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1 /* System dependent declarations.

4 This file is part of GNU DIFF.

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.

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.

16 */

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>

27 #include <sys/types.h>

28 #include <sys/stat.h>

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

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

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 */

78 #if HAVE_UNISTD_H

79 #include <unistd.h>

80 #endif

82 #ifdef HAVE_IO_H

83 # include <io.h>

84 #endif

86 #ifdef HAVE_FCNTL_H

87 # include <fcntl.h>

88 #else

89 # include <sys/file.h>

90 #endif

92 #ifndef SEEK_SET

93 #define SEEK_SET 0

94 #endif

95 #ifndef SEEK_CUR

96 #define SEEK_CUR 1

97 #endif

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 \f

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