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- //---------------------------------------------------------------------------//
- // Copyright (c) 2016 Jason Rhinelander <jason@imaginary.ca>
- //
- // Distributed under the Boost Software License, Version 1.0
- // See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt
- //
- // See http://boostorg.github.com/compute for more information.
- //---------------------------------------------------------------------------//
- #define BOOST_TEST_MODULE TestLiteralConversion
- #include <boost/test/unit_test.hpp>
- #include <string>
- #include <sstream>
- #include <vector>
- #include <boost/compute/detail/literal.hpp>
- BOOST_AUTO_TEST_CASE(literal_conversion_float)
- {
- std::vector<float> values, roundtrip;
- values.push_back(1.2345679f);
- values.push_back(1.2345680f);
- values.push_back(1.2345681f);
- for (size_t i = 0; i < values.size(); i++) {
- std::string literal = boost::compute::detail::make_literal(values[i]);
- // Check that we got something in the literal, and that at least the first
- // 6 characters (5 digits) look good
- BOOST_CHECK_EQUAL(literal.substr(0, 6), "1.2345");
- // libc++ stream extraction fails on a value such as "1.2f" rather than extracting 1.2
- // and leaving the f; so check the "f", then slice it off for the extraction below:
- BOOST_CHECK_EQUAL(literal.substr(literal.length()-1), "f");
- std::istringstream iss(literal.substr(0, literal.length()-1));
- float x;
- iss >> x;
- roundtrip.push_back(x);
- }
- BOOST_CHECK_EQUAL(values[0], roundtrip[0]);
- BOOST_CHECK_EQUAL(values[1], roundtrip[1]);
- BOOST_CHECK_EQUAL(values[2], roundtrip[2]);
- }
- BOOST_AUTO_TEST_CASE(literal_conversion_double)
- {
- std::vector<double> values, roundtrip;
- values.push_back(1.2345678901234567);
- values.push_back(1.2345678901234569);
- values.push_back(1.2345678901234571);
- for (size_t i = 0; i < values.size(); i++) {
- std::string literal = boost::compute::detail::make_literal(values[i]);
- // Check that we got something in the literal, and that at least the first
- // 11 characters (10 digits) look good
- BOOST_CHECK_EQUAL(literal.substr(0, 11), "1.234567890");
- // Stuff the literal into a stream then extract it, and make sure we get a numerically
- // identical result. (Since there is no suffix, we don't have to worry about removing the
- // suffix like we have to above, for float--but we also check to make sure there is no
- // (unextracted) suffix).
- std::istringstream iss(literal);
- double x;
- std::string suffix;
- iss >> x >> suffix;
- BOOST_CHECK_EQUAL(suffix, "");
- roundtrip.push_back(x);
- }
- BOOST_CHECK_EQUAL(values[0], roundtrip[0]);
- BOOST_CHECK_EQUAL(values[1], roundtrip[1]);
- BOOST_CHECK_EQUAL(values[2], roundtrip[2]);
- }
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