mirror of
https://github.com/boostorg/safe_numerics.git
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138 lines
4.1 KiB
C++
138 lines
4.1 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 <exception>
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#include <cstdlib> // EXIT_SUCCESS
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#include <iostream>
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#include <cassert>
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#include "../include/checked_result.hpp"
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#include "../include/checked.hpp"
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template<class T1, class T2>
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bool test_checked_subtract(
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T1 v1,
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T2 v2,
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const char *av1,
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const char *av2,
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char expected_result
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){
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using namespace boost::numeric;
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std::cout
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<< "testing "
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<< av1 << " + " << av2
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<< std::endl;
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using result_type = decltype(T1() + T2());
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checked_result<result_type> result
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= checked::subtract<result_type>(v1, v2);
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if(result.no_exception()
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&& expected_result != '.'){
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std::cout
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<< "failed to detect error in subtraction "
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<< std::hex << result << "(" << std::dec << result << ")"
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<< " != "<< av1 << " + " << av2
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<< std::endl;
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result = checked::subtract<result_type>(v1, v2);
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return false;
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}
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else
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if(! result.no_exception()
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&& expected_result != 'x'){
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std::cout
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<< "erroneously detected error "
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<< std::hex << result << av1 << " + " << av2
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<< std::endl;
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result = checked::subtract<result_type>(v1, v2);
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return false;
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}
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return true; // correct result
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}
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#include "test.hpp"
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#include "test_values.hpp"
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// note: same test matrix as used in test_add. Here we test all combinations
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// safe and unsafe integers. in test_checked we test all combinations of
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// integer primitives
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const char *test_subtraction_result[VALUE_ARRAY_SIZE] = {
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// 0 0 0 0
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// 01234567012345670123456701234567
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// 01234567890123456789012345678901
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/* 0*/ "..........x...x..........xxx.xxx",
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/* 1*/ "..........x...x..........xxx.xxx",
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/* 2*/ ".........x...x..........xxxxxxxx",
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/* 3*/ "........................xxxxxxxx",
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/* 4*/ "..........x...x..........xxx.xxx",
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/* 5*/ "..........x...x..........xxx.xxx",
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/* 6*/ ".........x...x..........xxxxxxxx",
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/* 7*/ "........................xxxxxxxx",
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/* 8*/ "..........x...x..........xxx.xxx",
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/* 9*/ "..xx..xx..xx..x...........xx.xxx",
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/*10*/ "xx..xx..xx...x..xxxxxxxxxxxxxxxx",
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/*11*/ "........................xxxxxxxx",
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/*12*/ "..............x..............xxx",
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/*13*/ "..xx..xx..xx..xx..............xx",
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/*14*/ "xx..xx..xx..xx..xxxxxxxxxxxxxxxx",
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/*15*/ "............................xxxx",
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// 0 0 0 0
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// 01234567012345670123456701234567
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// 01234567890123456789012345678901
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/*16*/ "..........x...x..........xxx.xxx",
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/*17*/ "..........x...x..........xxx.xxx",
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/*18*/ "..........x...x..........xxx.xxx",
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/*19*/ "..........x...x..........xxx.xxx",
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/*20*/ "..........x...x..........xxx.xxx",
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/*21*/ "..........x...x..........xxx.xxx",
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/*22*/ "..........x...x..........xxx.xxx",
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/*23*/ "..........x...x..........xxx.xxx",
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/*24*/ ".xxx.xxx.xxx..x..xxx.xxx.xxx.xxx",
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/*25*/ "..xx..xx..xx..x...........xx.xxx",
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/*26*/ "..xx..xx..xx..x............x.xxx",
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/*27*/ "..xx..xx..xx..x..............xxx",
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/*28*/ ".xxx.xxx.xxx.xxx.xxx.xxx.xxx.xxx",
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/*29*/ "..xx..xx..xx..xx..............xx",
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/*30*/ "..xx..xx..xx..xx...............x",
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/*31*/ "..xx..xx..xx..xx................"
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};
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#define TEST_IMPL(v1, v2, result) \
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rval &= test_checked_subtract( \
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v1, \
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v2, \
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BOOST_PP_STRINGIZE(v1), \
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BOOST_PP_STRINGIZE(v2), \
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result \
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);
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/**/
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#define TESTX(value_index1, value_index2) \
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(std::cout << value_index1 << ',' << value_index2 << ','); \
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TEST_IMPL( \
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BOOST_PP_ARRAY_ELEM(value_index1, VALUES), \
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BOOST_PP_ARRAY_ELEM(value_index2, VALUES), \
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test_subtraction_result[value_index1][value_index2] \
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)
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/**/
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int main(int argc, char *argv[]){
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bool rval = true;
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TEST_EACH_VALUE_PAIR
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std::cout << (rval ? "success!" : "failure") << std::endl;
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return ! rval ;
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}
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