]> git.saurik.com Git - bison.git/blob - data/push.c
projects / bison.git / blob
? search:


250105092ba0d35d0e67ba5cfd9c8f5d87263ece
[bison.git] / data / push.c
1 -*- C -*-
2
3 # Yacc compatible skeleton for Bison
4
5 # Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
6 # 2007 Free Software Foundation, Inc.
7
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 2 of the License, or
11 # (at your option) any later version.
12
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
17
18 # You should have received a copy of the GNU General Public License
19 # along with this program; if not, write to the Free Software
20 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 # 02110-1301 USA
22
23 # Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing
24 # tests function as written, don't let BISON_USE_PUSH_FOR_PULL modify Bison's
25 # behavior at all when push parsing is already requested.
26 b4_use_push_for_pull_if([
27 b4_push_if([
28 m4_define([b4_use_push_for_pull_flag], [[0]])
29 b4_define_flag_if([use_push_for_pull])
30 ], [
31 m4_define([b4_push_flag], [[1]])
32 b4_define_flag_if([push])
33 ])])
34
35 m4_include(b4_pkgdatadir/[c.m4])
36 b4_check_percent_code_qualifiers([[requires]], [[provides]], [[top]])
37
38 ## ---------------- ##
39 ## Default values. ##
40 ## ---------------- ##
41
42 # Stack parameters.
43 m4_define_default([b4_stack_depth_max], [10000])
44 m4_define_default([b4_stack_depth_init], [200])
45
46
47 ## ------------------------ ##
48 ## Pure/impure interfaces. ##
49 ## ------------------------ ##
50
51
52 # b4_yacc_pure_if(IF-TRUE, IF-FALSE)
53 # ----------------------------------
54 # Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
55 m4_define([b4_yacc_pure_if],
56 [b4_pure_if([m4_ifset([b4_parse_param],
57 [$1], [$2])],
58 [$2])])
59
60
61 # b4_yyerror_args
62 # ---------------
63 # Arguments passed to yyerror: user args plus yylloc.
64 m4_define([b4_yyerror_args],
65 [b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
66 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
67
68
69 # b4_lex_param
70 # ------------
71 # Accumulate in b4_lex_param all the yylex arguments.
72 # b4_lex_param arrives quoted twice, but we want to keep only one level.
73 m4_define([b4_lex_param],
74 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
75 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
76 m4_ifdef([b4_lex_param], b4_lex_param)))
77
78
79 ## ------------ ##
80 ## Data Types. ##
81 ## ------------ ##
82
83 # b4_int_type(MIN, MAX)
84 # ---------------------
85 # Return the smallest int type able to handle numbers ranging from
86 # MIN to MAX (included). Overwrite the version from c.m4, which
87 # uses only C89 types, so that the user can override the shorter
88 # types, and so that pre-C89 compilers are handled correctly.
89 m4_define([b4_int_type],
90 [m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8],
91 b4_ints_in($@, [-128], [127]), [1], [yytype_int8],
92
93 b4_ints_in($@, [0], [65535]), [1], [yytype_uint16],
94 b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
95
96 m4_eval([0 <= $1]), [1], [unsigned int],
97
98 [int])])
99
100
101 ## ----------------- ##
102 ## Semantic Values. ##
103 ## ----------------- ##
104
105
106 # b4_lhs_value([TYPE])
107 # --------------------
108 # Expansion of $<TYPE>$.
109 m4_define([b4_lhs_value],
110 [(yyval[]m4_ifval([$1], [.$1]))])
111
112
113 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
114 # --------------------------------------
115 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
116 # symbols on RHS.
117 m4_define([b4_rhs_value],
118 [(yyvsp@{($2) - ($1)@}m4_ifval([$3], [.$3]))])
119
120
121
122 ## ----------- ##
123 ## Locations. ##
124 ## ----------- ##
125
126 # b4_lhs_location()
127 # -----------------
128 # Expansion of @$.
129 m4_define([b4_lhs_location],
130 [(yyloc)])
131
132
133 # b4_rhs_location(RULE-LENGTH, NUM)
134 # ---------------------------------
135 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
136 # on RHS.
137 m4_define([b4_rhs_location],
138 [(yylsp@{($2) - ($1)@})])
139
140
141
142 ## --------------------------------------------------------- ##
143 ## Defining symbol actions, e.g., printers and destructors. ##
144 ## --------------------------------------------------------- ##
145
146 # We do want M4 expansion after # for CPP macros.
147 m4_changecom()
148 m4_divert_push(0)dnl
149 @output(b4_parser_file_name@)
150 b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
151 [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])[
152
153 /* C LALR(1) parser skeleton written by Richard Stallman, by
154 simplifying the original so-called "semantic" parser. */
155
156 /* All symbols defined below should begin with yy or YY, to avoid
157 infringing on user name space. This should be done even for local
158 variables, as they might otherwise be expanded by user macros.
159 There are some unavoidable exceptions within include files to
160 define necessary library symbols; they are noted "INFRINGES ON
161 USER NAME SPACE" below. */
162
163 ]b4_identification
164 m4_ifdef([b4_percent_code_top],
165 [[/* Copy the %code "top" blocks. */
166 ]b4_user_code([b4_percent_code_top])])[]dnl
167 m4_if(b4_prefix, [yy], [],
168 [[/* Substitute the variable and function names. */
169 ]b4_pull_if([[#define yyparse ]b4_prefix[parse
170 ]])b4_push_if([[#define yypush_parse ]b4_prefix[push_parse
171 ]b4_pull_if([[#define yypull_parse ]b4_prefix[pull_parse
172 ]])[#define yypstate_new ]b4_prefix[pstate_new
173 #define yypstate_delete ]b4_prefix[pstate_delete
174 #define yypstate ]b4_prefix[pstate
175 ]])[#define yylex ]b4_prefix[lex
176 #define yyerror ]b4_prefix[error
177 #define yylval ]b4_prefix[lval
178 #define yychar ]b4_prefix[char
179 #define yydebug ]b4_prefix[debug
180 #define yynerrs ]b4_prefix[nerrs
181 ]b4_locations_if([[#define yylloc ]b4_prefix[lloc]])])[
182
183 /* Copy the first part of user declarations. */
184 ]b4_user_pre_prologue[
185
186 /* Enabling traces. */
187 #ifndef YYDEBUG
188 # define YYDEBUG ]b4_debug_flag[
189 #endif
190
191 /* Enabling verbose error messages. */
192 #ifdef YYERROR_VERBOSE
193 # undef YYERROR_VERBOSE
194 # define YYERROR_VERBOSE 1
195 #else
196 # define YYERROR_VERBOSE ]b4_error_verbose_flag[
197 #endif
198
199 /* Enabling the token table. */
200 #ifndef YYTOKEN_TABLE
201 # define YYTOKEN_TABLE ]b4_token_table[
202 #endif
203
204 ]m4_ifdef([b4_percent_code_requires],
205 [[/* Copy the %code "requires" blocks. */
206 ]b4_user_code([b4_percent_code_requires])])[]dnl
207
208 b4_token_enums_defines(b4_tokens)[
209
210 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
211 ]m4_ifdef([b4_stype],
212 [[typedef union ]b4_union_name[
213 ]b4_user_stype[
214 YYSTYPE;
215 # define YYSTYPE_IS_TRIVIAL 1]],
216 [m4_if(b4_tag_seen_flag, 0,
217 [[typedef int YYSTYPE;
218 # define YYSTYPE_IS_TRIVIAL 1]])])[
219 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
220 # define YYSTYPE_IS_DECLARED 1
221 #endif
222
223 ]b4_locations_if([#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
224 typedef struct YYLTYPE
225 {
226 int first_line;
227 int first_column;
228 int last_line;
229 int last_column;
230 } YYLTYPE;
231 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
232 # define YYLTYPE_IS_DECLARED 1
233 # define YYLTYPE_IS_TRIVIAL 1
234 #endif])
235
236 b4_push_if([[#ifndef YYPUSH_DECLS
237 # define YYPUSH_DECLS
238 struct yypstate;
239 typedef struct yypstate yypstate;
240 enum { YYPUSH_MORE = 4 };
241
242 ]b4_pull_if([b4_c_function_decl([[yyparse]], [[int]], b4_parse_param)
243 ])b4_c_function_decl([[yypush_parse]], [[int]],
244 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
245 [[[int yypushed_char]], [[yypushed_char]]],
246 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
247 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
248 b4_parse_param]))
249 b4_pull_if([b4_c_function_decl([[yypull_parse]], [[int]],
250 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
251 b4_parse_param]))])
252 b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []])
253 b4_c_function_decl([[yypstate_delete]], [[void]],
254 [[[yypstate *yyps]], [[yyps]]])[
255 #endif
256 ]])
257 m4_ifdef([b4_percent_code_provides],
258 [[/* Copy the %code "provides" blocks. */
259 ]b4_user_code([b4_percent_code_provides])])[]dnl
260
261 [/* Copy the second part of user declarations. */
262 ]b4_user_post_prologue
263 m4_ifdef([b4_percent_code],
264 [[/* Copy the unqualified %code blocks. */
265 ]b4_user_code([b4_percent_code])
266 ])[]dnl
267
268 [#ifdef short
269 # undef short
270 #endif
271
272 #ifdef YYTYPE_UINT8
273 typedef YYTYPE_UINT8 yytype_uint8;
274 #else
275 typedef unsigned char yytype_uint8;
276 #endif
277
278 #ifdef YYTYPE_INT8
279 typedef YYTYPE_INT8 yytype_int8;
280 #elif ]b4_c_modern[
281 typedef signed char yytype_int8;
282 #else
283 typedef short int yytype_int8;
284 #endif
285
286 #ifdef YYTYPE_UINT16
287 typedef YYTYPE_UINT16 yytype_uint16;
288 #else
289 typedef unsigned short int yytype_uint16;
290 #endif
291
292 #ifdef YYTYPE_INT16
293 typedef YYTYPE_INT16 yytype_int16;
294 #else
295 typedef short int yytype_int16;
296 #endif
297
298 #ifndef YYSIZE_T
299 # ifdef __SIZE_TYPE__
300 # define YYSIZE_T __SIZE_TYPE__
301 # elif defined size_t
302 # define YYSIZE_T size_t
303 # elif ! defined YYSIZE_T && ]b4_c_modern[
304 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */
305 # define YYSIZE_T size_t
306 # else
307 # define YYSIZE_T unsigned int
308 # endif
309 #endif
310
311 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
312
313 #ifndef YY_
314 # if YYENABLE_NLS
315 # if ENABLE_NLS
316 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */
317 # define YY_(msgid) dgettext ("bison-runtime", msgid)
318 # endif
319 # endif
320 # ifndef YY_
321 # define YY_(msgid) msgid
322 # endif
323 #endif
324
325 /* Suppress unused-variable warnings by "using" E. */
326 #if ! defined lint || defined __GNUC__
327 # define YYUSE(e) ((void) (e))
328 #else
329 # define YYUSE(e) /* empty */
330 #endif
331
332 /* Identity function, used to suppress warnings about constant conditions. */
333 #ifndef lint
334 # define YYID(n) (n)
335 #else
336 ]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[
337 {
338 return yyi;
339 }
340 #endif
341
342 #if ! defined yyoverflow || YYERROR_VERBOSE
343
344 /* The parser invokes alloca or malloc; define the necessary symbols. */
345
346 # ifdef YYSTACK_USE_ALLOCA
347 # if YYSTACK_USE_ALLOCA
348 # ifdef __GNUC__
349 # define YYSTACK_ALLOC __builtin_alloca
350 # elif defined __BUILTIN_VA_ARG_INCR
351 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
352 # elif defined _AIX
353 # define YYSTACK_ALLOC __alloca
354 # elif defined _MSC_VER
355 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
356 # define alloca _alloca
357 # else
358 # define YYSTACK_ALLOC alloca
359 # if ! defined _ALLOCA_H && ! defined _STDLIB_H && ]b4_c_modern[
360 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
361 # ifndef _STDLIB_H
362 # define _STDLIB_H 1
363 # endif
364 # endif
365 # endif
366 # endif
367 # endif
368
369 # ifdef YYSTACK_ALLOC
370 /* Pacify GCC's `empty if-body' warning. */
371 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
372 # ifndef YYSTACK_ALLOC_MAXIMUM
373 /* The OS might guarantee only one guard page at the bottom of the stack,
374 and a page size can be as small as 4096 bytes. So we cannot safely
375 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
376 to allow for a few compiler-allocated temporary stack slots. */
377 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
378 # endif
379 # else
380 # define YYSTACK_ALLOC YYMALLOC
381 # define YYSTACK_FREE YYFREE
382 # ifndef YYSTACK_ALLOC_MAXIMUM
383 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
384 # endif
385 # if (defined __cplusplus && ! defined _STDLIB_H \
386 && ! ((defined YYMALLOC || defined malloc) \
387 && (defined YYFREE || defined free)))
388 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
389 # ifndef _STDLIB_H
390 # define _STDLIB_H 1
391 # endif
392 # endif
393 # ifndef YYMALLOC
394 # define YYMALLOC malloc
395 # if ! defined malloc && ! defined _STDLIB_H && ]b4_c_modern[
396 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
397 # endif
398 # endif
399 # ifndef YYFREE
400 # define YYFREE free
401 # if ! defined free && ! defined _STDLIB_H && ]b4_c_modern[
402 void free (void *); /* INFRINGES ON USER NAME SPACE */
403 # endif
404 # endif
405 # endif
406 #endif /* ! defined yyoverflow || YYERROR_VERBOSE */
407
408
409 #if (! defined yyoverflow \
410 && (! defined __cplusplus \
411 || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
412 && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
413
414 /* A type that is properly aligned for any stack member. */
415 union yyalloc
416 {
417 yytype_int16 yyss_alloc;
418 YYSTYPE yyvs_alloc;
419 ]b4_locations_if([ YYLTYPE yyls_alloc;
420 ])dnl
421 [};
422
423 /* The size of the maximum gap between one aligned stack and the next. */
424 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
425
426 /* The size of an array large to enough to hold all stacks, each with
427 N elements. */
428 ]b4_locations_if(
429 [# define YYSTACK_BYTES(N) \
430 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
431 + 2 * YYSTACK_GAP_MAXIMUM)],
432 [# define YYSTACK_BYTES(N) \
433 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
434 + YYSTACK_GAP_MAXIMUM)])[
435
436 /* Copy COUNT objects from FROM to TO. The source and destination do
437 not overlap. */
438 # ifndef YYCOPY
439 # if defined __GNUC__ && 1 < __GNUC__
440 # define YYCOPY(To, From, Count) \
441 __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
442 # else
443 # define YYCOPY(To, From, Count) \
444 do \
445 { \
446 YYSIZE_T yyi; \
447 for (yyi = 0; yyi < (Count); yyi++) \
448 (To)[yyi] = (From)[yyi]; \
449 } \
450 while (YYID (0))
451 # endif
452 # endif
453
454 /* Relocate STACK from its old location to the new one. The
455 local variables YYSIZE and YYSTACKSIZE give the old and new number of
456 elements in the stack, and YYPTR gives the new location of the
457 stack. Advance YYPTR to a properly aligned location for the next
458 stack. */
459 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
460 do \
461 { \
462 YYSIZE_T yynewbytes; \
463 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
464 Stack = &yyptr->Stack_alloc; \
465 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
466 yyptr += yynewbytes / sizeof (*yyptr); \
467 } \
468 while (YYID (0))
469
470 #endif
471
472 /* YYFINAL -- State number of the termination state. */
473 #define YYFINAL ]b4_final_state_number[
474 /* YYLAST -- Last index in YYTABLE. */
475 #define YYLAST ]b4_last[
476
477 /* YYNTOKENS -- Number of terminals. */
478 #define YYNTOKENS ]b4_tokens_number[
479 /* YYNNTS -- Number of nonterminals. */
480 #define YYNNTS ]b4_nterms_number[
481 /* YYNRULES -- Number of rules. */
482 #define YYNRULES ]b4_rules_number[
483 /* YYNRULES -- Number of states. */
484 #define YYNSTATES ]b4_states_number[
485
486 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
487 #define YYUNDEFTOK ]b4_undef_token_number[
488 #define YYMAXUTOK ]b4_user_token_number_max[
489
490 #define YYTRANSLATE(YYX) \
491 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
492
493 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */
494 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
495 {
496 ]b4_translate[
497 };
498
499 #if YYDEBUG
500 /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
501 YYRHS. */
502 static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
503 {
504 ]b4_prhs[
505 };
506
507 /* YYRHS -- A `-1'-separated list of the rules' RHS. */
508 static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
509 {
510 ]b4_rhs[
511 };
512
513 /* YYRLINE[YYN] -- source line where rule number YYN was defined. */
514 static const ]b4_int_type_for([b4_rline])[ yyrline[] =
515 {
516 ]b4_rline[
517 };
518 #endif
519
520 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
521 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
522 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
523 static const char *const yytname[] =
524 {
525 ]b4_tname[
526 };
527 #endif
528
529 # ifdef YYPRINT
530 /* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
531 token YYLEX-NUM. */
532 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
533 {
534 ]b4_toknum[
535 };
536 # endif
537
538 /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
539 static const ]b4_int_type_for([b4_r1])[ yyr1[] =
540 {
541 ]b4_r1[
542 };
543
544 /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */
545 static const ]b4_int_type_for([b4_r2])[ yyr2[] =
546 {
547 ]b4_r2[
548 };
549
550 /* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state
551 STATE-NUM when YYTABLE doesn't specify something else to do. Zero
552 means the default is an error. */
553 static const ]b4_int_type_for([b4_defact])[ yydefact[] =
554 {
555 ]b4_defact[
556 };
557
558 /* YYDEFGOTO[NTERM-NUM]. */
559 static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
560 {
561 ]b4_defgoto[
562 };
563
564 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
565 STATE-NUM. */
566 #define YYPACT_NINF ]b4_pact_ninf[
567 static const ]b4_int_type_for([b4_pact])[ yypact[] =
568 {
569 ]b4_pact[
570 };
571
572 /* YYPGOTO[NTERM-NUM]. */
573 static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] =
574 {
575 ]b4_pgoto[
576 };
577
578 /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If
579 positive, shift that token. If negative, reduce the rule which
580 number is the opposite. If zero, do what YYDEFACT says.
581 If YYTABLE_NINF, syntax error. */
582 #define YYTABLE_NINF ]b4_table_ninf[
583 static const ]b4_int_type_for([b4_table])[ yytable[] =
584 {
585 ]b4_table[
586 };
587
588 static const ]b4_int_type_for([b4_check])[ yycheck[] =
589 {
590 ]b4_check[
591 };
592
593 /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
594 symbol of state STATE-NUM. */
595 static const ]b4_int_type_for([b4_stos])[ yystos[] =
596 {
597 ]b4_stos[
598 };
599
600 #define yyerrok (yyerrstatus = 0)
601 #define yyclearin (yychar = YYEMPTY)
602 #define YYEMPTY (-2)
603 #define YYEOF 0
604
605 #define YYACCEPT goto yyacceptlab
606 #define YYABORT goto yyabortlab
607 #define YYERROR goto yyerrorlab
608
609
610 /* Like YYERROR except do call yyerror. This remains here temporarily
611 to ease the transition to the new meaning of YYERROR, for GCC.
612 Once GCC version 2 has supplanted version 1, this can go. */
613
614 #define YYFAIL goto yyerrlab
615
616 #define YYRECOVERING() (!!yyerrstatus)
617
618 #define YYBACKUP(Token, Value) \
619 do \
620 if (yychar == YYEMPTY && yylen == 1) \
621 { \
622 yychar = (Token); \
623 yylval = (Value); \
624 yytoken = YYTRANSLATE (yychar); \
625 YYPOPSTACK (1); \
626 goto yybackup; \
627 } \
628 else \
629 { \
630 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
631 YYERROR; \
632 } \
633 while (YYID (0))
634
635
636 #define YYTERROR 1
637 #define YYERRCODE 256
638
639
640 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
641 If N is 0, then set CURRENT to the empty location which ends
642 the previous symbol: RHS[0] (always defined). */
643
644 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
645 #ifndef YYLLOC_DEFAULT
646 # define YYLLOC_DEFAULT(Current, Rhs, N) \
647 do \
648 if (YYID (N)) \
649 { \
650 (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
651 (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
652 (Current).last_line = YYRHSLOC (Rhs, N).last_line; \
653 (Current).last_column = YYRHSLOC (Rhs, N).last_column; \
654 } \
655 else \
656 { \
657 (Current).first_line = (Current).last_line = \
658 YYRHSLOC (Rhs, 0).last_line; \
659 (Current).first_column = (Current).last_column = \
660 YYRHSLOC (Rhs, 0).last_column; \
661 } \
662 while (YYID (0))
663 #endif
664
665
666 /* YY_LOCATION_PRINT -- Print the location on the stream.
667 This macro was not mandated originally: define only if we know
668 we won't break user code: when these are the locations we know. */
669
670 #ifndef YY_LOCATION_PRINT
671 # if YYLTYPE_IS_TRIVIAL
672 # define YY_LOCATION_PRINT(File, Loc) \
673 fprintf (File, "%d.%d-%d.%d", \
674 (Loc).first_line, (Loc).first_column, \
675 (Loc).last_line, (Loc).last_column)
676 # else
677 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
678 # endif
679 #endif
680
681
682 /* YYLEX -- calling `yylex' with the right arguments. */
683
684 #ifdef YYLEX_PARAM
685 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
686 #else
687 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
688 #endif
689
690 /* Enable debugging if requested. */
691 #if YYDEBUG
692
693 # ifndef YYFPRINTF
694 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
695 # define YYFPRINTF fprintf
696 # endif
697
698 # define YYDPRINTF(Args) \
699 do { \
700 if (yydebug) \
701 YYFPRINTF Args; \
702 } while (YYID (0))
703
704 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
705 do { \
706 if (yydebug) \
707 { \
708 YYFPRINTF (stderr, "%s ", Title); \
709 yy_symbol_print (stderr, \
710 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
711 YYFPRINTF (stderr, "\n"); \
712 } \
713 } while (YYID (0))
714
715 ]b4_yy_symbol_print_generate([b4_c_function_def])[
716
717 /*------------------------------------------------------------------.
718 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
719 | TOP (included). |
720 `------------------------------------------------------------------*/
721
722 ]b4_c_function_def([yy_stack_print], [static void],
723 [[yytype_int16 *yybottom], [yybottom]],
724 [[yytype_int16 *yytop], [yytop]])[
725 {
726 YYFPRINTF (stderr, "Stack now");
727 for (; yybottom <= yytop; yybottom++)
728 {
729 int yybot = *yybottom;
730 YYFPRINTF (stderr, " %d", yybot);
731 }
732 YYFPRINTF (stderr, "\n");
733 }
734
735 # define YY_STACK_PRINT(Bottom, Top) \
736 do { \
737 if (yydebug) \
738 yy_stack_print ((Bottom), (Top)); \
739 } while (YYID (0))
740
741
742 /*------------------------------------------------.
743 | Report that the YYRULE is going to be reduced. |
744 `------------------------------------------------*/
745
746 ]b4_c_function_def([yy_reduce_print], [static void],
747 [[YYSTYPE *yyvsp], [yyvsp]],
748 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
749 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
750 b4_parse_param]))[
751 {
752 int yynrhs = yyr2[yyrule];
753 int yyi;
754 unsigned long int yylno = yyrline[yyrule];
755 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
756 yyrule - 1, yylno);
757 /* The symbols being reduced. */
758 for (yyi = 0; yyi < yynrhs; yyi++)
759 {
760 fprintf (stderr, " $%d = ", yyi + 1);
761 yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
762 &]b4_rhs_value(yynrhs, yyi + 1)[
763 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
764 b4_user_args[);
765 fprintf (stderr, "\n");
766 }
767 }
768
769 # define YY_REDUCE_PRINT(Rule) \
770 do { \
771 if (yydebug) \
772 yy_reduce_print (yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
773 } while (YYID (0))
774
775 /* Nonzero means print parse trace. It is left uninitialized so that
776 multiple parsers can coexist. */
777 int yydebug;
778 #else /* !YYDEBUG */
779 # define YYDPRINTF(Args)
780 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
781 # define YY_STACK_PRINT(Bottom, Top)
782 # define YY_REDUCE_PRINT(Rule)
783 #endif /* !YYDEBUG */
784
785
786 /* YYINITDEPTH -- initial size of the parser's stacks. */
787 #ifndef YYINITDEPTH
788 # define YYINITDEPTH ]b4_stack_depth_init[
789 #endif
790
791 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
792 if the built-in stack extension method is used).
793
794 Do not make this value too large; the results are undefined if
795 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
796 evaluated with infinite-precision integer arithmetic. */
797
798 #ifndef YYMAXDEPTH
799 # define YYMAXDEPTH ]b4_stack_depth_max[
800 #endif
801
802 \f
803
804 #if YYERROR_VERBOSE
805
806 # ifndef yystrlen
807 # if defined __GLIBC__ && defined _STRING_H
808 # define yystrlen strlen
809 # else
810 /* Return the length of YYSTR. */
811 ]b4_c_function_def([yystrlen], [static YYSIZE_T],
812 [[const char *yystr], [yystr]])[
813 {
814 YYSIZE_T yylen;
815 for (yylen = 0; yystr[yylen]; yylen++)
816 continue;
817 return yylen;
818 }
819 # endif
820 # endif
821
822 # ifndef yystpcpy
823 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
824 # define yystpcpy stpcpy
825 # else
826 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
827 YYDEST. */
828 ]b4_c_function_def([yystpcpy], [static char *],
829 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
830 {
831 char *yyd = yydest;
832 const char *yys = yysrc;
833
834 while ((*yyd++ = *yys++) != '\0')
835 continue;
836
837 return yyd - 1;
838 }
839 # endif
840 # endif
841
842 # ifndef yytnamerr
843 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
844 quotes and backslashes, so that it's suitable for yyerror. The
845 heuristic is that double-quoting is unnecessary unless the string
846 contains an apostrophe, a comma, or backslash (other than
847 backslash-backslash). YYSTR is taken from yytname. If YYRES is
848 null, do not copy; instead, return the length of what the result
849 would have been. */
850 static YYSIZE_T
851 yytnamerr (char *yyres, const char *yystr)
852 {
853 if (*yystr == '"')
854 {
855 YYSIZE_T yyn = 0;
856 char const *yyp = yystr;
857
858 for (;;)
859 switch (*++yyp)
860 {
861 case '\'':
862 case ',':
863 goto do_not_strip_quotes;
864
865 case '\\':
866 if (*++yyp != '\\')
867 goto do_not_strip_quotes;
868 /* Fall through. */
869 default:
870 if (yyres)
871 yyres[yyn] = *yyp;
872 yyn++;
873 break;
874
875 case '"':
876 if (yyres)
877 yyres[yyn] = '\0';
878 return yyn;
879 }
880 do_not_strip_quotes: ;
881 }
882
883 if (! yyres)
884 return yystrlen (yystr);
885
886 return yystpcpy (yyres, yystr) - yyres;
887 }
888 # endif
889
890 /* Copy into YYRESULT an error message about the unexpected token
891 YYCHAR while in state YYSTATE. Return the number of bytes copied,
892 including the terminating null byte. If YYRESULT is null, do not
893 copy anything; just return the number of bytes that would be
894 copied. As a special case, return 0 if an ordinary "syntax error"
895 message will do. Return YYSIZE_MAXIMUM if overflow occurs during
896 size calculation. */
897 static YYSIZE_T
898 yysyntax_error (char *yyresult, int yystate, int yychar)
899 {
900 int yyn = yypact[yystate];
901
902 if (! (YYPACT_NINF < yyn && yyn <= YYLAST))
903 return 0;
904 else
905 {
906 int yytype = YYTRANSLATE (yychar);
907 YYSIZE_T yysize0 = yytnamerr (0, yytname[yytype]);
908 YYSIZE_T yysize = yysize0;
909 YYSIZE_T yysize1;
910 int yysize_overflow = 0;
911 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
912 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
913 int yyx;
914
915 # if 0
916 /* This is so xgettext sees the translatable formats that are
917 constructed on the fly. */
918 YY_("syntax error, unexpected %s");
919 YY_("syntax error, unexpected %s, expecting %s");
920 YY_("syntax error, unexpected %s, expecting %s or %s");
921 YY_("syntax error, unexpected %s, expecting %s or %s or %s");
922 YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s");
923 # endif
924 char *yyfmt;
925 char const *yyf;
926 static char const yyunexpected[] = "syntax error, unexpected %s";
927 static char const yyexpecting[] = ", expecting %s";
928 static char const yyor[] = " or %s";
929 char yyformat[sizeof yyunexpected
930 + sizeof yyexpecting - 1
931 + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
932 * (sizeof yyor - 1))];
933 char const *yyprefix = yyexpecting;
934
935 /* Start YYX at -YYN if negative to avoid negative indexes in
936 YYCHECK. */
937 int yyxbegin = yyn < 0 ? -yyn : 0;
938
939 /* Stay within bounds of both yycheck and yytname. */
940 int yychecklim = YYLAST - yyn + 1;
941 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
942 int yycount = 1;
943
944 yyarg[0] = yytname[yytype];
945 yyfmt = yystpcpy (yyformat, yyunexpected);
946
947 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
948 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
949 {
950 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
951 {
952 yycount = 1;
953 yysize = yysize0;
954 yyformat[sizeof yyunexpected - 1] = '\0';
955 break;
956 }
957 yyarg[yycount++] = yytname[yyx];
958 yysize1 = yysize + yytnamerr (0, yytname[yyx]);
959 yysize_overflow |= (yysize1 < yysize);
960 yysize = yysize1;
961 yyfmt = yystpcpy (yyfmt, yyprefix);
962 yyprefix = yyor;
963 }
964
965 yyf = YY_(yyformat);
966 yysize1 = yysize + yystrlen (yyf);
967 yysize_overflow |= (yysize1 < yysize);
968 yysize = yysize1;
969
970 if (yysize_overflow)
971 return YYSIZE_MAXIMUM;
972
973 if (yyresult)
974 {
975 /* Avoid sprintf, as that infringes on the user's name space.
976 Don't have undefined behavior even if the translation
977 produced a string with the wrong number of "%s"s. */
978 char *yyp = yyresult;
979 int yyi = 0;
980 while ((*yyp = *yyf) != '\0')
981 {
982 if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
983 {
984 yyp += yytnamerr (yyp, yyarg[yyi++]);
985 yyf += 2;
986 }
987 else
988 {
989 yyp++;
990 yyf++;
991 }
992 }
993 }
994 return yysize;
995 }
996 }
997 #endif /* YYERROR_VERBOSE */
998 \f
999
1000 ]b4_yydestruct_generate([b4_c_function_def])[
1001
1002 ]b4_push_if([],
1003 [[/* Prevent warnings from -Wmissing-prototypes. */
1004 #ifdef YYPARSE_PARAM
1005 ]b4_c_function_decl([yyparse], [int],
1006 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1007 #else /* ! YYPARSE_PARAM */
1008 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[
1009 #endif /* ! YYPARSE_PARAM */]])
1010
1011 m4_divert_push([KILL])# ======================== M4 code.
1012 # b4_declare_scanner_communication_variables
1013 # ------------------------------------------
1014 # Declare the variables that are global, or local to YYPARSE if
1015 # pure-parser.
1016 m4_define([b4_declare_scanner_communication_variables],
1017 [[/* The lookahead symbol. */
1018 int yychar;
1019
1020 /* The semantic value of the lookahead symbol. */
1021 YYSTYPE yylval;
1022 ]b4_locations_if([[
1023 /* Location data for the lookahead symbol. */
1024 YYLTYPE yylloc;
1025 ]])b4_pure_if([], [[
1026 /* Number of syntax errors so far. */
1027 int yynerrs;
1028 ]])])
1029
1030 # b4_declare_parser_state_variables
1031 # ---------------------------------
1032 # Declare all the variables that are needed to maintain the parser state
1033 # between calls to yypush_parse.
1034 m4_define([b4_declare_parser_state_variables],
1035 [b4_pure_if([[ /* Number of syntax errors so far. */
1036 int yynerrs;
1037 ]])[
1038 int yystate;
1039 /* Number of tokens to shift before error messages enabled. */
1040 int yyerrstatus;
1041
1042 /* Three stacks and their tools:
1043 `yyss': related to states,
1044 `yyvs': related to semantic values,
1045 `yyls': related to locations.
1046
1047 Refer to the stacks thru separate pointers, to allow yyoverflow
1048 to reallocate them elsewhere. */
1049
1050 /* The state stack. */
1051 yytype_int16 yyssa[YYINITDEPTH];
1052 yytype_int16 *yyss;
1053 yytype_int16 *yyssp;
1054
1055 /* The semantic value stack. */
1056 YYSTYPE yyvsa[YYINITDEPTH];
1057 YYSTYPE *yyvs;
1058 YYSTYPE *yyvsp;
1059 ]b4_locations_if([[
1060 /* The location stack. */
1061 YYLTYPE yylsa[YYINITDEPTH];
1062 YYLTYPE *yyls;
1063 YYLTYPE *yylsp;
1064
1065 /* The locations where the error started and ended. */
1066 YYLTYPE yyerror_range[2];
1067 ]])[
1068 YYSIZE_T yystacksize;
1069 ]])
1070
1071 m4_divert_pop([KILL])dnl# ====================== End of M4 code.
1072
1073 b4_pure_if([], [b4_declare_scanner_communication_variables])
1074
1075 b4_push_if(
1076 [[struct yypstate
1077 {
1078 ]b4_declare_parser_state_variables[
1079 /* Used to determine if this is the first time this instance has
1080 been used. */
1081 int yynew;
1082 };
1083
1084 ]b4_pull_if([b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
1085 {
1086 return yypull_parse (0]m4_ifset([b4_parse_param],
1087 [[, ]b4_c_args(b4_parse_param)])[);
1088 }
1089
1090 ]b4_c_function_def([[yypull_parse]], [[int]],
1091 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1092 b4_parse_param]))[
1093 {
1094 int yystatus;
1095 yypstate *yyps_local;
1096 ]b4_pure_if([[ int yychar;
1097 YYSTYPE yylval;
1098 ]b4_locations_if([[ YYLTYPE yylloc;
1099 ]])])[
1100 if (yyps == 0)
1101 yyps_local = yypstate_new ();
1102 else
1103 yyps_local = yyps;
1104 do {
1105 yychar = YYLEX;
1106 yystatus =
1107 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
1108 } while (yystatus == YYPUSH_MORE);
1109 if (yyps == 0)
1110 yypstate_delete (yyps_local);
1111 return yystatus;
1112 }
1113 ]])[
1114 /* Initialize the parser data structure. */
1115 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
1116 {
1117 yypstate *yyps = (yypstate *) malloc (sizeof *yyps);
1118 yyps->yynew = 1;
1119 return yyps;
1120 }
1121
1122 ]b4_c_function_def([[yypstate_delete]], [[void]],
1123 [[[yypstate *yyps]], [[yyps]]])[
1124 {
1125 free (yyps);
1126 }
1127
1128 ]b4_pure_if([[#define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs
1129 ]])[#define yystate yyps->yystate
1130 #define yyerrstatus yyps->yyerrstatus
1131 #define yyssa yyps->yyssa
1132 #define yyss yyps->yyss
1133 #define yyssp yyps->yyssp
1134 #define yyvsa yyps->yyvsa
1135 #define yyvs yyps->yyvs
1136 #define yyvsp yyps->yyvsp
1137 ]b4_locations_if([[#define yylsa yyps->yylsa
1138 #define yyls yyps->yyls
1139 #define yylsp yyps->yylsp
1140 #define yyerror_range yyps->yyerror_range
1141 ]])[#define yystacksize yyps->yystacksize
1142 ]])[
1143
1144 /*-------------------------.
1145 | yyparse or yypush_parse. |
1146 `-------------------------*/
1147
1148 ]b4_push_if([
1149 b4_c_function_def([[yypush_parse]], [[int]],
1150 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1151 [[[int yypushed_char]], [[yypushed_char]]],
1152 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1153 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1154 b4_parse_param]))], [
1155 #ifdef YYPARSE_PARAM
1156 b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])
1157 #else /* ! YYPARSE_PARAM */
1158 b4_c_function_def([yyparse], [int], b4_parse_param)
1159 #endif])[
1160 {
1161 ]b4_pure_if([b4_declare_scanner_communication_variables])
1162 b4_push_if([b4_pure_if([], [[ int yypushed_char = yychar;
1163 YYSTYPE yypushed_val = yylval;
1164 ]b4_locations_if([[YYLTYPE yypushed_loc = yylloc;
1165 ]])])],
1166 [b4_declare_parser_state_variables])[
1167 int yyn;
1168 int yyresult;
1169 /* Look-ahead token as an internal (translated) token number. */
1170 int yytoken;
1171 /* The variables used to return semantic value and location from the
1172 action routines. */
1173 YYSTYPE yyval;
1174 ]b4_locations_if([[ YYLTYPE yyloc;
1175 ]])[
1176 #if YYERROR_VERBOSE
1177 /* Buffer for error messages, and its allocated size. */
1178 char yymsgbuf[128];
1179 char *yymsg = yymsgbuf;
1180 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1181 #endif
1182
1183 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1184
1185 /* The number of symbols on the RHS of the reduced rule.
1186 Keep to zero when no symbol should be popped. */
1187 int yylen = 0;
1188 ]b4_push_if([[
1189 if (!yyps->yynew)
1190 {
1191 yyn = yypact[yystate];
1192 goto yyread_pushed_token;
1193 }
1194 ]])[
1195 yytoken = 0;
1196 yyss = yyssa;
1197 yyvs = yyvsa;
1198 ]b4_locations_if([[ yyls = yylsa;
1199 ]])[
1200 yystacksize = YYINITDEPTH;
1201
1202 YYDPRINTF ((stderr, "Starting parse\n"));
1203
1204 yystate = 0;
1205 yyerrstatus = 0;
1206 yynerrs = 0;
1207 yychar = YYEMPTY; /* Cause a token to be read. */
1208
1209 /* Initialize stack pointers.
1210 Waste one element of value and location stack
1211 so that they stay on the same level as the state stack.
1212 The wasted elements are never initialized. */
1213 yyssp = yyss;
1214 yyvsp = yyvs;
1215 ]b4_locations_if([[ yylsp = yyls;
1216
1217 #if YYLTYPE_IS_TRIVIAL
1218 /* Initialize the default location before parsing starts. */
1219 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1220 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1221 #endif
1222 ]])
1223 m4_ifdef([b4_initial_action], [
1224 m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
1225 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
1226 /* User initialization code. */
1227 b4_user_initial_action
1228 m4_popdef([b4_dollar_dollar])dnl
1229 m4_popdef([b4_at_dollar])])dnl
1230 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1231 ]])dnl
1232 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1233 ]])dnl
1234 [
1235 goto yysetstate;
1236
1237 /*------------------------------------------------------------.
1238 | yynewstate -- Push a new state, which is found in yystate. |
1239 `------------------------------------------------------------*/
1240 yynewstate:
1241 /* In all cases, when you get here, the value and location stacks
1242 have just been pushed. So pushing a state here evens the stacks. */
1243 yyssp++;
1244
1245 yysetstate:
1246 *yyssp = yystate;
1247
1248 if (yyss + yystacksize - 1 <= yyssp)
1249 {
1250 /* Get the current used size of the three stacks, in elements. */
1251 YYSIZE_T yysize = yyssp - yyss + 1;
1252
1253 #ifdef yyoverflow
1254 {
1255 /* Give user a chance to reallocate the stack. Use copies of
1256 these so that the &'s don't force the real ones into
1257 memory. */
1258 YYSTYPE *yyvs1 = yyvs;
1259 yytype_int16 *yyss1 = yyss;
1260 ]b4_locations_if([ YYLTYPE *yyls1 = yyls;])[
1261
1262 /* Each stack pointer address is followed by the size of the
1263 data in use in that stack, in bytes. This used to be a
1264 conditional around just the two extra args, but that might
1265 be undefined if yyoverflow is a macro. */
1266 yyoverflow (YY_("memory exhausted"),
1267 &yyss1, yysize * sizeof (*yyssp),
1268 &yyvs1, yysize * sizeof (*yyvsp),
1269 ]b4_locations_if([ &yyls1, yysize * sizeof (*yylsp),])[
1270 &yystacksize);
1271 ]b4_locations_if([ yyls = yyls1;])[
1272 yyss = yyss1;
1273 yyvs = yyvs1;
1274 }
1275 #else /* no yyoverflow */
1276 # ifndef YYSTACK_RELOCATE
1277 goto yyexhaustedlab;
1278 # else
1279 /* Extend the stack our own way. */
1280 if (YYMAXDEPTH <= yystacksize)
1281 goto yyexhaustedlab;
1282 yystacksize *= 2;
1283 if (YYMAXDEPTH < yystacksize)
1284 yystacksize = YYMAXDEPTH;
1285
1286 {
1287 yytype_int16 *yyss1 = yyss;
1288 union yyalloc *yyptr =
1289 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1290 if (! yyptr)
1291 goto yyexhaustedlab;
1292 YYSTACK_RELOCATE (yyss_alloc, yyss);
1293 YYSTACK_RELOCATE (yyvs_alloc, yyvs);
1294 ]b4_locations_if([ YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1295 # undef YYSTACK_RELOCATE
1296 if (yyss1 != yyssa)
1297 YYSTACK_FREE (yyss1);
1298 }
1299 # endif
1300 #endif /* no yyoverflow */
1301
1302 yyssp = yyss + yysize - 1;
1303 yyvsp = yyvs + yysize - 1;
1304 ]b4_locations_if([ yylsp = yyls + yysize - 1;])[
1305
1306 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1307 (unsigned long int) yystacksize));
1308
1309 if (yyss + yystacksize - 1 <= yyssp)
1310 YYABORT;
1311 }
1312
1313 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1314
1315 if (yystate == YYFINAL)
1316 YYACCEPT;
1317
1318 goto yybackup;
1319
1320 /*-----------.
1321 | yybackup. |
1322 `-----------*/
1323 yybackup:
1324
1325 /* Do appropriate processing given the current state. Read a
1326 lookahead token if we need one and don't already have one. */
1327
1328 /* First try to decide what to do without reference to lookahead token. */
1329 yyn = yypact[yystate];
1330 if (yyn == YYPACT_NINF)
1331 goto yydefault;
1332
1333 /* Not known => get a lookahead token if don't already have one. */
1334
1335 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1336 if (yychar == YYEMPTY)
1337 {
1338 ]b4_push_if([[ if (!yyps->yynew)
1339 {
1340 ]b4_use_push_for_pull_if([],
1341 [[ YYDPRINTF ((stderr, "Return for a new token:\n"));
1342 ]])[ yyresult = YYPUSH_MORE;
1343 goto yypushreturn;
1344 }
1345 yyps->yynew = 0;
1346 ]b4_pure_if([], [[
1347 /* Restoring the pushed token is only necessary for the first
1348 yypush_parse invocation since subsequent invocations don't overwrite
1349 it before jumping to yyread_pushed_token. */
1350 yychar = yypushed_char;
1351 yylval = yypushed_val;
1352 ]b4_locations_if([[yylloc = yypushed_loc;
1353 ]])])[
1354 yyread_pushed_token:
1355 ]])[ YYDPRINTF ((stderr, "Reading a token: "));
1356 ]b4_push_if([b4_pure_if([[ yychar = yypushed_char;
1357 if (yypushed_val)
1358 yylval = *yypushed_val;
1359 ]b4_locations_if([[ if (yypushed_loc)
1360 yylloc = *yypushed_loc;
1361 ]])])],
1362 [[ yychar = YYLEX;
1363 ]])[ }
1364
1365 if (yychar <= YYEOF)
1366 {
1367 yychar = yytoken = YYEOF;
1368 YYDPRINTF ((stderr, "Now at end of input.\n"));
1369 }
1370 else
1371 {
1372 yytoken = YYTRANSLATE (yychar);
1373 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1374 }
1375
1376 /* If the proper action on seeing token YYTOKEN is to reduce or to
1377 detect an error, take that action. */
1378 yyn += yytoken;
1379 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
1380 goto yydefault;
1381 yyn = yytable[yyn];
1382 if (yyn <= 0)
1383 {
1384 if (yyn == 0 || yyn == YYTABLE_NINF)
1385 goto yyerrlab;
1386 yyn = -yyn;
1387 goto yyreduce;
1388 }
1389
1390 /* Count tokens shifted since error; after three, turn off error
1391 status. */
1392 if (yyerrstatus)
1393 yyerrstatus--;
1394
1395 /* Shift the lookahead token. */
1396 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1397
1398 /* Discard the shifted token. */
1399 yychar = YYEMPTY;
1400
1401 yystate = yyn;
1402 *++yyvsp = yylval;
1403 ]b4_locations_if([ *++yylsp = yylloc;])[
1404 goto yynewstate;
1405
1406
1407 /*-----------------------------------------------------------.
1408 | yydefault -- do the default action for the current state. |
1409 `-----------------------------------------------------------*/
1410 yydefault:
1411 yyn = yydefact[yystate];
1412 if (yyn == 0)
1413 goto yyerrlab;
1414 goto yyreduce;
1415
1416
1417 /*-----------------------------.
1418 | yyreduce -- Do a reduction. |
1419 `-----------------------------*/
1420 yyreduce:
1421 /* yyn is the number of a rule to reduce with. */
1422 yylen = yyr2[yyn];
1423
1424 /* If YYLEN is nonzero, implement the default value of the action:
1425 `$$ = $1'.
1426
1427 Otherwise, the following line sets YYVAL to garbage.
1428 This behavior is undocumented and Bison
1429 users should not rely upon it. Assigning to YYVAL
1430 unconditionally makes the parser a bit smaller, and it avoids a
1431 GCC warning that YYVAL may be used uninitialized. */
1432 yyval = yyvsp[1-yylen];
1433
1434 ]b4_locations_if(
1435 [[ /* Default location. */
1436 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1437 YY_REDUCE_PRINT (yyn);
1438 switch (yyn)
1439 {
1440 ]b4_user_actions[
1441 default: break;
1442 }
1443 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1444
1445 YYPOPSTACK (yylen);
1446 yylen = 0;
1447 YY_STACK_PRINT (yyss, yyssp);
1448
1449 *++yyvsp = yyval;
1450 ]b4_locations_if([ *++yylsp = yyloc;])[
1451
1452 /* Now `shift' the result of the reduction. Determine what state
1453 that goes to, based on the state we popped back to and the rule
1454 number reduced by. */
1455
1456 yyn = yyr1[yyn];
1457
1458 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1459 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1460 yystate = yytable[yystate];
1461 else
1462 yystate = yydefgoto[yyn - YYNTOKENS];
1463
1464 goto yynewstate;
1465
1466
1467 /*------------------------------------.
1468 | yyerrlab -- here on detecting error |
1469 `------------------------------------*/
1470 yyerrlab:
1471 /* If not already recovering from an error, report this error. */
1472 if (!yyerrstatus)
1473 {
1474 ++yynerrs;
1475 #if ! YYERROR_VERBOSE
1476 yyerror (]b4_yyerror_args[YY_("syntax error"));
1477 #else
1478 {
1479 YYSIZE_T yysize = yysyntax_error (0, yystate, yychar);
1480 if (yymsg_alloc < yysize && yymsg_alloc < YYSTACK_ALLOC_MAXIMUM)
1481 {
1482 YYSIZE_T yyalloc = 2 * yysize;
1483 if (! (yysize <= yyalloc && yyalloc <= YYSTACK_ALLOC_MAXIMUM))
1484 yyalloc = YYSTACK_ALLOC_MAXIMUM;
1485 if (yymsg != yymsgbuf)
1486 YYSTACK_FREE (yymsg);
1487 yymsg = (char *) YYSTACK_ALLOC (yyalloc);
1488 if (yymsg)
1489 yymsg_alloc = yyalloc;
1490 else
1491 {
1492 yymsg = yymsgbuf;
1493 yymsg_alloc = sizeof yymsgbuf;
1494 }
1495 }
1496
1497 if (0 < yysize && yysize <= yymsg_alloc)
1498 {
1499 (void) yysyntax_error (yymsg, yystate, yychar);
1500 yyerror (]b4_yyerror_args[yymsg);
1501 }
1502 else
1503 {
1504 yyerror (]b4_yyerror_args[YY_("syntax error"));
1505 if (yysize != 0)
1506 goto yyexhaustedlab;
1507 }
1508 }
1509 #endif
1510 }
1511
1512 ]b4_locations_if([[ yyerror_range[0] = yylloc;]])[
1513
1514 if (yyerrstatus == 3)
1515 {
1516 /* If just tried and failed to reuse lookahead token after an
1517 error, discard it. */
1518
1519 if (yychar <= YYEOF)
1520 {
1521 /* Return failure if at end of input. */
1522 if (yychar == YYEOF)
1523 YYABORT;
1524 }
1525 else
1526 {
1527 yydestruct ("Error: discarding",
1528 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1529 yychar = YYEMPTY;
1530 }
1531 }
1532
1533 /* Else will try to reuse lookahead token after shifting the error
1534 token. */
1535 goto yyerrlab1;
1536
1537
1538 /*---------------------------------------------------.
1539 | yyerrorlab -- error raised explicitly by YYERROR. |
1540 `---------------------------------------------------*/
1541 yyerrorlab:
1542
1543 /* Pacify compilers like GCC when the user code never invokes
1544 YYERROR and the label yyerrorlab therefore never appears in user
1545 code. */
1546 if (/*CONSTCOND*/ 0)
1547 goto yyerrorlab;
1548
1549 ]b4_locations_if([[ yyerror_range[0] = yylsp[1-yylen];
1550 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1551 this YYERROR. */
1552 YYPOPSTACK (yylen);
1553 yylen = 0;
1554 YY_STACK_PRINT (yyss, yyssp);
1555 yystate = *yyssp;
1556 goto yyerrlab1;
1557
1558
1559 /*-------------------------------------------------------------.
1560 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1561 `-------------------------------------------------------------*/
1562 yyerrlab1:
1563 yyerrstatus = 3; /* Each real token shifted decrements this. */
1564
1565 for (;;)
1566 {
1567 yyn = yypact[yystate];
1568 if (yyn != YYPACT_NINF)
1569 {
1570 yyn += YYTERROR;
1571 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1572 {
1573 yyn = yytable[yyn];
1574 if (0 < yyn)
1575 break;
1576 }
1577 }
1578
1579 /* Pop the current state because it cannot handle the error token. */
1580 if (yyssp == yyss)
1581 YYABORT;
1582
1583 ]b4_locations_if([[ yyerror_range[0] = *yylsp;]])[
1584 yydestruct ("Error: popping",
1585 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1586 YYPOPSTACK (1);
1587 yystate = *yyssp;
1588 YY_STACK_PRINT (yyss, yyssp);
1589 }
1590
1591 *++yyvsp = yylval;
1592 ]b4_locations_if([[
1593 yyerror_range[1] = yylloc;
1594 /* Using YYLLOC is tempting, but would change the location of
1595 the lookahead. YYLOC is available though. */
1596 YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
1597 *++yylsp = yyloc;]])[
1598
1599 /* Shift the error token. */
1600 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1601
1602 yystate = yyn;
1603 goto yynewstate;
1604
1605
1606 /*-------------------------------------.
1607 | yyacceptlab -- YYACCEPT comes here. |
1608 `-------------------------------------*/
1609 yyacceptlab:
1610 yyresult = 0;
1611 goto yyreturn;
1612
1613 /*-----------------------------------.
1614 | yyabortlab -- YYABORT comes here. |
1615 `-----------------------------------*/
1616 yyabortlab:
1617 yyresult = 1;
1618 goto yyreturn;
1619
1620 #ifndef yyoverflow
1621 /*-------------------------------------------------.
1622 | yyexhaustedlab -- memory exhaustion comes here. |
1623 `-------------------------------------------------*/
1624 yyexhaustedlab:
1625 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1626 yyresult = 2;
1627 /* Fall through. */
1628 #endif
1629
1630 yyreturn:
1631 if (yychar != YYEMPTY)
1632 yydestruct ("Cleanup: discarding lookahead",
1633 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1634 /* Do not reclaim the symbols of the rule which action triggered
1635 this YYABORT or YYACCEPT. */
1636 YYPOPSTACK (yylen);
1637 YY_STACK_PRINT (yyss, yyssp);
1638 while (yyssp != yyss)
1639 {
1640 yydestruct ("Cleanup: popping",
1641 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1642 YYPOPSTACK (1);
1643 }
1644 #ifndef yyoverflow
1645 if (yyss != yyssa)
1646 YYSTACK_FREE (yyss);
1647 #endif
1648 ]b4_push_if([[ yyps->yynew = 1;
1649
1650 yypushreturn:
1651 ]])[#if YYERROR_VERBOSE
1652 if (yymsg != yymsgbuf)
1653 YYSTACK_FREE (yymsg);
1654 #endif
1655 /* Make sure YYID is used. */
1656 return YYID (yyresult);
1657 }
1658
1659
1660 ]b4_epilogue
1661 b4_defines_if(
1662 [@output(b4_spec_defines_file@)
1663 b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl '
1664 [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])
1665
1666 m4_ifdef([b4_percent_code_requires],
1667 [[/* Copy the %code "requires" blocks. */
1668 ]b4_user_code([b4_percent_code_requires])])[]dnl
1669
1670 b4_token_enums_defines(b4_tokens)
1671
1672 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
1673 ]m4_ifdef([b4_stype],
1674 [[typedef union ]b4_union_name[
1675 ]b4_user_stype[
1676 YYSTYPE;
1677 # define YYSTYPE_IS_TRIVIAL 1]],
1678 [m4_if(b4_tag_seen_flag, 0,
1679 [[typedef int YYSTYPE;
1680 # define YYSTYPE_IS_TRIVIAL 1]])])[
1681 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
1682 # define YYSTYPE_IS_DECLARED 1
1683 #endif
1684
1685 ]b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;]])
1686
1687 b4_locations_if(
1688 [#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
1689 typedef struct YYLTYPE
1690 {
1691 int first_line;
1692 int first_column;
1693 int last_line;
1694 int last_column;
1695 } YYLTYPE;
1696 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
1697 # define YYLTYPE_IS_DECLARED 1
1698 # define YYLTYPE_IS_TRIVIAL 1
1699 #endif
1700
1701 ]b4_pure_if([], [[extern YYLTYPE ]b4_prefix[lloc;]])
1702 )dnl b4_locations_if
1703
1704 b4_push_if([[#ifndef YYPUSH_DECLS
1705 # define YYPUSH_DECLS
1706 struct ]b4_prefix[pstate;
1707 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
1708 enum { YYPUSH_MORE = 4 };
1709 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
1710 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
1711 [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([,
1712 [[[int yypushed_char]], [[yypushed_char]]],
1713 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1714 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1715 b4_parse_param]))
1716 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
1717 [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1718 b4_parse_param]))])
1719 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
1720 [[[void]], []])
1721 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
1722 [[b4_prefix[pstate *yyps]], [[yyps]]])[
1723 #endif
1724 ]])
1725 m4_ifdef([b4_percent_code_provides],
1726 [[/* Copy the %code "provides" blocks. */
1727 ]b4_user_code([b4_percent_code_provides])])[]
1728 ])dnl b4_defines_if
1729 m4_divert_pop(0)
bison