|
Packit |
6c4009 |
/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
|
|
Packit |
6c4009 |
This file is part of the GNU C Library.
|
|
Packit |
6c4009 |
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is free software; you can redistribute it and/or
|
|
Packit |
6c4009 |
modify it under the terms of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License as published by the Free Software Foundation; either
|
|
Packit |
6c4009 |
version 2.1 of the License, or (at your option) any later version.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
Packit |
6c4009 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
6c4009 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
6c4009 |
Lesser General Public License for more details.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
You should have received a copy of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License along with the GNU C Library; if not, see
|
|
Packit |
6c4009 |
<http://www.gnu.org/licenses/>. */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <wchar.h>
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#ifdef WCSNCPY
|
|
Packit |
6c4009 |
# define __wcsncpy WCSNCPY
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Copy no more than N wide-characters of SRC to DEST. */
|
|
Packit |
6c4009 |
wchar_t *
|
|
Packit |
6c4009 |
__wcsncpy (wchar_t *dest, const wchar_t *src, size_t n)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
wint_t c;
|
|
Packit |
6c4009 |
wchar_t *const s = dest;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
--dest;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (n >= 4)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
size_t n4 = n >> 2;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
for (;;)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
c = *src++;
|
|
Packit |
6c4009 |
*++dest = c;
|
|
Packit |
6c4009 |
if (c == L'\0')
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
c = *src++;
|
|
Packit |
6c4009 |
*++dest = c;
|
|
Packit |
6c4009 |
if (c == L'\0')
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
c = *src++;
|
|
Packit |
6c4009 |
*++dest = c;
|
|
Packit |
6c4009 |
if (c == L'\0')
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
c = *src++;
|
|
Packit |
6c4009 |
*++dest = c;
|
|
Packit |
6c4009 |
if (c == L'\0')
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
if (--n4 == 0)
|
|
Packit |
6c4009 |
goto last_chars;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
n = n - (dest - s) - 1;
|
|
Packit |
6c4009 |
if (n == 0)
|
|
Packit |
6c4009 |
return s;
|
|
Packit |
6c4009 |
goto zero_fill;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
last_chars:
|
|
Packit |
6c4009 |
n &= 3;
|
|
Packit |
6c4009 |
if (n == 0)
|
|
Packit |
6c4009 |
return s;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
do
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
c = *src++;
|
|
Packit |
6c4009 |
*++dest = c;
|
|
Packit |
6c4009 |
if (--n == 0)
|
|
Packit |
6c4009 |
return s;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
while (c != L'\0');
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
zero_fill:
|
|
Packit |
6c4009 |
do
|
|
Packit |
6c4009 |
*++dest = L'\0';
|
|
Packit |
6c4009 |
while (--n > 0);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
return s;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
#ifndef WCSNCPY
|
|
Packit |
6c4009 |
weak_alias (__wcsncpy, wcsncpy)
|
|
Packit |
6c4009 |
#endif
|