__wcsncat_chk -- concatenate two wide-character strings, with buffer overflow checking


#include <wchar.h>

wchar_t * __wcsncat_chk(wchar_t * dest, const wchar_t * src, size_t n, size_t destlen);


The interface __wcsncat_chk() shall function in the same way as the interface wcsncat(), except that __wcsncat_chk() shall check for buffer overflow before computing a result. If an overflow is anticipated, the function shall abort and the program calling it shall exit.

The parameter destlen specifies the size of the object pointed to by dest.

The __wcsncat_chk() function is not in the source standard; it is only in the binary standard.