text: /*
   * 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.
   */
  
  #ifndef NVIM_GLOBALS_H
  #define NVIM_GLOBALS_H
  
  #include <stdbool.h>
  
  // EXTERN is only defined in main.c. That's where global variables are
  // actually defined and initialized.
  #ifndef EXTERN
  # define EXTERN extern
  # define INIT(x)
  #else
  # ifndef INIT
  #  define INIT(x) x
  #  define DO_INIT
  # endif
  #endif
  
  #include "nvim/ex_eval.h"
  #include "nvim/iconv.h"
  #include "nvim/mbyte.h"
  #include "nvim/menu.h"
  #include "nvim/syntax_defs.h"
  #include "nvim/types.h"
  
  /*
   * definition of global variables
   */
  
  #define IOSIZE         (1024+1)          // file I/O and sprintf buffer size
  
  #define MAX_MCO        6                 // maximum value for 'maxcombine'
  
  # define MSG_BUF_LEN 480                 // length of buffer for small messages
  # define MSG_BUF_CLEN  (MSG_BUF_LEN / 6) // cell length (worst case: utf-8
                                           // takes 6 bytes for one cell)
  
  /*
   * Maximum length of a path (for non-unix systems) Make it a bit long, to stay
   * on the safe side.  But not too long to put on the stack.
   * TODO(metrix78): Move this to os_defs.h
   */
  #ifndef MAXPATHL
  # ifdef MAXPATHLEN
  #  define MAXPATHL  MAXPATHLEN
  # else
  #  define MAXPATHL  256
  # endif
  #endif
  
  
  /* Values for "starting" */
  #define NO_SCREEN       2       /* no screen updating yet */
  #define NO_BUFFERS      1       /* not all buffers loaded yet */
  /*			0	   not starting anymore */
  
  /*
   * Number of Rows and Columns in the screen.
   * Must be long to be able to use them as options in option.c.
   * Note: Use screen_Rows and screen_Columns to access items in ScreenLines[].
   * They may have different values when the screen wasn't (re)allocated yet
   * after setting Rows or Columns (e.g., when starting up).
   */
  EXTERN long Rows                        /* nr of rows in the screen */
  #ifdef DO_INIT
    = 24L
  #endif
  ;
  EXTERN long Columns INIT(= 80);         /* nr of columns in the screen */
  
  /*
   * The characters and attributes cached for the screen.
   */
  typedef char_u schar_T;
  typedef unsigned short sattr_T;
  
  /*
   * The characters that are currently on the screen are kept in ScreenLines[].
   * It is a single block of characters, the size of the screen plus one line.
   * The attributes for those characters are kept in ScreenAttrs[].
   *
   * "LineOffset[n]" is the offset from ScreenLines[] for the start of line 'n'.
   * The same value is used for ScreenLinesUC[] and ScreenAttrs[].
   *
   * Note: before the screen is initialized and when out of memory these can be
   * NULL.
   */
  EXTERN schar_T  *ScreenLines INIT(= NULL);
  EXTERN sattr_T  *ScreenAttrs INIT(= NULL);
  EXTERN unsigned *LineOffset INIT(= NULL);
  EXTERN char_u   *LineWraps INIT(= NULL);        /* line wraps to next line */
  
  /*
   * When using Unicode characters (in UTF-8 encoding) the character in
   * ScreenLinesUC[] contains the Unicode for the character at this position, or
   * NUL when the character in ScreenLines[] is to be used (ASCII char).
   * The composing characters are to be drawn on top of the original character.
   * ScreenLinesC[0][off] is only to be used when ScreenLinesUC[off] != 0.
   * Note: These three are only allocated when enc_utf8 is set!
   */
  EXTERN u8char_T *ScreenLinesUC INIT(= NULL);    /* decoded UTF-8 characters */
  EXTERN u8char_T *ScreenLinesC[MAX_MCO];         /* composing characters */
  EXTERN int Screen_mco INIT(= 0);                /* value of p_mco used when
                                                     allocating ScreenLinesC[] */
  
  /* Only used for euc-jp: Second byte of a character that starts with 0x8e.
   * These are single-width. */
  EXTERN schar_T  *ScreenLines2 INIT(= NULL);
  
  /*
   * Indexes for tab page line:
   *	N > 0 for label of tab page N
   *	N == 0 for no label
   *	N < 0 for closing tab page -N
   *	N == -999 for closing current tab page
   */
  EXTERN short    *TabPageIdxs INIT(= NULL);
  
  EXTERN int screen_Rows INIT(= 0);           /* actual size of ScreenLines[] */
  EXTERN int screen_Columns INIT(= 0);        /* actual size of ScreenLines[] */
  
  /*
   * When vgetc() is called, it sets mod_mask to the set of modifiers that are
   * held down based on the MOD_MASK_* symbols that are read first.
   */
  EXTERN int mod_mask INIT(= 0x0);                /* current key modifiers */
  
  /*
   * Cmdline_row is the row where the command line starts, just below the
   * last window.
   * When the cmdline gets longer than the available space the screen gets
   * scrolled up. After a CTRL-D (show matches), after hitting ':' after
   * "hit return", and for the :global command, the command line is
   * temporarily moved.  The old position is restored with the next call to
   * update_screen().
   */
  EXTERN int cmdline_row;
  
  EXTERN int redraw_cmdline INIT(= FALSE);        /* cmdline must be redrawn */
  EXTERN int clear_cmdline INIT(= FALSE);         /* cmdline must be cleared */
  EXTERN int mode_displayed INIT(= FALSE);        /* mode is being displayed */
  EXTERN int cmdline_star INIT(= FALSE);          /* cmdline is crypted */
  
  EXTERN int exec_from_reg INIT(= FALSE);         /* executing register */
  
  EXTERN int screen_cleared INIT(= FALSE);        /* screen has been cleared */
  
  /*
   * When '$' is included in 'cpoptions' option set:
   * When a change command is given that deletes only part of a line, a dollar
   * is put at the end of the changed text. dollar_vcol is set to the virtual
   * column of this '$'.  -1 is used to indicate no $ is being displayed.
   */
  EXTERN colnr_T dollar_vcol INIT(= -1);
  
  /*
   * Variables for Insert mode completion.
   */
  
  /* Length in bytes of the text being completed (this is deleted to be replaced
   * by the match.) */
  EXTERN int compl_length INIT(= 0);
  
  /* Set when character typed while looking for matches and it means we should
   * stop looking for matches. */
  EXTERN int compl_interrupted INIT(= FALSE);
  
  /* List of flags for method of completion. */
  EXTERN int compl_cont_status INIT(= 0);
  # define CONT_ADDING    1       /* "normal" or "adding" expansion */
  # define CONT_INTRPT    (2 + 4) /* a ^X interrupted the current expansion */
                                  /* it's set only iff N_ADDS is set */
  # define CONT_N_ADDS    4       /* next ^X<> will add-new or expand-current */
  # define CONT_S_IPOS    8       /* next ^X<> will set initial_pos?
                                   * if so, word-wise-expansion will set SOL */
  # define CONT_SOL       16      /* pattern includes start of line, just for
                                   * word-wise expansion, not set for ^X^L */
  # define CONT_LOCAL     32      /* for ctrl_x_mode 0, ^X^P/^X^N do a local
                                   * expansion, (eg use complete=.) */
  
  /*
   * Functions for putting characters in the command line,
   * while keeping ScreenLines[] updated.
   */
  EXTERN int cmdmsg_rl INIT(= FALSE);         /* cmdline is drawn right to left */
  EXTERN int msg_col;
  EXTERN int msg_row;
  EXTERN int msg_scrolled;        /* Number of screen lines that windows have
                                  * scrolled because of printing messages. */
  EXTERN int msg_scrolled_ign INIT(= FALSE);
  /* when TRUE don't set need_wait_return in
     msg_puts_attr() when msg_scrolled is
     non-zero */
  
  EXTERN char_u   *keep_msg INIT(= NULL);     /* msg to be shown after redraw */
  EXTERN int keep_msg_attr INIT(= 0);         /* highlight attr for keep_msg */
  EXTERN int keep_msg_more INIT(= FALSE);      /* keep_msg was set by msgmore() */
  EXTERN int need_fileinfo INIT(= FALSE);     /* do fileinfo() after redraw */
  EXTERN int msg_scroll INIT(= FALSE);        /* msg_start() will scroll */
  EXTERN int msg_didout INIT(= FALSE);        /* msg_outstr() was used in line */
  EXTERN int msg_didany INIT(= FALSE);        /* msg_outstr() was used at all */
  EXTERN int msg_nowait INIT(= FALSE);        /* don't wait for this msg */
  EXTERN int emsg_off INIT(= 0);              /* don't display errors for now,
                                                 unless 'debug' is set. */
  EXTERN int info_message INIT(= FALSE);      /* printing informative message */
  EXTERN int msg_hist_off INIT(= FALSE);      /* don't add messages to history */
  EXTERN int need_clr_eos INIT(= FALSE);      /* need to clear text before
                                                 displaying a message. */
  EXTERN int emsg_skip INIT(= 0);             /* don't display errors for
                                                 expression that is skipped */
  EXTERN int emsg_severe INIT(= FALSE);        /* use message of next of several
                                                  emsg() calls for throw */
  EXTERN int did_endif INIT(= FALSE);         /* just had ":endif" */
  EXTERN dict_T vimvardict;                   /* Dictionary with v: variables */
  EXTERN dict_T globvardict;                  /* Dictionary with g: variables */
  EXTERN int did_emsg;                        /* set by emsg() when the message
                                                 is displayed or thrown */
  EXTERN int did_emsg_syntax;                 /* did_emsg set because of a
                                                 syntax error */
  EXTERN int called_emsg;                     /* always set by emsg() */
  EXTERN int ex_exitval INIT(= 0);            /* exit value for ex mode */
  EXTERN int emsg_on_display INIT(= FALSE);       /* there is an error message */
  EXTERN int rc_did_emsg INIT(= FALSE);       /* vim_regcomp() called emsg() */
  
  EXTERN int no_wait_return INIT(= 0);        /* don't wait for return for now */
  EXTERN int need_wait_return INIT(= 0);      /* need to wait for return later */
  EXTERN int did_wait_return INIT(= FALSE);       /* wait_return() was used and
                                                     nothing written since then */
  EXTERN int need_maketitle INIT(= TRUE);      /* call maketitle() soon */
  
  EXTERN int quit_more INIT(= FALSE);         /* 'q' hit at "--more--" msg */
  #if defined(UNIX) || defined(MACOS_X)
  EXTERN int newline_on_exit INIT(= FALSE);       /* did msg in altern. screen */
  EXTERN int intr_char INIT(= 0);             /* extra interrupt character */
  #endif
  EXTERN int ex_keep_indent INIT(= FALSE);      /* getexmodeline(): keep indent */
  EXTERN int vgetc_busy INIT(= 0);            /* when inside vgetc() then > 0 */
  
  EXTERN int didset_vim INIT(= FALSE);        /* did set $VIM ourselves */
  EXTERN int didset_vimruntime INIT(= FALSE);        /* idem for $VIMRUNTIME */
  
  /*
   * Lines left before a "more" message.	Ex mode needs to be able to reset this
   * after you type something.
   */
  EXTERN int lines_left INIT(= -1);           /* lines left for listing */
  EXTERN int msg_no_more INIT(= FALSE);       /* don't use more prompt, truncate
                                                 messages */
  
  EXTERN char_u   *sourcing_name INIT( = NULL); /* name of error message source */
  EXTERN linenr_T sourcing_lnum INIT(= 0);    /* line number of the source file */
  
  EXTERN int ex_nesting_level INIT(= 0);          /* nesting level */
  EXTERN int debug_break_level INIT(= -1);        /* break below this level */
  EXTERN int debug_did_msg INIT(= FALSE);         /* did "debug mode" message */
  EXTERN int debug_tick INIT(= 0);                /* breakpoint change count */
  
  /* Values for "do_profiling". */
  #define PROF_NONE       0       /* profiling not started */
  #define PROF_YES        1       /* profiling busy */
  #define PROF_PAUSED     2       /* profiling paused */
  EXTERN int do_profiling INIT(= PROF_NONE);      /* PROF_ values */
  
  /*
   * The exception currently being thrown.  Used to pass an exception to
   * a different cstack.  Also used for discarding an exception before it is
   * caught or made pending.  Only valid when did_throw is TRUE.
   */
  EXTERN except_T *current_exception;
  
  /*
   * did_throw: An exception is being thrown.  Reset when the exception is caught
   * or as long as it is pending in a finally clause.
   */
  EXTERN int did_throw INIT(= FALSE);
  
  /*
   * need_rethrow: set to TRUE when a throw that cannot be handled in do_cmdline()
   * must be propagated to the cstack of the previously called do_cmdline().
   */
  EXTERN int need_rethrow INIT(= FALSE);
  
  /*
   * check_cstack: set to TRUE when a ":finish" or ":return" that cannot be
   * handled in do_cmdline() must be propagated to the cstack of the previously
   * called do_cmdline().
   */
  EXTERN int check_cstack INIT(= FALSE);
  
  /*
   * Number of nested try conditionals (across function calls and ":source"
   * commands).
   */
  EXTERN int trylevel INIT(= 0);
  
  /*
   * When "force_abort" is TRUE, always skip commands after an error message,
   * even after the outermost ":endif", ":endwhile" or ":endfor" or for a
   * function without the "abort" flag.  It is set to TRUE when "trylevel" is
   * non-zero (and ":silent!" was not used) or an exception is being thrown at
   * the time an error is detected.  It is set to FALSE when "trylevel" gets
   * zero again and there was no error or interrupt or throw.
   */
  EXTERN int force_abort INIT(= FALSE);
  
  /*
   * "msg_list" points to a variable in the stack of do_cmdline() which keeps
   * the list of arguments of several emsg() calls, one of which is to be
   * converted to an error exception immediately after the failing command
   * returns.  The message to be used for the exception value is pointed to by
   * the "throw_msg" field of the first element in the list.  It is usually the
   * same as the "msg" field of that element, but can be identical to the "msg"
   * field of a later list element, when the "emsg_severe" flag was set when the
   * emsg() call was made.
   */
  EXTERN struct msglist **msg_list INIT(= NULL);
  
  /*
   * suppress_errthrow: When TRUE, don't convert an error to an exception.  Used
   * when displaying the interrupt message or reporting an exception that is still
   * uncaught at the top level (which has already been discarded then).  Also used
   * for the error message when no exception can be thrown.
   */
  EXTERN int suppress_errthrow INIT(= FALSE);
  
  /*
   * The stack of all caught and not finished exceptions.  The exception on the
   * top of the stack is the one got by evaluation of v:exception.  The complete
   * stack of all caught and pending exceptions is embedded in the various
   * cstacks; the pending exceptions, however, are not on the caught stack.
   */
  EXTERN except_T *caught_stack INIT(= NULL);
  
  
  /*
   * Garbage collection can only take place when we are sure there are no Lists
   * or Dictionaries being used internally.  This is flagged with
   * "may_garbage_collect" when we are at the toplevel.
   * "want_garbage_collect" is set by the garbagecollect() function, which means
   * we do garbage collection before waiting for a char at the toplevel.
   * "garbage_collect_at_exit" indicates garbagecollect(1) was called.
   */
  EXTERN int may_garbage_collect INIT(= FALSE);
  EXTERN int want_garbage_collect INIT(= FALSE);
  EXTERN int garbage_collect_at_exit INIT(= FALSE);
  
  /* Special values for current_SID. */
  #define SID_MODELINE    -1      /* when using a modeline */
  #define SID_CMDARG      -2      /* for "--cmd" argument */
  #define SID_CARG        -3      /* for "-c" argument */
  #define SID_ENV         -4      /* for sourcing environment variable */
  #define SID_ERROR       -5      /* option was reset because of an error */
  #define SID_NONE        -6      /* don't set scriptID */
  
  /* ID of script being sourced or was sourced to define the current function. */
  EXTERN scid_T current_SID INIT(= 0);
  // Scope information for the code that indirectly triggered the current
  // provider function call
  EXTERN struct caller_scope {
    scid_T SID;
    uint8_t *sourcing_name, *autocmd_fname, *autocmd_match; 
    linenr_T sourcing_lnum;
    int autocmd_fname_full, autocmd_bufnr;
    void *funccalp;
  } provider_caller_scope;
  EXTERN int provider_call_nesting INIT(= 0);
  
  /* Magic number used for hashitem "hi_key" value indicating a deleted item.
   * Only the address is used. */
  EXTERN char_u hash_removed;
  
  
  EXTERN int scroll_region INIT(= FALSE);      /* term supports scroll region */
  EXTERN int t_colors INIT(= 0);              /* int value of T_CCO */
  
  /*
   * When highlight_match is TRUE, highlight a match, starting at the cursor
   * position.  Search_match_lines is the number of lines after the match (0 for
   * a match within one line), search_match_endcol the column number of the
   * character just after the match in the last line.
   */
  EXTERN int highlight_match INIT(= FALSE);       /* show search match pos */
  EXTERN linenr_T search_match_lines;             /* lines of of matched string */
  EXTERN colnr_T search_match_endcol;             /* col nr of match end */
  
  EXTERN int no_smartcase INIT(= FALSE);          /* don't use 'smartcase' once */
  
  EXTERN int need_check_timestamps INIT(= FALSE);      /* need to check file
                                                          timestamps asap */
  EXTERN int did_check_timestamps INIT(= FALSE);      /* did check timestamps
                                                         recently */
  EXTERN int no_check_timestamps INIT(= 0);       /* Don't check timestamps */
  
  /*
   * Values for index in highlight_attr[].
   * When making changes, also update HL_FLAGS below!  And update the default
   * value of 'highlight' in option.c.
   */
  typedef enum {
    HLF_8 = 0         /* Meta & special keys listed with ":map", text that is
                         displayed different from what it is */
    , HLF_AT          /* @ and ~ characters at end of screen, characters that
                         don't really exist in the text */
    , HLF_D           /* directories in CTRL-D listing */
    , HLF_E           /* error messages */
    , HLF_I           /* incremental search */
    , HLF_L           /* last search string */
    , HLF_M           /* "--More--" message */
    , HLF_CM          /* Mode (e.g., "-- INSERT --") */
    , HLF_N           /* line number for ":number" and ":#" commands */
    , HLF_CLN         /* current line number */
    , HLF_R           /* return to continue message and yes/no questions */
    , HLF_S           /* status lines */
    , HLF_SNC         /* status lines of not-current windows */
    , HLF_C           /* column to separate vertically split windows */
    , HLF_T           /* Titles for output from ":set all", ":autocmd" etc. */
    , HLF_V           /* Visual mode */
    , HLF_VNC         /* Visual mode, autoselecting and not clipboard owner */
    , HLF_W           /* warning messages */
    , HLF_WM          /* Wildmenu highlight */
    , HLF_FL          /* Folded line */
    , HLF_FC          /* Fold column */
    , HLF_ADD         /* Added diff line */
    , HLF_CHD         /* Changed diff line */
    , HLF_DED         /* Deleted diff line */
    , HLF_TXD         /* Text Changed in diff line */
    , HLF_CONCEAL     /* Concealed text */
    , HLF_SC          /* Sign column */
    , HLF_SPB         /* SpellBad */
    , HLF_SPC         /* SpellCap */
    , HLF_SPR         /* SpellRare */
    , HLF_SPL         /* SpellLocal */
    , HLF_PNI         /* popup menu normal item */
    , HLF_PSI         /* popup menu selected item */
    , HLF_PSB         /* popup menu scrollbar */
    , HLF_PST         /* popup menu scrollbar thumb */
    , HLF_TP          /* tabpage line */
    , HLF_TPS         /* tabpage line selected */
    , HLF_TPF         /* tabpage line filler */
    , HLF_CUC         /* 'cursurcolumn' */
    , HLF_CUL         /* 'cursurline' */
    , HLF_MC          /* 'colorcolumn' */
    , HLF_COUNT       /* MUST be the last one */
  } hlf_T;
  
  /* The HL_FLAGS must be in the same order as the HLF_ enums!
   * When changing this also adjust the default for 'highlight'. */
  #define HL_FLAGS {'8', '@', 'd', 'e', 'i', 'l', 'm', 'M', 'n', 'N', 'r', 's', \
                    'S', 'c', 't', 'v', 'V', 'w', 'W', 'f', 'F', 'A', 'C', 'D', \
                    'T', '-', '>', 'B', 'P', 'R', 'L', '+', '=', 'x', 'X', '*', \
                    '#', '_', '!', '.', 'o'}
  
  EXTERN int highlight_attr[HLF_COUNT];       /* Highl. attr for each context. */
  # define USER_HIGHLIGHT
  #ifdef USER_HIGHLIGHT
  EXTERN int highlight_user[9];                   /* User[1-9] attributes */
  EXTERN int highlight_stlnc[9];                  /* On top of user */
  #endif
  EXTERN int cterm_normal_fg_color INIT(= 0);
  EXTERN int cterm_normal_fg_bold INIT(= 0);
  EXTERN int cterm_normal_bg_color INIT(= 0);
  
  EXTERN int autocmd_busy INIT(= FALSE);          /* Is apply_autocmds() busy? */
  EXTERN int autocmd_no_enter INIT(= FALSE);      /* *Enter autocmds disabled */
  EXTERN int autocmd_no_leave INIT(= FALSE);      /* *Leave autocmds disabled */
  EXTERN int modified_was_set;                    /* did ":set modified" */
  EXTERN int did_filetype INIT(= FALSE);          /* FileType event found */
  EXTERN int keep_filetype INIT(= FALSE);         /* value for did_filetype when
                                                     starting to execute
                                                     autocommands */
  
  /* When deleting the current buffer, another one must be loaded.  If we know
   * which one is preferred, au_new_curbuf is set to it */
  EXTERN buf_T    *au_new_curbuf INIT(= NULL);
  
  // When deleting a buffer/window and autocmd_busy is TRUE, do not free the
  // buffer/window. but link it in the list starting with
  // au_pending_free_buf/ap_pending_free_win, using b_next/w_next.
  // Free the buffer/window when autocmd_busy is being set to FALSE.
  EXTERN buf_T *au_pending_free_buf INIT(= NULL);
  EXTERN win_T *au_pending_free_win INIT(= NULL);
  
  /*
   * Mouse coordinates, set by check_termcode()
   */
  EXTERN int mouse_row;
  EXTERN int mouse_col;
  EXTERN bool mouse_past_bottom INIT(= false);    /* mouse below last line */
  EXTERN bool mouse_past_eol INIT(= false);       /* mouse right of line */
  EXTERN int mouse_dragging INIT(= 0);            /* extending Visual area with
                                                     mouse dragging */
  /*
   * When the DEC mouse has been pressed but not yet released we enable
   * automatic querys for the mouse position.
   */
  EXTERN int WantQueryMouse INIT(= FALSE);
  
  
  
  
  /* Value set from 'diffopt'. */
  EXTERN int diff_context INIT(= 6);              /* context for folds */
  EXTERN int diff_foldcolumn INIT(= 2);           /* 'foldcolumn' for diff mode */
  EXTERN int diff_need_scrollbind INIT(= FALSE);
  
  /* The root of the menu hierarchy. */
  EXTERN vimmenu_T        *root_menu INIT(= NULL);
  /*
   * While defining the system menu, sys_menu is TRUE.  This avoids
   * overruling of menus that the user already defined.
   */
  EXTERN int sys_menu INIT(= FALSE);
  
  /* While redrawing the screen this flag is set.  It means the screen size
   * ('lines' and 'rows') must not be changed. */
  EXTERN int updating_screen INIT(= FALSE);
  
  
  
  /*
   * All windows are linked in a list. firstwin points to the first entry,
   * lastwin to the last entry (can be the same as firstwin) and curwin to the
   * currently active window.
   */
  EXTERN win_T    *firstwin;              /* first window */
  EXTERN win_T    *lastwin;               /* last window */
  EXTERN win_T    *prevwin INIT(= NULL);  /* previous window */
  /*
   * When using this macro "break" only breaks out of the inner loop. Use "goto"
   * to break out of the tabpage loop.
   */
  # define FOR_ALL_TAB_WINDOWS(tp, wp) \
    FOR_ALL_TABS(tp) \
      FOR_ALL_WINDOWS_IN_TAB(wp, tp)
  
  # define FOR_ALL_WINDOWS_IN_TAB(wp, tp) \
    for (win_T *wp = ((tp) == curtab) \
                ? firstwin : (tp)->tp_firstwin; wp != NULL; wp = wp->w_next)
  
  EXTERN win_T    *curwin;        /* currently active window */
  
  EXTERN win_T    *aucmd_win;     /* window used in aucmd_prepbuf() */
  EXTERN int aucmd_win_used INIT(= FALSE);        /* aucmd_win is being used */
  
  /*
   * The window layout is kept in a tree of frames.  topframe points to the top
   * of the tree.
   */
  EXTERN frame_T  *topframe;      /* top of the window frame tree */
  
  /*
   * Tab pages are alternative topframes.  "first_tabpage" points to the first
   * one in the list, "curtab" is the current one.
   */
  EXTERN tabpage_T    *first_tabpage;
  EXTERN tabpage_T    *curtab;
  EXTERN int redraw_tabline INIT(= FALSE);           /* need to redraw tabline */
  
  // Iterates over all tabs in the tab list
  # define FOR_ALL_TABS(tp) for (tabpage_T *tp = first_tabpage; tp != NULL; tp = tp->tp_next)
  
  /*
   * All buffers are linked in a list. 'firstbuf' points to the first entry,
   * 'lastbuf' to the last entry and 'curbuf' to the currently active buffer.
   */
  EXTERN buf_T    *firstbuf INIT(= NULL); /* first buffer */
  EXTERN buf_T    *lastbuf INIT(= NULL);  /* last buffer */
  EXTERN buf_T    *curbuf INIT(= NULL);   /* currently active buffer */
  
  // Iterates over all buffers in the buffer list.
  # define FOR_ALL_BUFFERS(buf) for (buf_T *buf = firstbuf; buf != NULL; buf = buf->b_next)
  
  /* Flag that is set when switching off 'swapfile'.  It means that all blocks
   * are to be loaded into memory.  Shouldn't be global... */
  EXTERN int mf_dont_release INIT(= FALSE);       /* don't release blocks */
  
  /*
   * List of files being edited (global argument list).  curwin->w_alist points
   * to this when the window is using the global argument list.
   */
  EXTERN alist_T global_alist;    /* global argument list */
  EXTERN int max_alist_id INIT(= 0);     ///< the previous argument list id
  EXTERN int arg_had_last INIT(= FALSE);      /* accessed last file in
                                                 global_alist */
  
  EXTERN int ru_col;              /* column for ruler */
  EXTERN int ru_wid;              /* 'rulerfmt' width of ruler when non-zero */
  EXTERN int sc_col;              /* column for shown command */
  
  /*
   * When starting or exiting some things are done differently (e.g. screen
   * updating).
   */
  EXTERN int starting INIT(= NO_SCREEN);
  /* first NO_SCREEN, then NO_BUFFERS and then
   * set to 0 when starting up finished */
  EXTERN int exiting INIT(= FALSE);
  /* TRUE when planning to exit Vim.  Might
   * still keep on running if there is a changed
   * buffer. */
  EXTERN int really_exiting INIT(= FALSE);
  /* TRUE when we are sure to exit, e.g., after
   * a deadly signal */
  /* volatile because it is used in signal handler deathtrap(). */
  EXTERN volatile int full_screen INIT(= FALSE);
  /* TRUE when doing full-screen output
   * otherwise only writing some messages */
  
  EXTERN int restricted INIT(= FALSE);
  /* TRUE when started as "rvim" */
  EXTERN int secure INIT(= FALSE);
  /* non-zero when only "safe" commands are
   * allowed, e.g. when sourcing .exrc or .vimrc
   * in current directory */
  
  EXTERN int textlock INIT(= 0);
  /* non-zero when changing text and jumping to
   * another window or buffer is not allowed */
  
  EXTERN int curbuf_lock INIT(= 0);
  /* non-zero when the current buffer can't be
   * changed.  Used for FileChangedRO. */
  EXTERN int allbuf_lock INIT(= 0);
  /* non-zero when no buffer name can be
   * changed, no buffer can be deleted and
   * current directory can't be changed.
   * Used for SwapExists et al. */
  # define HAVE_SANDBOX
  EXTERN int sandbox INIT(= 0);
  /* Non-zero when evaluating an expression in a
   * "sandbox".  Several things are not allowed
   * then. */
  
  EXTERN int silent_mode INIT(= FALSE);
  /* set to TRUE when "-s" commandline argument
   * used for ex */
  
  EXTERN pos_T VIsual;            /* start position of active Visual selection */
  EXTERN int VIsual_active INIT(= FALSE);
  /* whether Visual mode is active */
  EXTERN int VIsual_select INIT(= FALSE);
  /* whether Select mode is active */
  EXTERN int VIsual_reselect;
  /* whether to restart the selection after a
   * Select mode mapping or menu */
  
  EXTERN int VIsual_mode INIT(= 'v');
  /* type of Visual mode */
  
  EXTERN int redo_VIsual_busy INIT(= FALSE);
  /* TRUE when redoing Visual */
  
  /*
   * When pasting text with the middle mouse button in visual mode with
   * restart_edit set, remember where it started so we can set Insstart.
   */
  EXTERN pos_T where_paste_started;
  
  /*
   * This flag is used to make auto-indent work right on lines where only a
   * <RETURN> or <ESC> is typed. It is set when an auto-indent is done, and
   * reset when any other editing is done on the line. If an <ESC> or <RETURN>
   * is received, and did_ai is TRUE, the line is truncated.
   */
  EXTERN int did_ai INIT(= FALSE);
  
  /*
   * Column of first char after autoindent.  0 when no autoindent done.  Used
   * when 'backspace' is 0, to avoid backspacing over autoindent.
   */
  EXTERN colnr_T ai_col INIT(= 0);
  
  /*
   * This is a character which will end a start-middle-end comment when typed as
   * the first character on a new line.  It is taken from the last character of
   * the "end" comment leader when the COM_AUTO_END flag is given for that
   * comment end in 'comments'.  It is only valid when did_ai is TRUE.
   */
  EXTERN int end_comment_pending INIT(= NUL);
  
  /*
   * This flag is set after a ":syncbind" to let the check_scrollbind() function
   * know that it should not attempt to perform scrollbinding due to the scroll
   * that was a result of the ":syncbind." (Otherwise, check_scrollbind() will
   * undo some of the work done by ":syncbind.")  -ralston
   */
  EXTERN int did_syncbind INIT(= FALSE);
  
  /*
   * This flag is set when a smart indent has been performed. When the next typed
   * character is a '{' the inserted tab will be deleted again.
   */
  EXTERN int did_si INIT(= FALSE);
  
  /*
   * This flag is set after an auto indent. If the next typed character is a '}'
   * one indent will be removed.
   */
  EXTERN int can_si INIT(= FALSE);
  
  /*
   * This flag is set after an "O" command. If the next typed character is a '{'
   * one indent will be removed.
   */
  EXTERN int can_si_back INIT(= FALSE);
  
  EXTERN pos_T saved_cursor               /* w_cursor before formatting text. */
  #ifdef DO_INIT
    = INIT_POS_T(0, 0, 0)
  #endif
  ;
  
  /*
   * Stuff for insert mode.
   */
  EXTERN pos_T Insstart;                  /* This is where the latest
                                           * insert/append mode started. */
  
  // This is where the latest insert/append mode started. In contrast to
  // Insstart, this won't be reset by certain keys and is needed for
  // op_insert(), to detect correctly where inserting by the user started.
  EXTERN pos_T Insstart_orig;
  
  /*
   * Stuff for VREPLACE mode.
   */
  EXTERN int orig_line_count INIT(= 0);       /* Line count when "gR" started */
  EXTERN int vr_lines_changed INIT(= 0);      /* #Lines changed by "gR" so far */
  
  
  /*
   * These flags are set based upon 'fileencoding'.
   * Note that "enc_utf8" is also set for "unicode", because the characters are
   * internally stored as UTF-8 (to avoid trouble with NUL bytes).
   */
  # define DBCS_JPN       932     /* japan */
  # define DBCS_JPNU      9932    /* euc-jp */
  # define DBCS_KOR       949     /* korea */
  # define DBCS_KORU      9949    /* euc-kr */
  # define DBCS_CHS       936     /* chinese */
  # define DBCS_CHSU      9936    /* euc-cn */
  # define DBCS_CHT       950     /* taiwan */
  # define DBCS_CHTU      9950    /* euc-tw */
  # define DBCS_2BYTE     1       /* 2byte- */
  # define DBCS_DEBUG     -1
  
  EXTERN int enc_dbcs INIT(= 0);                  /* One of DBCS_xxx values if
                                                     DBCS encoding */
  EXTERN int enc_unicode INIT(= 0);       /* 2: UCS-2 or UTF-16, 4: UCS-4 */
  EXTERN bool enc_utf8 INIT(= false);             /* UTF-8 encoded Unicode */
  EXTERN int enc_latin1like INIT(= TRUE);         /* 'encoding' is latin1 comp. */
  EXTERN int has_mbyte INIT(= 0);                 /* any multi-byte encoding */
  
  
  /*
   * To speed up BYTELEN() we fill a table with the byte lengths whenever
   * enc_utf8 or enc_dbcs changes.
   */
  EXTERN char mb_bytelen_tab[256];
  
  /* Variables that tell what conversion is used for keyboard input and display
   * output. */
  EXTERN vimconv_T input_conv;                    /* type of input conversion */
  EXTERN vimconv_T output_conv;                   /* type of output conversion */
  
  /*
   * Function pointers, used to quickly get to the right function.  Each has
   * three possible values: latin_ (8-bit), utfc_ or utf_ (utf-8) and dbcs_
   * (DBCS).
   * The value is set in mb_init();
   */
  /* length of char in bytes, including following composing chars */
  EXTERN int (*mb_ptr2len)(const char_u *p) INIT(= latin_ptr2len);
  /* idem, with limit on string length */
  EXTERN int (*mb_ptr2len_len)(const char_u *p, int size) INIT(= latin_ptr2len_len);
  /* byte length of char */
  EXTERN int (*mb_char2len)(int c) INIT(= latin_char2len);
  /* convert char to bytes, return the length */
  EXTERN int (*mb_char2bytes)(int c, char_u *buf) INIT(= latin_char2bytes);
  EXTERN int (*mb_ptr2cells)(const char_u *p) INIT(= latin_ptr2cells);
  EXTERN int (*mb_ptr2cells_len)(const char_u *p, int size) INIT(
        = latin_ptr2cells_len);
  EXTERN int (*mb_char2cells)(int c) INIT(= latin_char2cells);
  EXTERN int (*mb_off2cells)(unsigned off, unsigned max_off) INIT(
        = latin_off2cells);
  EXTERN int (*mb_ptr2char)(const char_u *p) INIT(= latin_ptr2char);
  EXTERN int (*mb_head_off)(const char_u *base, const char_u *p) INIT(= latin_head_off);
  
  # if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
  /* Pointers to functions and variables to be loaded at runtime */
  EXTERN size_t (*iconv)(iconv_t cd, const char **inbuf, size_t *inbytesleft,
                         char **outbuf, size_t *outbytesleft);
  EXTERN iconv_t (*iconv_open)(const char *tocode, const char *fromcode);
  EXTERN int (*iconv_close)(iconv_t cd);
  EXTERN int (*iconvctl)(iconv_t cd, int request, void *argument);
  EXTERN int* (*iconv_errno)(void);
  # endif
  
  /*
   * "State" is the main state of Vim.
   * There are other variables that modify the state:
   * "Visual_mode"    When State is NORMAL or INSERT.
   * "finish_op"	    When State is NORMAL, after typing the operator and before
   *		    typing the motion command.
   */
  EXTERN int State INIT(= NORMAL);        /* This is the current state of the
                                           * command interpreter. */
  
  EXTERN int finish_op INIT(= FALSE);     /* TRUE while an operator is pending */
  EXTERN int opcount INIT(= 0);           /* count for pending operator */
  
  /*
   * ex mode (Q) state
   */
  EXTERN int exmode_active INIT(= 0);     /* zero, EXMODE_NORMAL or EXMODE_VIM */
  EXTERN int ex_no_reprint INIT(= FALSE); /* no need to print after z or p */
  
  EXTERN int Recording INIT(= FALSE);     /* TRUE when recording into a reg. */
  EXTERN int Exec_reg INIT(= FALSE);      /* TRUE when executing a register */
  
  EXTERN int no_mapping INIT(= FALSE);    /* currently no mapping allowed */
  EXTERN int no_zero_mapping INIT(= 0);   /* mapping zero not allowed */
  EXTERN int allow_keys INIT(= FALSE);    /* allow key codes when no_mapping
                                           * is set */
  EXTERN int no_u_sync INIT(= 0);         /* Don't call u_sync() */
  EXTERN int u_sync_once INIT(= 0);       /* Call u_sync() once when evaluating
                                             an expression. */
  
  EXTERN int restart_edit INIT(= 0);      /* call edit when next cmd finished */
  EXTERN int arrow_used;                  /* Normally FALSE, set to TRUE after
                                           * hitting cursor key in insert mode.
                                           * Used by vgetorpeek() to decide when
                                           * to call u_sync() */
  EXTERN int ins_at_eol INIT(= FALSE);      /* put cursor after eol when
                                               restarting edit after CTRL-O */
  EXTERN char_u   *edit_submode INIT(= NULL); /* msg for CTRL-X submode */
  EXTERN char_u   *edit_submode_pre INIT(= NULL); /* prepended to edit_submode */
  EXTERN char_u   *edit_submode_extra INIT(= NULL); /* appended to edit_submode */
  EXTERN hlf_T edit_submode_highl;        /* highl. method for extra info */
  EXTERN int ctrl_x_mode INIT(= 0);       /* Which Ctrl-X mode are we in? */
  
  EXTERN int no_abbr INIT(= TRUE);        /* TRUE when no abbreviations loaded */
  
  #ifdef USE_EXE_NAME
  EXTERN char_u   *exe_name;              /* the name of the executable */
  #endif
  
  #ifdef USE_ON_FLY_SCROLL
  EXTERN int dont_scroll INIT(= FALSE);     /* don't use scrollbars when TRUE */
  #endif
  EXTERN int mapped_ctrl_c INIT(= FALSE);      /* CTRL-C is mapped */
  EXTERN bool ctrl_c_interrupts INIT(= true);  /* CTRL-C sets got_int */
  
  EXTERN cmdmod_T cmdmod;                 /* Ex command modifiers */
  
  EXTERN int msg_silent INIT(= 0);        /* don't print messages */
  EXTERN int emsg_silent INIT(= 0);       /* don't print error messages */
  EXTERN int cmd_silent INIT(= FALSE);      /* don't echo the command line */
  
  /* Values for swap_exists_action: what to do when swap file already exists */
  #define SEA_NONE        0       /* don't use dialog */
  #define SEA_DIALOG      1       /* use dialog when possible */
  #define SEA_QUIT        2       /* quit editing the file */
  #define SEA_RECOVER     3       /* recover the file */
  
  #define HAS_SWAP_EXISTS_ACTION
  EXTERN int swap_exists_action INIT(= SEA_NONE);
  /* For dialog when swap file already
   * exists. */
  EXTERN int swap_exists_did_quit INIT(= FALSE);
  /* Selected "quit" at the dialog. */
  
  EXTERN char_u IObuff[IOSIZE];       /* sprintf's are done in this buffer */
  EXTERN char_u NameBuff[MAXPATHL];   /* buffer for expanding file names */
  EXTERN char_u msg_buf[MSG_BUF_LEN]; /* small buffer for messages */
  
  /* When non-zero, postpone redrawing. */
  EXTERN int RedrawingDisabled INIT(= 0);
  
  EXTERN int readonlymode INIT(= FALSE);      /* Set to TRUE for "view" */
  EXTERN int recoverymode INIT(= FALSE);      /* Set to TRUE for "-r" option */
  
  EXTERN typebuf_T typebuf                /* typeahead buffer */
  #ifdef DO_INIT
    = {NULL, NULL, 0, 0, 0, 0, 0, 0, 0}
  #endif
  ;
  EXTERN int ex_normal_busy INIT(= 0);      /* recursiveness of ex_normal() */
  EXTERN int ex_normal_lock INIT(= 0);      /* forbid use of ex_normal() */
  EXTERN int ignore_script INIT(= FALSE);       /* ignore script input */
  EXTERN int stop_insert_mode;            /* for ":stopinsert" and 'insertmode' */
  
  EXTERN int KeyTyped;                    /* TRUE if user typed current char */
  EXTERN int KeyStuffed;                  /* TRUE if current char from stuffbuf */
  #ifdef USE_IM_CONTROL
  EXTERN int vgetc_im_active;             /* Input Method was active for last
                                             character obtained from vgetc() */
  #endif
  EXTERN int maptick INIT(= 0);           /* tick for each non-mapped char */
  
  EXTERN char_u chartab[256];             /* table used in charset.c; See
                                             init_chartab() for explanation */
  
  EXTERN int must_redraw INIT(= 0);           /* type of redraw necessary */
  EXTERN int skip_redraw INIT(= FALSE);       /* skip redraw once */
  EXTERN int do_redraw INIT(= FALSE);         /* extra redraw once */
  
  EXTERN int need_highlight_changed INIT(= TRUE);
  EXTERN char_u   *use_viminfo INIT(= NULL);  /* name of viminfo file to use */
  
  #define NSCRIPT 15
  EXTERN FILE     *scriptin[NSCRIPT];         /* streams to read script from */
  EXTERN int curscript INIT(= 0);             /* index in scriptin[] */
  EXTERN FILE     *scriptout INIT(= NULL);    /* stream to write script to */
  EXTERN int read_cmd_fd INIT(= 0);           /* fd to read commands from */
  
  /* volatile because it is used in signal handler catch_sigint(). */
  EXTERN volatile int got_int INIT(= FALSE);    /* set to TRUE when interrupt
                                                   signal occurred */
  EXTERN int termcap_active INIT(= FALSE);        /* set by starttermcap() */
  EXTERN int cur_tmode INIT(= TMODE_COOK);        /* input terminal mode */
  EXTERN int bangredo INIT(= FALSE);          /* set to TRUE with ! command */
  EXTERN int searchcmdlen;                    /* length of previous search cmd */
  EXTERN int reg_do_extmatch INIT(= 0);       /* Used when compiling regexp:
                                               * REX_SET to allow \z\(...\),
                                               * REX_USE to allow \z\1 et al. */
  EXTERN reg_extmatch_T *re_extmatch_in INIT(= NULL); /* Used by vim_regexec():
                                                       * strings for \z\1...\z\9 */
  EXTERN reg_extmatch_T *re_extmatch_out INIT(= NULL); /* Set by vim_regexec()
                                                        * to store \z\(...\) matches */
  
  EXTERN int did_outofmem_msg INIT(= FALSE);
  /* set after out of memory msg */
  EXTERN int did_swapwrite_msg INIT(= FALSE);
  /* set after swap write error msg */
  EXTERN int undo_off INIT(= FALSE);          /* undo switched off for now */
  EXTERN int global_busy INIT(= 0);           /* set when :global is executing */
  EXTERN int listcmd_busy INIT(= FALSE);      /* set when :argdo, :windo or
                                                 :bufdo is executing */
  EXTERN int need_start_insertmode INIT(= FALSE);
  /* start insert mode soon */
  EXTERN char_u   *last_cmdline INIT(= NULL); /* last command line (for ":) */
  EXTERN char_u   *repeat_cmdline INIT(= NULL); /* command line for "." */
  EXTERN char_u   *new_last_cmdline INIT(= NULL); /* new value for last_cmdline */
  EXTERN char_u   *autocmd_fname INIT(= NULL); /* fname for <afile> on cmdline */
  EXTERN int autocmd_fname_full;               /* autocmd_fname is full path */
  EXTERN int autocmd_bufnr INIT(= 0);          /* fnum for <abuf> on cmdline */
  EXTERN char_u   *autocmd_match INIT(= NULL); /* name for <amatch> on cmdline */
  EXTERN int did_cursorhold INIT(= FALSE);      /* set when CursorHold t'gerd */
  EXTERN pos_T last_cursormoved                 /* for CursorMoved event */
  # ifdef DO_INIT
    = INIT_POS_T(0, 0, 0)
  # endif
  ;
  EXTERN int last_changedtick INIT(= 0);        /* for TextChanged event */
  EXTERN buf_T    *last_changedtick_buf INIT(= NULL);
  
  EXTERN int postponed_split INIT(= 0);       /* for CTRL-W CTRL-] command */
  EXTERN int postponed_split_flags INIT(= 0);       /* args for win_split() */
  EXTERN int postponed_split_tab INIT(= 0);       /* cmdmod.tab */
  EXTERN int g_do_tagpreview INIT(= 0);       /* for tag preview commands:
                                                 height of preview window */
  EXTERN int replace_offset INIT(= 0);        /* offset for replace_push() */
  
  EXTERN char_u   *escape_chars INIT(= (char_u *)" \t\\\"|");
  /* need backslash in cmd line */
  
  EXTERN int keep_help_flag INIT(= FALSE);      /* doing :ta from help file */
  
  /*
   * When a string option is NULL (which only happens in out-of-memory
   * situations), it is set to empty_option, to avoid having to check for NULL
   * everywhere.
   */
  EXTERN char_u   *empty_option INIT(= (char_u *)"");
  
  EXTERN int redir_off INIT(= FALSE);     /* no redirection for a moment */
  EXTERN FILE *redir_fd INIT(= NULL);     /* message redirection file */
  EXTERN int redir_reg INIT(= 0);         /* message redirection register */
  EXTERN int redir_vname INIT(= 0);       /* message redirection variable */
  
  EXTERN char_u langmap_mapchar[256];     /* mapping for language keys */
  
  EXTERN int save_p_ls INIT(= -1);        /* Save 'laststatus' setting */
  EXTERN int save_p_wmh INIT(= -1);       /* Save 'winminheight' setting */
  EXTERN int wild_menu_showing INIT(= 0);
  # define WM_SHOWN       1               /* wildmenu showing */
  # define WM_SCROLLED    2               /* wildmenu showing with scroll */
  
  
  EXTERN char breakat_flags[256];         /* which characters are in 'breakat' */
  
  /* these are in version.c */
  extern char *Version;
  extern char *longVersion;
  
  /*
   * Some file names are stored in pathdef.c, which is generated from the
   * Makefile to make their value depend on the Makefile.
   */
  #ifdef HAVE_PATHDEF
  extern char_u *default_vim_dir;
  extern char_u *default_vimruntime_dir;
  extern char_u *compiled_user;
  extern char_u *compiled_sys;
  #endif
  
  /* When a window has a local directory, the absolute path of the global
   * current directory is stored here (in allocated memory).  If the current
   * directory is not a local directory, globaldir is NULL. */
  EXTERN char_u   *globaldir INIT(= NULL);
  
  /* Characters from 'listchars' option */
  EXTERN int lcs_eol INIT(= '$');
  EXTERN int lcs_ext INIT(= NUL);
  EXTERN int lcs_prec INIT(= NUL);
  EXTERN int lcs_nbsp INIT(= NUL);
  EXTERN int lcs_tab1 INIT(= NUL);
  EXTERN int lcs_tab2 INIT(= NUL);
  EXTERN int lcs_trail INIT(= NUL);
  EXTERN int lcs_conceal INIT(= '-');
  
  /* Characters from 'fillchars' option */
  EXTERN int fill_stl INIT(= ' ');
  EXTERN int fill_stlnc INIT(= ' ');
  EXTERN int fill_vert INIT(= ' ');
  EXTERN int fill_fold INIT(= '-');
  EXTERN int fill_diff INIT(= '-');
  
  /* Whether 'keymodel' contains "stopsel" and "startsel". */
  EXTERN int km_stopsel INIT(= FALSE);
  EXTERN int km_startsel INIT(= FALSE);
  
  EXTERN int cedit_key INIT(= -1);        /* key value of 'cedit' option */
  EXTERN int cmdwin_type INIT(= 0);       /* type of cmdline window or 0 */
  EXTERN int cmdwin_result INIT(= 0);      /* result of cmdline window or 0 */
  
  EXTERN char_u no_lines_msg[] INIT(= N_("--No lines in buffer--"));
  
  /*
   * When ":global" is used to number of substitutions and changed lines is
   * accumulated until it's finished.
   * Also used for ":spellrepall".
   */
  EXTERN long sub_nsubs;          /* total number of substitutions */
  EXTERN linenr_T sub_nlines;     /* total number of lines changed */
  
  /* table to store parsed 'wildmode' */
  EXTERN char_u wim_flags[4];
  
  /* whether titlestring and iconstring contains statusline syntax */
  # define STL_IN_ICON    1
  # define STL_IN_TITLE   2
  EXTERN int stl_syntax INIT(= 0);
  
  /* don't use 'hlsearch' temporarily */
  EXTERN int no_hlsearch INIT(= FALSE);
  
  /* Page number used for %N in 'pageheader' and 'guitablabel'. */
  EXTERN linenr_T printer_page_num;
  
  
  EXTERN int typebuf_was_filled INIT(= FALSE);      /* received text from client
                                                       or from feedkeys() */
  
  
  #if defined(UNIX)
  EXTERN int term_is_xterm INIT(= FALSE);         /* xterm-like 'term' */
  #endif
  
  #if defined(UNIX)
  EXTERN int xterm_conflict_mouse INIT(= FALSE);
  #endif
  
  #ifdef BACKSLASH_IN_FILENAME
  EXTERN char psepc INIT(= '\\');         /* normal path separator character */
  EXTERN char psepcN INIT(= '/');         /* abnormal path separator character */
  EXTERN char pseps[2]                    /* normal path separator string */
  # ifdef DO_INIT
    = {'\\', 0}
  # endif
  ;
  #endif
  
  /* Set to TRUE when an operator is being executed with virtual editing, MAYBE
   * when no operator is being executed, FALSE otherwise. */
  EXTERN int virtual_op INIT(= MAYBE);
  
  /* Display tick, incremented for each call to update_screen() */
  EXTERN disptick_T display_tick INIT(= 0);
  
  /* Line in which spell checking wasn't highlighted because it touched the
   * cursor position in Insert mode. */
  EXTERN linenr_T spell_redraw_lnum INIT(= 0);
  
  /* Set when the cursor line needs to be redrawn. */
  EXTERN int need_cursor_line_redraw INIT(= FALSE);
  
  
  #ifdef USE_MCH_ERRMSG
  /* Grow array to collect error messages in until they can be displayed. */
  EXTERN garray_T error_ga
  # ifdef DO_INIT
    = GA_EMPTY_INIT_VALUE
  # endif
  ;
  #endif
  
  
  /*
   * The error messages that can be shared are included here.
   * Excluded are errors that are only used once and debugging messages.
   */
  EXTERN char_u e_abort[] INIT(= N_("E470: Command aborted"));
  EXTERN char_u e_api_spawn_failed[] INIT(= N_("E903: Could not spawn API job"));
  EXTERN char_u e_argreq[] INIT(= N_("E471: Argument required"));
  EXTERN char_u e_backslash[] INIT(= N_("E10: \\ should be followed by /, ? or &"));
  EXTERN char_u e_cmdwin[] INIT(= N_(
          "E11: Invalid in command-line window; <CR> executes, CTRL-C quits"));
  EXTERN char_u e_curdir[] INIT(= N_(
          "E12: Command not allowed from exrc/vimrc in current dir or tag search"));
  EXTERN char_u e_endif[] INIT(= N_("E171: Missing :endif"));
  EXTERN char_u e_endtry[] INIT(= N_("E600: Missing :endtry"));
  EXTERN char_u e_endwhile[] INIT(= N_("E170: Missing :endwhile"));
  EXTERN char_u e_endfor[] INIT(= N_("E170: Missing :endfor"));
  EXTERN char_u e_while[] INIT(= N_("E588: :endwhile without :while"));
  EXTERN char_u e_for[] INIT(= N_("E588: :endfor without :for"));
  EXTERN char_u e_exists[] INIT(= N_("E13: File exists (add ! to override)"));
  EXTERN char_u e_failed[] INIT(= N_("E472: Command failed"));
  EXTERN char_u e_internal[] INIT(= N_("E473: Internal error"));
  EXTERN char_u e_interr[] INIT(= N_("Interrupted"));
  EXTERN char_u e_invaddr[] INIT(= N_("E14: Invalid address"));
  EXTERN char_u e_invarg[] INIT(= N_("E474: Invalid argument"));
  EXTERN char_u e_invarg2[] INIT(= N_("E475: Invalid argument: %s"));
  EXTERN char_u e_invexpr2[] INIT(= N_("E15: Invalid expression: %s"));
  EXTERN char_u e_invrange[] INIT(= N_("E16: Invalid range"));
  EXTERN char_u e_invcmd[] INIT(= N_("E476: Invalid command"));
  EXTERN char_u e_isadir2[] INIT(= N_("E17: \"%s\" is a directory"));
  EXTERN char_u e_invjob[] INIT(= N_("E900: Invalid job id"));
  EXTERN char_u e_jobtblfull[] INIT(= N_("E901: Job table is full"));
  EXTERN char_u e_jobexe[] INIT(= N_("E902: \"%s\" is not an executable"));
  EXTERN char_u e_libcall[] INIT(= N_("E364: Library call failed for \"%s()\""));
  EXTERN char_u e_markinval[] INIT(= N_("E19: Mark has invalid line number"));
  EXTERN char_u e_marknotset[] INIT(= N_("E20: Mark not set"));
  EXTERN char_u e_modifiable[] INIT(= N_(
          "E21: Cannot make changes, 'modifiable' is off"));
  EXTERN char_u e_nesting[] INIT(= N_("E22: Scripts nested too deep"));
  EXTERN char_u e_noalt[] INIT(= N_("E23: No alternate file"));
  EXTERN char_u e_noabbr[] INIT(= N_("E24: No such abbreviation"));
  EXTERN char_u e_nobang[] INIT(= N_("E477: No ! allowed"));
  EXTERN char_u e_nogvim[] INIT(= N_(
          "E25: GUI cannot be used: Not enabled at compile time"));
  EXTERN char_u e_nogroup[] INIT(= N_("E28: No such highlight group name: %s"));
  EXTERN char_u e_noinstext[] INIT(= N_("E29: No inserted text yet"));
  EXTERN char_u e_nolastcmd[] INIT(= N_("E30: No previous command line"));
  EXTERN char_u e_nomap[] INIT(= N_("E31: No such mapping"));
  EXTERN char_u e_nomatch[] INIT(= N_("E479: No match"));
  EXTERN char_u e_nomatch2[] INIT(= N_("E480: No match: %s"));
  EXTERN char_u e_noname[] INIT(= N_("E32: No file name"));
  EXTERN char_u e_nopresub[] INIT(= N_(
          "E33: No previous substitute regular expression"));
  EXTERN char_u e_noprev[] INIT(= N_("E34: No previous command"));
  EXTERN char_u e_noprevre[] INIT(= N_("E35: No previous regular expression"));
  EXTERN char_u e_norange[] INIT(= N_("E481: No range allowed"));
  EXTERN char_u e_noroom[] INIT(= N_("E36: Not enough room"));
  EXTERN char_u e_notcreate[] INIT(= N_("E482: Can't create file %s"));
  EXTERN char_u e_notmp[] INIT(= N_("E483: Can't get temp file name"));
  EXTERN char_u e_notopen[] INIT(= N_("E484: Can't open file %s"));
  EXTERN char_u e_notread[] INIT(= N_("E485: Can't read file %s"));
  EXTERN char_u e_nowrtmsg[] INIT(= N_(
          "E37: No write since last change (add ! to override)"));
  EXTERN char_u e_nowrtmsg_nobang[] INIT(= N_("E37: No write since last change"));
  EXTERN char_u e_null[] INIT(= N_("E38: Null argument"));
  EXTERN char_u e_number_exp[] INIT(= N_("E39: Number expected"));
  EXTERN char_u e_openerrf[] INIT(= N_("E40: Can't open errorfile %s"));
  EXTERN char_u e_outofmem[] INIT(= N_("E41: Out of memory!"));
  EXTERN char_u e_patnotf[] INIT(= N_("Pattern not found"));
  EXTERN char_u e_patnotf2[] INIT(= N_("E486: Pattern not found: %s"));
  EXTERN char_u e_positive[] INIT(= N_("E487: Argument must be positive"));
  EXTERN char_u e_prev_dir[] INIT(= N_(
          "E459: Cannot go back to previous directory"));
  
  EXTERN char_u e_quickfix[] INIT(= N_("E42: No Errors"));
  EXTERN char_u e_loclist[] INIT(= N_("E776: No location list"));
  EXTERN char_u e_re_damg[] INIT(= N_("E43: Damaged match string"));
  EXTERN char_u e_re_corr[] INIT(= N_("E44: Corrupted regexp program"));
  EXTERN char_u e_readonly[] INIT(= N_(
          "E45: 'readonly' option is set (add ! to override)"));
  EXTERN char_u e_readonlyvar[] INIT(= N_(
          "E46: Cannot change read-only variable \"%s\""));
  EXTERN char_u e_readonlysbx[] INIT(= N_(
          "E794: Cannot set variable in the sandbox: \"%s\""));
  EXTERN char_u e_readerrf[] INIT(= N_("E47: Error while reading errorfile"));
  #ifdef HAVE_SANDBOX
  EXTERN char_u e_sandbox[] INIT(= N_("E48: Not allowed in sandbox"));
  #endif
  EXTERN char_u e_secure[] INIT(= N_("E523: Not allowed here"));
  EXTERN char_u e_screenmode[] INIT(= N_(
          "E359: Screen mode setting not supported"));
  EXTERN char_u e_scroll[] INIT(= N_("E49: Invalid scroll size"));
  EXTERN char_u e_shellempty[] INIT(= N_("E91: 'shell' option is empty"));
  EXTERN char_u e_signdata[] INIT(= N_("E255: Couldn't read in sign data!"));
  EXTERN char_u e_swapclose[] INIT(= N_("E72: Close error on swap file"));
  EXTERN char_u e_tagstack[] INIT(= N_("E73: tag stack empty"));
  EXTERN char_u e_toocompl[] INIT(= N_("E74: Command too complex"));
  EXTERN char_u e_longname[] INIT(= N_("E75: Name too long"));
  EXTERN char_u e_toomsbra[] INIT(= N_("E76: Too many ["));
  EXTERN char_u e_toomany[] INIT(= N_("E77: Too many file names"));
  EXTERN char_u e_trailing[] INIT(= N_("E488: Trailing characters"));
  EXTERN char_u e_umark[] INIT(= N_("E78: Unknown mark"));
  EXTERN char_u e_wildexpand[] INIT(= N_("E79: Cannot expand wildcards"));
  EXTERN char_u e_winheight[] INIT(= N_(
          "E591: 'winheight' cannot be smaller than 'winminheight'"));
  EXTERN char_u e_winwidth[] INIT(= N_(
          "E592: 'winwidth' cannot be smaller than 'winminwidth'"));
  EXTERN char_u e_write[] INIT(= N_("E80: Error while writing"));
  EXTERN char_u e_zerocount[] INIT(= N_("Zero count"));
  EXTERN char_u e_usingsid[] INIT(= N_("E81: Using <SID> not in a script context"));
  EXTERN char_u e_intern2[] INIT(= N_("E685: Internal error: %s"));
  EXTERN char_u e_maxmempat[] INIT(= N_(
          "E363: pattern uses more memory than 'maxmempattern'"));
  EXTERN char_u e_emptybuf[] INIT(= N_("E749: empty buffer"));
  
  EXTERN char_u e_invalpat[] INIT(= N_(
          "E682: Invalid search pattern or delimiter"));
  EXTERN char_u e_bufloaded[] INIT(= N_("E139: File is loaded in another buffer"));
  EXTERN char_u e_notset[] INIT(= N_("E764: Option '%s' is not set"));
  EXTERN char_u e_invalidreg[] INIT(= N_("E850: Invalid register name"));
  
  
  EXTERN char top_bot_msg[] INIT(= N_("search hit TOP, continuing at BOTTOM"));
  EXTERN char bot_top_msg[] INIT(= N_("search hit BOTTOM, continuing at TOP"));
  
  /* For undo we need to know the lowest time possible. */
  EXTERN time_t starttime;
  
  EXTERN FILE *time_fd INIT(= NULL);  /* where to write startup timing */
  
  /*
   * Some compilers warn for not using a return value, but in some situations we
   * can't do anything useful with the value.  Assign to this variable to avoid
   * the warning.
   */
  EXTERN int ignored;
  EXTERN char *ignoredp;
  
  /* Temporarily moved these static variables to assist in migrating from
   * os_unix.c */
  EXTERN int curr_tmode INIT(= TMODE_COOK); /* contains current terminal mode */
  
  // If a msgpack-rpc channel should be started over stdin/stdout
  EXTERN bool embedded_mode INIT(= false);
  
  /// Used to track the status of external functions.
  /// Currently only used for iconv().
  typedef enum {
    kUnknown,
    kWorking,
    kBroken
  } WorkingStatus;
  
  #endif /* NVIM_GLOBALS_H */
  