NetBSD/usr.bin/m4/misc.c

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1995-09-28 08:37:28 +03:00
/* $NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls 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
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#if 0
static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 6/6/93";
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#else
static char rcsid[] = "$NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls Exp $";
#endif
#endif /* not lint */
#include <sys/types.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include "mdef.h"
#include "stdd.h"
#include "extern.h"
#include "pathnames.h"
/*
* find the index of second str in the first str.
*/
int
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
*/
void
putback(c)
char c;
{
if (bp < endpbb)
*bp++ = c;
else
oops("too many characters pushed back");
}
/*
* pbstr - push string back onto input
* putback is replicated to improve
* performance.
*/
void
pbstr(s)
register char *s;
{
register char *es;
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register char *zp;
es = s;
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zp = bp;
while (*es)
es++;
es--;
while (es >= s)
if (zp < endpbb)
*zp++ = *es--;
if ((bp = zp) == endpbb)
oops("too many characters pushed back");
}
/*
* pbnum - convert number to string, push back on input.
*/
void
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
*/
void
chrsave(c)
char c;
{
if (ep < endest)
*ep++ = c;
else
oops("string space overflow");
}
/*
* read in a diversion file, and dispose it.
*/
void
getdiv(n)
int n;
{
register int c;
register FILE *dfil;
if (active == outfile[n])
oops("%s: diversion still active.", "undivert");
(void) fclose(outfile[n]);
outfile[n] = NULL;
m4temp[UNIQUE] = n + '0';
if ((dfil = fopen(m4temp, "r")) == NULL)
oops("%s: cannot undivert.", m4temp);
else
while ((c = getc(dfil)) != EOF)
putc(c, active);
(void) fclose(dfil);
#ifdef vms
if (remove(m4temp))
#else
if (unlink(m4temp) == -1)
#endif
oops("%s: cannot unlink.", m4temp);
}
void
onintr(signo)
int signo;
{
oops("interrupted.");
}
/*
* killdiv - get rid of the diversion files
*/
void
killdiv()
{
register int n;
for (n = 0; n < MAXOUT; n++)
if (outfile[n] != NULL) {
(void) fclose(outfile[n]);
m4temp[UNIQUE] = n + '0';
#ifdef vms
(void) remove(m4temp);
#else
(void) unlink(m4temp);
#endif
}
}
char *
xalloc(n)
unsigned long n;
{
register char *p = malloc(n);
if (p == NULL)
oops("malloc: %s", strerror(errno));
return p;
}
char *
xstrdup(s)
const char *s;
{
register char *p = strdup(s);
if (p == NULL)
oops("strdup: %s", strerror(errno));
return p;
}
char *
basename(s)
register char *s;
{
register char *p;
extern char *strrchr();
if ((p = strrchr(s, '/')) == NULL)
return s;
return ++p;
}
void
usage()
{
fprintf(stderr, "usage: m4 [-Dname[=val]] [-Uname]\n");
exit(1);
}
#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
void
#if __STDC__
oops(const char *fmt, ...)
#else
oops(fmt, va_alist)
char *fmt;
va_dcl
#endif
{
va_list ap;
#if __STDC__
va_start(ap, fmt);
#else
va_start(ap);
#endif
(void)fprintf(stderr, "%s: ", progname);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
exit(1);
/* NOTREACHED */
}