int main()
{
const int n = 123456789 ;
print_with_commas(n) ;
std::cout << '\n' ;
{
// method two; works for all numeric types
// see: http://en.cppreference.com/w/cpp/locale/numpunct/grouping
struct with_commas : std::numpunct<char>
{
protected:
// group every three digits before the decimal point
virtual std::string do_grouping() const override {
return "\3";
}
// use ',' as the group seperator
virtual char do_thousands_sep() const override {
return ',' ;
}
};
// see: http://en.cppreference.com/w/cpp/io/basic_ios/imbue
// http://en.cppreference.com/w/cpp/locale/locale/locale overload (7)
// the locale calls delete on the facet when it is destroyed.
std::cout.imbue( std::locale( std::cout.getloc(), new with_commas ) );
std::cout << n << '\n' ;
}
}
/*******************************************************************************
*
* PRINT_WITH_COMMAS
*
* This is a quick hack to print positive decimal numbers with thousands
* separators. It calls itself recursively to print from left-to-right
* whenever the value is >1000 and thus needs a comma.
*/
void print_with_commas( uint num ) {
if( num < 1000 )
printf( "%d", num );
else {
print_with_commas( num/1000 );
printf( ",%03d", num%1000 );
}
}
int startTest(const char* vf)
{
uchar *vd; // a pointer to our loaded vector data
int ret = 0; // our return -- non-zero for any failure
int datalength; // length of the vector data file
printf( "\n" ); // give us a blank line beneath the command invocation
gcm_initialize(); // initialize our GCM library once before first use
// attempt to load the test vectors file and report any problems
switch ( datalength = load_file_into_ram( vf, &vd ) )
{
case -1: printf( "Test vector file \"%s\" not found!\n", vf );
return datalength; // return status to OS
case -2: printf( "Unable to allocate RAM for vector file!\n" );
return datalength; // return status to OS
case -3: printf( "Error reading test vector file into memory!\n" );
return datalength; // return status to OS
default: print_with_commas( datalength );
printf( " bytes of test vector data read.\n\n" );
}
// run through and verify all of the NIST AES-GCM test vectors
ret = verify_gcm( vd );
free( vd ); // release our test vector file allocation
// print the total number of tests that passed.
print_with_commas( testcount );
printf( " tests performed.\n\n" );
// and deliver the final test suite outcome.
printf( "NIST AES-GCM validation test suite: " );
if( ret )
printf( "FAILED!!\n" );
else
printf( "PASSED!!\n" );
return( ret ); // exit the program returning status to caller
}
// method one; works for integer types
void print_with_commas( unsigned int n )
{
if( n < 1000 )
{
std::cout << n ;
}
else
{
int remainder = n % 1000 ;
print_with_commas( n / 1000 ) ;
std::cout << ',' << remainder ;
}
}
