The wcschr() function is the wide-character equivalent of
the strchr(3) function. It searches the first occurrence of wc
in the wide-character string pointed to by wcs.
RETURN VALUE
The wcschr() function returns a pointer to the first
occurrence of wc in the wide-character string pointed to by
wcs, or NULL if wc does not occur in the string.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).