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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, 2008-2009 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 3 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, see <http://www.gnu.org/licenses/>.
20
21 # Check the value of %define api.push_pull.
22 b4_percent_define_default([[api.push_pull]], [[pull]])
23 b4_percent_define_check_values([[[[api.push_pull]],
24 [[pull]], [[push]], [[both]]]])
25 b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
26 b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])
27 m4_case(b4_percent_define_get([[api.push_pull]]),
28 [pull], [m4_define([b4_push_flag], [[0]])],
29 [push], [m4_define([b4_pull_flag], [[0]])])
30
31 # Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing
32 # tests function as written, don't let BISON_USE_PUSH_FOR_PULL modify Bison's
33 # behavior at all when push parsing is already requested.
34 b4_define_flag_if([use_push_for_pull])
35 b4_use_push_for_pull_if([
36 b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])],
37 [m4_define([b4_push_flag], [[1]])])])
38
39 m4_include(b4_pkgdatadir/[c.m4])
40
41 ## ---------------- ##
42 ## Default values. ##
43 ## ---------------- ##
44
45 # Stack parameters.
46 m4_define_default([b4_stack_depth_max], [10000])
47 m4_define_default([b4_stack_depth_init], [200])
48
49
50 ## ------------------------ ##
51 ## Pure/impure interfaces. ##
52 ## ------------------------ ##
53
54 b4_percent_define_default([[api.pure]], [[false]])
55 b4_define_flag_if([pure])
56 m4_define([b4_pure_flag],
57 [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])
58
59 # b4_yacc_pure_if(IF-TRUE, IF-FALSE)
60 # ----------------------------------
61 # Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
62 m4_define([b4_yacc_pure_if],
63 [b4_pure_if([m4_ifset([b4_parse_param],
64 [$1], [$2])],
65 [$2])])
66
67
68 # b4_yyerror_args
69 # ---------------
70 # Arguments passed to yyerror: user args plus yylloc.
71 m4_define([b4_yyerror_args],
72 [b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
73 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
74
75
76 # b4_lex_param
77 # ------------
78 # Accumulate in b4_lex_param all the yylex arguments.
79 # b4_lex_param arrives quoted twice, but we want to keep only one level.
80 m4_define([b4_lex_param],
81 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
82 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
83 m4_ifdef([b4_lex_param], b4_lex_param)))
84
85
86 ## ------------ ##
87 ## Data Types. ##
88 ## ------------ ##
89
90 # b4_int_type(MIN, MAX)
91 # ---------------------
92 # Return the smallest int type able to handle numbers ranging from
93 # MIN to MAX (included). Overwrite the version from c.m4, which
94 # uses only C89 types, so that the user can override the shorter
95 # types, and so that pre-C89 compilers are handled correctly.
96 m4_define([b4_int_type],
97 [m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8],
98 b4_ints_in($@, [-128], [127]), [1], [yytype_int8],
99
100 b4_ints_in($@, [0], [65535]), [1], [yytype_uint16],
101 b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
102
103 m4_eval([0 <= $1]), [1], [unsigned int],
104
105 [int])])
106
107
108 ## ----------------- ##
109 ## Semantic Values. ##
110 ## ----------------- ##
111
112
113 # b4_lhs_value([TYPE])
114 # --------------------
115 # Expansion of $<TYPE>$.
116 m4_define([b4_lhs_value],
117 [(yyval[]m4_ifval([$1], [.$1]))])
118
119
120 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
121 # --------------------------------------
122 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
123 # symbols on RHS.
124 m4_define([b4_rhs_value],
125 [(yyvsp@{($2) - ($1)@}m4_ifval([$3], [.$3]))])
126
127
128
129 ## ----------- ##
130 ## Locations. ##
131 ## ----------- ##
132
133 # b4_lhs_location()
134 # -----------------
135 # Expansion of @$.
136 m4_define([b4_lhs_location],
137 [(yyloc)])
138
139
140 # b4_rhs_location(RULE-LENGTH, NUM)
141 # ---------------------------------
142 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
143 # on RHS.
144 m4_define([b4_rhs_location],
145 [(yylsp@{($2) - ($1)@})])
146
147
148
149 ## --------------------------------------------------------- ##
150 ## Defining symbol actions, e.g., printers and destructors. ##
151 ## --------------------------------------------------------- ##
152
153 # We do want M4 expansion after # for CPP macros.
154 m4_changecom()
155 m4_divert_push(0)dnl
156 @output(b4_parser_file_name@)@
157 b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],
158 [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005,
159 2006, 2009])[
160
161 /* C LALR(1) parser skeleton written by Richard Stallman, by
162 simplifying the original so-called "semantic" parser. */
163
164 /* All symbols defined below should begin with yy or YY, to avoid
165 infringing on user name space. This should be done even for local
166 variables, as they might otherwise be expanded by user macros.
167 There are some unavoidable exceptions within include files to
168 define necessary library symbols; they are noted "INFRINGES ON
169 USER NAME SPACE" below. */
170
171 ]b4_identification
172 b4_percent_code_get([[top]])[]dnl
173 m4_if(b4_prefix, [yy], [],
174 [[/* Substitute the variable and function names. */
175 ]b4_pull_if([[#define yyparse ]b4_prefix[parse
176 ]])b4_push_if([[#define yypush_parse ]b4_prefix[push_parse
177 ]b4_pull_if([[#define yypull_parse ]b4_prefix[pull_parse
178 ]])[#define yypstate_new ]b4_prefix[pstate_new
179 #define yypstate_delete ]b4_prefix[pstate_delete
180 #define yypstate ]b4_prefix[pstate
181 ]])[#define yylex ]b4_prefix[lex
182 #define yyerror ]b4_prefix[error
183 #define yylval ]b4_prefix[lval
184 #define yychar ]b4_prefix[char
185 #define yydebug ]b4_prefix[debug
186 #define yynerrs ]b4_prefix[nerrs
187 ]b4_locations_if([[#define yylloc ]b4_prefix[lloc]])])[
188
189 /* Copy the first part of user declarations. */
190 ]b4_user_pre_prologue[
191
192 /* Enabling traces. */
193 #ifndef YYDEBUG
194 # define YYDEBUG ]b4_debug_flag[
195 #endif
196
197 /* Enabling verbose error messages. */
198 #ifdef YYERROR_VERBOSE
199 # undef YYERROR_VERBOSE
200 # define YYERROR_VERBOSE 1
201 #else
202 # define YYERROR_VERBOSE ]b4_error_verbose_flag[
203 #endif
204
205 /* Enabling the token table. */
206 #ifndef YYTOKEN_TABLE
207 # define YYTOKEN_TABLE ]b4_token_table[
208 #endif
209
210 ]b4_percent_code_get([[requires]])[]dnl
211
212 b4_token_enums_defines(b4_tokens)[
213
214 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
215 ]m4_ifdef([b4_stype],
216 [[typedef union ]b4_union_name[
217 {
218 ]b4_user_stype[
219 } YYSTYPE;
220 # define YYSTYPE_IS_TRIVIAL 1]],
221 [m4_if(b4_tag_seen_flag, 0,
222 [[typedef int YYSTYPE;
223 # define YYSTYPE_IS_TRIVIAL 1]])])[
224 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
225 # define YYSTYPE_IS_DECLARED 1
226 #endif]b4_locations_if([[
227
228 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
229 typedef struct YYLTYPE
230 {
231 int first_line;
232 int first_column;
233 int last_line;
234 int last_column;
235 } YYLTYPE;
236 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
237 # define YYLTYPE_IS_DECLARED 1
238 # define YYLTYPE_IS_TRIVIAL 1
239 #endif]])b4_push_if([[
240
241 #ifndef YYPUSH_DECLS
242 # define YYPUSH_DECLS
243 struct yypstate;
244 typedef struct yypstate yypstate;
245 enum { YYPUSH_MORE = 4 };
246
247 ]b4_pull_if([b4_c_function_decl([[yyparse]], [[int]], b4_parse_param)
248 ])b4_c_function_decl([[yypush_parse]], [[int]],
249 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
250 [[[int yypushed_char]], [[yypushed_char]]],
251 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
252 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
253 b4_parse_param]))
254 b4_pull_if([b4_c_function_decl([[yypull_parse]], [[int]],
255 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
256 b4_parse_param]))])
257 b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []])
258 b4_c_function_decl([[yypstate_delete]], [[void]],
259 [[[yypstate *yyps]], [[yyps]]])[
260 #endif]])
261
262 b4_percent_code_get([[provides]])[]dnl
263
264 [/* Copy the second part of user declarations. */
265 ]b4_user_post_prologue
266 b4_percent_code_get[]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 defined YYENABLE_NLS && 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 ]b4_push_if([],
345 [[/* The parser invokes alloca or malloc; define the necessary symbols. */
346
347 # ifdef YYSTACK_USE_ALLOCA
348 # if YYSTACK_USE_ALLOCA
349 # ifdef __GNUC__
350 # define YYSTACK_ALLOC __builtin_alloca
351 # elif defined __BUILTIN_VA_ARG_INCR
352 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
353 # elif defined _AIX
354 # define YYSTACK_ALLOC __alloca
355 # elif defined _MSC_VER
356 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
357 # define alloca _alloca
358 # else
359 # define YYSTACK_ALLOC alloca
360 # if ! defined _ALLOCA_H && ! defined _STDLIB_H && ]b4_c_modern[
361 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
362 # ifndef _STDLIB_H
363 # define _STDLIB_H 1
364 # endif
365 # endif
366 # endif
367 # endif
368 # endif
369
370 ]])dnl
371 [# ifdef YYSTACK_ALLOC
372 /* Pacify GCC's `empty if-body' warning. */
373 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
374 # ifndef YYSTACK_ALLOC_MAXIMUM
375 /* The OS might guarantee only one guard page at the bottom of the stack,
376 and a page size can be as small as 4096 bytes. So we cannot safely
377 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
378 to allow for a few compiler-allocated temporary stack slots. */
379 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
380 # endif
381 # else
382 # define YYSTACK_ALLOC YYMALLOC
383 # define YYSTACK_FREE YYFREE
384 # ifndef YYSTACK_ALLOC_MAXIMUM
385 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
386 # endif
387 # if (defined __cplusplus && ! defined _STDLIB_H \
388 && ! ((defined YYMALLOC || defined malloc) \
389 && (defined YYFREE || defined free)))
390 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
391 # ifndef _STDLIB_H
392 # define _STDLIB_H 1
393 # endif
394 # endif
395 # ifndef YYMALLOC
396 # define YYMALLOC malloc
397 # if ! defined malloc && ! defined _STDLIB_H && ]b4_c_modern[
398 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
399 # endif
400 # endif
401 # ifndef YYFREE
402 # define YYFREE free
403 # if ! defined free && ! defined _STDLIB_H && ]b4_c_modern[
404 void free (void *); /* INFRINGES ON USER NAME SPACE */
405 # endif
406 # endif
407 # endif
408 #endif /* ! defined yyoverflow || YYERROR_VERBOSE */
409
410
411 #if (! defined yyoverflow \
412 && (! defined __cplusplus \
413 || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
414 && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
415
416 /* A type that is properly aligned for any stack member. */
417 union yyalloc
418 {
419 yytype_int16 yyss_alloc;
420 YYSTYPE yyvs_alloc;]b4_locations_if([
421 YYLTYPE yyls_alloc;])[
422 };
423
424 /* The size of the maximum gap between one aligned stack and the next. */
425 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
426
427 /* The size of an array large to enough to hold all stacks, each with
428 N elements. */
429 ]b4_locations_if(
430 [# define YYSTACK_BYTES(N) \
431 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
432 + 2 * YYSTACK_GAP_MAXIMUM)],
433 [# define YYSTACK_BYTES(N) \
434 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
435 + YYSTACK_GAP_MAXIMUM)])[
436
437 /* Copy COUNT objects from FROM to TO. The source and destination do
438 not overlap. */
439 # ifndef YYCOPY
440 # if defined __GNUC__ && 1 < __GNUC__
441 # define YYCOPY(To, From, Count) \
442 __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
443 # else
444 # define YYCOPY(To, From, Count) \
445 do \
446 { \
447 YYSIZE_T yyi; \
448 for (yyi = 0; yyi < (Count); yyi++) \
449 (To)[yyi] = (From)[yyi]; \
450 } \
451 while (YYID (0))
452 # endif
453 # endif
454
455 /* Relocate STACK from its old location to the new one. The
456 local variables YYSIZE and YYSTACKSIZE give the old and new number of
457 elements in the stack, and YYPTR gives the new location of the
458 stack. Advance YYPTR to a properly aligned location for the next
459 stack. */
460 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
461 do \
462 { \
463 YYSIZE_T yynewbytes; \
464 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
465 Stack = &yyptr->Stack_alloc; \
466 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
467 yyptr += yynewbytes / sizeof (*yyptr); \
468 } \
469 while (YYID (0))
470
471 #endif
472
473 /* YYFINAL -- State number of the termination state. */
474 #define YYFINAL ]b4_final_state_number[
475 /* YYLAST -- Last index in YYTABLE. */
476 #define YYLAST ]b4_last[
477
478 /* YYNTOKENS -- Number of terminals. */
479 #define YYNTOKENS ]b4_tokens_number[
480 /* YYNNTS -- Number of nonterminals. */
481 #define YYNNTS ]b4_nterms_number[
482 /* YYNRULES -- Number of rules. */
483 #define YYNRULES ]b4_rules_number[
484 /* YYNRULES -- Number of states. */
485 #define YYNSTATES ]b4_states_number[
486
487 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
488 #define YYUNDEFTOK ]b4_undef_token_number[
489 #define YYMAXUTOK ]b4_user_token_number_max[
490
491 #define YYTRANSLATE(YYX) \
492 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
493
494 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */
495 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
496 {
497 ]b4_translate[
498 };
499
500 #if YYDEBUG
501 /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
502 YYRHS. */
503 static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
504 {
505 ]b4_prhs[
506 };
507
508 /* YYRHS -- A `-1'-separated list of the rules' RHS. */
509 static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
510 {
511 ]b4_rhs[
512 };
513
514 /* YYRLINE[YYN] -- source line where rule number YYN was defined. */
515 static const ]b4_int_type_for([b4_rline])[ yyrline[] =
516 {
517 ]b4_rline[
518 };
519 #endif
520
521 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
522 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
523 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
524 static const char *const yytname[] =
525 {
526 ]b4_tname[
527 };
528 #endif
529
530 # ifdef YYPRINT
531 /* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
532 token YYLEX-NUM. */
533 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
534 {
535 ]b4_toknum[
536 };
537 # endif
538
539 /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
540 static const ]b4_int_type_for([b4_r1])[ yyr1[] =
541 {
542 ]b4_r1[
543 };
544
545 /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */
546 static const ]b4_int_type_for([b4_r2])[ yyr2[] =
547 {
548 ]b4_r2[
549 };
550
551 /* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state
552 STATE-NUM when YYTABLE doesn't specify something else to do. Zero
553 means the default is an error. */
554 static const ]b4_int_type_for([b4_defact])[ yydefact[] =
555 {
556 ]b4_defact[
557 };
558
559 /* YYDEFGOTO[NTERM-NUM]. */
560 static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
561 {
562 ]b4_defgoto[
563 };
564
565 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
566 STATE-NUM. */
567 #define YYPACT_NINF ]b4_pact_ninf[
568 static const ]b4_int_type_for([b4_pact])[ yypact[] =
569 {
570 ]b4_pact[
571 };
572
573 /* YYPGOTO[NTERM-NUM]. */
574 static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] =
575 {
576 ]b4_pgoto[
577 };
578
579 /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If
580 positive, shift that token. If negative, reduce the rule which
581 number is the opposite. If zero, do what YYDEFACT says.
582 If YYTABLE_NINF, syntax error. */
583 #define YYTABLE_NINF ]b4_table_ninf[
584 static const ]b4_int_type_for([b4_table])[ yytable[] =
585 {
586 ]b4_table[
587 };
588
589 static const ]b4_int_type_for([b4_check])[ yycheck[] =
590 {
591 ]b4_check[
592 };
593
594 /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
595 symbol of state STATE-NUM. */
596 static const ]b4_int_type_for([b4_stos])[ yystos[] =
597 {
598 ]b4_stos[
599 };
600
601 #define yyerrok (yyerrstatus = 0)
602 #define yyclearin (yychar = YYEMPTY)
603 #define YYEMPTY (-2)
604 #define YYEOF 0
605
606 #define YYACCEPT goto yyacceptlab
607 #define YYABORT goto yyabortlab
608 #define YYERROR goto yyerrorlab
609
610
611 /* Like YYERROR except do call yyerror. This remains here temporarily
612 to ease the transition to the new meaning of YYERROR, for GCC.
613 Once GCC version 2 has supplanted version 1, this can go. However,
614 YYFAIL appears to be in use. Nevertheless, it is formally deprecated
615 in Bison 2.4.2's NEWS entry, where a plan to phase it out is
616 discussed. */
617
618 #define YYFAIL goto yyerrlab
619 #if defined YYFAIL
620 /* This is here to suppress warnings from the GCC cpp's
621 -Wunused-macros. Normally we don't worry about that warning, but
622 some users do, and we want to make it easy for users to remove
623 YYFAIL uses, which will produce warnings from Bison 2.5. */
624 #endif
625
626 #define YYRECOVERING() (!!yyerrstatus)
627
628 #define YYBACKUP(Token, Value) \
629 do \
630 if (yychar == YYEMPTY && yylen == 1) \
631 { \
632 yychar = (Token); \
633 yylval = (Value); \
634 yytoken = YYTRANSLATE (yychar); \
635 YYPOPSTACK (1); \
636 goto yybackup; \
637 } \
638 else \
639 { \
640 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
641 YYERROR; \
642 } \
643 while (YYID (0))
644
645
646 #define YYTERROR 1
647 #define YYERRCODE 256
648
649
650 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
651 If N is 0, then set CURRENT to the empty location which ends
652 the previous symbol: RHS[0] (always defined). */
653
654 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
655 #ifndef YYLLOC_DEFAULT
656 # define YYLLOC_DEFAULT(Current, Rhs, N) \
657 do \
658 if (YYID (N)) \
659 { \
660 (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
661 (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
662 (Current).last_line = YYRHSLOC (Rhs, N).last_line; \
663 (Current).last_column = YYRHSLOC (Rhs, N).last_column; \
664 } \
665 else \
666 { \
667 (Current).first_line = (Current).last_line = \
668 YYRHSLOC (Rhs, 0).last_line; \
669 (Current).first_column = (Current).last_column = \
670 YYRHSLOC (Rhs, 0).last_column; \
671 } \
672 while (YYID (0))
673 #endif
674
675
676 /* YY_LOCATION_PRINT -- Print the location on the stream.
677 This macro was not mandated originally: define only if we know
678 we won't break user code: when these are the locations we know. */
679
680 #ifndef YY_LOCATION_PRINT
681 # if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
682 # define YY_LOCATION_PRINT(File, Loc) \
683 fprintf (File, "%d.%d-%d.%d", \
684 (Loc).first_line, (Loc).first_column, \
685 (Loc).last_line, (Loc).last_column)
686 # else
687 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
688 # endif
689 #endif
690
691
692 /* YYLEX -- calling `yylex' with the right arguments. */
693
694 #ifdef YYLEX_PARAM
695 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
696 #else
697 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
698 #endif
699
700 /* Enable debugging if requested. */
701 #if YYDEBUG
702
703 # ifndef YYFPRINTF
704 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
705 # define YYFPRINTF fprintf
706 # endif
707
708 # define YYDPRINTF(Args) \
709 do { \
710 if (yydebug) \
711 YYFPRINTF Args; \
712 } while (YYID (0))
713
714 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
715 do { \
716 if (yydebug) \
717 { \
718 YYFPRINTF (stderr, "%s ", Title); \
719 yy_symbol_print (stderr, \
720 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
721 YYFPRINTF (stderr, "\n"); \
722 } \
723 } while (YYID (0))
724
725 ]b4_yy_symbol_print_generate([b4_c_function_def])[
726
727 /*------------------------------------------------------------------.
728 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
729 | TOP (included). |
730 `------------------------------------------------------------------*/
731
732 ]b4_c_function_def([yy_stack_print], [static void],
733 [[yytype_int16 *yybottom], [yybottom]],
734 [[yytype_int16 *yytop], [yytop]])[
735 {
736 YYFPRINTF (stderr, "Stack now");
737 for (; yybottom <= yytop; yybottom++)
738 {
739 int yybot = *yybottom;
740 YYFPRINTF (stderr, " %d", yybot);
741 }
742 YYFPRINTF (stderr, "\n");
743 }
744
745 # define YY_STACK_PRINT(Bottom, Top) \
746 do { \
747 if (yydebug) \
748 yy_stack_print ((Bottom), (Top)); \
749 } while (YYID (0))
750
751
752 /*------------------------------------------------.
753 | Report that the YYRULE is going to be reduced. |
754 `------------------------------------------------*/
755
756 ]b4_c_function_def([yy_reduce_print], [static void],
757 [[YYSTYPE *yyvsp], [yyvsp]],
758 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
759 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
760 b4_parse_param]))[
761 {
762 int yynrhs = yyr2[yyrule];
763 int yyi;
764 unsigned long int yylno = yyrline[yyrule];
765 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
766 yyrule - 1, yylno);
767 /* The symbols being reduced. */
768 for (yyi = 0; yyi < yynrhs; yyi++)
769 {
770 YYFPRINTF (stderr, " $%d = ", yyi + 1);
771 yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
772 &]b4_rhs_value(yynrhs, yyi + 1)[
773 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
774 b4_user_args[);
775 YYFPRINTF (stderr, "\n");
776 }
777 }
778
779 # define YY_REDUCE_PRINT(Rule) \
780 do { \
781 if (yydebug) \
782 yy_reduce_print (yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
783 } while (YYID (0))
784
785 /* Nonzero means print parse trace. It is left uninitialized so that
786 multiple parsers can coexist. */
787 int yydebug;
788 #else /* !YYDEBUG */
789 # define YYDPRINTF(Args)
790 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
791 # define YY_STACK_PRINT(Bottom, Top)
792 # define YY_REDUCE_PRINT(Rule)
793 #endif /* !YYDEBUG */
794
795
796 /* YYINITDEPTH -- initial size of the parser's stacks. */
797 #ifndef YYINITDEPTH
798 # define YYINITDEPTH ]b4_stack_depth_init[
799 #endif
800
801 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
802 if the built-in stack extension method is used).
803
804 Do not make this value too large; the results are undefined if
805 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
806 evaluated with infinite-precision integer arithmetic. */
807
808 #ifndef YYMAXDEPTH
809 # define YYMAXDEPTH ]b4_stack_depth_max[
810 #endif
811
812 \f
813
814 #if YYERROR_VERBOSE
815
816 # ifndef yystrlen
817 # if defined __GLIBC__ && defined _STRING_H
818 # define yystrlen strlen
819 # else
820 /* Return the length of YYSTR. */
821 ]b4_c_function_def([yystrlen], [static YYSIZE_T],
822 [[const char *yystr], [yystr]])[
823 {
824 YYSIZE_T yylen;
825 for (yylen = 0; yystr[yylen]; yylen++)
826 continue;
827 return yylen;
828 }
829 # endif
830 # endif
831
832 # ifndef yystpcpy
833 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
834 # define yystpcpy stpcpy
835 # else
836 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
837 YYDEST. */
838 ]b4_c_function_def([yystpcpy], [static char *],
839 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
840 {
841 char *yyd = yydest;
842 const char *yys = yysrc;
843
844 while ((*yyd++ = *yys++) != '\0')
845 continue;
846
847 return yyd - 1;
848 }
849 # endif
850 # endif
851
852 # ifndef yytnamerr
853 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
854 quotes and backslashes, so that it's suitable for yyerror. The
855 heuristic is that double-quoting is unnecessary unless the string
856 contains an apostrophe, a comma, or backslash (other than
857 backslash-backslash). YYSTR is taken from yytname. If YYRES is
858 null, do not copy; instead, return the length of what the result
859 would have been. */
860 static YYSIZE_T
861 yytnamerr (char *yyres, const char *yystr)
862 {
863 if (*yystr == '"')
864 {
865 YYSIZE_T yyn = 0;
866 char const *yyp = yystr;
867
868 for (;;)
869 switch (*++yyp)
870 {
871 case '\'':
872 case ',':
873 goto do_not_strip_quotes;
874
875 case '\\':
876 if (*++yyp != '\\')
877 goto do_not_strip_quotes;
878 /* Fall through. */
879 default:
880 if (yyres)
881 yyres[yyn] = *yyp;
882 yyn++;
883 break;
884
885 case '"':
886 if (yyres)
887 yyres[yyn] = '\0';
888 return yyn;
889 }
890 do_not_strip_quotes: ;
891 }
892
893 if (! yyres)
894 return yystrlen (yystr);
895
896 return yystpcpy (yyres, yystr) - yyres;
897 }
898 # endif
899
900 /* Copy into YYRESULT an error message about the unexpected token
901 YYCHAR while in state YYSTATE. Return the number of bytes copied,
902 including the terminating null byte. If YYRESULT is null, do not
903 copy anything; just return the number of bytes that would be
904 copied. As a special case, return 0 if an ordinary "syntax error"
905 message will do. Return YYSIZE_MAXIMUM if overflow occurs during
906 size calculation. */
907 static YYSIZE_T
908 yysyntax_error (char *yyresult, int yystate, int yychar)
909 {
910 int yyn = yypact[yystate];
911
912 if (! (YYPACT_NINF < yyn && yyn <= YYLAST))
913 return 0;
914 else
915 {
916 int yytype = YYTRANSLATE (yychar);
917 YYSIZE_T yysize0 = yytnamerr (0, yytname[yytype]);
918 YYSIZE_T yysize = yysize0;
919 YYSIZE_T yysize1;
920 int yysize_overflow = 0;
921 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
922 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
923 int yyx;
924
925 # if 0
926 /* This is so xgettext sees the translatable formats that are
927 constructed on the fly. */
928 YY_("syntax error, unexpected %s");
929 YY_("syntax error, unexpected %s, expecting %s");
930 YY_("syntax error, unexpected %s, expecting %s or %s");
931 YY_("syntax error, unexpected %s, expecting %s or %s or %s");
932 YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s");
933 # endif
934 char *yyfmt;
935 char const *yyf;
936 static char const yyunexpected[] = "syntax error, unexpected %s";
937 static char const yyexpecting[] = ", expecting %s";
938 static char const yyor[] = " or %s";
939 char yyformat[sizeof yyunexpected
940 + sizeof yyexpecting - 1
941 + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
942 * (sizeof yyor - 1))];
943 char const *yyprefix = yyexpecting;
944
945 /* Start YYX at -YYN if negative to avoid negative indexes in
946 YYCHECK. */
947 int yyxbegin = yyn < 0 ? -yyn : 0;
948
949 /* Stay within bounds of both yycheck and yytname. */
950 int yychecklim = YYLAST - yyn + 1;
951 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
952 int yycount = 1;
953
954 yyarg[0] = yytname[yytype];
955 yyfmt = yystpcpy (yyformat, yyunexpected);
956
957 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
958 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
959 {
960 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
961 {
962 yycount = 1;
963 yysize = yysize0;
964 yyformat[sizeof yyunexpected - 1] = '\0';
965 break;
966 }
967 yyarg[yycount++] = yytname[yyx];
968 yysize1 = yysize + yytnamerr (0, yytname[yyx]);
969 yysize_overflow |= (yysize1 < yysize);
970 yysize = yysize1;
971 yyfmt = yystpcpy (yyfmt, yyprefix);
972 yyprefix = yyor;
973 }
974
975 yyf = YY_(yyformat);
976 yysize1 = yysize + yystrlen (yyf);
977 yysize_overflow |= (yysize1 < yysize);
978 yysize = yysize1;
979
980 if (yysize_overflow)
981 return YYSIZE_MAXIMUM;
982
983 if (yyresult)
984 {
985 /* Avoid sprintf, as that infringes on the user's name space.
986 Don't have undefined behavior even if the translation
987 produced a string with the wrong number of "%s"s. */
988 char *yyp = yyresult;
989 int yyi = 0;
990 while ((*yyp = *yyf) != '\0')
991 {
992 if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
993 {
994 yyp += yytnamerr (yyp, yyarg[yyi++]);
995 yyf += 2;
996 }
997 else
998 {
999 yyp++;
1000 yyf++;
1001 }
1002 }
1003 }
1004 return yysize;
1005 }
1006 }
1007 #endif /* YYERROR_VERBOSE */
1008 \f
1009
1010 ]b4_yydestruct_generate([b4_c_function_def])[
1011
1012 ]b4_push_if([],
1013 [[/* Prevent warnings from -Wmissing-prototypes. */
1014 #ifdef YYPARSE_PARAM
1015 ]b4_c_function_decl([yyparse], [int],
1016 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1017 #else /* ! YYPARSE_PARAM */
1018 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[
1019 #endif /* ! YYPARSE_PARAM */]])
1020
1021 m4_divert_push([KILL])# ======================== M4 code.
1022 # b4_declare_scanner_communication_variables
1023 # ------------------------------------------
1024 # Declare the variables that are global, or local to YYPARSE if
1025 # pure-parser.
1026 m4_define([b4_declare_scanner_communication_variables],
1027 [[/* The lookahead symbol. */
1028 int yychar;
1029
1030 /* The semantic value of the lookahead symbol. */
1031 YYSTYPE yylval;
1032 ]b4_locations_if([[
1033 /* Location data for the lookahead symbol. */
1034 YYLTYPE yylloc;
1035 ]])b4_pure_if([], [[
1036 /* Number of syntax errors so far. */
1037 int yynerrs;
1038 ]])])
1039
1040 # b4_declare_parser_state_variables
1041 # ---------------------------------
1042 # Declare all the variables that are needed to maintain the parser state
1043 # between calls to yypush_parse.
1044 m4_define([b4_declare_parser_state_variables],
1045 [b4_pure_if([[ /* Number of syntax errors so far. */
1046 int yynerrs;
1047 ]])[
1048 int yystate;
1049 /* Number of tokens to shift before error messages enabled. */
1050 int yyerrstatus;
1051
1052 /* The stacks and their tools:
1053 `yyss': related to states.
1054 `yyvs': related to semantic values.]b4_locations_if([[
1055 `yyls': related to locations.]])[
1056
1057 Refer to the stacks thru separate pointers, to allow yyoverflow
1058 to reallocate them elsewhere. */
1059
1060 /* The state stack. */
1061 yytype_int16 yyssa[YYINITDEPTH];
1062 yytype_int16 *yyss;
1063 yytype_int16 *yyssp;
1064
1065 /* The semantic value stack. */
1066 YYSTYPE yyvsa[YYINITDEPTH];
1067 YYSTYPE *yyvs;
1068 YYSTYPE *yyvsp;
1069 ]b4_locations_if([[
1070 /* The location stack. */
1071 YYLTYPE yylsa[YYINITDEPTH];
1072 YYLTYPE *yyls;
1073 YYLTYPE *yylsp;
1074
1075 /* The locations where the error started and ended. */
1076 YYLTYPE yyerror_range[2];
1077 ]])[
1078 YYSIZE_T yystacksize;
1079 ]])
1080
1081 m4_divert_pop([KILL])dnl# ====================== End of M4 code.
1082
1083 b4_pure_if([], [b4_declare_scanner_communication_variables])
1084
1085 b4_push_if(
1086 [[struct yypstate
1087 {
1088 ]b4_declare_parser_state_variables[
1089 /* Used to determine if this is the first time this instance has
1090 been used. */
1091 int yynew;
1092 };]b4_pure_if([], [[
1093
1094 static char yypstate_allocated = 0;]])b4_pull_if([
1095
1096 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
1097 {
1098 return yypull_parse (0]m4_ifset([b4_parse_param],
1099 [[, ]b4_c_args(b4_parse_param)])[);
1100 }
1101
1102 ]b4_c_function_def([[yypull_parse]], [[int]],
1103 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1104 b4_parse_param]))[
1105 {
1106 int yystatus;
1107 yypstate *yyps_local;]b4_pure_if([[
1108 int yychar;
1109 YYSTYPE yylval;]b4_locations_if([[
1110 YYLTYPE yylloc;]])])[
1111 if (yyps == 0)
1112 {
1113 yyps_local = yypstate_new ();
1114 if (!yyps_local)
1115 {]b4_pure_if([[
1116 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1117 if (!yypstate_allocated)
1118 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1119 return 2;
1120 }
1121 }
1122 else
1123 yyps_local = yyps;
1124 do {
1125 yychar = YYLEX;
1126 yystatus =
1127 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
1128 } while (yystatus == YYPUSH_MORE);
1129 if (yyps == 0)
1130 yypstate_delete (yyps_local);
1131 return yystatus;
1132 }]])[
1133
1134 /* Initialize the parser data structure. */
1135 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
1136 {
1137 yypstate *yyps;]b4_pure_if([], [[
1138 if (yypstate_allocated)
1139 return 0;]])[
1140 yyps = (yypstate *) malloc (sizeof *yyps);
1141 if (!yyps)
1142 return 0;
1143 yyps->yynew = 1;]b4_pure_if([], [[
1144 yypstate_allocated = 1;]])[
1145 return yyps;
1146 }
1147
1148 ]b4_c_function_def([[yypstate_delete]], [[void]],
1149 [[[yypstate *yyps]], [[yyps]]])[
1150 {
1151 #ifndef yyoverflow
1152 /* If the stack was reallocated but the parse did not complete, then the
1153 stack still needs to be freed. */
1154 if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1155 YYSTACK_FREE (yyps->yyss);
1156 #endif
1157 free (yyps);]b4_pure_if([], [[
1158 yypstate_allocated = 0;]])[
1159 }
1160
1161 ]b4_pure_if([[#define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs
1162 ]])[#define yystate yyps->yystate
1163 #define yyerrstatus yyps->yyerrstatus
1164 #define yyssa yyps->yyssa
1165 #define yyss yyps->yyss
1166 #define yyssp yyps->yyssp
1167 #define yyvsa yyps->yyvsa
1168 #define yyvs yyps->yyvs
1169 #define yyvsp yyps->yyvsp
1170 ]b4_locations_if([[#define yylsa yyps->yylsa
1171 #define yyls yyps->yyls
1172 #define yylsp yyps->yylsp
1173 #define yyerror_range yyps->yyerror_range
1174 ]])[#define yystacksize yyps->yystacksize
1175 ]])[
1176 /*-------------------------.
1177 | yyparse or yypush_parse. |
1178 `-------------------------*/
1179 ]b4_push_if([
1180 b4_c_function_def([[yypush_parse]], [[int]],
1181 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1182 [[[int yypushed_char]], [[yypushed_char]]],
1183 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1184 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1185 b4_parse_param]))], [
1186 #ifdef YYPARSE_PARAM
1187 b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])
1188 #else /* ! YYPARSE_PARAM */
1189 b4_c_function_def([yyparse], [int], b4_parse_param)
1190 #endif])[
1191 {
1192 ]b4_pure_if([b4_declare_scanner_communication_variables])
1193 b4_push_if([b4_pure_if([], [[ int yypushed_char = yychar;
1194 YYSTYPE yypushed_val = yylval;
1195 ]b4_locations_if([[YYLTYPE yypushed_loc = yylloc;
1196 ]])])],
1197 [b4_declare_parser_state_variables])[
1198 int yyn;
1199 int yyresult;
1200 /* Lookahead token as an internal (translated) token number. */
1201 int yytoken;
1202 /* The variables used to return semantic value and location from the
1203 action routines. */
1204 YYSTYPE yyval;]b4_locations_if([[
1205 YYLTYPE yyloc;]])[
1206
1207 #if YYERROR_VERBOSE
1208 /* Buffer for error messages, and its allocated size. */
1209 char yymsgbuf[128];
1210 char *yymsg = yymsgbuf;
1211 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1212 #endif
1213
1214 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1215
1216 /* The number of symbols on the RHS of the reduced rule.
1217 Keep to zero when no symbol should be popped. */
1218 int yylen = 0;]b4_push_if([[
1219
1220 if (!yyps->yynew)
1221 {
1222 yyn = yypact[yystate];
1223 goto yyread_pushed_token;
1224 }]])[
1225
1226 yytoken = 0;
1227 yyss = yyssa;
1228 yyvs = yyvsa;]b4_locations_if([[
1229 yyls = yylsa;]])[
1230 yystacksize = YYINITDEPTH;
1231
1232 YYDPRINTF ((stderr, "Starting parse\n"));
1233
1234 yystate = 0;
1235 yyerrstatus = 0;
1236 yynerrs = 0;
1237 yychar = YYEMPTY; /* Cause a token to be read. */
1238
1239 /* Initialize stack pointers.
1240 Waste one element of value and location stack
1241 so that they stay on the same level as the state stack.
1242 The wasted elements are never initialized. */
1243 yyssp = yyss;
1244 yyvsp = yyvs;]b4_locations_if([[
1245 yylsp = yyls;
1246
1247 #if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
1248 /* Initialize the default location before parsing starts. */
1249 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1250 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1251 #endif]])
1252 m4_ifdef([b4_initial_action],[
1253 m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
1254 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
1255 /* User initialization code. */
1256 b4_user_initial_action
1257 m4_popdef([b4_dollar_dollar])dnl
1258 m4_popdef([b4_at_dollar])])dnl
1259 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1260 ]])dnl
1261 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1262 ]])[
1263 goto yysetstate;
1264
1265 /*------------------------------------------------------------.
1266 | yynewstate -- Push a new state, which is found in yystate. |
1267 `------------------------------------------------------------*/
1268 yynewstate:
1269 /* In all cases, when you get here, the value and location stacks
1270 have just been pushed. So pushing a state here evens the stacks. */
1271 yyssp++;
1272
1273 yysetstate:
1274 *yyssp = yystate;
1275
1276 if (yyss + yystacksize - 1 <= yyssp)
1277 {
1278 /* Get the current used size of the three stacks, in elements. */
1279 YYSIZE_T yysize = yyssp - yyss + 1;
1280
1281 #ifdef yyoverflow
1282 {
1283 /* Give user a chance to reallocate the stack. Use copies of
1284 these so that the &'s don't force the real ones into
1285 memory. */
1286 YYSTYPE *yyvs1 = yyvs;
1287 yytype_int16 *yyss1 = yyss;]b4_locations_if([
1288 YYLTYPE *yyls1 = yyls;])[
1289
1290 /* Each stack pointer address is followed by the size of the
1291 data in use in that stack, in bytes. This used to be a
1292 conditional around just the two extra args, but that might
1293 be undefined if yyoverflow is a macro. */
1294 yyoverflow (YY_("memory exhausted"),
1295 &yyss1, yysize * sizeof (*yyssp),
1296 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1297 &yyls1, yysize * sizeof (*yylsp),])[
1298 &yystacksize);
1299 ]b4_locations_if([
1300 yyls = yyls1;])[
1301 yyss = yyss1;
1302 yyvs = yyvs1;
1303 }
1304 #else /* no yyoverflow */
1305 # ifndef YYSTACK_RELOCATE
1306 goto yyexhaustedlab;
1307 # else
1308 /* Extend the stack our own way. */
1309 if (YYMAXDEPTH <= yystacksize)
1310 goto yyexhaustedlab;
1311 yystacksize *= 2;
1312 if (YYMAXDEPTH < yystacksize)
1313 yystacksize = YYMAXDEPTH;
1314
1315 {
1316 yytype_int16 *yyss1 = yyss;
1317 union yyalloc *yyptr =
1318 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1319 if (! yyptr)
1320 goto yyexhaustedlab;
1321 YYSTACK_RELOCATE (yyss_alloc, yyss);
1322 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1323 YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1324 # undef YYSTACK_RELOCATE
1325 if (yyss1 != yyssa)
1326 YYSTACK_FREE (yyss1);
1327 }
1328 # endif
1329 #endif /* no yyoverflow */
1330
1331 yyssp = yyss + yysize - 1;
1332 yyvsp = yyvs + yysize - 1;]b4_locations_if([
1333 yylsp = yyls + yysize - 1;])[
1334
1335 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1336 (unsigned long int) yystacksize));
1337
1338 if (yyss + yystacksize - 1 <= yyssp)
1339 YYABORT;
1340 }
1341
1342 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1343
1344 if (yystate == YYFINAL)
1345 YYACCEPT;
1346
1347 goto yybackup;
1348
1349 /*-----------.
1350 | yybackup. |
1351 `-----------*/
1352 yybackup:
1353
1354 /* Do appropriate processing given the current state. Read a
1355 lookahead token if we need one and don't already have one. */
1356
1357 /* First try to decide what to do without reference to lookahead token. */
1358 yyn = yypact[yystate];
1359 if (yyn == YYPACT_NINF)
1360 goto yydefault;
1361
1362 /* Not known => get a lookahead token if don't already have one. */
1363
1364 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1365 if (yychar == YYEMPTY)
1366 {]b4_push_if([[
1367 if (!yyps->yynew)
1368 {]b4_use_push_for_pull_if([], [[
1369 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1370 yyresult = YYPUSH_MORE;
1371 goto yypushreturn;
1372 }
1373 yyps->yynew = 0;]b4_pure_if([], [[
1374 /* Restoring the pushed token is only necessary for the first
1375 yypush_parse invocation since subsequent invocations don't overwrite
1376 it before jumping to yyread_pushed_token. */
1377 yychar = yypushed_char;
1378 yylval = yypushed_val;]b4_locations_if([[
1379 yylloc = yypushed_loc;]])])[
1380 yyread_pushed_token:]])[
1381 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1382 yychar = yypushed_char;
1383 if (yypushed_val)
1384 yylval = *yypushed_val;]b4_locations_if([[
1385 if (yypushed_loc)
1386 yylloc = *yypushed_loc;]])])], [[
1387 yychar = YYLEX;]])[
1388 }
1389
1390 if (yychar <= YYEOF)
1391 {
1392 yychar = yytoken = YYEOF;
1393 YYDPRINTF ((stderr, "Now at end of input.\n"));
1394 }
1395 else
1396 {
1397 yytoken = YYTRANSLATE (yychar);
1398 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1399 }
1400
1401 /* If the proper action on seeing token YYTOKEN is to reduce or to
1402 detect an error, take that action. */
1403 yyn += yytoken;
1404 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
1405 goto yydefault;
1406 yyn = yytable[yyn];
1407 if (yyn <= 0)
1408 {
1409 if (yyn == 0 || yyn == YYTABLE_NINF)
1410 goto yyerrlab;
1411 yyn = -yyn;
1412 goto yyreduce;
1413 }
1414
1415 /* Count tokens shifted since error; after three, turn off error
1416 status. */
1417 if (yyerrstatus)
1418 yyerrstatus--;
1419
1420 /* Shift the lookahead token. */
1421 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1422
1423 /* Discard the shifted token. */
1424 yychar = YYEMPTY;
1425
1426 yystate = yyn;
1427 *++yyvsp = yylval;
1428 ]b4_locations_if([ *++yylsp = yylloc;])[
1429 goto yynewstate;
1430
1431
1432 /*-----------------------------------------------------------.
1433 | yydefault -- do the default action for the current state. |
1434 `-----------------------------------------------------------*/
1435 yydefault:
1436 yyn = yydefact[yystate];
1437 if (yyn == 0)
1438 goto yyerrlab;
1439 goto yyreduce;
1440
1441
1442 /*-----------------------------.
1443 | yyreduce -- Do a reduction. |
1444 `-----------------------------*/
1445 yyreduce:
1446 /* yyn is the number of a rule to reduce with. */
1447 yylen = yyr2[yyn];
1448
1449 /* If YYLEN is nonzero, implement the default value of the action:
1450 `$$ = $1'.
1451
1452 Otherwise, the following line sets YYVAL to garbage.
1453 This behavior is undocumented and Bison
1454 users should not rely upon it. Assigning to YYVAL
1455 unconditionally makes the parser a bit smaller, and it avoids a
1456 GCC warning that YYVAL may be used uninitialized. */
1457 yyval = yyvsp[1-yylen];
1458
1459 ]b4_locations_if(
1460 [[ /* Default location. */
1461 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1462 YY_REDUCE_PRINT (yyn);
1463 switch (yyn)
1464 {
1465 ]b4_user_actions[
1466 default: break;
1467 }
1468 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1469
1470 YYPOPSTACK (yylen);
1471 yylen = 0;
1472 YY_STACK_PRINT (yyss, yyssp);
1473
1474 *++yyvsp = yyval;]b4_locations_if([
1475 *++yylsp = yyloc;])[
1476
1477 /* Now `shift' the result of the reduction. Determine what state
1478 that goes to, based on the state we popped back to and the rule
1479 number reduced by. */
1480
1481 yyn = yyr1[yyn];
1482
1483 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1484 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1485 yystate = yytable[yystate];
1486 else
1487 yystate = yydefgoto[yyn - YYNTOKENS];
1488
1489 goto yynewstate;
1490
1491
1492 /*------------------------------------.
1493 | yyerrlab -- here on detecting error |
1494 `------------------------------------*/
1495 yyerrlab:
1496 /* If not already recovering from an error, report this error. */
1497 if (!yyerrstatus)
1498 {
1499 ++yynerrs;
1500 #if ! YYERROR_VERBOSE
1501 yyerror (]b4_yyerror_args[YY_("syntax error"));
1502 #else
1503 {
1504 YYSIZE_T yysize = yysyntax_error (0, yystate, yychar);
1505 if (yymsg_alloc < yysize && yymsg_alloc < YYSTACK_ALLOC_MAXIMUM)
1506 {
1507 YYSIZE_T yyalloc = 2 * yysize;
1508 if (! (yysize <= yyalloc && yyalloc <= YYSTACK_ALLOC_MAXIMUM))
1509 yyalloc = YYSTACK_ALLOC_MAXIMUM;
1510 if (yymsg != yymsgbuf)
1511 YYSTACK_FREE (yymsg);
1512 yymsg = (char *) YYSTACK_ALLOC (yyalloc);
1513 if (yymsg)
1514 yymsg_alloc = yyalloc;
1515 else
1516 {
1517 yymsg = yymsgbuf;
1518 yymsg_alloc = sizeof yymsgbuf;
1519 }
1520 }
1521
1522 if (0 < yysize && yysize <= yymsg_alloc)
1523 {
1524 (void) yysyntax_error (yymsg, yystate, yychar);
1525 yyerror (]b4_yyerror_args[yymsg);
1526 }
1527 else
1528 {
1529 yyerror (]b4_yyerror_args[YY_("syntax error"));
1530 if (yysize != 0)
1531 goto yyexhaustedlab;
1532 }
1533 }
1534 #endif
1535 }
1536
1537 ]b4_locations_if([[ yyerror_range[0] = yylloc;]])[
1538
1539 if (yyerrstatus == 3)
1540 {
1541 /* If just tried and failed to reuse lookahead token after an
1542 error, discard it. */
1543
1544 if (yychar <= YYEOF)
1545 {
1546 /* Return failure if at end of input. */
1547 if (yychar == YYEOF)
1548 YYABORT;
1549 }
1550 else
1551 {
1552 yydestruct ("Error: discarding",
1553 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1554 yychar = YYEMPTY;
1555 }
1556 }
1557
1558 /* Else will try to reuse lookahead token after shifting the error
1559 token. */
1560 goto yyerrlab1;
1561
1562
1563 /*---------------------------------------------------.
1564 | yyerrorlab -- error raised explicitly by YYERROR. |
1565 `---------------------------------------------------*/
1566 yyerrorlab:
1567
1568 /* Pacify compilers like GCC when the user code never invokes
1569 YYERROR and the label yyerrorlab therefore never appears in user
1570 code. */
1571 if (/*CONSTCOND*/ 0)
1572 goto yyerrorlab;
1573
1574 ]b4_locations_if([[ yyerror_range[0] = yylsp[1-yylen];
1575 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1576 this YYERROR. */
1577 YYPOPSTACK (yylen);
1578 yylen = 0;
1579 YY_STACK_PRINT (yyss, yyssp);
1580 yystate = *yyssp;
1581 goto yyerrlab1;
1582
1583
1584 /*-------------------------------------------------------------.
1585 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1586 `-------------------------------------------------------------*/
1587 yyerrlab1:
1588 yyerrstatus = 3; /* Each real token shifted decrements this. */
1589
1590 for (;;)
1591 {
1592 yyn = yypact[yystate];
1593 if (yyn != YYPACT_NINF)
1594 {
1595 yyn += YYTERROR;
1596 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1597 {
1598 yyn = yytable[yyn];
1599 if (0 < yyn)
1600 break;
1601 }
1602 }
1603
1604 /* Pop the current state because it cannot handle the error token. */
1605 if (yyssp == yyss)
1606 YYABORT;
1607
1608 ]b4_locations_if([[ yyerror_range[0] = *yylsp;]])[
1609 yydestruct ("Error: popping",
1610 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1611 YYPOPSTACK (1);
1612 yystate = *yyssp;
1613 YY_STACK_PRINT (yyss, yyssp);
1614 }
1615
1616 *++yyvsp = yylval;
1617 ]b4_locations_if([[
1618 yyerror_range[1] = yylloc;
1619 /* Using YYLLOC is tempting, but would change the location of
1620 the lookahead. YYLOC is available though. */
1621 YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
1622 *++yylsp = yyloc;]])[
1623
1624 /* Shift the error token. */
1625 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1626
1627 yystate = yyn;
1628 goto yynewstate;
1629
1630
1631 /*-------------------------------------.
1632 | yyacceptlab -- YYACCEPT comes here. |
1633 `-------------------------------------*/
1634 yyacceptlab:
1635 yyresult = 0;
1636 goto yyreturn;
1637
1638 /*-----------------------------------.
1639 | yyabortlab -- YYABORT comes here. |
1640 `-----------------------------------*/
1641 yyabortlab:
1642 yyresult = 1;
1643 goto yyreturn;
1644
1645 #if !defined(yyoverflow) || YYERROR_VERBOSE
1646 /*-------------------------------------------------.
1647 | yyexhaustedlab -- memory exhaustion comes here. |
1648 `-------------------------------------------------*/
1649 yyexhaustedlab:
1650 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1651 yyresult = 2;
1652 /* Fall through. */
1653 #endif
1654
1655 yyreturn:
1656 if (yychar != YYEMPTY)
1657 yydestruct ("Cleanup: discarding lookahead",
1658 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1659 /* Do not reclaim the symbols of the rule which action triggered
1660 this YYABORT or YYACCEPT. */
1661 YYPOPSTACK (yylen);
1662 YY_STACK_PRINT (yyss, yyssp);
1663 while (yyssp != yyss)
1664 {
1665 yydestruct ("Cleanup: popping",
1666 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1667 YYPOPSTACK (1);
1668 }
1669 #ifndef yyoverflow
1670 if (yyss != yyssa)
1671 YYSTACK_FREE (yyss);
1672 #endif
1673 ]b4_push_if([[ yyps->yynew = 1;
1674
1675 yypushreturn:
1676 ]])[#if YYERROR_VERBOSE
1677 if (yymsg != yymsgbuf)
1678 YYSTACK_FREE (yymsg);
1679 #endif
1680 /* Make sure YYID is used. */
1681 return YYID (yyresult);
1682 }
1683
1684
1685 ]b4_epilogue
1686 b4_defines_if(
1687 [@output(b4_spec_defines_file@)@
1688 b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],
1689 [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005,
1690 2006, 2009])
1691
1692 b4_percent_code_get([[requires]])[]dnl
1693
1694 b4_token_enums_defines(b4_tokens)
1695
1696 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
1697 ]m4_ifdef([b4_stype],
1698 [[typedef union ]b4_union_name[
1699 {
1700 ]b4_user_stype[
1701 } YYSTYPE;
1702 # define YYSTYPE_IS_TRIVIAL 1]],
1703 [m4_if(b4_tag_seen_flag, 0,
1704 [[typedef int YYSTYPE;
1705 # define YYSTYPE_IS_TRIVIAL 1]])])[
1706 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
1707 # define YYSTYPE_IS_DECLARED 1
1708 #endif
1709
1710 ]b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;]])
1711
1712 b4_locations_if(
1713 [#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
1714 typedef struct YYLTYPE
1715 {
1716 int first_line;
1717 int first_column;
1718 int last_line;
1719 int last_column;
1720 } YYLTYPE;
1721 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
1722 # define YYLTYPE_IS_DECLARED 1
1723 # define YYLTYPE_IS_TRIVIAL 1
1724 #endif
1725
1726 ]b4_pure_if([], [[extern YYLTYPE ]b4_prefix[lloc;]])
1727 )dnl b4_locations_if
1728 b4_push_if([[
1729 #ifndef YYPUSH_DECLS
1730 # define YYPUSH_DECLS
1731 struct ]b4_prefix[pstate;
1732 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
1733 enum { YYPUSH_MORE = 4 };
1734 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
1735 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
1736 [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([,
1737 [[[int yypushed_char]], [[yypushed_char]]],
1738 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1739 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1740 b4_parse_param]))
1741 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
1742 [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1743 b4_parse_param]))])
1744 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
1745 [[[void]], []])
1746 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
1747 [[b4_prefix[pstate *yyps]], [[yyps]]])[
1748 #endif
1749 ]])
1750 b4_percent_code_get([[provides]])[]dnl
1751 ])dnl b4_defines_if
1752 m4_divert_pop(0)
bison