l_varlist.lv_refcount == DO_NOT_FREE_CNT
  	    && fc->l_vars.dv_refcount == DO_NOT_FREE_CNT
  	    && fc->l_avars.dv_refcount == DO_NOT_FREE_CNT)
      {
  	free_funccal(fc, FALSE);
      }
      else
      {
  	hashitem_T	*hi;
  	listitem_T	*li;
  	int		todo;
  
  	/* "fc" is still in use.  This can happen when returning "a:000" or
  	 * assigning "l:" to a global variable.
  	 * Link "fc" in the list for garbage collection later. */
  	fc->caller = previous_funccal;
  	previous_funccal = fc;
  
  	/* Make a copy of the a: variables, since we didn't do that above. */
  	todo = (int)fc->l_avars.dv_hashtab.ht_used;
  	for (hi = fc->l_avars.dv_hashtab.ht_array; todo > 0; ++hi)
  	{
  	    if (!HASHITEM_EMPTY(hi))
  	    {
  		--todo;
  		v = HI2DI(hi);
  		copy_tv(&v->di_tv, &v->di_tv);
  	    }
  	}
  
  	/* Make a copy of the a:000 items, since we didn't do that above. */
  	for (li = fc->l_varlist.lv_first; li != NULL; li = li->li_next)
  	    copy_tv(&li->li_tv, &li->li_tv);
      }
  }
  
  /*
   * Return TRUE if items in "fc" do not have "copyID".  That means they are not
   * referenced from anywhere that is in use.
   */
      static int
  can_free_funccal(fc, copyID)
      funccall_T	*fc;
      int		copyID;
  {
      return (fc->l_varlist.lv_copyID != copyID
  	    && fc->l_vars.dv_copyID != copyID
  	    && fc->l_avars.dv_copyID != copyID);
  }
  
  /*
   * Free "fc" and what it contains.
   */
     static void
  free_funccal(fc, free_val)
      funccall_T	*fc;
      int		free_val;  /* a: vars were allocated */
  {
      listitem_T	*li;
  
      /* The a: variables typevals may not have been allocated, only free the
       * allocated variables. */
      vars_clear_ext(&fc->l_avars.dv_hashtab, free_val);
  
      /* free all l: variables */
      vars_clear(&fc->l_vars.dv_hashtab);
  
      /* Free the a:000 variables if they were allocated. */
      if (free_val)
  	for (li = fc->l_varlist.lv_first; li != NULL; li = li->li_next)
  	    clear_tv(&li->li_tv);
  
      vim_free(fc);
  }
  
  /*
   * Add a number variable "name" to dict "dp" with value "nr".
   */
      static void
  add_nr_var(dp, v, name, nr)
      dict_T	*dp;
      dictitem_T	*v;
      char	*name;
      varnumber_T nr;
  {
      STRCPY(v->di_key, name);
      v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
      hash_add(&dp->dv_hashtab, DI2HIKEY(v));
      v->di_tv.v_type = VAR_NUMBER;
      v->di_tv.v_lock = VAR_FIXED;
      v->di_tv.vval.v_number = nr;
  }
  
  /*
   * ":return [expr]"
   */
      void
  ex_return(eap)
      exarg_T	*eap;
  {
      char_u	*arg = eap->arg;
      typval_T	rettv;
      int		returning = FALSE;
  
      if (current_funccal == NULL)
      {
  	EMSG(_("E133: :return not inside a function"));
  	return;
      }
  
      if (eap->skip)
  	++emsg_skip;
  
      eap->nextcmd = NULL;
      if ((*arg != NUL && *arg != '|' && *arg != '\n')
  	    && eval0(arg, &rettv, &eap->nextcmd, !eap->skip) != FAIL)
      {
  	if (!eap->skip)
  	    returning = do_return(eap, FALSE, TRUE, &rettv);
  	else
  	    clear_tv(&rettv);
      }
      /* It's safer to return also on error. */
      else if (!eap->skip)
      {
  	/*
  	 * Return unless the expression evaluation has been cancelled due to an
  	 * aborting error, an interrupt, or an exception.
  	 */
  	if (!aborting())
  	    returning = do_return(eap, FALSE, TRUE, NULL);
      }
  
      /* When skipping or the return gets pending, advance to the next command
       * in this line (!returning).  Otherwise, ignore the rest of the line.
       * Following lines will be ignored by get_func_line(). */
      if (returning)
  	eap->nextcmd = NULL;
      else if (eap->nextcmd == NULL)	    /* no argument */
  	eap->nextcmd = check_nextcmd(arg);
  
      if (eap->skip)
  	--emsg_skip;
  }
  
  /*
   * Return from a function.  Possibly makes the return pending.  Also called
   * for a pending return at the ":endtry" or after returning from an extra
   * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
   * when called due to a ":return" command.  "rettv" may point to a typval_T
   * with the return rettv.  Returns TRUE when the return can be carried out,
   * FALSE when the return gets pending.
   */
      int
  do_return(eap, reanimate, is_cmd, rettv)
      exarg_T	*eap;
      int		reanimate;
      int		is_cmd;
      void	*rettv;
  {
      int		idx;
      struct condstack *cstack = eap->cstack;
  
      if (reanimate)
  	/* Undo the return. */
  	current_funccal->returned = FALSE;
  
      /*
       * Cleanup (and inactivate) conditionals, but stop when a try conditional
       * not in its finally clause (which then is to be executed next) is found.
       * In this case, make the ":return" pending for execution at the ":endtry".
       * Otherwise, return normally.
       */
      idx = cleanup_conditionals(eap->cstack, 0, TRUE);
      if (idx >= 0)
      {
  	cstack->cs_pending[idx] = CSTP_RETURN;
  
  	if (!is_cmd && !reanimate)
  	    /* A pending return again gets pending.  "rettv" points to an
  	     * allocated variable with the rettv of the original ":return"'s
  	     * argument if present or is NULL else. */
  	    cstack->cs_rettv[idx] = rettv;
  	else
  	{
  	    /* When undoing a return in order to make it pending, get the stored
  	     * return rettv. */
  	    if (reanimate)
  		rettv = current_funccal->rettv;
  
  	    if (rettv != NULL)
  	    {
  		/* Store the value of the pending return. */
  		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
  		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
  		else
  		    EMSG(_(e_outofmem));
  	    }
  	    else
  		cstack->cs_rettv[idx] = NULL;
  
  	    if (reanimate)
  	    {
  		/* The pending return value could be overwritten by a ":return"
  		 * without argument in a finally clause; reset the default
  		 * return value. */
  		current_funccal->rettv->v_type = VAR_NUMBER;
  		current_funccal->rettv->vval.v_number = 0;
  	    }
  	}
  	report_make_pending(CSTP_RETURN, rettv);
      }
      else
      {
  	current_funccal->returned = TRUE;
  
  	/* If the return is carried out now, store the return value.  For
  	 * a return immediately after reanimation, the value is already
  	 * there. */
  	if (!reanimate && rettv != NULL)
  	{
  	    clear_tv(current_funccal->rettv);
  	    *current_funccal->rettv = *(typval_T *)rettv;
  	    if (!is_cmd)
  		vim_free(rettv);
  	}
      }
  
      return idx < 0;
  }
  
  /*
   * Free the variable with a pending return value.
   */
      void
  discard_pending_return(rettv)
      void	*rettv;
  {
      free_tv((typval_T *)rettv);
  }
  
  /*
   * Generate a return command for producing the value of "rettv".  The result
   * is an allocated string.  Used by report_pending() for verbose messages.
   */
      char_u *
  get_return_cmd(rettv)
      void	*rettv;
  {
      char_u	*s = NULL;
      char_u	*tofree = NULL;
      char_u	numbuf[NUMBUFLEN];
  
      if (rettv != NULL)
  	s = echo_string((typval_T *)rettv, &tofree, numbuf, 0);
      if (s == NULL)
  	s = (char_u *)"";
  
      STRCPY(IObuff, ":return ");
      STRNCPY(IObuff + 8, s, IOSIZE - 8);
      if (STRLEN(s) + 8 >= IOSIZE)
  	STRCPY(IObuff + IOSIZE - 4, "...");
      vim_free(tofree);
      return vim_strsave(IObuff);
  }
  
  /*
   * Get next function line.
   * Called by do_cmdline() to get the next line.
   * Returns allocated string, or NULL for end of function.
   */
      char_u *
  get_func_line(c, cookie, indent)
      int	    c UNUSED;
      void    *cookie;
      int	    indent UNUSED;
  {
      funccall_T	*fcp = (funccall_T *)cookie;
      ufunc_T	*fp = fcp->func;
      char_u	*retval;
      garray_T	*gap;  /* growarray with function lines */
  
      /* If breakpoints have been added/deleted need to check for it. */
      if (fcp->dbg_tick != debug_tick)
      {
  	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
  							       sourcing_lnum);
  	fcp->dbg_tick = debug_tick;
      }
  #ifdef FEAT_PROFILE
      if (do_profiling == PROF_YES)
  	func_line_end(cookie);
  #endif
  
      gap = &fp->uf_lines;
      if (((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
  	    || fcp->returned)
  	retval = NULL;
      else
      {
  	/* Skip NULL lines (continuation lines). */
  	while (fcp->linenr < gap->ga_len
  			  && ((char_u **)(gap->ga_data))[fcp->linenr] == NULL)
  	    ++fcp->linenr;
  	if (fcp->linenr >= gap->ga_len)
  	    retval = NULL;
  	else
  	{
  	    retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]);
  	    sourcing_lnum = fcp->linenr;
  #ifdef FEAT_PROFILE
  	    if (do_profiling == PROF_YES)
  		func_line_start(cookie);
  #endif
  	}
      }
  
      /* Did we encounter a breakpoint? */
      if (fcp->breakpoint != 0 && fcp->breakpoint <= sourcing_lnum)
      {
  	dbg_breakpoint(fp->uf_name, sourcing_lnum);
  	/* Find next breakpoint. */
  	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
  							       sourcing_lnum);
  	fcp->dbg_tick = debug_tick;
      }
  
      return retval;
  }
  
  #if defined(FEAT_PROFILE) || defined(PROTO)
  /*
   * Called when starting to read a function line.
   * "sourcing_lnum" must be correct!
   * When skipping lines it may not actually be executed, but we won't find out
   * until later and we need to store the time now.
   */
      void
  func_line_start(cookie)
      void    *cookie;
  {
      funccall_T	*fcp = (funccall_T *)cookie;
      ufunc_T	*fp = fcp->func;
  
      if (fp->uf_profiling && sourcing_lnum >= 1
  				      && sourcing_lnum <= fp->uf_lines.ga_len)
      {
  	fp->uf_tml_idx = sourcing_lnum - 1;
  	/* Skip continuation lines. */
  	while (fp->uf_tml_idx > 0 && FUNCLINE(fp, fp->uf_tml_idx) == NULL)
  	    --fp->uf_tml_idx;
  	fp->uf_tml_execed = FALSE;
  	profile_start(&fp->uf_tml_start);
  	profile_zero(&fp->uf_tml_children);
  	profile_get_wait(&fp->uf_tml_wait);
      }
  }
  
  /*
   * Called when actually executing a function line.
   */
      void
  func_line_exec(cookie)
      void    *cookie;
  {
      funccall_T	*fcp = (funccall_T *)cookie;
      ufunc_T	*fp = fcp->func;
  
      if (fp->uf_profiling && fp->uf_tml_idx >= 0)
  	fp->uf_tml_execed = TRUE;
  }
  
  /*
   * Called when done with a function line.
   */
      void
  func_line_end(cookie)
      void    *cookie;
  {
      funccall_T	*fcp = (funccall_T *)cookie;
      ufunc_T	*fp = fcp->func;
  
      if (fp->uf_profiling && fp->uf_tml_idx >= 0)
      {
  	if (fp->uf_tml_execed)
  	{
  	    ++fp->uf_tml_count[fp->uf_tml_idx];
  	    profile_end(&fp->uf_tml_start);
  	    profile_sub_wait(&fp->uf_tml_wait, &fp->uf_tml_start);
  	    profile_add(&fp->uf_tml_total[fp->uf_tml_idx], &fp->uf_tml_start);
  	    profile_self(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_start,
  							&fp->uf_tml_children);
  	}
  	fp->uf_tml_idx = -1;
      }
  }
  #endif
  
  /*
   * Return TRUE if the currently active function should be ended, because a
   * return was encountered or an error occurred.  Used inside a ":while".
   */
      int
  func_has_ended(cookie)
      void    *cookie;
  {
      funccall_T  *fcp = (funccall_T *)cookie;
  
      /* Ignore the "abort" flag if the abortion behavior has been changed due to
       * an error inside a try conditional. */
      return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
  	    || fcp->returned);
  }
  
  /*
   * return TRUE if cookie indicates a function which "abort"s on errors.
   */
      int
  func_has_abort(cookie)
      void    *cookie;
  {
      return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT;
  }
  
  #if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
  typedef enum
  {
      VAR_FLAVOUR_DEFAULT,	/* doesn't start with uppercase */
      VAR_FLAVOUR_SESSION,	/* starts with uppercase, some lower */
      VAR_FLAVOUR_VIMINFO		/* all uppercase */
  } var_flavour_T;
  
  static var_flavour_T var_flavour __ARGS((char_u *varname));
  
      static var_flavour_T
  var_flavour(varname)
      char_u *varname;
  {
      char_u *p = varname;
  
      if (ASCII_ISUPPER(*p))
      {
  	while (*(++p))
  	    if (ASCII_ISLOWER(*p))
  		return VAR_FLAVOUR_SESSION;
  	return VAR_FLAVOUR_VIMINFO;
      }
      else
  	return VAR_FLAVOUR_DEFAULT;
  }
  #endif
  
  #if defined(FEAT_VIMINFO) || defined(PROTO)
  /*
   * Restore global vars that start with a capital from the viminfo file
   */
      int
  read_viminfo_varlist(virp, writing)
      vir_T	*virp;
      int		writing;
  {
      char_u	*tab;
      int		type = VAR_NUMBER;
      typval_T	tv;
  
      if (!writing && (find_viminfo_parameter('!') != NULL))
      {
  	tab = vim_strchr(virp->vir_line + 1, '\t');
  	if (tab != NULL)
  	{
  	    *tab++ = '\0';	/* isolate the variable name */
  	    switch (*tab)
  	    {
  		case 'S': type = VAR_STRING; break;
  #ifdef FEAT_FLOAT
  		case 'F': type = VAR_FLOAT; break;
  #endif
  		case 'D': type = VAR_DICT; break;
  		case 'L': type = VAR_LIST; break;
  	    }
  
  	    tab = vim_strchr(tab, '\t');
  	    if (tab != NULL)
  	    {
  		tv.v_type = type;
  		if (type == VAR_STRING || type == VAR_DICT || type == VAR_LIST)
  		    tv.vval.v_string = viminfo_readstring(virp,
  				       (int)(tab - virp->vir_line + 1), TRUE);
  #ifdef FEAT_FLOAT
  		else if (type == VAR_FLOAT)
  		    (void)string2float(tab + 1, &tv.vval.v_float);
  #endif
  		else
  		    tv.vval.v_number = atol((char *)tab + 1);
  		if (type == VAR_DICT || type == VAR_LIST)
  		{
  		    typval_T *etv = eval_expr(tv.vval.v_string, NULL);
  
  		    if (etv == NULL)
  			/* Failed to parse back the dict or list, use it as a
  			 * string. */
  			tv.v_type = VAR_STRING;
  		    else
  		    {
  			vim_free(tv.vval.v_string);
  			tv = *etv;
  			vim_free(etv);
  		    }
  		}
  
  		set_var(virp->vir_line + 1, &tv, FALSE);
  
  		if (tv.v_type == VAR_STRING)
  		    vim_free(tv.vval.v_string);
  		else if (tv.v_type == VAR_DICT || tv.v_type == VAR_LIST)
  		    clear_tv(&tv);
  	    }
  	}
      }
  
      return viminfo_readline(virp);
  }
  
  /*
   * Write global vars that start with a capital to the viminfo file
   */
      void
  write_viminfo_varlist(fp)
      FILE    *fp;
  {
      hashitem_T	*hi;
      dictitem_T	*this_var;
      int		todo;
      char	*s;
      char_u	*p;
      char_u	*tofree;
      char_u	numbuf[NUMBUFLEN];
  
      if (find_viminfo_parameter('!') == NULL)
  	return;
  
      fputs(_("\n# global variables:\n"), fp);
  
      todo = (int)globvarht.ht_used;
      for (hi = globvarht.ht_array; todo > 0; ++hi)
      {
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    --todo;
  	    this_var = HI2DI(hi);
  	    if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
  	    {
  		switch (this_var->di_tv.v_type)
  		{
  		    case VAR_STRING: s = "STR"; break;
  		    case VAR_NUMBER: s = "NUM"; break;
  #ifdef FEAT_FLOAT
  		    case VAR_FLOAT:  s = "FLO"; break;
  #endif
  		    case VAR_DICT:   s = "DIC"; break;
  		    case VAR_LIST:   s = "LIS"; break;
  		    default: continue;
  		}
  		fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
  		p = echo_string(&this_var->di_tv, &tofree, numbuf, 0);
  		if (p != NULL)
  		    viminfo_writestring(fp, p);
  		vim_free(tofree);
  	    }
  	}
      }
  }
  #endif
  
  #if defined(FEAT_SESSION) || defined(PROTO)
      int
  store_session_globals(fd)
      FILE	*fd;
  {
      hashitem_T	*hi;
      dictitem_T	*this_var;
      int		todo;
      char_u	*p, *t;
  
      todo = (int)globvarht.ht_used;
      for (hi = globvarht.ht_array; todo > 0; ++hi)
      {
  	if (!HASHITEM_EMPTY(hi))
  	{
  	    --todo;
  	    this_var = HI2DI(hi);
  	    if ((this_var->di_tv.v_type == VAR_NUMBER
  			|| this_var->di_tv.v_type == VAR_STRING)
  		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
  	    {
  		/* Escape special characters with a backslash.  Turn a LF and
  		 * CR into \n and \r. */
  		p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
  							(char_u *)"\\\"\n\r");
  		if (p == NULL)	    /* out of memory */
  		    break;
  		for (t = p; *t != NUL; ++t)
  		    if (*t == '\n')
  			*t = 'n';
  		    else if (*t == '\r')
  			*t = 'r';
  		if ((fprintf(fd, "let %s = %c%s%c",
  				this_var->di_key,
  				(this_var->di_tv.v_type == VAR_STRING) ? '"'
  									: ' ',
  				p,
  				(this_var->di_tv.v_type == VAR_STRING) ? '"'
  								   : ' ') < 0)
  			|| put_eol(fd) == FAIL)
  		{
  		    vim_free(p);
  		    return FAIL;
  		}
  		vim_free(p);
  	    }
  #ifdef FEAT_FLOAT
  	    else if (this_var->di_tv.v_type == VAR_FLOAT
  		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
  	    {
  		float_T f = this_var->di_tv.vval.v_float;
  		int sign = ' ';
  
  		if (f < 0)
  		{
  		    f = -f;
  		    sign = '-';
  		}
  		if ((fprintf(fd, "let %s = %c%f",
  					       this_var->di_key, sign, f) < 0)
  			|| put_eol(fd) == FAIL)
  		    return FAIL;
  	    }
  #endif
  	}
      }
      return OK;
  }
  #endif
  
  /*
   * Display script name where an item was last set.
   * Should only be invoked when 'verbose' is non-zero.
   */
      void
  last_set_msg(scriptID)
      scid_T scriptID;
  {
      char_u *p;
  
      if (scriptID != 0)
      {
  	p = home_replace_save(NULL, get_scriptname(scriptID));
  	if (p != NULL)
  	{
  	    verbose_enter();
  	    MSG_PUTS(_("\n\tLast set from "));
  	    MSG_PUTS(p);
  	    vim_free(p);
  	    verbose_leave();
  	}
      }
  }
  
  /*
   * List v:oldfiles in a nice way.
   */
      void
  ex_oldfiles(eap)
      exarg_T	*eap UNUSED;
  {
      list_T	*l = vimvars[VV_OLDFILES].vv_list;
      listitem_T	*li;
      int		nr = 0;
  
      if (l == NULL)
  	msg((char_u *)_("No old files"));
      else
      {
  	msg_start();
  	msg_scroll = TRUE;
  	for (li = l->lv_first; li != NULL && !got_int; li = li->li_next)
  	{
  	    msg_outnum((long)++nr);
  	    MSG_PUTS(": ");
  	    msg_outtrans(get_tv_string(&li->li_tv));
  	    msg_putchar('\n');
  	    out_flush();	    /* output one line at a time */
  	    ui_breakcheck();
  	}
  	/* Assume "got_int" was set to truncate the listing. */
  	got_int = FALSE;
  
  #ifdef FEAT_BROWSE_CMD
  	if (cmdmod.browse)
  	{
  	    quit_more = FALSE;
  	    nr = prompt_for_number(FALSE);
  	    msg_starthere();
  	    if (nr > 0)
  	    {
  		char_u *p = list_find_str(get_vim_var_list(VV_OLDFILES),
  								    (long)nr);
  
  		if (p != NULL)
  		{
  		    p = expand_env_save(p);
  		    eap->arg = p;
  		    eap->cmdidx = CMD_edit;
  		    cmdmod.browse = FALSE;
  		    do_exedit(eap, NULL);
  		    vim_free(p);
  		}
  	    }
  	}
  #endif
      }
  }
  
  /* reset v:option_new, v:option_old and v:option_type */
      void
  reset_v_option_vars()
  {
      set_vim_var_string(VV_OPTION_NEW,  NULL, -1);
      set_vim_var_string(VV_OPTION_OLD,  NULL, -1);
      set_vim_var_string(VV_OPTION_TYPE, NULL, -1);
  }
  
  
  #endif /* FEAT_EVAL */
  
  
  #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
  
  #ifdef WIN3264
  /*
   * Functions for ":8" filename modifier: get 8.3 version of a filename.
   */
  static int get_short_pathname __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
  static int shortpath_for_invalid_fname __ARGS((char_u **fname, char_u **bufp, int *fnamelen));
  static int shortpath_for_partial __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
  
  /*
   * Get the short path (8.3) for the filename in "fnamep".
   * Only works for a valid file name.
   * When the path gets longer "fnamep" is changed and the allocated buffer
   * is put in "bufp".
   * *fnamelen is the length of "fnamep" and set to 0 for a nonexistent path.
   * Returns OK on success, FAIL on failure.
   */
      static int
  get_short_pathname(fnamep, bufp, fnamelen)
      char_u	**fnamep;
      char_u	**bufp;
      int		*fnamelen;
  {
      int		l, len;
      char_u	*newbuf;
  
      len = *fnamelen;
      l = GetShortPathName(*fnamep, *fnamep, len);
      if (l > len - 1)
      {
  	/* If that doesn't work (not enough space), then save the string
  	 * and try again with a new buffer big enough. */
  	newbuf = vim_strnsave(*fnamep, l);
  	if (newbuf == NULL)
  	    return FAIL;
  
  	vim_free(*bufp);
  	*fnamep = *bufp = newbuf;
  
  	/* Really should always succeed, as the buffer is big enough. */
  	l = GetShortPathName(*fnamep, *fnamep, l+1);
      }
  
      *fnamelen = l;
      return OK;
  }
  
  /*
   * Get the short path (8.3) for the filename in "fname". The converted
   * path is returned in "bufp".
   *
   * Some of the directories specified in "fname" may not exist. This function
   * will shorten the existing directories at the beginning of the path and then
   * append the remaining non-existing path.
   *
   * fname - Pointer to the filename to shorten.  On return, contains the
   *	   pointer to the shortened pathname
   * bufp -  Pointer to an allocated buffer for the filename.
   * fnamelen - Length of the filename pointed to by fname
   *
   * Returns OK on success (or nothing done) and FAIL on failure (out of memory).
   */
      static int
  shortpath_for_invalid_fname(fname, bufp, fnamelen)
      char_u	**fname;
      char_u	**bufp;
      int		*fnamelen;
  {
      char_u	*short_fname, *save_fname, *pbuf_unused;
      char_u	*endp, *save_endp;
      char_u	ch;
      int		old_len, len;
      int		new_len, sfx_len;
      int		retval = OK;
  
      /* Make a copy */
      old_len = *fnamelen;
      save_fname = vim_strnsave(*fname, old_len);
      pbuf_unused = NULL;
      short_fname = NULL;
  
      endp = save_fname + old_len - 1; /* Find the end of the copy */
      save_endp = endp;
  
      /*
       * Try shortening the supplied path till it succeeds by removing one
       * directory at a time from the tail of the path.
       */
      len = 0;
      for (;;)
      {
  	/* go back one path-separator */
  	while (endp > save_fname && !after_pathsep(save_fname, endp + 1))
  	    --endp;
  	if (endp <= save_fname)
  	    break;		/* processed the complete path */
  
  	/*
  	 * Replace the path separator with a NUL and try to shorten the
  	 * resulting path.
  	 */
  	ch = *endp;
  	*endp = 0;
  	short_fname = save_fname;
  	len = (int)STRLEN(short_fname) + 1;
  	if (get_short_pathname(&short_fname, &pbuf_unused, &len) == FAIL)
  	{
  	    retval = FAIL;
  	    goto theend;
  	}
  	*endp = ch;	/* preserve the string */
  
  	if (len > 0)
  	    break;	/* successfully shortened the path */
  
  	/* failed to shorten the path. Skip the path separator */
  	--endp;
      }
  
      if (len > 0)
      {
  	/*
  	 * Succeeded in shortening the path. Now concatenate the shortened
  	 * path with the remaining path at the tail.
  	 */
  
  	/* Compute the length of the new path. */
  	sfx_len = (int)(save_endp - endp) + 1;
  	new_len = len + sfx_len;
  
  	*fnamelen = new_len;
  	vim_free(*bufp);
  	if (new_len > old_len)
  	{
  	    /* There is not enough space in the currently allocated string,
  	     * copy it to a buffer big enough. */
  	    *fname = *bufp = vim_strnsave(short_fname, new_len);
  	    if (*fname == NULL)
  	    {
  		retval = FAIL;
  		goto theend;
  	    }
  	}
  	else
  	{
  	    /* Transfer short_fname to the main buffer (it's big enough),
  	     * unless get_short_pathname() did its work in-place. */
  	    *fname = *bufp = save_fname;
  	    if (short_fname != save_fname)
  		vim_strncpy(save_fname, short_fname, len);
  	    save_fname = NULL;
  	}
  
  	/* concat the not-shortened part of the path */
  	vim_strncpy(*fname + len, endp, sfx_len);
  	(*fname)[new_len] = NUL;
      }
  
  theend:
      vim_free(pbuf_unused);
      vim_free(save_fname);
  
      return retval;
  }
  
  /*
   * Get a pathname for a partial path.
   * Returns OK for success, FAIL for failure.
   */
      static int
  shortpath_for_partial(fnamep, bufp, fnamelen)
      char_u	**fnamep;
      char_u	**bufp;
      int		*fnamelen;
  {
      int		sepcount, len, tflen;
      char_u	*p;
      char_u	*pbuf, *tfname;
      int		hasTilde;
  
      /* Count up the path separators from the RHS.. so we know which part
       * of the path to return. */
      sepcount = 0;
      for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
  	if (vim_ispathsep(*p))
  	    ++sepcount;
  
      /* Need full path first (use expand_env() to remove a "~/") */
      hasTilde = (**fnamep == '~');
      if (hasTilde)
  	pbuf = tfname = expand_env_save(*fnamep);
      else
  	pbuf = tfname = FullName_save(*fnamep, FALSE);
  
      len = tflen = (int)STRLEN(tfname);
  
      if (get_short_pathname(&tfname, &pbuf, &len) == FAIL)
  	return FAIL;
  
      if (len == 0)
      {
  	/* Don't have a valid filename, so shorten the rest of the
  	 * path if we can. This CAN give us invalid 8.3 filenames, but
  	 * there's not a lot of point in guessing what it might be.
  	 */
  	len = tflen;
  	if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == FAIL)
  	    return FAIL;
      }
  
      /* Count the paths backward to find the beginning of the desired string. */
      for (p = tfname + len - 1; p >= tfname; --p)
      {
  #ifdef FEAT_MBYTE
  	if (has_mbyte)
  	    p -= mb_head_off(tfname, p);
  #endif
  	if (vim_ispathsep(*p))
  	{
  	    if (sepcount == 0 || (hasTilde && sepcount == 1))
  		break;
  	    else
  		sepcount --;
  	}
      }
      if (hasTilde)
      {
  	--p;
  	if (p >= tfname)
  	    *p = '~';
  	else
  	    return FAIL;
      }
      else
  	++p;
  
      /* Copy in the string - p indexes into tfname - allocated at pbuf */
      vim_free(*bufp);
      *fnamelen = (int)STRLEN(p);
      *bufp = pbuf;
      *fnamep = p;
  
      return OK;
  }
  #endif /* WIN3264 */
  
  /*
   * Adjust a filename, according to a string of modifiers.
   * *fnamep must be NUL terminated when called.  When returning, the length is
   * determined by *fnamelen.
   * Returns VALID_ flags or -1 for failure.
   * When there is an error, *fnamep is set to NULL.
   */
      int
  modify_fname(src, usedlen, fnamep, bufp, fnamelen)
      char_u	*src;		/* string with modifiers */
      int		*usedlen;	/* characters after src that are used */
      char_u	**fnamep;	/* file name so far */
      char_u	**bufp;		/* buffer for allocated file name or NULL */
      int		*fnamelen;	/* length of fnamep */
  {
      int		valid = 0;
      char_u	*tail;
      char_u	*s, *p, *pbuf;
      char_u	dirname[MAXPATHL];
      int		c;
      int		has_fullname = 0;
  #ifdef WIN3264
      char_u	*fname_start = *fnamep;
      int		has_shortname = 0;
  #endif
  
  repeat:
      /* ":p" - full path/file_name */
      if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
      {
  	has_fullname = 1;
  
  	valid |= VALID_PATH;
  	*usedlen += 2;
  
  	/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
  	if ((*fnamep)[0] == '~'
  #if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
  		&& ((*fnamep)[1] == '/'
  # ifdef BACKSLASH_IN_FILENAME
  		    || (*fnamep)[1] == '\\'
  # endif
  		    || (*fnamep)[1] == NUL)
  
  #endif
  	   )
  	{
  	    *fnamep = expand_env_save(*fnamep);
  	    vim_free(*bufp);	/* free any allocated file name */
  	    *bufp = *fnamep;
  	    if (*fnamep == NULL)
  		return -1;
  	}
  
  	/* When "/." or "/.." is used: force expansion to get rid of it. */
  	for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
  	{
  	    if (vim_ispathsep(*p)
  		    && p[1] == '.'
  		    && (p[2] == NUL
  			|| vim_ispathsep(p[2])
  			|| (p[2] == '.'
  			    && (p[3] == NUL || vim_ispathsep(p[3])))))
  		break;
  	}
  
  	/* FullName_save() is slow, don't use it when not needed. */
  	if (*p != NUL || !vim_isAbsName(*fnamep))
  	{
  	    *fnamep = FullName_save(*fnamep, *p != NUL);
  	    vim_free(*bufp);	/* free any allocated file name */
  	    *bufp = *fnamep;
  	    if (*fnamep == NULL)
  		return -1;
  	}
  
  #ifdef WIN3264
  # if _WIN32_WINNT >= 0x0500
  	if (vim_strchr(*fnamep, '~') != NULL)
  	{
  	    /* Expand 8.3 filename to full path.  Needed to make sure the same
  	     * file does not have two different names.
  	     * Note: problem does not occur if _WIN32_WINNT < 0x0500. */
  	    p = alloc(_MAX_PATH + 1);
  	    if (p != NULL)
  	    {
  		if (GetLongPathName(*fnamep, p, _MAX_PATH))
  		{
  		    vim_free(*bufp);
  		    *bufp = *fnamep = p;
  		}
  		else
  		    vim_free(p);
  	    }
  	}
  # endif
  #endif
  	/* Append a path separator to a directory. */
  	if (mch_isdir(*fnamep))
  	{
  	    /* Make room for one or two extra characters. */
  	    *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
  	    vim_free(*bufp);	/* free any allocated file name */
  	    *bufp = *fnamep;
  	    if (*fnamep == NULL)
  		return -1;
  	    add_pathsep(*fnamep);
  	}
      }
  
      /* ":." - path relative to the current directory */
      /* ":~" - path relative to the home directory */
      /* ":8" - shortname path - postponed till after */
      while (src[*usedlen] == ':'
  		  && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
      {
  	*usedlen += 2;
  	if (c == '8')
  	{
  #ifdef WIN3264
  	    has_shortname = 1; /* Postpone this. */
  #endif
  	    continue;
  	}
  	pbuf = NULL;
  	/* Need full path first (use expand_env() to remove a "~/") */
  	if (!has_fullname)
  	{
  	    if (c == '.' && **fnamep == '~')
  		p = pbuf = expand_env_save(*fnamep);
  	    else
  		p = pbuf = FullName_save(*fnamep, FALSE);
  	}
  	else
  	    p = *fnamep;
  
  	has_fullname = 0;
  
  	if (p != NULL)
  	{
  	    if (c == '.')
  	    {
  		mch_dirname(dirname, MAXPATHL);
  		s = shorten_fname(p, dirname);
  		if (s != NULL)
  		{
  		    *fnamep = s;
  		    if (pbuf != NULL)
  		    {
  			vim_free(*bufp);   /* free any allocated file name */
  			*bufp = pbuf;
  			pbuf = NULL;
  		    }
  		}
  	    }
  	    else
  	    {
  		home_replace(NULL, p, dirname, MAXPATHL, TRUE);
  		/* Only replace it when it starts with '~' */
  		if (*dirname == '~')
  		{
  		    s = vim_strsave(dirname);
  		    if (s != NULL)
  		    {
  			*fnamep = s;
  			vim_free(*bufp);
  			*bufp = s;
  		    }
  		}
  	    }
  	    vim_free(pbuf);
  	}
      }
  
      tail = gettail(*fnamep);
      *fnamelen = (int)STRLEN(*fnamep);
  
      /* ":h" - head, remove "/file_name", can be repeated  */
      /* Don't remove the first "/" or "c:\" */
      while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
      {
  	valid |= VALID_HEAD;
  	*usedlen += 2;
  	s = get_past_head(*fnamep);
  	while (tail > s && after_pathsep(s, tail))
  	    mb_ptr_back(*fnamep, tail);
  	*fnamelen = (int)(tail - *fnamep);
  #ifdef VMS
  	if (*fnamelen > 0)
  	    *fnamelen += 1; /* the path separator is part of the path */
  #endif
  	if (*fnamelen == 0)
  	{
  	    /* Result is empty.  Turn it into "." to make ":cd %:h" work. */
  	    p = vim_strsave((char_u *)".");
  	    if (p == NULL)
  		return -1;
  	    vim_free(*bufp);
  	    *bufp = *fnamep = tail = p;
  	    *fnamelen = 1;
  	}
  	else
  	{
  	    while (tail > s && !after_pathsep(s, tail))
  		mb_ptr_back(*fnamep, tail);
  	}
      }
  
      /* ":8" - shortname  */
      if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
      {
  	*usedlen += 2;
  #ifdef WIN3264
  	has_shortname = 1;
  #endif
      }
  
  #ifdef WIN3264
      /*
       * Handle ":8" after we have done 'heads' and before we do 'tails'.
       */
      if (has_shortname)
      {
  	/* Copy the string if it is shortened by :h and when it wasn't copied
  	 * yet, because we are going to change it in place.  Avoids changing
  	 * the buffer name for "%:8". */
  	if (*fnamelen < (int)STRLEN(*fnamep) || *fnamep == fname_start)
  	{
  	    p = vim_strnsave(*fnamep, *fnamelen);
  	    if (p == NULL)
  		return -1;
  	    vim_free(*bufp);
  	    *bufp = *fnamep = p;
  	}
  
  	/* Split into two implementations - makes it easier.  First is where
  	 * there isn't a full name already, second is where there is. */
  	if (!has_fullname && !vim_isAbsName(*fnamep))
  	{
  	    if (shortpath_for_partial(fnamep, bufp, fnamelen) == FAIL)
  		return -1;
  	}
  	else
  	{
  	    int		l = *fnamelen;
  
  	    /* Simple case, already have the full-name.
  	     * Nearly always shorter, so try first time. */
  	    if (get_short_pathname(fnamep, bufp, &l) == FAIL)
  		return -1;
  
  	    if (l == 0)
  	    {
  		/* Couldn't find the filename, search the paths. */
  		l = *fnamelen;
  		if (shortpath_for_invalid_fname(fnamep, bufp, &l) == FAIL)
  		    return -1;
  	    }
  	    *fnamelen = l;
  	}
      }
  #endif /* WIN3264 */
  
      /* ":t" - tail, just the basename */
      if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
      {
  	*usedlen += 2;
  	*fnamelen -= (int)(tail - *fnamep);
  	*fnamep = tail;
      }
  
      /* ":e" - extension, can be repeated */
      /* ":r" - root, without extension, can be repeated */
      while (src[*usedlen] == ':'
  	    && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
      {
  	/* find a '.' in the tail:
  	 * - for second :e: before the current fname
  	 * - otherwise: The last '.'
  	 */
  	if (src[*usedlen + 1] == 'e' && *fnamep > tail)
  	    s = *fnamep - 2;
  	else
  	    s = *fnamep + *fnamelen - 1;
  	for ( ; s > tail; --s)
  	    if (s[0] == '.')
  		break;
  	if (src[*usedlen + 1] == 'e')		/* :e */
  	{
  	    if (s > tail)
  	    {
  		*fnamelen += (int)(*fnamep - (s + 1));
  		*fnamep = s + 1;
  #ifdef VMS
  		/* cut version from the extension */
  		s = *fnamep + *fnamelen - 1;
  		for ( ; s > *fnamep; --s)
  		    if (s[0] == ';')
  			break;
  		if (s > *fnamep)
  		    *fnamelen = s - *fnamep;
  #endif
  	    }
  	    else if (*fnamep <= tail)
  		*fnamelen = 0;
  	}
  	else				/* :r */
  	{
  	    if (s > tail)	/* remove one extension */
  		*fnamelen = (int)(s - *fnamep);
  	}
  	*usedlen += 2;
      }
  
      /* ":s?pat?foo?" - substitute */
      /* ":gs?pat?foo?" - global substitute */
      if (src[*usedlen] == ':'
  	    && (src[*usedlen + 1] == 's'
  		|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
      {
  	char_u	    *str;
  	char_u	    *pat;
  	char_u	    *sub;
  	int	    sep;
  	char_u	    *flags;
  	int	    didit = FALSE;
  
  	flags = (char_u *)"";
  	s = src + *usedlen + 2;
  	if (src[*usedlen + 1] == 'g')
  	{
  	    flags = (char_u *)"g";
  	    ++s;
  	}
  
  	sep = *s++;
  	if (sep)
  	{
  	    /* find end of pattern */
  	    p = vim_strchr(s, sep);
  	    if (p != NULL)
  	    {
  		pat = vim_strnsave(s, (int)(p - s));
  		if (pat != NULL)
  		{
  		    s = p + 1;
  		    /* find end of substitution */
  		    p = vim_strchr(s, sep);
  		    if (p != NULL)
  		    {
  			sub = vim_strnsave(s, (int)(p - s));
  			str = vim_strnsave(*fnamep, *fnamelen);
  			if (sub != NULL && str != NULL)
  			{
  			    *usedlen = (int)(p + 1 - src);
  			    s = do_string_sub(str, pat, sub, flags);
  			    if (s != NULL)
  			    {
  				*fnamep = s;
  				*fnamelen = (int)STRLEN(s);
  				vim_free(*bufp);
  				*bufp = s;
  				didit = TRUE;
  			    }
  			}
  			vim_free(sub);
  			vim_free(str);
  		    }
  		    vim_free(pat);
  		}
  	    }
  	    /* after using ":s", repeat all the modifiers */
  	    if (didit)
  		goto repeat;
  	}
      }
  
      if (src[*usedlen] == ':' && src[*usedlen + 1] == 'S')
      {
  	p = vim_strsave_shellescape(*fnamep, FALSE, FALSE);
  	if (p == NULL)
  	    return -1;
  	vim_free(*bufp);
  	*bufp = *fnamep = p;
  	*fnamelen = (int)STRLEN(p);
  	*usedlen += 2;
      }
  
      return valid;
  }
  
  /*
   * Perform a substitution on "str" with pattern "pat" and substitute "sub".
   * "flags" can be "g" to do a global substitute.
   * Returns an allocated string, NULL for error.
   */
      char_u *
  do_string_sub(str, pat, sub, flags)
      char_u	*str;
      char_u	*pat;
      char_u	*sub;
      char_u	*flags;
  {
      int		sublen;
      regmatch_T	regmatch;
      int		i;
      int		do_all;
      char_u	*tail;
      char_u	*end;
      garray_T	ga;
      char_u	*ret;
      char_u	*save_cpo;
      char_u	*zero_width = NULL;
  
      /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
      save_cpo = p_cpo;
      p_cpo = empty_option;
  
      ga_init2(&ga, 1, 200);
  
      do_all = (flags[0] == 'g');
  
      regmatch.rm_ic = p_ic;
      regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
      if (regmatch.regprog != NULL)
      {
  	tail = str;
  	end = str + STRLEN(str);
  	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
  	{
  	    /* Skip empty match except for first match. */
  	    if (regmatch.startp[0] == regmatch.endp[0])
  	    {
  		if (zero_width == regmatch.startp[0])
  		{
  		    /* avoid getting stuck on a match with an empty string */
  		    i = MB_PTR2LEN(tail);
  		    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail,
  								   (size_t)i);
  		    ga.ga_len += i;
  		    tail += i;
  		    continue;
  		}
  		zero_width = regmatch.startp[0];
  	    }
  
  	    /*
  	     * Get some space for a temporary buffer to do the substitution
  	     * into.  It will contain:
  	     * - The text up to where the match is.
  	     * - The substituted text.
  	     * - The text after the match.
  	     */
  	    sublen = vim_regsub(&regmatch, sub, tail, FALSE, TRUE, FALSE);
  	    if (ga_grow(&ga, (int)((end - tail) + sublen -
  			    (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
  	    {
  		ga_clear(&ga);
  		break;
  	    }
  
  	    /* copy the text up to where the match is */
  	    i = (int)(regmatch.startp[0] - tail);
  	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
  	    /* add the substituted text */
  	    (void)vim_regsub(&regmatch, sub, (char_u *)ga.ga_data
  					  + ga.ga_len + i, TRUE, TRUE, FALSE);
  	    ga.ga_len += i + sublen - 1;
  	    tail = regmatch.endp[0];
  	    if (*tail == NUL)
  		break;
  	    if (!do_all)
  		break;
  	}
  
  	if (ga.ga_data != NULL)
  	    STRCPY((char *)ga.ga_data + ga.ga_len, tail);
  
  	vim_regfree(regmatch.regprog);
      }
  
      ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
      ga_clear(&ga);
      if (p_cpo == empty_option)
  	p_cpo = save_cpo;
      else
  	/* Darn, evaluating {sub} expression changed the value. */
  	free_string_option(save_cpo);
  
      return ret;
  }
  
  #endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
  