nuttx/libs/libc/wchar/lib_wcswcs.c
guoshichao f9c8461c72 libs/libc/wchar: add wcswcs implementation
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
2023-09-22 08:51:07 +08:00

58 lines
2.3 KiB
C

/****************************************************************************
* libs/libc/wchar/lib_wcswcs.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: wcswcs
*
* Description:
* Locate substring of wide string
*
* Input Parameters:
* haystack - the wide string to be scanned
* needle - the wide string containing the sequence of characters to match
*
* Returned Value:
* Return a pointer to the first occurrence in "h" of the entire sequence
* of characters specified in "n";
* Return null pointer if the sequence is not present in "h"
*
****************************************************************************/
FAR wchar_t *wcswcs(FAR const wchar_t *haystack, FAR const wchar_t *needle)
{
return wcsstr(haystack, needle);
}