src/system.h

   1 /* System-dependent definitions for Bison.
   2
   3    Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef BISON_SYSTEM_H
  20 #define BISON_SYSTEM_H
  21
  22 #if HAVE_CONFIG_H
  23 # include <config.h>
  24 #endif
  25
  26 #include <stddef.h>
  27 #include <stdio.h>
  28
  29 /* Verify a requirement at compile-time (unlike assert, which is runtime).  */
  30 #define verify(name, assertion) struct name {char name[(assertion) ? 1 : -1];}
  31
  32 #if HAVE_SYS_TYPES_H
  33 # include <sys/types.h>
  34 #endif
  35
  36 #if HAVE_STDLIB_H
  37 # include <stdlib.h>
  38 #endif
  39
  40 /* The following test is to work around the gross typo in
  41    systems like Sony NEWS-OS Release 4.0C, whereby EXIT_FAILURE
  42    is defined to 0, not 1.  */
  43 #if !EXIT_FAILURE
  44 # undef EXIT_FAILURE
  45 # define EXIT_FAILURE 1
  46 #endif
  47
  48 #ifndef EXIT_SUCCESS
  49 # define EXIT_SUCCESS 0
  50 #endif
  51
  52 #if HAVE_UNISTD_H
  53 # include <unistd.h>
  54 #endif
  55
  56 #if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
  57 # include <string.h>
  58 /* An ANSI string.h and pre-ANSI memory.h might conflict.  */
  59 # if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H)
  60 #  include <memory.h>
  61 # endif /* not STDC_HEADERS and HAVE_MEMORY_H */
  62 #else /* not STDC_HEADERS and not HAVE_STRING_H */
  63 # include <strings.h>
  64 /* memory.h and strings.h conflict on some systems.  */
  65 #endif /* not STDC_HEADERS and not HAVE_STRING_H */
  66
  67 #include <limits.h>
  68
  69 #if HAVE_UINTPTR_T
  70 # if HAVE_INTTYPES_H
  71 #  include <inttypes.h>
  72 # else
  73 #  if HAVE_STDINT_H
  74 #   include <stdint.h>
  75 #  endif
  76 # endif
  77 #else
  78 /* This isn't perfect, but it's good enough for Bison, which needs
  79    only to hash pointers.  */
  80 typedef size_t uintptr_t;
  81 #endif
  82
  83 #include <xalloc.h>
  84 #define CALLOC(P, N) ((P) = xcalloc (N, sizeof *(P)))
  85 #define MALLOC(P, N) ((P) = xmalloc ((N) * sizeof *(P)))
  86 #define REALLOC(P, N) ((P) = xrealloc (P, (N) * sizeof *(P)))
  87
  88 /* From xstrndup.c.  */
  89 char *xstrndup (const char *s, size_t n);
  90
  91
  92 /*---------------------.
  93 | Missing prototypes.  |
  94 `---------------------*/
  95
  96 #if defined HAVE_DECL_STPCPY && !HAVE_DECL_STPCPY
  97 char *stpcpy (char *dest, const char *src);
  98 #endif
  99
 100 #if defined HAVE_DECL_STRCHR && !HAVE_DECL_STRCHR
 101 char *strchr (const char *s, int c);
 102 #endif
 103
 104 #if defined HAVE_DECL_STRSPN && !HAVE_DECL_STRSPN
 105 size_t strspn (const char *s, const char *accept);
 106 #endif
 107
 108 #if defined HAVE_DECL_STRNLEN && !HAVE_DECL_STRNLEN
 109 size_t strnlen (const char *s, size_t maxlen);
 110 #endif
 111
 112 #if defined HAVE_DECL_MEMCHR && !HAVE_DECL_MEMCHR
 113 void *memchr (const void *s, int c, size_t n);
 114 #endif
 115
 116 #if defined HAVE_DECL_MEMRCHR && !HAVE_DECL_MEMRCHR
 117 void *memrchr (const void *s, int c, size_t n);
 118 #endif
 119
 120
 121
 122 /*-----------------.
 123 | GCC extensions.  |
 124 `-----------------*/
 125
 126 /* Use this to suppress gcc's `...may be used before initialized'
 127    warnings.  */
 128 #ifdef lint
 129 # define IF_LINT(Code) Code
 130 #else
 131 # define IF_LINT(Code) /* empty */
 132 #endif
 133
 134 #ifndef __attribute__
 135 /* This feature is available in gcc versions 2.5 and later.  */
 136 # if !defined (__GNUC__) || __GNUC__ < 2 || \
 137 (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
 138 #  define __attribute__(Spec) /* empty */
 139 # endif
 140 #endif
 141
 142 /* The __-protected variants of `format' and `printf' attributes
 143    are accepted by gcc versions 2.6.4 (effectively 2.7) and later.  */
 144 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
 145 # define __format__ format
 146 # define __printf__ printf
 147 #endif
 148
 149 #ifndef ATTRIBUTE_NORETURN
 150 # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
 151 #endif
 152
 153 #ifndef ATTRIBUTE_UNUSED
 154 # define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
 155 #endif
 156
 157 /*------.
 158 | NLS.  |
 159 `------*/
 160
 161 #if HAVE_LOCALE_H
 162 # include <locale.h>
 163 #endif
 164 #if !HAVE_SETLOCALE
 165 # define setlocale(Category, Locale)
 166 #endif
 167
 168 #include <gettext.h>
 169 #define _(Msgid)  gettext (Msgid)
 170 #define N_(Msgid) (Msgid)
 171
 172
 173 /*-------------------------------.
 174 | Fix broken compilation flags.  |
 175 `-------------------------------*/
 176
 177 #ifndef LOCALEDIR
 178 # define LOCALEDIR "/usr/local/share/locale"
 179 #endif
 180
 181
 182 /*-----------.
 183 | Booleans.  |
 184 `-----------*/
 185
 186 #if HAVE_STDBOOL_H
 187 # include <stdbool.h>
 188 #else
 189 # ifndef __bool_true_false_are_defined
 190 #  if ! HAVE__BOOL
 191 #   ifdef __cplusplus
 192 typedef bool _Bool;
 193 #   else
 194 typedef unsigned char _Bool;
 195 #   endif
 196 #  endif
 197 #  define bool _Bool
 198 #  define false 0
 199 #  define true 1
 200 #  define __bool_true_false_are_defined 1
 201 # endif
 202 #endif
 203
 204
 205 /*-----------.
 206 | Obstacks.  |
 207 `-----------*/
 208
 209 # define obstack_chunk_alloc xmalloc
 210 # define obstack_chunk_free  free
 211 # include <obstack.h>
 212
 213 #define obstack_sgrow(Obs, Str) \
 214   obstack_grow (Obs, Str, strlen (Str))
 215
 216 #define obstack_fgrow1(Obs, Format, Arg1)       \
 217 do {                                            \
 218   char buf[4096];                               \
 219   sprintf (buf, Format, Arg1);                  \
 220   obstack_grow (Obs, buf, strlen (buf));        \
 221 } while (0)
 222
 223 #define obstack_fgrow2(Obs, Format, Arg1, Arg2) \
 224 do {                                            \
 225   char buf[4096];                               \
 226   sprintf (buf, Format, Arg1, Arg2);            \
 227   obstack_grow (Obs, buf, strlen (buf));        \
 228 } while (0)
 229
 230 #define obstack_fgrow3(Obs, Format, Arg1, Arg2, Arg3)   \
 231 do {                                                    \
 232   char buf[4096];                                       \
 233   sprintf (buf, Format, Arg1, Arg2, Arg3);              \
 234   obstack_grow (Obs, buf, strlen (buf));                \
 235 } while (0)
 236
 237 #define obstack_fgrow4(Obs, Format, Arg1, Arg2, Arg3, Arg4)     \
 238 do {                                                            \
 239   char buf[4096];                                               \
 240   sprintf (buf, Format, Arg1, Arg2, Arg3, Arg4);                \
 241   obstack_grow (Obs, buf, strlen (buf));                        \
 242 } while (0)
 243
 244
 245
 246 /*-----------------------------------------.
 247 | Extensions to use for the output files.  |
 248 `-----------------------------------------*/
 249
 250 #ifdef VMS
 251   /* VMS. */
 252 # define TAB_EXT        "_tab"
 253 # define OUTPUT_EXT     ".output"
 254 #else /* ! VMS */
 255 # ifdef MSDOS
 256    /* MS DOS. */
 257 #  define TAB_EXT       "_tab"
 258 #  define OUTPUT_EXT    ".out"
 259 # else /* ! MSDOS */
 260   /* Standard. */
 261 #  define TAB_EXT       ".tab"
 262 #  define OUTPUT_EXT    ".output"
 263 # endif /* ! MSDOS */
 264 #endif /* ! VMS */
 265
 266 #ifndef DEFAULT_TMPDIR
 267 # define DEFAULT_TMPDIR "/tmp"
 268 #endif
 269
 270
 271
 272 /*---------------------.
 273 | Free a linked list.  |
 274 `---------------------*/
 275
 276 #define LIST_FREE(Type, List)                   \
 277 do {                                            \
 278   Type *_node, *_next;                          \
 279   for (_node = List; _node; _node = _next)      \
 280     {                                           \
 281       _next = _node->next;                      \
 282       XFREE (_node);                            \
 283     }                                           \
 284 } while (0)
 285
 286
 287 /*---------------------------------------------.
 288 | Debugging memory allocation (must be last).  |
 289 `---------------------------------------------*/
 290
 291 # if WITH_DMALLOC
 292 #  define DMALLOC_FUNC_CHECK
 293 #  include <dmalloc.h>
 294 # endif /* WITH_DMALLOC */
 295
 296 #endif  /* ! BISON_SYSTEM_H */