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 You should have received a copy of the GNU General Public License 17 along with GNU DIFF; see the file COPYING. If not, write to 18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ 19 20 /* We must define `volatile' and `const' first (the latter inside config.h), 21 so that they're used consistently in all system includes. */ 22 #if !__STDC__ 23 #ifndef volatile 24 #define volatile 25 #endif 26 #endif 27 #include <config.h> 28 29 #include <sys/types.h> 30 #include <sys/stat.h> 31 32 #if __STDC__ 33 #define PARAMS(args) args 34 #define VOID void 35 #else 36 #define PARAMS(args) () 37 #define VOID char 38 #endif 39 40 #if STAT_MACROS_BROKEN 41 #undef S_ISBLK 42 #undef S_ISCHR 43 #undef S_ISDIR 44 #undef S_ISFIFO 45 #undef S_ISREG 46 #undef S_ISSOCK 47 #endif 48 #ifndef S_ISDIR 49 #define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR) 50 #endif 51 #ifndef S_ISREG 52 #define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG) 53 #endif 54 #if !defined(S_ISBLK) && defined(S_IFBLK) 55 #define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK) 56 #endif 57 #if !defined(S_ISCHR) && defined(S_IFCHR) 58 #define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR) 59 #endif 60 #if !defined(S_ISFIFO) && defined(S_IFFIFO) 61 #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFFIFO) 62 #endif 63 #if !defined(S_ISSOCK) && defined(S_IFSOCK) 64 #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK) 65 #endif 66 67 #if HAVE_UNISTD_H 68 #include <unistd.h> 69 #endif 70 71 #ifndef SEEK_SET 72 #define SEEK_SET 0 73 #endif 74 #ifndef SEEK_CUR 75 #define SEEK_CUR 1 76 #endif 77 78 #ifndef STDIN_FILENO 79 #define STDIN_FILENO 0 80 #endif 81 #ifndef STDOUT_FILENO 82 #define STDOUT_FILENO 1 83 #endif 84 #ifndef STDERR_FILENO 85 #define STDERR_FILENO 2 86 #endif 87 88 /* I believe that all relevant systems have 89 time.h. It is in ANSI, for example. The 90 code below looks quite bogus as I don't think 91 sys/time.h is ever a substitute for time.h; 92 it is something different. */ 93 #define HAVE_TIME_H 1 94 95 #if HAVE_TIME_H 96 #include <time.h> 97 #else 98 #include <sys/time.h> 99 #endif 100 101 #if HAVE_FCNTL_H 102 #include <fcntl.h> 103 #else 104 #if HAVE_SYS_FILE_H 105 #include <sys/file.h> 106 #endif 107 #endif 108 109 #ifndef O_RDONLY 110 #define O_RDONLY 0 111 #endif 112 113 #if HAVE_SYS_WAIT_H 114 #include <sys/wait.h> 115 #endif 116 #ifndef WEXITSTATUS 117 #define WEXITSTATUS(stat_val) ((unsigned) (stat_val) >> 8) 118 #endif 119 #ifndef WIFEXITED 120 #define WIFEXITED(stat_val) (((stat_val) & 255) == 0) 121 #endif 122 123 #ifndef STAT_BLOCKSIZE 124 #if HAVE_ST_BLKSIZE 125 #define STAT_BLOCKSIZE(s) (s).st_blksize 126 #else 127 #define STAT_BLOCKSIZE(s) (8 * 1024) 128 #endif 129 #endif 130 131 #if HAVE_DIRENT_H 132 # include <dirent.h> 133 # define NAMLEN(dirent) strlen((dirent)->d_name) 134 #else 135 # define dirent direct 136 # define NAMLEN(dirent) ((dirent)->d_namlen) 137 # if HAVE_SYS_NDIR_H 138 # include <sys/ndir.h> 139 # endif 140 # if HAVE_SYS_DIR_H 141 # include <sys/dir.h> 142 # endif 143 # if HAVE_NDIR_H 144 # include <ndir.h> 145 # endif 146 #endif 147 148 #if HAVE_VFORK_H 149 #include <vfork.h> 150 #endif 151 152 #if HAVE_STDLIB_H || defined(STDC_HEADERS) 153 #include <stdlib.h> 154 #else 155 VOID *malloc (); 156 VOID *realloc (); 157 #endif 158 #ifndef getenv 159 char *getenv (); 160 #endif 161 162 #if HAVE_LIMITS_H 163 #include <limits.h> 164 #endif 165 #ifndef INT_MAX 166 #define INT_MAX 2147483647 167 #endif 168 #ifndef CHAR_BIT 169 #define CHAR_BIT 8 170 #endif 171 172 #if STDC_HEADERS || HAVE_STRING_H 173 # include <string.h> 174 # ifndef bzero 175 # define bzero(s, n) memset (s, 0, n) 176 # endif 177 #else 178 # if !HAVE_STRCHR 179 # define strchr index 180 # define strrchr rindex 181 # endif 182 char *strchr (), *strrchr (); 183 # if !HAVE_MEMCHR 184 # define memcmp(s1, s2, n) bcmp (s1, s2, n) 185 # define memcpy(d, s, n) bcopy (s, d, n) 186 void *memchr (); 187 # endif 188 #endif 189 190 #include <ctype.h> 191 /* CTYPE_DOMAIN (C) is nonzero if the unsigned char C can safely be given 192 as an argument to <ctype.h> macros like `isspace'. */ 193 #if STDC_HEADERS 194 #define CTYPE_DOMAIN(c) 1 195 #else 196 #define CTYPE_DOMAIN(c) ((unsigned) (c) <= 0177) 197 #endif 198 #ifndef ISPRINT 199 #define ISPRINT(c) (CTYPE_DOMAIN (c) && isprint (c)) 200 #endif 201 #ifndef ISSPACE 202 #define ISSPACE(c) (CTYPE_DOMAIN (c) && isspace (c)) 203 #endif 204 #ifndef ISUPPER 205 #define ISUPPER(c) (CTYPE_DOMAIN (c) && isupper (c)) 206 #endif 207 208 #ifndef ISDIGIT 209 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9) 210 #endif 211 212 #include <errno.h> 213 #if !STDC_HEADERS 214 extern int errno; 215 #endif 216 217 #ifdef min 218 #undef min 219 #endif 220 #ifdef max 221 #undef max 222 #endif 223 #define min(a,b) ((a) <= (b) ? (a) : (b)) 224 #define max(a,b) ((a) >= (b) ? (a) : (b)) 225 226 /* This section contains Posix-compliant defaults for macros 227 that are meant to be overridden by hand in config.h as needed. */ 228 229 #ifndef filename_cmp 230 #define filename_cmp(a, b) strcmp (a, b) 231 #endif 232 233 #ifndef filename_lastdirchar 234 #define filename_lastdirchar(filename) strrchr (filename, '/') 235 #endif 236 237 #ifndef HAVE_FORK 238 #define HAVE_FORK 1 239 #endif 240 241 #ifndef HAVE_SETMODE 242 #define HAVE_SETMODE 0 243 #endif 244 245 #ifndef initialize_main 246 #define initialize_main(argcp, argvp) 247 #endif 248 249 /* Do struct stat *S, *T describe the same file? Answer -1 if unknown. */ 250 #ifndef same_file 251 #define same_file(s,t) ((s)->st_ino==(t)->st_ino && (s)->st_dev==(t)->st_dev) 252 #endif 253 254 /* Place into Q a quoted version of A suitable for `popen' or `system', 255 incrementing Q and junking A. 256 Do not increment Q by more than 4 * strlen (A) + 2. */ 257 #ifndef SYSTEM_QUOTE_ARG 258 #define SYSTEM_QUOTE_ARG(q, a) \ 259 { \ 260 *(q)++ = '\''; \ 261 for (; *(a); *(q)++ = *(a)++) \ 262 if (*(a) == '\'') \ 263 { \ 264 *(q)++ = '\''; \ 265 *(q)++ = '\\'; \ 266 *(q)++ = '\''; \ 267 } \ 268 *(q)++ = '\''; \ 269 } 270 #endif 271