gcc/system.h

   1 /* system.h - Get common system includes and various definitions and
   2    declarations based on autoconf macros.
   3    Copyright (C) 1998 Free Software Foundation, Inc.
   4
   5  */
   6
   7 #ifndef __GCC_SYSTEM_H__
   8 #define __GCC_SYSTEM_H__
   9
  10 /* We must include stdarg.h/varargs.h before stdio.h. */
  11 #ifdef __STDC__
  12 #include <stdarg.h>
  13 #else
  14 #include <varargs.h>
  15 #endif
  16
  17 #include <stdio.h>
  18
  19 /* Define a generic NULL if one hasn't already been defined.  */
  20 #ifndef NULL
  21 #define NULL 0
  22 #endif
  23
  24 #include <ctype.h>
  25
  26 /* Jim Meyering writes:
  27
  28    "... Some ctype macros are valid only for character codes that
  29    isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
  30    using /bin/cc or gcc but without giving an ansi option).  So, all
  31    ctype uses should be through macros like ISPRINT...  If
  32    STDC_HEADERS is defined, then autoconf has verified that the ctype
  33    macros don't need to be guarded with references to isascii. ...
  34    Defining isascii to 1 should let any compiler worth its salt
  35    eliminate the && through constant folding."
  36
  37    Bruno Haible adds:
  38
  39    "... Furthermore, isupper(c) etc. have an undefined result if c is
  40    outside the range -1 <= c <= 255. One is tempted to write isupper(c)
  41    with c being of type `char', but this is wrong if c is an 8-bit
  42    character >= 128 which gets sign-extended to a negative value.
  43    The macro ISUPPER protects against this as well."  */
  44
  45 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
  46 # define IN_CTYPE_DOMAIN(c) 1
  47 #else
  48 # define IN_CTYPE_DOMAIN(c) isascii(c)
  49 #endif
  50
  51 #ifdef isblank
  52 # define ISBLANK(c) (IN_CTYPE_DOMAIN (c) && isblank (c))
  53 #else
  54 # define ISBLANK(c) ((c) == ' ' || (c) == '\t')
  55 #endif
  56 #ifdef isgraph
  57 # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isgraph (c))
  58 #else
  59 # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isprint (c) && !isspace (c))
  60 #endif
  61
  62 #define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
  63 #define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum (c))
  64 #define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
  65 #define ISCNTRL(c) (IN_CTYPE_DOMAIN (c) && iscntrl (c))
  66 #define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (c))
  67 #define ISPUNCT(c) (IN_CTYPE_DOMAIN (c) && ispunct (c))
  68 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
  69 #define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c))
  70 #define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit (c))
  71 #define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))
  72
  73 /* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
  74    - Its arg may be any int or unsigned int; it need not be an unsigned char.
  75    - It's guaranteed to evaluate its argument exactly once.
  76    - It's typically faster.
  77    Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
  78    only '0' through '9' are digits.  Prefer ISDIGIT to ISDIGIT_LOCALE unless
  79    it's important to use the locale's definition of `digit' even when the
  80    host does not conform to Posix.  */
  81 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
  82
  83
  84 #include <sys/types.h>
  85 #include <errno.h>
  86
  87 #ifndef errno
  88 extern int errno;
  89 #endif
  90
  91 #ifdef STRING_WITH_STRINGS
  92 # include <string.h>
  93 # include <strings.h>
  94 #else
  95 # ifdef HAVE_STRING_H
  96 #  include <string.h>
  97 # else
  98 #  ifdef HAVE_STRINGS_H
  99 #   include <strings.h>
 100 #  endif
 101 # endif
 102 #endif
 103
 104 #ifdef HAVE_STDLIB_H
 105 # include <stdlib.h>
 106 #endif
 107
 108 #ifdef HAVE_UNISTD_H
 109 # include <unistd.h>
 110 #endif
 111
 112 #ifdef HAVE_SYS_PARAM_H
 113 # include <sys/param.h>
 114 #endif
 115
 116 #if HAVE_LIMITS_H
 117 # include <limits.h>
 118 #endif
 119
 120 #ifdef TIME_WITH_SYS_TIME
 121 # include <sys/time.h>
 122 # include <time.h>
 123 #else
 124 # if HAVE_SYS_TIME_H
 125 #  include <sys/time.h>
 126 # else
 127 #  ifdef HAVE_TIME_H
 128 #   include <time.h>
 129 #  endif
 130 # endif
 131 #endif
 132
 133 #ifdef HAVE_FCNTL_H
 134 # include <fcntl.h>
 135 #else
 136 # ifdef HAVE_SYS_FILE_H
 137 #  include <sys/file.h>
 138 # endif
 139 #endif
 140
 141 #ifndef SEEK_SET
 142 # define SEEK_SET 0
 143 # define SEEK_CUR 1
 144 # define SEEK_END 2
 145 #endif
 146 #ifndef F_OK
 147 # define F_OK 0
 148 # define X_OK 1
 149 # define W_OK 2
 150 # define R_OK 4
 151 #endif
 152 #ifndef O_RDONLY
 153 # define O_RDONLY 0
 154 #endif
 155 #ifndef O_WRONLY
 156 # define O_WRONLY 1
 157 #endif
 158
 159
 160
 161 #ifndef bcopy
 162 # ifdef HAVE_BCOPY
 163 #  ifdef NEED_DECLARATION_BCOPY
 164 extern void bcopy ();
 165 #  endif
 166 # else /* ! HAVE_BCOPY */
 167 #  define bcopy(src,dst,len) memcpy ((dst),(src),(len))
 168 # endif
 169 #endif
 170
 171 #ifndef bcmp
 172 # ifdef HAVE_BCMP
 173 #  ifdef NEED_DECLARATION_BCMP
 174 extern int bcmp ();
 175 #  endif
 176 # else /* ! HAVE_BCMP */
 177 #  define bcmp(left,right,len) memcmp ((left),(right),(len))
 178 # endif
 179 #endif
 180
 181 #ifndef bzero
 182 # ifdef HAVE_BZERO
 183 #  ifdef NEED_DECLARATION_BZERO
 184 extern void bzero ();
 185 #  endif
 186 # else /* ! HAVE_BZERO */
 187 #  define bzero(dst,len) memset ((dst),0,(len))
 188 # endif
 189 #endif
 190
 191 #ifndef index
 192 # ifdef HAVE_INDEX
 193 #  ifdef NEED_DECLARATION_INDEX
 194 extern char *index ();
 195 #  endif
 196 # else /* ! HAVE_INDEX */
 197 #  define index strchr
 198 # endif
 199 #endif
 200
 201 #ifndef rindex
 202 # ifdef HAVE_RINDEX
 203 #  ifdef NEED_DECLARATION_RINDEX
 204 extern char *rindex ();
 205 #  endif
 206 # else /* ! HAVE_RINDEX */
 207 #  define rindex strrchr
 208 # endif
 209 #endif
 210
 211 #ifdef NEED_DECLARATION_ATOF
 212 extern double atof ();
 213 #endif
 214
 215 #ifdef NEED_DECLARATION_ATOL
 216 extern long atol();
 217 #endif
 218
 219 #ifdef NEED_DECLARATION_FREE
 220 extern void free ();
 221 #endif
 222
 223 #ifdef NEED_DECLARATION_GETCWD
 224 extern char *getcwd ();
 225 #endif
 226
 227 #ifdef NEED_DECLARATION_GETENV
 228 extern char *getenv ();
 229 #endif
 230
 231 #ifdef NEED_DECLARATION_GETWD
 232 extern char *getwd ();
 233 #endif
 234
 235 #ifdef NEED_DECLARATION_SBRK
 236 extern char *sbrk ();
 237 #endif
 238
 239 #ifdef HAVE_STRERROR
 240 # ifdef NEED_DECLARATION_STRERROR
 241 #  ifndef strerror
 242 extern char *strerror ();
 243 #  endif
 244 # endif
 245 #else /* ! HAVE_STRERROR */
 246 extern int sys_nerr;
 247 extern char *sys_errlist[];
 248 #endif /* HAVE_STRERROR */
 249
 250 #ifdef HAVE_STRSIGNAL
 251 # ifdef NEED_DECLARATION_STRSIGNAL
 252 #  ifndef strsignal
 253 extern char * strsignal ();
 254 #  endif
 255 # endif
 256 #else /* ! HAVE_STRSIGNAL */
 257 # ifndef SYS_SIGLIST_DECLARED
 258 #  ifndef NO_SYS_SIGLIST
 259 extern char * sys_siglist[];
 260 #  endif
 261 # endif
 262 #endif /* HAVE_STRSIGNAL */
 263
 264 #ifdef HAVE_GETRLIMIT
 265 # ifdef NEED_DECLARATION_GETRLIMIT
 266 #  ifndef getrlimit
 267 extern int getrlimit ();
 268 #  endif
 269 # endif
 270 #endif
 271
 272 #ifdef HAVE_SETRLIMIT
 273 # ifdef NEED_DECLARATION_SETRLIMIT
 274 #  ifndef setrlimit
 275 extern int setrlimit ();
 276 #  endif
 277 # endif
 278 #endif
 279
 280 /* HAVE_VOLATILE only refers to the stage1 compiler.  We also check
 281    __STDC__ and assume gcc sets it and has volatile in stage >=2. */
 282 #if !defined(HAVE_VOLATILE) && !defined(__STDC__) && !defined(volatile)
 283 #define volatile
 284 #endif
 285
 286 /* Redefine abort to report an internal error w/o coredump, and reporting the
 287    location of the error in the source file.  */
 288 #ifndef abort
 289 #ifndef __STDC__
 290 #ifndef __GNUC__
 291 #ifndef USE_SYSTEM_ABORT
 292 #define USE_SYSTEM_ABORT
 293 #endif /* !USE_SYSTEM_ABORT */
 294 #endif /* !__GNUC__ */
 295 #endif /* !__STDC__ */
 296
 297 #ifdef USE_SYSTEM_ABORT
 298 # ifdef NEED_DECLARATION_ABORT
 299 extern void abort ();
 300 # endif
 301 #else
 302 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
 303 #define abort()                                                         \
 304 (fprintf (stderr,                                                       \
 305           "%s:%d: Internal compiler error\n", __FILE__, __LINE__),      \
 306  exit (FATAL_EXIT_CODE))
 307
 308 #else
 309 #define abort()                                                         \
 310 (fprintf (stderr,                                                       \
 311           "%s:%d: Internal compiler error in function %s\n",            \
 312           __FILE__, __LINE__, __PRETTY_FUNCTION__),                     \
 313  exit (FATAL_EXIT_CODE))
 314
 315 #endif /* recent gcc */
 316 #endif /* USE_SYSTEM_ABORT */
 317 #endif /* !abort */
 318
 319
 320 /* Define a STRINGIFY macro that's right for ANSI or traditional C.
 321    HAVE_CPP_STRINGIFY only refers to the stage1 compiler.  Assume that
 322    (non-traditional) gcc used in stage2 or later has this feature.
 323
 324    Note: if the argument passed to STRINGIFY is itself a macro, eg
 325    #define foo bar, STRINGIFY(foo) will produce "foo", not "bar".
 326    Although the __STDC__ case could be made to expand this via a layer
 327    of indirection, the traditional C case can not do so.  Therefore
 328    this behavior is not supported. */
 329 #ifndef STRINGIFY
 330 # if defined(HAVE_CPP_STRINGIFY) || (defined(__GNUC__) && defined(__STDC__))
 331 #  define STRINGIFY(STRING) #STRING
 332 # else
 333 #  define STRINGIFY(STRING) "STRING"
 334 # endif
 335 #endif /* ! STRINGIFY */
 336
 337
 338 /* These macros are here in preparation for the use of gettext in egcs.  */
 339 #define _(String) String
 340 #define N_(String) String
 341
 342 #endif /* __GCC_SYSTEM_H__ */