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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,
5 # 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6
7 m4_pushdef([b4_copyright_years],
8 [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010])
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@{b4_subtract([$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@{b4_subtract([$2], [$1])@})])
148
149
150 ## ------------------ ##
151 ## Parser variables. ##
152 ## ------------------ ##
153
154 # b4_declare_scanner_communication_variables
155 # ------------------------------------------
156 # Declare the variables that are global, or local to YYPARSE if
157 # pure-parser.
158 m4_define([b4_declare_scanner_communication_variables], [[
159 /* The lookahead symbol. */
160 int yychar;
161
162 /* The semantic value of the lookahead symbol. */
163 YYSTYPE yylval;]b4_locations_if([[
164
165 /* Location data for the lookahead symbol. */
166 YYLTYPE yylloc;]])b4_pure_if([], [[
167
168 /* Number of syntax errors so far. */
169 int yynerrs;]])])
170
171
172 # b4_declare_parser_state_variables
173 # ---------------------------------
174 # Declare all the variables that are needed to maintain the parser state
175 # between calls to yypush_parse.
176 m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
177 /* Number of syntax errors so far. */
178 int yynerrs;
179 ]])[
180 int yystate;
181 /* Number of tokens to shift before error messages enabled. */
182 int yyerrstatus;
183
184 /* The stacks and their tools:
185 `yyss': related to states.
186 `yyvs': related to semantic values.]b4_locations_if([[
187 `yyls': related to locations.]])[
188
189 Refer to the stacks thru separate pointers, to allow yyoverflow
190 to reallocate them elsewhere. */
191
192 /* The state stack. */
193 yytype_int16 yyssa[YYINITDEPTH];
194 yytype_int16 *yyss;
195 yytype_int16 *yyssp;
196
197 /* The semantic value stack. */
198 YYSTYPE yyvsa[YYINITDEPTH];
199 YYSTYPE *yyvs;
200 YYSTYPE *yyvsp;]b4_locations_if([[
201
202 /* The location stack. */
203 YYLTYPE yylsa[YYINITDEPTH];
204 YYLTYPE *yyls;
205 YYLTYPE *yylsp;
206
207 /* The locations where the error started and ended. */
208 YYLTYPE yyerror_range[3];]])[
209
210 YYSIZE_T yystacksize;]])
211
212
213 ## --------------------------------------------------------- ##
214 ## Defining symbol actions, e.g., printers and destructors. ##
215 ## --------------------------------------------------------- ##
216
217 # We do want M4 expansion after # for CPP macros.
218 m4_changecom()
219 m4_divert_push(0)dnl
220 @output(b4_parser_file_name@)@
221 b4_copyright([Implementation for Bison's Yacc-like parsers in C])[
222
223 /* C LALR(1) parser skeleton written by Richard Stallman, by
224 simplifying the original so-called "semantic" parser. */
225
226 /* All symbols defined below should begin with yy or YY, to avoid
227 infringing on user name space. This should be done even for local
228 variables, as they might otherwise be expanded by user macros.
229 There are some unavoidable exceptions within include files to
230 define necessary library symbols; they are noted "INFRINGES ON
231 USER NAME SPACE" below. */
232
233 ]b4_identification
234 b4_percent_code_get([[top]])[]dnl
235 m4_if(b4_prefix, [yy], [],
236 [[/* Substitute the variable and function names. */]b4_pull_if([[
237 #define yyparse ]b4_prefix[parse]])b4_push_if([[
238 #define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[
239 #define yypull_parse ]b4_prefix[pull_parse]])[
240 #define yypstate_new ]b4_prefix[pstate_new
241 #define yypstate_delete ]b4_prefix[pstate_delete
242 #define yypstate ]b4_prefix[pstate]])[
243 #define yylex ]b4_prefix[lex
244 #define yyerror ]b4_prefix[error
245 #define yylval ]b4_prefix[lval
246 #define yychar ]b4_prefix[char
247 #define yydebug ]b4_prefix[debug
248 #define yynerrs ]b4_prefix[nerrs
249 ]b4_locations_if([[#define yylloc ]b4_prefix[lloc]])])[
250
251 /* Copy the first part of user declarations. */
252 ]b4_user_pre_prologue[
253
254 /* Enabling traces. */
255 #ifndef YYDEBUG
256 # define YYDEBUG ]b4_parse_trace_if([1], [0])[
257 #endif
258
259 /* Enabling verbose error messages. */
260 #ifdef YYERROR_VERBOSE
261 # undef YYERROR_VERBOSE
262 # define YYERROR_VERBOSE 1
263 #else
264 # define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
265 #endif
266
267 /* Enabling the token table. */
268 #ifndef YYTOKEN_TABLE
269 # define YYTOKEN_TABLE ]b4_token_table[
270 #endif
271
272 ]b4_percent_code_get([[requires]])[]dnl
273
274 b4_token_enums_defines(b4_tokens)[
275
276 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
277 ]m4_ifdef([b4_stype],
278 [[typedef union ]b4_union_name[
279 {
280 ]b4_user_stype[
281 } YYSTYPE;
282 # define YYSTYPE_IS_TRIVIAL 1]],
283 [m4_if(b4_tag_seen_flag, 0,
284 [[typedef int YYSTYPE;
285 # define YYSTYPE_IS_TRIVIAL 1]])])[
286 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
287 # define YYSTYPE_IS_DECLARED 1
288 #endif]b4_locations_if([[
289
290 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
291 typedef struct YYLTYPE
292 {
293 int first_line;
294 int first_column;
295 int last_line;
296 int last_column;
297 } YYLTYPE;
298 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
299 # define YYLTYPE_IS_DECLARED 1
300 # define YYLTYPE_IS_TRIVIAL 1
301 #endif]])b4_push_if([[
302
303 #ifndef YYPUSH_DECLS
304 # define YYPUSH_DECLS
305 struct yypstate;
306 typedef struct yypstate yypstate;
307 enum { YYPUSH_MORE = 4 };
308
309 ]b4_pull_if([b4_c_function_decl([[yyparse]], [[int]], b4_parse_param)
310 ])b4_c_function_decl([[yypush_parse]], [[int]],
311 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
312 [[[int yypushed_char]], [[yypushed_char]]],
313 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
314 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
315 b4_parse_param]))
316 b4_pull_if([b4_c_function_decl([[yypull_parse]], [[int]],
317 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
318 b4_parse_param]))])
319 b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []])
320 b4_c_function_decl([[yypstate_delete]], [[void]],
321 [[[yypstate *yyps]], [[yyps]]])[
322 #endif]])
323
324 b4_percent_code_get([[provides]])[]dnl
325
326 [/* Copy the second part of user declarations. */
327 ]b4_user_post_prologue
328 b4_percent_code_get[]dnl
329
330 [#ifdef short
331 # undef short
332 #endif
333
334 #ifdef YYTYPE_UINT8
335 typedef YYTYPE_UINT8 yytype_uint8;
336 #else
337 typedef unsigned char yytype_uint8;
338 #endif
339
340 #ifdef YYTYPE_INT8
341 typedef YYTYPE_INT8 yytype_int8;
342 #elif ]b4_c_modern[
343 typedef signed char yytype_int8;
344 #else
345 typedef short int yytype_int8;
346 #endif
347
348 #ifdef YYTYPE_UINT16
349 typedef YYTYPE_UINT16 yytype_uint16;
350 #else
351 typedef unsigned short int yytype_uint16;
352 #endif
353
354 #ifdef YYTYPE_INT16
355 typedef YYTYPE_INT16 yytype_int16;
356 #else
357 typedef short int yytype_int16;
358 #endif
359
360 #ifndef YYSIZE_T
361 # ifdef __SIZE_TYPE__
362 # define YYSIZE_T __SIZE_TYPE__
363 # elif defined size_t
364 # define YYSIZE_T size_t
365 # elif ! defined YYSIZE_T && ]b4_c_modern[
366 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */
367 # define YYSIZE_T size_t
368 # else
369 # define YYSIZE_T unsigned int
370 # endif
371 #endif
372
373 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
374
375 #ifndef YY_
376 # if defined YYENABLE_NLS && YYENABLE_NLS
377 # if ENABLE_NLS
378 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */
379 # define YY_(msgid) dgettext ("bison-runtime", msgid)
380 # endif
381 # endif
382 # ifndef YY_
383 # define YY_(msgid) msgid
384 # endif
385 #endif
386
387 /* Suppress unused-variable warnings by "using" E. */
388 #if ! defined lint || defined __GNUC__
389 # define YYUSE(e) ((void) (e))
390 #else
391 # define YYUSE(e) /* empty */
392 #endif
393
394 /* Identity function, used to suppress warnings about constant conditions. */
395 #ifndef lint
396 # define YYID(n) (n)
397 #else
398 ]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[
399 {
400 return yyi;
401 }
402 #endif
403
404 #if ! defined yyoverflow || YYERROR_VERBOSE
405
406 ]b4_push_if([],
407 [[/* The parser invokes alloca or malloc; define the necessary symbols. */
408
409 # ifdef YYSTACK_USE_ALLOCA
410 # if YYSTACK_USE_ALLOCA
411 # ifdef __GNUC__
412 # define YYSTACK_ALLOC __builtin_alloca
413 # elif defined __BUILTIN_VA_ARG_INCR
414 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
415 # elif defined _AIX
416 # define YYSTACK_ALLOC __alloca
417 # elif defined _MSC_VER
418 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
419 # define alloca _alloca
420 # else
421 # define YYSTACK_ALLOC alloca
422 # if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS && ]b4_c_modern[
423 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
424 # ifndef EXIT_SUCCESS
425 # define EXIT_SUCCESS 0
426 # endif
427 # endif
428 # endif
429 # endif
430 # endif
431
432 ]])dnl
433 [# ifdef YYSTACK_ALLOC
434 /* Pacify GCC's `empty if-body' warning. */
435 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
436 # ifndef YYSTACK_ALLOC_MAXIMUM
437 /* The OS might guarantee only one guard page at the bottom of the stack,
438 and a page size can be as small as 4096 bytes. So we cannot safely
439 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
440 to allow for a few compiler-allocated temporary stack slots. */
441 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
442 # endif
443 # else
444 # define YYSTACK_ALLOC YYMALLOC
445 # define YYSTACK_FREE YYFREE
446 # ifndef YYSTACK_ALLOC_MAXIMUM
447 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
448 # endif
449 # if (defined __cplusplus && ! defined EXIT_SUCCESS \
450 && ! ((defined YYMALLOC || defined malloc) \
451 && (defined YYFREE || defined free)))
452 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
453 # ifndef EXIT_SUCCESS
454 # define EXIT_SUCCESS 0
455 # endif
456 # endif
457 # ifndef YYMALLOC
458 # define YYMALLOC malloc
459 # if ! defined malloc && ! defined EXIT_SUCCESS && ]b4_c_modern[
460 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
461 # endif
462 # endif
463 # ifndef YYFREE
464 # define YYFREE free
465 # if ! defined free && ! defined EXIT_SUCCESS && ]b4_c_modern[
466 void free (void *); /* INFRINGES ON USER NAME SPACE */
467 # endif
468 # endif
469 # endif
470 #endif /* ! defined yyoverflow || YYERROR_VERBOSE */
471
472
473 #if (! defined yyoverflow \
474 && (! defined __cplusplus \
475 || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
476 && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
477
478 /* A type that is properly aligned for any stack member. */
479 union yyalloc
480 {
481 yytype_int16 yyss_alloc;
482 YYSTYPE yyvs_alloc;]b4_locations_if([
483 YYLTYPE yyls_alloc;])[
484 };
485
486 /* The size of the maximum gap between one aligned stack and the next. */
487 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
488
489 /* The size of an array large to enough to hold all stacks, each with
490 N elements. */
491 ]b4_locations_if(
492 [# define YYSTACK_BYTES(N) \
493 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
494 + 2 * YYSTACK_GAP_MAXIMUM)],
495 [# define YYSTACK_BYTES(N) \
496 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
497 + YYSTACK_GAP_MAXIMUM)])[
498
499 /* Copy COUNT objects from FROM to TO. The source and destination do
500 not overlap. */
501 # ifndef YYCOPY
502 # if defined __GNUC__ && 1 < __GNUC__
503 # define YYCOPY(To, From, Count) \
504 __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
505 # else
506 # define YYCOPY(To, From, Count) \
507 do \
508 { \
509 YYSIZE_T yyi; \
510 for (yyi = 0; yyi < (Count); yyi++) \
511 (To)[yyi] = (From)[yyi]; \
512 } \
513 while (YYID (0))
514 # endif
515 # endif
516
517 /* Relocate STACK from its old location to the new one. The
518 local variables YYSIZE and YYSTACKSIZE give the old and new number of
519 elements in the stack, and YYPTR gives the new location of the
520 stack. Advance YYPTR to a properly aligned location for the next
521 stack. */
522 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
523 do \
524 { \
525 YYSIZE_T yynewbytes; \
526 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
527 Stack = &yyptr->Stack_alloc; \
528 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
529 yyptr += yynewbytes / sizeof (*yyptr); \
530 } \
531 while (YYID (0))
532
533 #endif
534
535 /* YYFINAL -- State number of the termination state. */
536 #define YYFINAL ]b4_final_state_number[
537 /* YYLAST -- Last index in YYTABLE. */
538 #define YYLAST ]b4_last[
539
540 /* YYNTOKENS -- Number of terminals. */
541 #define YYNTOKENS ]b4_tokens_number[
542 /* YYNNTS -- Number of nonterminals. */
543 #define YYNNTS ]b4_nterms_number[
544 /* YYNRULES -- Number of rules. */
545 #define YYNRULES ]b4_rules_number[
546 /* YYNSTATES -- Number of states. */
547 #define YYNSTATES ]b4_states_number[
548
549 /* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
550 by yylex, with out-of-bounds checking. */
551 #define YYUNDEFTOK ]b4_undef_token_number[
552 #define YYMAXUTOK ]b4_user_token_number_max[
553
554 #define YYTRANSLATE(YYX) \
555 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
556
557 /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
558 as returned by yylex, without out-of-bounds checking. */
559 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
560 {
561 ]b4_translate[
562 };
563
564 #if YYDEBUG
565 ]b4_integral_parser_table_define([rline], [b4_rline],
566 [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
567 #endif
568
569 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
570 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
571 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
572 static const char *const yytname[] =
573 {
574 ]b4_tname[
575 };
576 #endif
577
578 # ifdef YYPRINT
579 /* YYTOKNUM[NUM] -- (External) token number corresponding to the
580 (internal) symbol number NUM (which must be that of a token). */
581 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
582 {
583 ]b4_toknum[
584 };
585 # endif
586
587 #define YYPACT_NINF ]b4_pact_ninf[
588
589 #define yypact_value_is_default(yystate) \
590 ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[
591
592 #define YYTABLE_NINF ]b4_table_ninf[
593
594 #define yytable_value_is_error(yytable_value) \
595 ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[
596
597 ]b4_parser_tables_define[
598
599 #define yyerrok (yyerrstatus = 0)
600 #define yyclearin (yychar = YYEMPTY)
601 #define YYEMPTY (-2)
602 #define YYEOF 0
603
604 #define YYACCEPT goto yyacceptlab
605 #define YYABORT goto yyabortlab
606 #define YYERROR goto yyerrorlab
607
608
609 /* Like YYERROR except do call yyerror. This remains here temporarily
610 to ease the transition to the new meaning of YYERROR, for GCC.
611 Once GCC version 2 has supplanted version 1, this can go. However,
612 YYFAIL appears to be in use. Nevertheless, it is formally deprecated
613 in Bison 2.4.2's NEWS entry, where a plan to phase it out is
614 discussed. */
615
616 #define YYFAIL goto yyerrlab
617 #if defined YYFAIL
618 /* This is here to suppress warnings from the GCC cpp's
619 -Wunused-macros. Normally we don't worry about that warning, but
620 some users do, and we want to make it easy for users to remove
621 YYFAIL uses, which will produce warnings from Bison 2.5. */
622 #endif
623
624 #define YYRECOVERING() (!!yyerrstatus)
625
626 #define YYBACKUP(Token, Value) \
627 do \
628 if (yychar == YYEMPTY && yylen == 1) \
629 { \
630 yychar = (Token); \
631 yylval = (Value); \
632 YYPOPSTACK (1); \
633 goto yybackup; \
634 } \
635 else \
636 { \
637 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
638 YYERROR; \
639 } \
640 while (YYID (0))
641
642
643 #define YYTERROR 1
644 #define YYERRCODE 256
645
646
647 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
648 If N is 0, then set CURRENT to the empty location which ends
649 the previous symbol: RHS[0] (always defined). */
650
651 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
652 #ifndef YYLLOC_DEFAULT
653 # define YYLLOC_DEFAULT(Current, Rhs, N) \
654 do \
655 if (YYID (N)) \
656 { \
657 (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
658 (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
659 (Current).last_line = YYRHSLOC (Rhs, N).last_line; \
660 (Current).last_column = YYRHSLOC (Rhs, N).last_column; \
661 } \
662 else \
663 { \
664 (Current).first_line = (Current).last_line = \
665 YYRHSLOC (Rhs, 0).last_line; \
666 (Current).first_column = (Current).last_column = \
667 YYRHSLOC (Rhs, 0).last_column; \
668 } \
669 while (YYID (0))
670 #endif]b4_locations_if([[
671
672
673 /* YY_LOCATION_PRINT -- Print the location on the stream.
674 This macro was not mandated originally: define only if we know
675 we won't break user code: when these are the locations we know. */
676
677 #ifndef YY_LOCATION_PRINT
678 # if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
679 # define YY_LOCATION_PRINT(File, Loc) \
680 fprintf (File, "%d.%d-%d.%d", \
681 (Loc).first_line, (Loc).first_column, \
682 (Loc).last_line, (Loc).last_column)
683 # else
684 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
685 # endif
686 #endif]], [[
687
688
689 /* This macro is provided for backward compatibility. */
690
691 #ifndef YY_LOCATION_PRINT
692 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
693 #endif]])[
694
695
696 /* YYLEX -- calling `yylex' with the right arguments. */
697
698 #ifdef YYLEX_PARAM
699 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
700 #else
701 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
702 #endif
703
704 /* Enable debugging if requested. */
705 #if YYDEBUG
706
707 # ifndef YYFPRINTF
708 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
709 # define YYFPRINTF fprintf
710 # endif
711
712 # define YYDPRINTF(Args) \
713 do { \
714 if (yydebug) \
715 YYFPRINTF Args; \
716 } while (YYID (0))
717
718 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
719 do { \
720 if (yydebug) \
721 { \
722 YYFPRINTF (stderr, "%s ", Title); \
723 yy_symbol_print (stderr, \
724 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
725 YYFPRINTF (stderr, "\n"); \
726 } \
727 } while (YYID (0))
728
729 ]b4_yy_symbol_print_generate([b4_c_function_def])[
730
731 /*------------------------------------------------------------------.
732 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
733 | TOP (included). |
734 `------------------------------------------------------------------*/
735
736 ]b4_c_function_def([yy_stack_print], [static void],
737 [[yytype_int16 *yybottom], [yybottom]],
738 [[yytype_int16 *yytop], [yytop]])[
739 {
740 YYFPRINTF (stderr, "Stack now");
741 for (; yybottom <= yytop; yybottom++)
742 {
743 int yybot = *yybottom;
744 YYFPRINTF (stderr, " %d", yybot);
745 }
746 YYFPRINTF (stderr, "\n");
747 }
748
749 # define YY_STACK_PRINT(Bottom, Top) \
750 do { \
751 if (yydebug) \
752 yy_stack_print ((Bottom), (Top)); \
753 } while (YYID (0))
754
755
756 /*------------------------------------------------.
757 | Report that the YYRULE is going to be reduced. |
758 `------------------------------------------------*/
759
760 ]b4_c_function_def([yy_reduce_print], [static void],
761 [[yytype_int16 *yyssp], [yyssp]],
762 [[YYSTYPE *yyvsp], [yyvsp]],
763 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
764 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
765 b4_parse_param]))[
766 {
767 unsigned long int yylno = yyrline[yyrule];
768 int yynrhs = yyr2[yyrule];
769 int yyi;
770 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
771 yyrule - 1, yylno);
772 /* The symbols being reduced. */
773 for (yyi = 0; yyi < yynrhs; yyi++)
774 {
775 YYFPRINTF (stderr, " $%d = ", yyi + 1);
776 yy_symbol_print (stderr,
777 yystos[yyssp[yyi + 1 - yynrhs]],
778 &]b4_rhs_value(yynrhs, yyi + 1)[
779 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
780 b4_user_args[);
781 YYFPRINTF (stderr, "\n");
782 }
783 }
784
785 # define YY_REDUCE_PRINT(Rule) \
786 do { \
787 if (yydebug) \
788 yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
789 } while (YYID (0))
790
791 /* Nonzero means print parse trace. It is left uninitialized so that
792 multiple parsers can coexist. */
793 int yydebug;
794 #else /* !YYDEBUG */
795 # define YYDPRINTF(Args)
796 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
797 # define YY_STACK_PRINT(Bottom, Top)
798 # define YY_REDUCE_PRINT(Rule)
799 #endif /* !YYDEBUG */
800
801
802 /* YYINITDEPTH -- initial size of the parser's stacks. */
803 #ifndef YYINITDEPTH
804 # define YYINITDEPTH ]b4_stack_depth_init[
805 #endif
806
807 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
808 if the built-in stack extension method is used).
809
810 Do not make this value too large; the results are undefined if
811 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
812 evaluated with infinite-precision integer arithmetic. */
813
814 #ifndef YYMAXDEPTH
815 # define YYMAXDEPTH ]b4_stack_depth_max[
816 #endif
817
818 \f
819
820 #if YYERROR_VERBOSE
821
822 # ifndef yystrlen
823 # if defined __GLIBC__ && defined _STRING_H
824 # define yystrlen strlen
825 # else
826 /* Return the length of YYSTR. */
827 ]b4_c_function_def([yystrlen], [static YYSIZE_T],
828 [[const char *yystr], [yystr]])[
829 {
830 YYSIZE_T yylen;
831 for (yylen = 0; yystr[yylen]; yylen++)
832 continue;
833 return yylen;
834 }
835 # endif
836 # endif
837
838 # ifndef yystpcpy
839 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
840 # define yystpcpy stpcpy
841 # else
842 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
843 YYDEST. */
844 ]b4_c_function_def([yystpcpy], [static char *],
845 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
846 {
847 char *yyd = yydest;
848 const char *yys = yysrc;
849
850 while ((*yyd++ = *yys++) != '\0')
851 continue;
852
853 return yyd - 1;
854 }
855 # endif
856 # endif
857
858 # ifndef yytnamerr
859 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
860 quotes and backslashes, so that it's suitable for yyerror. The
861 heuristic is that double-quoting is unnecessary unless the string
862 contains an apostrophe, a comma, or backslash (other than
863 backslash-backslash). YYSTR is taken from yytname. If YYRES is
864 null, do not copy; instead, return the length of what the result
865 would have been. */
866 static YYSIZE_T
867 yytnamerr (char *yyres, const char *yystr)
868 {
869 if (*yystr == '"')
870 {
871 YYSIZE_T yyn = 0;
872 char const *yyp = yystr;
873
874 for (;;)
875 switch (*++yyp)
876 {
877 case '\'':
878 case ',':
879 goto do_not_strip_quotes;
880
881 case '\\':
882 if (*++yyp != '\\')
883 goto do_not_strip_quotes;
884 /* Fall through. */
885 default:
886 if (yyres)
887 yyres[yyn] = *yyp;
888 yyn++;
889 break;
890
891 case '"':
892 if (yyres)
893 yyres[yyn] = '\0';
894 return yyn;
895 }
896 do_not_strip_quotes: ;
897 }
898
899 if (! yyres)
900 return yystrlen (yystr);
901
902 return yystpcpy (yyres, yystr) - yyres;
903 }
904 # endif
905
906 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
907 about the unexpected token YYTOKEN while in state YYSTATE.
908
909 Return 0 if *YYMSG was successfully written. Return 1 if an ordinary
910 "syntax error" message will suffice instead. Return 2 if *YYMSG is
911 not large enough to hold the message. In the last case, also set
912 *YYMSG_ALLOC to either (a) the required number of bytes or (b) zero
913 if the required number of bytes is too large to store. */
914 static int
915 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
916 int yystate, int yytoken)
917 {
918 int yyn = yypact[yystate];
919
920 if (! (YYPACT_NINF < yyn && yyn <= YYLAST))
921 return 1;
922 else
923 {
924 YYSIZE_T yysize0 = yytnamerr (0, yytname[yytoken]);
925 YYSIZE_T yysize = yysize0;
926 YYSIZE_T yysize1;
927 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
928 /* Internationalized format string. */
929 const char *yyformat = 0;
930 /* Arguments of yyformat. */
931 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
932
933 /* Start YYX at -YYN if negative to avoid negative indexes in
934 YYCHECK. In other words, skip the first -YYN actions for
935 this state because they are default actions. */
936 int yyxbegin = yyn < 0 ? -yyn : 0;
937
938 /* Stay within bounds of both yycheck and yytname. */
939 int yychecklim = YYLAST - yyn + 1;
940 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
941 /* Number of reported tokens (one for the "unexpected", one per
942 "expected"). */
943 int yycount = 0;
944 int yyx;
945
946 yyarg[yycount++] = yytname[yytoken];
947
948 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
949 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
950 && !yytable_value_is_error (yytable[yyx + yyn]))
951 {
952 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
953 {
954 yycount = 1;
955 yysize = yysize0;
956 break;
957 }
958 yyarg[yycount++] = yytname[yyx];
959 yysize1 = yysize + yytnamerr (0, yytname[yyx]);
960 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
961 {
962 /* Overflow. */
963 *yymsg_alloc = 0;
964 return 2;
965 }
966 yysize = yysize1;
967 }
968
969 switch (yycount)
970 {
971 #define YYCASE_(N, S) \
972 case N: \
973 yyformat = S; \
974 break
975 YYCASE_(1, YY_("syntax error, unexpected %s"));
976 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
977 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
978 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
979 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
980 #undef YYCASE_
981 }
982
983 yysize1 = yysize + yystrlen (yyformat);
984 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
985 {
986 /* Overflow. */
987 *yymsg_alloc = 0;
988 return 2;
989 }
990 yysize = yysize1;
991
992 if (*yymsg_alloc < yysize)
993 {
994 *yymsg_alloc = 2 * yysize;
995 if (! (yysize <= *yymsg_alloc
996 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
997 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
998 return 2;
999 }
1000
1001 /* Avoid sprintf, as that infringes on the user's name space.
1002 Don't have undefined behavior even if the translation
1003 produced a string with the wrong number of "%s"s. */
1004 {
1005 char *yyp = *yymsg;
1006 int yyi = 0;
1007 while ((*yyp = *yyformat) != '\0')
1008 if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
1009 {
1010 yyp += yytnamerr (yyp, yyarg[yyi++]);
1011 yyformat += 2;
1012 }
1013 else
1014 {
1015 yyp++;
1016 yyformat++;
1017 }
1018 }
1019 return 0;
1020 }
1021 }
1022 #endif /* YYERROR_VERBOSE */
1023 \f
1024
1025 ]b4_yydestruct_generate([b4_c_function_def])b4_push_if([], [[
1026
1027
1028 /* Prevent warnings from -Wmissing-prototypes. */
1029 #ifdef YYPARSE_PARAM
1030 ]b4_c_function_decl([yyparse], [int],
1031 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1032 #else /* ! YYPARSE_PARAM */
1033 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[
1034 #endif /* ! YYPARSE_PARAM */]])b4_pure_if([], [
1035
1036 b4_declare_scanner_communication_variables])[]b4_push_if([[
1037
1038
1039 struct yypstate
1040 {]b4_declare_parser_state_variables[
1041 /* Used to determine if this is the first time this instance has
1042 been used. */
1043 int yynew;
1044 };]b4_pure_if([], [[
1045
1046 static char yypstate_allocated = 0;]])b4_pull_if([
1047
1048 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
1049 {
1050 return yypull_parse (0]m4_ifset([b4_parse_param],
1051 [[, ]b4_c_args(b4_parse_param)])[);
1052 }
1053
1054 ]b4_c_function_def([[yypull_parse]], [[int]],
1055 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1056 b4_parse_param]))[
1057 {
1058 int yystatus;
1059 yypstate *yyps_local;]b4_pure_if([[
1060 int yychar;
1061 YYSTYPE yylval;]b4_locations_if([[
1062 YYLTYPE yylloc;]])])[
1063 if (yyps == 0)
1064 {
1065 yyps_local = yypstate_new ();
1066 if (!yyps_local)
1067 {]b4_pure_if([[
1068 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1069 if (!yypstate_allocated)
1070 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1071 return 2;
1072 }
1073 }
1074 else
1075 yyps_local = yyps;
1076 do {
1077 yychar = YYLEX;
1078 yystatus =
1079 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
1080 } while (yystatus == YYPUSH_MORE);
1081 if (yyps == 0)
1082 yypstate_delete (yyps_local);
1083 return yystatus;
1084 }]])[
1085
1086 /* Initialize the parser data structure. */
1087 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
1088 {
1089 yypstate *yyps;]b4_pure_if([], [[
1090 if (yypstate_allocated)
1091 return 0;]])[
1092 yyps = (yypstate *) malloc (sizeof *yyps);
1093 if (!yyps)
1094 return 0;
1095 yyps->yynew = 1;]b4_pure_if([], [[
1096 yypstate_allocated = 1;]])[
1097 return yyps;
1098 }
1099
1100 ]b4_c_function_def([[yypstate_delete]], [[void]],
1101 [[[yypstate *yyps]], [[yyps]]])[
1102 {
1103 #ifndef yyoverflow
1104 /* If the stack was reallocated but the parse did not complete, then the
1105 stack still needs to be freed. */
1106 if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1107 YYSTACK_FREE (yyps->yyss);
1108 #endif
1109 free (yyps);]b4_pure_if([], [[
1110 yypstate_allocated = 0;]])[
1111 }
1112 ]b4_pure_if([[
1113 #define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
1114 #define yystate yyps->yystate
1115 #define yyerrstatus yyps->yyerrstatus
1116 #define yyssa yyps->yyssa
1117 #define yyss yyps->yyss
1118 #define yyssp yyps->yyssp
1119 #define yyvsa yyps->yyvsa
1120 #define yyvs yyps->yyvs
1121 #define yyvsp yyps->yyvsp]b4_locations_if([[
1122 #define yylsa yyps->yylsa
1123 #define yyls yyps->yyls
1124 #define yylsp yyps->yylsp
1125 #define yyerror_range yyps->yyerror_range]])[
1126 #define yystacksize yyps->yystacksize
1127
1128
1129 /*---------------.
1130 | yypush_parse. |
1131 `---------------*/
1132
1133 ]b4_c_function_def([[yypush_parse]], [[int]],
1134 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1135 [[[int yypushed_char]], [[yypushed_char]]],
1136 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1137 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1138 b4_parse_param]))], [[
1139
1140
1141 /*----------.
1142 | yyparse. |
1143 `----------*/
1144
1145 #ifdef YYPARSE_PARAM
1146 ]b4_c_function_def([yyparse], [int],
1147 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1148 #else /* ! YYPARSE_PARAM */
1149 ]b4_c_function_def([yyparse], [int], b4_parse_param)[
1150 #endif]])[
1151 {]b4_pure_if([b4_declare_scanner_communication_variables
1152 ])b4_push_if([b4_pure_if([], [[
1153 int yypushed_char = yychar;
1154 YYSTYPE yypushed_val = yylval;]b4_locations_if([[
1155 YYLTYPE yypushed_loc = yylloc;]])
1156 ])],
1157 [b4_declare_parser_state_variables
1158 ])[
1159 int yyn;
1160 int yyresult;
1161 /* Lookahead token as an internal (translated) token number. */
1162 int yytoken;
1163 /* The variables used to return semantic value and location from the
1164 action routines. */
1165 YYSTYPE yyval;]b4_locations_if([[
1166 YYLTYPE yyloc;]])[
1167
1168 #if YYERROR_VERBOSE
1169 /* Buffer for error messages, and its allocated size. */
1170 char yymsgbuf[128];
1171 char *yymsg = yymsgbuf;
1172 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1173 #endif
1174
1175 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1176
1177 /* The number of symbols on the RHS of the reduced rule.
1178 Keep to zero when no symbol should be popped. */
1179 int yylen = 0;]b4_push_if([[
1180
1181 if (!yyps->yynew)
1182 {
1183 yyn = yypact[yystate];
1184 goto yyread_pushed_token;
1185 }]])[
1186
1187 yytoken = 0;
1188 yyss = yyssa;
1189 yyvs = yyvsa;]b4_locations_if([[
1190 yyls = yylsa;]])[
1191 yystacksize = YYINITDEPTH;
1192
1193 YYDPRINTF ((stderr, "Starting parse\n"));
1194
1195 yystate = 0;
1196 yyerrstatus = 0;
1197 yynerrs = 0;
1198 yychar = YYEMPTY; /* Cause a token to be read. */
1199
1200 /* Initialize stack pointers.
1201 Waste one element of value and location stack
1202 so that they stay on the same level as the state stack.
1203 The wasted elements are never initialized. */
1204 yyssp = yyss;
1205 yyvsp = yyvs;]b4_locations_if([[
1206 yylsp = yyls;
1207
1208 #if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
1209 /* Initialize the default location before parsing starts. */
1210 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1211 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1212 #endif]])
1213 m4_ifdef([b4_initial_action],[
1214 m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
1215 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
1216 /* User initialization code. */
1217 b4_user_initial_action
1218 m4_popdef([b4_dollar_dollar])dnl
1219 m4_popdef([b4_at_dollar])])dnl
1220 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1221 ]])dnl
1222 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1223 ]])[
1224 goto yysetstate;
1225
1226 /*------------------------------------------------------------.
1227 | yynewstate -- Push a new state, which is found in yystate. |
1228 `------------------------------------------------------------*/
1229 yynewstate:
1230 /* In all cases, when you get here, the value and location stacks
1231 have just been pushed. So pushing a state here evens the stacks. */
1232 yyssp++;
1233
1234 yysetstate:
1235 *yyssp = yystate;
1236
1237 if (yyss + yystacksize - 1 <= yyssp)
1238 {
1239 /* Get the current used size of the three stacks, in elements. */
1240 YYSIZE_T yysize = yyssp - yyss + 1;
1241
1242 #ifdef yyoverflow
1243 {
1244 /* Give user a chance to reallocate the stack. Use copies of
1245 these so that the &'s don't force the real ones into
1246 memory. */
1247 YYSTYPE *yyvs1 = yyvs;
1248 yytype_int16 *yyss1 = yyss;]b4_locations_if([
1249 YYLTYPE *yyls1 = yyls;])[
1250
1251 /* Each stack pointer address is followed by the size of the
1252 data in use in that stack, in bytes. This used to be a
1253 conditional around just the two extra args, but that might
1254 be undefined if yyoverflow is a macro. */
1255 yyoverflow (YY_("memory exhausted"),
1256 &yyss1, yysize * sizeof (*yyssp),
1257 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1258 &yyls1, yysize * sizeof (*yylsp),])[
1259 &yystacksize);
1260 ]b4_locations_if([
1261 yyls = yyls1;])[
1262 yyss = yyss1;
1263 yyvs = yyvs1;
1264 }
1265 #else /* no yyoverflow */
1266 # ifndef YYSTACK_RELOCATE
1267 goto yyexhaustedlab;
1268 # else
1269 /* Extend the stack our own way. */
1270 if (YYMAXDEPTH <= yystacksize)
1271 goto yyexhaustedlab;
1272 yystacksize *= 2;
1273 if (YYMAXDEPTH < yystacksize)
1274 yystacksize = YYMAXDEPTH;
1275
1276 {
1277 yytype_int16 *yyss1 = yyss;
1278 union yyalloc *yyptr =
1279 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1280 if (! yyptr)
1281 goto yyexhaustedlab;
1282 YYSTACK_RELOCATE (yyss_alloc, yyss);
1283 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1284 YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1285 # undef YYSTACK_RELOCATE
1286 if (yyss1 != yyssa)
1287 YYSTACK_FREE (yyss1);
1288 }
1289 # endif
1290 #endif /* no yyoverflow */
1291
1292 yyssp = yyss + yysize - 1;
1293 yyvsp = yyvs + yysize - 1;]b4_locations_if([
1294 yylsp = yyls + yysize - 1;])[
1295
1296 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1297 (unsigned long int) yystacksize));
1298
1299 if (yyss + yystacksize - 1 <= yyssp)
1300 YYABORT;
1301 }
1302
1303 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1304
1305 if (yystate == YYFINAL)
1306 YYACCEPT;
1307
1308 goto yybackup;
1309
1310 /*-----------.
1311 | yybackup. |
1312 `-----------*/
1313 yybackup:
1314
1315 /* Do appropriate processing given the current state. Read a
1316 lookahead token if we need one and don't already have one. */
1317
1318 /* First try to decide what to do without reference to lookahead token. */
1319 yyn = yypact[yystate];
1320 if (yypact_value_is_default (yyn))
1321 goto yydefault;
1322
1323 /* Not known => get a lookahead token if don't already have one. */
1324
1325 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1326 if (yychar == YYEMPTY)
1327 {]b4_push_if([[
1328 if (!yyps->yynew)
1329 {]b4_use_push_for_pull_if([], [[
1330 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1331 yyresult = YYPUSH_MORE;
1332 goto yypushreturn;
1333 }
1334 yyps->yynew = 0;]b4_pure_if([], [[
1335 /* Restoring the pushed token is only necessary for the first
1336 yypush_parse invocation since subsequent invocations don't overwrite
1337 it before jumping to yyread_pushed_token. */
1338 yychar = yypushed_char;
1339 yylval = yypushed_val;]b4_locations_if([[
1340 yylloc = yypushed_loc;]])])[
1341 yyread_pushed_token:]])[
1342 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1343 yychar = yypushed_char;
1344 if (yypushed_val)
1345 yylval = *yypushed_val;]b4_locations_if([[
1346 if (yypushed_loc)
1347 yylloc = *yypushed_loc;]])])], [[
1348 yychar = YYLEX;]])[
1349 }
1350
1351 if (yychar <= YYEOF)
1352 {
1353 yychar = yytoken = YYEOF;
1354 YYDPRINTF ((stderr, "Now at end of input.\n"));
1355 }
1356 else
1357 {
1358 yytoken = YYTRANSLATE (yychar);
1359 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1360 }
1361
1362 /* If the proper action on seeing token YYTOKEN is to reduce or to
1363 detect an error, take that action. */
1364 yyn += yytoken;
1365 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
1366 goto yydefault;
1367 yyn = yytable[yyn];
1368 if (yyn <= 0)
1369 {
1370 if (yytable_value_is_error (yyn))
1371 goto yyerrlab;
1372 yyn = -yyn;
1373 goto yyreduce;
1374 }
1375
1376 /* Count tokens shifted since error; after three, turn off error
1377 status. */
1378 if (yyerrstatus)
1379 yyerrstatus--;
1380
1381 /* Shift the lookahead token. */
1382 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1383
1384 /* Discard the shifted token. */
1385 yychar = YYEMPTY;
1386
1387 yystate = yyn;
1388 *++yyvsp = yylval;
1389 ]b4_locations_if([ *++yylsp = yylloc;])[
1390 goto yynewstate;
1391
1392
1393 /*-----------------------------------------------------------.
1394 | yydefault -- do the default action for the current state. |
1395 `-----------------------------------------------------------*/
1396 yydefault:
1397 yyn = yydefact[yystate];
1398 if (yyn == 0)
1399 goto yyerrlab;
1400 goto yyreduce;
1401
1402
1403 /*-----------------------------.
1404 | yyreduce -- Do a reduction. |
1405 `-----------------------------*/
1406 yyreduce:
1407 /* yyn is the number of a rule to reduce with. */
1408 yylen = yyr2[yyn];
1409
1410 /* If YYLEN is nonzero, implement the default value of the action:
1411 `$$ = $1'.
1412
1413 Otherwise, the following line sets YYVAL to garbage.
1414 This behavior is undocumented and Bison
1415 users should not rely upon it. Assigning to YYVAL
1416 unconditionally makes the parser a bit smaller, and it avoids a
1417 GCC warning that YYVAL may be used uninitialized. */
1418 yyval = yyvsp[1-yylen];
1419
1420 ]b4_locations_if(
1421 [[ /* Default location. */
1422 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1423 YY_REDUCE_PRINT (yyn);
1424 switch (yyn)
1425 {
1426 ]b4_user_actions[
1427 default: break;
1428 }
1429 /* User semantic actions sometimes alter yychar, and that requires
1430 that yytoken be updated with the new translation. We take the
1431 approach of translating immediately before every use of yytoken.
1432 One alternative is translating here after every semantic action,
1433 but that translation would be missed if the semantic action invokes
1434 YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
1435 if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an
1436 incorrect destructor might then be invoked immediately. In the
1437 case of YYERROR or YYBACKUP, subsequent parser actions might lead
1438 to an incorrect destructor call or verbose syntax error message
1439 before the lookahead is translated. */
1440 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1441
1442 YYPOPSTACK (yylen);
1443 yylen = 0;
1444 YY_STACK_PRINT (yyss, yyssp);
1445
1446 *++yyvsp = yyval;]b4_locations_if([
1447 *++yylsp = yyloc;])[
1448
1449 /* Now `shift' the result of the reduction. Determine what state
1450 that goes to, based on the state we popped back to and the rule
1451 number reduced by. */
1452
1453 yyn = yyr1[yyn];
1454
1455 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1456 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1457 yystate = yytable[yystate];
1458 else
1459 yystate = yydefgoto[yyn - YYNTOKENS];
1460
1461 goto yynewstate;
1462
1463
1464 /*------------------------------------.
1465 | yyerrlab -- here on detecting error |
1466 `------------------------------------*/
1467 yyerrlab:
1468 /* Make sure we have latest lookahead translation. See comments at
1469 user semantic actions for why this is necessary. */
1470 yytoken = YYTRANSLATE (yychar);
1471
1472 /* If not already recovering from an error, report this error. */
1473 if (!yyerrstatus)
1474 {
1475 ++yynerrs;
1476 #if ! YYERROR_VERBOSE
1477 yyerror (]b4_yyerror_args[YY_("syntax error"));
1478 #else
1479 # define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, yystate, \
1480 yytoken)
1481 {
1482 char const *yymsgp = YY_("syntax error");
1483 int yysyntax_error_status = YYSYNTAX_ERROR;
1484 if (yysyntax_error_status == 0)
1485 yymsgp = yymsg;
1486 else if (yysyntax_error_status == 2 && 0 < yymsg_alloc)
1487 {
1488 if (yymsg != yymsgbuf)
1489 YYSTACK_FREE (yymsg);
1490 yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
1491 if (!yymsg)
1492 {
1493 yymsg = yymsgbuf;
1494 yymsg_alloc = sizeof yymsgbuf;
1495 }
1496 else
1497 {
1498 yysyntax_error_status = YYSYNTAX_ERROR;
1499 yymsgp = yymsg;
1500 }
1501 }
1502 yyerror (]b4_yyerror_args[yymsgp);
1503 if (yysyntax_error_status == 2)
1504 goto yyexhaustedlab;
1505 }
1506 # undef YYSYNTAX_ERROR
1507 #endif
1508 }
1509
1510 ]b4_locations_if([[ yyerror_range[1] = yylloc;]])[
1511
1512 if (yyerrstatus == 3)
1513 {
1514 /* If just tried and failed to reuse lookahead token after an
1515 error, discard it. */
1516
1517 if (yychar <= YYEOF)
1518 {
1519 /* Return failure if at end of input. */
1520 if (yychar == YYEOF)
1521 YYABORT;
1522 }
1523 else
1524 {
1525 yydestruct ("Error: discarding",
1526 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1527 yychar = YYEMPTY;
1528 }
1529 }
1530
1531 /* Else will try to reuse lookahead token after shifting the error
1532 token. */
1533 goto yyerrlab1;
1534
1535
1536 /*---------------------------------------------------.
1537 | yyerrorlab -- error raised explicitly by YYERROR. |
1538 `---------------------------------------------------*/
1539 yyerrorlab:
1540
1541 /* Pacify compilers like GCC when the user code never invokes
1542 YYERROR and the label yyerrorlab therefore never appears in user
1543 code. */
1544 if (/*CONSTCOND*/ 0)
1545 goto yyerrorlab;
1546
1547 ]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen];
1548 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1549 this YYERROR. */
1550 YYPOPSTACK (yylen);
1551 yylen = 0;
1552 YY_STACK_PRINT (yyss, yyssp);
1553 yystate = *yyssp;
1554 goto yyerrlab1;
1555
1556
1557 /*-------------------------------------------------------------.
1558 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1559 `-------------------------------------------------------------*/
1560 yyerrlab1:
1561 yyerrstatus = 3; /* Each real token shifted decrements this. */
1562
1563 for (;;)
1564 {
1565 yyn = yypact[yystate];
1566 if (!yypact_value_is_default (yyn))
1567 {
1568 yyn += YYTERROR;
1569 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1570 {
1571 yyn = yytable[yyn];
1572 if (0 < yyn)
1573 break;
1574 }
1575 }
1576
1577 /* Pop the current state because it cannot handle the error token. */
1578 if (yyssp == yyss)
1579 YYABORT;
1580
1581 ]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[
1582 yydestruct ("Error: popping",
1583 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1584 YYPOPSTACK (1);
1585 yystate = *yyssp;
1586 YY_STACK_PRINT (yyss, yyssp);
1587 }
1588
1589 *++yyvsp = yylval;
1590 ]b4_locations_if([[
1591 yyerror_range[2] = yylloc;
1592 /* Using YYLLOC is tempting, but would change the location of
1593 the lookahead. YYLOC is available though. */
1594 YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
1595 *++yylsp = yyloc;]])[
1596
1597 /* Shift the error token. */
1598 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1599
1600 yystate = yyn;
1601 goto yynewstate;
1602
1603
1604 /*-------------------------------------.
1605 | yyacceptlab -- YYACCEPT comes here. |
1606 `-------------------------------------*/
1607 yyacceptlab:
1608 yyresult = 0;
1609 goto yyreturn;
1610
1611 /*-----------------------------------.
1612 | yyabortlab -- YYABORT comes here. |
1613 `-----------------------------------*/
1614 yyabortlab:
1615 yyresult = 1;
1616 goto yyreturn;
1617
1618 #if !defined(yyoverflow) || YYERROR_VERBOSE
1619 /*-------------------------------------------------.
1620 | yyexhaustedlab -- memory exhaustion comes here. |
1621 `-------------------------------------------------*/
1622 yyexhaustedlab:
1623 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1624 yyresult = 2;
1625 /* Fall through. */
1626 #endif
1627
1628 yyreturn:
1629 if (yychar != YYEMPTY)
1630 {
1631 /* Make sure we have latest lookahead translation. See comments at
1632 user semantic actions for why this is necessary. */
1633 yytoken = YYTRANSLATE (yychar);
1634 yydestruct ("Cleanup: discarding lookahead",
1635 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1636 }
1637 /* Do not reclaim the symbols of the rule which action triggered
1638 this YYABORT or YYACCEPT. */
1639 YYPOPSTACK (yylen);
1640 YY_STACK_PRINT (yyss, yyssp);
1641 while (yyssp != yyss)
1642 {
1643 yydestruct ("Cleanup: popping",
1644 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1645 YYPOPSTACK (1);
1646 }
1647 #ifndef yyoverflow
1648 if (yyss != yyssa)
1649 YYSTACK_FREE (yyss);
1650 #endif]b4_push_if([[
1651 yyps->yynew = 1;
1652
1653 yypushreturn:]])[
1654 #if YYERROR_VERBOSE
1655 if (yymsg != yymsgbuf)
1656 YYSTACK_FREE (yymsg);
1657 #endif
1658 /* Make sure YYID is used. */
1659 return YYID (yyresult);
1660 }
1661
1662 ]b4_epilogue[]dnl
1663 b4_defines_if(
1664 [@output(b4_spec_defines_file@)@
1665 b4_copyright([Interface for Bison's Yacc-like parsers in C])dnl
1666
1667 b4_percent_code_get([[requires]])[]dnl
1668
1669 b4_token_enums_defines(b4_tokens)
1670
1671 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
1672 ]m4_ifdef([b4_stype],
1673 [[typedef union ]b4_union_name[
1674 {
1675 ]b4_user_stype[
1676 } YYSTYPE;
1677 # define YYSTYPE_IS_TRIVIAL 1]],
1678 [m4_if(b4_tag_seen_flag, 0,
1679 [[typedef int YYSTYPE;
1680 # define YYSTYPE_IS_TRIVIAL 1]])])[
1681 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
1682 # define YYSTYPE_IS_DECLARED 1
1683 #endif
1684
1685 ]b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;]])
1686
1687 b4_locations_if(
1688 [#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
1689 typedef struct YYLTYPE
1690 {
1691 int first_line;
1692 int first_column;
1693 int last_line;
1694 int last_column;
1695 } YYLTYPE;
1696 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
1697 # define YYLTYPE_IS_DECLARED 1
1698 # define YYLTYPE_IS_TRIVIAL 1
1699 #endif
1700
1701 ]b4_pure_if([], [[extern YYLTYPE ]b4_prefix[lloc;]])
1702 )dnl b4_locations_if
1703 b4_push_if([[
1704 #ifndef YYPUSH_DECLS
1705 # define YYPUSH_DECLS
1706 struct ]b4_prefix[pstate;
1707 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
1708 enum { YYPUSH_MORE = 4 };
1709 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
1710 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
1711 [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([,
1712 [[[int yypushed_char]], [[yypushed_char]]],
1713 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1714 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1715 b4_parse_param]))
1716 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
1717 [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1718 b4_parse_param]))])
1719 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
1720 [[[void]], []])
1721 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
1722 [[b4_prefix[pstate *yyps]], [[yyps]]])[
1723 #endif
1724 ]])
1725 b4_percent_code_get([[provides]])[]dnl
1726 ])dnl b4_defines_if
1727 m4_divert_pop(0)
1728 m4_popdef([b4_copyright_years])
bison