Library /sys$common/syshlp/helplib.hlb  —  CRTL  wcsxfrm  Return Values
    x                  Length of the resulting string pointed to
                       by ws1, not including the terminating null
                       character.
    (size_t) -1        Indicates that an error occurred. The function
                       sets errno to EINVAL - The string pointed to
                       by ws2 contains characters outside the domain
                       of the collating sequence.
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