1/* $OpenBSD: diff.h,v 1.34 2020/11/01 18:16:08 jcs Exp $ */ 2 3/*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/types.h> 33 34#include <stdbool.h> 35#include <regex.h> 36 37/* 38 * Output format options 39 */ 40#define D_NORMAL 0 /* Normal output */ 41#define D_EDIT -1 /* Editor script out */ 42#define D_REVERSE 1 /* Reverse editor script */ 43#define D_CONTEXT 2 /* Diff with context */ 44#define D_UNIFIED 3 /* Unified context diff */ 45#define D_IFDEF 4 /* Diff with merged #ifdef's */ 46#define D_NREVERSE 5 /* Reverse ed script with numbered 47 lines and no trailing . */ 48#define D_BRIEF 6 /* Say if the files differ */ 49#define D_GFORMAT 7 /* Diff with defined changed group format */ 50#define D_SIDEBYSIDE 8 /* Side by side */ 51 52#define D_UNSET -2 53 54/* 55 * Algorithms 56 */ 57 58#define D_DIFFNONE 0 59#define D_DIFFSTONE 1 /* Stone or 'old diff' algorithm */ 60#define D_DIFFMYERS 2 /* Myers diff algorithm */ 61#define D_DIFFPATIENCE 3 /* Patience diff algorithm */ 62 63/* 64 * Output flags 65 */ 66#define D_HEADER 0x001 /* Print a header/footer between files */ 67#define D_EMPTY1 0x002 /* Treat first file as empty (/dev/null) */ 68#define D_EMPTY2 0x004 /* Treat second file as empty (/dev/null) */ 69 70/* 71 * Command line flags 72 */ 73#define D_FORCEASCII 0x008 /* Treat file as ascii regardless of content */ 74#define D_FOLDBLANKS 0x010 /* Treat all white space as equal */ 75#define D_MINIMAL 0x020 /* Make diff as small as possible */ 76#define D_IGNORECASE 0x040 /* Case-insensitive matching */ 77#define D_PROTOTYPE 0x080 /* Display C function prototype */ 78#define D_EXPANDTABS 0x100 /* Expand tabs to spaces */ 79#define D_IGNOREBLANKS 0x200 /* Ignore white space changes */ 80#define D_STRIPCR 0x400 /* Strip trailing cr */ 81#define D_SKIPBLANKLINES 0x800 /* Skip blank lines */ 82#define D_MATCHLAST 0x1000 /* Display last line matching provided regex */ 83 84/* Features supported by new algorithms */ 85#define D_NEWALGO_FLAGS (D_FORCEASCII | D_PROTOTYPE | D_IGNOREBLANKS) 86 87/* 88 * Status values for print_status() and diffreg() return values 89 */ 90#define D_SAME 0 /* Files are the same */ 91#define D_DIFFER 1 /* Files are different */ 92#define D_BINARY 2 /* Binary files are different */ 93#define D_MISMATCH1 3 /* path1 was a dir, path2 a file */ 94#define D_MISMATCH2 4 /* path1 was a file, path2 a dir */ 95#define D_SKIPPED1 5 /* path1 was a special file */ 96#define D_SKIPPED2 6 /* path2 was a special file */ 97#define D_ERROR 7 /* A file access error occurred */ 98 99/* 100 * Color options 101 */ 102#define COLORFLAG_NEVER 0 103#define COLORFLAG_AUTO 1 104#define COLORFLAG_ALWAYS 2 105 106struct excludes { 107 char *pattern; 108 struct excludes *next; 109}; 110 111extern bool lflag, Nflag, Pflag, rflag, sflag, Tflag, cflag; 112extern bool ignore_file_case, suppress_common, color, noderef, algorithm_set; 113extern int diff_format, diff_context, diff_algorithm, status; 114extern bool diff_algorithm_set; 115extern int tabsize, width; 116extern char *start, *ifdefname, *diffargs, *label[2]; 117extern char *ignore_pats, *most_recent_pat; 118extern char *group_format; 119extern const char *add_code, *del_code; 120extern struct stat stb1, stb2; 121extern struct excludes *excludes_list; 122extern regex_t ignore_re, most_recent_re; 123 124int diffreg(char *, char *, int, int); 125int diffreg_new(char *, char *, int, int); 126bool can_libdiff(int); 127void diffdir(char *, char *, int); 128void print_status(int, char *, char *, const char *); 129