1 |
|
|
/* $OpenBSD: wcslcpy.c,v 1.7 2015/09/12 16:23:14 guenther Exp $ */ |
2 |
|
|
|
3 |
|
|
/* |
4 |
|
|
* Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com> |
5 |
|
|
* |
6 |
|
|
* Permission to use, copy, modify, and distribute this software for any |
7 |
|
|
* purpose with or without fee is hereby granted, provided that the above |
8 |
|
|
* copyright notice and this permission notice appear in all copies. |
9 |
|
|
* |
10 |
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
11 |
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
12 |
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
13 |
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
14 |
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
15 |
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
16 |
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
17 |
|
|
*/ |
18 |
|
|
|
19 |
|
|
#include <sys/types.h> |
20 |
|
|
#include <wchar.h> |
21 |
|
|
|
22 |
|
|
/* |
23 |
|
|
* Copy string src to buffer dst of size dsize. At most dsize-1 |
24 |
|
|
* chars will be copied. Always NUL terminates (unless dsize == 0). |
25 |
|
|
* Returns wcslen(src); if retval >= dsize, truncation occurred. |
26 |
|
|
*/ |
27 |
|
|
size_t |
28 |
|
|
wcslcpy(wchar_t *dst, const wchar_t *src, size_t dsize) |
29 |
|
|
{ |
30 |
|
|
const wchar_t *osrc = src; |
31 |
|
|
size_t nleft = dsize; |
32 |
|
|
|
33 |
|
|
/* Copy as many bytes as will fit. */ |
34 |
|
|
if (nleft != 0) { |
35 |
|
|
while (--nleft != 0) { |
36 |
|
|
if ((*dst++ = *src++) == L'\0') |
37 |
|
|
break; |
38 |
|
|
} |
39 |
|
|
} |
40 |
|
|
|
41 |
|
|
/* Not enough room in dst, add NUL and traverse rest of src. */ |
42 |
|
|
if (nleft == 0) { |
43 |
|
|
if (dsize != 0) |
44 |
|
|
*dst = L'\0'; /* NUL-terminate dst */ |
45 |
|
|
while (*src++) |
46 |
|
|
; |
47 |
|
|
} |
48 |
|
|
|
49 |
|
|
return(src - osrc - 1); /* count does not include NUL */ |
50 |
|
|
} |
51 |
|
|
DEF_WEAK(wcslcpy); |