blob: e19e44c6c660164c47d3b5de7a667f65a7b5f1f5 (
plain) (
blame)
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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/* Copyright (C) 1996-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <wchar.h>
#ifdef WCPNCPY
# define __wcpncpy WCPNCPY
#endif
/* Copy no more than N wide-characters of SRC to DEST, returning the
address of the last character written into DEST. */
wchar_t *
__wcpncpy (dest, src, n)
wchar_t *dest;
const wchar_t *src;
size_t n;
{
wint_t c;
wchar_t *const s = dest;
if (n >= 4)
{
size_t n4 = n >> 2;
for (;;)
{
c = *src++;
*dest++ = c;
if (c == L'\0')
break;
c = *src++;
*dest++ = c;
if (c == L'\0')
break;
c = *src++;
*dest++ = c;
if (c == L'\0')
break;
c = *src++;
*dest++ = c;
if (c == L'\0')
break;
if (--n4 == 0)
goto last_chars;
}
n -= dest - s;
goto zero_fill;
}
last_chars:
n &= 3;
if (n == 0)
return dest;
for (;;)
{
c = *src++;
--n;
*dest++ = c;
if (c == L'\0')
break;
if (n == 0)
return dest;
}
zero_fill:
while (n-- > 0)
dest[n] = L'\0';
return dest - 1;
}
#ifndef WCPNCPY
weak_alias (__wcpncpy, wcpncpy)
#endif
|
