mirror of
https://github.com/boostorg/safe_numerics.git
synced 2026-02-02 21:12:17 +00:00
80e17943ca
refined type requirements for integer vs numeric fixed bugs in safe literal added acknowledgement to documentation
114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
#include <iostream>
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#include <cassert>
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#include <limits>
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#include "../include/utility.hpp"
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#include "../include/safe_range.hpp"
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template<typename T>
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void display_log(T Max){
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std::cout
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<< "log(" << Max << ") = "
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<< boost::numeric::log(Max) << std::endl;
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}
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bool test_log(){
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using namespace boost::numeric;
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assert(log(127u) == 7); // 7 bits
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assert(log(127u) == 7); // 7 bits
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assert(log(128u) == 8); // 8 bits
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assert(log(129u) == 8); // 8 bits
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assert(log(255u) == 8); // 8 bits
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assert(log(256u) == 9); // 9 bits
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assert(log(127) == 8); // 7 bits + 1 sign bit
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assert(log(128) == 9); // 8 bits + 1 sign bit
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assert(log(129) == 9); // 8 bits + 1 sign bit
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assert(log(255) == 9); // 8 bits + 1 sign bit
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assert(log(256) == 10); // 9 bits + 1 sign bit
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assert(log(-127) == 8); // 7 bits + 1 sign bit
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assert(log(-128) == 8); // 7 bits + 1 sign bit
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assert(log(-129) == 9); // 8 bits + 1 sign bit
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assert(log(-255) == 9); // 8 bits + 1 sign bit
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assert(log(-256) == 9); // 8 bits + 1 sign bit
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return true;
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}
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bool test1(){
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using namespace boost::numeric;
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safe_signed_range<-128, 127> s1(1);
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safe_signed_range<-256, 254> s2(2);
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using t2 = safe_unsigned_range<0u, 1000u>;
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static_assert(
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std::numeric_limits<t2>::is_signed == false,
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"this range should be unsigned"
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);
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return true;
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}
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#include "../include/automatic.hpp"
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template <
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std::intmax_t Min,
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std::intmax_t Max
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>
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using safe_t = boost::numeric::safe_signed_range<
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Min,
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Max,
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boost::numeric::automatic,
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boost::numeric::throw_exception
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>;
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bool test2(){
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std::cout << "test1" << std::endl;
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try{
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const safe_t<-64, 63> x(1);
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safe_t<-64, 63> y;
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y = 2;
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std::cout << "x = " << x << std::endl;
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std::cout << "y = " << y << std::endl;
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auto z = x + y;
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std::cout << "x + y = ["
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<< std::numeric_limits<decltype(z)>::min() << ","
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<< std::numeric_limits<decltype(z)>::max() << "] = "
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<< z << std::endl;
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auto z2 = x - y;
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std::cout << "x - y = ["
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<< std::numeric_limits<decltype(z2)>::min() << ","
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<< std::numeric_limits<decltype(z2)>::max() << "] = "
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<< z2 << std::endl;
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short int yi, zi;
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yi = y;
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zi = x + yi;
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}
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catch(std::exception e){
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// none of the above should trap. Mark failure if they do
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std::cout << e.what() << std::endl;
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return false;
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}
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return true;
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}
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int main(){
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//using namespace boost::numeric;
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//safe_signed_literal2<100> one_hundred;
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//one_hundred = 200;
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bool rval =
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test_log() &&
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test1() &&
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test2() /* &&
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test3() &&
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test4()
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*/
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;
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std::cout << (rval ? "success!" : "failure") << std::endl;
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return rval ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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