1/* $NetBSD: fgetln.c,v 1.5 2003/10/27 00:12:43 lukem Exp $ */
2
3/*
4 * Copyright 1999 Luke Mewburn <lukem@NetBSD.org>.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
24 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
26 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
27 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "nbtool_config.h"
31
32#if !HAVE_FGETLN
33#include <err.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37
38#define BUFCHUNKS BUFSIZ
39
40char *
41fgetln(FILE *fp, size_t *len)
42{
43 static char *buf;
44 static size_t bufsize;
45 size_t buflen;
46 char curbuf[BUFCHUNKS];
47 char *p;
48
49 if (buf == NULL) {
50 bufsize = BUFCHUNKS;
51 buf = (char *)malloc(bufsize);
52 if (buf == NULL)
53 err(1, "Unable to allocate buffer for fgetln()");
54 }
55
56 *buf = '\0';
57 buflen = 0;
58 while ((p = fgets(curbuf, sizeof(curbuf), fp)) != NULL) {
59 size_t l;
60
61 l = strlen(p);
62 if (bufsize < buflen + l) {
63 bufsize += BUFCHUNKS;
64 if ((buf = (char *)realloc(buf, bufsize)) == NULL)
65 err(1, "Unable to allocate %ld bytes of memory",
66 (long)bufsize);
67 }
68 strcpy(buf + buflen, p);
69 buflen += l;
70 if (p[l - 1] == '\n')
71 break;
72 }
73 if (p == NULL && *buf == '\0')
74 return (NULL);
75 *len = strlen(buf);
76 return (buf);
77}
78#endif
