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1 m4_divert(-1) -*- C -*-
2
3 # Yacc compatible skeleton for Bison
4
5 # Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
6 # Free Software Foundation, Inc.
7
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 2 of the License, or
11 # (at your option) any later version.
12
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
17
18 # You should have received a copy of the GNU General Public License
19 # along with this program; if not, write to the Free Software
20 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 # 02110-1301 USA
22
23 m4_include(b4_pkgdatadir/[c.m4])
24
25 ## ---------------- ##
26 ## Default values. ##
27 ## ---------------- ##
28
29 # Stack parameters.
30 m4_define_default([b4_stack_depth_max], [10000])
31 m4_define_default([b4_stack_depth_init], [200])
32
33
34 ## ------------------------ ##
35 ## Pure/impure interfaces. ##
36 ## ------------------------ ##
37
38
39 # b4_yacc_pure_if(IF-TRUE, IF-FALSE)
40 # ----------------------------------
41 # Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
42 m4_define([b4_yacc_pure_if],
43 [b4_pure_if([m4_ifset([b4_parse_param],
44 [$1], [$2])],
45 [$2])])
46
47
48 # b4_yyerror_args
49 # ---------------
50 # Arguments passed to yyerror: user args plus yylloc.
51 m4_define([b4_yyerror_args],
52 [b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
53 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
54
55
56 # b4_lex_param
57 # ------------
58 # Accumulate in b4_lex_param all the yylex arguments.
59 # b4_lex_param arrives quoted twice, but we want to keep only one level.
60 m4_define([b4_lex_param],
61 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
62 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
63 m4_ifdef([b4_lex_param], b4_lex_param)))
64
65
66
67 ## ------------ ##
68 ## Data Types. ##
69 ## ------------ ##
70
71 # b4_int_type(MIN, MAX)
72 # ---------------------
73 # Return the smallest int type able to handle numbers ranging from
74 # MIN to MAX (included). Overwrite the version from c.m4, which
75 # uses only C89 types, so that the user can override the shorter
76 # types, and so that pre-C89 compilers are handled correctly.
77 m4_define([b4_int_type],
78 [m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8],
79 b4_ints_in($@, [-128], [127]), [1], [yytype_int8],
80
81 b4_ints_in($@, [0], [65535]), [1], [yytype_uint16],
82 b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
83
84 m4_eval([0 <= $1]), [1], [unsigned int],
85
86 [int])])
87
88
89 ## ----------------- ##
90 ## Semantic Values. ##
91 ## ----------------- ##
92
93
94 # b4_lhs_value([TYPE])
95 # --------------------
96 # Expansion of $<TYPE>$.
97 m4_define([b4_lhs_value],
98 [(yyval[]m4_ifval([$1], [.$1]))])
99
100
101 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
102 # --------------------------------------
103 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
104 # symbols on RHS.
105 m4_define([b4_rhs_value],
106 [(yyvsp@{($2) - ($1)@}m4_ifval([$3], [.$3]))])
107
108
109
110 ## ----------- ##
111 ## Locations. ##
112 ## ----------- ##
113
114 # b4_lhs_location()
115 # -----------------
116 # Expansion of @$.
117 m4_define([b4_lhs_location],
118 [(yyloc)])
119
120
121 # b4_rhs_location(RULE-LENGTH, NUM)
122 # ---------------------------------
123 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
124 # on RHS.
125 m4_define([b4_rhs_location],
126 [(yylsp@{($2) - ($1)@})])
127
128
129
130 ## --------------------------------------------------------- ##
131 ## Defining symbol actions, e.g., printers and destructors. ##
132 ## --------------------------------------------------------- ##
133
134 # We do want M4 expansion after # for CPP macros.
135 m4_changecom()
136 m4_divert(0)dnl
137 @output b4_parser_file_name
138 b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
139 [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])[
140
141 /* C LALR(1) parser skeleton written by Richard Stallman, by
142 simplifying the original so-called "semantic" parser. */
143
144 /* All symbols defined below should begin with yy or YY, to avoid
145 infringing on user name space. This should be done even for local
146 variables, as they might otherwise be expanded by user macros.
147 There are some unavoidable exceptions within include files to
148 define necessary library symbols; they are noted "INFRINGES ON
149 USER NAME SPACE" below. */
150
151 ]b4_identification
152 m4_if(b4_prefix, [yy], [],
153 [/* Substitute the variable and function names. */
154 ]b4_push_if([#define yypush_parse b4_prefix[]push_parse
155 #define yypstate_new b4_prefix[]pstate_new
156 #define yypstate_delete b4_prefix[]pstate_delete
157 #define yypstate b4_prefix[]pstate],
158 [#define yyparse b4_prefix[]parse])[
159 #define yylex b4_prefix[]lex
160 #define yyerror b4_prefix[]error
161 #define yylval b4_prefix[]lval
162 #define yychar b4_prefix[]char
163 #define yydebug b4_prefix[]debug
164 #define yynerrs b4_prefix[]nerrs
165 b4_locations_if([#define yylloc b4_prefix[]lloc])])[
166
167 /* Copy the first part of user declarations. */
168 ]b4_user_pre_prologue[
169
170 /* Enabling traces. */
171 #ifndef YYDEBUG
172 # define YYDEBUG ]b4_debug_flag[
173 #endif
174
175 /* Enabling verbose error messages. */
176 #ifdef YYERROR_VERBOSE
177 # undef YYERROR_VERBOSE
178 # define YYERROR_VERBOSE 1
179 #else
180 # define YYERROR_VERBOSE ]b4_error_verbose_flag[
181 #endif
182
183 /* Enabling the token table. */
184 #ifndef YYTOKEN_TABLE
185 # define YYTOKEN_TABLE ]b4_token_table[
186 #endif
187
188 ]m4_ifdef([b4_requires],
189 [[/* Copy the %requires blocks. */
190 ]b4_user_requires])[]dnl
191
192 b4_token_enums_defines(b4_tokens)[
193
194 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
195 ]m4_ifdef([b4_stype],
196 [[typedef union ]b4_union_name[
197 ]b4_user_stype[
198 YYSTYPE;
199 # define YYSTYPE_IS_TRIVIAL 1]],
200 [m4_if(b4_tag_seen_flag, 0,
201 [[typedef int YYSTYPE;
202 # define YYSTYPE_IS_TRIVIAL 1]])])[
203 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
204 # define YYSTYPE_IS_DECLARED 1
205 #endif
206
207 ]b4_locations_if([#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
208 typedef struct YYLTYPE
209 {
210 int first_line;
211 int first_column;
212 int last_line;
213 int last_column;
214 } YYLTYPE;
215 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
216 # define YYLTYPE_IS_DECLARED 1
217 # define YYLTYPE_IS_TRIVIAL 1
218 #endif])
219
220 m4_ifdef([b4_provides],
221 [[/* Copy the %provides blocks. */
222 ]b4_user_provides])[]dnl
223
224 [/* Copy the second part of user declarations. */
225 ]b4_user_post_prologue[
226
227 #ifdef short
228 # undef short
229 #endif
230
231 #ifdef YYTYPE_UINT8
232 typedef YYTYPE_UINT8 yytype_uint8;
233 #else
234 typedef unsigned char yytype_uint8;
235 #endif
236
237 #ifdef YYTYPE_INT8
238 typedef YYTYPE_INT8 yytype_int8;
239 #elif ]b4_c_modern[
240 typedef signed char yytype_int8;
241 #else
242 typedef short int yytype_int8;
243 #endif
244
245 #ifdef YYTYPE_UINT16
246 typedef YYTYPE_UINT16 yytype_uint16;
247 #else
248 typedef unsigned short int yytype_uint16;
249 #endif
250
251 #ifdef YYTYPE_INT16
252 typedef YYTYPE_INT16 yytype_int16;
253 #else
254 typedef short int yytype_int16;
255 #endif
256
257 #ifndef YYSIZE_T
258 # ifdef __SIZE_TYPE__
259 # define YYSIZE_T __SIZE_TYPE__
260 # elif defined size_t
261 # define YYSIZE_T size_t
262 # elif ! defined YYSIZE_T && ]b4_c_modern[
263 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */
264 # define YYSIZE_T size_t
265 # else
266 # define YYSIZE_T unsigned int
267 # endif
268 #endif
269
270 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
271
272 #ifndef YY_
273 # if YYENABLE_NLS
274 # if ENABLE_NLS
275 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */
276 # define YY_(msgid) dgettext ("bison-runtime", msgid)
277 # endif
278 # endif
279 # ifndef YY_
280 # define YY_(msgid) msgid
281 # endif
282 #endif
283
284 /* Suppress unused-variable warnings by "using" E. */
285 #if ! defined lint || defined __GNUC__
286 # define YYUSE(e) ((void) (e))
287 #else
288 # define YYUSE(e) /* empty */
289 #endif
290
291 /* Identity function, used to suppress warnings about constant conditions. */
292 #ifndef lint
293 # define YYID(n) (n)
294 #else
295 ]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[
296 {
297 return yyi;
298 }
299 #endif
300
301 #if ! defined yyoverflow || YYERROR_VERBOSE
302
303 /* The parser invokes alloca or malloc; define the necessary symbols. */
304
305 # ifdef YYSTACK_USE_ALLOCA
306 # if YYSTACK_USE_ALLOCA
307 # ifdef __GNUC__
308 # define YYSTACK_ALLOC __builtin_alloca
309 # elif defined __BUILTIN_VA_ARG_INCR
310 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
311 # elif defined _AIX
312 # define YYSTACK_ALLOC __alloca
313 # elif defined _MSC_VER
314 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
315 # define alloca _alloca
316 # else
317 # define YYSTACK_ALLOC alloca
318 # if ! defined _ALLOCA_H && ! defined _STDLIB_H && ]b4_c_modern[
319 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
320 # ifndef _STDLIB_H
321 # define _STDLIB_H 1
322 # endif
323 # endif
324 # endif
325 # endif
326 # endif
327
328 # ifdef YYSTACK_ALLOC
329 /* Pacify GCC's `empty if-body' warning. */
330 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
331 # ifndef YYSTACK_ALLOC_MAXIMUM
332 /* The OS might guarantee only one guard page at the bottom of the stack,
333 and a page size can be as small as 4096 bytes. So we cannot safely
334 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
335 to allow for a few compiler-allocated temporary stack slots. */
336 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
337 # endif
338 # else
339 # define YYSTACK_ALLOC YYMALLOC
340 # define YYSTACK_FREE YYFREE
341 # ifndef YYSTACK_ALLOC_MAXIMUM
342 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
343 # endif
344 # if (defined __cplusplus && ! defined _STDLIB_H \
345 && ! ((defined YYMALLOC || defined malloc) \
346 && (defined YYFREE || defined free)))
347 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
348 # ifndef _STDLIB_H
349 # define _STDLIB_H 1
350 # endif
351 # endif
352 # ifndef YYMALLOC
353 # define YYMALLOC malloc
354 # if ! defined malloc && ! defined _STDLIB_H && ]b4_c_modern[
355 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
356 # endif
357 # endif
358 # ifndef YYFREE
359 # define YYFREE free
360 # if ! defined free && ! defined _STDLIB_H && ]b4_c_modern[
361 void free (void *); /* INFRINGES ON USER NAME SPACE */
362 # endif
363 # endif
364 # endif
365 #endif /* ! defined yyoverflow || YYERROR_VERBOSE */
366
367
368 #if (! defined yyoverflow \
369 && (! defined __cplusplus \
370 || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
371 && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
372
373 /* A type that is properly aligned for any stack member. */
374 union yyalloc
375 {
376 yytype_int16 yyss_alloc;
377 YYSTYPE yyvs_alloc;
378 ]b4_locations_if([ YYLTYPE yyls_alloc;
379 ])dnl
380 [};
381
382 /* The size of the maximum gap between one aligned stack and the next. */
383 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
384
385 /* The size of an array large to enough to hold all stacks, each with
386 N elements. */
387 ]b4_locations_if(
388 [# define YYSTACK_BYTES(N) \
389 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
390 + 2 * YYSTACK_GAP_MAXIMUM)],
391 [# define YYSTACK_BYTES(N) \
392 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
393 + YYSTACK_GAP_MAXIMUM)])[
394
395 /* Copy COUNT objects from FROM to TO. The source and destination do
396 not overlap. */
397 # ifndef YYCOPY
398 # if defined __GNUC__ && 1 < __GNUC__
399 # define YYCOPY(To, From, Count) \
400 __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
401 # else
402 # define YYCOPY(To, From, Count) \
403 do \
404 { \
405 YYSIZE_T yyi; \
406 for (yyi = 0; yyi < (Count); yyi++) \
407 (To)[yyi] = (From)[yyi]; \
408 } \
409 while (YYID (0))
410 # endif
411 # endif
412
413 /* Relocate STACK from its old location to the new one. The
414 local variables YYSIZE and YYSTACKSIZE give the old and new number of
415 elements in the stack, and YYPTR gives the new location of the
416 stack. Advance YYPTR to a properly aligned location for the next
417 stack. */
418 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
419 do \
420 { \
421 YYSIZE_T yynewbytes; \
422 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
423 Stack = &yyptr->Stack_alloc; \
424 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
425 yyptr += yynewbytes / sizeof (*yyptr); \
426 } \
427 while (YYID (0))
428
429 #endif
430
431 /* YYFINAL -- State number of the termination state. */
432 #define YYFINAL ]b4_final_state_number[
433 /* YYLAST -- Last index in YYTABLE. */
434 #define YYLAST ]b4_last[
435
436 /* YYNTOKENS -- Number of terminals. */
437 #define YYNTOKENS ]b4_tokens_number[
438 /* YYNNTS -- Number of nonterminals. */
439 #define YYNNTS ]b4_nterms_number[
440 /* YYNRULES -- Number of rules. */
441 #define YYNRULES ]b4_rules_number[
442 /* YYNRULES -- Number of states. */
443 #define YYNSTATES ]b4_states_number[
444
445 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
446 #define YYUNDEFTOK ]b4_undef_token_number[
447 #define YYMAXUTOK ]b4_user_token_number_max[
448
449 #define YYTRANSLATE(YYX) \
450 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
451
452 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */
453 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
454 {
455 ]b4_translate[
456 };
457
458 #if YYDEBUG
459 /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
460 YYRHS. */
461 static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
462 {
463 ]b4_prhs[
464 };
465
466 /* YYRHS -- A `-1'-separated list of the rules' RHS. */
467 static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
468 {
469 ]b4_rhs[
470 };
471
472 /* YYRLINE[YYN] -- source line where rule number YYN was defined. */
473 static const ]b4_int_type_for([b4_rline])[ yyrline[] =
474 {
475 ]b4_rline[
476 };
477 #endif
478
479 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
480 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
481 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
482 static const char *const yytname[] =
483 {
484 ]b4_tname[
485 };
486 #endif
487
488 # ifdef YYPRINT
489 /* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
490 token YYLEX-NUM. */
491 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
492 {
493 ]b4_toknum[
494 };
495 # endif
496
497 /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
498 static const ]b4_int_type_for([b4_r1])[ yyr1[] =
499 {
500 ]b4_r1[
501 };
502
503 /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */
504 static const ]b4_int_type_for([b4_r2])[ yyr2[] =
505 {
506 ]b4_r2[
507 };
508
509 /* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state
510 STATE-NUM when YYTABLE doesn't specify something else to do. Zero
511 means the default is an error. */
512 static const ]b4_int_type_for([b4_defact])[ yydefact[] =
513 {
514 ]b4_defact[
515 };
516
517 /* YYDEFGOTO[NTERM-NUM]. */
518 static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
519 {
520 ]b4_defgoto[
521 };
522
523 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
524 STATE-NUM. */
525 #define YYPACT_NINF ]b4_pact_ninf[
526 static const ]b4_int_type_for([b4_pact])[ yypact[] =
527 {
528 ]b4_pact[
529 };
530
531 /* YYPGOTO[NTERM-NUM]. */
532 static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] =
533 {
534 ]b4_pgoto[
535 };
536
537 /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If
538 positive, shift that token. If negative, reduce the rule which
539 number is the opposite. If zero, do what YYDEFACT says.
540 If YYTABLE_NINF, syntax error. */
541 #define YYTABLE_NINF ]b4_table_ninf[
542 static const ]b4_int_type_for([b4_table])[ yytable[] =
543 {
544 ]b4_table[
545 };
546
547 static const ]b4_int_type_for([b4_check])[ yycheck[] =
548 {
549 ]b4_check[
550 };
551
552 /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
553 symbol of state STATE-NUM. */
554 static const ]b4_int_type_for([b4_stos])[ yystos[] =
555 {
556 ]b4_stos[
557 };
558
559 #define yyerrok (yyerrstatus = 0)
560 #define yyclearin (yychar = YYEMPTY)
561 #define YYEMPTY (-2)
562 #define YYEOF 0
563
564 #define YYACCEPT goto yyacceptlab
565 #define YYABORT goto yyabortlab
566 #define YYERROR goto yyerrorlab
567
568
569 /* Like YYERROR except do call yyerror. This remains here temporarily
570 to ease the transition to the new meaning of YYERROR, for GCC.
571 Once GCC version 2 has supplanted version 1, this can go. */
572
573 #define YYFAIL goto yyerrlab
574
575 #define YYRECOVERING() (!!yyerrstatus)
576
577 #define YYBACKUP(Token, Value) \
578 do \
579 if (yychar == YYEMPTY && yylen == 1) \
580 { \
581 yychar = (Token); \
582 yylval = (Value); \
583 yytoken = YYTRANSLATE (yychar); \
584 YYPOPSTACK (1); \
585 goto yybackup; \
586 } \
587 else \
588 { \
589 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
590 YYERROR; \
591 } \
592 while (YYID (0))
593
594
595 #define YYTERROR 1
596 #define YYERRCODE 256
597
598
599 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
600 If N is 0, then set CURRENT to the empty location which ends
601 the previous symbol: RHS[0] (always defined). */
602
603 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
604 #ifndef YYLLOC_DEFAULT
605 # define YYLLOC_DEFAULT(Current, Rhs, N) \
606 do \
607 if (YYID (N)) \
608 { \
609 (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
610 (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
611 (Current).last_line = YYRHSLOC (Rhs, N).last_line; \
612 (Current).last_column = YYRHSLOC (Rhs, N).last_column; \
613 } \
614 else \
615 { \
616 (Current).first_line = (Current).last_line = \
617 YYRHSLOC (Rhs, 0).last_line; \
618 (Current).first_column = (Current).last_column = \
619 YYRHSLOC (Rhs, 0).last_column; \
620 } \
621 while (YYID (0))
622 #endif
623
624
625 /* YY_LOCATION_PRINT -- Print the location on the stream.
626 This macro was not mandated originally: define only if we know
627 we won't break user code: when these are the locations we know. */
628
629 #ifndef YY_LOCATION_PRINT
630 # if YYLTYPE_IS_TRIVIAL
631 # define YY_LOCATION_PRINT(File, Loc) \
632 fprintf (File, "%d.%d-%d.%d", \
633 (Loc).first_line, (Loc).first_column, \
634 (Loc).last_line, (Loc).last_column)
635 # else
636 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
637 # endif
638 #endif
639
640
641 /* YYLEX -- calling `yylex' with the right arguments. */
642
643 #ifdef YYLEX_PARAM
644 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
645 #else
646 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
647 #endif
648
649 /* Enable debugging if requested. */
650 #if YYDEBUG
651
652 # ifndef YYFPRINTF
653 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
654 # define YYFPRINTF fprintf
655 # endif
656
657 # define YYDPRINTF(Args) \
658 do { \
659 if (yydebug) \
660 YYFPRINTF Args; \
661 } while (YYID (0))
662
663 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
664 do { \
665 if (yydebug) \
666 { \
667 YYFPRINTF (stderr, "%s ", Title); \
668 yy_symbol_print (stderr, \
669 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
670 YYFPRINTF (stderr, "\n"); \
671 } \
672 } while (YYID (0))
673
674 ]b4_yy_symbol_print_generate([b4_c_function_def])[
675
676 /*------------------------------------------------------------------.
677 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
678 | TOP (included). |
679 `------------------------------------------------------------------*/
680
681 ]b4_c_function_def([yy_stack_print], [static void],
682 [[yytype_int16 *yybottom], [yybottom]],
683 [[yytype_int16 *yytop], [yytop]])[
684 {
685 YYFPRINTF (stderr, "Stack now");
686 for (; yybottom <= yytop; yybottom++)
687 {
688 int yybot = *yybottom;
689 YYFPRINTF (stderr, " %d", yybot);
690 }
691 YYFPRINTF (stderr, "\n");
692 }
693
694 # define YY_STACK_PRINT(Bottom, Top) \
695 do { \
696 if (yydebug) \
697 yy_stack_print ((Bottom), (Top)); \
698 } while (YYID (0))
699
700
701 /*------------------------------------------------.
702 | Report that the YYRULE is going to be reduced. |
703 `------------------------------------------------*/
704
705 ]b4_c_function_def([yy_reduce_print], [static void],
706 [[YYSTYPE *yyvsp], [yyvsp]],
707 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
708 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
709 b4_parse_param]))[
710 {
711 int yynrhs = yyr2[yyrule];
712 int yyi;
713 unsigned long int yylno = yyrline[yyrule];
714 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
715 yyrule - 1, yylno);
716 /* The symbols being reduced. */
717 for (yyi = 0; yyi < yynrhs; yyi++)
718 {
719 fprintf (stderr, " $%d = ", yyi + 1);
720 yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
721 &]b4_rhs_value(yynrhs, yyi + 1)[
722 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
723 b4_user_args[);
724 fprintf (stderr, "\n");
725 }
726 }
727
728 # define YY_REDUCE_PRINT(Rule) \
729 do { \
730 if (yydebug) \
731 yy_reduce_print (yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
732 } while (YYID (0))
733
734 /* Nonzero means print parse trace. It is left uninitialized so that
735 multiple parsers can coexist. */
736 int yydebug;
737 #else /* !YYDEBUG */
738 # define YYDPRINTF(Args)
739 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
740 # define YY_STACK_PRINT(Bottom, Top)
741 # define YY_REDUCE_PRINT(Rule)
742 #endif /* !YYDEBUG */
743
744
745 /* YYINITDEPTH -- initial size of the parser's stacks. */
746 #ifndef YYINITDEPTH
747 # define YYINITDEPTH ]b4_stack_depth_init[
748 #endif
749
750 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
751 if the built-in stack extension method is used).
752
753 Do not make this value too large; the results are undefined if
754 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
755 evaluated with infinite-precision integer arithmetic. */
756
757 #ifndef YYMAXDEPTH
758 # define YYMAXDEPTH ]b4_stack_depth_max[
759 #endif
760
761 \f
762
763 #if YYERROR_VERBOSE
764
765 # ifndef yystrlen
766 # if defined __GLIBC__ && defined _STRING_H
767 # define yystrlen strlen
768 # else
769 /* Return the length of YYSTR. */
770 ]b4_c_function_def([yystrlen], [static YYSIZE_T],
771 [[const char *yystr], [yystr]])[
772 {
773 YYSIZE_T yylen;
774 for (yylen = 0; yystr[yylen]; yylen++)
775 continue;
776 return yylen;
777 }
778 # endif
779 # endif
780
781 # ifndef yystpcpy
782 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
783 # define yystpcpy stpcpy
784 # else
785 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
786 YYDEST. */
787 ]b4_c_function_def([yystpcpy], [static char *],
788 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
789 {
790 char *yyd = yydest;
791 const char *yys = yysrc;
792
793 while ((*yyd++ = *yys++) != '\0')
794 continue;
795
796 return yyd - 1;
797 }
798 # endif
799 # endif
800
801 # ifndef yytnamerr
802 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
803 quotes and backslashes, so that it's suitable for yyerror. The
804 heuristic is that double-quoting is unnecessary unless the string
805 contains an apostrophe, a comma, or backslash (other than
806 backslash-backslash). YYSTR is taken from yytname. If YYRES is
807 null, do not copy; instead, return the length of what the result
808 would have been. */
809 static YYSIZE_T
810 yytnamerr (char *yyres, const char *yystr)
811 {
812 if (*yystr == '"')
813 {
814 YYSIZE_T yyn = 0;
815 char const *yyp = yystr;
816
817 for (;;)
818 switch (*++yyp)
819 {
820 case '\'':
821 case ',':
822 goto do_not_strip_quotes;
823
824 case '\\':
825 if (*++yyp != '\\')
826 goto do_not_strip_quotes;
827 /* Fall through. */
828 default:
829 if (yyres)
830 yyres[yyn] = *yyp;
831 yyn++;
832 break;
833
834 case '"':
835 if (yyres)
836 yyres[yyn] = '\0';
837 return yyn;
838 }
839 do_not_strip_quotes: ;
840 }
841
842 if (! yyres)
843 return yystrlen (yystr);
844
845 return yystpcpy (yyres, yystr) - yyres;
846 }
847 # endif
848
849 /* Copy into YYRESULT an error message about the unexpected token
850 YYCHAR while in state YYSTATE. Return the number of bytes copied,
851 including the terminating null byte. If YYRESULT is null, do not
852 copy anything; just return the number of bytes that would be
853 copied. As a special case, return 0 if an ordinary "syntax error"
854 message will do. Return YYSIZE_MAXIMUM if overflow occurs during
855 size calculation. */
856 static YYSIZE_T
857 yysyntax_error (char *yyresult, int yystate, int yychar)
858 {
859 int yyn = yypact[yystate];
860
861 if (! (YYPACT_NINF < yyn && yyn <= YYLAST))
862 return 0;
863 else
864 {
865 int yytype = YYTRANSLATE (yychar);
866 YYSIZE_T yysize0 = yytnamerr (0, yytname[yytype]);
867 YYSIZE_T yysize = yysize0;
868 YYSIZE_T yysize1;
869 int yysize_overflow = 0;
870 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
871 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
872 int yyx;
873
874 # if 0
875 /* This is so xgettext sees the translatable formats that are
876 constructed on the fly. */
877 YY_("syntax error, unexpected %s");
878 YY_("syntax error, unexpected %s, expecting %s");
879 YY_("syntax error, unexpected %s, expecting %s or %s");
880 YY_("syntax error, unexpected %s, expecting %s or %s or %s");
881 YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s");
882 # endif
883 char *yyfmt;
884 char const *yyf;
885 static char const yyunexpected[] = "syntax error, unexpected %s";
886 static char const yyexpecting[] = ", expecting %s";
887 static char const yyor[] = " or %s";
888 char yyformat[sizeof yyunexpected
889 + sizeof yyexpecting - 1
890 + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
891 * (sizeof yyor - 1))];
892 char const *yyprefix = yyexpecting;
893
894 /* Start YYX at -YYN if negative to avoid negative indexes in
895 YYCHECK. */
896 int yyxbegin = yyn < 0 ? -yyn : 0;
897
898 /* Stay within bounds of both yycheck and yytname. */
899 int yychecklim = YYLAST - yyn + 1;
900 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
901 int yycount = 1;
902
903 yyarg[0] = yytname[yytype];
904 yyfmt = yystpcpy (yyformat, yyunexpected);
905
906 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
907 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
908 {
909 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
910 {
911 yycount = 1;
912 yysize = yysize0;
913 yyformat[sizeof yyunexpected - 1] = '\0';
914 break;
915 }
916 yyarg[yycount++] = yytname[yyx];
917 yysize1 = yysize + yytnamerr (0, yytname[yyx]);
918 yysize_overflow |= (yysize1 < yysize);
919 yysize = yysize1;
920 yyfmt = yystpcpy (yyfmt, yyprefix);
921 yyprefix = yyor;
922 }
923
924 yyf = YY_(yyformat);
925 yysize1 = yysize + yystrlen (yyf);
926 yysize_overflow |= (yysize1 < yysize);
927 yysize = yysize1;
928
929 if (yysize_overflow)
930 return YYSIZE_MAXIMUM;
931
932 if (yyresult)
933 {
934 /* Avoid sprintf, as that infringes on the user's name space.
935 Don't have undefined behavior even if the translation
936 produced a string with the wrong number of "%s"s. */
937 char *yyp = yyresult;
938 int yyi = 0;
939 while ((*yyp = *yyf) != '\0')
940 {
941 if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
942 {
943 yyp += yytnamerr (yyp, yyarg[yyi++]);
944 yyf += 2;
945 }
946 else
947 {
948 yyp++;
949 yyf++;
950 }
951 }
952 }
953 return yysize;
954 }
955 }
956 #endif /* YYERROR_VERBOSE */
957 \f
958
959 ]b4_yydestruct_generate([b4_c_function_def])[
960 \f
961
962 /* Prevent warnings from -Wmissing-prototypes. */
963
964 ]b4_push_if([
965 struct yypstate;
966 typedef struct yypstate yypstate;
967 enum { YYPUSH_MORE = 4 };
968 ]b4_c_function_decl([yypstate_new], [yypstate *], [[void], []])[
969 ]b4_c_function_decl([yypstate_delete], [void], [[yypstate *yyps], [yyps]])[
970 ]b4_c_function_decl([yypush_parse], [int],
971 [[yypstate *yyps], [yyps]],
972 [[int yynchar], [yynchar]],
973 [[YYSTYPE const *yynlval], [yynlval]]
974 b4_locations_if([,[[YYLTYPE const *yynlloc], [yynlloc]]])
975 m4_ifset([b4_parse_param], [, b4_parse_param]))[
976 ],[#ifdef YYPARSE_PARAM
977 ]b4_c_function_decl([yyparse], [int],
978 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
979 #else /* ! YYPARSE_PARAM */
980 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[
981 #endif /* ! YYPARSE_PARAM */])[
982
983 ]m4_divert_push([KILL])# ======================== M4 code.
984 # b4_declare_scanner_communication_variables
985 # ------------------------------------------
986 # Declare the variables that are global, or local to YYPARSE if
987 # pure-parser.
988 m4_define([b4_declare_scanner_communication_variables],
989 [/* The lookahead symbol. */
990 int yychar;
991
992 /* The semantic value of the lookahead symbol. */
993 YYSTYPE yylval;
994
995 /* Number of syntax errors so far. */
996 ]b4_push_if([],[
997 int yynerrs;])[b4_locations_if([
998 /* Location data for the lookahead symbol. */
999 YYLTYPE yylloc;])
1000 ])
1001
1002 m4_define([b4_yyssa],b4_push_if([yyps->yyssa],[yyssa]))
1003 m4_define([b4_yyerror_range],b4_push_if([yyps->yyerror_range],[yyerror_range]))
1004
1005 # b4_declare_parser_state_variables
1006 # ---------------------------------
1007 # Declare all the variables that are needed to maintain the parser state
1008 # between calls to yypush_parse.
1009 m4_define([b4_declare_parser_state_variables],
1010 [[
1011 int yystate;
1012 int yyn;
1013 int yyresult;
1014 /* Number of tokens to shift before error messages enabled. */
1015 int yyerrstatus;
1016 /* Look-ahead token as an internal (translated) token number. */
1017 int yytoken]b4_push_if([], [[ = 0]])[;
1018
1019 /* Three stacks and their tools:
1020 `yyss': related to states,
1021 `yyvs': related to semantic values,
1022 `yyls': related to locations.
1023
1024 Refer to the stacks thru separate pointers, to allow yyoverflow
1025 to reallocate them elsewhere. */
1026
1027 /* The state stack. */
1028 yytype_int16 yyssa[YYINITDEPTH];
1029 yytype_int16 *yyss]b4_push_if([], [[ = yyssa]])[;
1030 yytype_int16 *yyssp;
1031
1032 /* The semantic value stack. */
1033 YYSTYPE yyvsa[YYINITDEPTH];
1034 YYSTYPE *yyvs]b4_push_if([], [[ = yyvsa]])[;
1035 YYSTYPE *yyvsp;]b4_locations_if([[
1036 /* The location stack. */
1037 YYLTYPE yylsa[YYINITDEPTH];
1038 YYLTYPE *yyls]b4_push_if([], [[ = yylsa]])[;
1039 YYLTYPE *yylsp;
1040 /* The locations where the error started and ended. */
1041 YYLTYPE yyerror_range[2];]])[
1042 YYSIZE_T yystacksize]b4_push_if([], [[ = YYINITDEPTH]])[;
1043 /* The variables used to return semantic value and location from the
1044 action routines. */
1045 YYSTYPE yyval;]b4_locations_if([[
1046 YYLTYPE yyloc;]])
1047 ])
1048
1049 m4_divert_pop([KILL])dnl# ====================== End of M4 code.
1050
1051 b4_pure_if([], [b4_declare_scanner_communication_variables])
1052
1053 b4_push_if(
1054 [[struct yypstate
1055 {
1056 ]b4_declare_parser_state_variables[
1057 /* Used to determine if this is the first time this instance has
1058 been used. */
1059 int yynew;
1060 };
1061
1062 /* Initialize the parser data structure. */
1063 ]b4_c_function_def([yypstate_new], [yypstate *])[
1064 {
1065 yypstate *yyps = (yypstate *) malloc (sizeof *yyps);
1066 yyps->yystate = 0;
1067 yyps->yyresult = -1;
1068 yyps->yyerrstatus = 0;
1069 yyps->yytoken = 0;
1070
1071 yyps->yyss = yyps->yyssa;
1072 yyps->yyvs = yyps->yyvsa;
1073
1074 ]b4_locations_if([
1075 yyps->yyls = yyps->yylsa;])[
1076 yyps->yystacksize = YYINITDEPTH;
1077
1078 yyps->yyssp = yyps->yyss;
1079 yyps->yyvsp = yyps->yyvs;
1080
1081 yyps->yynew = 1;
1082
1083 ]b4_locations_if([ yyps->yylsp = yyps->yyls;])[
1084
1085 return yyps;
1086 }
1087
1088 ]b4_c_function_def([yypstate_delete], [void],
1089 [[yypstate *yyps], [yyps]])[
1090 {
1091 free (yyps);
1092 }
1093
1094 #define yystate yyps->yystate
1095 #define yyn yyps->yyn
1096 #define yyresult yyps->yyresult
1097 #define yyerrstatus yyps->yyerrstatus
1098 #define yytoken yyps->yytoken
1099 #define yyss yyps->yyss
1100 #define yyssp yyps->yyssp
1101 #define yyvs yyps->yyvs
1102 #define yyvsp yyps->yyvsp
1103 ]b4_locations_if([[#define yyls yyps->yyls
1104 #define yylsp yyps->yylsp
1105 ]])[#define yystacksize yyps->yystacksize
1106 #define yyval yyps->yyval
1107 ]b4_locations_if([[#define yyloc yyps->yyloc
1108 ]])])[
1109
1110 /*-------------------------.
1111 | yyparse or yypush_parse. |
1112 `-------------------------*/
1113
1114 ]b4_push_if([
1115 b4_c_function_def([yypush_parse], [int], [[yypstate *yyps], [yyps]],
1116 [[int yynchar], [yynchar]],
1117 [[YYSTYPE const *yynlval], [yynlval]]
1118 b4_locations_if([,[[YYLTYPE const *yynlloc], [yynlloc]]])
1119 m4_ifset([b4_parse_param], [, b4_parse_param]))],[
1120 #ifdef YYPARSE_PARAM
1121 b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])
1122 #else /* ! YYPARSE_PARAM */
1123 b4_c_function_def([yyparse], [int], b4_parse_param)
1124 #endif])[
1125 {
1126 ]b4_pure_if([b4_declare_scanner_communication_variables])
1127 b4_push_if([], [b4_declare_parser_state_variables])[
1128
1129 #if YYERROR_VERBOSE
1130 /* Buffer for error messages, and its allocated size. */
1131 char yymsgbuf[128];
1132 char *yymsg = yymsgbuf;
1133 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1134 #endif
1135
1136 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1137
1138 /* The number of symbols on the RHS of the reduced rule.
1139 Keep to zero when no symbol should be popped. */
1140 int yylen = 0;
1141
1142 YYDPRINTF ((stderr, "Starting parse\n"));
1143
1144 ]b4_push_if([ yychar = yynchar;
1145 if (yynlval)
1146 yylval = *yynlval;
1147 ]b4_locations_if([ if (yynlloc)
1148 yylloc = *yynlloc;])[],[yynerrs = 0;
1149 yychar = YYEMPTY; /* Cause a token to be read. */])[
1150
1151 ]b4_push_if([],[[
1152 yystate = 0;
1153 yyerrstatus = 0;
1154
1155 /* Initialize stack pointers.
1156 Waste one element of value and location stack
1157 so that they stay on the same level as the state stack.
1158 The wasted elements are never initialized. */
1159
1160 yyssp = yyss;
1161 yyvsp = yyvs;
1162 ]b4_locations_if([[ yylsp = yyls;
1163 #if YYLTYPE_IS_TRIVIAL
1164 /* Initialize the default location before parsing starts. */
1165 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1166 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1167 #endif]])
1168 ])
1169 [ ]b4_push_if([
1170 if (yyps->yynew == 0)
1171 {
1172 goto gottoken;
1173 }
1174 yyps->yynew= 0;])
1175 m4_ifdef([b4_initial_action], [
1176 m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
1177 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
1178 /* User initialization code. */
1179 b4_user_initial_action
1180 m4_popdef([b4_dollar_dollar])dnl
1181 m4_popdef([b4_at_dollar])])dnl
1182 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1183 ]])dnl
1184 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1185 ]])dnl
1186 [
1187 goto yysetstate;
1188
1189 /*------------------------------------------------------------.
1190 | yynewstate -- Push a new state, which is found in yystate. |
1191 `------------------------------------------------------------*/
1192 yynewstate:
1193 /* In all cases, when you get here, the value and location stacks
1194 have just been pushed. So pushing a state here evens the stacks. */
1195 yyssp++;
1196
1197 yysetstate:
1198 *yyssp = yystate;
1199
1200 if (yyss + yystacksize - 1 <= yyssp)
1201 {
1202 /* Get the current used size of the three stacks, in elements. */
1203 YYSIZE_T yysize = yyssp - yyss + 1;
1204
1205 #ifdef yyoverflow
1206 {
1207 /* Give user a chance to reallocate the stack. Use copies of
1208 these so that the &'s don't force the real ones into
1209 memory. */
1210 YYSTYPE *yyvs1 = yyvs;
1211 yytype_int16 *yyss1 = yyss;
1212 ]b4_locations_if([ YYLTYPE *yyls1 = yyls;])[
1213
1214 /* Each stack pointer address is followed by the size of the
1215 data in use in that stack, in bytes. This used to be a
1216 conditional around just the two extra args, but that might
1217 be undefined if yyoverflow is a macro. */
1218 yyoverflow (YY_("memory exhausted"),
1219 &yyss1, yysize * sizeof (*yyssp),
1220 &yyvs1, yysize * sizeof (*yyvsp),
1221 ]b4_locations_if([ &yyls1, yysize * sizeof (*yylsp),])[
1222 &yystacksize);
1223 ]b4_locations_if([ yyls = yyls1;])[
1224 yyss = yyss1;
1225 yyvs = yyvs1;
1226 }
1227 #else /* no yyoverflow */
1228 # ifndef YYSTACK_RELOCATE
1229 goto yyexhaustedlab;
1230 # else
1231 /* Extend the stack our own way. */
1232 if (YYMAXDEPTH <= yystacksize)
1233 goto yyexhaustedlab;
1234 yystacksize *= 2;
1235 if (YYMAXDEPTH < yystacksize)
1236 yystacksize = YYMAXDEPTH;
1237
1238 {
1239 yytype_int16 *yyss1 = yyss;
1240 union yyalloc *yyptr =
1241 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1242 if (! yyptr)
1243 goto yyexhaustedlab;
1244 YYSTACK_RELOCATE (yyss_alloc, yyss);
1245 YYSTACK_RELOCATE (yyvs_alloc, yyvs);
1246 ]b4_locations_if([ YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1247 # undef YYSTACK_RELOCATE
1248 if (yyss1 != ]b4_yyssa[)
1249 YYSTACK_FREE (yyss1);
1250 }
1251 # endif
1252 #endif /* no yyoverflow */
1253
1254 yyssp = yyss + yysize - 1;
1255 yyvsp = yyvs + yysize - 1;
1256 ]b4_locations_if([ yylsp = yyls + yysize - 1;])[
1257
1258 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1259 (unsigned long int) yystacksize));
1260
1261 if (yyss + yystacksize - 1 <= yyssp)
1262 YYABORT;
1263 }
1264
1265 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1266
1267 if (yystate == YYFINAL)
1268 YYACCEPT;
1269
1270 goto yybackup;
1271
1272 /*-----------.
1273 | yybackup. |
1274 `-----------*/
1275 yybackup:
1276
1277 /* Do appropriate processing given the current state. Read a
1278 lookahead token if we need one and don't already have one. */
1279
1280 /* First try to decide what to do without reference to lookahead token. */
1281 yyn = yypact[yystate];
1282 if (yyn == YYPACT_NINF)
1283 goto yydefault;
1284
1285 /* Not known => get a lookahead token if don't already have one. */
1286
1287 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1288 if (yychar == YYEMPTY)
1289 {
1290 ]b4_push_if([
1291 YYDPRINTF ((stderr, "Return for a new token:\n"));
1292 yyresult = YYPUSH_MORE;
1293 goto yypushreturn;
1294 gottoken:])[
1295 YYDPRINTF ((stderr, "Reading a token: "));
1296 ]b4_push_if([], [yychar = YYLEX;])[
1297 }
1298
1299 if (yychar <= YYEOF)
1300 {
1301 yychar = yytoken = YYEOF;
1302 YYDPRINTF ((stderr, "Now at end of input.\n"));
1303 }
1304 else
1305 {
1306 yytoken = YYTRANSLATE (yychar);
1307 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1308 }
1309
1310 /* If the proper action on seeing token YYTOKEN is to reduce or to
1311 detect an error, take that action. */
1312 yyn += yytoken;
1313 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
1314 goto yydefault;
1315 yyn = yytable[yyn];
1316 if (yyn <= 0)
1317 {
1318 if (yyn == 0 || yyn == YYTABLE_NINF)
1319 goto yyerrlab;
1320 yyn = -yyn;
1321 goto yyreduce;
1322 }
1323
1324 /* Count tokens shifted since error; after three, turn off error
1325 status. */
1326 if (yyerrstatus)
1327 yyerrstatus--;
1328
1329 /* Shift the lookahead token. */
1330 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1331
1332 /* Discard the shifted token. */
1333 yychar = YYEMPTY;
1334
1335 yystate = yyn;
1336 *++yyvsp = yylval;
1337 ]b4_locations_if([ *++yylsp = yylloc;])[
1338 goto yynewstate;
1339
1340
1341 /*-----------------------------------------------------------.
1342 | yydefault -- do the default action for the current state. |
1343 `-----------------------------------------------------------*/
1344 yydefault:
1345 yyn = yydefact[yystate];
1346 if (yyn == 0)
1347 goto yyerrlab;
1348 goto yyreduce;
1349
1350
1351 /*-----------------------------.
1352 | yyreduce -- Do a reduction. |
1353 `-----------------------------*/
1354 yyreduce:
1355 /* yyn is the number of a rule to reduce with. */
1356 yylen = yyr2[yyn];
1357
1358 /* If YYLEN is nonzero, implement the default value of the action:
1359 `$$ = $1'.
1360
1361 Otherwise, the following line sets YYVAL to garbage.
1362 This behavior is undocumented and Bison
1363 users should not rely upon it. Assigning to YYVAL
1364 unconditionally makes the parser a bit smaller, and it avoids a
1365 GCC warning that YYVAL may be used uninitialized. */
1366 yyval = yyvsp[1-yylen];
1367
1368 ]b4_locations_if(
1369 [[ /* Default location. */
1370 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1371 YY_REDUCE_PRINT (yyn);
1372 switch (yyn)
1373 {
1374 ]b4_user_actions[
1375 default: break;
1376 }
1377 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1378
1379 YYPOPSTACK (yylen);
1380 yylen = 0;
1381 YY_STACK_PRINT (yyss, yyssp);
1382
1383 *++yyvsp = yyval;
1384 ]b4_locations_if([ *++yylsp = yyloc;])[
1385
1386 /* Now `shift' the result of the reduction. Determine what state
1387 that goes to, based on the state we popped back to and the rule
1388 number reduced by. */
1389
1390 yyn = yyr1[yyn];
1391
1392 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1393 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1394 yystate = yytable[yystate];
1395 else
1396 yystate = yydefgoto[yyn - YYNTOKENS];
1397
1398 goto yynewstate;
1399
1400
1401 /*------------------------------------.
1402 | yyerrlab -- here on detecting error |
1403 `------------------------------------*/
1404 yyerrlab:
1405 /* If not already recovering from an error, report this error. */
1406 if (!yyerrstatus)
1407 {
1408 ]b4_push_if([],[ ++yynerrs;])[
1409 #if ! YYERROR_VERBOSE
1410 yyerror (]b4_yyerror_args[YY_("syntax error"));
1411 #else
1412 {
1413 YYSIZE_T yysize = yysyntax_error (0, yystate, yychar);
1414 if (yymsg_alloc < yysize && yymsg_alloc < YYSTACK_ALLOC_MAXIMUM)
1415 {
1416 YYSIZE_T yyalloc = 2 * yysize;
1417 if (! (yysize <= yyalloc && yyalloc <= YYSTACK_ALLOC_MAXIMUM))
1418 yyalloc = YYSTACK_ALLOC_MAXIMUM;
1419 if (yymsg != yymsgbuf)
1420 YYSTACK_FREE (yymsg);
1421 yymsg = (char *) YYSTACK_ALLOC (yyalloc);
1422 if (yymsg)
1423 yymsg_alloc = yyalloc;
1424 else
1425 {
1426 yymsg = yymsgbuf;
1427 yymsg_alloc = sizeof yymsgbuf;
1428 }
1429 }
1430
1431 if (0 < yysize && yysize <= yymsg_alloc)
1432 {
1433 (void) yysyntax_error (yymsg, yystate, yychar);
1434 yyerror (]b4_yyerror_args[yymsg);
1435 }
1436 else
1437 {
1438 yyerror (]b4_yyerror_args[YY_("syntax error"));
1439 if (yysize != 0)
1440 goto yyexhaustedlab;
1441 }
1442 }
1443 #endif
1444 }
1445
1446 ]b4_locations_if([[ ]b4_yyerror_range[[0] = yylloc;]])[
1447
1448 if (yyerrstatus == 3)
1449 {
1450 /* If just tried and failed to reuse lookahead token after an
1451 error, discard it. */
1452
1453 if (yychar <= YYEOF)
1454 {
1455 /* Return failure if at end of input. */
1456 if (yychar == YYEOF)
1457 YYABORT;
1458 }
1459 else
1460 {
1461 yydestruct ("Error: discarding",
1462 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1463 yychar = YYEMPTY;
1464 }
1465 }
1466
1467 /* Else will try to reuse lookahead token after shifting the error
1468 token. */
1469 goto yyerrlab1;
1470
1471
1472 /*---------------------------------------------------.
1473 | yyerrorlab -- error raised explicitly by YYERROR. |
1474 `---------------------------------------------------*/
1475 yyerrorlab:
1476
1477 /* Pacify compilers like GCC when the user code never invokes
1478 YYERROR and the label yyerrorlab therefore never appears in user
1479 code. */
1480 if (/*CONSTCOND*/ 0)
1481 goto yyerrorlab;
1482
1483 ]b4_locations_if([[ ]b4_yyerror_range[[0] = yylsp[1-yylen];
1484 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1485 this YYERROR. */
1486 YYPOPSTACK (yylen);
1487 yylen = 0;
1488 YY_STACK_PRINT (yyss, yyssp);
1489 yystate = *yyssp;
1490 goto yyerrlab1;
1491
1492
1493 /*-------------------------------------------------------------.
1494 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1495 `-------------------------------------------------------------*/
1496 yyerrlab1:
1497 yyerrstatus = 3; /* Each real token shifted decrements this. */
1498
1499 for (;;)
1500 {
1501 yyn = yypact[yystate];
1502 if (yyn != YYPACT_NINF)
1503 {
1504 yyn += YYTERROR;
1505 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1506 {
1507 yyn = yytable[yyn];
1508 if (0 < yyn)
1509 break;
1510 }
1511 }
1512
1513 /* Pop the current state because it cannot handle the error token. */
1514 if (yyssp == yyss)
1515 YYABORT;
1516
1517 ]b4_locations_if([[ ]b4_yyerror_range[[0] = *yylsp;]])[
1518 yydestruct ("Error: popping",
1519 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1520 YYPOPSTACK (1);
1521 yystate = *yyssp;
1522 YY_STACK_PRINT (yyss, yyssp);
1523 }
1524
1525 *++yyvsp = yylval;
1526 ]b4_locations_if([[
1527 ]b4_yyerror_range[[1] = yylloc;
1528 /* Using YYLLOC is tempting, but would change the location of
1529 the lookahead. YYLOC is available though. */
1530 YYLLOC_DEFAULT (yyloc, (]b4_yyerror_range[- 1), 2);
1531 *++yylsp = yyloc;]])[
1532
1533 /* Shift the error token. */
1534 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1535
1536 yystate = yyn;
1537 goto yynewstate;
1538
1539
1540 /*-------------------------------------.
1541 | yyacceptlab -- YYACCEPT comes here. |
1542 `-------------------------------------*/
1543 yyacceptlab:
1544 yyresult = 0;
1545 goto yyreturn;
1546
1547 /*-----------------------------------.
1548 | yyabortlab -- YYABORT comes here. |
1549 `-----------------------------------*/
1550 yyabortlab:
1551 yyresult = 1;
1552 goto yyreturn;
1553
1554 #ifndef yyoverflow
1555 /*-------------------------------------------------.
1556 | yyexhaustedlab -- memory exhaustion comes here. |
1557 `-------------------------------------------------*/
1558 yyexhaustedlab:
1559 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1560 yyresult = 2;
1561 /* Fall through. */
1562 #endif
1563
1564 yyreturn:
1565 if (yychar != YYEMPTY)
1566 yydestruct ("Cleanup: discarding lookahead",
1567 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1568 /* Do not reclaim the symbols of the rule which action triggered
1569 this YYABORT or YYACCEPT. */
1570 YYPOPSTACK (yylen);
1571 YY_STACK_PRINT (yyss, yyssp);
1572 while (yyssp != yyss)
1573 {
1574 yydestruct ("Cleanup: popping",
1575 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1576 YYPOPSTACK (1);
1577 }
1578 #ifndef yyoverflow
1579 if (yyss != ]b4_yyssa[)
1580 YYSTACK_FREE (yyss);
1581 #endif
1582 ]b4_push_if([yypushreturn:])[
1583 #if YYERROR_VERBOSE
1584 if (yymsg != yymsgbuf)
1585 YYSTACK_FREE (yymsg);
1586 #endif
1587 /* Make sure YYID is used. */
1588 return YYID (yyresult);
1589 ]}
1590
1591 b4_epilogue
1592 b4_defines_if(
1593 [@output b4_spec_defines_file
1594 b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl '
1595 [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])
1596
1597 m4_ifdef([b4_requires],
1598 [[/* Copy the %requires blocks. */
1599 ]b4_user_requires])[]dnl
1600
1601 b4_token_enums_defines(b4_tokens)
1602
1603 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
1604 ]m4_ifdef([b4_stype],
1605 [[typedef union ]b4_union_name[
1606 ]b4_user_stype[
1607 YYSTYPE;
1608 # define YYSTYPE_IS_TRIVIAL 1]],
1609 [m4_if(b4_tag_seen_flag, 0,
1610 [[typedef int YYSTYPE;
1611 # define YYSTYPE_IS_TRIVIAL 1]])])[
1612 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
1613 # define YYSTYPE_IS_DECLARED 1
1614 #endif
1615
1616 ]b4_pure_if([],
1617 [extern YYSTYPE b4_prefix[]lval;])
1618
1619 b4_locations_if(
1620 [#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
1621 typedef struct YYLTYPE
1622 {
1623 int first_line;
1624 int first_column;
1625 int last_line;
1626 int last_column;
1627 } YYLTYPE;
1628 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
1629 # define YYLTYPE_IS_DECLARED 1
1630 # define YYLTYPE_IS_TRIVIAL 1
1631 #endif
1632
1633 ]b4_pure_if([],
1634 [extern YYLTYPE b4_prefix[]lloc;])
1635 )dnl b4_locations_if
1636
1637 ]b4_push_if([struct ]b4_prefix[pstate;
1638 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
1639 ]b4_c_function_decl([]b4_prefix[pstate_new], []b4_prefix[pstate *],
1640 [[void], []])[
1641 ]b4_c_function_decl([]b4_prefix[pstate_delete], [void],
1642 [[]b4_prefix[pstate *yyps],[yyps]])[
1643 ]b4_c_function_decl([]b4_prefix[push_parse], [int],
1644 [[]b4_prefix[pstate *]b4_prefix[pstate], []b4_prefix[pstate]],
1645 [[int yynchar], [yynchar]],
1646 [[YYSTYPE const *yynlval], [yynlval]]
1647 b4_locations_if([,[[YYLTYPE const *yynlloc], [yynlloc]]])
1648 m4_ifset([b4_parse_param], [, b4_parse_param]))[
1649 enum { YYPUSH_MORE = 4 };])[
1650
1651 m4_ifdef([b4_provides],
1652 [[/* Copy the %provides blocks. */
1653 ]b4_user_provides])[]
1654 ])dnl b4_defines_if
bison