1250226Sjkim/* $OpenBSD: main.c,v 1.81 2012/04/12 17:00:11 espie Exp $ */ 295060Sjmallett/* $NetBSD: main.c,v 1.12 1997/02/08 23:54:49 cgd Exp $ */ 395060Sjmallett 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. 19228063Sbapt * 3. Neither the name of the University nor the names of its contributors 201590Srgrimes * may be used to endorse or promote products derived from this software 211590Srgrimes * without specific prior written permission. 221590Srgrimes * 231590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 241590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 251590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 261590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 271590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 281590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 291590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 301590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 311590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 321590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 331590Srgrimes * SUCH DAMAGE. 341590Srgrimes */ 351590Srgrimes 361590Srgrimes/* 371590Srgrimes * main.c 381590Srgrimes * Facility: m4 macro processor 391590Srgrimes * by: oz 401590Srgrimes */ 41228063Sbapt#include <sys/cdefs.h> 42228063Sbapt__FBSDID("$FreeBSD$"); 431590Srgrimes 4495060Sjmallett#include <assert.h> 451590Srgrimes#include <signal.h> 46228063Sbapt#include <err.h> 4795060Sjmallett#include <errno.h> 4895060Sjmallett#include <unistd.h> 491590Srgrimes#include <stdio.h> 5095060Sjmallett#include <ctype.h> 5195060Sjmallett#include <string.h> 5295060Sjmallett#include <stddef.h> 53228063Sbapt#include <stdint.h> 5480289Sobrien#include <stdlib.h> 55228063Sbapt#include <ohash.h> 561590Srgrimes#include "mdef.h" 571590Srgrimes#include "stdd.h" 581590Srgrimes#include "extern.h" 591590Srgrimes#include "pathnames.h" 601590Srgrimes 61228063Sbaptstae *mstack; /* stack of m4 machine */ 62228063Sbaptchar *sstack; /* shadow stack, for string space extension */ 6395060Sjmallettstatic size_t STACKMAX; /* current maximum size of stack */ 64228063Sbaptint sp; /* current m4 stack pointer */ 65228063Sbaptint fp; /* m4 call frame pointer */ 6695060Sjmallettstruct input_file infile[MAXINP];/* input file stack (0=stdin) */ 6795060SjmallettFILE **outfile; /* diversion array(0=bitbucket)*/ 6895060Sjmallettint maxout; 691590SrgrimesFILE *active; /* active output file pointer */ 70228063Sbaptint ilevel = 0; /* input file stack pointer */ 71228063Sbaptint oindex = 0; /* diversion index.. */ 72228063Sbaptconst char *null = ""; /* as it says.. just a null.. */ 73228063Sbaptchar **m4wraps = NULL; /* m4wraps array. */ 74228063Sbaptint maxwraps = 0; /* size of m4wraps array */ 75228063Sbaptint wrapindex = 0; /* current offset in m4wraps */ 7695060Sjmallettchar lquote[MAXCCHARS+1] = {LQUOTE}; /* left quote character (`) */ 7795060Sjmallettchar rquote[MAXCCHARS+1] = {RQUOTE}; /* right quote character (') */ 7895060Sjmallettchar scommt[MAXCCHARS+1] = {SCOMMT}; /* start character for comment */ 7995060Sjmallettchar ecommt[MAXCCHARS+1] = {ECOMMT}; /* end character for comment */ 80228063Sbaptint synch_lines = 0; /* line synchronisation for C preprocessor */ 81228063Sbaptint prefix_builtins = 0; /* -P option to prefix builtin keywords */ 821590Srgrimes 83228063Sbaptstruct keyblk { 84228063Sbapt const char *knam; /* keyword name */ 85228063Sbapt int ktyp; /* keyword type */ 86228063Sbapt}; 87228063Sbapt 88241777Sedstatic struct keyblk keywrds[] = { /* m4 keywords to be installed */ 8995060Sjmallett { "include", INCLTYPE }, 9095060Sjmallett { "sinclude", SINCTYPE }, 9195060Sjmallett { "define", DEFITYPE }, 9295060Sjmallett { "defn", DEFNTYPE }, 9395060Sjmallett { "divert", DIVRTYPE | NOARGS }, 9495060Sjmallett { "expr", EXPRTYPE }, 9595060Sjmallett { "eval", EXPRTYPE }, 9695060Sjmallett { "substr", SUBSTYPE }, 9795060Sjmallett { "ifelse", IFELTYPE }, 9895060Sjmallett { "ifdef", IFDFTYPE }, 9995060Sjmallett { "len", LENGTYPE }, 10095060Sjmallett { "incr", INCRTYPE }, 10195060Sjmallett { "decr", DECRTYPE }, 10295060Sjmallett { "dnl", DNLNTYPE | NOARGS }, 10395060Sjmallett { "changequote", CHNQTYPE | NOARGS }, 10495060Sjmallett { "changecom", CHNCTYPE | NOARGS }, 10595060Sjmallett { "index", INDXTYPE }, 1061590Srgrimes#ifdef EXTENDED 10795060Sjmallett { "paste", PASTTYPE }, 10895060Sjmallett { "spaste", SPASTYPE }, 109228063Sbapt /* Newer extensions, needed to handle gnu-m4 scripts */ 11095060Sjmallett { "indir", INDIRTYPE}, 11195060Sjmallett { "builtin", BUILTINTYPE}, 11295060Sjmallett { "patsubst", PATSTYPE}, 11395060Sjmallett { "regexp", REGEXPTYPE}, 11495060Sjmallett { "esyscmd", ESYSCMDTYPE}, 11595060Sjmallett { "__file__", FILENAMETYPE | NOARGS}, 11695060Sjmallett { "__line__", LINETYPE | NOARGS}, 1171590Srgrimes#endif 11895060Sjmallett { "popdef", POPDTYPE }, 11995060Sjmallett { "pushdef", PUSDTYPE }, 12095060Sjmallett { "dumpdef", DUMPTYPE | NOARGS }, 12195060Sjmallett { "shift", SHIFTYPE | NOARGS }, 12295060Sjmallett { "translit", TRNLTYPE }, 12395060Sjmallett { "undefine", UNDFTYPE }, 12495060Sjmallett { "undivert", UNDVTYPE | NOARGS }, 12595060Sjmallett { "divnum", DIVNTYPE | NOARGS }, 12695060Sjmallett { "maketemp", MKTMTYPE }, 127228063Sbapt { "mkstemp", MKTMTYPE }, 12895060Sjmallett { "errprint", ERRPTYPE | NOARGS }, 12995060Sjmallett { "m4wrap", M4WRTYPE | NOARGS }, 13095060Sjmallett { "m4exit", EXITTYPE | NOARGS }, 13195060Sjmallett { "syscmd", SYSCTYPE }, 13295060Sjmallett { "sysval", SYSVTYPE | NOARGS }, 13395060Sjmallett { "traceon", TRACEONTYPE | NOARGS }, 13495060Sjmallett { "traceoff", TRACEOFFTYPE | NOARGS }, 1351590Srgrimes 136100014Sjmallett#if defined(unix) || defined(__unix__) 13795060Sjmallett { "unix", SELFTYPE | NOARGS }, 1381590Srgrimes#else 1391590Srgrimes#ifdef vms 14095060Sjmallett { "vms", SELFTYPE | NOARGS }, 1411590Srgrimes#endif 1421590Srgrimes#endif 1431590Srgrimes}; 1441590Srgrimes 1451590Srgrimes#define MAXKEYS (sizeof(keywrds)/sizeof(struct keyblk)) 1461590Srgrimes 14795060Sjmallett#define MAXRECORD 50 14895060Sjmallettstatic struct position { 14995060Sjmallett char *name; 15095060Sjmallett unsigned long line; 15195060Sjmallett} quotes[MAXRECORD], paren[MAXRECORD]; 15295060Sjmallett 15395060Sjmallettstatic void record(struct position *, int); 15495060Sjmallettstatic void dump_stack(struct position *, int); 15595060Sjmallett 15695060Sjmallettstatic void macro(void); 15795060Sjmallettstatic void initkwds(void); 15895060Sjmallettstatic ndptr inspect(int, char *); 15995060Sjmallettstatic int do_look_ahead(int, const char *); 160228063Sbaptstatic void reallyoutputstr(const char *); 161228063Sbaptstatic void reallyputchar(int); 16295060Sjmallett 16395060Sjmallettstatic void enlarge_stack(void); 16495060Sjmallett 165228063Sbaptint main(int, char *[]); 166228063Sbapt 167234310Sbaptint exit_code = 0; 168234310Sbapt 1691590Srgrimesint 17095887Sjmallettmain(int argc, char *argv[]) 1711590Srgrimes{ 17295060Sjmallett int c; 17395060Sjmallett int n; 1741590Srgrimes char *p; 1751590Srgrimes 1761590Srgrimes if (signal(SIGINT, SIG_IGN) != SIG_IGN) 1771590Srgrimes signal(SIGINT, onintr); 1781590Srgrimes 179228063Sbapt init_macros(); 18095060Sjmallett initspaces(); 18195060Sjmallett STACKMAX = INITSTACKMAX; 1821590Srgrimes 183228063Sbapt mstack = (stae *)xalloc(sizeof(stae) * STACKMAX, NULL); 184228063Sbapt sstack = (char *)xalloc(STACKMAX, NULL); 18595060Sjmallett 18695060Sjmallett maxout = 0; 18795060Sjmallett outfile = NULL; 18895060Sjmallett resizedivs(MAXOUT); 18995060Sjmallett 190228063Sbapt while ((c = getopt(argc, argv, "gst:d:D:U:o:I:P")) != -1) 1911590Srgrimes switch(c) { 192228063Sbapt 1931590Srgrimes case 'D': /* define something..*/ 1941590Srgrimes for (p = optarg; *p; p++) 1951590Srgrimes if (*p == '=') 1961590Srgrimes break; 1971590Srgrimes if (*p) 1981590Srgrimes *p++ = EOS; 1991590Srgrimes dodefine(optarg, p); 2001590Srgrimes break; 20195060Sjmallett case 'I': 20295060Sjmallett addtoincludepath(optarg); 20395060Sjmallett break; 204228063Sbapt case 'P': 205228063Sbapt prefix_builtins = 1; 206228063Sbapt break; 2071590Srgrimes case 'U': /* undefine... */ 208228063Sbapt macro_popdef(optarg); 2091590Srgrimes break; 21095060Sjmallett case 'g': 21195060Sjmallett mimic_gnu = 1; 21295060Sjmallett break; 21395060Sjmallett case 'd': 21495060Sjmallett set_trace_flags(optarg); 21595060Sjmallett break; 21694957Sjmallett case 's': 217228063Sbapt synch_lines = 1; 21894957Sjmallett break; 21995060Sjmallett case 't': 22095060Sjmallett mark_traced(optarg, 1); 22195060Sjmallett break; 22295060Sjmallett case 'o': 22395060Sjmallett trace_file(optarg); 22495060Sjmallett break; 2251590Srgrimes case '?': 2261590Srgrimes usage(); 2271590Srgrimes } 2281590Srgrimes 2291590Srgrimes argc -= optind; 2301590Srgrimes argv += optind; 2311590Srgrimes 232228063Sbapt initkwds(); 233228063Sbapt if (mimic_gnu) 234228063Sbapt setup_builtin("format", FORMATTYPE); 235228063Sbapt 2361590Srgrimes active = stdout; /* default active output */ 2371590Srgrimes bbase[0] = bufbase; 2381590Srgrimes if (!argc) { 239228063Sbapt sp = -1; /* stack pointer initialized */ 240228063Sbapt fp = 0; /* frame pointer initialized */ 24195060Sjmallett set_input(infile+0, stdin, "stdin"); 24295060Sjmallett /* default input (naturally) */ 2431590Srgrimes macro(); 2441590Srgrimes } else 2451590Srgrimes for (; argc--; ++argv) { 2461590Srgrimes p = *argv; 24795060Sjmallett if (p[0] == '-' && p[1] == EOS) 24895060Sjmallett set_input(infile, stdin, "stdin"); 249228063Sbapt else if (fopen_trypath(infile, p) == NULL) 250228063Sbapt err(1, "%s", p); 2511590Srgrimes sp = -1; 252100014Sjmallett fp = 0; 2531590Srgrimes macro(); 254228063Sbapt release_input(infile); 2551590Srgrimes } 2561590Srgrimes 257228063Sbapt if (wrapindex) { 258228063Sbapt int i; 259228063Sbapt 2601590Srgrimes ilevel = 0; /* in case m4wrap includes.. */ 2611590Srgrimes bufbase = bp = buf; /* use the entire buffer */ 262228063Sbapt if (mimic_gnu) { 263228063Sbapt while (wrapindex != 0) { 264228063Sbapt for (i = 0; i < wrapindex; i++) 265228063Sbapt pbstr(m4wraps[i]); 266228063Sbapt wrapindex =0; 267228063Sbapt macro(); 268228063Sbapt } 269228063Sbapt } else { 270228063Sbapt for (i = 0; i < wrapindex; i++) { 271228063Sbapt pbstr(m4wraps[i]); 272228063Sbapt macro(); 273228063Sbapt } 274228063Sbapt } 2751590Srgrimes } 2761590Srgrimes 2771590Srgrimes if (active != stdout) 2781590Srgrimes active = stdout; /* reset output just in case */ 27995060Sjmallett for (n = 1; n < maxout; n++) /* default wrap-up: undivert */ 2801590Srgrimes if (outfile[n] != NULL) 2811590Srgrimes getdiv(n); 2821590Srgrimes /* remove bitbucket if used */ 28395060Sjmallett if (outfile[0] != NULL) { 28495060Sjmallett (void) fclose(outfile[0]); 28595060Sjmallett } 28695060Sjmallett 287234310Sbapt return exit_code; 2881590Srgrimes} 2891590Srgrimes 29095060Sjmallett/* 29195060Sjmallett * Look ahead for `token'. 29295060Sjmallett * (on input `t == token[0]') 29395060Sjmallett * Used for comment and quoting delimiters. 29495060Sjmallett * Returns 1 if `token' present; copied to output. 29595060Sjmallett * 0 if `token' not found; all characters pushed back 29695060Sjmallett */ 29795060Sjmallettstatic int 29895887Sjmallettdo_look_ahead(int t, const char *token) 29995060Sjmallett{ 30095060Sjmallett int i; 3011590Srgrimes 30295060Sjmallett assert((unsigned char)t == (unsigned char)token[0]); 30395060Sjmallett 30495060Sjmallett for (i = 1; *++token; i++) { 30595060Sjmallett t = gpbc(); 30695060Sjmallett if (t == EOF || (unsigned char)t != (unsigned char)*token) { 307228063Sbapt pushback(t); 30895060Sjmallett while (--i) 309228063Sbapt pushback(*--token); 31095060Sjmallett return 0; 31195060Sjmallett } 31295060Sjmallett } 31395060Sjmallett return 1; 31495060Sjmallett} 31595060Sjmallett 316228063Sbapt#define LOOK_AHEAD(t, token) (t != EOF && \ 317228063Sbapt (unsigned char)(t)==(unsigned char)(token)[0] && \ 31895060Sjmallett do_look_ahead(t,token)) 31995060Sjmallett 3201590Srgrimes/* 3211590Srgrimes * macro - the work horse.. 3221590Srgrimes */ 32395060Sjmallettstatic void 32499939Sjmallettmacro(void) 32595060Sjmallett{ 32695060Sjmallett char token[MAXTOK+1]; 32795060Sjmallett int t, l; 32895060Sjmallett ndptr p; 32995060Sjmallett int nlpar; 3301590Srgrimes 3311590Srgrimes cycle { 33295060Sjmallett t = gpbc(); 3331590Srgrimes 334228063Sbapt if (LOOK_AHEAD(t,lquote)) { /* strip quotes */ 33595060Sjmallett nlpar = 0; 33695060Sjmallett record(quotes, nlpar++); 33795060Sjmallett /* 33895060Sjmallett * Opening quote: scan forward until matching 33995060Sjmallett * closing quote has been found. 34095060Sjmallett */ 3411590Srgrimes do { 34295060Sjmallett 34395060Sjmallett l = gpbc(); 34495060Sjmallett if (LOOK_AHEAD(l,rquote)) { 34595060Sjmallett if (--nlpar > 0) 34695060Sjmallett outputstr(rquote); 34795060Sjmallett } else if (LOOK_AHEAD(l,lquote)) { 34895060Sjmallett record(quotes, nlpar++); 34995060Sjmallett outputstr(lquote); 35095060Sjmallett } else if (l == EOF) { 35195060Sjmallett if (nlpar == 1) 35295060Sjmallett warnx("unclosed quote:"); 3531590Srgrimes else 35495060Sjmallett warnx("%d unclosed quotes:", nlpar); 35595060Sjmallett dump_stack(quotes, nlpar); 35695060Sjmallett exit(1); 35795060Sjmallett } else { 35895060Sjmallett if (nlpar > 0) { 35995060Sjmallett if (sp < 0) 360228063Sbapt reallyputchar(l); 36195060Sjmallett else 36295060Sjmallett CHRSAVE(l); 36395060Sjmallett } 3641590Srgrimes } 3651590Srgrimes } 3661590Srgrimes while (nlpar != 0); 367228063Sbapt } else if (sp < 0 && LOOK_AHEAD(t, scommt)) { 368228063Sbapt reallyoutputstr(scommt); 3691590Srgrimes 37095060Sjmallett for(;;) { 37195060Sjmallett t = gpbc(); 37295060Sjmallett if (LOOK_AHEAD(t, ecommt)) { 373228063Sbapt reallyoutputstr(ecommt); 37495060Sjmallett break; 37595060Sjmallett } 37695060Sjmallett if (t == EOF) 37795060Sjmallett break; 378228063Sbapt reallyputchar(t); 3791590Srgrimes } 380228063Sbapt } else if (t == '_' || isalpha(t)) { 381228063Sbapt p = inspect(t, token); 382228063Sbapt if (p != NULL) 383228063Sbapt pushback(l = gpbc()); 384228063Sbapt if (p == NULL || (l != LPAREN && 385228063Sbapt (macro_getdef(p)->type & NEEDARGS) != 0)) 386228063Sbapt outputstr(token); 387228063Sbapt else { 388228063Sbapt /* 389228063Sbapt * real thing.. First build a call frame: 390228063Sbapt */ 391228063Sbapt pushf(fp); /* previous call frm */ 392228063Sbapt pushf(macro_getdef(p)->type); /* type of the call */ 393228063Sbapt pushf(is_traced(p)); 394228063Sbapt pushf(0); /* parenthesis level */ 395228063Sbapt fp = sp; /* new frame pointer */ 396228063Sbapt /* 397228063Sbapt * now push the string arguments: 398228063Sbapt */ 399228063Sbapt pushs1(macro_getdef(p)->defn); /* defn string */ 400228063Sbapt pushs1((char *)macro_name(p)); /* macro name */ 401228063Sbapt pushs(ep); /* start next..*/ 40295060Sjmallett 403228063Sbapt if (l != LPAREN && PARLEV == 0) { 404228063Sbapt /* no bracks */ 405228063Sbapt chrsave(EOS); 406228063Sbapt 407228063Sbapt if (sp == (int)STACKMAX) 408228063Sbapt errx(1, "internal stack overflow"); 409228063Sbapt eval((const char **) mstack+fp+1, 2, 410228063Sbapt CALTYP, TRACESTATUS); 411228063Sbapt 412228063Sbapt ep = PREVEP; /* flush strspace */ 413228063Sbapt sp = PREVSP; /* previous sp.. */ 414228063Sbapt fp = PREVFP; /* rewind stack...*/ 415228063Sbapt } 416228063Sbapt } 417228063Sbapt } else if (t == EOF) { 418228063Sbapt if (sp > -1 && ilevel <= 0) { 419228063Sbapt warnx( "unexpected end of input, unclosed parenthesis:"); 420228063Sbapt dump_stack(paren, PARLEV); 421228063Sbapt exit(1); 422228063Sbapt } 423228063Sbapt if (ilevel <= 0) 424228063Sbapt break; /* all done thanks.. */ 425228063Sbapt release_input(infile+ilevel--); 426228063Sbapt emit_synchline(); 427228063Sbapt bufbase = bbase[ilevel]; 428228063Sbapt continue; 429228063Sbapt } else if (sp < 0) { /* not in a macro at all */ 430228063Sbapt reallyputchar(t); /* output directly.. */ 4311590Srgrimes } 4321590Srgrimes 4331590Srgrimes else switch(t) { 4341590Srgrimes 4351590Srgrimes case LPAREN: 4361590Srgrimes if (PARLEV > 0) 4371590Srgrimes chrsave(t); 438228063Sbapt while (isspace(l = gpbc())) /* skip blank, tab, nl.. */ 439228063Sbapt if (PARLEV > 0) 440228063Sbapt chrsave(l); 441228063Sbapt pushback(l); 44295060Sjmallett record(paren, PARLEV++); 4431590Srgrimes break; 4441590Srgrimes 4451590Srgrimes case RPAREN: 4461590Srgrimes if (--PARLEV > 0) 4471590Srgrimes chrsave(t); 4481590Srgrimes else { /* end of argument list */ 4491590Srgrimes chrsave(EOS); 4501590Srgrimes 451228063Sbapt if (sp == (int)STACKMAX) 45227625Scharnier errx(1, "internal stack overflow"); 4531590Srgrimes 454100014Sjmallett eval((const char **) mstack+fp+1, sp-fp, 455228063Sbapt CALTYP, TRACESTATUS); 4561590Srgrimes 4571590Srgrimes ep = PREVEP; /* flush strspace */ 4581590Srgrimes sp = PREVSP; /* previous sp.. */ 4591590Srgrimes fp = PREVFP; /* rewind stack...*/ 4601590Srgrimes } 4611590Srgrimes break; 4621590Srgrimes 4631590Srgrimes case COMMA: 4641590Srgrimes if (PARLEV == 1) { 4651590Srgrimes chrsave(EOS); /* new argument */ 46695060Sjmallett while (isspace(l = gpbc())) 4671590Srgrimes ; 468228063Sbapt pushback(l); 4691590Srgrimes pushs(ep); 4701590Srgrimes } else 4711590Srgrimes chrsave(t); 4721590Srgrimes break; 4731590Srgrimes 4741590Srgrimes default: 47595060Sjmallett if (LOOK_AHEAD(t, scommt)) { 476228063Sbapt char *cp; 477228063Sbapt for (cp = scommt; *cp; cp++) 478228063Sbapt chrsave(*cp); 47995060Sjmallett for(;;) { 48095060Sjmallett t = gpbc(); 48195060Sjmallett if (LOOK_AHEAD(t, ecommt)) { 482228063Sbapt for (cp = ecommt; *cp; cp++) 483228063Sbapt chrsave(*cp); 48495060Sjmallett break; 48595060Sjmallett } 48695060Sjmallett if (t == EOF) 48795060Sjmallett break; 48895060Sjmallett CHRSAVE(t); 48995060Sjmallett } 49095060Sjmallett } else 49195060Sjmallett CHRSAVE(t); /* stack the char */ 4921590Srgrimes break; 4931590Srgrimes } 4941590Srgrimes } 4951590Srgrimes} 4961590Srgrimes 497100014Sjmallett/* 498100014Sjmallett * output string directly, without pushing it for reparses. 49995060Sjmallett */ 50095060Sjmallettvoid 50195887Sjmallettoutputstr(const char *s) 50295060Sjmallett{ 50395060Sjmallett if (sp < 0) 504228063Sbapt reallyoutputstr(s); 50595060Sjmallett else 50695060Sjmallett while (*s) 50795060Sjmallett CHRSAVE(*s++); 50895060Sjmallett} 50995060Sjmallett 510228063Sbaptvoid 511228063Sbaptreallyoutputstr(const char *s) 512228063Sbapt{ 513228063Sbapt if (synch_lines) { 514228063Sbapt while (*s) { 515228063Sbapt fputc(*s, active); 516228063Sbapt if (*s++ == '\n') { 517228063Sbapt infile[ilevel].synch_lineno++; 518228063Sbapt if (infile[ilevel].synch_lineno != 519228063Sbapt infile[ilevel].lineno) 520228063Sbapt do_emit_synchline(); 521228063Sbapt } 522228063Sbapt } 523228063Sbapt } else 524228063Sbapt fputs(s, active); 525228063Sbapt} 526228063Sbapt 527228063Sbaptvoid 528228063Sbaptreallyputchar(int c) 529228063Sbapt{ 530228063Sbapt putc(c, active); 531228063Sbapt if (synch_lines && c == '\n') { 532228063Sbapt infile[ilevel].synch_lineno++; 533228063Sbapt if (infile[ilevel].synch_lineno != infile[ilevel].lineno) 534228063Sbapt do_emit_synchline(); 535228063Sbapt } 536228063Sbapt} 537228063Sbapt 5381590Srgrimes/* 5391590Srgrimes * build an input token.. 540228063Sbapt * consider only those starting with _ or A-Za-z. 5411590Srgrimes */ 54295060Sjmallettstatic ndptr 543100014Sjmallettinspect(int c, char *tp) 5441590Srgrimes{ 54595060Sjmallett char *name = tp; 54695060Sjmallett char *etp = tp+MAXTOK; 54795060Sjmallett ndptr p; 548100014Sjmallett 549228063Sbapt *tp++ = c; 5501590Srgrimes 55195060Sjmallett while ((isalnum(c = gpbc()) || c == '_') && tp < etp) 552228063Sbapt *tp++ = c; 55395060Sjmallett if (c != EOF) 554228063Sbapt PUSHBACK(c); 5551590Srgrimes *tp = EOS; 55695060Sjmallett /* token is too long, it won't match anything, but it can still 55795060Sjmallett * be output. */ 55895060Sjmallett if (tp == ep) { 55995060Sjmallett outputstr(name); 56095060Sjmallett while (isalnum(c = gpbc()) || c == '_') { 56195060Sjmallett if (sp < 0) 562228063Sbapt reallyputchar(c); 56395060Sjmallett else 56495060Sjmallett CHRSAVE(c); 56595060Sjmallett } 56695060Sjmallett *name = EOS; 567228063Sbapt return NULL; 56895060Sjmallett } 5691590Srgrimes 570228063Sbapt p = ohash_find(¯os, ohash_qlookupi(¯os, name, (const char **)&tp)); 571228063Sbapt if (p == NULL) 572228063Sbapt return NULL; 573228063Sbapt if (macro_getdef(p) == NULL) 574228063Sbapt return NULL; 5751590Srgrimes return p; 5761590Srgrimes} 5771590Srgrimes 5781590Srgrimes/* 579100014Sjmallett * initkwds - initialise m4 keywords as fast as possible. 5801590Srgrimes * This very similar to install, but without certain overheads, 581100014Sjmallett * such as calling lookup. Malloc is not used for storing the 58295060Sjmallett * keyword strings, since we simply use the static pointers 5831590Srgrimes * within keywrds block. 5841590Srgrimes */ 58595060Sjmallettstatic void 58699939Sjmallettinitkwds(void) 58795060Sjmallett{ 588228063Sbapt unsigned int type; 589228063Sbapt int i; 5901590Srgrimes 591228063Sbapt for (i = 0; i < (int)MAXKEYS; i++) { 592228063Sbapt type = keywrds[i].ktyp & TYPEMASK; 59395060Sjmallett if ((keywrds[i].ktyp & NOARGS) == 0) 594228063Sbapt type |= NEEDARGS; 595228063Sbapt setup_builtin(keywrds[i].knam, type); 5961590Srgrimes } 5971590Srgrimes} 59894957Sjmallett 59995060Sjmallettstatic void 60095887Sjmallettrecord(struct position *t, int lev) 60195060Sjmallett{ 60295060Sjmallett if (lev < MAXRECORD) { 60395060Sjmallett t[lev].name = CURRENT_NAME; 60495060Sjmallett t[lev].line = CURRENT_LINE; 60595060Sjmallett } 60695060Sjmallett} 60795060Sjmallett 60895060Sjmallettstatic void 60995887Sjmallettdump_stack(struct position *t, int lev) 61095060Sjmallett{ 61195060Sjmallett int i; 61295060Sjmallett 61395060Sjmallett for (i = 0; i < lev; i++) { 61495060Sjmallett if (i == MAXRECORD) { 61595060Sjmallett fprintf(stderr, " ...\n"); 61695060Sjmallett break; 61795060Sjmallett } 618100014Sjmallett fprintf(stderr, " %s at line %lu\n", 61995060Sjmallett t[i].name, t[i].line); 62095060Sjmallett } 62195060Sjmallett} 62295060Sjmallett 62395060Sjmallett 624100014Sjmallettstatic void 62599939Sjmallettenlarge_stack(void) 62695060Sjmallett{ 627228063Sbapt STACKMAX += STACKMAX/2; 628228063Sbapt mstack = xrealloc(mstack, sizeof(stae) * STACKMAX, 629228063Sbapt "Evaluation stack overflow (%lu)", 630228063Sbapt (unsigned long)STACKMAX); 631228063Sbapt sstack = xrealloc(sstack, STACKMAX, 632228063Sbapt "Evaluation stack overflow (%lu)", 633228063Sbapt (unsigned long)STACKMAX); 63495060Sjmallett} 635