130 lines
3.3 KiB
C++
130 lines
3.3 KiB
C++
// Copyright (c) 2012 Robert Ramey
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <iostream>
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#include <boost/core/demangle.hpp>
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#include <boost/safe_numerics/checked_result_operations.hpp>
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#include <boost/safe_numerics/checked_integer.hpp>
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template<class T>
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bool test_checked_modulus(
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T v1,
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T v2,
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char expected_result
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){
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using namespace boost::safe_numerics;
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const T result = v1 % v2;
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std::cout
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<< v1 << " % " << v2 << " -> " << result
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<< std::endl;
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switch(expected_result){
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case '.':
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case '0':
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if(result.exception()){
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std::cout
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<< "erroneously detected error in division"
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<< std::endl;
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v1 % v2;
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return false;
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}
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if(expected_result == '0'
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&& result != T(0)
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){
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std::cout
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<< "failed to get expected zero result "
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<< std::endl;
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v1 % v2;
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return false;
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}
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return true;
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case '-':
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if(safe_numerics_error::negative_overflow_error == result.m_e)
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return true;
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case '+':
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if(safe_numerics_error::positive_overflow_error == result.m_e)
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return true;
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case '!':
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if(safe_numerics_error::range_error == result.m_e)
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return true;
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}
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std::cout
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<< "failed to detect error in modulus "
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<< std::hex << result << "(" << std::dec << result << ")"
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<< " != "<< v1 << " % " << v2
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<< std::endl;
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v1 % v2;
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return false;
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}
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#include "test_checked_modulus.hpp"
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template<typename T, typename First, typename Second>
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struct test_signed_pair {
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bool operator()() const {
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std::size_t i = First();
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std::size_t j = Second();
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std::cout << std::dec << i << ',' << j << ','
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<< "testing " << boost::core::demangle(typeid(T).name()) << ' ';
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return test_checked_modulus(
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signed_values<T>[i],
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signed_values<T>[j],
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signed_modulus_results[i][j]
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);
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};
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};
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template<typename T, typename First, typename Second>
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struct test_unsigned_pair {
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bool operator()() const {
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std::size_t i = First();
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std::size_t j = Second();
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std::cout << std::dec << i << ',' << j << ','
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<< "testing " << boost::core::demangle(typeid(T).name()) << ' ';
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return test_checked_modulus(
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unsigned_values<T>[i],
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unsigned_values<T>[j],
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unsigned_modulus_results[i][j]
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);
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};
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};
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#include <boost/mp11/algorithm.hpp>
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int main(){
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using namespace boost::mp11;
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bool rval = true;
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std::cout << "*** testing signed values\n";
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mp_for_each<
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mp_product<
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test_signed_pair,
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signed_test_types,
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signed_value_indices,
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signed_value_indices
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>
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>([&](auto I){
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rval &= I();
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});
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std::cout << "*** testing unsigned values\n";
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mp_for_each<
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mp_product<
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test_unsigned_pair,
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unsigned_test_types,
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unsigned_value_indices, unsigned_value_indices
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>
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>([&](auto I){
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rval &= I();
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});
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std::cout << (rval ? "success!" : "failure") << std::endl;
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return rval ? 0 : 1;
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}
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