ceph/src/boost/libs/multiprecision/test/test_cpp_int_conv.cpp

   1 ///////////////////////////////////////////////////////////////
   2 //  Copyright 2012 John Maddock. Distributed under the Boost
   3 //  Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
   5 //
   6
   7 #ifdef _MSC_VER
   8 #define _SCL_SECURE_NO_WARNINGS
   9 #endif
  10
  11 #include <boost/detail/lightweight_test.hpp>
  12 #include <boost/array.hpp>
  13 #include "test.hpp"
  14
  15 #include <boost/multiprecision/cpp_int.hpp>
  16
  17 int main()
  18 {
  19    using namespace boost::multiprecision;
  20    //
  21    // Test interconversions between different precisions:
  22    //
  23    cpp_int                                                           i1(2);
  24    int128_t                                                          i2(3);
  25    int256_t                                                          i3(4);
  26    number<cpp_int_backend<32, 32, signed_magnitude, checked, void> > i4(5);
  27
  28    i1 = i3;
  29    BOOST_TEST(i1 == 4);
  30    i1 = i4;
  31    BOOST_TEST(i1 == 5);
  32
  33    i3 = -1234567;
  34    i4 = -5677334;
  35    i1 = i3;
  36    BOOST_TEST(i1 == -1234567);
  37    i1 = i4;
  38    BOOST_TEST(i1 == -5677334);
  39
  40    i3 = i2;
  41    BOOST_TEST(i3 == 3);
  42
  43    i3 = -1234567;
  44
  45    uint128_t i5(i3);
  46    BOOST_TEST(i5 == -1234567);
  47
  48    int128_t i6(i4);
  49    BOOST_TEST(i6 == -5677334);
  50
  51    number<cpp_int_backend<32, 32, signed_magnitude, unchecked, void>, et_off> i7(i3);
  52    BOOST_TEST(i7 == -1234567);
  53
  54    int256_t i8(i6);
  55    BOOST_TEST(i8 == -5677334);
  56
  57    i7.assign(4.0);
  58    BOOST_TEST(i7 == 4);
  59
  60    number<cpp_int_backend<30, 30, signed_magnitude, checked, void>, et_off> i9(-5677334);
  61    i7 = i9;
  62    BOOST_TEST(i7 == -5677334);
  63    i7 = number<cpp_int_backend<32, 32, signed_magnitude, checked, void>, et_off>(i9);
  64    BOOST_TEST(i7 == -5677334);
  65
  66    i9 = static_cast<number<cpp_int_backend<30, 30, signed_magnitude, checked, void>, et_off> >(i7);
  67    BOOST_TEST(i9 == -5677334);
  68
  69    ++i9;
  70    i7 = i9;
  71    BOOST_TEST(i7 == 1 - 5677334);
  72
  73    return boost::report_errors();
  74 }