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1 | // (C) Copyright 2018 Mario Suvajac |
2 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
3 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) | |
4 | ||
5 | // See http://www.boost.org/libs/iostreams for documentation. | |
6 | ||
7 | #include <boost/iostreams/detail/adapter/non_blocking_adapter.hpp> | |
8 | #include <boost/iterator/counting_iterator.hpp> | |
9 | #include <boost/test/unit_test.hpp> | |
10 | #include <boost/iostreams/categories.hpp> | |
11 | ||
12 | #include <algorithm> | |
13 | ||
14 | // Source that reads only one byte every time read() is called. | |
15 | class read_one_source | |
16 | { | |
17 | public: | |
18 | typedef char char_type; | |
19 | typedef boost::iostreams::source_tag category; | |
20 | ||
21 | template <std::size_t N> | |
22 | read_one_source(const char (&data)[N]) | |
23 | : data_size_m(N), data_m(data), pos_m(0) | |
24 | { | |
25 | } | |
26 | ||
27 | std::streamsize read(char* s, std::streamsize n) | |
28 | { | |
29 | if (pos_m < data_size_m && n > 0) | |
30 | { | |
31 | *s = data_m[pos_m++]; | |
32 | return 1; | |
33 | } | |
34 | else | |
35 | { | |
36 | return -1; | |
37 | } | |
38 | } | |
39 | ||
40 | private: | |
41 | std::size_t data_size_m; | |
42 | const char* data_m; | |
43 | std::size_t pos_m; | |
44 | }; | |
45 | ||
46 | void nonblocking_read_test() | |
47 | { | |
48 | static const int data_size_k = 100; | |
49 | ||
50 | char data[data_size_k]; | |
51 | std::copy(boost::counting_iterator<char>(0), | |
52 | boost::counting_iterator<char>(data_size_k), | |
53 | data); | |
54 | ||
55 | read_one_source src(data); | |
56 | boost::iostreams::non_blocking_adapter<read_one_source> nb(src); | |
57 | ||
58 | char read_data[data_size_k]; | |
59 | std::streamsize amt = boost::iostreams::read(nb, read_data, data_size_k); | |
60 | ||
61 | BOOST_CHECK_EQUAL(amt, data_size_k); | |
62 | ||
63 | for (int i = 0; i < data_size_k; ++i) | |
64 | { | |
65 | BOOST_CHECK_EQUAL(std::char_traits<char>::to_int_type(read_data[i]), i); | |
66 | } | |
67 | } | |
68 | ||
69 | boost::unit_test::test_suite* init_unit_test_suite(int, char* []) | |
70 | { | |
71 | boost::unit_test::test_suite* test = BOOST_TEST_SUITE("non-blocking read test"); | |
72 | test->add(BOOST_TEST_CASE(&nonblocking_read_test)); | |
73 | return test; | |
74 | } |