1 /* $OpenBSD: diff.h,v 1.34 2020/11/01 18:16:08 jcs Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 1991, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/types.h> 35 36 #include <stdbool.h> 37 #include <regex.h> 38 39 /* 40 * Output format options 41 */ 42 #define D_NORMAL 0 /* Normal output */ 43 #define D_EDIT -1 /* Editor script out */ 44 #define D_REVERSE 1 /* Reverse editor script */ 45 #define D_CONTEXT 2 /* Diff with context */ 46 #define D_UNIFIED 3 /* Unified context diff */ 47 #define D_IFDEF 4 /* Diff with merged #ifdef's */ 48 #define D_NREVERSE 5 /* Reverse ed script with numbered 49 lines and no trailing . */ 50 #define D_BRIEF 6 /* Say if the files differ */ 51 #define D_GFORMAT 7 /* Diff with defined changed group format */ 52 #define D_SIDEBYSIDE 8 /* Side by side */ 53 54 #define D_UNSET -2 55 56 /* 57 * Algorithms 58 */ 59 60 #define D_DIFFNONE 0 61 #define D_DIFFSTONE 1 /* Stone or 'old diff' algorithm */ 62 #define D_DIFFMYERS 2 /* Myers diff algorithm */ 63 #define D_DIFFPATIENCE 3 /* Patience diff algorithm */ 64 65 /* 66 * Output flags 67 */ 68 #define D_HEADER 0x001 /* Print a header/footer between files */ 69 #define D_EMPTY1 0x002 /* Treat first file as empty (/dev/null) */ 70 #define D_EMPTY2 0x004 /* Treat second file as empty (/dev/null) */ 71 72 /* 73 * Command line flags 74 */ 75 #define D_FORCEASCII 0x008 /* Treat file as ascii regardless of content */ 76 #define D_FOLDBLANKS 0x010 /* Treat all white space as equal */ 77 #define D_MINIMAL 0x020 /* Make diff as small as possible */ 78 #define D_IGNORECASE 0x040 /* Case-insensitive matching */ 79 #define D_PROTOTYPE 0x080 /* Display C function prototype */ 80 #define D_EXPANDTABS 0x100 /* Expand tabs to spaces */ 81 #define D_IGNOREBLANKS 0x200 /* Ignore white space changes */ 82 #define D_STRIPCR 0x400 /* Strip trailing cr */ 83 #define D_SKIPBLANKLINES 0x800 /* Skip blank lines */ 84 #define D_MATCHLAST 0x1000 /* Display last line matching provided regex */ 85 #define D_PAGINATION 0x2000 /* Paginate via pr(1) */ 86 87 /* Features supported by new algorithms */ 88 #define D_NEWALGO_FLAGS (D_FORCEASCII | D_PROTOTYPE | D_IGNOREBLANKS) 89 90 /* 91 * Status values for print_status() and diffreg() return values 92 */ 93 #define D_SAME 0 /* Files are the same */ 94 #define D_DIFFER 1 /* Files are different */ 95 #define D_BINARY 2 /* Binary files are different */ 96 #define D_MISMATCH1 3 /* path1 was a dir, path2 a file */ 97 #define D_MISMATCH2 4 /* path1 was a file, path2 a dir */ 98 #define D_SKIPPED1 5 /* path1 was a special file */ 99 #define D_SKIPPED2 6 /* path2 was a special file */ 100 #define D_ERROR 7 /* A file access error occurred */ 101 102 /* 103 * Color options 104 */ 105 #define COLORFLAG_NEVER 0 106 #define COLORFLAG_AUTO 1 107 #define COLORFLAG_ALWAYS 2 108 109 struct excludes { 110 char *pattern; 111 struct excludes *next; 112 }; 113 114 extern bool lflag, Nflag, Pflag, rflag, sflag, Tflag, cflag; 115 extern bool ignore_file_case, suppress_common, color, noderef, algorithm_set; 116 extern int diff_format, diff_context, diff_algorithm, status; 117 extern bool diff_algorithm_set; 118 extern int tabsize, width; 119 extern char *start, *ifdefname, *diffargs, *label[2]; 120 extern char *ignore_pats, *most_recent_pat; 121 extern char *group_format; 122 extern const char *add_code, *del_code; 123 extern struct stat stb1, stb2; 124 extern struct excludes *excludes_list; 125 extern regex_t ignore_re, most_recent_re; 126 127 int diffreg(char *, char *, int, int); 128 int diffreg_new(char *, char *, int, int); 129 bool can_libdiff(int); 130 void diffdir(char *, char *, int); 131 void print_status(int, char *, char *, const char *); 132