75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
// (C) Copyright 2018 Mario Suvajac
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
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// See http://www.boost.org/libs/iostreams for documentation.
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#include <boost/iostreams/detail/adapter/non_blocking_adapter.hpp>
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#include <boost/iterator/counting_iterator.hpp>
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#include <boost/test/unit_test.hpp>
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#include <boost/iostreams/categories.hpp>
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#include <algorithm>
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// Source that reads only one byte every time read() is called.
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class read_one_source
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{
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public:
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typedef char char_type;
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typedef boost::iostreams::source_tag category;
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template <std::size_t N>
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read_one_source(const char (&data)[N])
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: data_size_m(N), data_m(data), pos_m(0)
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{
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}
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std::streamsize read(char* s, std::streamsize n)
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{
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if (pos_m < data_size_m && n > 0)
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{
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*s = data_m[pos_m++];
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return 1;
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}
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else
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{
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return -1;
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}
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}
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private:
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std::size_t data_size_m;
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const char* data_m;
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std::size_t pos_m;
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};
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void nonblocking_read_test()
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{
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static const int data_size_k = 100;
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char data[data_size_k];
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std::copy(boost::counting_iterator<char>(0),
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boost::counting_iterator<char>(data_size_k),
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data);
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read_one_source src(data);
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boost::iostreams::non_blocking_adapter<read_one_source> nb(src);
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char read_data[data_size_k];
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std::streamsize amt = boost::iostreams::read(nb, read_data, data_size_k);
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BOOST_CHECK_EQUAL(amt, data_size_k);
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for (int i = 0; i < data_size_k; ++i)
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{
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BOOST_CHECK_EQUAL(std::char_traits<char>::to_int_type(read_data[i]), i);
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}
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}
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boost::unit_test::test_suite* init_unit_test_suite(int, char* [])
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{
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boost::unit_test::test_suite* test = BOOST_TEST_SUITE("non-blocking read test");
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test->add(BOOST_TEST_CASE(&nonblocking_read_test));
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return test;
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}
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