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https://github.com/boostorg/safe_numerics.git
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12f5843f90
More carefully defined the concepts. That is the concept of the library is now clear: Trap at either compile or runtime integer operations which yield a result which differs from the normal arithmetic result. Pending on this check in: a) only addition is fixed up so far b) uses BOOST_TYPEOF... rather than decltype(... - final decision sill pending. c) comments out some compile time checks which should be re-instated. d) fixed tests so that they actually work!
143 lines
4.3 KiB
C++
143 lines
4.3 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 <cassert>
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// we could have used decltype and auto for C++11 but we've decided
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// to use boost/typeof to be compatible with older compilers
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#include <boost/typeof/typeof.hpp>
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#include "../include/safe_integer.hpp"
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template<class T1, class T2>
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bool test_add(
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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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std::cout
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<< "testing "
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<< av1 << " + " << av2
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<< std::endl;
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boost::numeric::safe<T1> t1 = v1;
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BOOST_TYPEOF_TPL(T1() +T2()) result;
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try{
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result = t1 + v2;
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if(expected_result == 'x'){
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std::cout
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<< "failed to detect error in addition "
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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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try{
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result = t1 + v2;
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}
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catch(...){}
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return false;
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}
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}
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catch(std::range_error){
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if(expected_result == '.'){
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std::cout
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<< "erroneously detected error in addition "
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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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try{
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result = t1 + v2;
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}
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catch(...){}
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return false;
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}
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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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const char *test_addition_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.............x...x",
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/* 1*/ ".........x...x.............x...x",
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/* 2*/ "..........x...x.........xxxxxxxx",
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/* 3*/ "..........x...x.........xxxxxxxx",
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/* 4*/ ".........x...x.............x...x",
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/* 5*/ ".........x...x.............x...x",
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/* 6*/ "..........x...x.........xxxxxxxx",
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/* 7*/ "..........x...x.........xxxxxxxx",
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/* 8*/ ".........x...x.............x...x",
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/* 9*/ "xx..xx..xx...x..xxxxxxxx...x...x",
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/*10*/ "..xx..xx..xx..x.........xxxxxxxx",
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/*11*/ "..........x...x.........xxxxxxxx",
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/*12*/ ".............x.................x",
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/*13*/ "xx..xx..xx..xx..xxxxxxxxxxxx...x",
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/*14*/ "..xx..xx..xx..xx............xxxx",
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/*15*/ "..............x.............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.............x...x",
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/*17*/ ".........x...x.............x...x",
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/*18*/ ".........x...x.............x...x",
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/*19*/ ".........x...x.............x...x",
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/*20*/ ".........x...x.............x...x",
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/*21*/ ".........x...x.............x...x",
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/*22*/ ".........x...x.............x...x",
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/*23*/ ".........x...x.............x...x",
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/*24*/ "..xx..xx..xx.x.............x...x",
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/*25*/ "..xx..xx..xx.x.............x...x",
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/*26*/ "..xx..xx..xx.x............xx...x",
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/*27*/ "xxxxxxxxxxxx.x..xxxxxxxxxxxx...x",
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/*28*/ "..xx..xx..xx..xx...............x",
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/*29*/ "..xx..xx..xx..xx...............x",
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/*30*/ "..xx..xx..xx..xx..............xx",
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/*31*/ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
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};
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#define TEST_IMPL(v1, v2, result) \
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rval &= test_add( \
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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_addition_result[value_index1][value_index2] \
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)
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/**/
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#define COUNT sizeof(test_addition_result)
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int main(int argc, char * argv[]){
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// sanity check on test matrix - should be symetrical
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for(int i = 0; i < VALUE_ARRAY_SIZE; ++i)
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for(int j = i + 1; j < VALUE_ARRAY_SIZE; ++j)
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assert(test_addition_result[i][j] == test_addition_result[j][i]);
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bool rval = true;
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TEST_EACH_VALUE_PAIR
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return ! rval ;
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}
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