1/* flac - Command-line FLAC encoder/decoder
2 */
3
4#if HAVE_CONFIG_H
5#  include <config.h>
6#endif
7
8#include <string.h>
9
10#include "utils.h"
11#include "local_string_utils.h"
12
13/*	$OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $
14 *
15 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
16 *
17 * Permission to use, copy, modify, and distribute this software for any
18 * purpose with or without fee is hereby granted, provided that the above
19 * copyright notice and this permission notice appear in all copies.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
22 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
24 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
25 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
26 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
27 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
28 *
29 *
30 * Copy src to string dst of size siz.  At most siz-1 characters
31 * will be copied.  Always NUL terminates (unless siz == 0).
32 * Returns strlen(src); if retval >= siz, truncation occurred.
33 */
34size_t
35flac__strlcpy(char *dst, const char *src, size_t siz)
36{
37	register char *d = dst;
38	register const char *s = src;
39	register size_t n = siz;
40
41	/* Copy as many bytes as will fit */
42	if (n != 0 && --n != 0) {
43		do {
44			if ((*d++ = *s++) == 0)
45				break;
46		} while (--n != 0);
47	}
48
49	/* Not enough room in dst, add NUL and traverse rest of src */
50	if (n == 0) {
51		if (siz != 0)
52			*d = '\0';		/* NUL-terminate dst */
53		while (*s++)
54			;
55	}
56
57	return(s - src - 1);	/* count does not include NUL */
58}
59
60/*	$OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $
61 *
62 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
63 *
64 * Permission to use, copy, modify, and distribute this software for any
65 * purpose with or without fee is hereby granted, provided that the above
66 * copyright notice and this permission notice appear in all copies.
67 *
68 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
69 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
70 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
71 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
72 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
73 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
74 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
75 *
76 *
77 * Appends src to string dst of size siz (unlike strncat, siz is the
78 * full size of dst, not space left).  At most siz-1 characters
79 * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
80 * Returns strlen(src) + MIN(siz, strlen(initial dst)).
81 * If retval >= siz, truncation occurred.
82 */
83size_t
84flac__strlcat(char *dst, const char *src, size_t siz)
85{
86	register char *d = dst;
87	register const char *s = src;
88	register size_t n = siz;
89	size_t dlen;
90
91	/* Find the end of dst and adjust bytes left but don't go past end */
92	while (n-- != 0 && *d != '\0')
93		d++;
94	dlen = d - dst;
95	n = siz - dlen;
96
97	if (n == 0)
98		return(dlen + strlen(s));
99	while (*s != '\0') {
100		if (n != 1) {
101			*d++ = *s;
102			n--;
103		}
104		s++;
105	}
106	*d = '\0';
107
108	return(dlen + (s - src));	/* count does not include NUL */
109}
110