1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*
FUNCTION
<<wcslcpy>>---copy a wide-character string to specified length
SYNOPSIS
#include <wchar.h>
size_t wcslcpy(wchar_t *<[dst]>, const wchar_t *<[src]>, size_t <[siz]>);
DESCRIPTION
<<wcslcpy>> copies wide characters from <[src]> to <[dst]>
such that up to <[siz]> - 1 characters are copied. A
terminating null is appended to the result, unless <[siz]>
is zero.
RETURNS
<<wcslcpy>> returns the number of wide characters in <[src]>,
not including the terminating null wide character. If the
return value is greater than or equal to <[siz]>, then
not all wide characters were copied from <[src]> and truncation
occurred.
PORTABILITY
No supporting OS subroutines are required.
*/
/* $OpenBSD: wcslcpy.c,v 1.8 2019/01/25 00:19:25 millert Exp $ */
/*
* Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define _GNU_SOURCE
#include <wchar.h>
/*
* Copy string src to buffer dst of size dsize. At most dsize-1
* chars will be copied. Always NUL terminates (unless dsize == 0).
* Returns wcslen(src); if retval >= dsize, truncation occurred.
*/
size_t
wcslcpy(wchar_t *dst, const wchar_t *src, size_t dsize)
{
const wchar_t *osrc = src;
size_t nleft = dsize;
/* Copy as many bytes as will fit. */
if (nleft != 0) {
while (--nleft != 0) {
if ((*dst++ = *src++) == L'\0')
break;
}
}
/* Not enough room in dst, add NUL and traverse rest of src. */
if (nleft == 0) {
if (dsize != 0)
*dst = L'\0'; /* NUL-terminate dst */
while (*src++)
;
}
return (src - osrc - 1); /* count does not include NUL */
}
|
