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1 /* -*-C-*- Note some compilers choke on comments on `#line' lines. */
2 #line 3 "bison.simple"
3
4 /* Skeleton output parser for bison,
5 Copyright (C) 1984, 1989, 1990 Free Software Foundation, Inc.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20
21 /* As a special exception, when this file is copied by Bison into a
22 Bison output file, you may use that output file without restriction.
23 This special exception was added by the Free Software Foundation
24 in version 1.24 of Bison. */
25
26 /* This is the parser code that is written into each bison parser
27 when the %semantic_parser declaration is not specified in the grammar.
28 It was written by Richard Stallman by simplifying the hairy parser
29 used when %semantic_parser is specified. */
30
31 #ifndef alloca
32 #ifdef __GNUC__
33 #define alloca __builtin_alloca
34 #else /* not GNU C. */
35 #if (!defined (__STDC__) && defined (sparc)) || defined (__sparc__) || defined (__sparc) || defined (__sgi)
36 #include <alloca.h>
37 #else /* not sparc */
38 /* This used to test MSDOS, but that is a bad idea
39 since that is in the user namespace. */
40 #if defined (_MSDOS_) && !defined (__TURBOC__)
41 #include <malloc.h>
42 #else /* not _MSDOS_, or __TURBOC__ */
43 #if defined(_AIX)
44 #include <malloc.h>
45 #pragma alloca
46 #else /* not MSDOS, __TURBOC__, or _AIX */
47 #ifdef __hpux
48 #ifdef __cplusplus
49 extern "C" {
50 void *alloca (unsigned int);
51 };
52 #else /* not __cplusplus */
53 void *alloca ();
54 #endif /* not __cplusplus */
55 #endif /* __hpux */
56 #endif /* not _AIX */
57 #endif /* not _MSDOS_, or __TURBOC__ */
58 #endif /* not sparc. */
59 #endif /* not GNU C. */
60 #endif /* alloca not defined. */
61
62 /* Note: there must be only one dollar sign in this file.
63 It is replaced by the list of actions, each action
64 as one case of the switch. */
65
66 #define yyerrok (yyerrstatus = 0)
67 #define yyclearin (yychar = YYEMPTY)
68 #define YYEMPTY -2
69 #define YYEOF 0
70 #define YYACCEPT return(0)
71 #define YYABORT return(1)
72 #define YYERROR goto yyerrlab1
73 /* Like YYERROR except do call yyerror.
74 This remains here temporarily to ease the
75 transition to the new meaning of YYERROR, for GCC.
76 Once GCC version 2 has supplanted version 1, this can go. */
77 #define YYFAIL goto yyerrlab
78 #define YYRECOVERING() (!!yyerrstatus)
79 #define YYBACKUP(token, value) \
80 do \
81 if (yychar == YYEMPTY && yylen == 1) \
82 { yychar = (token), yylval = (value); \
83 yychar1 = YYTRANSLATE (yychar); \
84 YYPOPSTACK; \
85 goto yybackup; \
86 } \
87 else \
88 { yyerror ("syntax error: cannot back up"); YYERROR; } \
89 while (0)
90
91 #define YYTERROR 1
92 #define YYERRCODE 256
93
94 #ifndef YYPURE
95 #define YYLEX yylex()
96 #endif
97
98 #ifdef YYPURE
99 #ifdef YYLSP_NEEDED
100 #ifdef YYLEX_PARAM
101 #define YYLEX yylex(&yylval, &yylloc, YYLEX_PARAM)
102 #else
103 #define YYLEX yylex(&yylval, &yylloc)
104 #endif
105 #else /* not YYLSP_NEEDED */
106 #ifdef YYLEX_PARAM
107 #define YYLEX yylex(&yylval, YYLEX_PARAM)
108 #else
109 #define YYLEX yylex(&yylval)
110 #endif
111 #endif /* not YYLSP_NEEDED */
112 #endif
113
114 /* If nonreentrant, generate the variables here */
115
116 #ifndef YYPURE
117
118 int yychar; /* the lookahead symbol */
119 YYSTYPE yylval; /* the semantic value of the */
120 /* lookahead symbol */
121
122 #ifdef YYLSP_NEEDED
123 YYLTYPE yylloc; /* location data for the lookahead */
124 /* symbol */
125 #endif
126
127 int yynerrs; /* number of parse errors so far */
128 #endif /* not YYPURE */
129
130 #if YYDEBUG != 0
131 int yydebug; /* nonzero means print parse trace */
132 /* Since this is uninitialized, it does not stop multiple parsers
133 from coexisting. */
134 #endif
135
136 /* YYINITDEPTH indicates the initial size of the parser's stacks */
137
138 #ifndef YYINITDEPTH
139 #define YYINITDEPTH 200
140 #endif
141
142 /* YYMAXDEPTH is the maximum size the stacks can grow to
143 (effective only if the built-in stack extension method is used). */
144
145 #if YYMAXDEPTH == 0
146 #undef YYMAXDEPTH
147 #endif
148
149 #ifndef YYMAXDEPTH
150 #define YYMAXDEPTH 10000
151 #endif
152
153 /* Prevent warning if -Wstrict-prototypes. */
154 #ifdef __GNUC__
155 int yyparse (void);
156 #endif
157 \f
158 #if __GNUC__ > 1 /* GNU C and GNU C++ define this. */
159 #define __yy_memcpy(TO,FROM,COUNT) __builtin_memcpy(TO,FROM,COUNT)
160 #else /* not GNU C or C++ */
161 #ifndef __cplusplus
162
163 /* This is the most reliable way to avoid incompatibilities
164 in available built-in functions on various systems. */
165 static void
166 __yy_memcpy (to, from, count)
167 char *to;
168 char *from;
169 int count;
170 {
171 register char *f = from;
172 register char *t = to;
173 register int i = count;
174
175 while (i-- > 0)
176 *t++ = *f++;
177 }
178
179 #else /* __cplusplus */
180
181 /* This is the most reliable way to avoid incompatibilities
182 in available built-in functions on various systems. */
183 static void
184 __yy_memcpy (char *to, char *from, int count)
185 {
186 register char *t = to;
187 register char *f = from;
188 register int i = count;
189
190 while (i-- > 0)
191 *t++ = *f++;
192 }
193
194 #endif
195 #endif
196 \f
197 #line 196 "bison.simple"
198
199 /* The user can define YYPARSE_PARAM as the name of an argument to be passed
200 into yyparse. The argument should have type void *.
201 It should actually point to an object.
202 Grammar actions can access the variable by casting it
203 to the proper pointer type. */
204
205 #ifdef YYPARSE_PARAM
206 #ifdef __cplusplus
207 #define YYPARSE_PARAM_ARG void *YYPARSE_PARAM
208 #define YYPARSE_PARAM_DECL
209 #else /* not __cplusplus */
210 #define YYPARSE_PARAM_ARG YYPARSE_PARAM
211 #define YYPARSE_PARAM_DECL void *YYPARSE_PARAM;
212 #endif /* not __cplusplus */
213 #else /* not YYPARSE_PARAM */
214 #define YYPARSE_PARAM_ARG
215 #define YYPARSE_PARAM_DECL
216 #endif /* not YYPARSE_PARAM */
217
218 int
219 yyparse(YYPARSE_PARAM_ARG)
220 YYPARSE_PARAM_DECL
221 {
222 register int yystate;
223 register int yyn;
224 register short *yyssp;
225 register YYSTYPE *yyvsp;
226 int yyerrstatus; /* number of tokens to shift before error messages enabled */
227 int yychar1 = 0; /* lookahead token as an internal (translated) token number */
228
229 short yyssa[YYINITDEPTH]; /* the state stack */
230 YYSTYPE yyvsa[YYINITDEPTH]; /* the semantic value stack */
231
232 short *yyss = yyssa; /* refer to the stacks thru separate pointers */
233 YYSTYPE *yyvs = yyvsa; /* to allow yyoverflow to reallocate them elsewhere */
234
235 #ifdef YYLSP_NEEDED
236 YYLTYPE yylsa[YYINITDEPTH]; /* the location stack */
237 YYLTYPE *yyls = yylsa;
238 YYLTYPE *yylsp;
239
240 #define YYPOPSTACK (yyvsp--, yyssp--, yylsp--)
241 #else
242 #define YYPOPSTACK (yyvsp--, yyssp--)
243 #endif
244
245 int yystacksize = YYINITDEPTH;
246
247 #ifdef YYPURE
248 int yychar;
249 YYSTYPE yylval;
250 int yynerrs;
251 #ifdef YYLSP_NEEDED
252 YYLTYPE yylloc;
253 #endif
254 #endif
255
256 YYSTYPE yyval; /* the variable used to return */
257 /* semantic values from the action */
258 /* routines */
259
260 int yylen;
261
262 #if YYDEBUG != 0
263 if (yydebug)
264 fprintf(stderr, "Starting parse\n");
265 #endif
266
267 yystate = 0;
268 yyerrstatus = 0;
269 yynerrs = 0;
270 yychar = YYEMPTY; /* Cause a token to be read. */
271
272 /* Initialize stack pointers.
273 Waste one element of value and location stack
274 so that they stay on the same level as the state stack.
275 The wasted elements are never initialized. */
276
277 yyssp = yyss - 1;
278 yyvsp = yyvs;
279 #ifdef YYLSP_NEEDED
280 yylsp = yyls;
281 #endif
282
283 /* Push a new state, which is found in yystate . */
284 /* In all cases, when you get here, the value and location stacks
285 have just been pushed. so pushing a state here evens the stacks. */
286 yynewstate:
287
288 *++yyssp = yystate;
289
290 if (yyssp >= yyss + yystacksize - 1)
291 {
292 /* Give user a chance to reallocate the stack */
293 /* Use copies of these so that the &'s don't force the real ones into memory. */
294 YYSTYPE *yyvs1 = yyvs;
295 short *yyss1 = yyss;
296 #ifdef YYLSP_NEEDED
297 YYLTYPE *yyls1 = yyls;
298 #endif
299
300 /* Get the current used size of the three stacks, in elements. */
301 int size = yyssp - yyss + 1;
302
303 #ifdef yyoverflow
304 /* Each stack pointer address is followed by the size of
305 the data in use in that stack, in bytes. */
306 #ifdef YYLSP_NEEDED
307 /* This used to be a conditional around just the two extra args,
308 but that might be undefined if yyoverflow is a macro. */
309 yyoverflow("parser stack overflow",
310 &yyss1, size * sizeof (*yyssp),
311 &yyvs1, size * sizeof (*yyvsp),
312 &yyls1, size * sizeof (*yylsp),
313 &yystacksize);
314 #else
315 yyoverflow("parser stack overflow",
316 &yyss1, size * sizeof (*yyssp),
317 &yyvs1, size * sizeof (*yyvsp),
318 &yystacksize);
319 #endif
320
321 yyss = yyss1; yyvs = yyvs1;
322 #ifdef YYLSP_NEEDED
323 yyls = yyls1;
324 #endif
325 #else /* no yyoverflow */
326 /* Extend the stack our own way. */
327 if (yystacksize >= YYMAXDEPTH)
328 {
329 yyerror("parser stack overflow");
330 return 2;
331 }
332 yystacksize *= 2;
333 if (yystacksize > YYMAXDEPTH)
334 yystacksize = YYMAXDEPTH;
335 yyss = (short *) alloca (yystacksize * sizeof (*yyssp));
336 __yy_memcpy ((char *)yyss, (char *)yyss1, size * sizeof (*yyssp));
337 yyvs = (YYSTYPE *) alloca (yystacksize * sizeof (*yyvsp));
338 __yy_memcpy ((char *)yyvs, (char *)yyvs1, size * sizeof (*yyvsp));
339 #ifdef YYLSP_NEEDED
340 yyls = (YYLTYPE *) alloca (yystacksize * sizeof (*yylsp));
341 __yy_memcpy ((char *)yyls, (char *)yyls1, size * sizeof (*yylsp));
342 #endif
343 #endif /* no yyoverflow */
344
345 yyssp = yyss + size - 1;
346 yyvsp = yyvs + size - 1;
347 #ifdef YYLSP_NEEDED
348 yylsp = yyls + size - 1;
349 #endif
350
351 #if YYDEBUG != 0
352 if (yydebug)
353 fprintf(stderr, "Stack size increased to %d\n", yystacksize);
354 #endif
355
356 if (yyssp >= yyss + yystacksize - 1)
357 YYABORT;
358 }
359
360 #if YYDEBUG != 0
361 if (yydebug)
362 fprintf(stderr, "Entering state %d\n", yystate);
363 #endif
364
365 goto yybackup;
366 yybackup:
367
368 /* Do appropriate processing given the current state. */
369 /* Read a lookahead token if we need one and don't already have one. */
370 /* yyresume: */
371
372 /* First try to decide what to do without reference to lookahead token. */
373
374 yyn = yypact[yystate];
375 if (yyn == YYFLAG)
376 goto yydefault;
377
378 /* Not known => get a lookahead token if don't already have one. */
379
380 /* yychar is either YYEMPTY or YYEOF
381 or a valid token in external form. */
382
383 if (yychar == YYEMPTY)
384 {
385 #if YYDEBUG != 0
386 if (yydebug)
387 fprintf(stderr, "Reading a token: ");
388 #endif
389 yychar = YYLEX;
390 }
391
392 /* Convert token to internal form (in yychar1) for indexing tables with */
393
394 if (yychar <= 0) /* This means end of input. */
395 {
396 yychar1 = 0;
397 yychar = YYEOF; /* Don't call YYLEX any more */
398
399 #if YYDEBUG != 0
400 if (yydebug)
401 fprintf(stderr, "Now at end of input.\n");
402 #endif
403 }
404 else
405 {
406 yychar1 = YYTRANSLATE(yychar);
407
408 #if YYDEBUG != 0
409 if (yydebug)
410 {
411 fprintf (stderr, "Next token is %d (%s", yychar, yytname[yychar1]);
412 /* Give the individual parser a way to print the precise meaning
413 of a token, for further debugging info. */
414 #ifdef YYPRINT
415 YYPRINT (stderr, yychar, yylval);
416 #endif
417 fprintf (stderr, ")\n");
418 }
419 #endif
420 }
421
422 yyn += yychar1;
423 if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != yychar1)
424 goto yydefault;
425
426 yyn = yytable[yyn];
427
428 /* yyn is what to do for this token type in this state.
429 Negative => reduce, -yyn is rule number.
430 Positive => shift, yyn is new state.
431 New state is final state => don't bother to shift,
432 just return success.
433 0, or most negative number => error. */
434
435 if (yyn < 0)
436 {
437 if (yyn == YYFLAG)
438 goto yyerrlab;
439 yyn = -yyn;
440 goto yyreduce;
441 }
442 else if (yyn == 0)
443 goto yyerrlab;
444
445 if (yyn == YYFINAL)
446 YYACCEPT;
447
448 /* Shift the lookahead token. */
449
450 #if YYDEBUG != 0
451 if (yydebug)
452 fprintf(stderr, "Shifting token %d (%s), ", yychar, yytname[yychar1]);
453 #endif
454
455 /* Discard the token being shifted unless it is eof. */
456 if (yychar != YYEOF)
457 yychar = YYEMPTY;
458
459 *++yyvsp = yylval;
460 #ifdef YYLSP_NEEDED
461 *++yylsp = yylloc;
462 #endif
463
464 /* count tokens shifted since error; after three, turn off error status. */
465 if (yyerrstatus) yyerrstatus--;
466
467 yystate = yyn;
468 goto yynewstate;
469
470 /* Do the default action for the current state. */
471 yydefault:
472
473 yyn = yydefact[yystate];
474 if (yyn == 0)
475 goto yyerrlab;
476
477 /* Do a reduction. yyn is the number of a rule to reduce with. */
478 yyreduce:
479 yylen = yyr2[yyn];
480 if (yylen > 0)
481 yyval = yyvsp[1-yylen]; /* implement default value of the action */
482
483 #if YYDEBUG != 0
484 if (yydebug)
485 {
486 int i;
487
488 fprintf (stderr, "Reducing via rule %d (line %d), ",
489 yyn, yyrline[yyn]);
490
491 /* Print the symbols being reduced, and their result. */
492 for (i = yyprhs[yyn]; yyrhs[i] > 0; i++)
493 fprintf (stderr, "%s ", yytname[yyrhs[i]]);
494 fprintf (stderr, " -> %s\n", yytname[yyr1[yyn]]);
495 }
496 #endif
497
498 $ /* the action file gets copied in in place of this dollarsign */
499 #line 498 "bison.simple"
500 \f
501 yyvsp -= yylen;
502 yyssp -= yylen;
503 #ifdef YYLSP_NEEDED
504 yylsp -= yylen;
505 #endif
506
507 #if YYDEBUG != 0
508 if (yydebug)
509 {
510 short *ssp1 = yyss - 1;
511 fprintf (stderr, "state stack now");
512 while (ssp1 != yyssp)
513 fprintf (stderr, " %d", *++ssp1);
514 fprintf (stderr, "\n");
515 }
516 #endif
517
518 *++yyvsp = yyval;
519
520 #ifdef YYLSP_NEEDED
521 yylsp++;
522 if (yylen == 0)
523 {
524 yylsp->first_line = yylloc.first_line;
525 yylsp->first_column = yylloc.first_column;
526 yylsp->last_line = (yylsp-1)->last_line;
527 yylsp->last_column = (yylsp-1)->last_column;
528 yylsp->text = 0;
529 }
530 else
531 {
532 yylsp->last_line = (yylsp+yylen-1)->last_line;
533 yylsp->last_column = (yylsp+yylen-1)->last_column;
534 }
535 #endif
536
537 /* Now "shift" the result of the reduction.
538 Determine what state that goes to,
539 based on the state we popped back to
540 and the rule number reduced by. */
541
542 yyn = yyr1[yyn];
543
544 yystate = yypgoto[yyn - YYNTBASE] + *yyssp;
545 if (yystate >= 0 && yystate <= YYLAST && yycheck[yystate] == *yyssp)
546 yystate = yytable[yystate];
547 else
548 yystate = yydefgoto[yyn - YYNTBASE];
549
550 goto yynewstate;
551
552 yyerrlab: /* here on detecting error */
553
554 if (! yyerrstatus)
555 /* If not already recovering from an error, report this error. */
556 {
557 ++yynerrs;
558
559 #ifdef YYERROR_VERBOSE
560 yyn = yypact[yystate];
561
562 if (yyn > YYFLAG && yyn < YYLAST)
563 {
564 int size = 0;
565 char *msg;
566 int x, count;
567
568 count = 0;
569 /* Start X at -yyn if nec to avoid negative indexes in yycheck. */
570 for (x = (yyn < 0 ? -yyn : 0);
571 x < (sizeof(yytname) / sizeof(char *)); x++)
572 if (yycheck[x + yyn] == x)
573 size += strlen(yytname[x]) + 15, count++;
574 msg = (char *) malloc(size + 15);
575 if (msg != 0)
576 {
577 strcpy(msg, "parse error");
578
579 if (count < 5)
580 {
581 count = 0;
582 for (x = (yyn < 0 ? -yyn : 0);
583 x < (sizeof(yytname) / sizeof(char *)); x++)
584 if (yycheck[x + yyn] == x)
585 {
586 strcat(msg, count == 0 ? ", expecting `" : " or `");
587 strcat(msg, yytname[x]);
588 strcat(msg, "'");
589 count++;
590 }
591 }
592 yyerror(msg);
593 free(msg);
594 }
595 else
596 yyerror ("parse error; also virtual memory exceeded");
597 }
598 else
599 #endif /* YYERROR_VERBOSE */
600 yyerror("parse error");
601 }
602
603 goto yyerrlab1;
604 yyerrlab1: /* here on error raised explicitly by an action */
605
606 if (yyerrstatus == 3)
607 {
608 /* if just tried and failed to reuse lookahead token after an error, discard it. */
609
610 /* return failure if at end of input */
611 if (yychar == YYEOF)
612 YYABORT;
613
614 #if YYDEBUG != 0
615 if (yydebug)
616 fprintf(stderr, "Discarding token %d (%s).\n", yychar, yytname[yychar1]);
617 #endif
618
619 yychar = YYEMPTY;
620 }
621
622 /* Else will try to reuse lookahead token
623 after shifting the error token. */
624
625 yyerrstatus = 3; /* Each real token shifted decrements this */
626
627 goto yyerrhandle;
628
629 yyerrdefault: /* current state does not do anything special for the error token. */
630
631 #if 0
632 /* This is wrong; only states that explicitly want error tokens
633 should shift them. */
634 yyn = yydefact[yystate]; /* If its default is to accept any token, ok. Otherwise pop it.*/
635 if (yyn) goto yydefault;
636 #endif
637
638 yyerrpop: /* pop the current state because it cannot handle the error token */
639
640 if (yyssp == yyss) YYABORT;
641 yyvsp--;
642 yystate = *--yyssp;
643 #ifdef YYLSP_NEEDED
644 yylsp--;
645 #endif
646
647 #if YYDEBUG != 0
648 if (yydebug)
649 {
650 short *ssp1 = yyss - 1;
651 fprintf (stderr, "Error: state stack now");
652 while (ssp1 != yyssp)
653 fprintf (stderr, " %d", *++ssp1);
654 fprintf (stderr, "\n");
655 }
656 #endif
657
658 yyerrhandle:
659
660 yyn = yypact[yystate];
661 if (yyn == YYFLAG)
662 goto yyerrdefault;
663
664 yyn += YYTERROR;
665 if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != YYTERROR)
666 goto yyerrdefault;
667
668 yyn = yytable[yyn];
669 if (yyn < 0)
670 {
671 if (yyn == YYFLAG)
672 goto yyerrpop;
673 yyn = -yyn;
674 goto yyreduce;
675 }
676 else if (yyn == 0)
677 goto yyerrpop;
678
679 if (yyn == YYFINAL)
680 YYACCEPT;
681
682 #if YYDEBUG != 0
683 if (yydebug)
684 fprintf(stderr, "Shifting error token, ");
685 #endif
686
687 *++yyvsp = yylval;
688 #ifdef YYLSP_NEEDED
689 *++yylsp = yylloc;
690 #endif
691
692 yystate = yyn;
693 goto yynewstate;
694 }