src/system.h

   1 /* System-dependent definitions for Bison.
   2
   3    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free
   4    Software Foundation, Inc.
   5
   6    This program 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    This program 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 this program; if not, write to the Free Software Foundation,
  18    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  19
  20 #ifndef BISON_SYSTEM_H
  21 #define BISON_SYSTEM_H
  22
  23 /* flex 2.5.31 gratutiously defines macros like INT8_MIN.  But this
  24    runs afoul of pre-C99 compilers that have <inttypes.h> or
  25    <stdint.h>, which are included below if available.  It also runs
  26    afoul of pre-C99 compilers that define these macros in <limits.h>.  */
  27 #if ! defined __STDC_VERSION__ || __STDC_VERSION__ < 199901
  28 # undef INT8_MIN
  29 # undef INT16_MIN
  30 # undef INT32_MIN
  31 # undef INT8_MAX
  32 # undef INT16_MAX
  33 # undef UINT8_MAX
  34 # undef INT32_MAX
  35 # undef UINT16_MAX
  36 # undef UINT32_MAX
  37 #endif
  38
  39 #include <limits.h>
  40 #include <stddef.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43
  44 #if HAVE_SYS_TYPES_H
  45 # include <sys/types.h>
  46 #endif
  47
  48 #if HAVE_UNISTD_H
  49 # include <unistd.h>
  50 #endif
  51
  52 #if HAVE_INTTYPES_H
  53 # include <inttypes.h>
  54 #endif
  55
  56 #include <stdint.h>
  57
  58 #ifndef UINTPTR_MAX
  59 /* This isn't perfect, but it's good enough for Bison, which needs
  60    only to hash pointers.  */
  61 typedef size_t uintptr_t;
  62 #endif
  63
  64
  65 /*---------.
  66 | Gnulib.  |
  67 `---------*/
  68
  69 #include <stpcpy.h>
  70 #include <unlocked-io.h>
  71 #include <verify.h>
  72 #include <xalloc.h>
  73
  74
  75 /*-----------------.
  76 | GCC extensions.  |
  77 `-----------------*/
  78
  79 /* Use this to suppress gcc's `...may be used before initialized'
  80    warnings.  */
  81 #ifdef lint
  82 # define IF_LINT(Code) Code
  83 #else
  84 # define IF_LINT(Code) /* empty */
  85 #endif
  86
  87 #ifndef __attribute__
  88 /* This feature is available in gcc versions 2.5 and later.  */
  89 # if (! defined __GNUC__ || __GNUC__ < 2 \
  90       || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__)
  91 #  define __attribute__(Spec) /* empty */
  92 # endif
  93 #endif
  94
  95 /* The __-protected variants of `format' and `printf' attributes
  96    are accepted by gcc versions 2.6.4 (effectively 2.7) and later.  */
  97 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
  98 # define __format__ format
  99 # define __printf__ printf
 100 #endif
 101
 102 #ifndef ATTRIBUTE_NORETURN
 103 # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
 104 #endif
 105
 106 #ifndef ATTRIBUTE_UNUSED
 107 # define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
 108 #endif
 109
 110 #define FUNCTION_PRINT() fprintf (stderr, "%s: ", __func__)
 111
 112 /*------.
 113 | NLS.  |
 114 `------*/
 115
 116 #include <locale.h>
 117
 118 #include <gettext.h>
 119 #define _(Msgid)  gettext (Msgid)
 120 #define N_(Msgid) (Msgid)
 121
 122
 123 /*-------------------------------.
 124 | Fix broken compilation flags.  |
 125 `-------------------------------*/
 126
 127 #ifndef LOCALEDIR
 128 # define LOCALEDIR "/usr/local/share/locale"
 129 #endif
 130
 131
 132 /*-----------.
 133 | Booleans.  |
 134 `-----------*/
 135
 136 #include <stdbool.h>
 137
 138
 139
 140 /*-------------.
 141 | Assertions.  |
 142 `-------------*/
 143
 144 /* <assert.h>'s assertions are too heavyweight, and can be disabled
 145    too easily, so use aver rather than assert.  */
 146 static inline void
 147 aver (bool assertion)
 148 {
 149   if (! assertion)
 150     abort ();
 151 }
 152
 153
 154 /*-----------.
 155 | Obstacks.  |
 156 `-----------*/
 157
 158 #define obstack_chunk_alloc xmalloc
 159 #define obstack_chunk_free  free
 160 #include <obstack.h>
 161
 162 #define obstack_sgrow(Obs, Str) \
 163   obstack_grow (Obs, Str, strlen (Str))
 164
 165 #define obstack_fgrow1(Obs, Format, Arg1)       \
 166 do {                                            \
 167   char buf[4096];                               \
 168   sprintf (buf, Format, Arg1);                  \
 169   obstack_grow (Obs, buf, strlen (buf));        \
 170 } while (0)
 171
 172 #define obstack_fgrow2(Obs, Format, Arg1, Arg2) \
 173 do {                                            \
 174   char buf[4096];                               \
 175   sprintf (buf, Format, Arg1, Arg2);            \
 176   obstack_grow (Obs, buf, strlen (buf));        \
 177 } while (0)
 178
 179 #define obstack_fgrow3(Obs, Format, Arg1, Arg2, Arg3)   \
 180 do {                                                    \
 181   char buf[4096];                                       \
 182   sprintf (buf, Format, Arg1, Arg2, Arg3);              \
 183   obstack_grow (Obs, buf, strlen (buf));                \
 184 } while (0)
 185
 186 #define obstack_fgrow4(Obs, Format, Arg1, Arg2, Arg3, Arg4)     \
 187 do {                                                            \
 188   char buf[4096];                                               \
 189   sprintf (buf, Format, Arg1, Arg2, Arg3, Arg4);                \
 190   obstack_grow (Obs, buf, strlen (buf));                        \
 191 } while (0)
 192
 193
 194
 195 /*-----------------------------------------.
 196 | Extensions to use for the output files.  |
 197 `-----------------------------------------*/
 198
 199 #ifndef OUTPUT_EXT
 200 # define OUTPUT_EXT ".output"
 201 #endif
 202
 203 #ifndef TAB_EXT
 204 # define TAB_EXT ".tab"
 205 #endif
 206
 207 #ifndef DEFAULT_TMPDIR
 208 # define DEFAULT_TMPDIR "/tmp"
 209 #endif
 210
 211
 212
 213 /*---------------------.
 214 | Free a linked list.  |
 215 `---------------------*/
 216
 217 #define LIST_FREE(Type, List)                   \
 218 do {                                            \
 219   Type *_node, *_next;                          \
 220   for (_node = List; _node; _node = _next)      \
 221     {                                           \
 222       _next = _node->next;                      \
 223       free (_node);                             \
 224     }                                           \
 225 } while (0)
 226
 227
 228 /*---------------------------------------------.
 229 | Debugging memory allocation (must be last).  |
 230 `---------------------------------------------*/
 231
 232 # if WITH_DMALLOC
 233 #  define DMALLOC_FUNC_CHECK
 234 #  include <dmalloc.h>
 235 # endif /* WITH_DMALLOC */
 236
 237 #endif  /* ! BISON_SYSTEM_H */