1#ifdef HAVE_CONFIG_H
2#include "config.h"
3#endif
4
5#ifdef HAVE_FGETLN
6
7int dummy;
8
9#else
10
11/*	$NetBSD: fgetln.c,v 1.3 2006/09/25 07:18:17 lukem Exp $	*/
12
13/*-
14 * Copyright (c) 1998 The NetBSD Foundation, Inc.
15 * All rights reserved.
16 *
17 * This code is derived from software contributed to The NetBSD Foundation
18 * by Christos Zoulas.
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 * 1. Redistributions of source code must retain the above copyright
24 *    notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 *    notice, this list of conditions and the following disclaimer in the
27 *    documentation and/or other materials provided with the distribution.
28 * 3. Neither the name of The NetBSD Foundation nor the names of its
29 *    contributors may be used to endorse or promote products derived
30 *    from this software without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
33 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
34 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
35 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
36 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
37 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
38 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
39 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
40 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGE.
43 */
44#include <errno.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48
49char *
50fgetln(fp, len)
51	FILE *fp;
52	size_t *len;
53{
54	static char *buf = NULL;
55	static size_t bufsiz = 0;
56	char *ptr;
57
58
59	if (buf == NULL) {
60		bufsiz = BUFSIZ;
61		if ((buf = malloc(bufsiz)) == NULL)
62			return NULL;
63	}
64
65	if (fgets(buf, bufsiz, fp) == NULL)
66		return NULL;
67
68	*len = 0;
69	while ((ptr = strchr(&buf[*len], '\n')) == NULL) {
70		size_t nbufsiz = bufsiz + BUFSIZ;
71		char *nbuf = realloc(buf, nbufsiz);
72
73		if (nbuf == NULL) {
74			int oerrno = errno;
75			free(buf);
76			errno = oerrno;
77			buf = NULL;
78			return NULL;
79		} else
80			buf = nbuf;
81
82		*len = bufsiz;
83		if (fgets(&buf[bufsiz], BUFSIZ, fp) == NULL)
84			return buf;
85
86		bufsiz = nbufsiz;
87	}
88
89	*len = (ptr - buf) + 1;
90	return buf;
91}
92
93#endif
94