The wcscmp function compares the wide characters in wstr_1 with
    those in wstr_2. If the characters differ, the function returns:

    o  An integer less than 0, if the codepoint of the first
       differing character in wstr_1 is less than the codepoint of
       the corresponding character in wstr_2

    o  An integer greater than 0, if the codepoint of the first
       differing character in wstr_1 is greater than the codepoint
       of the corresponding character in wstr_2

    If the wide-characters strings are identical, the function
    returns 0.

    Unlike the wcscoll function, the wcscmp function compares the
    string based on the binary value of each wide character.

    See also wcsncmp.