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1 | /////////////////////////////////////////////////////////////// |
2 | // Copyright 2015 John Maddock. Distributed under the Boost | |
3 | // Software License, Version 1.0. (See accompanying file | |
92f5a8d4 | 4 | // LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt |
7c673cae FG |
5 | |
6 | #include <boost/multiprecision/cpp_bin_float.hpp> | |
7 | #include <iostream> | |
8 | #include <iomanip> | |
9 | #include <vector> | |
10 | #include <iterator> | |
11 | ||
92f5a8d4 TL |
12 | // Contains Quickbook snippets in comments. |
13 | ||
7c673cae FG |
14 | //[IE2 |
15 | ||
16 | /*` | |
17 | Importing or exporting cpp_bin_float is similar, but we must procede via an intermediate integer: | |
18 | */ | |
19 | /*= | |
20 | #include <boost/multiprecision/cpp_bin_float.hpp> | |
21 | #include <iostream> | |
22 | #include <iomanip> | |
23 | #include <vector> | |
24 | #include <iterator> | |
25 | */ | |
26 | ||
27 | int main() | |
28 | { | |
29 | using boost::multiprecision::cpp_bin_float_100; | |
30 | using boost::multiprecision::cpp_int; | |
31 | // Create a cpp_bin_float to import/export: | |
32 | cpp_bin_float_100 f(1); | |
33 | f /= 3; | |
34 | // export into 8-bit unsigned values, most significant bit first: | |
35 | std::vector<unsigned char> v; | |
36 | export_bits(cpp_int(f.backend().bits()), std::back_inserter(v), 8); | |
37 | // Grab the exponent as well: | |
38 | int e = f.backend().exponent(); | |
39 | // Import back again, and check for equality, we have to procede via | |
40 | // an intermediate integer: | |
41 | cpp_int i; | |
42 | import_bits(i, v.begin(), v.end()); | |
43 | cpp_bin_float_100 g(i); | |
44 | g.backend().exponent() = e; | |
92f5a8d4 | 45 | BOOST_ASSERT(f == g); |
7c673cae FG |
46 | } |
47 | ||
48 | //] | |
49 |