Copies the first n wide characters of a string to another location
#include <wchar.h> wchar_t *wcsncpy ( const wchar_t * restrict dest , const wchar_t * restrict src , size_t n );
The wcsncpy( ) function copies at most n wide characters from the string addressed by src to the wchar_t array addressed by dest, which must be large enough to accommodate n wide characters. The wcsncpy( ) function returns the value of its first argument, dest. The locations that wcsncpy( ) reads from and writes to using its restricted pointer parameters must not overlap.
If wcsncpy( ) reads a null wide character from src before it has copied n wide characters, then the function writes null wide characters to dest until it has written a total of n wide characters.