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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: unix.h,v 1.1.1.1 1996/09/07 21:40:27 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 <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
 
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#ifdef HAVE_LIBC_H
# include <libc.h>					/* for NeXT */
#endif

/*
 * SVR4 may be defined for linux, but linux isn't SVR4
 */
#if defined(SVR4) && defined(__linux__)
# undef SVR4
#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
# if defined(__STDC__) || defined(__GNUC__)
#  define __ARGS(x) x
# else
#  define __ARGS(x) ()
# endif
#endif

/* always use unlink() to remove files */
#define vim_remove(x) unlink((char *)(x))

/* 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??? */
/* #if defined(SVR4) || (defined(SYSV) && defined(ISC)) || defined(_AIX) || defined(__linux__) || defined(ultrix) || defined(__386BSD__) || defined(__FreeBSD__) || defined(__bsdi__) || defined(POSIX) || defined(NeXT)  || defined(__alpha) || defined(apollo) */
#if !defined(SOME_SYSTEM)
# define SIGHASARG
#endif

/* List 3 arg systems here. I guess __sgi, please test and correct me. jw. */
#if defined(__sgi)
# 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

#if HAVE_DIRENT_H
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#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

#ifdef HAVE_ERRNO_H
# include <errno.h>
#endif

#ifdef HAVE_PWD_H
# include <pwd.h>
#endif

#ifdef __COHERENT__
# undef __ARGS
#endif /* __COHERENT__ */

#ifndef W_OK
# define W_OK 2			/* for systems that don't have W_OK in unistd.h */
#endif

/*
 * Unix system-dependent filenames
 */

#ifndef USR_EXRC_FILE
# define USR_EXRC_FILE	"$HOME/.exrc"
#endif

#ifndef USR_VIMRC_FILE
# define USR_VIMRC_FILE	"$HOME/.vimrc"
#endif

#ifdef USE_GUI
# ifndef USR_GVIMRC_FILE
#  define USR_GVIMRC_FILE	"$HOME/.gvimrc"
# endif
#endif

#ifndef EXRC_FILE
# define EXRC_FILE		".exrc"
#endif

#ifndef VIMRC_FILE
# define VIMRC_FILE		".vimrc"
#endif

#ifdef USE_GUI
# ifndef GVIMRC_FILE
#  define GVIMRC_FILE	".gvimrc"
# endif
#endif

#ifdef VIMINFO
# ifndef VIMINFO_FILE
#  define VIMINFO_FILE	"$HOME/.viminfo"
# endif
#endif /* VIMINFO */

#ifndef DEF_BDIR
# ifdef OS2
#  define DEF_BDIR		".,c:/tmp,~/tmp,~/"
# else
#  define DEF_BDIR		".,~/tmp,~/"	/* default for 'backupdir' */
# endif
#endif

#ifndef DEF_DIR
# ifdef OS2
#  define DEF_DIR		".,~/tmp,c:/tmp,/tmp"
# else
#  define DEF_DIR		".,~/tmp,/tmp"	/* default for 'directory' */
# endif
#endif

#ifdef OS2
#define TMPNAME1		"$TMP/viXXXXXX"
#define TMPNAME2		"$TMP/voXXXXXX"
#define TMPNAMELEN		128
#else
#define TMPNAME1		"/tmp/viXXXXXX"
#define TMPNAME2		"/tmp/voXXXXXX"
#define TMPNAMELEN		15
#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 */
#define USE_MOUSE				/* include mouse support */

#ifndef MAXMEM
# define MAXMEM			512			/* use up to 512Kbyte for buffer */
#endif
#ifndef MAXMEMTOT
# define MAXMEMTOT		2048		/* use up to 2048Kbyte for Vim */
#endif

#define BASENAMELEN		(MAXNAMLEN - 5)

/* 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 vim_memmove(to, from, len) memmove((char *)(to), (char *)(from), len)
#else
# ifdef USEBCOPY
#  define vim_memmove(to, from, len) bcopy((char *)(from), (char *)(to), len)
# else
#  ifdef USEMEMCPY
#   define vim_memmove(to, from, len) memcpy((char *)(to), (char *)(from), len)
#  else
#   define VIM_MEMMOVE		/* found in alloc.c */
#  endif
# endif
#endif

/* codes for xterm mouse event */
#define MOUSE_LEFT		0x00
#define MOUSE_MIDDLE	0x01
#define MOUSE_RIGHT		0x02
#define MOUSE_RELEASE	0x03
#define MOUSE_SHIFT		0x04
#define MOUSE_ALT		0x08
#define MOUSE_CTRL		0x10
#define MOUSE_DRAG		(0x40 | MOUSE_RELEASE)

#define MOUSE_CLICK_MASK	0x03

#define NUM_MOUSE_CLICKS(code) \
	((((code) & 0xff) >> 6) + 1)

#define SET_NUM_MOUSE_CLICKS(code, num) \
	(code) = ((code) & 0x3f) + (((num) - 1) << 6)