Add nsswitch support.
[dragonfly.git] / lib / libc / string / wcslcpy.c
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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 *
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27 * $OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp $
28 * $NetBSD: wcslcpy.c,v 1.1 2000/12/23 23:14:36 itojun Exp $
29 * $FreeBSD: src/lib/libc/string/wcslcpy.c,v 1.3.2.1 2001/07/11 23:48:38 obrien Exp $
bd4c62e8 30 * $DragonFly: src/lib/libc/string/wcslcpy.c,v 1.3 2005/09/18 16:32:34 asmodai Exp $
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31 */
32
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33#include <sys/types.h>
34#include <assert.h>
35#include <wchar.h>
36
37/*
38 * Copy src to string dst of size siz. At most siz-1 characters
39 * will be copied. Always NUL terminates (unless siz == 0).
40 * Returns wcslen(src); if retval >= siz, truncation occurred.
41 */
42size_t
bd4c62e8 43wcslcpy(wchar_t *dst, const wchar_t *src, size_t siz)
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44{
45 wchar_t *d = dst;
46 const wchar_t *s = src;
47 size_t n = siz;
48
49 /* Copy as many bytes as will fit */
50 if (n != 0 && --n != 0) {
51 do {
52 if ((*d++ = *s++) == 0)
53 break;
54 } while (--n != 0);
55 }
56
57 /* Not enough room in dst, add NUL and traverse rest of src */
58 if (n == 0) {
59 if (siz != 0)
60 *d = '\0'; /* NUL-terminate dst */
61 while (*s++)
62 ;
63 }
64
65 return(s - src - 1); /* count does not include NUL */
66}