NetBSD/usr.bin/m4/misc.c

212 lines
5.1 KiB
C

/*
* 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);
}