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/* $NetBSD: fgetln.c,v 1.9 2008/04/29 06:53:03 martin Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#ifdef HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#if !HAVE_FGETLN
#include <stdlib.h>
#ifndef HAVE_NBTOOL_CONFIG_H
/* These headers are required, but included from nbtool_config.h */
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#endif
char *
fgetln(FILE *fp, size_t *len)
{
static char *buf = NULL;
static size_t bufsiz = 0;
char *ptr;
if (buf == NULL) {
bufsiz = BUFSIZ;
if ((buf = malloc(bufsiz)) == NULL)
return NULL;
}
if (fgets(buf, bufsiz, fp) == NULL)
return NULL;
*len = 0;
while ((ptr = strchr(&buf[*len], '\n')) == NULL) {
size_t nbufsiz = bufsiz + BUFSIZ;
char *nbuf = realloc(buf, nbufsiz);
if (nbuf == NULL) {
int oerrno = errno;
free(buf);
errno = oerrno;
buf = NULL;
return NULL;
} else
buf = nbuf;
if (fgets(&buf[bufsiz], BUFSIZ, fp) == NULL) {
buf[bufsiz] = '\0';
*len = strlen(buf);
return buf;
}
*len = bufsiz;
bufsiz = nbufsiz;
}
*len = (ptr - buf) + 1;
return buf;
}
#endif
#ifdef TEST
int
main(int argc, char *argv[])
{
char *p;
size_t len;
while ((p = fgetln(stdin, &len)) != NULL) {
(void)printf("%zu %s", len, p);
free(p);
}
return 0;
}
#endif
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