main.c revision 100014
11590Srgrimes/* $OpenBSD: main.c,v 1.53 2002/04/26 16:15:16 espie Exp $ */ 21590Srgrimes/* $NetBSD: main.c,v 1.12 1997/02/08 23:54:49 cgd Exp $ */ 31590Srgrimes 41590Srgrimes/*- 51590Srgrimes * Copyright (c) 1989, 1993 61590Srgrimes * The Regents of the University of California. All rights reserved. 71590Srgrimes * 81590Srgrimes * This code is derived from software contributed to Berkeley by 91590Srgrimes * Ozan Yigit at York University. 101590Srgrimes * 111590Srgrimes * Redistribution and use in source and binary forms, with or without 121590Srgrimes * modification, are permitted provided that the following conditions 131590Srgrimes * are met: 141590Srgrimes * 1. Redistributions of source code must retain the above copyright 151590Srgrimes * notice, this list of conditions and the following disclaimer. 161590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 171590Srgrimes * notice, this list of conditions and the following disclaimer in the 181590Srgrimes * documentation and/or other materials provided with the distribution. 191590Srgrimes * 3. All advertising materials mentioning features or use of this software 201590Srgrimes * must display the following acknowledgement: 211590Srgrimes * This product includes software developed by the University of 221590Srgrimes * California, Berkeley and its contributors. 231590Srgrimes * 4. Neither the name of the University nor the names of its contributors 241590Srgrimes * may be used to endorse or promote products derived from this software 251590Srgrimes * without specific prior written permission. 261590Srgrimes * 271590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 281590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 291590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 301590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 311590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 321590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 331590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3428503Scharnier * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 351590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 361590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 371590Srgrimes * SUCH DAMAGE. 381590Srgrimes */ 391590Srgrimes 4028503Scharnier#ifndef lint 4123690Speterstatic char copyright[] = 4228503Scharnier"@(#) Copyright (c) 1989, 1993\n\ 4328503Scharnier The Regents of the University of California. All rights reserved.\n"; 4450477Speter#endif /* not lint */ 451590Srgrimes 461590Srgrimes#ifndef lint 47280250Srwatson#if 0 48253457Spjdstatic char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; 4928503Scharnier#else 5028503Scharnier#if 0 51253457Spjdstatic char rcsid[] = "$OpenBSD: main.c,v 1.53 2002/04/26 16:15:16 espie Exp $"; 5252455Sache#endif 5334323Sache#endif 54253457Spjd#endif /* not lint */ 55200633Sjh 56204876Sache#include <sys/cdefs.h> 571590Srgrimes__FBSDID("$FreeBSD: head/usr.bin/m4/main.c 100014 2002-07-15 02:15:12Z jmallett $"); 581590Srgrimes 591590Srgrimes/* 60253457Spjd * main.c 6123690Speter * Facility: m4 macro processor 62131502Stjr * by: oz 63131502Stjr */ 641590Srgrimes 65227193Sed#include <sys/types.h> 66227193Sed#include <assert.h> 671590Srgrimes#include <signal.h> 68227193Sed#include <errno.h> 69227193Sed#include <unistd.h> 70227193Sed#include <stdio.h> 71227193Sed#include <ctype.h> 72227193Sed#include <string.h> 73227193Sed#include <stddef.h> 7492922Simp#include <stdlib.h> 751590Srgrimes#include <err.h> 76253457Spjd#include "mdef.h" 77253457Spjd#include "stdd.h" 78253457Spjd#include "extern.h" 79253457Spjd#include "pathnames.h" 80253457Spjd 81253457Spjdndptr hashtab[HASHSIZE]; /* hash table for macros etc. */ 82253457Spjdstae *mstack; /* stack of m4 machine */ 83253457Spjdchar *sstack; /* shadow stack, for string space extension */ 84253457Spjdstatic size_t STACKMAX; /* current maximum size of stack */ 85253457Spjdint sp; /* current m4 stack pointer */ 86253457Spjdint fp; /* m4 call frame pointer */ 871590Srgrimesstruct input_file infile[MAXINP];/* input file stack (0=stdin) */ 88102944Sdwmalonechar *inname[MAXINP]; /* names of these input files */ 891590Srgrimesint inlineno[MAXINP]; /* current number in each input file */ 90204876SacheFILE **outfile; /* diversion array(0=bitbucket)*/ 911590Srgrimesint maxout; 92204803SacheFILE *active; /* active output file pointer */ 93204876Sacheint ilevel = 0; /* input file stack pointer */ 94204803Sacheint oindex = 0; /* diversion index.. */ 95131502Stjrconst char *null = ""; /* as it says.. just a null.. */ 96253457Spjdconst char *m4wraps = ""; /* m4wrap string default.. */ 971590Srgrimeschar lquote[MAXCCHARS+1] = {LQUOTE}; /* left quote character (`) */ 9895030Sachechar rquote[MAXCCHARS+1] = {RQUOTE}; /* right quote character (') */ 9934323Sachechar scommt[MAXCCHARS+1] = {SCOMMT}; /* start character for comment */ 1001590Srgrimeschar ecommt[MAXCCHARS+1] = {ECOMMT}; /* end character for comment */ 10197527Stjrint synccpp; /* Line synchronisation for C preprocessor */ 1021590Srgrimes 1031590Srgrimesstruct keyblk keywrds[] = { /* m4 keywords to be installed */ 1041590Srgrimes { "include", INCLTYPE }, 1051590Srgrimes { "sinclude", SINCTYPE }, 1061590Srgrimes { "define", DEFITYPE }, 1071590Srgrimes { "defn", DEFNTYPE }, 1081590Srgrimes { "divert", DIVRTYPE | NOARGS }, 10929207Sjoerg { "expr", EXPRTYPE }, 11029207Sjoerg { "eval", EXPRTYPE }, 11129207Sjoerg { "substr", SUBSTYPE }, 1121590Srgrimes { "ifelse", IFELTYPE }, 1131590Srgrimes { "ifdef", IFDFTYPE }, 1141590Srgrimes { "len", LENGTYPE }, 11528503Scharnier { "incr", INCRTYPE }, 1161590Srgrimes { "decr", DECRTYPE }, 1171590Srgrimes { "dnl", DNLNTYPE | NOARGS }, 1181590Srgrimes { "changequote", CHNQTYPE | NOARGS }, 1191590Srgrimes { "changecom", CHNCTYPE | NOARGS }, 12028503Scharnier { "index", INDXTYPE }, 1211590Srgrimes#ifdef EXTENDED 1221590Srgrimes { "paste", PASTTYPE }, 1231590Srgrimes { "spaste", SPASTYPE }, 1241590Srgrimes /* Newer extensions, needed to handle gnu-m4 scripts */ 1251590Srgrimes { "indir", INDIRTYPE}, 1261590Srgrimes { "builtin", BUILTINTYPE}, 1271590Srgrimes { "patsubst", PATSTYPE}, 128169636Sjmallett { "regexp", REGEXPTYPE}, 1291590Srgrimes { "esyscmd", ESYSCMDTYPE}, 13097527Stjr { "__file__", FILENAMETYPE | NOARGS}, 131169638Sjmallett { "__line__", LINETYPE | NOARGS}, 1321590Srgrimes#endif 1331590Srgrimes { "popdef", POPDTYPE }, 1341590Srgrimes { "pushdef", PUSDTYPE }, 1351590Srgrimes { "dumpdef", DUMPTYPE | NOARGS }, 1361590Srgrimes { "shift", SHIFTYPE | NOARGS }, 1371590Srgrimes { "translit", TRNLTYPE }, 1381590Srgrimes { "undefine", UNDFTYPE }, 1391590Srgrimes { "undivert", UNDVTYPE | NOARGS }, 14097529Stjr { "divnum", DIVNTYPE | NOARGS }, 14197529Stjr { "maketemp", MKTMTYPE }, 14297529Stjr { "errprint", ERRPTYPE | NOARGS }, 14397529Stjr { "m4wrap", M4WRTYPE | NOARGS }, 144131502Stjr { "m4exit", EXITTYPE | NOARGS }, 14597529Stjr { "syscmd", SYSCTYPE }, 14697529Stjr { "sysval", SYSVTYPE | NOARGS }, 147131502Stjr { "traceon", TRACEONTYPE | NOARGS }, 148255219Spjd { "traceoff", TRACEOFFTYPE | NOARGS }, 149255219Spjd 150253457Spjd#if defined(unix) || defined(__unix__) 151255219Spjd { "unix", SELFTYPE | NOARGS }, 15297529Stjr#else 1531590Srgrimes#ifdef vms 154253457Spjd { "vms", SELFTYPE | NOARGS }, 155255219Spjd#endif 156255219Spjd#endif 157253457Spjd}; 158253457Spjd 159253457Spjd#define MAXKEYS (sizeof(keywrds)/sizeof(struct keyblk)) 160255219Spjd 161253457Spjd#define MAXRECORD 50 1621590Srgrimesstatic struct position { 163253457Spjd char *name; 164253457Spjd unsigned long line; 165253457Spjd} quotes[MAXRECORD], paren[MAXRECORD]; 166253457Spjd 167253457Spjdstatic void record(struct position *, int); 168253457Spjdstatic void dump_stack(struct position *, int); 169253457Spjd 170253457Spjdstatic void macro(void); 171253457Spjdstatic void initkwds(void); 172253457Spjdstatic ndptr inspect(int, char *); 173253457Spjdstatic int do_look_ahead(int, const char *); 174253457Spjd 175253457Spjdstatic void enlarge_stack(void); 176204876Sache 177204876Sacheint 1781590Srgrimesmain(int argc, char *argv[]) 179204876Sache{ 180169639Sjmallett int c; 181169638Sjmallett int n; 1821590Srgrimes int rval; 183131502Stjr char *p; 184204876Sache 185204803Sache traceout = stderr; 18699433Stjr 18799433Stjr if (signal(SIGINT, SIG_IGN) != SIG_IGN) 1881590Srgrimes signal(SIGINT, onintr); 189204876Sache 190204876Sache initkwds(); 191204876Sache initspaces(); 192204876Sache STACKMAX = INITSTACKMAX; 193204876Sache 1941590Srgrimes mstack = (stae *)xalloc(sizeof(stae) * STACKMAX); 195204803Sache sstack = (char *)xalloc(STACKMAX); 196204876Sache 197204803Sache maxout = 0; 198204803Sache outfile = NULL; 19929207Sjoerg resizedivs(MAXOUT); 200204803Sache 20129207Sjoerg while ((c = getopt(argc, argv, "gst:d:D:U:o:I:")) != -1) 20229207Sjoerg switch(c) { 203204803Sache case 'D': /* define something..*/ 20499433Stjr for (p = optarg; *p; p++) 20599433Stjr if (*p == '=') 206204803Sache break; 207204876Sache if (*p) 2081590Srgrimes *p++ = EOS; 209204876Sache dodefine(optarg, p); 210204876Sache break; 211204876Sache case 'I': 212204803Sache addtoincludepath(optarg); 21399433Stjr break; 21499433Stjr case 'U': /* undefine... */ 215204803Sache remhash(optarg, TOP); 216204876Sache break; 217204876Sache case 'g': 2181590Srgrimes mimic_gnu = 1; 2191590Srgrimes break; 2201590Srgrimes case 'd': 2211590Srgrimes set_trace_flags(optarg); 222131502Stjr break; 223169638Sjmallett case 's': 22499433Stjr synccpp = 1; 22599433Stjr break; 2261590Srgrimes case 't': 2271590Srgrimes mark_traced(optarg, 1); 2281590Srgrimes break; 229227193Sed case 'o': 230204876Sache trace_file(optarg); 23198545Stjr break; 232204876Sache case '?': 233204876Sache default: 23498545Stjr usage(); 235204876Sache } 236204876Sache 237204927Sache argc -= optind; 238204927Sache argv += optind; 239204876Sache 240204876Sache rval = 0; 241204876Sache active = stdout; /* default active output */ 242204876Sache bbase[0] = bufbase; 243204876Sache if (!argc) { 244204876Sache sp = -1; /* stack pointer initialized */ 245204876Sache fp = 0; /* frame pointer initialized */ 246204876Sache set_input(infile+0, stdin, "stdin"); 247204876Sache /* default input (naturally) */ 248204876Sache if ((inname[0] = strdup("-")) == NULL) 249204876Sache err(1, NULL); 250204876Sache inlineno[0] = 1; 251204876Sache emitline(); 252204876Sache macro(); 253204876Sache } else 254204876Sache for (; argc--; ++argv) { 255204876Sache p = *argv; 256204876Sache if (p[0] == '-' && p[1] == EOS) 257204876Sache set_input(infile, stdin, "stdin"); 258176119Sghelmer else if (fopen_trypath(infile, p) == NULL) { 25998545Stjr warn("%s", p); 260204876Sache rval = 1; 26198545Stjr continue; 26298545Stjr } 263227193Sed sp = -1; 264204876Sache fp = 0; 265204803Sache if ((inname[0] = strdup(p)) == NULL) 266204876Sache err(1, NULL); 267204803Sache inlineno[0] = 1; 268204876Sache emitline(); 269204876Sache macro(); 270204876Sache release_input(infile); 271204876Sache } 272204876Sache 273204876Sache if (*m4wraps) { /* anything for rundown ?? */ 274204876Sache ilevel = 0; /* in case m4wrap includes.. */ 275204876Sache bufbase = bp = buf; /* use the entire buffer */ 276204876Sache pbstr(m4wraps); /* user-defined wrapup act */ 277204876Sache macro(); /* last will and testament */ 278204876Sache } 279204803Sache 280204803Sache if (active != stdout) 2811590Srgrimes active = stdout; /* reset output just in case */ 2821590Srgrimes for (n = 1; n < maxout; n++) /* default wrap-up: undivert */ 2831590Srgrimes if (outfile[n] != NULL) 2841590Srgrimes getdiv(n); 2851590Srgrimes /* remove bitbucket if used */ 286227193Sed if (outfile[0] != NULL) { 287204803Sache (void) fclose(outfile[0]); 2881590Srgrimes } 28923690Speter 290135214Stjr exit(rval); 291204876Sache} 29228503Scharnier 293204876Sache/* 2941590Srgrimes * Look ahead for `token'. 2951590Srgrimes * (on input `t == token[0]') 296227193Sed * Used for comment and quoting delimiters. 297131502Stjr * Returns 1 if `token' present; copied to output. 2981590Srgrimes * 0 if `token' not found; all characters pushed back 299102944Sdwmalone */ 3001590Srgrimesstatic int 301204803Sachedo_look_ahead(int t, const char *token) 302131502Stjr{ 30398547Stjr int i; 304204803Sache 30598547Stjr assert((unsigned char)t == (unsigned char)token[0]); 30698547Stjr 307204803Sache for (i = 1; *++token; i++) { 308204803Sache t = gpbc(); 3091590Srgrimes if (t == EOF || (unsigned char)t != (unsigned char)*token) { 3101590Srgrimes putback(t); 3111590Srgrimes while (--i) 312227193Sed putback(*--token); 313102944Sdwmalone return 0; 3141590Srgrimes } 3151590Srgrimes } 3161590Srgrimes return 1; 3171590Srgrimes} 31828503Scharnier 3191590Srgrimes#define LOOK_AHEAD(t, token) (t != EOF && \ 3201590Srgrimes (unsigned char)(t)==(unsigned char)(token)[0] && \ 3211590Srgrimes do_look_ahead(t,token)) 322227193Sed 323102944Sdwmalone/* 3241590Srgrimes * macro - the work horse.. 3251590Srgrimes */ 3261590Srgrimesstatic void 3271590Srgrimesmacro(void) 32828503Scharnier{ 3291590Srgrimes char token[MAXTOK+1]; 3301590Srgrimes int t, l; 3311590Srgrimes ndptr p; 3321590Srgrimes int nlpar; 3331590Srgrimes 3341590Srgrimes cycle { 33534323Sache t = gpbc(); 3361590Srgrimes if (t == '_' || isalpha(t)) { 3371590Srgrimes p = inspect(t, token); 3381590Srgrimes if (p != nil) 3391590Srgrimes putback(l = gpbc()); 3401590Srgrimes if (p == nil || (l != LPAREN && 3411590Srgrimes (p->type & NEEDARGS) != 0)) 3421590Srgrimes outputstr(token); 34399433Stjr else { 3441590Srgrimes /* 3451590Srgrimes * real thing.. First build a call frame: 3461590Srgrimes */ 3471590Srgrimes pushf(fp); /* previous call frm */ 3481590Srgrimes pushf(p->type); /* type of the call */ 3491590Srgrimes pushf(0); /* parenthesis level */ 3501590Srgrimes fp = sp; /* new frame pointer */ 35128503Scharnier /* 352102944Sdwmalone * now push the string arguments: 3531590Srgrimes */ 3541590Srgrimes pushs1(p->defn); /* defn string */ 35597905Stjr pushs1(p->name); /* macro name */ 3561590Srgrimes pushs(ep); /* start next..*/ 3571590Srgrimes 358 if (l != LPAREN && PARLEV == 0) { 359 /* no bracks */ 360 chrsave(EOS); 361 362 if ((uintptr_t)sp == STACKMAX) 363 errx(1, "internal stack overflow"); 364 eval((const char **) mstack+fp+1, 2, 365 CALTYP); 366 367 ep = PREVEP; /* flush strspace */ 368 sp = PREVSP; /* previous sp.. */ 369 fp = PREVFP; /* rewind stack...*/ 370 } 371 } 372 } else if (t == EOF) { 373 if (sp > -1) { 374 warnx( "unexpected end of input, unclosed parenthesis:"); 375 dump_stack(paren, PARLEV); 376 exit(1); 377 } 378 if (ilevel <= 0) 379 break; /* all done thanks.. */ 380 release_input(infile+ilevel--); 381 free(inname[ilevel+1]); 382 bufbase = bbase[ilevel]; 383 emitline(); 384 continue; 385 } 386 /* 387 * non-alpha token possibly seen.. 388 * [the order of else if .. stmts is important.] 389 */ 390 else if (LOOK_AHEAD(t,lquote)) { /* strip quotes */ 391 nlpar = 0; 392 record(quotes, nlpar++); 393 /* 394 * Opening quote: scan forward until matching 395 * closing quote has been found. 396 */ 397 do { 398 399 l = gpbc(); 400 if (LOOK_AHEAD(l,rquote)) { 401 if (--nlpar > 0) 402 outputstr(rquote); 403 } else if (LOOK_AHEAD(l,lquote)) { 404 record(quotes, nlpar++); 405 outputstr(lquote); 406 } else if (l == EOF) { 407 if (nlpar == 1) 408 warnx("unclosed quote:"); 409 else 410 warnx("%d unclosed quotes:", nlpar); 411 dump_stack(quotes, nlpar); 412 exit(1); 413 } else { 414 if (nlpar > 0) { 415 if (sp < 0) 416 putc(l, active); 417 else 418 CHRSAVE(l); 419 } 420 } 421 } 422 while (nlpar != 0); 423 } 424 425 else if (sp < 0 && LOOK_AHEAD(t, scommt)) { 426 fputs(scommt, active); 427 428 for(;;) { 429 t = gpbc(); 430 if (LOOK_AHEAD(t, ecommt)) { 431 fputs(ecommt, active); 432 break; 433 } 434 if (t == EOF) 435 break; 436 putc(t, active); 437 } 438 } 439 440 else if (sp < 0) { /* not in a macro at all */ 441 putc(t, active); /* output directly.. */ 442 } 443 444 else switch(t) { 445 446 case LPAREN: 447 if (PARLEV > 0) 448 chrsave(t); 449 while (isspace(l = gpbc())) 450 ; /* skip blank, tab, nl.. */ 451 putback(l); 452 record(paren, PARLEV++); 453 break; 454 455 case RPAREN: 456 if (--PARLEV > 0) 457 chrsave(t); 458 else { /* end of argument list */ 459 chrsave(EOS); 460 461 if ((uintptr_t)sp == STACKMAX) 462 errx(1, "internal stack overflow"); 463 464 eval((const char **) mstack+fp+1, sp-fp, 465 CALTYP); 466 467 ep = PREVEP; /* flush strspace */ 468 sp = PREVSP; /* previous sp.. */ 469 fp = PREVFP; /* rewind stack...*/ 470 } 471 break; 472 473 case COMMA: 474 if (PARLEV == 1) { 475 chrsave(EOS); /* new argument */ 476 while (isspace(l = gpbc())) 477 ; 478 putback(l); 479 pushs(ep); 480 } else 481 chrsave(t); 482 break; 483 484 default: 485 if (LOOK_AHEAD(t, scommt)) { 486 char *pc; 487 for (pc = scommt; *pc; pc++) 488 chrsave(*pc); 489 for(;;) { 490 t = gpbc(); 491 if (LOOK_AHEAD(t, ecommt)) { 492 for (pc = ecommt; *pc; pc++) 493 chrsave(*pc); 494 break; 495 } 496 if (t == EOF) 497 break; 498 CHRSAVE(t); 499 } 500 } else 501 CHRSAVE(t); /* stack the char */ 502 break; 503 } 504 } 505} 506 507/* 508 * output string directly, without pushing it for reparses. 509 */ 510void 511outputstr(const char *s) 512{ 513 if (sp < 0) 514 while (*s) 515 putc(*s++, active); 516 else 517 while (*s) 518 CHRSAVE(*s++); 519} 520 521/* 522 * build an input token.. 523 * consider only those starting with _ or A-Za-z. This is a 524 * combo with lookup to speed things up. 525 */ 526static ndptr 527inspect(int c, char *tp) 528{ 529 char *name = tp; 530 char *etp = tp+MAXTOK; 531 ndptr p; 532 unsigned int h; 533 534 h = *tp++ = c; 535 536 while ((isalnum(c = gpbc()) || c == '_') && tp < etp) 537 h = (h << 5) + h + (*tp++ = c); 538 if (c != EOF) 539 PUTBACK(c); 540 *tp = EOS; 541 /* token is too long, it won't match anything, but it can still 542 * be output. */ 543 if (tp == ep) { 544 outputstr(name); 545 while (isalnum(c = gpbc()) || c == '_') { 546 if (sp < 0) 547 putc(c, active); 548 else 549 CHRSAVE(c); 550 } 551 *name = EOS; 552 return nil; 553 } 554 555 for (p = hashtab[h % HASHSIZE]; p != nil; p = p->nxtptr) 556 if (h == p->hv && STREQ(name, p->name)) 557 break; 558 return p; 559} 560 561/* 562 * initkwds - initialise m4 keywords as fast as possible. 563 * This very similar to install, but without certain overheads, 564 * such as calling lookup. Malloc is not used for storing the 565 * keyword strings, since we simply use the static pointers 566 * within keywrds block. 567 */ 568static void 569initkwds(void) 570{ 571 size_t i; 572 unsigned int h; 573 ndptr p; 574 575 for (i = 0; i < MAXKEYS; i++) { 576 h = hash(keywrds[i].knam); 577 p = (ndptr) xalloc(sizeof(struct ndblock)); 578 p->nxtptr = hashtab[h % HASHSIZE]; 579 hashtab[h % HASHSIZE] = p; 580 p->name = xstrdup(keywrds[i].knam); 581 p->defn = xstrdup(null); 582 p->hv = h; 583 p->type = keywrds[i].ktyp & TYPEMASK; 584 if ((keywrds[i].ktyp & NOARGS) == 0) 585 p->type |= NEEDARGS; 586 } 587} 588 589/* Look up a builtin type, even if overridden by the user */ 590int 591builtin_type(const char *key) 592{ 593 int i; 594 595 for (i = 0; i != MAXKEYS; i++) 596 if (STREQ(keywrds[i].knam, key)) 597 return keywrds[i].ktyp; 598 return -1; 599} 600 601const char * 602builtin_realname(int n) 603{ 604 int i; 605 606 for (i = 0; i != MAXKEYS; i++) 607 if (((keywrds[i].ktyp ^ n) & TYPEMASK) == 0) 608 return keywrds[i].knam; 609 return NULL; 610} 611 612static void 613record(struct position *t, int lev) 614{ 615 if (lev < MAXRECORD) { 616 t[lev].name = CURRENT_NAME; 617 t[lev].line = CURRENT_LINE; 618 } 619} 620 621static void 622dump_stack(struct position *t, int lev) 623{ 624 int i; 625 626 for (i = 0; i < lev; i++) { 627 if (i == MAXRECORD) { 628 fprintf(stderr, " ...\n"); 629 break; 630 } 631 fprintf(stderr, " %s at line %lu\n", 632 t[i].name, t[i].line); 633 } 634} 635 636 637static void 638enlarge_stack(void) 639{ 640 STACKMAX *= 2; 641 mstack = realloc(mstack, sizeof(stae) * STACKMAX); 642 sstack = realloc(sstack, STACKMAX); 643 if (mstack == NULL || sstack == NULL) 644 errx(1, "Evaluation stack overflow (%lu)", 645 (unsigned long)STACKMAX); 646} 647 648/* Emit preprocessor #line directive if -s option used. */ 649void 650emitline(void) 651{ 652 653 if (synccpp) 654 fprintf(active, "#line %d \"%s\"\n", inlineno[ilevel], 655 inname[ilevel]); 656} 657