/*
 * vile -- "vi like emacs"
 *
 * this used to be MicroEMACS, a public domain program written by
 * dave g. conroy, further improved and modified by daniel m. lawrence.
 *
 * the original author of vile is paul fox.  tom dickey and kevin
 * buettner made huge contributions along the way, as did rick
 * sladkey and other people (see all of the CHANGES files for
 * details).  vile is now principally maintained by tom dickey.
 *
 * previous versions of vile were limited to non-commercial use due to
 * their inclusion of code from versions of MicroEMACS which were
 * restricted in that way.  in the current version of vile, every
 * attempt has been made to ensure that this later code has been
 * removed or rewritten, returning vile's original basis to freely
 * distributable status.  This version of vile is distributed under the
 * terms of the GNU Public License (see COPYING).
 *
 * Copyright (c) 1992-2000 by Paul Fox and Thomas Dickey
 *
 */

/*
 * $Header: /usr/build/vile/vile/RCS/main.c,v 1.435 2000/11/04 21:06:05 tom Exp $
 */

#define realdef /* Make global definitions not external */

#ifdef _WIN32
# include	<windows.h>
#endif

#include	"estruct.h"	/* global structures and defines */
#include	"edef.h"	/* global declarations */
#include	"nevars.h"
#include	"nefunc.h"
#include	"nefsms.h"

#if OPT_LOCALE
#include	<locale.h>
#include	<ctype.h>
#endif

#if CC_NEWDOSCC
#include <io.h>
#if CC_DJGPP
#include <dpmi.h>
#include <go32.h>
#endif
#endif

#if SYS_VMS
#include <processes.h>
#endif

extern char *exec_pathname;
extern const char *const pathname[];	/* startup file path/name array */

/* if on a crippled system, try to survive: bigger stack */
#if	SYS_MSDOS && CC_TURBO
unsigned _stklen = 24000U;
#endif

static	int	cmd_mouse_motion (const CMDFUNC *cfp);
static	void	get_executable_dir (void);
static	void	global_val_init (void);
static	void	loop (void);
static	void	make_startup_file (char *name);
static	void	siginit (void);
static	void	start_debug_log (int ac, char **av);

extern const int nametblsize;

/*--------------------------------------------------------------------------*/
#define	GetArgVal(param)	if (!*(++param))\
					param = argv[++carg];\
				if (param == 0)\
					print_usage()

int
MainProgram(int argc, char *argv[])
{
	int tt_opened;
	register BUFFER *bp;
	register int	carg;		/* current arg to scan */
	char *vileinit = NULL;		/* the startup file or VILEINIT var */
	int startstat = TRUE;		/* result of running startup */
	BUFFER *havebp = NULL;		/* initial buffer to read */
	char *havename = NULL;		/* name of first buffer in cmd line */
	int gotoflag = FALSE;		/* do we need to goto line at start? */
	int gline = FALSE;		/* if so, what line? */
	int helpflag = FALSE;		/* do we need help at start? */
	REGEXVAL *search_exp = 0;	/* initial search-pattern */
	const char *msg;
#if SYS_VMS
	char *init_descrip = NULL;
#endif
#ifdef VILE_OLE
	int ole_register = FALSE;
#endif
#if DISP_X11 && !XTOOLKIT
	int do_newgroup = FALSE;	/* do we spawn at start? */
#endif
#if OPT_TAGS
	int didtag = FALSE;		/* look up a tag to start? */
	char *tname = NULL;
#endif
#ifdef DISP_NTCONS
	int new_console = FALSE;
#endif
#if	OPT_ENCRYPT
	char startkey[NKEYLEN];		/* initial encryption key */
	*startkey = EOS;
#endif

#if OPT_LOCALE
	setlocale(LC_CTYPE, "");
#endif

#if OPT_NAMEBST
	build_namebst(nametbl, 0, nametblsize - 1);
#endif
	global_val_init();	/* global buffer values */
	charinit();		/* character types -- we need these early  */
	winit(FALSE);		/* command-line */
#if !SYS_UNIX
	expand_wild_args(&argc, &argv);
#endif
	prog_arg = argv[0];	/* this contains our only clue to exec-path */
#if SYS_MSDOS || SYS_OS2 || SYS_OS2_EMX || SYS_WINNT
	if (strchr(pathleaf(prog_arg), '.') == 0) {
		char *t = malloc(strlen(prog_arg) + 5);
		lsprintf(t, "%s.exe", prog_arg);
		prog_arg = t;
	}
#endif

	start_debug_log(argc,argv);

	get_executable_dir();

	if (strcmp(pathleaf(prog_arg), "view") == 0)
		set_global_b_val(MDREADONLY,TRUE);

#if DISP_X11
	if (argc != 2 || strcmp(argv[1], "-V") != 0) {
		if (x_preparse_args(&argc, &argv) != TRUE)
			startstat = FALSE;
	}
#endif
	/*
	 * Allow for I/O to the command-line before we initialize the screen
	 * driver.
	 *
	 * FIXME: we only know how to do this for displays that open the
	 * terminal in the same way for command-line and screen.
	 */
	siginit();
#if OPT_DUMBTERM
	if (isatty(fileno(stdin))
	 && isatty(fileno(stdout))) {
		tt_opened = open_terminal(&dumb_term);
	} else
#endif
	 tt_opened = open_terminal(&null_term);

	/* Parse the passed in parameters */
	for (carg = 1; carg < argc; ++carg) {
		register char *param = argv[carg];
#if DISP_X11 && !XTOOLKIT
		if (*param == '=') {
			x_set_geometry(param);
			continue;
		}
#endif

		/* evaluate switches */
		if (*param == '-') {
			++param;
#if DISP_IBMPC || DISP_BORLAND || SYS_VMS
			/* if it's a digit, it's probably a screen
				resolution */
			if (isDigit(*param)) {
#if DISP_IBMPC || DISP_BORLAND
				current_res_name = param;
#else
				if (strcmp(param, "132") == 0)
					init_descrip = "WIDE";
				else if (strcmp(param, "80") == 0)
					init_descrip = "NORMAL";
				else
					print_usage();
#endif
				continue;
			} else
#endif	/* DISP_IBMPC */
			switch (*param) {
#if DISP_X11 && !XTOOLKIT
			case 'd':
				if ((param = argv[++carg]) != 0)
					x_set_dpy(param);
				else
					print_usage();
				break;
			case 'r':
				x_set_rv();
				break;
			case 'f':
				if (argv[++carg] != 0) {
					if (strcmp(param, "foreground") == 0
					 || strcmp(param, "fg") == 0)
						x_setforeground(argv[carg]);
					else if (!strcmp(param, "fork"))
						do_newgroup = TRUE;
					else
						x_setfont(argv[carg]);
				} else
					print_usage();
				break;
			case 'b':
				if (argv[++carg] != 0) {
					if (strcmp(param, "background") == 0
					 || strcmp(param, "bg") == 0)
						x_setbackground(argv[carg]);
				} else
					print_usage();
				break;
			case 'n':
				if (strcmp(param, "name") == 0
				 && argv[++carg] != 0)
					x_setname(argv[carg]);
				else
					print_usage();
				break;
			case 'w':
				if (strcmp(param, "wm") == 0
				 && argv[++carg] != 0)
					x_set_wm_title(argv[carg]);
				else
					print_usage();
				break;
#endif /* DISP_X11 */
#if DISP_NTCONS
			case 'c':
				if (strcmp(param, "console") == 0) {
				    /* 
				     * start editor in a new console env if
				     * stdin is redirected.  if this option
				     * is not set when stdin is redirected,
				     * console vile's mouse features are
				     * unavailable (bug).
				     */

				    new_console = TRUE;
				}
				else
					print_usage();
				break;
#endif /* DISP_NTCONS */
			case 'e':	/* -e for Edit file */
			case 'E':
				set_global_b_val(MDVIEW,FALSE);
				break;
			case 'g':	/* -g for initial goto */
			case 'G':
				gotoflag = TRUE;
				GetArgVal(param);
				gline = atoi(param);
				break;
			case 'h':	/* -h for initial help */
			case 'H':
				helpflag = TRUE;
				break;

			case 'i':
			case 'I':
				vileinit = "vileinit.rc";
				/*
				 * If the user has no startup file, make a simple
				 * one that points to this one.
				 */
				if (cfg_locate(vileinit, LOCATE_SOURCE) != 0
				 && cfg_locate(startup_file, LOCATE_SOURCE) == 0)
					make_startup_file(vileinit);
				break;

#if	OPT_ENCRYPT
			case 'k':	/* -k<key> for code key */
			case 'K':
				GetArgVal(param);
				vl_make_encrypt_key(startkey, param);
				break;
#endif
#ifdef VILE_OLE
			case 'O':
				if (param[1] == 'r')
					ole_register = TRUE;
				else
					print_usage();
				break;
#endif
			case 's':  /* -s <pattern> */
			case 'S':
		dosearch:
				GetArgVal(param);
				search_exp = new_regexval(param,
						global_b_val(MDMAGIC));
				break;
#if OPT_TAGS
			case 't':  /* -t for initial tag lookup */
			case 'T':
				GetArgVal(param);
				tname = param;
				break;
#endif
			case 'v':	/* -v is view mode */
				set_global_b_val(MDVIEW,TRUE);
				break;

			case 'R':	/* -R is readonly mode */
				set_global_b_val(MDREADONLY,TRUE);
				break;

			case 'V':
#if DISP_NTWIN
				gui_version(prog_arg);
#else
				(void)printf("%s\n", getversion());
#endif
				tidy_exit(GOODEXIT);
				/* NOTREACHED */

			case '?':
				/* FALLTHRU */
			default:	/* unknown switch */
				print_usage();
			}

		} else if (*param == '+') { /* alternate form of -g */
			if (*(++param) == '/') {
				int len = strlen(param);
				if (len > 0 && param[len-1] == '/')
					param[--len] = EOS;
				if (len == 0)
					print_usage();
				goto dosearch;
			}
			gotoflag = TRUE;
			gline = atoi(param);
		} else if (*param == '@') {
			vileinit = ++param;
		} else if (*param != EOS) {

			/* must be a filename */
#if OPT_ENCRYPT
			cryptkey = (*startkey != EOS) ? startkey : 0;
#endif
			/* set up a buffer for this file */
			bp = getfile2bp(param,FALSE,TRUE);
			if (bp) {
				bp->b_flag |= BFARGS;	/* treat this as an argument */
				make_current(bp); /* pull it to the front */
				if (!havebp) {
					havebp = bp;
					havename = param;
				}
			}
#if OPT_ENCRYPT
			cryptkey = 0;
#endif
		}
	}
#ifdef VILE_OLE
	if (ole_register)
	{
		/*
		 * Now that all command line options have been successfully
		 * parsed, register the OLE automation server and exit.
		 */

		ntwinio_oleauto_reg();
		/* NOT REACHED */
	}
#endif


	/* if stdin isn't a terminal, assume the user is trying to pipe a
	 * file into a buffer.
	 */
#if SYS_UNIX || SYS_VMS || SYS_MSDOS || SYS_OS2 || SYS_WINNT
#if DISP_NTWIN
	if (stdin_data_available())
#else
	if (!isatty(fileno(stdin)))
#endif
	{

#if !DISP_X11
#if SYS_UNIX
# if HAVE_TTYNAME
		char	*tty = ttyname(fileno(stderr));
# else
		char	*tty = "/dev/tty";
# endif
#else
		FILE	*in;
		int	fd;
#endif /* SYS_UNIX */
#endif /* DISP_X11 */
		BUFFER	*lastbp = havebp;
		int	nline = 0;

		bp = bfind(STDIN_BufName, BFARGS);
		make_current(bp); /* pull it to the front */
		if (!havebp)
			havebp = bp;
		ffp = fdopen(dup(fileno(stdin)), "r");
#if !DISP_X11
# if SYS_UNIX
		/*
		 * Note: On Linux, the low-level close/dup operation
		 * doesn't work, since something hangs, apparently
		 * because substituting the file descriptor doesn't communicate
		 * properly up to the stdio routines.
		 */
		if ((freopen(tty, "r", stdin)) == 0
		 || !isatty(fileno(stdin))) {
			fprintf(stderr, "cannot open a terminal (%s)\n", tty);
			tidy_exit(BADEXIT);
		}
#else
# if SYS_WINNT
#  if DISP_NTCONS
		if (new_console) {
		    if (FreeConsole()) {
			if (! AllocConsole()) {
			    fputs("unable to allocate new console\n", stderr);
			    tidy_exit(BADEXIT);
			}
		    }
		    else {
			fputs("unable to release existing console\n", stderr);
			tidy_exit(BADEXIT);
		    }
		}

		/*
		 * The editor must reopen the console, not fd 0.  If the console
		 * is not reopened, the nt console I/O routines die immediately
		 * when attempting to fetch a STDIN handle.
		 */
		freopen("con", "r", stdin);
#  endif
# else
#  if SYS_VMS
		fd = open("tt:", O_RDONLY, S_IREAD); /* or sys$command */
#  else					/* e.g., DOS-based systems */
		fd = fileno(stderr);	/* this normally cannot be redirected */
#  endif
		if ((fd >= 0)
		 && (close(0) >= 0)
		 && (fd = dup(fd)) == 0
		 && (in = fdopen(fd, "r")) != 0)
			*stdin = *in;
#  endif /* SYS_WINNT */
# endif /* SYS_UNIX */
#endif /* DISP_X11 */

#if	OPT_ENCRYPT
		if (*startkey != EOS) {
			strcpy(bp->b_cryptkey, startkey);
			make_local_b_val(bp, MDCRYPT);
			set_b_val(bp, MDCRYPT, TRUE);
		}
#endif
		(void)slowreadf(bp, &nline);
		set_rdonly(bp, bp->b_fname, MDREADONLY);
		(void)ffclose();

		if (is_empty_buf(bp)) {
			(void)zotbuf(bp);
			curbp = havebp = lastbp;
		}
#if OPT_FINDERR
		  else {
			set_febuff(bp->b_bname);
		}
#endif
	}
#endif

#if DISP_X11 && !XTOOLKIT
	if (do_newgroup)
		(void) newprocessgroup(TRUE,1);
#endif

	if (!tt_opened)
		siginit();
	(void)open_terminal((TERM *)0);
	term.kopen();		/* open the keyboard */
	term.rev(FALSE);

	/*
	 * The terminal driver sets default colors and $palette during the
	 * open_terminal function.  Save that information as the 'default'
	 * color scheme.  We have to do this before reading .vilerc
	 */
#if OPT_COLOR_SCHEMES
	init_scheme();
#endif

	if (vtinit() != TRUE)	/* allocate display memory */
		tidy_exit(BADEXIT);

	winit(TRUE);		/* windows */

	/* this comes out to 70 on an 80 (or greater) column display */
	{	register int fill;
		fill = (7 * term.cols) / 8;  /* must be done after vtinit() */
		if (fill > 70) fill = 70;
		set_global_b_val(VAL_FILL, fill);
	}

	/* Create an unnamed buffer, so that the initialization-file will have
	 * something to work on.  We don't pull in any of the command-line
	 * filenames yet, because some of the initialization stuff has to be
	 * triggered by switching buffers after reading the .vilerc file.
	 *
	 * If nothing modifies it, this buffer will be automatically removed
	 * when we switch to the first file (i.e., havebp), because it is
	 * empty (and presumably isn't named the same as an actual file).
	 */
	bp = bfind(UNNAMED_BufName, 0);
	bp->b_active = TRUE;
#if OPT_DOSFILES
	/* an empty non-existent buffer defaults to line-style
		favored by the OS */
	make_local_b_val(bp, MDDOS);
	set_b_val(bp, MDDOS, CRLF_LINES);
#endif
	fix_cmode(bp, FALSE);
	swbuffer(bp);

	/* run the specified, or the system startup file here.
	   if vileinit is set, it's the name of the user's
	   command-line startup file, i.e. 'vile @mycmds'
	 */
	if (vileinit && *vileinit) {
		if (do_source(vileinit,1, FALSE) != TRUE) {
			startstat = FALSE;
			goto begin;
		}
		free(startup_file);
		startup_file = strmalloc(vileinit);
	} else {

		/* else vileinit is the contents of their VILEINIT variable */
		vileinit = getenv("VILEINIT");
		if (vileinit != NULL) { /* set... */
			BUFFER *vbp, *obp;
			UINT oflags = 0;
			if (*vileinit) { /* ...and not null */
				/* mark as modified, to prevent
				 * undispbuff() from clobbering */
				obp = curbp;
				if (obp) {
					oflags = obp->b_flag;
					b_set_changed(obp);
				}

				if ((vbp=bfind(VILEINIT_BufName, BFEXEC)) == 0)
					tidy_exit(BADEXIT);

				/* don't want swbuffer to try to read it */
				vbp->b_active = TRUE;
				swbuffer(vbp);
				b_set_scratch(vbp);
				bprintf("%s", vileinit);
				/* if we leave it scratch, swbuffer(obp)
					may zot it, and we may zot it again */
				b_clr_scratch(vbp);
				set_rdonly(vbp, vbp->b_fname, MDVIEW);

				/* go execute it! */
				if (dobuf(vbp, 1) != TRUE) {
					startstat = FALSE;
					goto begin;
				}
				if (obp) {
					swbuffer(obp);
					obp->b_flag = oflags;
				}
				/* remove the now unneeded buffer */
				b_set_scratch(vbp);  /* make sure it will go */
				(void)zotbuf(vbp);
			}
		} else {  /* find and run .vilerc */
			if (do_source(startup_file, 1, TRUE) != TRUE) {
				startstat = FALSE;
				goto begin;
			}
		}
	}

	/*
	 * before reading, double-check, since a startup-script may
	 * have removed the first buffer.
	 */
	if (havebp && find_bp(havebp)) {
		if (find_bp(bp) && is_empty_buf(bp) && !b_is_changed(bp))
			b_set_scratch(bp);	/* remove the unnamed-buffer */
		if (swbuffer(havebp) == TRUE) {
#if OPT_MAJORMODE && OPT_HOOKS
			/*
			 * Partial fix in case we edit .vilerc (vile.rc) or
			 * filters.rc, or related files that initialize syntax
			 * highlighting.
			 */
			VALARGS args;
			setm_by_suffix(curbp);
			setm_by_preamble(curbp);
			if (find_mode(curbp, "vilemode", FALSE, &args) == TRUE)
				run_readhook();
#else
			;
#endif
		} else {
			startstat = FALSE;
		}
		if (havename)
			set_last_file_edited(havename);
		if (bp2any_wp(bp) && bp2any_wp(havebp))
			zotwp(bp);
	}
#if OPT_TAGS
	else if (tname) {
		cmdlinetag(tname);
		didtag = TRUE;
	}
#endif
	msg = s_NULL;
	if (helpflag) {
		if (vl_help(TRUE,1) != TRUE) {
			msg =
	"[Problem with help information. Type \":quit\" to exit if you wish]";
		}
	} else {
		msg = "[Use ^A-h, ^X-h, or :help to get help]";
	}

	/* honor command-line actions */
	if (gotoflag + (search_exp != 0)
#if OPT_TAGS
		 + (tname?1:0)
#endif
		> 1) {
#if OPT_TAGS
		msg = "[Search, goto and tag are used one at a time]";
#else
		msg = "[Cannot search and goto at the same time]";
#endif
	} else if (gotoflag) {
		if (gotoline(gline != 0, gline) == FALSE) {
			msg = "[Not that many lines in buffer]";
			(void)gotoeob(FALSE,1);
		}
	} else if (search_exp) {
		FreeIfNeeded(gregexp);
		(void)strncpy0(searchpat, search_exp->pat, NPAT);
		gregexp = search_exp->reg;
		(void)forwhunt(FALSE, 0);
#if OPT_TAGS
	} else if (tname && !didtag) {
		cmdlinetag(tname);
#endif
	}

#if OPT_POPUP_MSGS
	purge_msgs();
#endif
	if (startstat == TRUE)  /* else there's probably an error message */
		mlforce(msg);

begin:
#if SYS_VMS
	if (init_descrip)
	{
		/*
		 * All terminal inits are complete.  Switch to new screen
		 * resolution specified from command line.
		 */
		(void) term.setdescrip(init_descrip);
	}
#endif
	(void)update(FALSE);

#if DISP_NTWIN
	/* Draw winvile's main window, for the very first time. */
	winvile_start();
#endif

#if OPT_POPUP_MSGS
	if (global_g_val(GMDPOPUP_MSGS) && (startstat != TRUE)) {
		bp = bfind(MESSAGES_BufName, BFSCRTCH);
		bsizes(bp);
		TRACE(("Checking size of popup messages: %d\n", bp->b_linecount));
		if (bp->b_linecount > 1) {
			popup_msgs();
			*mlsave = EOS;
		}
	}
	if (global_g_val(GMDPOPUP_MSGS) == -TRUE)
		set_global_g_val(GMDPOPUP_MSGS, FALSE);
#endif

#ifdef GMDCD_ON_OPEN
	/* reset a one-shot, e.g., for winvile's drag/drop code */
	if (global_g_val(GMDCD_ON_OPEN) < 0) {
		set_directory_from_file(curbp);
		set_global_g_val(GMDCD_ON_OPEN,FALSE);
	}
#endif

	/* We won't always be able to show messages before the screen is
	 * initialized.  Give it one last chance.
	 */
	if ((startstat != TRUE) && *mlsave)
		mlforce("%s", mlsave);

	/* process commands */
	loop();

	/* NOTREACHED */
	return BADEXIT;
}

/* this is nothing but the main command loop */
static void
loop(void)
{
	const CMDFUNC
		*cfp = NULL,
		*last_cfp = NULL,
		*last_failed_motion_cfp = NULL;
	int s,c,f,n;


	for_ever {

		/* vi doesn't let the cursor rest on the newline itself.  This
			takes care of that. */
		/* if we're inserting, or will be inserting again, then
			suppress.  this happens if we're using arrow keys
			during insert */
		if (is_at_end_of_line(DOT) && (DOT.o > w_left_margin(curwp)) &&
				!insertmode && !cmd_mouse_motion(cfp))
			backchar(TRUE,1);

		/* same goes for end-of-file -- I'm actually not sure if
			this can ever happen, but I _am_ sure that it's
			a lot safer not to let it... */
		if (is_header_line(DOT,curbp) && !is_empty_buf(curbp))
			(void)backline(TRUE,1);

		/* start recording for '.' command */
		dotcmdbegin();

		/* bring the screen up to date */
		s = update(FALSE);

		/* get a user command */
		kbd_mac_check();
		c = kbd_seq();

		/* reset the contents of the command/status line */
		if (kbd_length() > 0) {
			mlerase();
			if (s != SORTOFTRUE) /* did nothing due to typeahead */
				(void)update(FALSE);
		}

		f = FALSE;
		n = 1;

#if LATERMAYBE
/* insertion is too complicated to pop in
	and out of so glibly...   -pgf */
#ifdef insertmode
		/* FIXME: Paul and Tom should check this over. */
		if (insertmode != FALSE) {
			if (!kbd_replaying(FALSE))
			    mayneedundo();
			unkeystroke(c);
			insert(f,n);
			dotcmdfinish();
			continue;
		}
#endif /* insertmode */
#endif /* LATERMAYBE */

		do_repeats(&c,&f,&n);

		kregflag = 0;

		/* flag the first time through for some commands -- e.g. subst
			must know to not prompt for strings again, and pregion
			must only restart the p-lines buffer once for each
			command. */
		calledbefore = FALSE;

		/* convert key code to a function pointer */
		cfp = DefaultKeyBinding(c);

		if (cfp == &f_dotcmdplay &&
			(last_cfp == &f_undo ||
			 last_cfp == &f_forwredo ||
			 last_cfp == &f_backundo ||
			 last_cfp == &f_inf_undo))
			cfp = &f_inf_undo;

		s = execute(cfp, f, n);

		last_cfp = cfp;

		/* stop recording for '.' command */
		dotcmdfinish();

		/* If this was a motion that failed, sound the alarm (like vi),
		 * but limit it to once, in case the user is holding down the
		 * autorepeat-key.
		 */
		if ( (cfp != NULL)
		 && ((cfp->c_flags & MOTION) != 0)
		 && (s == FALSE) ) {
			if (cfp != last_failed_motion_cfp ||
					global_g_val(GMDMULTIBEEP)) {
				last_failed_motion_cfp = cfp;
				kbd_alarm();
			}
		} else {
			last_failed_motion_cfp = NULL; /* avoid noise! */
		}

		attrib_matches();
		regionshape = EXACT;

		/*
		 * Some perl scripts may not reset this flag.
		 */
		vile_is_busy = FALSE;

	}
}

/* attempt to locate the executable that contains our code.
* leave its directory name in exec_pathname and shorten prog_arg
* to the simple filename (no path).
*/
static void
get_executable_dir(void)
{
#if SYS_UNIX || SYS_VMS
	char	temp[NFILEN];
	char	*s, *t;

	if (last_slash(prog_arg) == NULL) {
		/* If there are no slashes, we can guess where we came from,
		 */
		if ((s = cfg_locate(prog_arg, FL_PATH|FL_EXECABLE)) != 0)
			s = strmalloc(s);
	} else {
		/* if there _are_ slashes, then argv[0] was either
		 * absolute or relative. lengthen_path figures it out.
		 */
		s = strmalloc(lengthen_path(strcpy(temp, prog_arg)));
	}
	if (s == 0)
		return;

	t = pathleaf(s);
	if (t != s) {
		/*
		 * On a unix host, 't' points past slash.  On a VMS host,
		 * 't' points to first char after the last ':' or ']' in
		 * the exe's path.
		 */
		prog_arg = strmalloc(t);
		*t = EOS;
		exec_pathname = strmalloc(lengthen_path(strcpy(temp, s)));
	}
	free(s);
#endif
}

void
tidy_exit(int code)
{
#if OPT_PERL
	perl_exit();
#endif
#if DISP_X11
	term.close(); /* need this if $xshell left subprocesses */
#endif
	ttclean (TRUE);
#if SYS_UNIX
	setup_handler(SIGHUP,SIG_IGN);
#endif
	ExitProgram(code);
}

#ifndef strmalloc
char *
strmalloc(const char *s)
{
	register char *ns = castalloc(char,strlen(s)+1);
	if (ns != 0)
		(void)strcpy(ns,s);
	return ns;
}
#endif

int
no_memory(const char *s)
{
	mlforce("[%s] %s", out_of_mem, s);
	return FALSE;
}

static void
global_val_init(void)
{
	static const char expand_chars[] =
		{ EXPC_THIS, EXPC_THAT, EXPC_SHELL, EXPC_TOKEN, EXPC_RPAT, 0 };
	register int i;
	char *s;

#if OPT_FILTER && defined(WIN32)
	flt_array();
#endif
	/* set up so the global value pointers point at the global
		values.  we never actually use the global pointers
		directly, but when buffers get a copy of the
		global_b_values structure, the pointers will still point
		back at the global values, which is what we want */
	for (i = 0; i <= NUM_G_VALUES; i++)
		make_local_val(global_g_values.gv, i);

	for (i = 0; i <= NUM_B_VALUES; i++)
		make_local_val(global_b_values.bv, i);

	for (i = 0; i <= NUM_W_VALUES; i++)
		make_local_val(global_w_values.wv, i);

#if OPT_MAJORMODE
	/*
	 * Built-in majormodes (see 'modetbl')
	 */
	alloc_mode("c", TRUE);
	alloc_mode("vile", TRUE);
#endif

	/*
	 * Universal-mode defaults
	 */
	set_global_g_val(GMDABUFF,	TRUE);	/* auto-buffer */
	set_global_g_val(GMDALTTABPOS,	FALSE); /* emacs-style tab
							positioning */
#ifdef GMDDIRC
	set_global_g_val(GMDDIRC,	FALSE); /* directory-completion */
#endif
	set_global_g_val(GMDERRORBELLS, TRUE);	/* alarms are noticeable */
#if OPT_FLASH
	set_global_g_val(GMDFLASH,	FALSE); /* beeps beep by default */
# if VTFLASH_HOST
	set_global_g_val(GVAL_VTFLASH,	VTFLASH_OFF); /* hardwired flash off */
# endif
#endif
#if OPT_SHELL
	set_global_g_val(GMDCD_ON_OPEN,	cd_on_open);
#endif
#ifdef GMDW32PIPES
	set_global_g_val(GMDW32PIPES,	is_winnt()); /* use native pipes? */
#endif
#if SYS_WINNT && defined(DISP_NTWIN)
	/* Allocate console before spawning piped process? */
	set_global_g_val(GMDFORCE_CONSOLE, is_win95());
#endif
#if SYS_WINNT && defined(VILE_OLE)
	set_global_g_val_ptr(GVAL_REDIRECT_KEYS,
			     strmalloc("F5::S,F10::S,F11::S,F7::F,F5:C:,F9::Y"));
#endif
#ifdef GMDHISTORY
	set_global_g_val(GMDHISTORY,	TRUE);
#endif
	set_global_g_val(GMDMULTIBEEP,	TRUE); /* multiple beeps for multiple
						motion failures */
#if OPT_WORKING
	set_global_g_val(GMDWORKING,	TRUE);	/* we put up "working..." */
#endif
	/* which 8 bit chars are printable? */
	set_global_g_val(GVAL_PRINT_LOW, 0);
	set_global_g_val(GVAL_PRINT_HIGH, 0);


	/* catnap times: */
	/* how long to wait for ESC seq */
	set_global_g_val(GVAL_TIMEOUTVAL, 500);
	/* how long to wait for user seq */
#if SYS_MSDOS	/* actually, 16-bit ints */
	set_global_g_val(GVAL_TIMEOUTUSERVAL, 30000);
#else
	set_global_g_val(GVAL_TIMEOUTUSERVAL, 60000);
#endif

#if SYS_WINNT
	set_global_g_val(GVAL_SCROLLPAUSE, 0);
#endif

	/* allow remapping by default */
	set_global_g_val(GMDREMAP, TRUE);

	set_global_g_val(GVAL_MAPLENGTH, 1200);

	/* set noresolve-links by default in case we've got NFS problems */
#ifdef GMDRESOLVE_LINKS
	set_global_g_val(GMDRESOLVE_LINKS, FALSE);
#endif

	set_global_g_val_ptr(GVAL_EXPAND_CHARS, strmalloc(expand_chars));
	set_global_g_val(GMDEXPAND_PATH,FALSE);
#ifdef GMDGLOB
	set_global_g_val(GMDGLOB, TRUE);
#endif
#ifdef GVAL_GLOB
	set_global_g_val_ptr(GVAL_GLOB, strmalloc("!echo %s"));
#endif

	set_global_g_val(GMDIMPLYBUFF,	FALSE); /* imply-buffer */
#if	OPT_POPUPCHOICE
# if	OPT_ENUM_MODES
	set_global_g_val(GVAL_POPUP_CHOICES, POPUP_CHOICES_DELAYED);
# else
	set_global_g_val(GMDPOPUP_CHOICES,TRUE);
# endif
#endif
#if	OPT_FILEBACK
# if	OPT_MSDOS_PATH
	set_global_g_val_ptr(GVAL_BACKUPSTYLE, strmalloc(".bak"));
# else
	set_global_g_val_ptr(GVAL_BACKUPSTYLE, strmalloc("off"));
# endif
#endif
#if	OPT_POPUP_MSGS
	set_global_g_val(GMDPOPUP_MSGS,-TRUE);	/* popup-msgs */
#endif
#ifdef GMDHEAPSIZE
	set_global_g_val(GMDHEAPSIZE,	TRUE);	/* show heap usage */
#endif
	set_global_g_val(GVAL_REPORT,	5);	/* report changes */
#if	OPT_XTERM
	set_global_g_val(GMDXTERM_MOUSE,FALSE);	/* mouse-clicking */
#endif
#ifdef GMDWARNBLANKS
	set_global_g_val(GMDWARNBLANKS,FALSE);	/* if filenames have blanks */
#endif
	set_global_g_val(GMDWARNUNREAD,TRUE);	/* warn if quitting without
						looking at all buffers */
	set_global_g_val(GMDWARNREREAD,TRUE);	/* warn before rereading
						a buffer */
	set_global_g_val(GMDWARNRENAME,TRUE);	/* warn before renaming
						a buffer */
	set_global_g_val(GMDSMOOTH_SCROLL, FALSE);
	set_global_g_val(GMDSPACESENT,  TRUE); /* add two spaces after each
						sentence */
#if OPT_COLOR
	set_global_g_val(GVAL_FCOLOR,	C_WHITE); /* foreground color */
	set_global_g_val(GVAL_BCOLOR,	C_BLACK); /* background color */
	set_global_g_val(GVAL_CCOLOR,	ENUM_UNKNOWN);	/* cursor color */
#endif

	/*
	 * Buffer-mode defaults
	 */
	set_global_b_val(MDAIND,	FALSE); /* auto-indent */
	set_global_b_val(MDCINDENT,	FALSE);	/* C-style indent */
	set_global_b_val(MDASAVE,	FALSE);	/* auto-save */
	set_global_b_val(MDBACKLIMIT,	TRUE);	/* limit backspacing to
							insert point */
#ifdef	MDCHK_MODTIME
	set_global_b_val(MDCHK_MODTIME,	FALSE); /* modtime-check */
#endif
#if	!OPT_MAJORMODE
	set_global_b_val(MDCMOD,	FALSE); /* C mode */
#endif
#ifdef MDCRYPT
	set_global_b_val(MDCRYPT,	FALSE);	/* crypt */
#endif
	set_global_b_val(MDIGNCASE,	FALSE); /* exact matches */
	set_global_b_val(MDDOS,	CRLF_LINES);	/* on by default on DOS, off others */
	set_global_b_val(VAL_RECORD_SEP, CRLF_LINES ? RS_CRLF : RS_LF);
	set_global_b_val(MDMAGIC,	TRUE);	/* magic searches */
	set_global_b_val(MDMETAINSBIND, TRUE);	/* honor meta-bindings when
							in insert mode */
	set_global_b_val(MDNEWLINE,	TRUE);	/* trailing-newline */
	set_global_b_val(MDREADONLY,	FALSE); /* readonly */
	set_global_b_val(MDSHOWMAT,	FALSE);	/* show-match */
	set_global_b_val(MDSHOWMODE,	TRUE);	/* show-mode */
	set_global_b_val(MDSWRAP,	TRUE);	/* scan wrap */
	set_global_b_val(MDTABINSERT,	TRUE);	/* allow tab insertion */
	set_global_b_val(MDTAGSRELTIV,	FALSE);	/* path relative tag lookups */
	set_global_b_val(MDTERSE,	FALSE);	/* terse messaging */
#if	OPT_HILITEMATCH
	set_global_g_val(GVAL_MCOLOR,   VAREV);	/* show in reverse */
	set_global_b_val(VAL_HILITEMATCH, 0);	/* no hilite */
#endif
	set_global_g_val(GVAL_MINI_HILITE, VAREV); /* reverse hilite */
#if OPT_UPBUFF
	set_global_b_val(MDUPBUFF,	TRUE);	/* animated */
#endif
	set_global_b_val(MDVIEW,	FALSE); /* view-only */
	set_global_b_val(MDWRAP,	FALSE); /* wrap */
#if OPT_LCKFILES
	/* locking defaults */
	set_global_g_val(GMDUSEFILELOCK,FALSE);	/* Use filelocks */
	set_global_b_val(MDLOCKED,	FALSE);	/* LOCKED */
	set_global_b_val_ptr(VAL_LOCKER, strmalloc("")); /* Name locker */
#endif
#if SYS_VMS
	set_global_g_val(GMDALL_VERSIONS, FALSE);
	set_global_b_val(VAL_RECORD_FORMAT, FAB$C_UDF);
	set_global_b_val(VAL_RECORD_LENGTH, 0);
#endif
	set_global_g_val(GMDRONLYVIEW,	FALSE);	/* Set view-on-readonly */
	set_global_g_val(GMDRONLYRONLY,	FALSE);	/* Set readonly-on-readonly */

	set_global_b_val(VAL_ASAVECNT,	256);	/* autosave count */
#if OPT_MAJORMODE
	set_submode_val("c", VAL_SWIDTH, 8);	/* C file shiftwidth */
	set_submode_val("c", VAL_TAB,	8);	/* C file tab stop */
	set_submode_val("c", MDCINDENT,	TRUE);	/* C-style indent */
	set_global_b_val(MDHILITE,	TRUE);	/* syntax-highlighting */
#else
	set_global_b_val(VAL_C_SWIDTH,	8);	/* C file shiftwidth */
	set_global_b_val(VAL_C_TAB,	8);	/* C file tab stop */
#endif
	set_global_b_val(VAL_SWIDTH,	8);	/* shiftwidth */
	set_global_b_val(VAL_TAB,	8);	/* tab stop */
	set_global_b_val(VAL_TAGLEN,	0);	/* significant tag length */
	set_global_b_val(MDUNDOABLE,	TRUE);	/* undo stack active */
	set_global_b_val(VAL_UNDOLIM,	10);	/* undo limit */

	set_global_b_val_ptr(VAL_TAGS, strmalloc("tags")); /* tags filename */
	set_global_b_val_ptr(VAL_FENCES, strmalloc("{}()[]")); /* fences */
#if OPT_MAJORMODE
	set_global_b_val(VAL_FENCE_LIMIT, 10);	/* fences iteration timeout */
#endif
#if OPT_COLOR&&!SMALLER
	set_global_b_val(VAL_AUTOCOLOR, 0);	/* auto syntax coloring timeout */
#endif

#if SYS_VMS
#define	DEFAULT_CSUFFIX	"\\.\\(\\([CHIS]\\)\\|CC\\|CXX\\|HXX\\)\\(;[0-9]*\\)\\?$"
#endif
#if SYS_MSDOS
#define	DEFAULT_CSUFFIX	"\\.\\(\\([chis]\\)\\|cc\\|cpp\\|cxx\\|hxx\\)$"
#endif
#ifndef DEFAULT_CSUFFIX	/* UNIX or OS2/HPFS (mixed-case names) */
#define	DEFAULT_CSUFFIX	"\\.\\(\\([Cchis]\\)\\|CC\\|cc\\|cpp\\|cxx\\|hxx\\|scm\\)$"
#endif

#if OPT_MAJORMODE
	set_majormode_rexp("c", MVAL_SUFFIXES, DEFAULT_CSUFFIX);
#else
	/* suffixes for C mode */
	set_global_g_val_rexp(GVAL_CSUFFIXES,
		new_regexval(
			DEFAULT_CSUFFIX,
			TRUE));
#endif

#define B_REGEXP(mode,value) \
		set_global_b_val_rexp(mode, new_regexval(value, TRUE));

	B_REGEXP( VAL_FENCE_BEGIN, "/\\*" );
	B_REGEXP( VAL_FENCE_END,   "\\*/" );

	B_REGEXP( VAL_FENCE_IF,    "^\\s*#\\s*if" );
	B_REGEXP( VAL_FENCE_ELIF,  "^\\s*#\\s*elif\\>" );
	B_REGEXP( VAL_FENCE_ELSE,  "^\\s*#\\s*else\\>" );
	B_REGEXP( VAL_FENCE_FI,    "^\\s*#\\s*endif\\>" );

		/* where do paragraphs start? */
	B_REGEXP( VAL_PARAGRAPHS, "^\\.[ILPQ]P\\>\\|^\\.P\\>\\|\
^\\.LI\\>\\|^\\.[plinb]p\\>\\|^\\.\\?\\s*$" );

		/* where do comments start and end, for formatting them */
	B_REGEXP( VAL_COMMENTS, "^\\s*/\\?\\(\\s*[#*>/]\\)\\+/\\?\\s*$" );

	B_REGEXP( VAL_CMT_PREFIX, "^\\s*\\(\\(\\s*[#*>]\\)\\|\\(///*\\)\\)\\+" );

		/* where do sections start? */
	B_REGEXP( VAL_SECTIONS, "^[{\014]\\|^\\.[NS]H\\>\\|^\\.HU\\?\\>\\|\
^\\.[us]h\\>\\|^+c\\>" );	/* }vi */

		/* where do sentences start? */
	B_REGEXP( VAL_SENTENCES, "[.!?][])\"']* \\?$\\|[.!?][])\"']*  \\|\
^\\.[ILPQ]P\\>\\|^\\.P\\>\\|^\\.LI\\>\\|^\\.[plinb]p\\>\\|^\\.\\?\\s*$" );

	/*
	 * Window-mode defaults
	 */
#ifdef WMDLINEWRAP
	set_global_w_val(WMDLINEWRAP,	FALSE); /* line-wrap */
#endif
	set_global_w_val(WMDLIST,	FALSE); /* list-mode */
	set_global_w_val(WMDNUMBER,	FALSE);	/* number */
	set_global_w_val(WMDHORSCROLL,	TRUE);	/* horizontal scrolling */
#ifdef WMDTERSELECT
	set_global_w_val(WMDTERSELECT,	TRUE);	/* terse selections */
#endif

	set_global_w_val(WVAL_SIDEWAYS,	0);	/* list-mode */

	if ((s = getenv("VILE_HELP_FILE")) == 0)
		s = "vile.hlp";
	helpfile = strmalloc(s);

	if ((s = getenv("VILE_STARTUP_FILE")) == 0) {
#if	SYS_MSDOS || SYS_OS2 || SYS_WINNT || SYS_VMS
		s = "vile.rc";
#else	/* SYS_UNIX */
		s = ".vilerc";
#endif
	}
	startup_file = strmalloc(s);

	if ((s = getenv("VILE_STARTUP_PATH")) != 0) {
		append_to_path_list(&startup_path, s);
	} else {
#if	SYS_MSDOS || SYS_OS2 || SYS_WINNT
		append_to_path_list(&startup_path, "/sys/public");
		append_to_path_list(&startup_path, "/usr/bin");
		append_to_path_list(&startup_path, "/bin");
		append_to_path_list(&startup_path, "/");
#else
#if	SYS_VMS
		append_to_path_list(&startup_path, "sys$login");
		append_to_path_list(&startup_path, "sys$sysdevice:[vmstools]");
		append_to_path_list(&startup_path, "sys$library");
#else	/* SYS_UNIX */
#if	defined(VILE_STARTUP_PATH)
		append_to_path_list(&startup_path, VILE_STARTUP_PATH);
#else
		append_to_path_list(&startup_path, "/usr/local/lib");
		append_to_path_list(&startup_path, "/usr/local");
		append_to_path_list(&startup_path, "/usr/lib");
#endif	/* VILE_STARTUP_PATH */
#endif	/* SYS_VMS... */
#endif	/* SYS_MSDOS...*/
	}

#ifdef	HELP_LOC
	append_to_path_list(&startup_path, HELP_LOC);
#endif

	if (!(s = getenv("VILE_LIBDIR_PATH")))
	{
#ifdef VILE_LIBDIR_PATH
	    s = VILE_LIBDIR_PATH;
#else
	    s = "";
#endif
	}
	libdir_path = strmalloc(s);

	tb_init(&replacepat, EOS);

#if	OPT_MLFORMAT
	modeline_format = strmalloc(
	    "%-%i%- %b %m:: :%f:is : :%=%F: : :%l:(:,:%c::) :%p::% :%S%-%-%|"
	);
#endif
#if	OPT_POSFORMAT
	position_format = strmalloc(
	    "Line %{$curline}d of %{$blines}d,\
 Col %{$curcol}d of %{$lcols}d,\
 Char %{$curchar}d of %{$bchars}d\
 (%P%%) char is 0x%{$char}x or 0%{$char}o"
	);
#endif
#if OPT_FINDERR
#if	OPT_MSDOS_PATH
	set_state_variable(s_filename_expr__, "\\([a-zA-Z]:\\)\\?[^ \t\":]");
#else
	set_state_variable(s_filename_expr__, "[^ \t\"]");
#endif
#endif
	/*
	 * Initialize the "normal" bindings for insert and command mode to
	 * the motion-commands that are safe if insert-exec mode is enabled.
	 */
	for (i = 0; i < N_chars; i++) {
		const CMDFUNC *cfp;

		sel_bindings.kb_normal[i] = dft_bindings.kb_normal[i];
		ins_bindings.kb_normal[i] = 0;
		cmd_bindings.kb_normal[i] = dft_bindings.kb_normal[i];
		if (i < 32
		 && (cfp = dft_bindings.kb_normal[i]) != 0
		 && (cfp->c_flags & (GOAL|MOTION)) != 0) {
			ins_bindings.kb_normal[i] =
			cmd_bindings.kb_normal[i] = cfp;
		}
	}
}

#if SYS_UNIX || SYS_MSDOS || SYS_OS2 || SYS_WINNT || SYS_VMS

/* ARGSUSED */
SIGT
catchintr (int ACTUAL_SIG_ARGS)
{
	am_interrupted = TRUE;
#if SYS_MSDOS || SYS_OS2 || SYS_WINNT
	sgarbf = TRUE;	/* there's probably a ^C on the screen. */
#endif
	setup_handler(SIGINT,catchintr);
	if (im_waiting(-1))
		longjmp(read_jmp_buf, signo);
	SIGRET;
}
#endif

#ifndef interrupted  /* i.e. unless it's a macro */
int
interrupted(void)
{
#if SYS_MSDOS && CC_DJGPP

	if (_go32_was_ctrl_break_hit() != 0) {
		while(keystroke_avail())
			(void)keystroke();
		return TRUE;
	}
	if (was_ctrl_c_hit() != 0) {
		while(keystroke_avail())
			(void)keystroke();
		return TRUE;
	}

	if (am_interrupted)
		return TRUE;
	return FALSE;
#endif
}
#endif

void
not_interrupted(void)
{
    am_interrupted = FALSE;
#if SYS_MSDOS
# if CC_DJGPP
    (void)_go32_was_ctrl_break_hit();  /* flush any pending kbd ctrl-breaks */
    (void)was_ctrl_c_hit();  /* flush any pending kbd ctrl-breaks */
# endif
#endif
}

#if SYS_MSDOS
# if CC_WATCOM
int
wat_crit_handler(unsigned deverror, unsigned errcode, unsigned *devhdr)
{
	_hardresume((int)_HARDERR_FAIL);
	return (int)_HARDERR_FAIL;
}
#else
void
dos_crit_handler(void)
{
#  if ! CC_DJGPP
	_hardresume(_HARDERR_FAIL);
#  endif
}
#  endif
#endif


static void
siginit(void)
{
#if SYS_UNIX
	setup_handler(SIGINT,catchintr);
	setup_handler(SIGHUP,imdying);
#ifdef SIGBUS
	setup_handler(SIGBUS,imdying);
#endif
#ifdef SIGSYS
	setup_handler(SIGSYS,imdying);
#endif
	setup_handler(SIGSEGV,imdying);
	setup_handler(SIGTERM,imdying);
/* #define DEBUG 1 */
#if DEBUG
	setup_handler(SIGQUIT,imdying);
#else
	setup_handler(SIGQUIT,SIG_IGN);
#endif
	setup_handler(SIGPIPE,SIG_IGN);
#if defined(SIGWINCH) && ! DISP_X11
	setup_handler(SIGWINCH,sizesignal);
#endif
#else
# if SYS_MSDOS
	setup_handler(SIGINT,catchintr);
#  if CC_DJGPP
	_go32_want_ctrl_break(TRUE);
	setcbrk(FALSE);
	want_ctrl_c(TRUE);
	hard_error_catch_setup();
#  else
#   if CC_WATCOM
	{
	/* clean up Warning from Watcom C */
	void *ptrfunc = wat_crit_handler;
	_harderr(ptrfunc);
	}
#   else	/* CC_TURBO */
	_harderr(dos_crit_handler);
#   endif
#  endif
# endif
# if SYS_OS2 || SYS_WINNT
	setup_handler(SIGINT,catchintr);
#endif
#endif

}

static void
siguninit(void)
{
#if SYS_MSDOS
# if CC_DJGPP
	_go32_want_ctrl_break(FALSE);
	want_ctrl_c(FALSE);
	hard_error_teardown();
	setcbrk(TRUE);
# endif
#endif
}

/* do number processing if needed */
static void
do_num_proc(int *cp, int *fp, int *np)
{
	register int c, f, n;
	register int	mflag;
	register int oldn;

	c = *cp;

	if (isCntrl(c) || isSpecial(c))
		return;

	f = *fp;
	n = *np;
	if (f)
		oldn = n;
	else
		oldn = 1;
	n = 1;

	if ( isDigit(c) && c != '0' ) {
		n = 0;		/* start with a zero default */
		f = TRUE;	/* there is a # arg */
		mflag = 1;		/* current minus flag */
		while ((isDigit(c) && !isSpecial(c)) || (c == '-')) {
			if (c == '-') {
				/* already hit a minus or digit? */
				if ((mflag == -1) || (n != 0))
					break;
				mflag = -1;
			} else {
				n = n * 10 + (c - '0');
			}
			if ((n == 0) && (mflag == -1))	/* lonely - */
				mlwrite("arg:");
			else
				mlwrite("arg: %d",n * mflag);

			c = kbd_seq();	/* get the next key */
		}
		n = n * mflag;	/* figure in the sign */
	}
	*cp = c;
	*fp = f;
	*np = n * oldn;
}

/* do emacs ^U-style repeat argument processing -- vile binds this to 'K' */
static void
do_rept_arg_proc(int *cp, int *fp, int *np)
{
	register int c, f, n;
	register int	mflag;
	register int	oldn;
	c = *cp;

	if (c != reptc)
		return;

	f = *fp;
	n = *np;

	if (f)
		oldn = n;
	else
		oldn = 1;

	n = 4;		/* start with a 4 */
	f = TRUE;	/* there is a # arg */
	mflag = 0;			/* that can be discarded. */
	mlwrite("arg: %d",n);
	while ( (isDigit( c=kbd_seq() ) && !isSpecial(c))
			|| c==reptc || c=='-'){
		if (c == reptc)
			n = n*4;

		/*
		 * If dash, and start of argument string, set arg.
		 * to -1.  Otherwise, insert it.
		 */
		else if (c == '-') {
			if (mflag)
				break;
			n = 0;
			mflag = -1;
		}
		/*
		 * If first digit entered, replace previous argument
		 * with digit and set sign.  Otherwise, append to arg.
		 */
		else {
			if (!mflag) {
				n = 0;
				mflag = 1;
			}
			n = 10*n + c - '0';
		}
		mlwrite("arg: %d", (mflag >=0) ? n : (n ? -n : -1));
	}
	/*
	 * Make arguments preceded by a minus sign negative and change
	 * the special argument "^U -" to an effective "^U -1".
	 */
	if (mflag == -1) {
		if (n == 0)
			n++;
		n = -n;
	}

	*cp = c;
	*fp = f;
	*np = n * oldn;
}

/* handle all repeat counts */
void
do_repeats(int *cp, int *fp, int *np)
{
	do_num_proc(cp,fp,np);
	do_rept_arg_proc(cp,fp,np);
	if (dotcmdactive == PLAY) {
		if (dotcmdarg)	/* then repeats are done by dotcmdcnt */
			*np = 1;
	} else {
		/* then we want to cancel any dotcmdcnt repeats */
		if (*fp) dotcmdarg = FALSE;
	}
}

/* the vi ZZ command -- write all, then quit */
int
zzquit(int f, int n)
{
	int thiscmd;
	int cnt;
	BUFFER *bp;

	thiscmd = lastcmd;
	cnt = any_changed_buf(&bp);
	if (cnt) {
		if (cnt > 1) {
		    mlprompt("Will write %d buffers.  %s ", cnt,
			    clexec ? s_NULL : "Repeat command to continue.");
		} else {
		    mlprompt("Will write buffer \"%s\".  %s ",
			    bp->b_bname,
			    clexec ? s_NULL : "Repeat command to continue.");
		}
		if (!clexec && !isnamedcmd) {
			if (thiscmd != kbd_seq())
				return FALSE;
		}

		if (writeall(f,n,FALSE,TRUE,FALSE) != TRUE) {
			return FALSE;
		}

	} else if (!clexec && !isnamedcmd) {
		/* consume the next char. anyway */
		if (thiscmd != kbd_seq())
			return FALSE;
	}
	return quit(f, n);
}

/*
 * attempt to write all changed buffers, and quit
 */
int
quickexit(int f, int n)
{
	register int status;
	if ((status = writeall(f,n,FALSE,TRUE,FALSE)) == TRUE)
		status = quithard(f, n);  /* conditionally quit	*/
	return status;
}

/* Force quit by giving argument */
/* ARGSUSED */
int
quithard(int f GCC_UNUSED, int n GCC_UNUSED)
{
	return quit(TRUE,1);
}

/*
 * Quit command. If an argument, always quit. Otherwise confirm if a buffer
 * has been changed and not written out.
 */
/* ARGSUSED */
int
quit(int f, int n GCC_UNUSED)
{
	int cnt;
	BUFFER *bp;
	const char *sadj, *sverb;

	run_a_hook(&exithook);

	if (f == FALSE) {
		cnt = any_changed_buf(&bp);
		sadj = "modified";
		sverb = "Write";
		if (cnt == 0 && global_g_val(GMDWARNUNREAD)) {
			cnt = any_unread_buf(&bp);
			sadj = "unread";
			sverb = "Look at";
		}
		if (cnt != 0) {
			if (cnt == 1)
				mlforce(
				"Buffer \"%s\" is %s.  %s it, or use :q!",
					bp->b_bname,sadj,sverb);
			else
				mlforce(
			  "There are %d %s buffers.  %s them, or use :q!",
					cnt,sadj,sverb);
			return FALSE;
		}
	}
#if OPT_LCKFILES
	/* Release all placed locks */
	if ( global_g_val(GMDUSEFILELOCK) ) {
		for_each_buffer(bp) {
			if ( bp->b_active ) {
				if (!b_val(curbp,MDLOCKED) &&
						!b_val(curbp,MDVIEW))
					release_lock(bp->b_fname);
			}
		}
	}
#endif
	siguninit();
#if OPT_WORKING
	setup_handler(SIGALRM, SIG_IGN);
#endif
#if NO_LEAKS
	{
		beginDisplay();		/* ...this may take a while... */

		/* free all of the global data structures */
		onel_leaks();
		path_leaks();
		kbs_leaks();
		bind_leaks();
		map_leaks();
		tags_leaks();
		wp_leaks();
		bp_leaks();
		vt_leaks();
		ev_leaks();
		mode_leaks();
		fileio_leaks();
#if DISP_X11
		x11_leaks();
#endif

		free_local_vals(g_valnames, global_g_values.gv, global_g_values.gv);
		free_local_vals(b_valnames, global_b_values.bv, global_b_values.bv);
		free_local_vals(w_valnames, global_w_values.wv, global_w_values.wv);

		FreeAndNull(libdir_path);
		FreeAndNull(startup_path);
		FreeAndNull(gregexp);
		tb_free(&tb_matched_pat);
#if	OPT_MLFORMAT
		FreeAndNull(modeline_format);
#endif
#if	OPT_POSFORMAT
		FreeAndNull(position_format);
#endif
		FreeAndNull(helpfile);
		FreeAndNull(startup_file);

#if SYS_UNIX
		if (strcmp(exec_pathname, "."))
			FreeAndNull(exec_pathname);
#endif
#if OPT_FILTER
		flt_leaks();
#endif
		/* do these last, e.g., for tb_matched_pat */
		itb_leaks();
		tb_leaks();

		term.close();
		/* whatever is left over must be a leak */
		show_alloc();
	}
#endif
	tidy_exit(GOODEXIT);
	/* NOTREACHED */
	return FALSE;
}

/* ARGSUSED */
int
writequit(int f GCC_UNUSED, int n)
{
	int s;
	s = filesave(FALSE,n);
	if (s != TRUE)
		return s;
	return quit(FALSE,n);
}

/*
 * Abort.
 * Beep the beeper. Kill off any keyboard macro, etc., that is in progress.
 * Sometimes called as a routine, to do general aborting of stuff.
 */
/* ARGSUSED */
int
esc_func(int f GCC_UNUSED, int n GCC_UNUSED)
{
	dotcmdactive = 0;
	regionshape = EXACT;
	doingopcmd = FALSE;
	do_sweep(FALSE);
	sweephack = FALSE;
	opcmd = 0;
	mlwarn("[Aborted]");
	return ABORT;
}

/* tell the user that this command is illegal while we are in
   VIEW (read-only) mode				*/

int
rdonly(void)
{
	mlwarn("[No changes are allowed while in \"view\" mode]");
	return FALSE;
}

/* ARGSUSED */
int
unimpl(int f GCC_UNUSED, int n GCC_UNUSED)
{
	mlwarn("[Sorry, that vi command is unimplemented in vile ]");
	return FALSE;
}

int
opercopy(int f, int n)
{
	return unimpl(f,n);
}

int
opermove(int f, int n)
{
	return unimpl(f,n);
}

int
opertransf(int f, int n)
{
	return unimpl(f,n);
}

int
operglobals(int f, int n)
{
	return unimpl(f,n);
}

int
opervglobals(int f, int n)
{
	return unimpl(f,n);
}

int
vl_source(int f, int n)
{
	return unimpl(f,n);
}

int
visual(int f, int n)
{
	return unimpl(f,n);
}

int
ex(int f, int n)
{
	return unimpl(f,n);
}

/* ARGSUSED */
/* user function that only returns true */
int
nullproc(int f GCC_UNUSED, int n GCC_UNUSED)
{
	return TRUE;
}

/* dummy functions for binding to key sequence prefixes */
/* ARGSUSED */
int cntl_a_func(int f GCC_UNUSED, int n GCC_UNUSED) { return TRUE; }

/* ARGSUSED */
int cntl_x_func(int f GCC_UNUSED, int n GCC_UNUSED) { return TRUE; }

/* ARGSUSED */
int poundc_func(int f GCC_UNUSED, int n GCC_UNUSED) { return TRUE; }

/* ARGSUSED */
int reptc_func(int f GCC_UNUSED, int n GCC_UNUSED) { return TRUE; }

/*----------------------------------------------------------------------------*/

/* initialize our version of the "chartypes" stuff normally in ctypes.h */
/* also called later, if charset-affecting modes change, for instance */
void
charinit(void)
{
	register int c;

	TRACE(("charinit lo=%d, hi=%d\n",
		global_g_val(GVAL_PRINT_LOW),
		global_g_val(GVAL_PRINT_HIGH)));

	/* If we're using the locale functions, set our flags based on its
	 * tables.  Note that just because you have 'setlocale()' doesn't mean
	 * that the tables are present or correct.  But this is a start.
	 */
#if OPT_LOCALE
	for (c = 0; c < N_chars; c++) {
		vl_chartypes_[c] = 0;
		if (iscntrl(c))  vl_chartypes_[c] |= vl_cntrl;
		if (isdigit(c))  vl_chartypes_[c] |= vl_digit;
		if (islower(c))  vl_chartypes_[c] |= vl_lower;
		if (isprint(c))  vl_chartypes_[c] |= vl_print;
		if (ispunct(c))  vl_chartypes_[c] |= vl_punct;
		if (isspace(c))  vl_chartypes_[c] |= vl_space;
		if (isupper(c))  vl_chartypes_[c] |= vl_upper;
	}
#else /* ! OPT_LOCALE */
	(void)memset((char *)vl_chartypes_, 0, sizeof(vl_chartypes_));

	/* control characters */
	for (c = 0; c < ' '; c++)
		vl_chartypes_[c] |= vl_cntrl;
	vl_chartypes_[127] |= vl_cntrl;

	/* lowercase */
	for (c = 'a'; c <= 'z'; c++)
		vl_chartypes_[c] |= vl_lower;
#if OPT_ISO_8859
	for (c = 0xc0; c <= 0xd6; c++)
		vl_chartypes_[c] |= vl_lower;
	for (c = 0xd8; c <= 0xde; c++)
		vl_chartypes_[c] |= vl_lower;
#endif
	/* uppercase */
	for (c = 'A'; c <= 'Z'; c++)
		vl_chartypes_[c] |= vl_upper;
#if OPT_ISO_8859
	for (c = 0xdf; c <= 0xf6; c++)
		vl_chartypes_[c] |= vl_upper;
	for (c = 0xf8; c <= 0xff; c++)
		vl_chartypes_[c] |= vl_upper;
#endif

	/* digits */
	for (c = '0'; c <= '9'; c++)
		vl_chartypes_[c] |= vl_digit;

	/* punctuation */
	for (c = '!'; c <= '/'; c++)
		vl_chartypes_[c] |= vl_punct;
	for (c = ':'; c <= '@'; c++)
		vl_chartypes_[c] |= vl_punct;
	for (c = '['; c <= '`'; c++)
		vl_chartypes_[c] |= vl_punct;
	for (c = LBRACE; c <= '~'; c++)
		vl_chartypes_[c] |= vl_punct;
#if OPT_ISO_8859
	for (c = 0xa1; c <= 0xbf; c++)
		vl_chartypes_[c] |= vl_punct;
#endif

	/* printable */
	for (c = ' '; c <= '~'; c++)
		vl_chartypes_[c] |= vl_print;

	/* whitespace */
	vl_chartypes_[' ']  |= vl_space;
#if OPT_ISO_8859
	vl_chartypes_[0xa0] |= vl_space;
#endif
	vl_chartypes_['\t'] |= vl_space;
	vl_chartypes_['\r'] |= vl_space;
	vl_chartypes_['\n'] |= vl_space;
	vl_chartypes_['\f'] |= vl_space;

#endif /* OPT_LOCALE */

	/* legal in pathnames */
	vl_chartypes_['.'] |= vl_pathn;
	vl_chartypes_['_'] |= vl_pathn;
	vl_chartypes_['~'] |= vl_pathn;
	vl_chartypes_['-'] |= vl_pathn;
	vl_chartypes_['*'] |= vl_pathn;
	vl_chartypes_['/'] |= vl_pathn;

	/* legal in "identifiers" */
	vl_chartypes_['_'] |= vl_ident|vl_qident;
	vl_chartypes_[':'] |= vl_qident;
#if SYS_VMS
	vl_chartypes_['$'] |= vl_ident|vl_qident;
#endif

	c = global_g_val(GVAL_PRINT_LOW);
	if (c < HIGHBIT) c = HIGHBIT;
	while ( c <= global_g_val(GVAL_PRINT_HIGH) && c < N_chars)
		vl_chartypes_[c++] |= vl_print;

#if DISP_X11
	for (c = 0; c < N_chars; c++) {
		if (isPrint(c) && !gui_isprint(c)) {
			vl_chartypes_[c] &= ~vl_print;
		}
	}
#endif
	/* backspacers: ^H, rubout */
	vl_chartypes_['\b'] |= vl_bspace;
	vl_chartypes_[127] |= vl_bspace;

	/* wildcard chars for most shells */
	vl_chartypes_['*'] |= vl_wild;
	vl_chartypes_['?'] |= vl_wild;
#if !OPT_VMS_PATH
#if SYS_UNIX
	vl_chartypes_['~'] |= vl_wild;
#endif
	vl_chartypes_[LBRACK] |= vl_wild;
	vl_chartypes_[RBRACK] |= vl_wild;
	vl_chartypes_[LBRACE] |= vl_wild;
	vl_chartypes_[RBRACE] |= vl_wild;
	vl_chartypes_['$'] |= vl_wild;
	vl_chartypes_['`'] |= vl_wild;
#endif

	/* ex mode line specifiers */
	vl_chartypes_[','] |= vl_linespec;
	vl_chartypes_['%'] |= vl_linespec;
	vl_chartypes_['-'] |= vl_linespec;
	vl_chartypes_['+'] |= vl_linespec;
	vl_chartypes_[';'] |= vl_linespec;
	vl_chartypes_['.'] |= vl_linespec;
	vl_chartypes_['$'] |= vl_linespec;
	vl_chartypes_['\''] |= vl_linespec;

	/* fences */
	vl_chartypes_[LBRACE] |= vl_fence;
	vl_chartypes_[RBRACE] |= vl_fence;
	vl_chartypes_[LPAREN] |= vl_fence;
	vl_chartypes_[RPAREN] |= vl_fence;
	vl_chartypes_[LBRACK] |= vl_fence;
	vl_chartypes_[RBRACK] |= vl_fence;

#if OPT_VMS_PATH
	vl_chartypes_[LBRACK] |= vl_pathn;	/* actually, "<", ">" too */
	vl_chartypes_[RBRACK] |= vl_pathn;
	vl_chartypes_['$'] |= vl_pathn;
	vl_chartypes_[':'] |= vl_pathn;
	vl_chartypes_[';'] |= vl_pathn;
#endif

#if OPT_MSDOS_PATH
	vl_chartypes_[BACKSLASH] |= vl_pathn;
	vl_chartypes_[':'] |= vl_pathn;
#endif

#if OPT_WIDE_CTYPES
	/* scratch-buffer-names (usually superset of vl_pathn) */
	vl_chartypes_[(unsigned)SCRTCH_LEFT[0]]  |= vl_scrtch;
	vl_chartypes_[(unsigned)SCRTCH_RIGHT[0]] |= vl_scrtch;
	vl_chartypes_[' '] |= vl_scrtch;	/* ...to handle "[Buffer List]" */
#endif

	for (c = 0; c < N_chars; c++) {
		if (!(isSpace(c)))
			vl_chartypes_[c] |= vl_nonspace;
		if (isDigit(c))
			vl_chartypes_[c] |= vl_linespec;
		if (isAlpha(c) || isDigit(c))
			vl_chartypes_[c] |= vl_ident|vl_pathn|vl_qident;
#if OPT_WIDE_CTYPES
		if (isSpace(c) || isPrint(c))
			vl_chartypes_[c] |= vl_shpipe;
		if (ispath(c))
			vl_chartypes_[c] |= vl_scrtch;
#endif
	}

}


#if	OPT_HEAPSIZE

/* track overall heap usage */

#undef	realloc
#undef	malloc
#undef	free

long currentheap;    /* current heap usage */

typedef	struct {
	size_t	length;
	unsigned magic;
} HEAPSIZE;

#define MAGIC_HEAP 0x12345678

/* display the amount of HEAP currently malloc'ed */
static void
display_heap_usage (void)
{
	beginDisplay();
	if (global_g_val(GMDHEAPSIZE)) {
		char membuf[20];
		int	saverow = ttrow;
		int	savecol = ttcol;

		if (saverow >= 0 && saverow < term.rows
		 && savecol >= 0 && savecol < term.cols) {
			(void)lsprintf(membuf, "[%ld]", currentheap);
			kbd_overlay(membuf);
			kbd_flush();
			movecursor(saverow, savecol);
		}
	}
	endofDisplay();
}

static char *old_ramsize(char *mp)
{
	HEAPSIZE *p = (HEAPSIZE *)(mp - sizeof(HEAPSIZE));

	if (p->magic == MAGIC_HEAP) {
		mp = (char *)p;
		currentheap -= p->length;
	}
	return mp;
}

static char *new_ramsize(char *mp, unsigned nbytes)
{
	HEAPSIZE *p = (HEAPSIZE *)mp;
	if (p != 0) {
		p->length = nbytes;
		p->magic  = MAGIC_HEAP;
		currentheap += nbytes;
		mp = (char *)((long)p + sizeof(HEAPSIZE));
	}
	return mp;
}

/* track reallocs */
char *track_realloc(char *p, unsigned size)
{
	if (!p)
		return track_malloc(size);

	size += sizeof(HEAPSIZE);
	p = new_ramsize(realloc(old_ramsize(p), size), size);
	display_heap_usage();
	return p;
}

/* track mallocs */
char *track_malloc(
unsigned size)
{
	char *p;

	size += sizeof(HEAPSIZE);
	if ((p = malloc(size)) != 0) {
		(void)memset(p, 0, size);	/* so we can use for calloc */
		p = new_ramsize(p, size);
		display_heap_usage();
	}

	return p;
}

/* track free'd memory */
void
track_free(char *p)
{
	if (!p)
		return;
	free(old_ramsize(p));
	display_heap_usage();
}
#endif	/* OPT_HEAPSIZE */

#if MALLOCDEBUG
mallocdbg(int f, int n)
{
	int lvl;
	lvl = malloc_debug(n);
	mlwrite("malloc debug level was %d",lvl);
	if (!f) {
		malloc_debug(lvl);
	} else if (n > 2) {
		malloc_verify();
	}
	return TRUE;
}
#endif


/*
 *	the log file is left open, unbuffered.  thus any code can do
 *
 *	extern FILE *FF;
 *	fprintf(FF, "...", ...);
 *
 *	to log events without disturbing the screen
 */

#ifdef DEBUGLOG
/* suppress the declaration so that the link will fail if someone uses it */
FILE *FF;
#endif

/*ARGSUSED*/
static void
start_debug_log(int ac GCC_UNUSED, char **av GCC_UNUSED)
{
#ifdef DEBUGLOG
	int i;
	FF = fopen("vilelog", "w");
	setbuf(FF,NULL);
	for (i = 0; i < ac; i++)
		(void)fprintf(FF,"arg %d: %s\n",i,av[i]);
#endif
}

#if SYS_MSDOS

#if CC_TURBO
int
showmemory(int f, int n)
{
	extern	long	coreleft(void);
	mlforce("Memory left: %ld bytes", coreleft());
	return TRUE;
}
#endif

#if CC_WATCOM
int
showmemory(int f, int n)
{
	mlforce("Watcom C doesn't provide a very useful 'memory-left' call.");
	return TRUE;
}
#endif

#if CC_DJGPP
int
showmemory(int f, int n)
{
	mlforce("Memory left: %ld Kb virtual, %ld Kb physical",
			_go32_dpmi_remaining_virtual_memory()/1024,
			_go32_dpmi_remaining_physical_memory()/1024);
	return TRUE;
}
#endif
#endif /* SYS_MSDOS */

char *
strncpy0(char *t, const char *f, SIZE_T l)
{
    (void)strncpy(t, f, l);
    if (l)
	t[l-1] = EOS;
    return t;
}

/*
 * This is probably more efficient for copying short strings into a large
 * fixed-size buffer, because strncpy always zero-pads the destination to
 * the given length.
 */
char *
vl_strncpy(char *dest, const char *src, size_t destlen)
{
    size_t srclen = strlen(src) + 1;
    if (srclen > destlen)
	srclen = destlen;
    return strncpy0(dest, src, srclen);
}

#if defined(SA_RESTART)
/* several systems (SCO, SunOS) have sigaction without SA_RESTART */
/*
 * Redefine signal in terms of sigaction for systems which have the
 * SA_RESTART flag defined through <signal.h>
 *
 * This definition of signal will cause system calls to get restarted for a
 * more BSD-ish behavior.  This will allow us to use the OPT_WORKING feature
 * for such systems.
 */

void
setup_handler(int sig, void (*disp) (int ACTUAL_SIG_ARGS))
{
    struct sigaction act, oact;

    act.sa_handler = disp;
    sigemptyset(&act.sa_mask);
#ifdef SA_NODEFER	/* don't rely on it.  if it's not there, signals
				probably aren't deferred anyway. */
    act.sa_flags = SA_RESTART|SA_NODEFER ;
#else
    act.sa_flags = SA_RESTART;
#endif

    (void)sigaction(sig, &act, &oact);

}
#else
void
setup_handler(int sig, void (*disp) (int ACTUAL_SIG_ARGS))
{
    (void)signal(sig, disp);
}
#endif


/* put us in a new process group, on command.  we don't do this all the
* time since it interferes with suspending xvile on some systems with some
* shells.  but we _want_ it other times, to better isolate us from signals,
* and isolate those around us (like buggy window/display managers) from
* _our_ signals.  so we punt, and leave it up to the user.
*/
/* ARGSUSED */
int
newprocessgroup(int f GCC_UNUSED, int n GCC_UNUSED)
{
#if DISP_X11

    int pid;

    if (f) {
#if SYS_VMS
	    pid = vfork();	/* VAX C and DEC C have a 'vfork()' */
#else
	    pid = fork();
#endif

	    if (pid > 0)
		ExitProgram(GOODEXIT);
	    else if (pid < 0) {
		fputs("cannot fork\n", stderr);
		tidy_exit(BADEXIT);
	    }
    }
# if !SYS_VMS
#  ifdef HAVE_SETSID
     (void)setsid();
#  else
#   ifdef HAVE_BSD_SETPGRP
     (void) setpgrp(0, 0);
#   else
     (void)setpgrp();
#   endif /* HAVE_BSD_SETPGRP */
#  endif /* HAVE_SETSID */
# endif /* SYS_VMS */
#endif /* DISP_X11 */
    return TRUE;
}


static int
cmd_mouse_motion(const CMDFUNC *cfp)
{
	int result = FALSE;
#if (OPT_XTERM || DISP_X11)
	if (cfp != 0
	 && CMD_U_FUNC(cfp) == mouse_motion)
		result = TRUE;
#endif
	return result;
}

static void
make_startup_file(char *name)
{
	FILE *fp;
	char temp[NFILEN];

	if (strcmp(pathcat(temp, home_dir(), startup_file), startup_file)
	 && ((fp = fopen(temp, "w")) != 0)) {
		fprintf(fp, "; generated by %s -I\n", prog_arg);
		fprintf(fp, "source %s\n", name);
		fclose(fp);
	}
}
