wmemchr
wchar_t *wmemchr(const wchar_t *, wchar_t, size_t);
#define MEMCHR(a, b, c) wmemchr(a, b, c)
(cclcompl ? (wmemchr(ccls, (_c), (size_t)(ccle - ccls)) == NULL) : \
(wmemchr(ccls, (_c), (size_t)(ccle - ccls)) != NULL))
wp = wmemchr(wcval->vals, L'\0', CCHARW_MAX);