Annotation of mandoc/compat_getline.c, Revision 1.2
1.2 ! schwarze 1: /* $Id: compat_getline.c,v 1.1 2015/11/07 20:52:52 schwarze Exp $ */
1.1 schwarze 2: /*
3: * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
1.2 ! schwarze 17: #include "config.h"
1.1 schwarze 18:
19: #include <sys/types.h>
20: #include <errno.h>
21: #include <stdio.h>
22: #include <stdlib.h>
23:
24: ssize_t
25: getline(char **buf, size_t *bufsz, FILE *fp)
26: {
27: char *nbuf;
28: size_t nbufsz, pos;
29: int c;
30:
31: if (buf == NULL || bufsz == NULL) {
32: errno = EINVAL;
33: return -1;
34: }
35:
36: if (*buf == NULL)
37: *bufsz = 0;
38: else
39: **buf = '\0';
40:
41: pos = 0;
42: for (;;) {
43: if (pos + 1 >= *bufsz) {
44: nbufsz = *bufsz ? *bufsz * 2 : BUFSIZ;
45: if ((nbuf = realloc(*buf, nbufsz)) == NULL)
46: return -1;
47: *buf = nbuf;
48: *bufsz = nbufsz;
49: }
50: if ((c = fgetc(fp)) == EOF) {
51: (*buf)[pos] = '\0';
52: return pos > 0 && feof(fp) ? (ssize_t)pos : -1;
53: }
54: (*buf)[pos++] = c;
55: (*buf)[pos] = '\0';
56: if (c == '\n')
57: return pos;
58: }
59: }
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