112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/* $NetBSD: util.c,v 1.7 2006/07/27 15:29:07 christos Exp $ */
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/*
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* Copyright (c) 1994 Christos Zoulas
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* All rights reserved.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christos Zoulas.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* 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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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: util.c,v 1.7 2006/07/27 15:29:07 christos Exp $");
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#endif
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#include <err.h>
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#include <stdlib.h>
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#include <string.h>
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#include "util.h"
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/* emalloc():
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* Error checked malloc
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*/
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void *
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emalloc(s)
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size_t s;
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{
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void *ptr = malloc(s);
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if (ptr == NULL)
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err(1, NULL);
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return ptr;
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}
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/* erealloc():
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* Error checked realloc
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*/
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void *
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erealloc(p, s)
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void *p;
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size_t s;
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{
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void *ptr = realloc(p, s);
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if (ptr == NULL)
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err(1, NULL);
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return ptr;
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}
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/* getline():
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* Read a line from a file parsing continuations ending in \
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* and eliminating trailing newlines.
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*/
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char *
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getline(fp, size)
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FILE *fp;
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size_t *size;
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{
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size_t s, len = 0;
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char *buf = NULL;
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char *ptr;
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char line[10240];
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int cnt = 1;
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while (cnt) {
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if ((ptr = fgets(line, sizeof(line), fp)) == NULL) {
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*size = len;
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return buf;
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}
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s = strlen(line);
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if (ptr[s - 1] == '\n') /* the newline may be missing at EOF */
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s--; /* forget newline */
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if (!s)
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cnt = 0;
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else {
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if ((cnt = (ptr[s - 1] == '\\')) != 0) /* check for \\ */
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s--; /* forget \\ */
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}
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buf = erealloc(buf, len + s + 1);
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memcpy(buf + len, ptr, s);
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len += s;
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buf[len] = '\0';
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}
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*size = len;
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return buf;
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}
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