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[bison.git] / data / yacc.c
1 -*- C -*-
2 # Yacc compatible skeleton for Bison
3
4 # Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
5 # 2007, 2008 Free Software Foundation, Inc.
6
7 m4_pushdef([b4_copyright_years],
8 [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008])
9
10 # This program is free software: you can redistribute it and/or modify
11 # it under the terms of the GNU General Public License as published by
12 # the Free Software Foundation, either version 3 of the License, or
13 # (at your option) any later version.
14 #
15 # This program is distributed in the hope that it will be useful,
16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 # GNU General Public License for more details.
19 #
20 # You should have received a copy of the GNU General Public License
21 # along with this program. If not, see <http://www.gnu.org/licenses/>.
22
23 # Check the value of %define api.push_pull.
24 b4_percent_define_default([[api.push_pull]], [[pull]])
25 b4_percent_define_check_values([[[[api.push_pull]],
26 [[pull]], [[push]], [[both]]]])
27 b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
28 b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])
29 m4_case(b4_percent_define_get([[api.push_pull]]),
30 [pull], [m4_define([b4_push_flag], [[0]])],
31 [push], [m4_define([b4_pull_flag], [[0]])])
32
33 # Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing
34 # tests function as written, don't let BISON_USE_PUSH_FOR_PULL modify Bison's
35 # behavior at all when push parsing is already requested.
36 b4_define_flag_if([use_push_for_pull])
37 b4_use_push_for_pull_if([
38 b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])],
39 [m4_define([b4_push_flag], [[1]])])])
40
41 m4_include(b4_pkgdatadir/[c.m4])
42
43 ## ---------------- ##
44 ## Default values. ##
45 ## ---------------- ##
46
47 # Stack parameters.
48 m4_define_default([b4_stack_depth_max], [10000])
49 m4_define_default([b4_stack_depth_init], [200])
50
51
52 ## ------------------------ ##
53 ## Pure/impure interfaces. ##
54 ## ------------------------ ##
55
56 b4_percent_define_default([[api.pure]], [[false]])
57 b4_define_flag_if([pure])
58 m4_define([b4_pure_flag],
59 [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])
60
61 # b4_yacc_pure_if(IF-TRUE, IF-FALSE)
62 # ----------------------------------
63 # Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
64 m4_define([b4_yacc_pure_if],
65 [b4_pure_if([m4_ifset([b4_parse_param],
66 [$1], [$2])],
67 [$2])])
68
69
70 # b4_yyerror_args
71 # ---------------
72 # Arguments passed to yyerror: user args plus yylloc.
73 m4_define([b4_yyerror_args],
74 [b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
75 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
76
77
78 # b4_lex_param
79 # ------------
80 # Accumulate in b4_lex_param all the yylex arguments.
81 # b4_lex_param arrives quoted twice, but we want to keep only one level.
82 m4_define([b4_lex_param],
83 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
84 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
85 m4_ifdef([b4_lex_param], b4_lex_param)))
86
87
88 ## ------------ ##
89 ## Data Types. ##
90 ## ------------ ##
91
92 # b4_int_type(MIN, MAX)
93 # ---------------------
94 # Return the smallest int type able to handle numbers ranging from
95 # MIN to MAX (included). Overwrite the version from c.m4, which
96 # uses only C89 types, so that the user can override the shorter
97 # types, and so that pre-C89 compilers are handled correctly.
98 m4_define([b4_int_type],
99 [m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8],
100 b4_ints_in($@, [-128], [127]), [1], [yytype_int8],
101
102 b4_ints_in($@, [0], [65535]), [1], [yytype_uint16],
103 b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
104
105 m4_eval([0 <= $1]), [1], [unsigned int],
106
107 [int])])
108
109
110 ## ----------------- ##
111 ## Semantic Values. ##
112 ## ----------------- ##
113
114
115 # b4_lhs_value([TYPE])
116 # --------------------
117 # Expansion of $<TYPE>$.
118 m4_define([b4_lhs_value],
119 [b4_symbol_value(yyval, [$1])])
120
121
122 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
123 # --------------------------------------
124 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
125 # symbols on RHS.
126 m4_define([b4_rhs_value],
127 [b4_symbol_value([yyvsp@{($2) - ($1)@}], [$3])])
128
129
130
131 ## ----------- ##
132 ## Locations. ##
133 ## ----------- ##
134
135 # b4_lhs_location()
136 # -----------------
137 # Expansion of @$.
138 m4_define([b4_lhs_location],
139 [(yyloc)])
140
141
142 # b4_rhs_location(RULE-LENGTH, NUM)
143 # ---------------------------------
144 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
145 # on RHS.
146 m4_define([b4_rhs_location],
147 [(yylsp@{($2) - ($1)@})])
148
149
150
151 ## --------------------------------------------------------- ##
152 ## Defining symbol actions, e.g., printers and destructors. ##
153 ## --------------------------------------------------------- ##
154
155 # We do want M4 expansion after # for CPP macros.
156 m4_changecom()
157 m4_divert_push(0)dnl
158 @output(b4_parser_file_name@)@
159 b4_copyright([Implementation for Bison's Yacc-like parsers in C])dnl'
160 [
161
162 /* C LALR(1) parser skeleton written by Richard Stallman, by
163 simplifying the original so-called "semantic" parser. */
164
165 /* All symbols defined below should begin with yy or YY, to avoid
166 infringing on user name space. This should be done even for local
167 variables, as they might otherwise be expanded by user macros.
168 There are some unavoidable exceptions within include files to
169 define necessary library symbols; they are noted "INFRINGES ON
170 USER NAME SPACE" below. */
171
172 ]b4_identification
173 b4_percent_code_get([[top]])[]dnl
174 m4_if(b4_prefix, [yy], [],
175 [[/* Substitute the variable and function names. */
176 ]b4_pull_if([[#define yyparse ]b4_prefix[parse
177 ]])b4_push_if([[#define yypush_parse ]b4_prefix[push_parse
178 ]b4_pull_if([[#define yypull_parse ]b4_prefix[pull_parse
179 ]])[#define yypstate_new ]b4_prefix[pstate_new
180 #define yypstate_delete ]b4_prefix[pstate_delete
181 #define yypstate ]b4_prefix[pstate
182 ]])[#define yylex ]b4_prefix[lex
183 #define yyerror ]b4_prefix[error
184 #define yylval ]b4_prefix[lval
185 #define yychar ]b4_prefix[char
186 #define yydebug ]b4_prefix[debug
187 #define yynerrs ]b4_prefix[nerrs
188 ]b4_locations_if([[#define yylloc ]b4_prefix[lloc]])])[
189
190 /* Copy the first part of user declarations. */
191 ]b4_user_pre_prologue[
192
193 /* Enabling traces. */
194 #ifndef YYDEBUG
195 # define YYDEBUG ]b4_debug_flag[
196 #endif
197
198 /* Enabling verbose error messages. */
199 #ifdef YYERROR_VERBOSE
200 # undef YYERROR_VERBOSE
201 # define YYERROR_VERBOSE 1
202 #else
203 # define YYERROR_VERBOSE ]b4_error_verbose_flag[
204 #endif
205
206 /* Enabling the token table. */
207 #ifndef YYTOKEN_TABLE
208 # define YYTOKEN_TABLE ]b4_token_table[
209 #endif
210
211 ]b4_percent_code_get([[requires]])[]dnl
212
213 b4_token_enums_defines(b4_tokens)[
214
215 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
216 ]m4_ifdef([b4_stype],
217 [[typedef union ]b4_union_name[
218 {
219 ]b4_user_stype[
220 } YYSTYPE;
221 # define YYSTYPE_IS_TRIVIAL 1]],
222 [m4_if(b4_tag_seen_flag, 0,
223 [[typedef int YYSTYPE;
224 # define YYSTYPE_IS_TRIVIAL 1]])])[
225 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
226 # define YYSTYPE_IS_DECLARED 1
227 #endif]b4_locations_if([[
228
229 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
230 typedef struct YYLTYPE
231 {
232 int first_line;
233 int first_column;
234 int last_line;
235 int last_column;
236 } YYLTYPE;
237 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
238 # define YYLTYPE_IS_DECLARED 1
239 # define YYLTYPE_IS_TRIVIAL 1
240 #endif]])b4_push_if([[
241
242 #ifndef YYPUSH_DECLS
243 # define YYPUSH_DECLS
244 struct yypstate;
245 typedef struct yypstate yypstate;
246 enum { YYPUSH_MORE = 4 };
247
248 ]b4_pull_if([b4_c_function_decl([[yyparse]], [[int]], b4_parse_param)
249 ])b4_c_function_decl([[yypush_parse]], [[int]],
250 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
251 [[[int yypushed_char]], [[yypushed_char]]],
252 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
253 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
254 b4_parse_param]))
255 b4_pull_if([b4_c_function_decl([[yypull_parse]], [[int]],
256 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
257 b4_parse_param]))])
258 b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []])
259 b4_c_function_decl([[yypstate_delete]], [[void]],
260 [[[yypstate *yyps]], [[yyps]]])[
261 #endif]])
262
263 b4_percent_code_get([[provides]])[]dnl
264
265 [/* Copy the second part of user declarations. */
266 ]b4_user_post_prologue
267 b4_percent_code_get[]dnl
268
269 [#ifdef short
270 # undef short
271 #endif
272
273 #ifdef YYTYPE_UINT8
274 typedef YYTYPE_UINT8 yytype_uint8;
275 #else
276 typedef unsigned char yytype_uint8;
277 #endif
278
279 #ifdef YYTYPE_INT8
280 typedef YYTYPE_INT8 yytype_int8;
281 #elif ]b4_c_modern[
282 typedef signed char yytype_int8;
283 #else
284 typedef short int yytype_int8;
285 #endif
286
287 #ifdef YYTYPE_UINT16
288 typedef YYTYPE_UINT16 yytype_uint16;
289 #else
290 typedef unsigned short int yytype_uint16;
291 #endif
292
293 #ifdef YYTYPE_INT16
294 typedef YYTYPE_INT16 yytype_int16;
295 #else
296 typedef short int yytype_int16;
297 #endif
298
299 #ifndef YYSIZE_T
300 # ifdef __SIZE_TYPE__
301 # define YYSIZE_T __SIZE_TYPE__
302 # elif defined size_t
303 # define YYSIZE_T size_t
304 # elif ! defined YYSIZE_T && ]b4_c_modern[
305 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */
306 # define YYSIZE_T size_t
307 # else
308 # define YYSIZE_T unsigned int
309 # endif
310 #endif
311
312 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
313
314 #ifndef YY_
315 # if YYENABLE_NLS
316 # if ENABLE_NLS
317 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */
318 # define YY_(msgid) dgettext ("bison-runtime", msgid)
319 # endif
320 # endif
321 # ifndef YY_
322 # define YY_(msgid) msgid
323 # endif
324 #endif
325
326 /* Suppress unused-variable warnings by "using" E. */
327 #if ! defined lint || defined __GNUC__
328 # define YYUSE(e) ((void) (e))
329 #else
330 # define YYUSE(e) /* empty */
331 #endif
332
333 /* Identity function, used to suppress warnings about constant conditions. */
334 #ifndef lint
335 # define YYID(n) (n)
336 #else
337 ]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[
338 {
339 return yyi;
340 }
341 #endif
342
343 #if ! defined yyoverflow || YYERROR_VERBOSE
344
345 ]b4_push_if([],
346 [[/* The parser invokes alloca or malloc; define the necessary symbols. */
347
348 # ifdef YYSTACK_USE_ALLOCA
349 # if YYSTACK_USE_ALLOCA
350 # ifdef __GNUC__
351 # define YYSTACK_ALLOC __builtin_alloca
352 # elif defined __BUILTIN_VA_ARG_INCR
353 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
354 # elif defined _AIX
355 # define YYSTACK_ALLOC __alloca
356 # elif defined _MSC_VER
357 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
358 # define alloca _alloca
359 # else
360 # define YYSTACK_ALLOC alloca
361 # if ! defined _ALLOCA_H && ! defined _STDLIB_H && ]b4_c_modern[
362 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
363 # ifndef _STDLIB_H
364 # define _STDLIB_H 1
365 # endif
366 # endif
367 # endif
368 # endif
369 # endif
370
371 ]])dnl
372 [# ifdef YYSTACK_ALLOC
373 /* Pacify GCC's `empty if-body' warning. */
374 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
375 # ifndef YYSTACK_ALLOC_MAXIMUM
376 /* The OS might guarantee only one guard page at the bottom of the stack,
377 and a page size can be as small as 4096 bytes. So we cannot safely
378 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
379 to allow for a few compiler-allocated temporary stack slots. */
380 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
381 # endif
382 # else
383 # define YYSTACK_ALLOC YYMALLOC
384 # define YYSTACK_FREE YYFREE
385 # ifndef YYSTACK_ALLOC_MAXIMUM
386 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
387 # endif
388 # if (defined __cplusplus && ! defined _STDLIB_H \
389 && ! ((defined YYMALLOC || defined malloc) \
390 && (defined YYFREE || defined free)))
391 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
392 # ifndef _STDLIB_H
393 # define _STDLIB_H 1
394 # endif
395 # endif
396 # ifndef YYMALLOC
397 # define YYMALLOC malloc
398 # if ! defined malloc && ! defined _STDLIB_H && ]b4_c_modern[
399 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
400 # endif
401 # endif
402 # ifndef YYFREE
403 # define YYFREE free
404 # if ! defined free && ! defined _STDLIB_H && ]b4_c_modern[
405 void free (void *); /* INFRINGES ON USER NAME SPACE */
406 # endif
407 # endif
408 # endif
409 #endif /* ! defined yyoverflow || YYERROR_VERBOSE */
410
411
412 #if (! defined yyoverflow \
413 && (! defined __cplusplus \
414 || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
415 && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
416
417 /* A type that is properly aligned for any stack member. */
418 union yyalloc
419 {
420 yytype_int16 yyss_alloc;
421 YYSTYPE yyvs_alloc;]b4_locations_if([
422 YYLTYPE yyls_alloc;])[
423 };
424
425 /* The size of the maximum gap between one aligned stack and the next. */
426 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
427
428 /* The size of an array large to enough to hold all stacks, each with
429 N elements. */
430 ]b4_locations_if(
431 [# define YYSTACK_BYTES(N) \
432 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
433 + 2 * YYSTACK_GAP_MAXIMUM)],
434 [# define YYSTACK_BYTES(N) \
435 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
436 + YYSTACK_GAP_MAXIMUM)])[
437
438 /* Copy COUNT objects from FROM to TO. The source and destination do
439 not overlap. */
440 # ifndef YYCOPY
441 # if defined __GNUC__ && 1 < __GNUC__
442 # define YYCOPY(To, From, Count) \
443 __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
444 # else
445 # define YYCOPY(To, From, Count) \
446 do \
447 { \
448 YYSIZE_T yyi; \
449 for (yyi = 0; yyi < (Count); yyi++) \
450 (To)[yyi] = (From)[yyi]; \
451 } \
452 while (YYID (0))
453 # endif
454 # endif
455
456 /* Relocate STACK from its old location to the new one. The
457 local variables YYSIZE and YYSTACKSIZE give the old and new number of
458 elements in the stack, and YYPTR gives the new location of the
459 stack. Advance YYPTR to a properly aligned location for the next
460 stack. */
461 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
462 do \
463 { \
464 YYSIZE_T yynewbytes; \
465 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
466 Stack = &yyptr->Stack_alloc; \
467 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
468 yyptr += yynewbytes / sizeof (*yyptr); \
469 } \
470 while (YYID (0))
471
472 #endif
473
474 /* YYFINAL -- State number of the termination state. */
475 #define YYFINAL ]b4_final_state_number[
476 /* YYLAST -- Last index in YYTABLE. */
477 #define YYLAST ]b4_last[
478
479 /* YYNTOKENS -- Number of terminals. */
480 #define YYNTOKENS ]b4_tokens_number[
481 /* YYNNTS -- Number of nonterminals. */
482 #define YYNNTS ]b4_nterms_number[
483 /* YYNRULES -- Number of rules. */
484 #define YYNRULES ]b4_rules_number[
485 /* YYNSTATES -- Number of states. */
486 #define YYNSTATES ]b4_states_number[
487
488 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
489 #define YYUNDEFTOK ]b4_undef_token_number[
490 #define YYMAXUTOK ]b4_user_token_number_max[
491
492 #define YYTRANSLATE(YYX) \
493 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
494
495 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */
496 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
497 {
498 ]b4_translate[
499 };
500
501 #if YYDEBUG
502 /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
503 YYRHS. */
504 static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
505 {
506 ]b4_prhs[
507 };
508
509 /* YYRHS -- A `-1'-separated list of the rules' RHS. */
510 static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
511 {
512 ]b4_rhs[
513 };
514
515 /* YYRLINE[YYN] -- source line where rule number YYN was defined. */
516 static const ]b4_int_type_for([b4_rline])[ yyrline[] =
517 {
518 ]b4_rline[
519 };
520 #endif
521
522 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
523 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
524 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
525 static const char *const yytname[] =
526 {
527 ]b4_tname[
528 };
529 #endif
530
531 # ifdef YYPRINT
532 /* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
533 token YYLEX-NUM. */
534 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
535 {
536 ]b4_toknum[
537 };
538 # endif
539
540 /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
541 static const ]b4_int_type_for([b4_r1])[ yyr1[] =
542 {
543 ]b4_r1[
544 };
545
546 /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */
547 static const ]b4_int_type_for([b4_r2])[ yyr2[] =
548 {
549 ]b4_r2[
550 };
551
552 /* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state
553 STATE-NUM when YYTABLE doesn't specify something else to do. Zero
554 means the default is an error. */
555 static const ]b4_int_type_for([b4_defact])[ yydefact[] =
556 {
557 ]b4_defact[
558 };
559
560 /* YYDEFGOTO[NTERM-NUM]. */
561 static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
562 {
563 ]b4_defgoto[
564 };
565
566 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
567 STATE-NUM. */
568 #define YYPACT_NINF ]b4_pact_ninf[
569 static const ]b4_int_type_for([b4_pact])[ yypact[] =
570 {
571 ]b4_pact[
572 };
573
574 /* YYPGOTO[NTERM-NUM]. */
575 static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] =
576 {
577 ]b4_pgoto[
578 };
579
580 /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If
581 positive, shift that token. If negative, reduce the rule which
582 number is the opposite. If zero, do what YYDEFACT says.
583 If YYTABLE_NINF, syntax error. */
584 #define YYTABLE_NINF ]b4_table_ninf[
585 static const ]b4_int_type_for([b4_table])[ yytable[] =
586 {
587 ]b4_table[
588 };
589
590 static const ]b4_int_type_for([b4_check])[ yycheck[] =
591 {
592 ]b4_check[
593 };
594
595 /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
596 symbol of state STATE-NUM. */
597 static const ]b4_int_type_for([b4_stos])[ yystos[] =
598 {
599 ]b4_stos[
600 };
601
602 #define yyerrok (yyerrstatus = 0)
603 #define yyclearin (yychar = YYEMPTY)
604 #define YYEMPTY (-2)
605 #define YYEOF 0
606
607 #define YYACCEPT goto yyacceptlab
608 #define YYABORT goto yyabortlab
609 #define YYERROR goto yyerrorlab
610
611
612 /* Like YYERROR except do call yyerror. This remains here temporarily
613 to ease the transition to the new meaning of YYERROR, for GCC.
614 Once GCC version 2 has supplanted version 1, this can go. */
615
616 #define YYFAIL goto yyerrlab
617
618 #define YYRECOVERING() (!!yyerrstatus)
619
620 #define YYBACKUP(Token, Value) \
621 do \
622 if (yychar == YYEMPTY && yylen == 1) \
623 { \
624 yychar = (Token); \
625 yylval = (Value); \
626 yytoken = YYTRANSLATE (yychar); \
627 YYPOPSTACK (1); \
628 goto yybackup; \
629 } \
630 else \
631 { \
632 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
633 YYERROR; \
634 } \
635 while (YYID (0))
636
637
638 #define YYTERROR 1
639 #define YYERRCODE 256
640
641
642 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
643 If N is 0, then set CURRENT to the empty location which ends
644 the previous symbol: RHS[0] (always defined). */
645
646 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
647 #ifndef YYLLOC_DEFAULT
648 # define YYLLOC_DEFAULT(Current, Rhs, N) \
649 do \
650 if (YYID (N)) \
651 { \
652 (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
653 (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
654 (Current).last_line = YYRHSLOC (Rhs, N).last_line; \
655 (Current).last_column = YYRHSLOC (Rhs, N).last_column; \
656 } \
657 else \
658 { \
659 (Current).first_line = (Current).last_line = \
660 YYRHSLOC (Rhs, 0).last_line; \
661 (Current).first_column = (Current).last_column = \
662 YYRHSLOC (Rhs, 0).last_column; \
663 } \
664 while (YYID (0))
665 #endif
666
667
668 /* YY_LOCATION_PRINT -- Print the location on the stream.
669 This macro was not mandated originally: define only if we know
670 we won't break user code: when these are the locations we know. */
671
672 #ifndef YY_LOCATION_PRINT
673 # if YYLTYPE_IS_TRIVIAL
674 # define YY_LOCATION_PRINT(File, Loc) \
675 fprintf (File, "%d.%d-%d.%d", \
676 (Loc).first_line, (Loc).first_column, \
677 (Loc).last_line, (Loc).last_column)
678 # else
679 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
680 # endif
681 #endif
682
683
684 /* YYLEX -- calling `yylex' with the right arguments. */
685
686 #ifdef YYLEX_PARAM
687 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
688 #else
689 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
690 #endif
691
692 /* Enable debugging if requested. */
693 #if YYDEBUG
694
695 # ifndef YYFPRINTF
696 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
697 # define YYFPRINTF fprintf
698 # endif
699
700 # define YYDPRINTF(Args) \
701 do { \
702 if (yydebug) \
703 YYFPRINTF Args; \
704 } while (YYID (0))
705
706 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
707 do { \
708 if (yydebug) \
709 { \
710 YYFPRINTF (stderr, "%s ", Title); \
711 yy_symbol_print (stderr, \
712 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
713 YYFPRINTF (stderr, "\n"); \
714 } \
715 } while (YYID (0))
716
717 ]b4_yy_symbol_print_generate([b4_c_function_def])[
718
719 /*------------------------------------------------------------------.
720 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
721 | TOP (included). |
722 `------------------------------------------------------------------*/
723
724 ]b4_c_function_def([yy_stack_print], [static void],
725 [[yytype_int16 *yybottom], [yybottom]],
726 [[yytype_int16 *yytop], [yytop]])[
727 {
728 YYFPRINTF (stderr, "Stack now");
729 for (; yybottom <= yytop; yybottom++)
730 {
731 int yybot = *yybottom;
732 YYFPRINTF (stderr, " %d", yybot);
733 }
734 YYFPRINTF (stderr, "\n");
735 }
736
737 # define YY_STACK_PRINT(Bottom, Top) \
738 do { \
739 if (yydebug) \
740 yy_stack_print ((Bottom), (Top)); \
741 } while (YYID (0))
742
743
744 /*------------------------------------------------.
745 | Report that the YYRULE is going to be reduced. |
746 `------------------------------------------------*/
747
748 ]b4_c_function_def([yy_reduce_print], [static void],
749 [[YYSTYPE *yyvsp], [yyvsp]],
750 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
751 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
752 b4_parse_param]))[
753 {
754 int yynrhs = yyr2[yyrule];
755 int yyi;
756 unsigned long int yylno = yyrline[yyrule];
757 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
758 yyrule - 1, yylno);
759 /* The symbols being reduced. */
760 for (yyi = 0; yyi < yynrhs; yyi++)
761 {
762 YYFPRINTF (stderr, " $%d = ", yyi + 1);
763 yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
764 &]b4_rhs_value(yynrhs, yyi + 1)[
765 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
766 b4_user_args[);
767 YYFPRINTF (stderr, "\n");
768 }
769 }
770
771 # define YY_REDUCE_PRINT(Rule) \
772 do { \
773 if (yydebug) \
774 yy_reduce_print (yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
775 } while (YYID (0))
776
777 /* Nonzero means print parse trace. It is left uninitialized so that
778 multiple parsers can coexist. */
779 int yydebug;
780 #else /* !YYDEBUG */
781 # define YYDPRINTF(Args)
782 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
783 # define YY_STACK_PRINT(Bottom, Top)
784 # define YY_REDUCE_PRINT(Rule)
785 #endif /* !YYDEBUG */
786
787
788 /* YYINITDEPTH -- initial size of the parser's stacks. */
789 #ifndef YYINITDEPTH
790 # define YYINITDEPTH ]b4_stack_depth_init[
791 #endif
792
793 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
794 if the built-in stack extension method is used).
795
796 Do not make this value too large; the results are undefined if
797 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
798 evaluated with infinite-precision integer arithmetic. */
799
800 #ifndef YYMAXDEPTH
801 # define YYMAXDEPTH ]b4_stack_depth_max[
802 #endif
803
804 \f
805
806 #if YYERROR_VERBOSE
807
808 # ifndef yystrlen
809 # if defined __GLIBC__ && defined _STRING_H
810 # define yystrlen strlen
811 # else
812 /* Return the length of YYSTR. */
813 ]b4_c_function_def([yystrlen], [static YYSIZE_T],
814 [[const char *yystr], [yystr]])[
815 {
816 YYSIZE_T yylen;
817 for (yylen = 0; yystr[yylen]; yylen++)
818 continue;
819 return yylen;
820 }
821 # endif
822 # endif
823
824 # ifndef yystpcpy
825 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
826 # define yystpcpy stpcpy
827 # else
828 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
829 YYDEST. */
830 ]b4_c_function_def([yystpcpy], [static char *],
831 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
832 {
833 char *yyd = yydest;
834 const char *yys = yysrc;
835
836 while ((*yyd++ = *yys++) != '\0')
837 continue;
838
839 return yyd - 1;
840 }
841 # endif
842 # endif
843
844 # ifndef yytnamerr
845 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
846 quotes and backslashes, so that it's suitable for yyerror. The
847 heuristic is that double-quoting is unnecessary unless the string
848 contains an apostrophe, a comma, or backslash (other than
849 backslash-backslash). YYSTR is taken from yytname. If YYRES is
850 null, do not copy; instead, return the length of what the result
851 would have been. */
852 static YYSIZE_T
853 yytnamerr (char *yyres, const char *yystr)
854 {
855 if (*yystr == '"')
856 {
857 YYSIZE_T yyn = 0;
858 char const *yyp = yystr;
859
860 for (;;)
861 switch (*++yyp)
862 {
863 case '\'':
864 case ',':
865 goto do_not_strip_quotes;
866
867 case '\\':
868 if (*++yyp != '\\')
869 goto do_not_strip_quotes;
870 /* Fall through. */
871 default:
872 if (yyres)
873 yyres[yyn] = *yyp;
874 yyn++;
875 break;
876
877 case '"':
878 if (yyres)
879 yyres[yyn] = '\0';
880 return yyn;
881 }
882 do_not_strip_quotes: ;
883 }
884
885 if (! yyres)
886 return yystrlen (yystr);
887
888 return yystpcpy (yyres, yystr) - yyres;
889 }
890 # endif
891
892 /* Copy into YYRESULT an error message about the unexpected token
893 YYCHAR while in state YYSTATE. Return the number of bytes copied,
894 including the terminating null byte. If YYRESULT is null, do not
895 copy anything; just return the number of bytes that would be
896 copied. As a special case, return 0 if an ordinary "syntax error"
897 message will do. Return YYSIZE_MAXIMUM if overflow occurs during
898 size calculation. */
899 static YYSIZE_T
900 yysyntax_error (char *yyresult, int yystate, int yychar)
901 {
902 int yyn = yypact[yystate];
903
904 if (! (YYPACT_NINF < yyn && yyn <= YYLAST))
905 return 0;
906 else
907 {
908 int yytype = YYTRANSLATE (yychar);
909 YYSIZE_T yysize0 = yytnamerr (0, yytname[yytype]);
910 YYSIZE_T yysize = yysize0;
911 YYSIZE_T yysize1;
912 int yysize_overflow = 0;
913 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
914 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
915 int yyx;
916
917 # if 0
918 /* This is so xgettext sees the translatable formats that are
919 constructed on the fly. */
920 YY_("syntax error, unexpected %s");
921 YY_("syntax error, unexpected %s, expecting %s");
922 YY_("syntax error, unexpected %s, expecting %s or %s");
923 YY_("syntax error, unexpected %s, expecting %s or %s or %s");
924 YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s");
925 # endif
926 char *yyfmt;
927 char const *yyf;
928 static char const yyunexpected[] = "syntax error, unexpected %s";
929 static char const yyexpecting[] = ", expecting %s";
930 static char const yyor[] = " or %s";
931 char yyformat[sizeof yyunexpected
932 + sizeof yyexpecting - 1
933 + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
934 * (sizeof yyor - 1))];
935 char const *yyprefix = yyexpecting;
936
937 /* Start YYX at -YYN if negative to avoid negative indexes in
938 YYCHECK. */
939 int yyxbegin = yyn < 0 ? -yyn : 0;
940
941 /* Stay within bounds of both yycheck and yytname. */
942 int yychecklim = YYLAST - yyn + 1;
943 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
944 int yycount = 1;
945
946 yyarg[0] = yytname[yytype];
947 yyfmt = yystpcpy (yyformat, yyunexpected);
948
949 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
950 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
951 {
952 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
953 {
954 yycount = 1;
955 yysize = yysize0;
956 yyformat[sizeof yyunexpected - 1] = '\0';
957 break;
958 }
959 yyarg[yycount++] = yytname[yyx];
960 yysize1 = yysize + yytnamerr (0, yytname[yyx]);
961 yysize_overflow |= (yysize1 < yysize);
962 yysize = yysize1;
963 yyfmt = yystpcpy (yyfmt, yyprefix);
964 yyprefix = yyor;
965 }
966
967 yyf = YY_(yyformat);
968 yysize1 = yysize + yystrlen (yyf);
969 yysize_overflow |= (yysize1 < yysize);
970 yysize = yysize1;
971
972 if (yysize_overflow)
973 return YYSIZE_MAXIMUM;
974
975 if (yyresult)
976 {
977 /* Avoid sprintf, as that infringes on the user's name space.
978 Don't have undefined behavior even if the translation
979 produced a string with the wrong number of "%s"s. */
980 char *yyp = yyresult;
981 int yyi = 0;
982 while ((*yyp = *yyf) != '\0')
983 {
984 if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
985 {
986 yyp += yytnamerr (yyp, yyarg[yyi++]);
987 yyf += 2;
988 }
989 else
990 {
991 yyp++;
992 yyf++;
993 }
994 }
995 }
996 return yysize;
997 }
998 }
999 #endif /* YYERROR_VERBOSE */
1000 \f
1001
1002 ]b4_yydestruct_generate([b4_c_function_def])[
1003
1004 ]b4_push_if([],
1005 [[/* Prevent warnings from -Wmissing-prototypes. */
1006 #ifdef YYPARSE_PARAM
1007 ]b4_c_function_decl([yyparse], [int],
1008 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1009 #else /* ! YYPARSE_PARAM */
1010 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[
1011 #endif /* ! YYPARSE_PARAM */]])
1012
1013 m4_divert_push([KILL])# ======================== M4 code.
1014 # b4_declare_scanner_communication_variables
1015 # ------------------------------------------
1016 # Declare the variables that are global, or local to YYPARSE if
1017 # pure-parser.
1018 m4_define([b4_declare_scanner_communication_variables],
1019 [[/* The lookahead symbol. */
1020 int yychar;
1021
1022 /* The semantic value of the lookahead symbol. */
1023 YYSTYPE yylval;
1024 ]b4_locations_if([[
1025 /* Location data for the lookahead symbol. */
1026 YYLTYPE yylloc;
1027 ]])b4_pure_if([], [[
1028 /* Number of syntax errors so far. */
1029 int yynerrs;
1030 ]])])
1031
1032 # b4_declare_parser_state_variables
1033 # ---------------------------------
1034 # Declare all the variables that are needed to maintain the parser state
1035 # between calls to yypush_parse.
1036 m4_define([b4_declare_parser_state_variables],
1037 [b4_pure_if([[ /* Number of syntax errors so far. */
1038 int yynerrs;
1039 ]])[
1040 int yystate;
1041 /* Number of tokens to shift before error messages enabled. */
1042 int yyerrstatus;
1043
1044 /* The stacks and their tools:
1045 `yyss': related to states.
1046 `yyvs': related to semantic values.]b4_locations_if([[
1047 `yyls': related to locations.]])[
1048
1049 Refer to the stacks thru separate pointers, to allow yyoverflow
1050 to reallocate them elsewhere. */
1051
1052 /* The state stack. */
1053 yytype_int16 yyssa[YYINITDEPTH];
1054 yytype_int16 *yyss;
1055 yytype_int16 *yyssp;
1056
1057 /* The semantic value stack. */
1058 YYSTYPE yyvsa[YYINITDEPTH];
1059 YYSTYPE *yyvs;
1060 YYSTYPE *yyvsp;
1061 ]b4_locations_if([[
1062 /* The location stack. */
1063 YYLTYPE yylsa[YYINITDEPTH];
1064 YYLTYPE *yyls;
1065 YYLTYPE *yylsp;
1066
1067 /* The locations where the error started and ended. */
1068 YYLTYPE yyerror_range[2];
1069 ]])[
1070 YYSIZE_T yystacksize;
1071 ]])
1072
1073 m4_divert_pop([KILL])dnl# ====================== End of M4 code.
1074
1075 b4_pure_if([], [b4_declare_scanner_communication_variables])
1076
1077 b4_push_if(
1078 [[struct yypstate
1079 {
1080 ]b4_declare_parser_state_variables[
1081 /* Used to determine if this is the first time this instance has
1082 been used. */
1083 int yynew;
1084 };]b4_pure_if([], [[
1085
1086 static char yypstate_allocated = 0;]])b4_pull_if([
1087
1088 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
1089 {
1090 return yypull_parse (0]m4_ifset([b4_parse_param],
1091 [[, ]b4_c_args(b4_parse_param)])[);
1092 }
1093
1094 ]b4_c_function_def([[yypull_parse]], [[int]],
1095 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1096 b4_parse_param]))[
1097 {
1098 int yystatus;
1099 yypstate *yyps_local;]b4_pure_if([[
1100 int yychar;
1101 YYSTYPE yylval;]b4_locations_if([[
1102 YYLTYPE yylloc;]])])[
1103 if (yyps == 0)
1104 {
1105 yyps_local = yypstate_new ();
1106 if (!yyps_local)
1107 {]b4_pure_if([[
1108 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1109 if (!yypstate_allocated)
1110 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1111 return 2;
1112 }
1113 }
1114 else
1115 yyps_local = yyps;
1116 do {
1117 yychar = YYLEX;
1118 yystatus =
1119 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
1120 } while (yystatus == YYPUSH_MORE);
1121 if (yyps == 0)
1122 yypstate_delete (yyps_local);
1123 return yystatus;
1124 }]])[
1125
1126 /* Initialize the parser data structure. */
1127 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
1128 {
1129 yypstate *yyps;]b4_pure_if([], [[
1130 if (yypstate_allocated)
1131 return 0;]])[
1132 yyps = (yypstate *) malloc (sizeof *yyps);
1133 if (!yyps)
1134 return 0;
1135 yyps->yynew = 1;]b4_pure_if([], [[
1136 yypstate_allocated = 1;]])[
1137 return yyps;
1138 }
1139
1140 ]b4_c_function_def([[yypstate_delete]], [[void]],
1141 [[[yypstate *yyps]], [[yyps]]])[
1142 {
1143 #ifndef yyoverflow
1144 /* If the stack was reallocated but the parse did not complete, then the
1145 stack still needs to be freed. */
1146 if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1147 YYSTACK_FREE (yyps->yyss);
1148 #endif
1149 free (yyps);]b4_pure_if([], [[
1150 yypstate_allocated = 0;]])[
1151 }
1152
1153 ]b4_pure_if([[#define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs
1154 ]])[#define yystate yyps->yystate
1155 #define yyerrstatus yyps->yyerrstatus
1156 #define yyssa yyps->yyssa
1157 #define yyss yyps->yyss
1158 #define yyssp yyps->yyssp
1159 #define yyvsa yyps->yyvsa
1160 #define yyvs yyps->yyvs
1161 #define yyvsp yyps->yyvsp
1162 ]b4_locations_if([[#define yylsa yyps->yylsa
1163 #define yyls yyps->yyls
1164 #define yylsp yyps->yylsp
1165 #define yyerror_range yyps->yyerror_range
1166 ]])[#define yystacksize yyps->yystacksize
1167 ]])[
1168 /*-------------------------.
1169 | yyparse or yypush_parse. |
1170 `-------------------------*/
1171 ]b4_push_if([
1172 b4_c_function_def([[yypush_parse]], [[int]],
1173 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1174 [[[int yypushed_char]], [[yypushed_char]]],
1175 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1176 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1177 b4_parse_param]))], [
1178 #ifdef YYPARSE_PARAM
1179 b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])
1180 #else /* ! YYPARSE_PARAM */
1181 b4_c_function_def([yyparse], [int], b4_parse_param)
1182 #endif])[
1183 {
1184 ]b4_pure_if([b4_declare_scanner_communication_variables])
1185 b4_push_if([b4_pure_if([], [[ int yypushed_char = yychar;
1186 YYSTYPE yypushed_val = yylval;
1187 ]b4_locations_if([[YYLTYPE yypushed_loc = yylloc;
1188 ]])])],
1189 [b4_declare_parser_state_variables])[
1190 int yyn;
1191 int yyresult;
1192 /* Lookahead token as an internal (translated) token number. */
1193 int yytoken;
1194 /* The variables used to return semantic value and location from the
1195 action routines. */
1196 YYSTYPE yyval;]b4_locations_if([[
1197 YYLTYPE yyloc;]])[
1198
1199 #if YYERROR_VERBOSE
1200 /* Buffer for error messages, and its allocated size. */
1201 char yymsgbuf[128];
1202 char *yymsg = yymsgbuf;
1203 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1204 #endif
1205
1206 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1207
1208 /* The number of symbols on the RHS of the reduced rule.
1209 Keep to zero when no symbol should be popped. */
1210 int yylen = 0;]b4_push_if([[
1211
1212 if (!yyps->yynew)
1213 {
1214 yyn = yypact[yystate];
1215 goto yyread_pushed_token;
1216 }]])[
1217
1218 yytoken = 0;
1219 yyss = yyssa;
1220 yyvs = yyvsa;]b4_locations_if([[
1221 yyls = yylsa;]])[
1222 yystacksize = YYINITDEPTH;
1223
1224 YYDPRINTF ((stderr, "Starting parse\n"));
1225
1226 yystate = 0;
1227 yyerrstatus = 0;
1228 yynerrs = 0;
1229 yychar = YYEMPTY; /* Cause a token to be read. */
1230
1231 /* Initialize stack pointers.
1232 Waste one element of value and location stack
1233 so that they stay on the same level as the state stack.
1234 The wasted elements are never initialized. */
1235 yyssp = yyss;
1236 yyvsp = yyvs;]b4_locations_if([[
1237 yylsp = yyls;
1238
1239 #if YYLTYPE_IS_TRIVIAL
1240 /* Initialize the default location before parsing starts. */
1241 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1242 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1243 #endif]])
1244 m4_ifdef([b4_initial_action],[
1245 m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
1246 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
1247 /* User initialization code. */
1248 b4_user_initial_action
1249 m4_popdef([b4_dollar_dollar])dnl
1250 m4_popdef([b4_at_dollar])])dnl
1251 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1252 ]])dnl
1253 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1254 ]])[
1255 goto yysetstate;
1256
1257 /*------------------------------------------------------------.
1258 | yynewstate -- Push a new state, which is found in yystate. |
1259 `------------------------------------------------------------*/
1260 yynewstate:
1261 /* In all cases, when you get here, the value and location stacks
1262 have just been pushed. So pushing a state here evens the stacks. */
1263 yyssp++;
1264
1265 yysetstate:
1266 *yyssp = yystate;
1267
1268 if (yyss + yystacksize - 1 <= yyssp)
1269 {
1270 /* Get the current used size of the three stacks, in elements. */
1271 YYSIZE_T yysize = yyssp - yyss + 1;
1272
1273 #ifdef yyoverflow
1274 {
1275 /* Give user a chance to reallocate the stack. Use copies of
1276 these so that the &'s don't force the real ones into
1277 memory. */
1278 YYSTYPE *yyvs1 = yyvs;
1279 yytype_int16 *yyss1 = yyss;]b4_locations_if([
1280 YYLTYPE *yyls1 = yyls;])[
1281
1282 /* Each stack pointer address is followed by the size of the
1283 data in use in that stack, in bytes. This used to be a
1284 conditional around just the two extra args, but that might
1285 be undefined if yyoverflow is a macro. */
1286 yyoverflow (YY_("memory exhausted"),
1287 &yyss1, yysize * sizeof (*yyssp),
1288 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1289 &yyls1, yysize * sizeof (*yylsp),])[
1290 &yystacksize);
1291 ]b4_locations_if([
1292 yyls = yyls1;])[
1293 yyss = yyss1;
1294 yyvs = yyvs1;
1295 }
1296 #else /* no yyoverflow */
1297 # ifndef YYSTACK_RELOCATE
1298 goto yyexhaustedlab;
1299 # else
1300 /* Extend the stack our own way. */
1301 if (YYMAXDEPTH <= yystacksize)
1302 goto yyexhaustedlab;
1303 yystacksize *= 2;
1304 if (YYMAXDEPTH < yystacksize)
1305 yystacksize = YYMAXDEPTH;
1306
1307 {
1308 yytype_int16 *yyss1 = yyss;
1309 union yyalloc *yyptr =
1310 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1311 if (! yyptr)
1312 goto yyexhaustedlab;
1313 YYSTACK_RELOCATE (yyss_alloc, yyss);
1314 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1315 YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1316 # undef YYSTACK_RELOCATE
1317 if (yyss1 != yyssa)
1318 YYSTACK_FREE (yyss1);
1319 }
1320 # endif
1321 #endif /* no yyoverflow */
1322
1323 yyssp = yyss + yysize - 1;
1324 yyvsp = yyvs + yysize - 1;]b4_locations_if([
1325 yylsp = yyls + yysize - 1;])[
1326
1327 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1328 (unsigned long int) yystacksize));
1329
1330 if (yyss + yystacksize - 1 <= yyssp)
1331 YYABORT;
1332 }
1333
1334 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1335
1336 if (yystate == YYFINAL)
1337 YYACCEPT;
1338
1339 goto yybackup;
1340
1341 /*-----------.
1342 | yybackup. |
1343 `-----------*/
1344 yybackup:
1345
1346 /* Do appropriate processing given the current state. Read a
1347 lookahead token if we need one and don't already have one. */
1348
1349 /* First try to decide what to do without reference to lookahead token. */
1350 yyn = yypact[yystate];
1351 if (yyn == YYPACT_NINF)
1352 goto yydefault;
1353
1354 /* Not known => get a lookahead token if don't already have one. */
1355
1356 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1357 if (yychar == YYEMPTY)
1358 {]b4_push_if([[
1359 if (!yyps->yynew)
1360 {]b4_use_push_for_pull_if([], [[
1361 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1362 yyresult = YYPUSH_MORE;
1363 goto yypushreturn;
1364 }
1365 yyps->yynew = 0;]b4_pure_if([], [[
1366 /* Restoring the pushed token is only necessary for the first
1367 yypush_parse invocation since subsequent invocations don't overwrite
1368 it before jumping to yyread_pushed_token. */
1369 yychar = yypushed_char;
1370 yylval = yypushed_val;]b4_locations_if([[
1371 yylloc = yypushed_loc;]])])[
1372 yyread_pushed_token:]])[
1373 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1374 yychar = yypushed_char;
1375 if (yypushed_val)
1376 yylval = *yypushed_val;]b4_locations_if([[
1377 if (yypushed_loc)
1378 yylloc = *yypushed_loc;]])])], [[
1379 yychar = YYLEX;]])[
1380 }
1381
1382 if (yychar <= YYEOF)
1383 {
1384 yychar = yytoken = YYEOF;
1385 YYDPRINTF ((stderr, "Now at end of input.\n"));
1386 }
1387 else
1388 {
1389 yytoken = YYTRANSLATE (yychar);
1390 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1391 }
1392
1393 /* If the proper action on seeing token YYTOKEN is to reduce or to
1394 detect an error, take that action. */
1395 yyn += yytoken;
1396 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
1397 goto yydefault;
1398 yyn = yytable[yyn];
1399 if (yyn <= 0)
1400 {
1401 if (yyn == 0 || yyn == YYTABLE_NINF)
1402 goto yyerrlab;
1403 yyn = -yyn;
1404 goto yyreduce;
1405 }
1406
1407 /* Count tokens shifted since error; after three, turn off error
1408 status. */
1409 if (yyerrstatus)
1410 yyerrstatus--;
1411
1412 /* Shift the lookahead token. */
1413 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1414
1415 /* Discard the shifted token. */
1416 yychar = YYEMPTY;
1417
1418 yystate = yyn;
1419 *++yyvsp = yylval;
1420 ]b4_locations_if([ *++yylsp = yylloc;])[
1421 goto yynewstate;
1422
1423
1424 /*-----------------------------------------------------------.
1425 | yydefault -- do the default action for the current state. |
1426 `-----------------------------------------------------------*/
1427 yydefault:
1428 yyn = yydefact[yystate];
1429 if (yyn == 0)
1430 goto yyerrlab;
1431 goto yyreduce;
1432
1433
1434 /*-----------------------------.
1435 | yyreduce -- Do a reduction. |
1436 `-----------------------------*/
1437 yyreduce:
1438 /* yyn is the number of a rule to reduce with. */
1439 yylen = yyr2[yyn];
1440
1441 /* If YYLEN is nonzero, implement the default value of the action:
1442 `$$ = $1'.
1443
1444 Otherwise, the following line sets YYVAL to garbage.
1445 This behavior is undocumented and Bison
1446 users should not rely upon it. Assigning to YYVAL
1447 unconditionally makes the parser a bit smaller, and it avoids a
1448 GCC warning that YYVAL may be used uninitialized. */
1449 yyval = yyvsp[1-yylen];
1450
1451 ]b4_locations_if(
1452 [[ /* Default location. */
1453 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1454 YY_REDUCE_PRINT (yyn);
1455 switch (yyn)
1456 {
1457 ]b4_user_actions[
1458 default: break;
1459 }
1460 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1461
1462 YYPOPSTACK (yylen);
1463 yylen = 0;
1464 YY_STACK_PRINT (yyss, yyssp);
1465
1466 *++yyvsp = yyval;]b4_locations_if([
1467 *++yylsp = yyloc;])[
1468
1469 /* Now `shift' the result of the reduction. Determine what state
1470 that goes to, based on the state we popped back to and the rule
1471 number reduced by. */
1472
1473 yyn = yyr1[yyn];
1474
1475 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1476 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1477 yystate = yytable[yystate];
1478 else
1479 yystate = yydefgoto[yyn - YYNTOKENS];
1480
1481 goto yynewstate;
1482
1483
1484 /*------------------------------------.
1485 | yyerrlab -- here on detecting error |
1486 `------------------------------------*/
1487 yyerrlab:
1488 /* If not already recovering from an error, report this error. */
1489 if (!yyerrstatus)
1490 {
1491 ++yynerrs;
1492 #if ! YYERROR_VERBOSE
1493 yyerror (]b4_yyerror_args[YY_("syntax error"));
1494 #else
1495 {
1496 YYSIZE_T yysize = yysyntax_error (0, yystate, yychar);
1497 if (yymsg_alloc < yysize && yymsg_alloc < YYSTACK_ALLOC_MAXIMUM)
1498 {
1499 YYSIZE_T yyalloc = 2 * yysize;
1500 if (! (yysize <= yyalloc && yyalloc <= YYSTACK_ALLOC_MAXIMUM))
1501 yyalloc = YYSTACK_ALLOC_MAXIMUM;
1502 if (yymsg != yymsgbuf)
1503 YYSTACK_FREE (yymsg);
1504 yymsg = (char *) YYSTACK_ALLOC (yyalloc);
1505 if (yymsg)
1506 yymsg_alloc = yyalloc;
1507 else
1508 {
1509 yymsg = yymsgbuf;
1510 yymsg_alloc = sizeof yymsgbuf;
1511 }
1512 }
1513
1514 if (0 < yysize && yysize <= yymsg_alloc)
1515 {
1516 (void) yysyntax_error (yymsg, yystate, yychar);
1517 yyerror (]b4_yyerror_args[yymsg);
1518 }
1519 else
1520 {
1521 yyerror (]b4_yyerror_args[YY_("syntax error"));
1522 if (yysize != 0)
1523 goto yyexhaustedlab;
1524 }
1525 }
1526 #endif
1527 }
1528
1529 ]b4_locations_if([[ yyerror_range[0] = yylloc;]])[
1530
1531 if (yyerrstatus == 3)
1532 {
1533 /* If just tried and failed to reuse lookahead token after an
1534 error, discard it. */
1535
1536 if (yychar <= YYEOF)
1537 {
1538 /* Return failure if at end of input. */
1539 if (yychar == YYEOF)
1540 YYABORT;
1541 }
1542 else
1543 {
1544 yydestruct ("Error: discarding",
1545 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1546 yychar = YYEMPTY;
1547 }
1548 }
1549
1550 /* Else will try to reuse lookahead token after shifting the error
1551 token. */
1552 goto yyerrlab1;
1553
1554
1555 /*---------------------------------------------------.
1556 | yyerrorlab -- error raised explicitly by YYERROR. |
1557 `---------------------------------------------------*/
1558 yyerrorlab:
1559
1560 /* Pacify compilers like GCC when the user code never invokes
1561 YYERROR and the label yyerrorlab therefore never appears in user
1562 code. */
1563 if (/*CONSTCOND*/ 0)
1564 goto yyerrorlab;
1565
1566 ]b4_locations_if([[ yyerror_range[0] = yylsp[1-yylen];
1567 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1568 this YYERROR. */
1569 YYPOPSTACK (yylen);
1570 yylen = 0;
1571 YY_STACK_PRINT (yyss, yyssp);
1572 yystate = *yyssp;
1573 goto yyerrlab1;
1574
1575
1576 /*-------------------------------------------------------------.
1577 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1578 `-------------------------------------------------------------*/
1579 yyerrlab1:
1580 yyerrstatus = 3; /* Each real token shifted decrements this. */
1581
1582 for (;;)
1583 {
1584 yyn = yypact[yystate];
1585 if (yyn != YYPACT_NINF)
1586 {
1587 yyn += YYTERROR;
1588 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1589 {
1590 yyn = yytable[yyn];
1591 if (0 < yyn)
1592 break;
1593 }
1594 }
1595
1596 /* Pop the current state because it cannot handle the error token. */
1597 if (yyssp == yyss)
1598 YYABORT;
1599
1600 ]b4_locations_if([[ yyerror_range[0] = *yylsp;]])[
1601 yydestruct ("Error: popping",
1602 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1603 YYPOPSTACK (1);
1604 yystate = *yyssp;
1605 YY_STACK_PRINT (yyss, yyssp);
1606 }
1607
1608 *++yyvsp = yylval;
1609 ]b4_locations_if([[
1610 yyerror_range[1] = yylloc;
1611 /* Using YYLLOC is tempting, but would change the location of
1612 the lookahead. YYLOC is available though. */
1613 YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
1614 *++yylsp = yyloc;]])[
1615
1616 /* Shift the error token. */
1617 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1618
1619 yystate = yyn;
1620 goto yynewstate;
1621
1622
1623 /*-------------------------------------.
1624 | yyacceptlab -- YYACCEPT comes here. |
1625 `-------------------------------------*/
1626 yyacceptlab:
1627 yyresult = 0;
1628 goto yyreturn;
1629
1630 /*-----------------------------------.
1631 | yyabortlab -- YYABORT comes here. |
1632 `-----------------------------------*/
1633 yyabortlab:
1634 yyresult = 1;
1635 goto yyreturn;
1636
1637 #if !defined(yyoverflow) || YYERROR_VERBOSE
1638 /*-------------------------------------------------.
1639 | yyexhaustedlab -- memory exhaustion comes here. |
1640 `-------------------------------------------------*/
1641 yyexhaustedlab:
1642 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1643 yyresult = 2;
1644 /* Fall through. */
1645 #endif
1646
1647 yyreturn:
1648 if (yychar != YYEMPTY)
1649 yydestruct ("Cleanup: discarding lookahead",
1650 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1651 /* Do not reclaim the symbols of the rule which action triggered
1652 this YYABORT or YYACCEPT. */
1653 YYPOPSTACK (yylen);
1654 YY_STACK_PRINT (yyss, yyssp);
1655 while (yyssp != yyss)
1656 {
1657 yydestruct ("Cleanup: popping",
1658 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1659 YYPOPSTACK (1);
1660 }
1661 #ifndef yyoverflow
1662 if (yyss != yyssa)
1663 YYSTACK_FREE (yyss);
1664 #endif
1665 ]b4_push_if([[ yyps->yynew = 1;
1666
1667 yypushreturn:
1668 ]])[#if YYERROR_VERBOSE
1669 if (yymsg != yymsgbuf)
1670 YYSTACK_FREE (yymsg);
1671 #endif
1672 /* Make sure YYID is used. */
1673 return YYID (yyresult);
1674 }
1675
1676
1677 ]b4_epilogue
1678 b4_defines_if(
1679 [@output(b4_spec_defines_file@)@
1680 b4_copyright([Interface for Bison's Yacc-like parsers in C])dnl'
1681
1682 b4_percent_code_get([[requires]])[]dnl
1683
1684 b4_token_enums_defines(b4_tokens)
1685
1686 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
1687 ]m4_ifdef([b4_stype],
1688 [[typedef union ]b4_union_name[
1689 {
1690 ]b4_user_stype[
1691 } YYSTYPE;
1692 # define YYSTYPE_IS_TRIVIAL 1]],
1693 [m4_if(b4_tag_seen_flag, 0,
1694 [[typedef int YYSTYPE;
1695 # define YYSTYPE_IS_TRIVIAL 1]])])[
1696 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
1697 # define YYSTYPE_IS_DECLARED 1
1698 #endif
1699
1700 ]b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;]])
1701
1702 b4_locations_if(
1703 [#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
1704 typedef struct YYLTYPE
1705 {
1706 int first_line;
1707 int first_column;
1708 int last_line;
1709 int last_column;
1710 } YYLTYPE;
1711 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
1712 # define YYLTYPE_IS_DECLARED 1
1713 # define YYLTYPE_IS_TRIVIAL 1
1714 #endif
1715
1716 ]b4_pure_if([], [[extern YYLTYPE ]b4_prefix[lloc;]])
1717 )dnl b4_locations_if
1718 b4_push_if([[
1719 #ifndef YYPUSH_DECLS
1720 # define YYPUSH_DECLS
1721 struct ]b4_prefix[pstate;
1722 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
1723 enum { YYPUSH_MORE = 4 };
1724 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
1725 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
1726 [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([,
1727 [[[int yypushed_char]], [[yypushed_char]]],
1728 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1729 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1730 b4_parse_param]))
1731 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
1732 [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1733 b4_parse_param]))])
1734 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
1735 [[[void]], []])
1736 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
1737 [[b4_prefix[pstate *yyps]], [[yyps]]])[
1738 #endif
1739 ]])
1740 b4_percent_code_get([[provides]])[]dnl
1741 ])dnl b4_defines_if
1742 m4_divert_pop(0)
1743 m4_popdef([b4_copyright_years])
bison