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Diffstat (limited to 'usr.bin/m4/main.c')
-rw-r--r--usr.bin/m4/main.c623
1 files changed, 0 insertions, 623 deletions
diff --git a/usr.bin/m4/main.c b/usr.bin/m4/main.c
deleted file mode 100644
index 9e29700fcb75b..0000000000000
--- a/usr.bin/m4/main.c
+++ /dev/null
@@ -1,623 +0,0 @@
-/* $OpenBSD: main.c,v 1.53 2002/04/26 16:15:16 espie Exp $ */
-/* $NetBSD: main.c,v 1.12 1997/02/08 23:54:49 cgd Exp $ */
-
-/*-
- * Copyright (c) 1989, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Ozan Yigit at York University.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-static char copyright[] =
-"@(#) Copyright (c) 1989, 1993\n\
- The Regents of the University of California. All rights reserved.\n";
-#endif /* not lint */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
-#else
-static char rcsid[] = "$OpenBSD: main.c,v 1.53 2002/04/26 16:15:16 espie Exp $";
-#endif
-#endif /* not lint */
-
-/*
- * main.c
- * Facility: m4 macro processor
- * by: oz
- */
-
-#include <sys/types.h>
-#include <assert.h>
-#include <signal.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <ctype.h>
-#include <string.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <err.h>
-#include "mdef.h"
-#include "stdd.h"
-#include "extern.h"
-#include "pathnames.h"
-
-ndptr hashtab[HASHSIZE]; /* hash table for macros etc. */
-stae *mstack; /* stack of m4 machine */
-char *sstack; /* shadow stack, for string space extension */
-static size_t STACKMAX; /* current maximum size of stack */
-int sp; /* current m4 stack pointer */
-int fp; /* m4 call frame pointer */
-struct input_file infile[MAXINP];/* input file stack (0=stdin) */
-FILE **outfile; /* diversion array(0=bitbucket)*/
-int maxout;
-FILE *active; /* active output file pointer */
-int ilevel = 0; /* input file stack pointer */
-int oindex = 0; /* diversion index.. */
-char *null = ""; /* as it says.. just a null.. */
-char *m4wraps = ""; /* m4wrap string default.. */
-char lquote[MAXCCHARS+1] = {LQUOTE}; /* left quote character (`) */
-char rquote[MAXCCHARS+1] = {RQUOTE}; /* right quote character (') */
-char scommt[MAXCCHARS+1] = {SCOMMT}; /* start character for comment */
-char ecommt[MAXCCHARS+1] = {ECOMMT}; /* end character for comment */
-
-struct keyblk keywrds[] = { /* m4 keywords to be installed */
- { "include", INCLTYPE },
- { "sinclude", SINCTYPE },
- { "define", DEFITYPE },
- { "defn", DEFNTYPE },
- { "divert", DIVRTYPE | NOARGS },
- { "expr", EXPRTYPE },
- { "eval", EXPRTYPE },
- { "substr", SUBSTYPE },
- { "ifelse", IFELTYPE },
- { "ifdef", IFDFTYPE },
- { "len", LENGTYPE },
- { "incr", INCRTYPE },
- { "decr", DECRTYPE },
- { "dnl", DNLNTYPE | NOARGS },
- { "changequote", CHNQTYPE | NOARGS },
- { "changecom", CHNCTYPE | NOARGS },
- { "index", INDXTYPE },
-#ifdef EXTENDED
- { "paste", PASTTYPE },
- { "spaste", SPASTYPE },
- /* Newer extensions, needed to handle gnu-m4 scripts */
- { "indir", INDIRTYPE},
- { "builtin", BUILTINTYPE},
- { "patsubst", PATSTYPE},
- { "regexp", REGEXPTYPE},
- { "esyscmd", ESYSCMDTYPE},
- { "__file__", FILENAMETYPE | NOARGS},
- { "__line__", LINETYPE | NOARGS},
-#endif
- { "popdef", POPDTYPE },
- { "pushdef", PUSDTYPE },
- { "dumpdef", DUMPTYPE | NOARGS },
- { "shift", SHIFTYPE | NOARGS },
- { "translit", TRNLTYPE },
- { "undefine", UNDFTYPE },
- { "undivert", UNDVTYPE | NOARGS },
- { "divnum", DIVNTYPE | NOARGS },
- { "maketemp", MKTMTYPE },
- { "errprint", ERRPTYPE | NOARGS },
- { "m4wrap", M4WRTYPE | NOARGS },
- { "m4exit", EXITTYPE | NOARGS },
- { "syscmd", SYSCTYPE },
- { "sysval", SYSVTYPE | NOARGS },
- { "traceon", TRACEONTYPE | NOARGS },
- { "traceoff", TRACEOFFTYPE | NOARGS },
-
-#if defined(unix) || defined(__unix__)
- { "unix", SELFTYPE | NOARGS },
-#else
-#ifdef vms
- { "vms", SELFTYPE | NOARGS },
-#endif
-#endif
-};
-
-#define MAXKEYS (sizeof(keywrds)/sizeof(struct keyblk))
-
-extern int optind;
-extern char *optarg;
-
-#define MAXRECORD 50
-static struct position {
- char *name;
- unsigned long line;
-} quotes[MAXRECORD], paren[MAXRECORD];
-
-static void record(struct position *, int);
-static void dump_stack(struct position *, int);
-
-static void macro(void);
-static void initkwds(void);
-static ndptr inspect(int, char *);
-static int do_look_ahead(int, const char *);
-
-static void enlarge_stack(void);
-
-int main(int, char *[]);
-
-int
-main(int argc, char *argv[])
-{
- int c;
- int n;
- char *p;
-
- if (signal(SIGINT, SIG_IGN) != SIG_IGN)
- signal(SIGINT, onintr);
-
- initkwds();
- initspaces();
- STACKMAX = INITSTACKMAX;
-
- mstack = (stae *)xalloc(sizeof(stae) * STACKMAX);
- sstack = (char *)xalloc(STACKMAX);
-
- maxout = 0;
- outfile = NULL;
- resizedivs(MAXOUT);
-
- while ((c = getopt(argc, argv, "gt:d:D:U:o:I:")) != -1)
- switch(c) {
-
- case 'D': /* define something..*/
- for (p = optarg; *p; p++)
- if (*p == '=')
- break;
- if (*p)
- *p++ = EOS;
- dodefine(optarg, p);
- break;
- case 'I':
- addtoincludepath(optarg);
- break;
- case 'U': /* undefine... */
- remhash(optarg, TOP);
- break;
- case 'g':
- mimic_gnu = 1;
- break;
- case 'd':
- set_trace_flags(optarg);
- break;
- case 't':
- mark_traced(optarg, 1);
- break;
- case 'o':
- trace_file(optarg);
- break;
- case '?':
- usage();
- }
-
- argc -= optind;
- argv += optind;
-
- active = stdout; /* default active output */
- bbase[0] = bufbase;
- if (!argc) {
- sp = -1; /* stack pointer initialized */
- fp = 0; /* frame pointer initialized */
- set_input(infile+0, stdin, "stdin");
- /* default input (naturally) */
- macro();
- } else
- for (; argc--; ++argv) {
- p = *argv;
- if (p[0] == '-' && p[1] == EOS)
- set_input(infile, stdin, "stdin");
- else if (fopen_trypath(infile, p) == NULL)
- err(1, "%s", p);
- sp = -1;
- fp = 0;
- macro();
- release_input(infile);
- }
-
- if (*m4wraps) { /* anything for rundown ?? */
- ilevel = 0; /* in case m4wrap includes.. */
- bufbase = bp = buf; /* use the entire buffer */
- pbstr(m4wraps); /* user-defined wrapup act */
- macro(); /* last will and testament */
- }
-
- if (active != stdout)
- active = stdout; /* reset output just in case */
- for (n = 1; n < maxout; n++) /* default wrap-up: undivert */
- if (outfile[n] != NULL)
- getdiv(n);
- /* remove bitbucket if used */
- if (outfile[0] != NULL) {
- (void) fclose(outfile[0]);
- }
-
- return 0;
-}
-
-/*
- * Look ahead for `token'.
- * (on input `t == token[0]')
- * Used for comment and quoting delimiters.
- * Returns 1 if `token' present; copied to output.
- * 0 if `token' not found; all characters pushed back
- */
-static int
-do_look_ahead(int t, const char *token)
-{
- int i;
-
- assert((unsigned char)t == (unsigned char)token[0]);
-
- for (i = 1; *++token; i++) {
- t = gpbc();
- if (t == EOF || (unsigned char)t != (unsigned char)*token) {
- putback(t);
- while (--i)
- putback(*--token);
- return 0;
- }
- }
- return 1;
-}
-
-#define LOOK_AHEAD(t, token) (t != EOF && \
- (unsigned char)(t)==(unsigned char)(token)[0] && \
- do_look_ahead(t,token))
-
-/*
- * macro - the work horse..
- */
-static void
-macro()
-{
- char token[MAXTOK+1];
- int t, l;
- ndptr p;
- int nlpar;
-
- cycle {
- t = gpbc();
- if (t == '_' || isalpha(t)) {
- p = inspect(t, token);
- if (p != nil)
- putback(l = gpbc());
- if (p == nil || (l != LPAREN &&
- (p->type & NEEDARGS) != 0))
- outputstr(token);
- else {
- /*
- * real thing.. First build a call frame:
- */
- pushf(fp); /* previous call frm */
- pushf(p->type); /* type of the call */
- pushf(0); /* parenthesis level */
- fp = sp; /* new frame pointer */
- /*
- * now push the string arguments:
- */
- pushs1(p->defn); /* defn string */
- pushs1(p->name); /* macro name */
- pushs(ep); /* start next..*/
-
- if (l != LPAREN && PARLEV == 0) {
- /* no bracks */
- chrsave(EOS);
-
- if (sp == STACKMAX)
- errx(1, "internal stack overflow");
- eval((const char **) mstack+fp+1, 2,
- CALTYP);
-
- ep = PREVEP; /* flush strspace */
- sp = PREVSP; /* previous sp.. */
- fp = PREVFP; /* rewind stack...*/
- }
- }
- } else if (t == EOF) {
- if (sp > -1) {
- warnx( "unexpected end of input, unclosed parenthesis:");
- dump_stack(paren, PARLEV);
- exit(1);
- }
- if (ilevel <= 0)
- break; /* all done thanks.. */
- release_input(infile+ilevel--);
- bufbase = bbase[ilevel];
- continue;
- }
- /*
- * non-alpha token possibly seen..
- * [the order of else if .. stmts is important.]
- */
- else if (LOOK_AHEAD(t,lquote)) { /* strip quotes */
- nlpar = 0;
- record(quotes, nlpar++);
- /*
- * Opening quote: scan forward until matching
- * closing quote has been found.
- */
- do {
-
- l = gpbc();
- if (LOOK_AHEAD(l,rquote)) {
- if (--nlpar > 0)
- outputstr(rquote);
- } else if (LOOK_AHEAD(l,lquote)) {
- record(quotes, nlpar++);
- outputstr(lquote);
- } else if (l == EOF) {
- if (nlpar == 1)
- warnx("unclosed quote:");
- else
- warnx("%d unclosed quotes:", nlpar);
- dump_stack(quotes, nlpar);
- exit(1);
- } else {
- if (nlpar > 0) {
- if (sp < 0)
- putc(l, active);
- else
- CHRSAVE(l);
- }
- }
- }
- while (nlpar != 0);
- }
-
- else if (sp < 0 && LOOK_AHEAD(t, scommt)) {
- fputs(scommt, active);
-
- for(;;) {
- t = gpbc();
- if (LOOK_AHEAD(t, ecommt)) {
- fputs(ecommt, active);
- break;
- }
- if (t == EOF)
- break;
- putc(t, active);
- }
- }
-
- else if (sp < 0) { /* not in a macro at all */
- putc(t, active); /* output directly.. */
- }
-
- else switch(t) {
-
- case LPAREN:
- if (PARLEV > 0)
- chrsave(t);
- while (isspace(l = gpbc()))
- ; /* skip blank, tab, nl.. */
- putback(l);
- record(paren, PARLEV++);
- break;
-
- case RPAREN:
- if (--PARLEV > 0)
- chrsave(t);
- else { /* end of argument list */
- chrsave(EOS);
-
- if (sp == STACKMAX)
- errx(1, "internal stack overflow");
-
- eval((const char **) mstack+fp+1, sp-fp,
- CALTYP);
-
- ep = PREVEP; /* flush strspace */
- sp = PREVSP; /* previous sp.. */
- fp = PREVFP; /* rewind stack...*/
- }
- break;
-
- case COMMA:
- if (PARLEV == 1) {
- chrsave(EOS); /* new argument */
- while (isspace(l = gpbc()))
- ;
- putback(l);
- pushs(ep);
- } else
- chrsave(t);
- break;
-
- default:
- if (LOOK_AHEAD(t, scommt)) {
- char *p;
- for (p = scommt; *p; p++)
- chrsave(*p);
- for(;;) {
- t = gpbc();
- if (LOOK_AHEAD(t, ecommt)) {
- for (p = ecommt; *p; p++)
- chrsave(*p);
- break;
- }
- if (t == EOF)
- break;
- CHRSAVE(t);
- }
- } else
- CHRSAVE(t); /* stack the char */
- break;
- }
- }
-}
-
-/*
- * output string directly, without pushing it for reparses.
- */
-void
-outputstr(const char *s)
-{
- if (sp < 0)
- while (*s)
- putc(*s++, active);
- else
- while (*s)
- CHRSAVE(*s++);
-}
-
-/*
- * build an input token..
- * consider only those starting with _ or A-Za-z. This is a
- * combo with lookup to speed things up.
- */
-static ndptr
-inspect(int c, char *tp)
-{
- char *name = tp;
- char *etp = tp+MAXTOK;
- ndptr p;
- unsigned int h;
-
- h = *tp++ = c;
-
- while ((isalnum(c = gpbc()) || c == '_') && tp < etp)
- h = (h << 5) + h + (*tp++ = c);
- if (c != EOF)
- PUTBACK(c);
- *tp = EOS;
- /* token is too long, it won't match anything, but it can still
- * be output. */
- if (tp == ep) {
- outputstr(name);
- while (isalnum(c = gpbc()) || c == '_') {
- if (sp < 0)
- putc(c, active);
- else
- CHRSAVE(c);
- }
- *name = EOS;
- return nil;
- }
-
- for (p = hashtab[h % HASHSIZE]; p != nil; p = p->nxtptr)
- if (h == p->hv && STREQ(name, p->name))
- break;
- return p;
-}
-
-/*
- * initkwds - initialise m4 keywords as fast as possible.
- * This very similar to install, but without certain overheads,
- * such as calling lookup. Malloc is not used for storing the
- * keyword strings, since we simply use the static pointers
- * within keywrds block.
- */
-static void
-initkwds()
-{
- size_t i;
- unsigned int h;
- ndptr p;
-
- for (i = 0; i < MAXKEYS; i++) {
- h = hash(keywrds[i].knam);
- p = (ndptr) xalloc(sizeof(struct ndblock));
- p->nxtptr = hashtab[h % HASHSIZE];
- hashtab[h % HASHSIZE] = p;
- p->name = xstrdup(keywrds[i].knam);
- p->defn = null;
- p->hv = h;
- p->type = keywrds[i].ktyp & TYPEMASK;
- if ((keywrds[i].ktyp & NOARGS) == 0)
- p->type |= NEEDARGS;
- }
-}
-
-/* Look up a builtin type, even if overridden by the user */
-int
-builtin_type(const char *key)
-{
- int i;
-
- for (i = 0; i != MAXKEYS; i++)
- if (STREQ(keywrds[i].knam, key))
- return keywrds[i].ktyp;
- return -1;
-}
-
-char *
-builtin_realname(int n)
-{
- int i;
-
- for (i = 0; i != MAXKEYS; i++)
- if (((keywrds[i].ktyp ^ n) & TYPEMASK) == 0)
- return keywrds[i].knam;
- return NULL;
-}
-
-static void
-record(struct position *t, int lev)
-{
- if (lev < MAXRECORD) {
- t[lev].name = CURRENT_NAME;
- t[lev].line = CURRENT_LINE;
- }
-}
-
-static void
-dump_stack(struct position *t, int lev)
-{
- int i;
-
- for (i = 0; i < lev; i++) {
- if (i == MAXRECORD) {
- fprintf(stderr, " ...\n");
- break;
- }
- fprintf(stderr, " %s at line %lu\n",
- t[i].name, t[i].line);
- }
-}
-
-
-static void
-enlarge_stack()
-{
- STACKMAX *= 2;
- mstack = realloc(mstack, sizeof(stae) * STACKMAX);
- sstack = realloc(sstack, STACKMAX);
- if (mstack == NULL || sstack == NULL)
- errx(1, "Evaluation stack overflow (%lu)",
- (unsigned long)STACKMAX);
-}
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