Function Com_HexStrToInt

code/qcommon/q_shared.cpp:592–624

=================== Com_HexStrToInt =================== */

 ===================
 */
int Com_HexStrToInt( const char *str )
{
	if ( !str || !str[ 0 ] )
		return -1;

	// check for hex code
	if( str[ 0 ] == '0' && str[ 1 ] == 'x' )
	{
		size_t i, n = 0;

		for( i = 2; i < strlen( str ); i++ )
		{
			char digit;

			n *= 16;

			digit = tolower( str[ i ] );

			if( digit >= '0' && digit <= '9' )
				digit -= '0';
			else if( digit >= 'a' && digit <= 'f' )
				digit = digit - 'a' + 10;
			else
				return -1;

			n += digit;
		}

		return n;
	}

	return -1;
}


/*