libc.info: wcsstr

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`wcsstr'--find a wide-character substring

*Synopsis*
     #include <wchar.h>
     wchar_t *wcsstr(const wchar_t *BIG, const wchar_t *LITTLE);
   *Description*
The `wcsstr' function locates the first occurrence in the
wide-character string pointed to by BIG of the sequence of
wide-characters (excluding the terminating null wide-character) in the
wide-character string pointed to by LITTLE.
*Returns*
On successful completion, `wcsstr' returns a pointer to the located
wide-character string, or a null pointer if the wide-character string
is not found.
   If LITTLE points to a wide-character string with zero length, the
function returns BIG.
*Portability*
`wcsstr' is ISO/IEC 9899/AMD1:1995 (ISO C).