wcsncat
(3)concatenate two wide-character strings
#include <wchar.h> wchar_t *wcsncat(wchar_t dest[restrict .n], const wchar_t src[restrict .n], size_t n);
LIBRARY
DESCRIPTION
The wcsncat() function is the wide-character equivalent of the strncat(3) function. It copies at most n wide characters from the wide-character string pointed to by src to the end of the wide-character string pointed to by dest, and adds a terminating null wide character (L'\0').
The strings may not overlap.
The programmer must ensure that there is room for at least wcslen(dest)+n+1 wide characters at dest.