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/* $OpenBSD: diff.h,v 1.34 2020/11/01 18:16:08 jcs Exp $ */
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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.
*/
#include <sys/types.h>
#include <stdbool.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 */
#define D_GFORMAT 7 /* Diff with defined changed group format */
#define D_SIDEBYSIDE 8 /* Side by side */
#define D_UNSET -2
/*
* Algorithms
*/
#define D_DIFFNONE 0
#define D_DIFFSTONE 1 /* Stone or 'old diff' algorithm */
#define D_DIFFMYERS 2 /* Myers diff algorithm */
#define D_DIFFPATIENCE 3 /* Patience diff algorithm */
/*
* 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 */
#define D_STRIPCR 0x400 /* Strip trailing cr */
#define D_SKIPBLANKLINES 0x800 /* Skip blank lines */
#define D_MATCHLAST 0x1000 /* Display last line matching provided regex */
#define D_PAGINATION 0x2000 /* Paginate via pr(1) */
/* Features supported by new algorithms */
#define D_NEWALGO_FLAGS (D_FORCEASCII | D_PROTOTYPE | D_IGNOREBLANKS)
/*
* 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 */
#define D_ERROR 7 /* A file access error occurred */
/*
* Color options
*/
#define COLORFLAG_NEVER 0
#define COLORFLAG_AUTO 1
#define COLORFLAG_ALWAYS 2
struct excludes {
char *pattern;
struct excludes *next;
};
extern bool lflag, Nflag, Pflag, rflag, sflag, Tflag, cflag;
extern bool ignore_file_case, suppress_common, color, noderef, algorithm_set;
extern int diff_format, diff_context, diff_algorithm, status;
extern bool diff_algorithm_set;
extern int tabsize, width;
extern char *start, *ifdefname, *diffargs, *label[2];
extern char *ignore_pats, *most_recent_pat;
extern char *group_format;
extern const char *add_code, *del_code;
extern struct stat stb1, stb2;
extern struct excludes *excludes_list;
extern regex_t ignore_re, most_recent_re;
int diffreg(char *, char *, int, int);
int diffreg_new(char *, char *, int, int);
bool can_libdiff(int);
void diffdir(char *, char *, int);
void print_status(int, char *, char *, const char *);
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