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 #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 <stpcpy.h>
  63 #include <unlocked-io.h>
  64 #include <verify.h>
  65 #include <xalloc.h>
  66
  67
  68 /*-----------------.
  69 | GCC extensions.  |
  70 `-----------------*/
  71
  72 /* Use this to suppress gcc's `...may be used before initialized'
  73    warnings.  */
  74 #ifdef lint
  75 # define IF_LINT(Code) Code
  76 #else
  77 # define IF_LINT(Code) /* empty */
  78 #endif
  79
  80 #ifndef __attribute__
  81 /* This feature is available in gcc versions 2.5 and later.  */
  82 # if (! defined __GNUC__ || __GNUC__ < 2 \
  83       || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__)
  84 #  define __attribute__(Spec) /* empty */
  85 # endif
  86 #endif
  87
  88 /* The __-protected variants of `format' and `printf' attributes
  89    are accepted by gcc versions 2.6.4 (effectively 2.7) and later.  */
  90 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
  91 # define __format__ format
  92 # define __printf__ printf
  93 #endif
  94
  95 #ifndef ATTRIBUTE_NORETURN
  96 # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
  97 #endif
  98
  99 #ifndef ATTRIBUTE_UNUSED
 100 # define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
 101 #endif
 102
 103 #define FUNCTION_PRINT() fprintf (stderr, "%s: ", __func__)
 104
 105 /*------.
 106 | NLS.  |
 107 `------*/
 108
 109 #include <locale.h>
 110
 111 #include <gettext.h>
 112 #define _(Msgid)  gettext (Msgid)
 113 #define N_(Msgid) (Msgid)
 114
 115
 116 /*-----------.
 117 | Booleans.  |
 118 `-----------*/
 119
 120 #include <stdbool.h>
 121
 122
 123
 124 /*-------------.
 125 | Assertions.  |
 126 `-------------*/
 127
 128 /* <assert.h>'s assertions are too heavyweight, and can be disabled
 129    too easily, so use aver rather than assert.  */
 130 static inline void
 131 aver (bool assertion)
 132 {
 133   if (! assertion)
 134     abort ();
 135 }
 136
 137
 138 /*-----------.
 139 | Obstacks.  |
 140 `-----------*/
 141
 142 #define obstack_chunk_alloc xmalloc
 143 #define obstack_chunk_free  free
 144 #include <obstack.h>
 145
 146 #define obstack_sgrow(Obs, Str) \
 147   obstack_grow (Obs, Str, strlen (Str))
 148
 149 #define obstack_fgrow1(Obs, Format, Arg1)       \
 150 do {                                            \
 151   char buf[4096];                               \
 152   sprintf (buf, Format, Arg1);                  \
 153   obstack_grow (Obs, buf, strlen (buf));        \
 154 } while (0)
 155
 156 #define obstack_fgrow2(Obs, Format, Arg1, Arg2) \
 157 do {                                            \
 158   char buf[4096];                               \
 159   sprintf (buf, Format, Arg1, Arg2);            \
 160   obstack_grow (Obs, buf, strlen (buf));        \
 161 } while (0)
 162
 163 #define obstack_fgrow3(Obs, Format, Arg1, Arg2, Arg3)   \
 164 do {                                                    \
 165   char buf[4096];                                       \
 166   sprintf (buf, Format, Arg1, Arg2, Arg3);              \
 167   obstack_grow (Obs, buf, strlen (buf));                \
 168 } while (0)
 169
 170 #define obstack_fgrow4(Obs, Format, Arg1, Arg2, Arg3, Arg4)     \
 171 do {                                                            \
 172   char buf[4096];                                               \
 173   sprintf (buf, Format, Arg1, Arg2, Arg3, Arg4);                \
 174   obstack_grow (Obs, buf, strlen (buf));                        \
 175 } while (0)
 176
 177
 178
 179 /*-----------------------------------------.
 180 | Extensions to use for the output files.  |
 181 `-----------------------------------------*/
 182
 183 #ifndef OUTPUT_EXT
 184 # define OUTPUT_EXT ".output"
 185 #endif
 186
 187 #ifndef TAB_EXT
 188 # define TAB_EXT ".tab"
 189 #endif
 190
 191 #ifndef DEFAULT_TMPDIR
 192 # define DEFAULT_TMPDIR "/tmp"
 193 #endif
 194
 195
 196
 197 /*---------------------.
 198 | Free a linked list.  |
 199 `---------------------*/
 200
 201 #define LIST_FREE(Type, List)                   \
 202 do {                                            \
 203   Type *_node, *_next;                          \
 204   for (_node = List; _node; _node = _next)      \
 205     {                                           \
 206       _next = _node->next;                      \
 207       free (_node);                             \
 208     }                                           \
 209 } while (0)
 210
 211
 212 /*---------------------------------------------.
 213 | Debugging memory allocation (must be last).  |
 214 `---------------------------------------------*/
 215
 216 # if WITH_DMALLOC
 217 #  define DMALLOC_FUNC_CHECK
 218 #  include <dmalloc.h>
 219 # endif /* WITH_DMALLOC */
 220
 221 #endif  /* ! BISON_SYSTEM_H */