src/system.h

   1 /* System-dependent definitions for Bison.
   2
   3    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 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 #include <unistd.h>
  49 #include <inttypes.h>
  50
  51 #ifndef UINTPTR_MAX
  52 /* This isn't perfect, but it's good enough for Bison, which needs
  53    only to hash pointers.  */
  54 typedef size_t uintptr_t;
  55 #endif
  56
  57
  58 /*---------.
  59 | Gnulib.  |
  60 `---------*/
  61
  62 #include <unlocked-io.h>
  63 #include <verify.h>
  64 #include <xalloc.h>
  65
  66
  67 /*-----------------.
  68 | GCC extensions.  |
  69 `-----------------*/
  70
  71 /* Use this to suppress gcc's `...may be used before initialized'
  72    warnings.  */
  73 #ifdef lint
  74 # define IF_LINT(Code) Code
  75 #else
  76 # define IF_LINT(Code) /* empty */
  77 #endif
  78
  79 #ifndef __attribute__
  80 /* This feature is available in gcc versions 2.5 and later.  */
  81 # if (! defined __GNUC__ || __GNUC__ < 2 \
  82       || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__)
  83 #  define __attribute__(Spec) /* empty */
  84 # endif
  85 #endif
  86
  87 /* The __-protected variants of `format' and `printf' attributes
  88    are accepted by gcc versions 2.6.4 (effectively 2.7) and later.  */
  89 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
  90 # define __format__ format
  91 # define __printf__ printf
  92 #endif
  93
  94 #ifndef ATTRIBUTE_NORETURN
  95 # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
  96 #endif
  97
  98 #ifndef ATTRIBUTE_UNUSED
  99 # define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
 100 #endif
 101
 102 #define FUNCTION_PRINT() fprintf (stderr, "%s: ", __func__)
 103
 104 /*------.
 105 | NLS.  |
 106 `------*/
 107
 108 #include <locale.h>
 109
 110 #include <gettext.h>
 111 #define _(Msgid)  gettext (Msgid)
 112 #define N_(Msgid) (Msgid)
 113
 114
 115 /*-----------.
 116 | Booleans.  |
 117 `-----------*/
 118
 119 #include <stdbool.h>
 120
 121
 122
 123 /*-------------.
 124 | Assertions.  |
 125 `-------------*/
 126
 127 /* <assert.h>'s assertions are too heavyweight, and can be disabled
 128    too easily, so use aver rather than assert.  */
 129 static inline void
 130 aver (bool assertion)
 131 {
 132   if (! assertion)
 133     abort ();
 134 }
 135
 136
 137 /*-----------.
 138 | Obstacks.  |
 139 `-----------*/
 140
 141 #define obstack_chunk_alloc xmalloc
 142 #define obstack_chunk_free  free
 143 #include <obstack.h>
 144
 145 #define obstack_sgrow(Obs, Str) \
 146   obstack_grow (Obs, Str, strlen (Str))
 147
 148 #define obstack_fgrow1(Obs, Format, Arg1)       \
 149 do {                                            \
 150   char buf[4096];                               \
 151   sprintf (buf, Format, Arg1);                  \
 152   obstack_grow (Obs, buf, strlen (buf));        \
 153 } while (0)
 154
 155 #define obstack_fgrow2(Obs, Format, Arg1, Arg2) \
 156 do {                                            \
 157   char buf[4096];                               \
 158   sprintf (buf, Format, Arg1, Arg2);            \
 159   obstack_grow (Obs, buf, strlen (buf));        \
 160 } while (0)
 161
 162 #define obstack_fgrow3(Obs, Format, Arg1, Arg2, Arg3)   \
 163 do {                                                    \
 164   char buf[4096];                                       \
 165   sprintf (buf, Format, Arg1, Arg2, Arg3);              \
 166   obstack_grow (Obs, buf, strlen (buf));                \
 167 } while (0)
 168
 169 #define obstack_fgrow4(Obs, Format, Arg1, Arg2, Arg3, Arg4)     \
 170 do {                                                            \
 171   char buf[4096];                                               \
 172   sprintf (buf, Format, Arg1, Arg2, Arg3, Arg4);                \
 173   obstack_grow (Obs, buf, strlen (buf));                        \
 174 } while (0)
 175
 176
 177
 178 /*-----------------------------------------.
 179 | Extensions to use for the output files.  |
 180 `-----------------------------------------*/
 181
 182 #ifndef OUTPUT_EXT
 183 # define OUTPUT_EXT ".output"
 184 #endif
 185
 186 #ifndef TAB_EXT
 187 # define TAB_EXT ".tab"
 188 #endif
 189
 190 #ifndef DEFAULT_TMPDIR
 191 # define DEFAULT_TMPDIR "/tmp"
 192 #endif
 193
 194
 195
 196 /*---------------------.
 197 | Free a linked list.  |
 198 `---------------------*/
 199
 200 #define LIST_FREE(Type, List)                   \
 201 do {                                            \
 202   Type *_node, *_next;                          \
 203   for (_node = List; _node; _node = _next)      \
 204     {                                           \
 205       _next = _node->next;                      \
 206       free (_node);                             \
 207     }                                           \
 208 } while (0)
 209
 210
 211 /*---------------------------------------------.
 212 | Debugging memory allocation (must be last).  |
 213 `---------------------------------------------*/
 214
 215 # if WITH_DMALLOC
 216 #  define DMALLOC_FUNC_CHECK
 217 #  include <dmalloc.h>
 218 # endif /* WITH_DMALLOC */
 219
 220 #endif  /* ! BISON_SYSTEM_H */