__vwprintf_chk -- convert formatted wide-character output, with stack checking


#include <wchar.h>

int __vwprintf_chk(int flag, const wchar_t * format, va_list ap);


The interface __vwprintf_chk() shall function in the same way as the interface vwprintf(), except that __vwprintf_chk() shall check for stack overflow before computing a result, depending on the value of the flag parameter. If an overflow is anticipated, the function shall abort and the program calling it shall exit.

In general, the higher the value of flag, the more security measures this interface shall take in the form of checking the stack, parameter values, and so on.

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