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`wcscpy'--copy a wide-character string

     #include <wchar.h>
     wchar_t *wcscpy(wchar_t *S1, const wchar_t *,S2);
The `wcscpy' function copies the wide-character string pointed to by S2
(including the terminating null wide-character code) into the array
pointed to by S1. If copying takes place between objects that overlap,
the behaviour is undefined.
The `wcscpy' function returns S1; no return value is reserved to
indicate an error.
`wcscpy' is ISO/IEC 9899/AMD1:1995 (ISO C).  No supporting OS
subroutines are required.