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Initial import of vim 4.2.

This is meant to replace nvi in the tree.  Vim, in general, works better,
provides more features, and does not suffer from the license problems
being imposed upon nvi.

On the other hand, vim lacks a non-visual ex mode, in addition to open mode.

This includes the GUI (X11) code, but doesn't try to compile it.

/*	$OpenBSD: version.c,v 1.1.1.1 1996/09/07 21:40:24 downsj Exp $	*/
/* vi:set ts=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.
 */

#include "vim.h"
#include "globals.h"
#include "proto.h"

/*
 * Vim originated from Stevie version 3.6 (Fish disk 217) by GRWalter (Fred)
 * It has been changed beyond recognition since then.
 *
 * All the remarks about older versions have been removed, they are not very
 * interesting.  Differences between version 3.0 and 4.0 can be found in
 * "../doc/vim_40.txt".
 *
 * Changes between version 4.1 and 4.2:
 * - Included ctags version 1.3.
 * - Included xxd.c version 1.4 (only one change since 1.3m)
 * - Unix: Adjusted check for child finished again.  Now use != ECHILD
 *   instead of == EINTR.
 * - Fixed: loading compressed files (with autocommands) didn't work when
 *   'textmode' was previously set.
 * - Fixed: When executing a shell, a window resize was not recognized for
 *   Unix.
 * - Fixed: For GUI, when executing an external command, a window resize
 *   caused the buffer to be redrawn.
 * - Fixed: Error message for not being able to open the .viminfo file could
 *   report the wrong filename.
 * - MS-DOS, Win32, OS/2: When $HOME is not set, use "C:/".
 * - OS/2: Improved handling of wildcards again.  Didn't ignore case, didn't
 *   work with backslashes.
 * - Fixed: ":s/pat<Tab>" could cause a core dump or other problems.
 * - Fixed: When entering a hidden buffer with ":e", the BufEnter autocommands
 *   were not executed.
 * - Fixed: Ignoring a CTRL-Z at end-of-file was only done on MS-DOS.  Now it
 *   also works on other systems, but only in textmode.
 * - Fixed: In the GUI special characters were not passed on to external
 *   commands, typeahead was truncated.
 * - Added "gq" as an alias to "Q".  Should be used when "Q" is made to be Vi
 *   compatible: go to Ex mode.
 * - Fixed: "gu" in Visual mode could not be redone with "." correctly.
 * - Fixed: ":normal" command made any typeahead executed right away, causing
 *   unpredictable problems.
 * - Fixed: ":normal atest^[" didn't update the screen.
 * - Fixed: Redoing blockwise visual delete at the end of the file could cause
 *   "invalid line number" errors.
 * - Fixed: vim_rename() didn't open the output file in binary mode, could
 *   cause the .viminfo file to contain CR-LF on OS/2.
 * - Fixed: OS/2 was using /tmp/xxx for temporary file name, would fail if
 *   there is no /tmp directory.  Now use $TMP/xxx, defaulting to c:/ if $TMP
 *   is not set.
 * - Fixed: When USE_TMPNAM was defined, was using the wrong array size for
 *   the viminfo temporary file.
 *
 * Changes between version 4.0 and 4.1:
 *
 * - Included xxd.c version 1.3m.
 * - Included ctags version 1.2.
 * - Included tools/efm_filt.er.
 * - Included changes for port to Atari MiNT, including makefile.mint.
 * - Included a few changes for OS/2: Improved executing external commands,
 *   depending on the shell; Handle resize after executing an external
 *   command; Handle wildcard expansion for more than one argument (e.g.
 *   ":n *.c *.h").
 * - Include a lot of small changes to the docs.
 * - Fixed: GUI version would busy-loop and mappings didn't work.  Was caused
 *   by gui_mch_wait_for_chars() not working properly.  This fix was the main
 *   reason for releasing 4.1.
 * - Fixed: setting 'term' while GUI is active was possible, and caused
 *   problems.
 * - Fixed: When the "to" part of a mapping or menu command was long (more
 *   than 24 chars on 32 bit MS-DOS, 128 chars on other systems), any <> were
 *   not translated and CTRL-Vs not removed.
 * - Fixed: 'modified' option was included for ":mkvimrc", it shouldn't.
 * - Included a few changes for that Atari MiNT port (vt52 builtin term
 *   entry).
 * - Fixed: on MS-DOS a file name pattern for an autocommand that contains
 *   "\*" or "\?" didn't work.
 * - On MS-DOS and Amiga, ignore case when matching the file name pattern for
 *   autocommands.
 * - Fixed: using :set to show the value of two options gave an error message
 *   (e.g. ":set so sj").
 * - Fixed: Non-printable characters in a file name caused trouble when
 *   displayed in a status line.
 * - Pack the MS-DOS zip files with Infozip, under Unix.  Preserves the long
 *   filenames and case.  Files with two dots don't work though, the first dot
 *   is replaced with an underscore.
 * - Fixed: Pasting more than one line with the mouse in insert mode, didn't
 *   put the cursor after the last pasted character.
 * - When pasting linewise text, put the '] mark on the last character of the
 *   last line, instead of the first character of the last line.
 * - Fixed: on some Unix systems, when resizing the window while in a external
 *   command (e.g., ":!cat"), Vim would stop waiting for the child, causing
 *   trouble, because the child is still running.
 * - Fixed: resizing the window while executing an external command, and
 *   't_ti' and 't_te' are defined to swap display buffers, Vim would redraw
 *   in the wrong display buffer after the "hit RETURN" message.
 * - Fixed: "va", "vA", "Vp", "VP", "Vs" and "VS" didn't set the cursor
 *   position used for up/down movements (e.g., when using "j" after them).
 * - Fixed: in GUI version, after using "cw" visual selection by dragging the
 *   mouse didn't work.
 * - Fixed: setting 'ttyscroll' to 0 caused scrolling of message to stop
 *   working.
 * - Fixed: the "WARNING: file changed" message caused buffers to be flushed
 *   and subsequent commands not to be executed.
 * - Fixed: in Insert mode, the message from "^O^G" would be
 *   overwritten by the mode message if 'showmode' set.
 * - Fixed: Using ":bdel" when there is only one buffer with two windows,
 *   could cause a crash.
 * - Changed: the '<' flag in 'cpoptions' now only switches off the
 *   recognizing of the <> form of key codes.  The 'k' flag is now used for
 *   the recognizing of raw key codes.
 * - Fixed: Typing ':' at the --more-- prompt, when displaying autocommands,
 *   caused extra linefeeds to be produced.
 * - Fixed: Using 'tagrelative' and ":set tags=./../tags", filenames would
 *   contain "../" as many times as CTRL-] would be used.  These are removed
 *   now.
 * - Fixed: Extremely long error message could cause a crash (e.g., when
 *   using ":help ^A<CR>").
 * - Added check for negative value of 'textwidth'.
 * - Fixed: On MS-DOS, getting the value of $HOME would cause the current
 *   directory for the drive to be changed.
 */

/*
 * Version[] is copied into the swap file (max. length is 10 chars).
 * longVersion[] is used for the ":version" command and "Vim -h".
 * Don't forget to update the numbers in version.h for Win32!!!
 */

char		   *Version = "VIM 4.2";
#ifdef HAVE_DATE_TIME
char		   *longVersion = "VIM - Vi IMproved 4.2 (1996 June 17, compiled " __DATE__ " " __TIME__ ")";
#else
char		   *longVersion = "VIM - Vi IMproved 4.2 (1996 June 17)";
#endif

static void version_msg __ARGS((char *s));

	void
do_version(arg)
	char_u	*arg;
{
	long		n;

	if (*arg != NUL)
	{
		found_version = getdigits(&arg) * 100;
		if (*arg == '.' && isdigit(arg[1]))
		{
			/* "4.1"  -> 401, "4.10" -> 410 */
			n = arg[1] - '0';
			if (isdigit(arg[2]))
				found_version += (arg[2] - '0') + n * 10;
			else
				found_version += n;
		}
		if (found_version > 400)
		{
			MSG("Warning: Found newer version command");
			if (sourcing_name != NULL)
			{
				MSG_OUTSTR(" in: \"");
				msg_outstr(sourcing_name);
				MSG_OUTSTR("\" line: ");
				msg_outnum((long)sourcing_lnum);
			}
		}
	}
	else
	{
		msg_outchar('\n');
		MSG(longVersion);
#ifdef WIN32
		MSG_OUTSTR("\nWindows NT / Windows 95 version");
#endif
#ifdef MSDOS
# ifdef DJGPP
		MSG_OUTSTR("\n32 bit MS-DOS version");
# else
		MSG_OUTSTR("\n16 bit MS-DOS version");
# endif
#endif
		MSG_OUTSTR("\nCompiled with (+) or without (-):\n");
#ifdef AMIGA			/* only for Amiga systems */
# ifdef NO_ARP
		version_msg("-ARP ");
# else
		version_msg("+ARP ");
# endif
#endif
#ifdef AUTOCMD
		version_msg("+autocmd ");
#else
		version_msg("-autocmd ");
#endif
#ifdef NO_BUILTIN_TCAPS
		version_msg("-builtin_terms ");
#endif
#ifdef SOME_BUILTIN_TCAPS
		version_msg("+builtin_terms ");
#endif
#ifdef ALL_BUILTIN_TCAPS
		version_msg("++builtin_terms ");
#endif
#ifdef CINDENT
		version_msg("+cindent ");
#else
		version_msg("-cindent ");
#endif
#ifdef COMPATIBLE
		version_msg("+compatible ");
#else
		version_msg("-compatible ");
#endif
#ifdef DEBUG
		version_msg("+debug ");
#endif
#ifdef DIGRAPHS
		version_msg("+digraphs ");
#else
		version_msg("-digraphs ");
#endif
#ifdef EMACS_TAGS
		version_msg("+emacs_tags ");
#else
		version_msg("-emacs_tags ");
#endif
			/* only interesting on Unix systems */
#if !defined(USE_SYSTEM) && defined(UNIX)
		version_msg("+fork() ");
#endif
#ifdef UNIX
# ifdef USE_GUI_MOTIF
		version_msg("+GUI_Motif ");
# else
#  ifdef USE_GUI_ATHENA
		version_msg("+GUI_Athena ");
#  else
		version_msg("-GUI ");
#  endif
# endif
#endif
#ifdef INSERT_EXPAND
		version_msg("+insert_expand ");
#else
		version_msg("-insert_expand ");
#endif
#ifdef HAVE_LANGMAP
		version_msg("+langmap ");
#else
		version_msg("-langmap ");
#endif
#ifdef LISPINDENT
		version_msg("+lispindent ");
#else
		version_msg("-lispindent ");
#endif
#ifdef RIGHTLEFT
		version_msg("+rightleft ");
#else
		version_msg("-rightleft ");
#endif
#ifdef SMARTINDENT
		version_msg("+smartindent ");
#else
		version_msg("-smartindent ");
#endif
			/* only interesting on Unix systems */
#if defined(USE_SYSTEM) && (defined(UNIX) || defined(__EMX__))
		version_msg("+system() ");
#endif
#if defined(UNIX) || defined(__EMX__)
/* only unix (or OS/2 with EMX!) can have terminfo instead of termcap */
# ifdef TERMINFO
		version_msg("+terminfo ");
# else
		version_msg("-terminfo ");
# endif
#else				/* unix always includes termcap support */
# ifdef HAVE_TGETENT
		version_msg("+tgetent ");
# else
		version_msg("-tgetent ");
# endif
#endif
#ifdef VIMINFO
		version_msg("+viminfo ");
#else
		version_msg("-viminfo ");
#endif
#ifdef WRITEBACKUP
		version_msg("+writebackup ");
#else
		version_msg("-writebackup ");
#endif
#ifdef UNIX
# if defined(WANT_X11) && defined(HAVE_X11)
		version_msg("+X11 ");
# else
		version_msg("-X11 ");
# endif
#endif
		msg_outchar('\n');
#ifdef USR_VIMRC_FILE
		version_msg("user vimrc file: \"");
		version_msg(USR_VIMRC_FILE);
		version_msg("\" ");
#endif
#ifdef USR_EXRC_FILE
		version_msg("user exrc file: \"");
		version_msg(USR_EXRC_FILE);
		version_msg("\" ");
#endif
#ifdef USE_GUI
		version_msg("user gvimrc file: \"");
		version_msg(USR_GVIMRC_FILE);
		version_msg("\" ");
#endif
#if defined(HAVE_CONFIG_H) || defined(OS2)
		msg_outchar('\n');
		version_msg("system vimrc file: \"");
		version_msg((char *)sys_vimrc_fname);
		version_msg("\"");
		msg_outchar('\n');
		version_msg("system compatrc file: \"");
		version_msg((char *)sys_compatrc_fname);
		version_msg("\"");
# ifdef USE_GUI
		msg_outchar('\n');
		version_msg("system gvimrc file: \"");
		version_msg((char *)sys_gvimrc_fname);
		MSG_OUTSTR("\"");
# endif
		msg_outchar('\n');
		version_msg("Compilation: ");
		version_msg((char *)all_cflags);
#endif
	}
}

/*
 * Output a string for the version message.  If it's going to wrap, output a
 * newline, unless the message is too long to fit on the screen anyway.
 */
	static void
version_msg(s)
	char		*s;
{
	int		len = strlen(s);

	if (len < (int)Columns && msg_col + len >= (int)Columns)
		msg_outchar('\n');
	MSG_OUTSTR(s);
}