wcspbrk - search a wide-character string for any of a set of wide characters
wcs, const wchar_t *accept);
The wcspbrk function is the wide-character equivalent
of the strpbrk function. It searches for the first
occurrence in the wide-character string pointed to by
wcs of any of the characters in the wide-character
string pointed to by accept.
The wcspbrk function returns a pointer to the first
occurrence in wcs of any of the characters listed in
accept. If wcs contains none of these
characters, NULL is returned.
ISO/ANSI C, UNIX98