]> git.saurik.com Git - apple/libc.git/blob - string/FreeBSD/wcslcpy.c
Libc-763.13.tar.gz
[apple/libc.git] / string / FreeBSD / wcslcpy.c
1 /*
2 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * from OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp
28 */
29
30 #include <sys/cdefs.h>
31 #if 0
32 #if defined(LIBC_SCCS) && !defined(lint)
33 __RCSID("$NetBSD: wcslcpy.c,v 1.1 2000/12/23 23:14:36 itojun Exp $");
34 #endif /* LIBC_SCCS and not lint */
35 #endif
36 __FBSDID("$FreeBSD: src/lib/libc/string/wcslcpy.c,v 1.7 2009/02/03 17:58:20 danger Exp $");
37
38 #include <sys/types.h>
39 #include <wchar.h>
40
41 /*
42 * Copy src to string dst of size siz. At most siz-1 characters
43 * will be copied. Always NUL terminates (unless siz == 0).
44 * Returns wcslen(src); if retval >= siz, truncation occurred.
45 */
46 size_t
47 wcslcpy(wchar_t *dst, const wchar_t *src, size_t siz)
48 {
49 wchar_t *d = dst;
50 const wchar_t *s = src;
51 size_t n = siz;
52
53 /* Copy as many bytes as will fit */
54 if (n != 0 && --n != 0) {
55 do {
56 if ((*d++ = *s++) == 0)
57 break;
58 } while (--n != 0);
59 }
60
61 /* Not enough room in dst, add NUL and traverse rest of src */
62 if (n == 0) {
63 if (siz != 0)
64 *d = '\0'; /* NUL-terminate dst */
65 while (*s++)
66 ;
67 }
68
69 return(s - src - 1); /* count does not include NUL */
70 }