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.
   */
  
  /*
   * NextStep has a problem with configure, undefine a few things:
   */
  #ifdef NeXT
  # ifdef HAVE_UTIME
  #  undef HAVE_UTIME
  # endif
  # ifdef HAVE_SYS_UTSNAME_H
  #  undef HAVE_SYS_UTSNAME_H
  # endif
  #endif
  
  #include <stdio.h>
  #include <ctype.h>
  
  #ifdef VAXC
  # include <types.h>
  # include <stat.h>
  #else
  # include <sys/types.h>
  # include <sys/stat.h>
  #endif
  
  #ifdef HAVE_STDLIB_H
  # include <stdlib.h>
  #endif
  
  #ifdef __EMX__
  # define HAVE_TOTAL_MEM
  #endif
  
  #if defined(__CYGWIN__) || defined(__CYGWIN32__)
  # define WIN32UNIX	/* Compiling for Win32 using Unix files. */
  # define BINARY_FILE_IO
  #endif
  
  /* On AIX 4.2 there is a conflicting prototype for ioctl() in stropts.h and
   * unistd.h.  This hack should fix that (suggested by Jeff George).
   * But on AIX 4.3 it's alright (suggested by Jake Hamby). */
  #if defined(FEAT_GUI) && defined(_AIX) && !defined(_AIX43) && !defined(_NO_PROTO)
  # define _NO_PROTO
  #endif
  
  #ifdef HAVE_UNISTD_H
  # include <unistd.h>
  #endif
  
  #ifdef HAVE_LIBC_H
  # include <libc.h>		    /* for NeXT */
  #endif
  
  #ifdef HAVE_SYS_PARAM_H
  # include <sys/param.h>	    /* defines BSD, if it's a BSD system */
  #endif
  
  /*
   * Sun defines FILE on SunOS 4.x.x, Solaris has a typedef for FILE
   */
  #if defined(sun) && !defined(FILE)
  # define SOLARIS
  #endif
  
  /*
   * Using getcwd() is preferred, because it checks for a buffer overflow.
   * Don't use getcwd() on systems do use system("sh -c pwd").  There is an
   * autoconf check for this.
   * Use getcwd() anyway if getwd() isn't present.
   */
  #if defined(HAVE_GETCWD) && !(defined(BAD_GETCWD) && defined(HAVE_GETWD))
  # define USE_GETCWD
  #endif
  
  #ifndef __ARGS
      /* The AIX VisualAge cc compiler defines __EXTENDED__ instead of __STDC__
       * because it includes pre-ansi features. */
  # if defined(__STDC__) || defined(__GNUC__) || defined(__EXTENDED__)
  #  define __ARGS(x) x
  # else
  #  define __ARGS(x) ()
  # endif
  #endif
  
  /* always use unlink() to remove files */
  #ifndef PROTO
  # ifdef VMS
  #  define mch_remove(x) delete((char *)(x))
  #  define vim_mkdir(x, y) mkdir((char *)(x), y)
  #  ifdef VAX
  #  else
  #   define mch_rmdir(x) rmdir((char *)(x))
  #  endif
  # else
  #  define vim_mkdir(x, y) mkdir((char *)(x), y)
  #  define mch_rmdir(x) rmdir((char *)(x))
  #  define mch_remove(x) unlink((char *)(x))
  # endif
  #endif
  
  /* The number of arguments to a signal handler is configured here. */
  /* It used to be a long list of almost all systems. Any system that doesn't
   * have an argument??? */
  #define SIGHASARG
  
  /* List 3 arg systems here. I guess __sgi, please test and correct me. jw. */
  #if defined(__sgi) && defined(HAVE_SIGCONTEXT)
  # define SIGHAS3ARGS
  #endif
  
  #ifdef SIGHASARG
  # ifdef SIGHAS3ARGS
  #  define SIGPROTOARG	(int, int, struct sigcontext *)
  #  define SIGDEFARG(s)	(s, sig2, scont) int s, sig2; struct sigcontext *scont;
  #  define SIGDUMMYARG	0, 0, (struct sigcontext *)0
  # else
  #  define SIGPROTOARG	(int)
  #  define SIGDEFARG(s)	(s) int s;
  #  define SIGDUMMYARG	0
  # endif
  #else
  # define SIGPROTOARG   (void)
  # define SIGDEFARG(s)  ()
  # define SIGDUMMYARG
  #endif
  
  #ifdef HAVE_DIRENT_H
  # include <dirent.h>
  # ifndef NAMLEN
  #  define NAMLEN(dirent) strlen((dirent)->d_name)
  # endif
  #else
  # define dirent direct
  # define NAMLEN(dirent) (dirent)->d_namlen
  # if HAVE_SYS_NDIR_H
  #  include <sys/ndir.h>
  # endif
  # if HAVE_SYS_DIR_H
  #  include <sys/dir.h>
  # endif
  # if HAVE_NDIR_H
  #  include <ndir.h>
  # endif
  #endif
  
  #if !defined(HAVE_SYS_TIME_H) || defined(TIME_WITH_SYS_TIME)
  # include <time.h>	    /* on some systems time.h should not be
  			       included together with sys/time.h */
  #endif
  #ifdef HAVE_SYS_TIME_H
  # include <sys/time.h>
  #endif
  
  #include <signal.h>
  
  #if defined(DIRSIZ) && !defined(MAXNAMLEN)
  # define MAXNAMLEN DIRSIZ
  #endif
  
  #if defined(UFS_MAXNAMLEN) && !defined(MAXNAMLEN)
  # define MAXNAMLEN UFS_MAXNAMLEN    /* for dynix/ptx */
  #endif
  
  #if defined(NAME_MAX) && !defined(MAXNAMLEN)
  # define MAXNAMLEN NAME_MAX	    /* for Linux before .99p3 */
  #endif
  
  /*
   * Note: if MAXNAMLEN has the wrong value, you will get error messages
   *	 for not being able to open the swap file.
   */
  #if !defined(MAXNAMLEN)
  # define MAXNAMLEN 512		    /* for all other Unix */
  #endif
  
  #define BASENAMELEN	(MAXNAMLEN - 5)
  
  #ifdef HAVE_ERRNO_H
  # include <errno.h>
  #endif
  
  #ifdef HAVE_PWD_H
  # include <pwd.h>
  #endif
  
  #ifdef __COHERENT__
  # undef __ARGS
  #endif
  
  #if (defined(HAVE_SYS_RESOURCE_H) && defined(HAVE_GETRLIMIT)) \
  	|| (defined(HAVE_SYS_SYSINFO_H) && defined(HAVE_SYSINFO)) \
  	|| defined(HAVE_SYSCTL) || defined(HAVE_SYSCONF)
  # define HAVE_TOTAL_MEM
  #endif
  
  #ifdef VMS
  #include <unixio.h>
  #include <unixlib.h>
  #include <signal.h>
  #include <file.h>
  #include <ssdef.h>
  #include <descrip.h>
  #include <libclidef.h>
  #include <lnmdef.h>
  #include <psldef.h>
  #include <prvdef.h>
  #include <dvidef.h>
  #include <dcdef.h>
  #include <stsdef.h>
  #include <iodef.h>
  #include <ttdef.h>
  #include <tt2def.h>
  #include <jpidef.h>
  #include <rms.h>
  #include <trmdef.h>
  #include <string.h>
  #include <starlet.h>
  #include <socket.h>
  #include <lib$routines.h>
  
  typedef struct dsc$descriptor   DESC;
  #endif
  
  /*
   * Unix system-dependent file names
   */
  #ifndef SYS_VIMRC_FILE
  # define SYS_VIMRC_FILE "$VIM/vimrc"
  #endif
  #ifndef SYS_GVIMRC_FILE
  # define SYS_GVIMRC_FILE "$VIM/gvimrc"
  #endif
  #ifndef DFLT_HELPFILE
  # define DFLT_HELPFILE	"$VIMRUNTIME/doc/help.txt"
  #endif
  #ifndef FILETYPE_FILE
  # define FILETYPE_FILE	"filetype.vim"
  #endif
  #ifndef FTPLUGIN_FILE
  # define FTPLUGIN_FILE	"ftplugin.vim"
  #endif
  #ifndef INDENT_FILE
  # define INDENT_FILE	"indent.vim"
  #endif
  #ifndef FTOFF_FILE
  # define FTOFF_FILE	"ftoff.vim"
  #endif
  #ifndef FTPLUGOF_FILE
  # define FTPLUGOF_FILE	"ftplugof.vim"
  #endif
  #ifndef INDOFF_FILE
  # define INDOFF_FILE	"indoff.vim"
  #endif
  #ifndef SYS_MENU_FILE
  # define SYS_MENU_FILE	"$VIMRUNTIME/menu.vim"
  #endif
  
  #ifndef USR_EXRC_FILE
  # ifdef VMS
  #  define USR_EXRC_FILE "sys$login:.exrc"
  # else
  #  define USR_EXRC_FILE "$HOME/.exrc"
  # endif
  #endif
  
  #if !defined(USR_EXRC_FILE2) && defined(OS2)
  # define USR_EXRC_FILE2 "$VIM/.exrc"
  #endif
  #if !defined(USR_EXRC_FILE2) && defined(VMS)
  # define USR_EXRC_FILE2 "sys$login:_exrc"
  #endif
  
  #ifndef USR_VIMRC_FILE
  # ifdef VMS
  # define USR_VIMRC_FILE  "sys$login:.vimrc"
  # else
  #  define USR_VIMRC_FILE "$HOME/.vimrc"
  # endif
  #endif
  
  #if !defined(USR_VIMRC_FILE2) && defined(OS2)
  # define USR_VIMRC_FILE2 "$VIM/.vimrc"
  #endif
  #if !defined(USR_VIMRC_FILE2) && defined(VMS)
  # define USR_VIMRC_FILE2 "sys$login:_vimrc"
  #endif
  
  #ifndef USR_GVIMRC_FILE
  # ifdef VMS
  #  define USR_GVIMRC_FILE "sys$login:.gvimrc"
  # else
  #  define USR_GVIMRC_FILE "$HOME/.gvimrc"
  # endif
  #endif
  
  #ifdef VMS
  # ifndef USR_GVIMRC_FILE2
  #  define USR_GVIMRC_FILE2  "sys$login:_gvimrc"
  # endif
  #endif
  
  #ifndef EVIM_FILE
  # define EVIM_FILE	"$VIMRUNTIME/evim.vim"
  #endif
  
  #ifdef FEAT_VIMINFO
  # ifndef VIMINFO_FILE
  #  ifdef VMS
  #   define VIMINFO_FILE  "sys$login:.viminfo"
  #  else
  #   define VIMINFO_FILE "$HOME/.viminfo"
  #  endif
  # endif
  # if !defined(VIMINFO_FILE2) && defined(OS2)
  #  define VIMINFO_FILE2 "$VIM/.viminfo"
  # endif
  # if !defined(VIMINFO_FILE2) && defined(VMS)
  #  define VIMINFO_FILE2 "sys$login:_viminfo"
  # endif
  #endif
  
  #ifndef EXRC_FILE
  # define EXRC_FILE	".exrc"
  #endif
  
  #ifndef VIMRC_FILE
  # define VIMRC_FILE	".vimrc"
  #endif
  
  #ifdef FEAT_GUI
  # ifndef GVIMRC_FILE
  #  define GVIMRC_FILE	".gvimrc"
  # endif
  #endif
  
  #ifndef SYNTAX_FNAME
  # define SYNTAX_FNAME	"$VIMRUNTIME/syntax/%s.vim"
  #endif
  
  #ifndef DFLT_BDIR
  # ifdef OS2
  #  define DFLT_BDIR     ".,c:/tmp,~/tmp,~/"
  # else
  #  ifdef VMS
  #   define DFLT_BDIR    "./,sys$login:,tmp:"
  #  else
  #   define DFLT_BDIR    ".,~/tmp,~/"    /* default for 'backupdir' */
  #  endif
  # endif
  #endif
  
  #ifndef DFLT_DIR
  # ifdef OS2
  #  define DFLT_DIR      ".,~/tmp,c:/tmp,/tmp"
  # else
  #  ifdef VMS
  #   define DFLT_DIR     "./,sys$login:,tmp:"
  #  else
  #   define DFLT_DIR     ".,~/tmp,/var/tmp,/tmp" /* default for 'directory' */
  #  endif
  # endif
  #endif
  
  #ifndef DFLT_VDIR
  # ifdef OS2
  #  define DFLT_VDIR     "$VIM/vimfiles/view"
  # else
  #  ifdef VMS
  #   define DFLT_VDIR    "sys$login:vimfiles/view"
  #  else
  #   define DFLT_VDIR    "$HOME/.vim/view"       /* default for 'viewdir' */
  #  endif
  # endif
  #endif
  
  #define DFLT_ERRORFILE		"errors.err"
  
  #ifdef OS2
  # define DFLT_RUNTIMEPATH	"$HOME/vimfiles,$VIM/vimfiles,$VIMRUNTIME,$VIM/vimfiles/after,$HOME/vimfiles/after"
  #else
  # ifdef VMS
  #  define DFLT_RUNTIMEPATH      "sys$login:vimfiles,$VIM/vimfiles,$VIMRUNTIME,$VIM/vimfiles/after,sys$login:vimfiles/after"
  # else
  #  ifdef RUNTIME_GLOBAL
  #   define DFLT_RUNTIMEPATH	"~/.vim," RUNTIME_GLOBAL ",$VIMRUNTIME," RUNTIME_GLOBAL "/after,~/.vim/after"
  #  else
  #   define DFLT_RUNTIMEPATH	"~/.vim,$VIM/vimfiles,$VIMRUNTIME,$VIM/vimfiles/after,~/.vim/after"
  #  endif
  # endif
  #endif
  
  #ifdef OS2
  /*
   * Try several directories to put the temp files.
   */
  # define TEMPDIRNAMES	"$TMP", "$TEMP", "c:\\TMP", "c:\\TEMP", ""
  # define TEMPNAMELEN	128
  #else
  # ifdef VMS
  #  ifndef VAX
  #   define VMS_TEMPNAM    /* to fix default .LIS extension */
  #  endif
  #  define TEMPNAME       "TMP:v?XXXXXX.txt"
  #  define TEMPNAMELEN    28
  # else
  #  define TEMPDIRNAMES  "$TMPDIR", "/tmp", ".", "$HOME"
  #  define TEMPNAMELEN    256
  # endif
  #endif
  
  /* Special wildcards that need to be handled by the shell */
  #define SPECIAL_WILDCHAR    "`'{"
  
  #ifndef HAVE_OPENDIR
  # define NO_EXPANDPATH
  #endif
  
  /*
   * Unix has plenty of memory, use large buffers
   */
  #define CMDBUFFSIZE 1024	/* size of the command processing buffer */
  #define MAXPATHL    1024	/* Unix has long paths and plenty of memory */
  
  #define CHECK_INODE		/* used when checking if a swap file already
  				    exists for a file */
  #ifdef VMS  /* Use less memory because of older systems  */
  # ifndef DFLT_MAXMEM
  #  define DFLT_MAXMEM (2*1024)
  # endif
  # ifndef DFLT_MAXMEMTOT
  #  define DFLT_MAXMEMTOT (5*1024)
  # endif
  #else
  # ifndef DFLT_MAXMEM
  #  define DFLT_MAXMEM	(5*1024)	 /* use up to 5 Mbyte for a buffer */
  # endif
  # ifndef DFLT_MAXMEMTOT
  #  define DFLT_MAXMEMTOT	(10*1024)    /* use up to 10 Mbyte for Vim */
  # endif
  #endif
  
  /* memmove is not present on all systems, use memmove, bcopy, memcpy or our
   * own version */
  /* Some systems have (void *) arguments, some (char *). If we use (char *) it
   * works for all */
  #ifdef USEMEMMOVE
  # define mch_memmove(to, from, len) memmove((char *)(to), (char *)(from), len)
  #else
  # ifdef USEBCOPY
  #  define mch_memmove(to, from, len) bcopy((char *)(from), (char *)(to), len)
  # else
  #  ifdef USEMEMCPY
  #   define mch_memmove(to, from, len) memcpy((char *)(to), (char *)(from), len)
  #  else
  #   define VIM_MEMMOVE	    /* found in misc2.c */
  #  endif
  # endif
  #endif
  
  #ifndef PROTO
  # ifdef HAVE_RENAME
  #  define mch_rename(src, dst) rename(src, dst)
  # else
  int mch_rename __ARGS((const char *src, const char *dest));
  # endif
  # ifdef VMS
  #  define mch_chdir(s) chdir(vms_fixfilename(s))
  # else
  #  define mch_chdir(s) chdir(s)
  # endif
  # ifndef VMS
  #  ifdef __MVS__
    /* on OS390 Unix getenv() doesn't return a pointer to persistant
     * storage -> use __getenv() */
  #   define mch_getenv(x) (char_u *)__getenv((char *)(x))
  #  else
  #   define mch_getenv(x) (char_u *)getenv((char *)(x))
  #  endif
  #  define mch_setenv(name, val, x) setenv(name, val, x)
  # endif
  #endif
  
  #if !defined(S_ISDIR) && defined(S_IFDIR)
  # define	S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  #endif
  #if !defined(S_ISREG) && defined(S_IFREG)
  # define	S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
  #endif
  #if !defined(S_ISBLK) && defined(S_IFBLK)
  # define	S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
  #endif
  #if !defined(S_ISSOCK) && defined(S_IFSOCK)
  # define	S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
  #endif
  #if !defined(S_ISFIFO) && defined(S_IFIFO)
  # define	S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
  #endif
  
  /* Note: Some systems need both string.h and strings.h (Savage).  However,
   * some systems can't handle both, only use string.h in that case. */
  #ifdef HAVE_STRING_H
  # include <string.h>
  #endif
  #if defined(HAVE_STRINGS_H) && !defined(NO_STRINGS_WITH_STRING_H)
  # include <strings.h>
  #endif
  
  #if defined(HAVE_SETJMP_H)
  # include <setjmp.h>
  # ifdef HAVE_SIGSETJMP
  #  define JMP_BUF sigjmp_buf
  #  define SETJMP(x) sigsetjmp((x), 1)
  #  define LONGJMP siglongjmp
  # else
  #  define JMP_BUF jmp_buf
  #  define SETJMP(x) setjmp(x)
  #  define LONGJMP longjmp
  # endif
  #endif
  
  #define HAVE_DUP		/* have dup() */
  #define HAVE_ST_MODE		/* have stat.st_mode */
  
  /* We have three kinds of ACL support. */
  #define HAVE_ACL (HAVE_POSIX_ACL || HAVE_SOLARIS_ACL || HAVE_AIX_ACL)
  