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
main()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 }
75