Add patch that contain Mali fixes.
[deb_xorg-server.git] / os / strlcat.c
CommitLineData
a09e091a
JB
1/*
2 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
9 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
10 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
11 * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#ifdef HAVE_DIX_CONFIG_H
18#include <dix-config.h>
19#endif
20
21#include <sys/types.h>
22#include <string.h>
23#include "os.h"
24
25/*
26 * Appends src to string dst of size siz (unlike strncat, siz is the
27 * full size of dst, not space left). At most siz-1 characters
28 * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
29 * Returns strlen(src) + MIN(siz, strlen(initial dst)).
30 * If retval >= siz, truncation occurred.
31 */
32size_t
33strlcat(char *dst, const char *src, size_t siz)
34{
35 register char *d = dst;
36 register const char *s = src;
37 register size_t n = siz;
38 size_t dlen;
39
40 /* Find the end of dst and adjust bytes left but don't go past end */
41 while (n-- != 0 && *d != '\0')
42 d++;
43 dlen = d - dst;
44 n = siz - dlen;
45
46 if (n == 0)
47 return (dlen + strlen(s));
48 while (*s != '\0') {
49 if (n != 1) {
50 *d++ = *s;
51 n--;
52 }
53 s++;
54 }
55 *d = '\0';
56
57 return (dlen + (s - src)); /* count does not include NUL */
58}