70 lines
2.6 KiB
C
70 lines
2.6 KiB
C
|
/****************************************************************************
|
||
|
|
* libs/libc/wchar/lib_wcsncpy.c
|
||
|
|
*
|
||
|
|
* Copyright © 2005-2014 Rich Felker, et al.
|
||
|
|
*
|
||
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
||
|
|
* a copy of this software and associated documentation files (the
|
||
|
|
* "Software"), to deal in the Software without restriction, including
|
||
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
||
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
||
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
||
|
|
* the following conditions:
|
||
|
|
*
|
||
|
|
* The above copyright notice and this permission notice shall be
|
||
|
|
* included in all copies or substantial portions of the Software.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
||
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
||
|
|
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
||
|
|
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
||
|
|
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Included Files
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#include <wchar.h>
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Public Functions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Name: wcsncpy
|
||
|
|
*
|
||
|
|
* Description:
|
||
|
|
* Copies the first num characters of source to destination. If the end
|
||
|
|
* of the source C wide string (which is signaled by a null wide
|
||
|
|
* character) is found before num characters have been copied, destination
|
||
|
|
* is padded with additional null wide characters until a total of num
|
||
|
|
* characters have been written to it.
|
||
|
|
*
|
||
|
|
* Input Parameters:
|
||
|
|
* d - the destination wchar string where the content is to be copied
|
||
|
|
* s - the wchar string to be copied
|
||
|
|
* n - maximum number of wide characters to be copied from source
|
||
|
|
*
|
||
|
|
* Returned Value:
|
||
|
|
* A pointer to the destination string
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
FAR wchar_t *wcsncpy(FAR wchar_t *d, FAR const wchar_t *s, size_t n)
|
||
|
|
{
|
||
|
|
FAR wchar_t *a = d;
|
||
|
|
|
||
|
|
while (n && *s)
|
||
|
|
{
|
||
|
|
*d++ = *s++;
|
||
|
|
n--;
|
||
|
|
}
|
||
|
|
|
||
|
|
wmemset(d, 0, n);
|
||
|
|
return a;
|
||
|
|
}
|