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- /*
- * Copyright (c) 1989 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Ozan Yigit.
- *
- * 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 sccsid[] = "@(#)misc.c 5.6 (Berkeley) 2/26/91";
- #endif /* not lint */
-
- /*
- * misc.c
- * Facility: m4 macro processor
- * by: oz
- */
-
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "mdef.h"
- #include "extr.h"
- #include "pathnames.h"
-
- /*
- * indx - find the index of second str in the
- * first str.
- */
- indx(s1, s2)
- char *s1;
- char *s2;
- {
- register char *t;
- register char *p;
- register char *m;
-
- for (p = s1; *p; p++) {
- for (t = p, m = s2; *m && *m == *t; m++, t++)
- ;
- if (!*m)
- return(p - s1);
- }
- return (-1);
- }
-
- /*
- * putback - push character back onto input
- *
- */
- putback (c)
- char c;
- {
- if (bp < endpbb)
- *bp++ = c;
- else
- error("m4: too many characters pushed back");
- }
-
- /*
- * pbstr - push string back onto input
- * putback is replicated to improve
- * performance.
- *
- */
- pbstr(s)
- register char *s;
- {
- register char *es;
- register char *zp;
-
- es = s;
- zp = bp;
-
- while (*es)
- es++;
- es--;
- while (es >= s)
- if (zp < endpbb)
- *zp++ = *es--;
- if ((bp = zp) == endpbb)
- error("m4: too many characters pushed back");
- }
-
- /*
- * pbnum - convert number to string, push back on input.
- *
- */
- pbnum (n)
- int n;
- {
- register int num;
-
- num = (n < 0) ? -n : n;
- do {
- putback(num % 10 + '0');
- }
- while ((num /= 10) > 0);
-
- if (n < 0) putback('-');
- }
-
- /*
- * chrsave - put single char on string space
- *
- */
- chrsave (c)
- char c;
- {
- /*** if (sp < 0)
- putc(c, active);
- else ***/ if (ep < endest)
- *ep++ = c;
- else
- error("m4: string space overflow");
- }
-
- /*
- * getdiv - read in a diversion file, and
- * trash it.
- */
- getdiv(ind) {
- register int c;
- register FILE *dfil;
-
- if (active == outfile[ind])
- error("m4: undivert: diversion still active.");
- (void) fclose(outfile[ind]);
- outfile[ind] = NULL;
- m4temp[UNIQUE] = ind + '0';
- if ((dfil = fopen(m4temp, "r")) == NULL)
- error("m4: cannot undivert.");
- else
- while((c = getc(dfil)) != EOF)
- putc(c, active);
- (void) fclose(dfil);
-
- if (unlink(m4temp) == -1)
- error("m4: cannot unlink.");
- }
-
- /*
- * Very fatal error. Close all files
- * and die hard.
- */
- error(s)
- char *s;
- {
- killdiv();
- fprintf(stderr,"%s\n",s);
- exit(1);
- }
-
- /*
- * Interrupt handling
- */
- static char *msg = "\ninterrupted.";
-
- void
- onintr() {
- error(msg);
- }
-
- /*
- * killdiv - get rid of the diversion files
- *
- */
- killdiv() {
- register int n;
-
- for (n = 0; n < MAXOUT; n++)
- if (outfile[n] != NULL) {
- (void) fclose (outfile[n]);
- m4temp[UNIQUE] = n + '0';
- (void) unlink (m4temp);
- }
- }
-
- usage() {
- fprintf(stderr, "usage: m4 [-Dname[=val]] [-Uname]\n");
- exit(1);
- }
-