1 /* System dependent declarations. 2 Copyright (C) 1988, 1989, 1992, 1993, 1994 Free Software Foundation, Inc. 3 4 This file is part of GNU DIFF. 5 6 GNU DIFF is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU DIFF is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 */ 17 18 /* We must define `volatile' and `const' first (the latter inside config.h), 19 so that they're used consistently in all system includes. */ 20 #if !__STDC__ 21 #ifndef volatile 22 #define volatile 23 #endif 24 #endif 25 #include <config.h> 26 27 #include <sys/types.h> 28 #include <sys/stat.h> 29 30 /* Note that PARAMS is just internal to the diff library; diffrun.h 31 has its own mechanism, which will hopefully be less likely to 32 conflict with the library's caller's namespace. */ 33 #if __STDC__ 34 #define PARAMS(args) args 35 #define VOID void 36 #else 37 #define PARAMS(args) () 38 #define VOID char 39 #endif 40 41 #if STAT_MACROS_BROKEN 42 #undef S_ISBLK 43 #undef S_ISCHR 44 #undef S_ISDIR 45 #undef S_ISFIFO 46 #undef S_ISREG 47 #undef S_ISSOCK 48 #endif 49 #ifndef S_ISDIR 50 #define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR) 51 #endif 52 #ifndef S_ISREG 53 #define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG) 54 #endif 55 #if !defined(S_ISBLK) && defined(S_IFBLK) 56 #define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK) 57 #endif 58 #if !defined(S_ISCHR) && defined(S_IFCHR) 59 #define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR) 60 #endif 61 #if !defined(S_ISFIFO) && defined(S_IFFIFO) 62 #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFFIFO) 63 #endif 64 #if !defined(S_ISSOCK) && defined(S_IFSOCK) 65 #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK) 66 #endif 67 68 #if HAVE_UNISTD_H 69 #include <unistd.h> 70 #endif 71 72 #ifndef SEEK_SET 73 #define SEEK_SET 0 74 #endif 75 #ifndef SEEK_CUR 76 #define SEEK_CUR 1 77 #endif 78 79 #ifndef STDIN_FILENO 80 #define STDIN_FILENO 0 81 #endif 82 #ifndef STDOUT_FILENO 83 #define STDOUT_FILENO 1 84 #endif 85 #ifndef STDERR_FILENO 86 #define STDERR_FILENO 2 87 #endif 88 89 /* I believe that all relevant systems have 90 time.h. It is in ANSI, for example. The 91 code below looks quite bogus as I don't think 92 sys/time.h is ever a substitute for time.h; 93 it is something different. */ 94 #define HAVE_TIME_H 1 95 96 #if HAVE_TIME_H 97 #include <time.h> 98 #else 99 #include <sys/time.h> 100 #endif 101 102 #if HAVE_FCNTL_H 103 #include <fcntl.h> 104 #else 105 #if HAVE_SYS_FILE_H 106 #include <sys/file.h> 107 #endif 108 #endif 109 110 #ifndef O_RDONLY 111 #define O_RDONLY 0 112 #endif 113 114 #if HAVE_SYS_WAIT_H 115 #include <sys/wait.h> 116 #endif 117 #ifndef WEXITSTATUS 118 #define WEXITSTATUS(stat_val) ((unsigned) (stat_val) >> 8) 119 #endif 120 #ifndef WIFEXITED 121 #define WIFEXITED(stat_val) (((stat_val) & 255) == 0) 122 #endif 123 124 #ifndef STAT_BLOCKSIZE 125 #if HAVE_ST_BLKSIZE 126 #define STAT_BLOCKSIZE(s) (s).st_blksize 127 #else 128 #define STAT_BLOCKSIZE(s) (8 * 1024) 129 #endif 130 #endif 131 132 #if HAVE_DIRENT_H 133 # include <dirent.h> 134 # define NAMLEN(dirent) strlen((dirent)->d_name) 135 #else 136 # define dirent direct 137 # define NAMLEN(dirent) ((dirent)->d_namlen) 138 # if HAVE_SYS_NDIR_H 139 # include <sys/ndir.h> 140 # endif 141 # if HAVE_SYS_DIR_H 142 # include <sys/dir.h> 143 # endif 144 # if HAVE_NDIR_H 145 # include <ndir.h> 146 # endif 147 #endif 148 149 #if HAVE_VFORK_H 150 #include <vfork.h> 151 #endif 152 153 #if HAVE_STDLIB_H || defined(STDC_HEADERS) 154 #include <stdlib.h> 155 #else 156 VOID *malloc (); 157 VOID *realloc (); 158 #endif 159 #ifndef getenv 160 char *getenv (); 161 #endif 162 163 #if HAVE_LIMITS_H 164 #include <limits.h> 165 #endif 166 #ifndef INT_MAX 167 #define INT_MAX 2147483647 168 #endif 169 #ifndef CHAR_BIT 170 #define CHAR_BIT 8 171 #endif 172 173 #if STDC_HEADERS || HAVE_STRING_H 174 # include <string.h> 175 # ifndef bzero 176 # define bzero(s, n) memset (s, 0, n) 177 # endif 178 #else 179 # if !HAVE_STRCHR 180 # define strchr index 181 # define strrchr rindex 182 # endif 183 char *strchr (), *strrchr (); 184 # if !HAVE_MEMCHR 185 # define memcmp(s1, s2, n) bcmp (s1, s2, n) 186 # define memcpy(d, s, n) bcopy (s, d, n) 187 void *memchr (); 188 # endif 189 #endif 190 191 #include <ctype.h> 192 /* CTYPE_DOMAIN (C) is nonzero if the unsigned char C can safely be given 193 as an argument to <ctype.h> macros like `isspace'. */ 194 #if STDC_HEADERS 195 #define CTYPE_DOMAIN(c) 1 196 #else 197 #define CTYPE_DOMAIN(c) ((unsigned) (c) <= 0177) 198 #endif 199 #ifndef ISPRINT 200 #define ISPRINT(c) (CTYPE_DOMAIN (c) && isprint (c)) 201 #endif 202 #ifndef ISSPACE 203 #define ISSPACE(c) (CTYPE_DOMAIN (c) && isspace (c)) 204 #endif 205 #ifndef ISUPPER 206 #define ISUPPER(c) (CTYPE_DOMAIN (c) && isupper (c)) 207 #endif 208 209 #ifndef ISDIGIT 210 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9) 211 #endif 212 213 #include <errno.h> 214 #if !STDC_HEADERS 215 extern int errno; 216 #endif 217 218 #ifdef min 219 #undef min 220 #endif 221 #ifdef max 222 #undef max 223 #endif 224 #define min(a,b) ((a) <= (b) ? (a) : (b)) 225 #define max(a,b) ((a) >= (b) ? (a) : (b)) 226 227 /* This section contains Posix-compliant defaults for macros 228 that are meant to be overridden by hand in config.h as needed. */ 229 230 #ifndef filename_cmp 231 #define filename_cmp(a, b) strcmp (a, b) 232 #endif 233 234 #ifndef filename_lastdirchar 235 #define filename_lastdirchar(filename) strrchr (filename, '/') 236 #endif 237 238 #ifndef HAVE_FORK 239 #define HAVE_FORK 1 240 #endif 241 242 #ifndef HAVE_SETMODE 243 #define HAVE_SETMODE 0 244 #endif 245 246 #ifndef initialize_main 247 #define initialize_main(argcp, argvp) 248 #endif 249 250 /* Do struct stat *S, *T describe the same file? Answer -1 if unknown. */ 251 #ifndef same_file 252 #define same_file(s,t) ((s)->st_ino==(t)->st_ino && (s)->st_dev==(t)->st_dev) 253 #endif 254 255 /* Place into Q a quoted version of A suitable for `popen' or `system', 256 incrementing Q and junking A. 257 Do not increment Q by more than 4 * strlen (A) + 2. */ 258 #ifndef SYSTEM_QUOTE_ARG 259 #define SYSTEM_QUOTE_ARG(q, a) \ 260 { \ 261 *(q)++ = '\''; \ 262 for (; *(a); *(q)++ = *(a)++) \ 263 if (*(a) == '\'') \ 264 { \ 265 *(q)++ = '\''; \ 266 *(q)++ = '\\'; \ 267 *(q)++ = '\''; \ 268 } \ 269 *(q)++ = '\''; \ 270 } 271 #endif 272 273 /* these come from CVS's lib/system.h, but I wasn't sure how to include that 274 * properly or even if I really should 275 */ 276 #ifndef CVS_OPENDIR 277 #define CVS_OPENDIR opendir 278 #endif 279 #ifndef CVS_READDIR 280 #define CVS_READDIR readdir 281 #endif 282 #ifndef CVS_CLOSEDIR 283 #define CVS_CLOSEDIR closedir 284 #endif 285