/*
 * This code contains changes by
 * Gunnar Ritter, Freiburg i. Br., Germany, March 2003. All rights reserved.
 *
 * Conditions 1, 2, and 4 and the no-warranty notice below apply
 * to these changes.
 *
 *
 * Copyright (c) 1991
 * 	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 * 	This product includes software developed by the University of
 * 	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *
 * Copyright(C) Caldera International Inc. 2001-2002. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   Redistributions of source code and documentation must retain the
 *    above copyright notice, this list of conditions and the following
 *    disclaimer.
 *   Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *   All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed or owned by Caldera
 *      International, Inc.
 *   Neither the name of Caldera International, Inc. nor the names of
 *    other contributors may be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
 * INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE
 * LIABLE FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*	Sccsid @(#)diff.h	1.15 (gritter) 3/26/05>	*/
/*	from 4.3BSD diff.h	4.7	85/08/16	*/

/*
 * diff - common declarations
 */

#include <stdio.h>
#include <ctype.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <libgen.h>
#include <errno.h>
#include <setjmp.h>

#if defined (__GLIBC__)
#if defined (_IO_getc_unlocked)
#undef	getc
#define	getc(f)		_IO_getc_unlocked(f)
#endif
#if defined (_IO_putc_unlocked)
#undef	putc
#define	putc(c, f)	_IO_putc_unlocked(c, f)
#undef	putchar
#define	putchar(c)	_IO_putc_unlocked(c, stdout)
#endif
#endif

/*
 * Output format options
 */
int	opt;

#define	D_NORMAL	0	/* Normal output */
#define	D_EDIT		-1	/* Editor script out */
#define	D_REVERSE	1	/* Reverse editor script */
#define	D_CONTEXT	2	/* Diff with context */
#define	D_IFDEF		3	/* Diff with merged #ifdef's */
#define	D_NREVERSE	4	/* Reverse ed script with numbered
				   lines and no trailing . */
#define	D_UNIFIED	5	/* Unified diff */

int	aflag;			/* diff binary files */
int	tflag;			/* expand tabs on output */
int	pflag;			/* show surrounding C function */

/*
 * Algorithm related options
 */
int	hflag;			/* -h, use halfhearted DIFFH */
int	bflag;			/* ignore blanks in comparisons */
int	wflag;			/* totally ignore blanks in comparisons */
int	iflag;			/* ignore case in comparisons */
int	Bflag;			/* ignore changes that consist of blank lines */

/*
 * Options on hierarchical diffs.
 */
int	lflag;			/* long output format with header */
int	rflag;			/* recursively trace directories */
int	sflag;			/* announce files which are same */
int	Nflag;			/* write text of nonexistant files */
const char	*start;		/* do file only if name >= this */

struct xclusion {
	struct xclusion	*x_nxt;
	const char	*x_pat;
}	*xflag;			/* patterns to exclude from comparison */

/*
 * Variables for -I D_IFDEF option.
 */
int	wantelses;		/* -E */
char	*ifdef1;		/* String for -1 */
char	*ifdef2;		/* String for -2 */
char	*endifname;		/* What we will print on next #endif */
int	inifdef;

/*
 * Variables for -c context option.
 */
int	context;		/* lines of context to be printed */

/*
 * State for exit status.
 */
int	status;
int	anychange;
char	*tempfile1;		/* used when comparing against std input */
char	*tempfile2;		/* used when comparing against std input */

/*
 * Variables for diffdir.
 */
char	**diffargv;		/* option list to pass to recursive diffs */
int	recdepth;		/* recursion depth */
jmp_buf	recenv;			/* jump stack on error */

struct stackblk {
	struct stackblk	*s_prev;
	struct stackblk	*s_next;
} *curstack;

/*
 * Input file names.
 * With diffdir, file1 and file2 are allocated BUFSIZ space,
 * and padded with a '/', and then efile0 and efile1 point after
 * the '/'.
 */
char	*file1, *file2, *efile1, *efile2;
struct	stat stb1, stb2;

extern	const char diffh[], diff[], pr[];
extern	const char *argv0;
extern	const char *progname;
int	mb_cur_max;
extern int	sysv3;

/* diff.c */
void	diffany(char **);
int	min(int, int);
int	max(int, int);
void	done(void);
void	*dalloc(size_t);
void	*talloc(size_t);
void	*ralloc(void *, size_t);
void	tfree(void *);
void	purgestack(void);
void	oomsg(const char *);
/* diffdir.c */
void	diffdir(char **);
int	ascii(int);
/* diffreg.c */
void	diffreg(void);