Home | History | Annotate | Line # | Download | only in diff 
      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
    247    that are meant to be overridden by hand in config.h as needed.  */
    248 
    249 #ifndef filename_cmp
    250 #define filename_cmp(a, b) strcmp (a, b)
    251 #endif
    252 
    253 #ifndef filename_lastdirchar
    254 #define filename_lastdirchar(filename) strrchr (filename, '/')
    255 #endif
    256 
    257 #ifndef HAVE_FORK
    258 #define HAVE_FORK 1
    259 #endif
    260 
    261 #ifndef HAVE_SETMODE
    262 #define HAVE_SETMODE 0
    263 #endif
    264 
    265 #ifndef initialize_main
    266 #define initialize_main(argcp, argvp)
    267 #endif
    268 
    269 /* Do struct stat *S, *T describe the same file?  Answer -1 if unknown.  */
    270 #ifndef same_file
    271 #define same_file(s,t) ((s)->st_ino==(t)->st_ino && (s)->st_dev==(t)->st_dev)
    272 #endif
    273 
    274 /* Place into Q a quoted version of A suitable for `popen' or `system',
    275    incrementing Q and junking A.
    276    Do not increment Q by more than 4 * strlen (A) + 2.  */
    277 #ifndef SYSTEM_QUOTE_ARG
    278 #define SYSTEM_QUOTE_ARG(q, a) \
    279   { \
    280     *(q)++ = '\''; \
    281     for (;  *(a);  *(q)++ = *(a)++) \
    282       if (*(a) == '\'') \
    283 	{ \
    284 	  *(q)++ = '\''; \
    285 	  *(q)++ = '\\'; \
    286 	  *(q)++ = '\''; \
    287 	} \
    288     *(q)++ = '\''; \
    289   }
    290 #endif
    291 
    292 /* these come from CVS's lib/system.h, but I wasn't sure how to include that
    293  * properly or even if I really should
    294  */
    295 #ifndef CVS_OPENDIR
    296 #define CVS_OPENDIR opendir
    297 #endif
    298 #ifndef CVS_READDIR
    299 #define CVS_READDIR readdir
    300 #endif
    301 #ifndef CVS_CLOSEDIR
    302 #define CVS_CLOSEDIR closedir
    303 #endif
    304