main.c revision 1.43
1 /* $OpenBSD: main.c,v 1.77 2009/10/14 17:19:47 sthen Exp $ */ 2 /* $NetBSD: main.c,v 1.43 2016/01/16 18:31:29 christos Exp $ */ 3 4 /*- 5 * Copyright (c) 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Ozan Yigit at York University. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 /* 37 * main.c 38 * Facility: m4 macro processor 39 * by: oz 40 */ 41 #if HAVE_NBTOOL_CONFIG_H 42 #include "nbtool_config.h" 43 #endif 44 #include <sys/cdefs.h> 45 __RCSID("$NetBSD: main.c,v 1.43 2016/01/16 18:31:29 christos Exp $"); 46 #include <assert.h> 47 #include <signal.h> 48 #include <getopt.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <unistd.h> 52 #include <stdio.h> 53 #include <ctype.h> 54 #include <string.h> 55 #include <stddef.h> 56 #include <stdint.h> 57 #include <stdlib.h> 58 #include <ohash.h> 59 #include "mdef.h" 60 #include "stdd.h" 61 #include "extern.h" 62 #include "pathnames.h" 63 64 ndptr hashtab[HASHSIZE]; /* hash table for macros etc. */ 65 stae *mstack; /* stack of m4 machine */ 66 char *sstack; /* shadow stack, for string space extension */ 67 static size_t STACKMAX; /* current maximum size of stack */ 68 int sp; /* current m4 stack pointer */ 69 int fp; /* m4 call frame pointer */ 70 struct input_file infile[MAXINP];/* input file stack (0=stdin) */ 71 FILE **outfile; /* diversion array(0=bitbucket)*/ 72 int maxout; 73 FILE *active; /* active output file pointer */ 74 int ilevel = 0; /* input file stack pointer */ 75 int oindex = 0; /* diversion index.. */ 76 const char *null = ""; /* as it says.. just a null.. */ 77 char **m4wraps = NULL; /* m4wraps array. */ 78 int maxwraps = 0; /* size of m4wraps array */ 79 int wrapindex = 0; /* current offset in m4wraps */ 80 char lquote[MAXCCHARS+1] = {LQUOTE}; /* left quote character (`) */ 81 char rquote[MAXCCHARS+1] = {RQUOTE}; /* right quote character (') */ 82 char scommt[MAXCCHARS+1] = {SCOMMT}; /* start character for comment */ 83 char ecommt[MAXCCHARS+1] = {ECOMMT}; /* end character for comment */ 84 int synch_lines = 0; /* line synchronisation for C preprocessor */ 85 int prefix_builtins = 0; /* -P option to prefix builtin keywords */ 86 int fatal_warnings = 0; /* -E option to exit on warnings */ 87 int quiet = 0; /* -Q option to silence warnings */ 88 int nesting_limit = -1; /* -L for nesting limit */ 89 const char *freeze = NULL; /* -F to freeze state */ 90 const char *reload = NULL; /* -R to reload state */ 91 #ifndef REAL_FREEZE 92 FILE *freezef = NULL; 93 int thawing = 0; 94 #endif 95 96 struct keyblk { 97 const char *knam; /* keyword name */ 98 int ktyp; /* keyword type */ 99 }; 100 101 struct keyblk keywrds[] = { /* m4 keywords to be installed */ 102 { "include", INCLTYPE }, 103 { "sinclude", SINCTYPE }, 104 { "define", DEFITYPE }, 105 { "defn", DEFNTYPE }, 106 { "divert", DIVRTYPE | NOARGS }, 107 { "expr", EXPRTYPE }, 108 { "eval", EXPRTYPE }, 109 { "substr", SUBSTYPE }, 110 { "ifelse", IFELTYPE }, 111 { "ifdef", IFDFTYPE }, 112 { "len", LENGTYPE }, 113 { "incr", INCRTYPE }, 114 { "decr", DECRTYPE }, 115 { "dnl", DNLNTYPE | NOARGS }, 116 { "changequote", CHNQTYPE | NOARGS }, 117 { "changecom", CHNCTYPE | NOARGS }, 118 { "index", INDXTYPE }, 119 #ifdef EXTENDED 120 { "paste", PASTTYPE }, 121 { "spaste", SPASTYPE }, 122 /* Newer extensions, needed to handle gnu-m4 scripts */ 123 { "indir", INDIRTYPE}, 124 { "builtin", BUILTINTYPE}, 125 { "patsubst", PATSTYPE}, 126 { "regexp", REGEXPTYPE}, 127 { "esyscmd", ESYSCMDTYPE}, 128 { "__file__", FILENAMETYPE | NOARGS}, 129 { "__line__", LINETYPE | NOARGS}, 130 #endif 131 { "popdef", POPDTYPE }, 132 { "pushdef", PUSDTYPE }, 133 { "dumpdef", DUMPTYPE | NOARGS }, 134 { "shift", SHIFTYPE | NOARGS }, 135 { "translit", TRNLTYPE }, 136 { "undefine", UNDFTYPE }, 137 { "undivert", UNDVTYPE | NOARGS }, 138 { "divnum", DIVNTYPE | NOARGS }, 139 { "maketemp", MKTMTYPE }, 140 { "errprint", ERRPTYPE | NOARGS }, 141 { "m4wrap", M4WRTYPE | NOARGS }, 142 { "m4exit", EXITTYPE | NOARGS }, 143 { "syscmd", SYSCTYPE }, 144 { "sysval", SYSVTYPE | NOARGS }, 145 { "traceon", TRACEONTYPE | NOARGS }, 146 { "traceoff", TRACEOFFTYPE | NOARGS }, 147 148 #if defined(unix) || defined(__unix__) 149 { "unix", SELFTYPE | NOARGS }, 150 #else 151 #ifdef vms 152 { "vms", SELFTYPE | NOARGS }, 153 #endif 154 #endif 155 }; 156 157 #define MAXKEYS (sizeof(keywrds)/sizeof(struct keyblk)) 158 159 #define MAXRECORD 50 160 static struct position { 161 char *name; 162 unsigned long line; 163 } quotes[MAXRECORD], paren[MAXRECORD]; 164 165 static void record(struct position *, int); 166 static void dump_stack(struct position *, int); 167 168 static void macro(void); 169 static void initkwds(void); 170 static ndptr inspect(int, char *); 171 static int do_look_ahead(int, const char *); 172 static void reallyoutputstr(const char *); 173 static void reallyputchar(int); 174 175 static void enlarge_stack(void); 176 static void help(void); 177 178 static void 179 usage(FILE *f) 180 { 181 fprintf(f, "Usage: %s [-EGgiPQsv] [-Dname[=value]] [-d flags] " 182 "[-I dirname] [-o filename] [-L limit]\n" 183 "\t[-t macro] [-Uname] [file ...]\n", getprogname()); 184 } 185 186 __dead static void 187 onintr(int signo) 188 { 189 char intrmessage[] = "m4: interrupted.\n"; 190 write(STDERR_FILENO, intrmessage, sizeof(intrmessage)-1); 191 _exit(1); 192 } 193 194 #define OPT_HELP 1 195 196 struct option longopts[] = { 197 { "debug", optional_argument, 0, 'd' }, 198 { "define", required_argument, 0, 'D' }, 199 { "error-output", required_argument, 0, 'e' }, 200 { "fatal-warnings", no_argument, 0, 'E' }, 201 { "freeze-state", required_argument, 0, 'F' }, 202 { "gnu", no_argument, 0, 'g' }, 203 { "help", no_argument, 0, OPT_HELP }, 204 { "include", required_argument, 0, 'I' }, 205 { "interactive", no_argument, 0, 'i' }, 206 { "nesting-limit", required_argument, 0, 'L' }, 207 { "prefix-builtins", no_argument, 0, 'P' }, 208 { "quiet", no_argument, 0, 'Q' }, 209 { "reload-state", required_argument, 0, 'R' }, 210 { "silent", no_argument, 0, 'Q' }, 211 { "synclines", no_argument, 0, 's' }, 212 { "trace", required_argument, 0, 't' }, 213 { "traditional", no_argument, 0, 'G' }, 214 { "undefine", required_argument, 0, 'U' }, 215 { "version", no_argument, 0, 'v' }, 216 #ifdef notyet 217 { "arglength", required_argument, 0, 'l' }, 218 { "debugfile", optional_argument, 0, OPT_DEBUGFILE }, 219 { "hashsize", required_argument, 0, 'H' }, 220 { "warn-macro-sequence",optional_argument, 0, OPT_WARN_SEQUENCE }, 221 #endif 222 { 0, 0, 0, 0 }, 223 }; 224 225 int 226 main(int argc, char *argv[]) 227 { 228 int c; 229 int n; 230 char *p; 231 232 setprogname(argv[0]); 233 234 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 235 signal(SIGINT, onintr); 236 237 init_macros(); 238 initspaces(); 239 STACKMAX = INITSTACKMAX; 240 241 mstack = (stae *)xalloc(sizeof(stae) * STACKMAX, NULL); 242 sstack = (char *)xalloc(STACKMAX, NULL); 243 244 maxout = 0; 245 outfile = NULL; 246 resizedivs(MAXOUT); 247 248 while ((c = getopt_long(argc, argv, "D:d:e:EF:GgIi:L:o:PR:Qst:U:v", 249 longopts, NULL)) != -1) 250 switch(c) { 251 case 'D': /* define something..*/ 252 for (p = optarg; *p; p++) 253 if (*p == '=') 254 break; 255 if (*p) 256 *p++ = EOS; 257 dodefine(optarg, p); 258 break; 259 case 'd': 260 set_trace_flags(optarg); 261 break; 262 case 'E': 263 fatal_warnings++; 264 break; 265 case 'e': 266 if (freopen(optarg, "w+", stderr) == NULL) 267 err(EXIT_FAILURE, "Can't redirect errors to `%s'", 268 optarg); 269 break; 270 case 'F': 271 freeze = optarg; 272 #ifndef REAL_FREEZE 273 if ((freezef = fopen(freeze, "w")) == NULL) 274 err(EXIT_FAILURE, "Can't open `%s'", freeze); 275 #endif 276 break; 277 case 'I': 278 addtoincludepath(optarg); 279 break; 280 case 'i': 281 setvbuf(stdout, NULL, _IONBF, 0); 282 signal(SIGINT, SIG_IGN); 283 break; 284 case 'G': 285 mimic_gnu = 0; 286 break; 287 case 'g': 288 mimic_gnu = 1; 289 break; 290 case 'L': 291 nesting_limit = atoi(optarg); 292 break; 293 case 'o': 294 trace_file(optarg); 295 break; 296 case 'P': 297 prefix_builtins = 1; 298 break; 299 case 'Q': 300 quiet++; 301 break; 302 case 'R': 303 reload = optarg; 304 break; 305 case 's': 306 synch_lines = 1; 307 break; 308 case 't': 309 mark_traced(optarg, 1); 310 break; 311 case 'U': /* undefine... */ 312 macro_popdef(optarg); 313 break; 314 case 'v': 315 fprintf(stderr, "%s version %d\n", getprogname(), 316 VERSION); 317 return EXIT_SUCCESS; 318 case OPT_HELP: 319 help(); 320 return EXIT_SUCCESS; 321 case '?': 322 default: 323 usage(stderr); 324 return EXIT_FAILURE; 325 } 326 327 #ifdef REDIRECT 328 if (freopen("/tmp/m4", "w+", stderr) == NULL) 329 err(EXIT_FAILURE, "Can't redirect errors to `%s'", 330 "/tmp/m4"); 331 #endif 332 argc -= optind; 333 argv += optind; 334 335 336 initkwds(); 337 if (mimic_gnu) 338 setup_builtin("format", FORMATTYPE); 339 340 active = stdout; /* default active output */ 341 bbase[0] = bufbase; 342 343 if (reload) { 344 #ifdef REAL_FREEZE 345 thaw_state(reload); 346 #else 347 if (fopen_trypath(infile, reload) == NULL) 348 err(1, "Can't open `%s'", reload); 349 sp = -1; 350 fp = 0; 351 thawing = 1; 352 macro(); 353 thawing = 0; 354 release_input(infile); 355 #endif 356 } 357 358 if (!argc) { 359 sp = -1; /* stack pointer initialized */ 360 fp = 0; /* frame pointer initialized */ 361 set_input(infile+0, stdin, "stdin"); 362 /* default input (naturally) */ 363 macro(); 364 } else 365 for (; argc--; ++argv) { 366 p = *argv; 367 if (p[0] == '-' && p[1] == EOS) 368 set_input(infile, stdin, "stdin"); 369 else if (fopen_trypath(infile, p) == NULL) 370 err(1, "%s", p); 371 sp = -1; 372 fp = 0; 373 macro(); 374 release_input(infile); 375 } 376 377 if (wrapindex) { 378 int i; 379 380 ilevel = 0; /* in case m4wrap includes.. */ 381 bufbase = bp = buf; /* use the entire buffer */ 382 if (mimic_gnu) { 383 while (wrapindex != 0) { 384 for (i = 0; i < wrapindex; i++) 385 pbstr(m4wraps[i]); 386 wrapindex =0; 387 macro(); 388 } 389 } else { 390 for (i = 0; i < wrapindex; i++) { 391 pbstr(m4wraps[i]); 392 macro(); 393 } 394 } 395 } 396 397 if (active != stdout) 398 active = stdout; /* reset output just in case */ 399 for (n = 1; n < maxout; n++) /* default wrap-up: undivert */ 400 if (outfile[n] != NULL) 401 getdiv(n); 402 /* remove bitbucket if used */ 403 if (outfile[0] != NULL) { 404 (void) fclose(outfile[0]); 405 } 406 407 #ifdef REAL_FREEZE 408 if (freeze) 409 freeze_state(freeze); 410 #else 411 if (freezef) 412 fclose(freezef); 413 #endif 414 415 return 0; 416 } 417 418 /* 419 * Look ahead for `token'. 420 * (on input `t == token[0]') 421 * Used for comment and quoting delimiters. 422 * Returns 1 if `token' present; copied to output. 423 * 0 if `token' not found; all characters pushed back 424 */ 425 static int 426 do_look_ahead(int t, const char *token) 427 { 428 int i; 429 430 assert((unsigned char)t == (unsigned char)token[0]); 431 432 for (i = 1; *++token; i++) { 433 t = gpbc(); 434 if (t == EOF || (unsigned char)t != (unsigned char)*token) { 435 pushback(t); 436 while (--i) 437 pushback(*--token); 438 return 0; 439 } 440 } 441 return 1; 442 } 443 444 #define LOOK_AHEAD(t, token) (t != EOF && \ 445 (unsigned char)(t)==(unsigned char)(token)[0] && \ 446 do_look_ahead(t,token)) 447 448 /* 449 * macro - the work horse.. 450 */ 451 static void 452 macro(void) 453 { 454 char token[MAXTOK+1]; 455 int t, l; 456 ndptr p; 457 int nlpar; 458 459 cycle { 460 t = gpbc(); 461 462 if (LOOK_AHEAD(t,lquote)) { /* strip quotes */ 463 nlpar = 0; 464 record(quotes, nlpar++); 465 /* 466 * Opening quote: scan forward until matching 467 * closing quote has been found. 468 */ 469 do { 470 471 l = gpbc(); 472 if (LOOK_AHEAD(l,rquote)) { 473 if (--nlpar > 0) 474 outputstr(rquote); 475 } else if (LOOK_AHEAD(l,lquote)) { 476 record(quotes, nlpar++); 477 outputstr(lquote); 478 } else if (l == EOF) { 479 if (!quiet) { 480 if (nlpar == 1) 481 warnx("unclosed quote:"); 482 else 483 warnx( 484 "%d unclosed quotes:", 485 nlpar); 486 dump_stack(quotes, nlpar); 487 } 488 exit(EXIT_FAILURE); 489 } else { 490 if (nlpar > 0) { 491 if (sp < 0) 492 reallyputchar(l); 493 else 494 CHRSAVE(l); 495 } 496 } 497 } 498 while (nlpar != 0); 499 } else if (sp < 0 && LOOK_AHEAD(t, scommt)) { 500 reallyoutputstr(scommt); 501 502 for(;;) { 503 t = gpbc(); 504 if (LOOK_AHEAD(t, ecommt)) { 505 reallyoutputstr(ecommt); 506 break; 507 } 508 if (t == EOF) 509 break; 510 reallyputchar(t); 511 } 512 } else if (t == '_' || isalpha(t)) { 513 p = inspect(t, token); 514 if (p != NULL) 515 pushback(l = gpbc()); 516 if (p == NULL || (l != LPAREN && 517 (macro_getdef(p)->type & NEEDARGS) != 0)) 518 outputstr(token); 519 else { 520 /* 521 * real thing.. First build a call frame: 522 */ 523 pushf(fp); /* previous call frm */ 524 pushf(macro_getdef(p)->type); /* type of the call */ 525 pushf(is_traced(p)); 526 pushf(0); /* parenthesis level */ 527 fp = sp; /* new frame pointer */ 528 /* 529 * now push the string arguments: 530 */ 531 pushs1(macro_getdef(p)->defn); /* defn string */ 532 pushs1((char *)macro_name(p)); /* macro name */ 533 pushs(ep); /* start next..*/ 534 535 if (l != LPAREN && PARLEV == 0) { 536 /* no bracks */ 537 chrsave(EOS); 538 539 if ((size_t)sp == STACKMAX) 540 errx(1, "internal stack overflow"); 541 eval((const char **) mstack+fp+1, 2, 542 CALTYP, TRACESTATUS); 543 544 ep = PREVEP; /* flush strspace */ 545 sp = PREVSP; /* previous sp.. */ 546 fp = PREVFP; /* rewind stack...*/ 547 } 548 } 549 } else if (t == EOF) { 550 if (sp > -1 && ilevel <= 0) { 551 if (!quiet) { 552 warnx("unexpected end of input, " 553 "unclosed parenthesis:"); 554 dump_stack(paren, PARLEV); 555 } 556 exit(EXIT_FAILURE); 557 } 558 if (ilevel <= 0) 559 break; /* all done thanks.. */ 560 release_input(infile+ilevel--); 561 emit_synchline(); 562 bufbase = bbase[ilevel]; 563 continue; 564 } else if (sp < 0) { /* not in a macro at all */ 565 reallyputchar(t); /* output directly.. */ 566 } 567 568 else switch(t) { 569 570 case LPAREN: 571 if (PARLEV > 0) 572 chrsave(t); 573 while (isspace(l = gpbc())) /* skip blank, tab, nl.. */ 574 if (PARLEV > 0) 575 chrsave(l); 576 pushback(l); 577 record(paren, PARLEV++); 578 break; 579 580 case RPAREN: 581 if (--PARLEV > 0) 582 chrsave(t); 583 else { /* end of argument list */ 584 chrsave(EOS); 585 586 if ((size_t)sp == STACKMAX) 587 errx(1, "internal stack overflow"); 588 589 eval((const char **) mstack+fp+1, sp-fp, 590 CALTYP, TRACESTATUS); 591 592 ep = PREVEP; /* flush strspace */ 593 sp = PREVSP; /* previous sp.. */ 594 fp = PREVFP; /* rewind stack...*/ 595 } 596 break; 597 598 case COMMA: 599 if (PARLEV == 1) { 600 chrsave(EOS); /* new argument */ 601 while (isspace(l = gpbc())) 602 ; 603 pushback(l); 604 pushs(ep); 605 } else 606 chrsave(t); 607 break; 608 609 default: 610 if (LOOK_AHEAD(t, scommt)) { 611 char *q; 612 for (q = scommt; *q; q++) 613 chrsave(*q); 614 for(;;) { 615 t = gpbc(); 616 if (LOOK_AHEAD(t, ecommt)) { 617 for (q = ecommt; *q; q++) 618 chrsave(*q); 619 break; 620 } 621 if (t == EOF) 622 break; 623 CHRSAVE(t); 624 } 625 } else 626 CHRSAVE(t); /* stack the char */ 627 break; 628 } 629 } 630 } 631 632 /* 633 * output string directly, without pushing it for reparses. 634 */ 635 void 636 outputstr(const char *s) 637 { 638 if (sp < 0) 639 reallyoutputstr(s); 640 else 641 while (*s) 642 CHRSAVE(*s++); 643 } 644 645 void 646 reallyoutputstr(const char *s) 647 { 648 if (synch_lines) { 649 while (*s) { 650 fputc(*s, active); 651 if (*s++ == '\n') { 652 infile[ilevel].synch_lineno++; 653 if (infile[ilevel].synch_lineno != 654 infile[ilevel].lineno) 655 do_emit_synchline(); 656 } 657 } 658 } else 659 fputs(s, active); 660 } 661 662 void 663 reallyputchar(int c) 664 { 665 putc(c, active); 666 if (synch_lines && c == '\n') { 667 infile[ilevel].synch_lineno++; 668 if (infile[ilevel].synch_lineno != infile[ilevel].lineno) 669 do_emit_synchline(); 670 } 671 } 672 673 /* 674 * build an input token.. 675 * consider only those starting with _ or A-Za-z. 676 */ 677 static ndptr 678 inspect(int c, char *tp) 679 { 680 char *name = tp; 681 char *etp = tp+MAXTOK; 682 ndptr p; 683 684 *tp++ = c; 685 686 while ((isalnum(c = gpbc()) || c == '_') && tp < etp) 687 *tp++ = c; 688 if (c != EOF) 689 PUSHBACK(c); 690 *tp = EOS; 691 /* token is too long, it won't match anything, but it can still 692 * be output. */ 693 if (tp == ep) { 694 outputstr(name); 695 while (isalnum(c = gpbc()) || c == '_') { 696 if (sp < 0) 697 reallyputchar(c); 698 else 699 CHRSAVE(c); 700 } 701 *name = EOS; 702 return NULL; 703 } 704 705 p = ohash_find(¯os, ohash_qlookupi(¯os, name, (void *)&tp)); 706 if (p == NULL) 707 return NULL; 708 if (macro_getdef(p) == NULL) 709 return NULL; 710 return p; 711 } 712 713 /* 714 * initkwds - initialise m4 keywords as fast as possible. 715 * This very similar to install, but without certain overheads, 716 * such as calling lookup. Malloc is not used for storing the 717 * keyword strings, since we simply use the static pointers 718 * within keywrds block. 719 */ 720 static void 721 initkwds(void) 722 { 723 unsigned int type; 724 size_t i; 725 726 for (i = 0; i < MAXKEYS; i++) { 727 type = keywrds[i].ktyp; 728 if ((keywrds[i].ktyp & NOARGS) == 0) 729 type |= NEEDARGS; 730 setup_builtin(keywrds[i].knam, type); 731 } 732 } 733 734 static void 735 record(struct position *t, int lev) 736 { 737 if (lev < MAXRECORD) { 738 t[lev].name = CURRENT_NAME; 739 t[lev].line = CURRENT_LINE; 740 } 741 } 742 743 static void 744 dump_stack(struct position *t, int lev) 745 { 746 int i; 747 748 for (i = 0; i < lev; i++) { 749 if (i == MAXRECORD) { 750 fprintf(stderr, " ...\n"); 751 break; 752 } 753 fprintf(stderr, " %s at line %lu\n", 754 t[i].name, t[i].line); 755 } 756 } 757 758 759 static void 760 enlarge_stack(void) 761 { 762 STACKMAX += STACKMAX/2; 763 mstack = xrealloc(mstack, sizeof(stae) * STACKMAX, 764 "Evaluation stack overflow (%lu)", 765 (unsigned long)STACKMAX); 766 sstack = xrealloc(sstack, STACKMAX, 767 "Evaluation stack overflow (%lu)", 768 (unsigned long)STACKMAX); 769 } 770 771 static const struct { 772 const char *n; 773 const char *d; 774 } nd [] = { 775 { "-d, --debug[=flags]", "set debug flags" }, 776 { "-D, --define=name[=value]", "define macro" }, 777 { "-e, --error-output=file", "send error output to file" }, 778 { "-E, --fatal-warnings", "exit on warnings" }, 779 { "-F, --freeze-state=file", "save state to file" }, 780 { "-g, --gnu", "enable gnu extensions" }, 781 { " --help", "print this message and exit" }, 782 { "-I, --include=file", "include file" }, 783 { "-i, --interactive", "unbuffer output, ignore tty signals" }, 784 { "-L, --nesting-limit=num", "macro expansion nesting limit (-1 disable)" }, 785 { "-P, --prefix-builtins", "prefix builtins with m4_" }, 786 { "-Q, --quiet", "don't print warnings" }, 787 { "-R, --reload-state=file", "restore state from file" }, 788 { "-Q, --silent", "don't print warnings" }, 789 { "-s, --synclines", "output line directives for cpp(1)" }, 790 { "-t, --trace=macro", "trace the named macro" }, 791 { "-G, --traditional", "disable gnu extensions" }, 792 { "-U, --undefine=name", "undefine the named macro" }, 793 { "-v, --version", "print the version number and exit" }, 794 }; 795 796 static void 797 help(void) 798 { 799 size_t i; 800 fprintf(stdout, "%s version %d\n\n", getprogname(), VERSION); 801 usage(stdout); 802 803 fprintf(stdout, "\nThe long options are:\n"); 804 for (i = 0; i < __arraycount(nd); i++) 805 fprintf(stdout, "\t%-25.25s\t%s\n", nd[i].n, nd[i].d); 806 } 807
Indexes created Tue Sep 23 14:10:03 GMT 2025