Go forward to wcsncat
Go backward to wcslcpy
Go up to Wchar strings
Go to the top op libc

`wcslen'--get wide-character string length

     #include <wchar.h>
     size_t wcslen(const wchar_t *S);
The `wcslen' function computes the number of wide-character codes in
the wide-character string to which S points, not including the
terminating null wide-character code.
The `wcslen' function returns the length of S; no return value is
reserved to indicate an error.
`wcslen' is ISO/IEC 9899/AMD1:1995 (ISO C).  No supporting OS
subroutines are required.