427 lines
8.2 KiB
C
427 lines
8.2 KiB
C
/* $OpenBSD: misc.c,v 1.41 2009/10/14 17:19:47 sthen Exp $ */
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/* $NetBSD: misc.c,v 1.20 2009/11/06 15:13:27 joerg Exp $ */
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ozan Yigit at York University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: misc.c,v 1.20 2009/11/06 15:13:27 joerg Exp $");
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#include <sys/types.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <err.h>
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#include "mdef.h"
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#include "stdd.h"
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#include "extern.h"
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#include "pathnames.h"
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char *ep; /* first free char in strspace */
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static char *strspace; /* string space for evaluation */
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char *endest; /* end of string space */
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static size_t strsize = STRSPMAX;
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static size_t bufsize = BUFSIZE;
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unsigned char *buf; /* push-back buffer */
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unsigned char *bufbase; /* the base for current ilevel */
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unsigned char *bbase[MAXINP]; /* the base for each ilevel */
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unsigned char *bp; /* first available character */
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unsigned char *endpbb; /* end of push-back buffer */
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/*
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* find the index of second str in the first str.
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*/
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ptrdiff_t
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indx(const char *s1, const char *s2)
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{
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char *t;
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t = strstr(s1, s2);
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if (t == NULL)
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return (-1);
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else
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return (t - s1);
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}
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/*
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* pushback - push character back onto input
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*/
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void
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pushback(int c)
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{
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if (c == EOF)
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return;
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if (bp >= endpbb)
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enlarge_bufspace();
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*bp++ = c;
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}
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/*
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* pbstr - push string back onto input
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* pushback is replicated to improve
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* performance.
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*/
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void
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pbstr(const char *s)
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{
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size_t n;
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n = strlen(s);
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while ((size_t)(endpbb - bp) <= n)
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enlarge_bufspace();
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while (n > 0)
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*bp++ = s[--n];
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}
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/*
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* pbnum - convert number to string, push back on input.
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*/
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void
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pbnum(int n)
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{
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pbnumbase(n, 10, 0);
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}
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void
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pbnumbase(int n, int base, int d)
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{
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static char digits[36] = "0123456789abcdefghijklmnopqrstuvwxyz";
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int num;
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int printed = 0;
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if (base > 36)
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m4errx(1, "base %d > 36: not supported.", base);
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if (base < 2)
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m4errx(1, "bad base %d for conversion.", base);
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num = (n < 0) ? -n : n;
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do {
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pushback(digits[num % base]);
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printed++;
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}
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while ((num /= base) > 0);
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if (n < 0)
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printed++;
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while (printed++ < d)
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pushback('0');
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if (n < 0)
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pushback('-');
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}
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/*
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* pbunsigned - convert unsigned long to string, push back on input.
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*/
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void
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pbunsigned(unsigned long n)
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{
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do {
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pushback(n % 10 + '0');
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}
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while ((n /= 10) > 0);
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}
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void
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initspaces()
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{
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int i;
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strspace = xalloc(strsize+1, NULL);
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ep = strspace;
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endest = strspace+strsize;
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buf = (unsigned char *)xalloc(bufsize, NULL);
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bufbase = buf;
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bp = buf;
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endpbb = buf + bufsize;
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for (i = 0; i < MAXINP; i++)
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bbase[i] = buf;
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}
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void
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enlarge_strspace()
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{
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char *newstrspace;
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int i;
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strsize *= 2;
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newstrspace = malloc(strsize + 1);
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if (!newstrspace)
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errx(1, "string space overflow");
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memcpy(newstrspace, strspace, strsize/2);
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for (i = 0; i <= sp; i++)
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if (sstack[i])
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mstack[i].sstr = (mstack[i].sstr - strspace)
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+ newstrspace;
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ep = (ep-strspace) + newstrspace;
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free(strspace);
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strspace = newstrspace;
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endest = strspace + strsize;
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}
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void
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enlarge_bufspace()
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{
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unsigned char *newbuf;
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int i;
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bufsize += bufsize/2;
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newbuf = xrealloc(buf, bufsize, "too many characters pushed back");
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for (i = 0; i < MAXINP; i++)
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bbase[i] = (bbase[i]-buf)+newbuf;
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bp = (bp-buf)+newbuf;
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bufbase = (bufbase-buf)+newbuf;
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buf = newbuf;
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endpbb = buf+bufsize;
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}
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/*
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* chrsave - put single char on string space
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*/
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void
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chrsave(int c)
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{
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if (ep >= endest)
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enlarge_strspace();
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*ep++ = c;
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}
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/*
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* read in a diversion file, and dispose it.
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*/
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void
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getdiv(int n)
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{
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int c;
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if (active == outfile[n])
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m4errx(1, "undivert: diversion still active.");
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rewind(outfile[n]);
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while ((c = getc(outfile[n])) != EOF)
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putc(c, active);
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(void) fclose(outfile[n]);
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outfile[n] = NULL;
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}
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void
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onintr(int signo)
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{
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#define intrmessage "m4: interrupted.\n"
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write(STDERR_FILENO, intrmessage, sizeof(intrmessage)-1);
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_exit(1);
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}
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/*
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* killdiv - get rid of the diversion files
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*/
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void
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killdiv()
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{
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int n;
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for (n = 0; n < maxout; n++)
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if (outfile[n] != NULL) {
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(void) fclose(outfile[n]);
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}
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}
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void
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m4errx(int exval, const char *fmt, ...)
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{
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fprintf(stderr, "%s: ", getprogname());
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fprintf(stderr, "%s at line %lu: ", CURRENT_NAME, CURRENT_LINE);
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if (fmt != NULL) {
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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}
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fprintf(stderr, "\n");
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exit(exval);
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}
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/*
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* resizedivs: allocate more diversion files */
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void
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resizedivs(int n)
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{
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int i;
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outfile = (FILE **)xrealloc(outfile, sizeof(FILE *) * n,
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"too many diverts %d", n);
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for (i = maxout; i < n; i++)
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outfile[i] = NULL;
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maxout = n;
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}
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void *
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xalloc(size_t n, const char *fmt, ...)
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{
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void *p = malloc(n);
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if (p == NULL) {
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if (fmt == NULL)
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err(1, "malloc");
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else {
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va_list va;
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va_start(va, fmt);
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verr(1, fmt, va);
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va_end(va);
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}
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}
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return p;
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}
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void *
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xrealloc(void *old, size_t n, const char *fmt, ...)
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{
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char *p = realloc(old, n);
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if (p == NULL) {
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free(old);
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if (fmt == NULL)
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err(1, "realloc");
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else {
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va_list va;
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va_start(va, fmt);
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verr(1, fmt, va);
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va_end(va);
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}
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}
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return p;
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}
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char *
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xstrdup(const char *s)
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{
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char *p = strdup(s);
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if (p == NULL)
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err(1, "strdup");
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return p;
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}
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void
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usage(void)
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{
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fprintf(stderr, "usage: %s [-gPs] [-Dname[=value]] [-d flags] "
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"[-I dirname] [-o filename]\n"
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"\t[-t macro] [-Uname] [file ...]\n", getprogname());
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exit(1);
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}
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int
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obtain_char(struct input_file *f)
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{
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if (f->c == EOF)
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return EOF;
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f->c = fgetc(f->file);
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if (f->c == '\n')
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f->lineno++;
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return f->c;
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}
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void
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set_input(struct input_file *f, FILE *real, const char *name)
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{
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f->file = real;
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f->lineno = 1;
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f->c = 0;
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f->name = xstrdup(name);
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emit_synchline();
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}
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void
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do_emit_synchline()
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{
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fprintf(active, "#line %lu \"%s\"\n",
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infile[ilevel].lineno, infile[ilevel].name);
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infile[ilevel].synch_lineno = infile[ilevel].lineno;
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}
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void
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release_input(struct input_file *f)
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{
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if (f->file != stdin)
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fclose(f->file);
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f->c = EOF;
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/*
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* XXX can't free filename, as there might still be
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* error information pointing to it.
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*/
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}
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void
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doprintlineno(struct input_file *f)
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{
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pbunsigned(f->lineno);
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}
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void
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doprintfilename(struct input_file *f)
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{
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pbstr(rquote);
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pbstr(f->name);
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pbstr(lquote);
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}
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/*
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* buffer_mark/dump_buffer: allows one to save a mark in a buffer,
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* and later dump everything that was added since then to a file.
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*/
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size_t
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buffer_mark()
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{
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return bp - buf;
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}
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void
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dump_buffer(FILE *f, size_t m)
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{
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unsigned char *s;
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for (s = bp; (size_t)(s - buf) > m;)
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fputc(*--s, f);
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}
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