main.c revision 1.1.1.6 1 /* $NetBSD: main.c,v 1.1.1.6 2015/01/03 22:58:23 christos Exp $ */
2
3 /* Id: main.c,v 1.54 2014/10/06 22:40:07 tom Exp */
4
5 #include <signal.h>
6 #ifndef _WIN32
7 #include <unistd.h> /* for _exit() */
8 #else
9 #include <stdlib.h> /* for _exit() */
10 #endif
11
12 #include "defs.h"
13
14 #ifdef HAVE_MKSTEMP
15 # define USE_MKSTEMP 1
16 #elif defined(HAVE_FCNTL_H)
17 # define USE_MKSTEMP 1
18 # include <fcntl.h> /* for open(), O_EXCL, etc. */
19 #else
20 # define USE_MKSTEMP 0
21 #endif
22
23 #if USE_MKSTEMP
24 #include <sys/types.h>
25 #include <sys/stat.h>
26
27 typedef struct _my_tmpfiles
28 {
29 struct _my_tmpfiles *next;
30 char *name;
31 }
32 MY_TMPFILES;
33
34 static MY_TMPFILES *my_tmpfiles;
35 #endif /* USE_MKSTEMP */
36
37 char dflag;
38 char gflag;
39 char iflag;
40 char lflag;
41 static char oflag;
42 char rflag;
43 char sflag;
44 char tflag;
45 char vflag;
46
47 const char *symbol_prefix;
48 const char *myname = "yacc";
49
50 int lineno;
51 int outline;
52
53 static char empty_string[] = "";
54 static char default_file_prefix[] = "y";
55
56 static char *file_prefix = default_file_prefix;
57
58 char *code_file_name;
59 char *input_file_name = empty_string;
60 char *defines_file_name;
61 char *externs_file_name;
62
63 static char *graph_file_name;
64 static char *output_file_name;
65 static char *verbose_file_name;
66
67 FILE *action_file; /* a temp file, used to save actions associated */
68 /* with rules until the parser is written */
69 FILE *code_file; /* y.code.c (used when the -r option is specified) */
70 FILE *defines_file; /* y.tab.h */
71 FILE *externs_file; /* y.tab.i */
72 FILE *input_file; /* the input file */
73 FILE *output_file; /* y.tab.c */
74 FILE *text_file; /* a temp file, used to save text until all */
75 /* symbols have been defined */
76 FILE *union_file; /* a temp file, used to save the union */
77 /* definition until all symbol have been */
78 /* defined */
79 FILE *verbose_file; /* y.output */
80 FILE *graph_file; /* y.dot */
81
82 Value_t nitems;
83 Value_t nrules;
84 Value_t nsyms;
85 Value_t ntokens;
86 Value_t nvars;
87
88 Value_t start_symbol;
89 char **symbol_name;
90 char **symbol_pname;
91 Value_t *symbol_value;
92 Value_t *symbol_prec;
93 char *symbol_assoc;
94
95 int pure_parser;
96 int token_table;
97
98 #if defined(YYBTYACC)
99 Value_t *symbol_pval;
100 char **symbol_destructor;
101 char **symbol_type_tag;
102 int locations = 0; /* default to no position processing */
103 int backtrack = 0; /* default is no backtracking */
104 #endif
105
106 int exit_code;
107
108 Value_t *ritem;
109 Value_t *rlhs;
110 Value_t *rrhs;
111 Value_t *rprec;
112 Assoc_t *rassoc;
113 Value_t **derives;
114 char *nullable;
115
116 /*
117 * Since fclose() is called via the signal handler, it might die. Don't loop
118 * if there is a problem closing a file.
119 */
120 #define DO_CLOSE(fp) \
121 if (fp != 0) { \
122 FILE *use = fp; \
123 fp = 0; \
124 fclose(use); \
125 }
126
127 static int got_intr = 0;
128
129 void
130 done(int k)
131 {
132 DO_CLOSE(input_file);
133 DO_CLOSE(output_file);
134 if (iflag)
135 DO_CLOSE(externs_file);
136 if (rflag)
137 DO_CLOSE(code_file);
138
139 DO_CLOSE(action_file);
140 DO_CLOSE(defines_file);
141 DO_CLOSE(graph_file);
142 DO_CLOSE(text_file);
143 DO_CLOSE(union_file);
144 DO_CLOSE(verbose_file);
145
146 if (got_intr)
147 _exit(EXIT_FAILURE);
148
149 #ifdef NO_LEAKS
150 if (rflag)
151 DO_FREE(code_file_name);
152
153 if (dflag)
154 DO_FREE(defines_file_name);
155
156 if (iflag)
157 DO_FREE(externs_file_name);
158
159 if (oflag)
160 DO_FREE(output_file_name);
161
162 if (vflag)
163 DO_FREE(verbose_file_name);
164
165 if (gflag)
166 DO_FREE(graph_file_name);
167
168 lr0_leaks();
169 lalr_leaks();
170 mkpar_leaks();
171 mstring_leaks();
172 output_leaks();
173 reader_leaks();
174 #endif
175
176 exit(k);
177 }
178
179 static void
180 onintr(int sig GCC_UNUSED)
181 {
182 got_intr = 1;
183 done(EXIT_FAILURE);
184 }
185
186 static void
187 set_signals(void)
188 {
189 #ifdef SIGINT
190 if (signal(SIGINT, SIG_IGN) != SIG_IGN)
191 signal(SIGINT, onintr);
192 #endif
193 #ifdef SIGTERM
194 if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
195 signal(SIGTERM, onintr);
196 #endif
197 #ifdef SIGHUP
198 if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
199 signal(SIGHUP, onintr);
200 #endif
201 }
202
203 static void
204 usage(void)
205 {
206 static const char *msg[] =
207 {
208 ""
209 ,"Options:"
210 ," -b file_prefix set filename prefix (default \"y.\")"
211 ," -B create a backtracking parser"
212 ," -d write definitions (" DEFINES_SUFFIX ")"
213 ," -i write interface (y.tab.i)"
214 ," -g write a graphical description"
215 ," -l suppress #line directives"
216 ," -L enable position processing, e.g., \"%locations\""
217 ," -o output_file (default \"" OUTPUT_SUFFIX "\")"
218 ," -p symbol_prefix set symbol prefix (default \"yy\")"
219 ," -P create a reentrant parser, e.g., \"%pure-parser\""
220 ," -r produce separate code and table files (y.code.c)"
221 ," -s suppress #define's for quoted names in %token lines"
222 ," -t add debugging support"
223 ," -v write description (y.output)"
224 ," -V show version information and exit"
225 };
226 unsigned n;
227
228 fflush(stdout);
229 fprintf(stderr, "Usage: %s [options] filename\n", myname);
230 for (n = 0; n < sizeof(msg) / sizeof(msg[0]); ++n)
231 fprintf(stderr, "%s\n", msg[n]);
232
233 exit(1);
234 }
235
236 static void
237 setflag(int ch)
238 {
239 switch (ch)
240 {
241 case 'B':
242 #if defined(YYBTYACC)
243 backtrack = 1;
244 #else
245 unsupported_flag_warning("-B", "reconfigure with --enable-btyacc");
246 #endif
247 break;
248
249 case 'd':
250 dflag = 1;
251 break;
252
253 case 'g':
254 gflag = 1;
255 break;
256
257 case 'i':
258 iflag = 1;
259 break;
260
261 case 'l':
262 lflag = 1;
263 break;
264
265 case 'L':
266 #if defined(YYBTYACC)
267 locations = 1;
268 #else
269 unsupported_flag_warning("-B", "reconfigure with --enable-btyacc");
270 #endif
271 break;
272
273 case 'P':
274 pure_parser = 1;
275 break;
276
277 case 'r':
278 rflag = 1;
279 break;
280
281 case 's':
282 sflag = 1;
283 break;
284
285 case 't':
286 tflag = 1;
287 break;
288
289 case 'v':
290 vflag = 1;
291 break;
292
293 case 'V':
294 printf("%s - %s\n", myname, VERSION);
295 exit(EXIT_SUCCESS);
296
297 case 'y':
298 /* noop for bison compatibility. byacc is already designed to be posix
299 * yacc compatible. */
300 break;
301
302 default:
303 usage();
304 }
305 }
306
307 static void
308 getargs(int argc, char *argv[])
309 {
310 int i;
311 char *s;
312 int ch;
313
314 if (argc > 0)
315 myname = argv[0];
316
317 for (i = 1; i < argc; ++i)
318 {
319 s = argv[i];
320 if (*s != '-')
321 break;
322 switch (ch = *++s)
323 {
324 case '\0':
325 input_file = stdin;
326 if (i + 1 < argc)
327 usage();
328 return;
329
330 case '-':
331 ++i;
332 goto no_more_options;
333
334 case 'b':
335 if (*++s)
336 file_prefix = s;
337 else if (++i < argc)
338 file_prefix = argv[i];
339 else
340 usage();
341 continue;
342
343 case 'o':
344 if (*++s)
345 output_file_name = s;
346 else if (++i < argc)
347 output_file_name = argv[i];
348 else
349 usage();
350 continue;
351
352 case 'p':
353 if (*++s)
354 symbol_prefix = s;
355 else if (++i < argc)
356 symbol_prefix = argv[i];
357 else
358 usage();
359 continue;
360
361 default:
362 setflag(ch);
363 break;
364 }
365
366 for (;;)
367 {
368 switch (ch = *++s)
369 {
370 case '\0':
371 goto end_of_option;
372
373 default:
374 setflag(ch);
375 break;
376 }
377 }
378 end_of_option:;
379 }
380
381 no_more_options:;
382 if (i + 1 != argc)
383 usage();
384 input_file_name = argv[i];
385 }
386
387 void *
388 allocate(size_t n)
389 {
390 void *p;
391
392 p = NULL;
393 if (n)
394 {
395 p = CALLOC(1, n);
396 NO_SPACE(p);
397 }
398 return (p);
399 }
400
401 #define CREATE_FILE_NAME(dest, suffix) \
402 dest = alloc_file_name(len, suffix)
403
404 static char *
405 alloc_file_name(size_t len, const char *suffix)
406 {
407 char *result = TMALLOC(char, len + strlen(suffix) + 1);
408 if (result == 0)
409 no_space();
410 strcpy(result, file_prefix);
411 strcpy(result + len, suffix);
412 return result;
413 }
414
415 static void
416 create_file_names(void)
417 {
418 size_t len;
419 const char *defines_suffix;
420 const char *externs_suffix;
421 char *prefix;
422
423 prefix = NULL;
424 defines_suffix = DEFINES_SUFFIX;
425 externs_suffix = EXTERNS_SUFFIX;
426
427 /* compute the file_prefix from the user provided output_file_name */
428 if (output_file_name != 0)
429 {
430 if (!(prefix = strstr(output_file_name, OUTPUT_SUFFIX))
431 && (prefix = strstr(output_file_name, ".c")))
432 {
433 defines_suffix = ".h";
434 externs_suffix = ".i";
435 }
436 }
437
438 if (prefix != NULL)
439 {
440 len = (size_t) (prefix - output_file_name);
441 file_prefix = TMALLOC(char, len + 1);
442 NO_SPACE(file_prefix);
443 strncpy(file_prefix, output_file_name, len)[len] = 0;
444 }
445 else
446 len = strlen(file_prefix);
447
448 /* if "-o filename" was not given */
449 if (output_file_name == 0)
450 {
451 oflag = 1;
452 CREATE_FILE_NAME(output_file_name, OUTPUT_SUFFIX);
453 }
454
455 if (rflag)
456 {
457 CREATE_FILE_NAME(code_file_name, CODE_SUFFIX);
458 }
459 else
460 code_file_name = output_file_name;
461
462 if (dflag)
463 {
464 CREATE_FILE_NAME(defines_file_name, defines_suffix);
465 }
466
467 if (iflag)
468 {
469 CREATE_FILE_NAME(externs_file_name, externs_suffix);
470 }
471
472 if (vflag)
473 {
474 CREATE_FILE_NAME(verbose_file_name, VERBOSE_SUFFIX);
475 }
476
477 if (gflag)
478 {
479 CREATE_FILE_NAME(graph_file_name, GRAPH_SUFFIX);
480 }
481
482 if (prefix != NULL)
483 {
484 FREE(file_prefix);
485 }
486 }
487
488 #if USE_MKSTEMP
489 static void
490 close_tmpfiles(void)
491 {
492 while (my_tmpfiles != 0)
493 {
494 MY_TMPFILES *next = my_tmpfiles->next;
495
496 (void)chmod(my_tmpfiles->name, 0644);
497 (void)unlink(my_tmpfiles->name);
498
499 free(my_tmpfiles->name);
500 free(my_tmpfiles);
501
502 my_tmpfiles = next;
503 }
504 }
505
506 #ifndef HAVE_MKSTEMP
507 static int
508 my_mkstemp(char *temp)
509 {
510 int fd;
511 char *dname;
512 char *fname;
513 char *name;
514
515 /*
516 * Split-up to use tempnam, rather than tmpnam; the latter (like
517 * mkstemp) is unusable on Windows.
518 */
519 if ((fname = strrchr(temp, '/')) != 0)
520 {
521 dname = strdup(temp);
522 dname[++fname - temp] = '\0';
523 }
524 else
525 {
526 dname = 0;
527 fname = temp;
528 }
529 if ((name = tempnam(dname, fname)) != 0)
530 {
531 fd = open(name, O_CREAT | O_EXCL | O_RDWR);
532 strcpy(temp, name);
533 }
534 else
535 {
536 fd = -1;
537 }
538
539 if (dname != 0)
540 free(dname);
541
542 return fd;
543 }
544 #define mkstemp(s) my_mkstemp(s)
545 #endif
546
547 #endif
548
549 /*
550 * tmpfile() should be adequate, except that it may require special privileges
551 * to use, e.g., MinGW and Windows 7 where it tries to use the root directory.
552 */
553 static FILE *
554 open_tmpfile(const char *label)
555 {
556 FILE *result;
557 #if USE_MKSTEMP
558 int fd;
559 const char *tmpdir;
560 char *name;
561 const char *mark;
562
563 if ((tmpdir = getenv("TMPDIR")) == 0 || access(tmpdir, W_OK) != 0)
564 {
565 #ifdef P_tmpdir
566 tmpdir = P_tmpdir;
567 #else
568 tmpdir = "/tmp";
569 #endif
570 if (access(tmpdir, W_OK) != 0)
571 tmpdir = ".";
572 }
573
574 name = malloc(strlen(tmpdir) + 10 + strlen(label));
575
576 result = 0;
577 if (name != 0)
578 {
579 mode_t save_umask = umask(0177);
580
581 if ((mark = strrchr(label, '_')) == 0)
582 mark = label + strlen(label);
583
584 sprintf(name, "%s/%.*sXXXXXX", tmpdir, (int)(mark - label), label);
585 fd = mkstemp(name);
586 if (fd >= 0)
587 {
588 result = fdopen(fd, "w+");
589 if (result != 0)
590 {
591 MY_TMPFILES *item;
592
593 if (my_tmpfiles == 0)
594 {
595 atexit(close_tmpfiles);
596 }
597
598 item = NEW(MY_TMPFILES);
599 NO_SPACE(item);
600
601 item->name = name;
602 NO_SPACE(item->name);
603
604 item->next = my_tmpfiles;
605 my_tmpfiles = item;
606 }
607 }
608 (void)umask(save_umask);
609 }
610 #else
611 result = tmpfile();
612 #endif
613
614 if (result == 0)
615 open_error(label);
616 return result;
617 }
618
619 static void
620 open_files(void)
621 {
622 create_file_names();
623
624 if (input_file == 0)
625 {
626 input_file = fopen(input_file_name, "r");
627 if (input_file == 0)
628 open_error(input_file_name);
629 }
630
631 action_file = open_tmpfile("action_file");
632 text_file = open_tmpfile("text_file");
633
634 if (vflag)
635 {
636 verbose_file = fopen(verbose_file_name, "w");
637 if (verbose_file == 0)
638 open_error(verbose_file_name);
639 }
640
641 if (gflag)
642 {
643 graph_file = fopen(graph_file_name, "w");
644 if (graph_file == 0)
645 open_error(graph_file_name);
646 fprintf(graph_file, "digraph %s {\n", file_prefix);
647 fprintf(graph_file, "\tedge [fontsize=10];\n");
648 fprintf(graph_file, "\tnode [shape=box,fontsize=10];\n");
649 fprintf(graph_file, "\torientation=landscape;\n");
650 fprintf(graph_file, "\trankdir=LR;\n");
651 fprintf(graph_file, "\t/*\n");
652 fprintf(graph_file, "\tmargin=0.2;\n");
653 fprintf(graph_file, "\tpage=\"8.27,11.69\"; // for A4 printing\n");
654 fprintf(graph_file, "\tratio=auto;\n");
655 fprintf(graph_file, "\t*/\n");
656 }
657
658 if (dflag)
659 {
660 defines_file = fopen(defines_file_name, "w");
661 if (defines_file == 0)
662 open_error(defines_file_name);
663 union_file = open_tmpfile("union_file");
664 }
665
666 if (iflag)
667 {
668 externs_file = fopen(externs_file_name, "w");
669 if (externs_file == 0)
670 open_error(externs_file_name);
671 }
672
673 output_file = fopen(output_file_name, "w");
674 if (output_file == 0)
675 open_error(output_file_name);
676
677 if (rflag)
678 {
679 code_file = fopen(code_file_name, "w");
680 if (code_file == 0)
681 open_error(code_file_name);
682 }
683 else
684 code_file = output_file;
685 }
686
687 int
688 main(int argc, char *argv[])
689 {
690 SRexpect = -1;
691 RRexpect = -1;
692 exit_code = EXIT_SUCCESS;
693
694 set_signals();
695 getargs(argc, argv);
696 open_files();
697 reader();
698 lr0();
699 lalr();
700 make_parser();
701 graph();
702 finalize_closure();
703 verbose();
704 output();
705 done(exit_code);
706 /*NOTREACHED */
707 }
708