Locates the first occurrence of a specified wide character in an
    array of wide characters.

    Format

      #include  <wchar.h>

      wchar_t wmemchr  (const wchar_t *s, wchar_t c, size_t n);

1 - Function Variants

    The wmemchr function has variants named _wmemchr32 and _wmemchr64
    for use with 32-bit and 64-bit pointer sizes, respectively.

2 - Arguments

 s

    A pointer to an array of wide characters to be searched.

 c

    The wide character value to search for.

 n

    The maximum number of wide characters in the array to be
    searched.

3 - Description

    The wmemchr function locates the first occurrence of the
    specified wide character in the initial n wide characters of
    the array pointed to by s.

4 - Return Values

    x                  A pointer to the first occurrence of the wide
                       character in the array.
    NULL               The specified wide character does not occur in
                       the array.