utils/dnp3_src/cpp/tests/opendnp3/src/TestCastLongLongDouble.cpp - master - tisit/OpenPLC_v3

utils/dnp3_src/cpp/tests/opendnp3/src/TestCastLongLongDouble.cpp
79 строк3 KB
thiagoralves
First commit. OpenPLC v3 beta 1
14 июн 2018, 20:43
14 июн 2018, 20:431b10e97
/*
 * Licensed to Green Energy Corp (www.greenenergycorp.com) under one or
 * more contributor license agreements. See the NOTICE file distributed
 * with this work for additional information regarding copyright ownership.
 * Green Energy Corp licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * This project was forked on 01/01/2013 by Automatak, LLC and modifications
 * may have been made to this file. Automatak, LLC licenses these modifications
 * to you under the terms of the License.
 */
#include <catch.hpp>

#include <math.h>

#include <iostream>


#define SUITE(name) "Casting - " name
template <typename T1, typename T2>
T2 TestCast(T1 input)
{
	return static_cast<T2>(input);
}

template <typename T1>
bool IsEqual(T1 a, T1 b)
{
	return a == b;
}

#define CHECK_CAST(t1, t2, a, b)\
	{t2 amod = TestCast<t1, t2>(a);\
	if(!IsEqual<t2>(amod,(b))){\
			std::ostringstream oss;					\
			oss << (#t1)<< "->" << (#t2) << " doesn't cast correctly: " << (amod) << " != " << (b); \
			std::cout << "Failure: " << oss.str() << std::endl;\
	}}


TEST_CASE(SUITE("Casting"))
{
	CHECK_CAST(double, int, 1000.0, 1000);
	CHECK_CAST(double, float, 1001.0, 1001.0f);
	CHECK_CAST(double, long, 1002.0, 1002);
	//these 2 tests fail on the arm device and fail strangley, there
	//is definatley something weird going on here, probably because
	//the 64 bit long long is the same size as a double so just gets
	//shifted into the double strangley. This means that the results
	//of an operation can be different if the casting is done and the
	//result is stored to memory or if the value stays in a register
	//(as an intermediate calculation value), very nasty.
	CHECK_CAST(double, int64_t, 1003.0, 1003);

	CHECK_CAST(int64_t, double, 1004, 1004.0);

	CHECK_CAST(double, float, 1012.0, 1012.0f);
	CHECK_CAST(int64_t, double, 1006, 1006.0);

	CHECK_CAST(int, double, 1007, 1007.0);
	CHECK_CAST(long, double, 1008, 1008.0);
	CHECK_CAST(int, float, 1009, 1009.0f);

	CHECK_CAST(float, int64_t, 1010.0f, 1010);
	CHECK_CAST(float, int, 1011.0f, 1011);

	CHECK_CAST(int64_t, double, 4294967296LL, 4294967296.0);
	CHECK_CAST(double, int64_t, 4294967296.0, 4294967296LL);

}