1 /* $OpenBSD: main.c,v 1.77 2009/10/14 17:19:47 sthen Exp $ */ 2 /* $NetBSD: main.c,v 1.48 2019/03/26 16:41:06 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 1.48 2019/03/26 16:41:06 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 FILE *sfp; 232 233 setprogname(argv[0]); 234 235 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 236 signal(SIGINT, onintr); 237 238 init_macros(); 239 initspaces(); 240 STACKMAX = INITSTACKMAX; 241 242 mstack = (stae *)xalloc(sizeof(stae) * STACKMAX, NULL); 243 sstack = (char *)xalloc(STACKMAX, NULL); 244 245 maxout = 0; 246 outfile = NULL; 247 resizedivs(MAXOUT); 248 249 while ((c = getopt_long(argc, argv, "D:d:e:EF:GgI:iL:o:PR:Qst:U:v", 250 longopts, NULL)) != -1) 251 switch(c) { 252 case 'D': /* define something..*/ 253 for (p = optarg; *p; p++) 254 if (*p == '=') 255 break; 256 if (*p) 257 *p++ = EOS; 258 dodefine(optarg, p); 259 break; 260 case 'd': 261 set_trace_flags(optarg); 262 break; 263 case 'E': 264 fatal_warnings++; 265 break; 266 case 'e': 267 /* 268 * Don't use freopen here because if it fails 269 * we lose stderr, instead trash it. 270 */ 271 if ((sfp = fopen(optarg, "w+")) == NULL) { 272 warn("Can't redirect errors to `%s'", optarg); 273 break; 274 } 275 fclose(stderr); 276 memcpy(stderr, sfp, sizeof(*sfp)); 277 break; 278 case 'F': 279 freeze = optarg; 280 #ifndef REAL_FREEZE 281 if ((freezef = fopen(freeze, "w")) == NULL) 282 err(EXIT_FAILURE, "Can't open `%s'", freeze); 283 #endif 284 break; 285 case 'I': 286 addtoincludepath(optarg); 287 break; 288 case 'i': 289 setvbuf(stdout, NULL, _IONBF, 0); 290 signal(SIGINT, SIG_IGN); 291 break; 292 case 'G': 293 mimic_gnu = 0; 294 break; 295 case 'g': 296 mimic_gnu = 1; 297 break; 298 case 'L': 299 nesting_limit = atoi(optarg); 300 break; 301 case 'o': 302 trace_file(optarg); 303 break; 304 case 'P': 305 prefix_builtins = 1; 306 break; 307 case 'Q': 308 quiet++; 309 break; 310 case 'R': 311 reload = optarg; 312 break; 313 case 's': 314 synch_lines = 1; 315 break; 316 case 't': 317 mark_traced(optarg, 1); 318 break; 319 case 'U': /* undefine... */ 320 macro_popdef(optarg); 321 break; 322 case 'v': 323 fprintf(stderr, "%s version %d\n", getprogname(), 324 VERSION); 325 return EXIT_SUCCESS; 326 case OPT_HELP: 327 help(); 328 return EXIT_SUCCESS; 329 case '?': 330 default: 331 usage(stderr); 332 return EXIT_FAILURE; 333 } 334 335 #ifdef REDIRECT 336 /* 337 * This is meant only for debugging; it makes all output 338 * go to a known file, even if the command line options 339 * send it elsewhere. It should not be turned of in production code. 340 */ 341 if (freopen("/tmp/m4", "w+", stderr) == NULL) 342 err(EXIT_FAILURE, "Can't redirect errors to `%s'", 343 "/tmp/m4"); 344 #endif 345 argc -= optind; 346 argv += optind; 347 348 349 initkwds(); 350 if (mimic_gnu) 351 setup_builtin("format", FORMATTYPE); 352 353 active = stdout; /* default active output */ 354 bbase[0] = bufbase; 355 356 if (reload) { 357 #ifdef REAL_FREEZE 358 thaw_state(reload); 359 #else 360 if (fopen_trypath(infile, reload) == NULL) 361 err(1, "Can't open `%s'", reload); 362 sp = -1; 363 fp = 0; 364 thawing = 1; 365 macro(); 366 thawing = 0; 367 release_input(infile); 368 #endif 369 } 370 371 if (!argc) { 372 sp = -1; /* stack pointer initialized */ 373 fp = 0; /* frame pointer initialized */ 374 set_input(infile+0, stdin, "stdin"); 375 /* default input (naturally) */ 376 macro(); 377 } else 378 for (; argc--; ++argv) { 379 p = *argv; 380 if (p[0] == '-' && p[1] == EOS) 381 set_input(infile, stdin, "stdin"); 382 else if (fopen_trypath(infile, p) == NULL) 383 err(1, "%s", p); 384 sp = -1; 385 fp = 0; 386 macro(); 387 release_input(infile); 388 } 389 390 if (wrapindex) { 391 int i; 392 393 ilevel = 0; /* in case m4wrap includes.. */ 394 bufbase = bp = buf; /* use the entire buffer */ 395 if (mimic_gnu) { 396 while (wrapindex != 0) { 397 for (i = 0; i < wrapindex; i++) 398 pbstr(m4wraps[i]); 399 wrapindex =0; 400 macro(); 401 } 402 } else { 403 for (i = 0; i < wrapindex; i++) { 404 pbstr(m4wraps[i]); 405 macro(); 406 } 407 } 408 } 409 410 if (active != stdout) 411 active = stdout; /* reset output just in case */ 412 for (n = 1; n < maxout; n++) /* default wrap-up: undivert */ 413 if (outfile[n] != NULL) 414 getdiv(n); 415 /* remove bitbucket if used */ 416 if (outfile[0] != NULL) { 417 (void) fclose(outfile[0]); 418 } 419 420 #ifdef REAL_FREEZE 421 if (freeze) 422 freeze_state(freeze); 423 #else 424 if (freezef) 425 fclose(freezef); 426 #endif 427 428 return 0; 429 } 430 431 /* 432 * Look ahead for `token'. 433 * (on input `t == token[0]') 434 * Used for comment and quoting delimiters. 435 * Returns 1 if `token' present; copied to output. 436 * 0 if `token' not found; all characters pushed back 437 */ 438 static int 439 do_look_ahead(int t, const char *token) 440 { 441 int i; 442 443 assert((unsigned char)t == (unsigned char)token[0]); 444 445 for (i = 1; *++token; i++) { 446 t = gpbc(); 447 if (t == EOF || (unsigned char)t != (unsigned char)*token) { 448 pushback(t); 449 while (--i) 450 pushback(*--token); 451 return 0; 452 } 453 } 454 return 1; 455 } 456 457 #define LOOK_AHEAD(t, token) (t != EOF && \ 458 (unsigned char)(t)==(unsigned char)(token)[0] && \ 459 do_look_ahead(t,token)) 460 461 /* 462 * macro - the work horse.. 463 */ 464 static void 465 macro(void) 466 { 467 char token[MAXTOK+1]; 468 int t, l; 469 ndptr p; 470 int nlpar; 471 472 cycle { 473 t = gpbc(); 474 475 if (LOOK_AHEAD(t,lquote)) { /* strip quotes */ 476 nlpar = 0; 477 record(quotes, nlpar++); 478 /* 479 * Opening quote: scan forward until matching 480 * closing quote has been found. 481 */ 482 do { 483 484 l = gpbc(); 485 if (LOOK_AHEAD(l,rquote)) { 486 if (--nlpar > 0) 487 outputstr(rquote); 488 } else if (LOOK_AHEAD(l,lquote)) { 489 record(quotes, nlpar++); 490 outputstr(lquote); 491 } else if (l == EOF) { 492 if (!quiet) { 493 if (nlpar == 1) 494 warnx("unclosed quote:"); 495 else 496 warnx( 497 "%d unclosed quotes:", 498 nlpar); 499 dump_stack(quotes, nlpar); 500 } 501 exit(EXIT_FAILURE); 502 } else { 503 if (nlpar > 0) { 504 if (sp < 0) 505 reallyputchar(l); 506 else 507 CHRSAVE(l); 508 } 509 } 510 } 511 while (nlpar != 0); 512 } else if (sp < 0 && LOOK_AHEAD(t, scommt)) { 513 reallyoutputstr(scommt); 514 515 for(;;) { 516 t = gpbc(); 517 if (LOOK_AHEAD(t, ecommt)) { 518 reallyoutputstr(ecommt); 519 break; 520 } 521 if (t == EOF) 522 break; 523 reallyputchar(t); 524 } 525 } else if (t == '_' || isalpha(t)) { 526 p = inspect(t, token); 527 if (p != NULL) 528 pushback(l = gpbc()); 529 if (p == NULL || (l != LPAREN && 530 (macro_getdef(p)->type & NEEDARGS) != 0)) 531 outputstr(token); 532 else { 533 /* 534 * real thing.. First build a call frame: 535 */ 536 pushf(fp); /* previous call frm */ 537 pushf(macro_getdef(p)->type); /* type of the call */ 538 pushf(is_traced(p)); 539 pushf(0); /* parenthesis level */ 540 fp = sp; /* new frame pointer */ 541 /* 542 * now push the string arguments: 543 * XXX: Copy the macro definition. This leaks, but too 544 * lazy to fix properly. 545 * The problem is that if we evaluate a pushdef'ed 546 * macro and then popdef it while it the definition 547 * is still on the stack we are going to reference 548 * free memory. 549 */ 550 pushs1(xstrdup(macro_getdef(p)->defn)); /* defn string */ 551 pushs1((char *)macro_name(p)); /* macro name */ 552 pushs(ep); /* start next..*/ 553 554 if (l != LPAREN && PARLEV == 0) { 555 /* no bracks */ 556 chrsave(EOS); 557 558 if ((size_t)sp == STACKMAX) 559 errx(1, "internal stack overflow"); 560 eval((const char **) mstack+fp+1, 2, 561 CALTYP, TRACESTATUS); 562 563 ep = PREVEP; /* flush strspace */ 564 sp = PREVSP; /* previous sp.. */ 565 fp = PREVFP; /* rewind stack...*/ 566 } 567 } 568 } else if (t == EOF) { 569 if (sp > -1 && ilevel <= 0) { 570 if (!quiet) { 571 warnx("unexpected end of input, " 572 "unclosed parenthesis:"); 573 dump_stack(paren, PARLEV); 574 } 575 exit(EXIT_FAILURE); 576 } 577 if (ilevel <= 0) 578 break; /* all done thanks.. */ 579 release_input(infile+ilevel--); 580 emit_synchline(); 581 bufbase = bbase[ilevel]; 582 continue; 583 } else if (sp < 0) { /* not in a macro at all */ 584 reallyputchar(t); /* output directly.. */ 585 } 586 587 else switch(t) { 588 589 case LPAREN: 590 if (PARLEV > 0) 591 chrsave(t); 592 while (isspace(l = gpbc())) /* skip blank, tab, nl.. */ 593 if (PARLEV > 0) 594 chrsave(l); 595 pushback(l); 596 record(paren, PARLEV++); 597 break; 598 599 case RPAREN: 600 if (--PARLEV > 0) 601 chrsave(t); 602 else { /* end of argument list */ 603 chrsave(EOS); 604 605 if ((size_t)sp == STACKMAX) 606 errx(1, "internal stack overflow"); 607 608 eval((const char **) mstack+fp+1, sp-fp, 609 CALTYP, TRACESTATUS); 610 611 ep = PREVEP; /* flush strspace */ 612 sp = PREVSP; /* previous sp.. */ 613 fp = PREVFP; /* rewind stack...*/ 614 } 615 break; 616 617 case COMMA: 618 if (PARLEV == 1) { 619 chrsave(EOS); /* new argument */ 620 while (isspace(l = gpbc())) 621 ; 622 pushback(l); 623 pushs(ep); 624 } else 625 chrsave(t); 626 break; 627 628 default: 629 if (LOOK_AHEAD(t, scommt)) { 630 char *q; 631 for (q = scommt; *q; q++) 632 chrsave(*q); 633 for(;;) { 634 t = gpbc(); 635 if (LOOK_AHEAD(t, ecommt)) { 636 for (q = ecommt; *q; q++) 637 chrsave(*q); 638 break; 639 } 640 if (t == EOF) 641 break; 642 CHRSAVE(t); 643 } 644 } else 645 CHRSAVE(t); /* stack the char */ 646 break; 647 } 648 } 649 } 650 651 /* 652 * output string directly, without pushing it for reparses. 653 */ 654 void 655 outputstr(const char *s) 656 { 657 if (sp < 0) 658 reallyoutputstr(s); 659 else 660 while (*s) 661 CHRSAVE(*s++); 662 } 663 664 void 665 reallyoutputstr(const char *s) 666 { 667 if (synch_lines) { 668 while (*s) { 669 fputc(*s, active); 670 if (*s++ == '\n') { 671 infile[ilevel].synch_lineno++; 672 if (infile[ilevel].synch_lineno != 673 infile[ilevel].lineno) 674 do_emit_synchline(); 675 } 676 } 677 } else 678 fputs(s, active); 679 } 680 681 void 682 reallyputchar(int c) 683 { 684 putc(c, active); 685 if (synch_lines && c == '\n') { 686 infile[ilevel].synch_lineno++; 687 if (infile[ilevel].synch_lineno != infile[ilevel].lineno) 688 do_emit_synchline(); 689 } 690 } 691 692 /* 693 * build an input token.. 694 * consider only those starting with _ or A-Za-z. 695 */ 696 static ndptr 697 inspect(int c, char *tp) 698 { 699 char *name = tp; 700 char *etp = tp+MAXTOK; 701 ndptr p; 702 703 *tp++ = c; 704 705 while ((isalnum(c = gpbc()) || c == '_') && tp < etp) 706 *tp++ = c; 707 if (c != EOF) 708 PUSHBACK(c); 709 *tp = EOS; 710 /* token is too long, it won't match anything, but it can still 711 * be output. */ 712 if (tp == ep) { 713 outputstr(name); 714 while (isalnum(c = gpbc()) || c == '_') { 715 if (sp < 0) 716 reallyputchar(c); 717 else 718 CHRSAVE(c); 719 } 720 *name = EOS; 721 return NULL; 722 } 723 724 p = ohash_find(¯os, ohash_qlookupi(¯os, name, (void *)&tp)); 725 if (p == NULL) 726 return NULL; 727 if (macro_getdef(p) == NULL) 728 return NULL; 729 return p; 730 } 731 732 /* 733 * initkwds - initialise m4 keywords as fast as possible. 734 * This very similar to install, but without certain overheads, 735 * such as calling lookup. Malloc is not used for storing the 736 * keyword strings, since we simply use the static pointers 737 * within keywrds block. 738 */ 739 static void 740 initkwds(void) 741 { 742 unsigned int type; 743 size_t i; 744 745 for (i = 0; i < MAXKEYS; i++) { 746 type = keywrds[i].ktyp; 747 if ((keywrds[i].ktyp & NOARGS) == 0) 748 type |= NEEDARGS; 749 setup_builtin(keywrds[i].knam, type); 750 } 751 } 752 753 static void 754 record(struct position *t, int lev) 755 { 756 if (lev < MAXRECORD) { 757 t[lev].name = CURRENT_NAME; 758 t[lev].line = CURRENT_LINE; 759 } 760 } 761 762 static void 763 dump_stack(struct position *t, int lev) 764 { 765 int i; 766 767 for (i = 0; i < lev; i++) { 768 if (i == MAXRECORD) { 769 fprintf(stderr, " ...\n"); 770 break; 771 } 772 fprintf(stderr, " %s at line %lu\n", 773 t[i].name, t[i].line); 774 } 775 } 776 777 778 static void 779 enlarge_stack(void) 780 { 781 STACKMAX += STACKMAX/2; 782 mstack = xrealloc(mstack, sizeof(stae) * STACKMAX, 783 "Evaluation stack overflow (%lu)", 784 (unsigned long)STACKMAX); 785 sstack = xrealloc(sstack, STACKMAX, 786 "Evaluation stack overflow (%lu)", 787 (unsigned long)STACKMAX); 788 } 789 790 static const struct { 791 const char *n; 792 const char *d; 793 } nd [] = { 794 { "-d, --debug[=flags]", "set debug flags" }, 795 { "-D, --define=name[=value]", "define macro" }, 796 { "-e, --error-output=file", "send error output to file" }, 797 { "-E, --fatal-warnings", "exit on warnings" }, 798 { "-F, --freeze-state=file", "save state to file" }, 799 { "-g, --gnu", "enable gnu extensions" }, 800 { " --help", "print this message and exit" }, 801 { "-I, --include=file", "include file" }, 802 { "-i, --interactive", "unbuffer output, ignore tty signals" }, 803 { "-L, --nesting-limit=num", "macro expansion nesting limit (unimpl)" }, 804 { "-P, --prefix-builtins", "prefix builtins with m4_" }, 805 { "-Q, --quiet", "don't print warnings" }, 806 { "-R, --reload-state=file", "restore state from file" }, 807 { "-Q, --silent", "don't print warnings" }, 808 { "-s, --synclines", "output line directives for cpp(1)" }, 809 { "-t, --trace=macro", "trace the named macro" }, 810 { "-G, --traditional", "disable gnu extensions" }, 811 { "-U, --undefine=name", "undefine the named macro" }, 812 { "-v, --version", "print the version number and exit" }, 813 }; 814 815 static void 816 help(void) 817 { 818 size_t i; 819 fprintf(stdout, "%s version %d\n\n", getprogname(), VERSION); 820 usage(stdout); 821 822 fprintf(stdout, "\nThe long options are:\n"); 823 for (i = 0; i < __arraycount(nd); i++) 824 fprintf(stdout, "\t%-25.25s\t%s\n", nd[i].n, nd[i].d); 825 } 826