/*      $OpenBSD: diff.h,v 1.35 2024/05/21 05:00:48 jsg Exp $    */

/*
 * Copyright (c) 1991, 1993
 *      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. 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.
 *
 *      @(#)diff.h      8.1 (Berkeley) 6/6/93
 */

#include <sys/types.h>
#include <regex.h>

/*
 * Output format options
 */
#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_UNIFIED       3       /* Unified context diff */
#define D_IFDEF         4       /* Diff with merged #ifdef's */
#define D_NREVERSE      5       /* Reverse ed script with numbered
                                   lines and no trailing . */
#define D_BRIEF         6       /* Say if the files differ */

/*
 * Output flags
 */
#define D_HEADER        0x001   /* Print a header/footer between files */
#define D_EMPTY1        0x002   /* Treat first file as empty (/dev/null) */
#define D_EMPTY2        0x004   /* Treat second file as empty (/dev/null) */

/*
 * Command line flags
 */
#define D_FORCEASCII    0x008   /* Treat file as ascii regardless of content */
#define D_FOLDBLANKS    0x010   /* Treat all white space as equal */
#define D_MINIMAL       0x020   /* Make diff as small as possible */
#define D_IGNORECASE    0x040   /* Case-insensitive matching */
#define D_PROTOTYPE     0x080   /* Display C function prototype */
#define D_EXPANDTABS    0x100   /* Expand tabs to spaces */
#define D_IGNOREBLANKS  0x200   /* Ignore white space changes */

/*
 * Status values for print_status() and diffreg() return values
 */
#define D_SAME          0       /* Files are the same */
#define D_DIFFER        1       /* Files are different */
#define D_BINARY        2       /* Binary files are different */
#define D_MISMATCH1     3       /* path1 was a dir, path2 a file */
#define D_MISMATCH2     4       /* path1 was a file, path2 a dir */
#define D_SKIPPED1      5       /* path1 was a special file */
#define D_SKIPPED2      6       /* path2 was a special file */

struct excludes {
        char *pattern;
        struct excludes *next;
};

extern int      Nflag, Pflag, rflag, sflag, Tflag;
extern int      diff_format, diff_context, status;
extern char     *start, *ifdefname, *diffargs, *label[2], *ignore_pats;
extern struct   stat stb1, stb2;
extern struct   excludes *excludes_list;
extern regex_t  ignore_re;

char    *splice(char *, char *);
int     diffreg(char *, char *, int);
void    diffdir(char *, char *, int);
void    print_only(const char *, size_t, const char *);
void    print_status(int, char *, char *, char *);