1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
/* System-dependent definitions for Bison.
Copyright (C) 2000-2007, 2009-2013 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef BISON_SYSTEM_H
# define BISON_SYSTEM_H
/* flex 2.5.31 gratutiously defines macros like INT8_MIN. But this
runs afoul of pre-C99 compilers that have <inttypes.h> or
<stdint.h>, which are included below if available. It also runs
afoul of pre-C99 compilers that define these macros in <limits.h>. */
# if ! defined __STDC_VERSION__ || __STDC_VERSION__ < 199901
# undef INT8_MIN
# undef INT16_MIN
# undef INT32_MIN
# undef INT8_MAX
# undef INT16_MAX
# undef UINT8_MAX
# undef INT32_MAX
# undef UINT16_MAX
# undef UINT32_MAX
# endif
# include <limits.h>
# include <stddef.h>
# include <stdlib.h>
# include <string.h>
# define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
# define STREQ(L, R) (strcmp(L, R) == 0)
# define STRNEQ(L, R) (!STREQ(L, R))
/* Just like strncmp, but the second argument must be a literal string
and you don't specify the length. */
# define STRNCMP_LIT(S, Literal) \
strncmp (S, "" Literal "", sizeof (Literal) - 1)
/* Whether Literal is a prefix of S. */
# define STRPREFIX_LIT(Literal, S) \
(STRNCMP_LIT (S, Literal) == 0)
# include <unistd.h>
#if (defined _MSC_VER) && (_MSC_VER < 1800)
#else
# include <inttypes.h>
#endif
# ifndef UINTPTR_MAX
/* This isn't perfect, but it's good enough for Bison, which needs
only to hash pointers. */
typedef size_t uintptr_t;
# endif
/* Version mismatch. */
# define EX_MISMATCH 63
/*---------.
| Gnulib. |
`---------*/
# include <unlocked-io.h>
# include <verify.h>
# include <xalloc.h>
/*-----------------.
| GCC extensions. |
`-----------------*/
/* Use PACIFY_CC to indicate that Code is unimportant to the logic of Bison
but that it is necessary for suppressing compiler warnings. For example,
Code might be a variable initializer that's always overwritten before the
variable is used.
PACIFY_CC is intended to be useful only as a comment as it does not alter
Code. It is tempting to redefine PACIFY_CC so that it will suppress Code
when configuring without --enable-gcc-warnings. However, that would mean
that, for maintainers, Bison would compile with potentially less warnings
and safer logic than it would for users. Due to the overhead of M4,
suppressing Code is unlikely to offer any significant improvement in
Bison's performance anyway. */
# define PACIFY_CC(Code) Code
# ifndef __attribute__
/* This feature is available in gcc versions 2.5 and later. */
# if (! defined __GNUC__ || __GNUC__ < 2 \
|| (__GNUC__ == 2 && __GNUC_MINOR__ < 5))
# define __attribute__(Spec) /* empty */
# endif
# endif
/* The __-protected variants of 'format' and 'printf' attributes
are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
# define __format__ format
# define __printf__ printf
# endif
# ifndef ATTRIBUTE_NORETURN
# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
# endif
# ifndef ATTRIBUTE_UNUSED
# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
# endif
/*------.
| NLS. |
`------*/
# include <locale.h>
# include <gettext.h>
# define _(Msgid) gettext (Msgid)
# define N_(Msgid) (Msgid)
/*-----------.
| Booleans. |
`-----------*/
# include <stdbool.h>
/*-------------.
| Assertions. |
`-------------*/
/* In the past, Bison defined aver to simply invoke abort in the case of
a failed assertion. The rationale was that <assert.h>'s assertions
were too heavyweight and could be disabled too easily. See
discussions at
<http://lists.gnu.org/archive/html/bison-patches/2006-01/msg00080.html>
<http://lists.gnu.org/archive/html/bison-patches/2006-09/msg00111.html>.
However, normal assert output can be helpful during development and
in bug reports from users. Moreover, it's not clear now that
<assert.h>'s assertions are significantly heavyweight. Finally, if
users want to experiment with disabling assertions, it's debatable
whether it's our responsibility to stop them. See discussion
starting at
<http://lists.gnu.org/archive/html/bison-patches/2009-09/msg00013.html>.
For now, we use assert but we call it aver throughout Bison in case
we later wish to try another scheme.
*/
# include <assert.h>
# define aver assert
/*-----------.
| Obstacks. |
`-----------*/
# define obstack_chunk_alloc xmalloc
# define obstack_chunk_free free
# include <obstack.h>
/* String-grow: append Str to Obs. */
# define obstack_sgrow(Obs, Str) \
obstack_grow (Obs, Str, strlen (Str))
/* Output Str escaped for our postprocessing (i.e., escape M4 special
characters).
For instance "[foo]" -> "@{foo@}", "$$" -> "$][$][". */
# define obstack_escape(Obs, Str) \
do { \
char const *p__; \
for (p__ = Str; *p__; p__++) \
switch (*p__) \
{ \
case '$': obstack_sgrow (Obs, "$]["); break; \
case '@': obstack_sgrow (Obs, "@@" ); break; \
case '[': obstack_sgrow (Obs, "@{" ); break; \
case ']': obstack_sgrow (Obs, "@}" ); break; \
default: obstack_1grow (Obs, *p__ ); break; \
} \
} while (0)
/* Output Str both quoted for M4 (i.e., embed in [[...]]), and escaped
for our postprocessing (i.e., escape M4 special characters). If
Str is empty (or NULL), output "[]" instead of "[[]]" as it make M4
programming easier (m4_ifval can be used).
For instance "[foo]" -> "[[@{foo@}]]", "$$" -> "[[$][$][]]". */
# define obstack_quote(Obs, Str) \
do { \
char const* obstack_quote_p = Str; \
if (obstack_quote_p && obstack_quote_p[0]) \
{ \
obstack_sgrow (Obs, "[["); \
obstack_escape (Obs, obstack_quote_p); \
obstack_sgrow (Obs, "]]"); \
} \
else \
obstack_sgrow (Obs, "[]"); \
} while (0)
/* Append the ending 0, finish Obs, and return the string. */
# define obstack_finish0(Obs) \
(obstack_1grow (Obs, '\0'), (char *) obstack_finish (Obs))
/*-----------------------------------------.
| Extensions to use for the output files. |
`-----------------------------------------*/
# ifndef OUTPUT_EXT
# define OUTPUT_EXT ".output"
# endif
# ifndef TAB_EXT
# define TAB_EXT ".tab"
# endif
/*---------------------.
| Free a linked list. |
`---------------------*/
# define LIST_FREE(Type, List) \
do { \
Type *_node, *_next; \
for (_node = List; _node; _node = _next) \
{ \
_next = _node->next; \
free (_node); \
} \
} while (0)
/*---------------------------------------------.
| Debugging memory allocation (must be last). |
`---------------------------------------------*/
# if WITH_DMALLOC
# define DMALLOC_FUNC_CHECK
# include <dmalloc.h>
# endif /* WITH_DMALLOC */
#endif /* ! BISON_SYSTEM_H */
|
