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