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 65 #ifndef S_ISSOCK 66 # if defined( S_IFSOCK ) 67 # ifdef S_IFMT 68 # define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK) 69 # else 70 # define S_ISSOCK(mode) ((mode) & S_IFSOCK) 71 # endif /* S_IFMT */ 72 # elif defined( S_ISNAM ) 73 /* SCO OpenServer 5.0.6a */ 74 # define S_ISSOCK S_ISNAM 75 # endif /* !S_IFSOCK && S_ISNAM */ 76 #endif /* !S_ISSOCK */ 77 78 #if HAVE_UNISTD_H 79 #include <unistd.h> 80 #endif 81 82 #ifdef HAVE_IO_H 83 # include <io.h> 84 #endif 85 86 #ifdef HAVE_FCNTL_H 87 # include <fcntl.h> 88 #else 89 # include <sys/file.h> 90 #endif 91 92 #ifndef SEEK_SET 93 #define SEEK_SET 0 94 #endif 95 #ifndef SEEK_CUR 96 #define SEEK_CUR 1 97 #endif 98 99 #ifndef STDIN_FILENO 100 #define STDIN_FILENO 0 101 #endif 102 #ifndef STDOUT_FILENO 103 #define STDOUT_FILENO 1 104 #endif 105 #ifndef STDERR_FILENO 106 #define STDERR_FILENO 2 107 #endif 108 109 /* I believe that all relevant systems have 110 time.h. It is in ANSI, for example. The 111 code below looks quite bogus as I don't think 112 sys/time.h is ever a substitute for time.h; 113 it is something different. */ 114 #define HAVE_TIME_H 1 115 116 #if HAVE_TIME_H 117 #include <time.h> 118 #else 119 #include <sys/time.h> 120 #endif 121 122 #if HAVE_FCNTL_H 123 #include <fcntl.h> 124 #else 125 #if HAVE_SYS_FILE_H 126 #include <sys/file.h> 127 #endif 128 #endif 129 130 #ifndef O_RDONLY 131 #define O_RDONLY 0 132 #endif 133 134 #if HAVE_SYS_WAIT_H 135 #include <sys/wait.h> 136 #endif 137 #ifndef WEXITSTATUS 138 #define WEXITSTATUS(stat_val) ((unsigned) (stat_val) >> 8) 139 #endif 140 #ifndef WIFEXITED 141 #define WIFEXITED(stat_val) (((stat_val) & 255) == 0) 142 #endif 143 144 #ifndef STAT_BLOCKSIZE 145 #if HAVE_STRUCT_STAT_ST_BLKSIZE 146 #define STAT_BLOCKSIZE(s) (s).st_blksize 147 #else 148 #define STAT_BLOCKSIZE(s) (8 * 1024) 149 #endif 150 #endif 151 152 #if HAVE_DIRENT_H 153 # include <dirent.h> 154 # define NAMLEN(dirent) strlen((dirent)->d_name) 155 #else 156 # define dirent direct 157 # define NAMLEN(dirent) ((dirent)->d_namlen) 158 # if HAVE_SYS_NDIR_H 159 # include <sys/ndir.h> 160 # endif 161 # if HAVE_SYS_DIR_H 162 # include <sys/dir.h> 163 # endif 164 # if HAVE_NDIR_H 165 # include <ndir.h> 166 # endif 167 #endif 168 169 #if HAVE_VFORK_H 170 #include <vfork.h> 171 #endif 172 173 #if HAVE_STDLIB_H || defined(STDC_HEADERS) 174 #include <stdlib.h> 175 #else 176 VOID *malloc (); 177 VOID *realloc (); 178 #endif 179 #ifndef getenv 180 char *getenv (); 181 #endif 182 183 #include <limits.h> 184 #ifndef INT_MAX 185 #define INT_MAX 2147483647 186 #endif 187 #ifndef CHAR_BIT 188 #define CHAR_BIT 8 189 #endif 190 191 #if STDC_HEADERS || HAVE_STRING_H 192 # include <string.h> 193 # ifndef bzero 194 # define bzero(s, n) memset (s, 0, n) 195 # endif 196 #else 197 # if !HAVE_STRCHR 198 # define strchr index 199 # define strrchr rindex 200 # endif 201 char *strchr (), *strrchr (); 202 # if !HAVE_MEMCHR 203 # define memcmp(s1, s2, n) bcmp (s1, s2, n) 204 # define memcpy(d, s, n) bcopy (s, d, n) 205 void *memchr (); 206 # endif 207 #endif 208 209 #include <ctype.h> 210 /* CTYPE_DOMAIN (C) is nonzero if the unsigned char C can safely be given 211 as an argument to <ctype.h> macros like `isspace'. */ 212 #if STDC_HEADERS 213 #define CTYPE_DOMAIN(c) 1 214 #else 215 #define CTYPE_DOMAIN(c) ((unsigned) (c) <= 0177) 216 #endif 217 #ifndef ISPRINT 218 #define ISPRINT(c) (CTYPE_DOMAIN (c) && isprint (c)) 219 #endif 220 #ifndef ISSPACE 221 #define ISSPACE(c) (CTYPE_DOMAIN (c) && isspace (c)) 222 #endif 223 #ifndef ISUPPER 224 #define ISUPPER(c) (CTYPE_DOMAIN (c) && isupper (c)) 225 #endif 226 227 #ifndef ISDIGIT 228 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9) 229 #endif 230 231 #include <errno.h> 232 #if !STDC_HEADERS 233 extern int errno; 234 #endif 235 236 #ifdef min 237 #undef min 238 #endif 239 #ifdef max 240 #undef max 241 #endif 242 #define min(a,b) ((a) <= (b) ? (a) : (b)) 243 #define max(a,b) ((a) >= (b) ? (a) : (b)) 244 245 /* This section contains Posix-compliant defaults for macros 246 that are meant to be overridden by hand in config.h as needed. */ 247 248 #ifndef filename_cmp 249 #define filename_cmp(a, b) strcmp (a, b) 250 #endif 251 252 #ifndef filename_lastdirchar 253 #define filename_lastdirchar(filename) strrchr (filename, '/') 254 #endif 255 256 #ifndef HAVE_FORK 257 #define HAVE_FORK 1 258 #endif 259 260 #ifndef HAVE_SETMODE 261 #define HAVE_SETMODE 0 262 #endif 263 264 #ifndef initialize_main 265 #define initialize_main(argcp, argvp) 266 #endif 267 268 /* Do struct stat *S, *T describe the same file? Answer -1 if unknown. */ 269 #ifndef same_file 270 #define same_file(s,t) ((s)->st_ino==(t)->st_ino && (s)->st_dev==(t)->st_dev) 271 #endif 272 273 /* Place into Q a quoted version of A suitable for `popen' or `system', 274 incrementing Q and junking A. 275 Do not increment Q by more than 4 * strlen (A) + 2. */ 276 #ifndef SYSTEM_QUOTE_ARG 277 #define SYSTEM_QUOTE_ARG(q, a) \ 278 { \ 279 *(q)++ = '\''; \ 280 for (; *(a); *(q)++ = *(a)++) \ 281 if (*(a) == '\'') \ 282 { \ 283 *(q)++ = '\''; \ 284 *(q)++ = '\\'; \ 285 *(q)++ = '\''; \ 286 } \ 287 *(q)++ = '\''; \ 288 } 289 #endif 290 291 /* these come from CVS's lib/system.h, but I wasn't sure how to include that 292 * properly or even if I really should 293 */ 294 #ifndef CVS_OPENDIR 295 #define CVS_OPENDIR opendir 296 #endif 297 #ifndef CVS_READDIR 298 #define CVS_READDIR readdir 299 #endif 300 #ifndef CVS_CLOSEDIR 301 #define CVS_CLOSEDIR closedir 302 #endif 303