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92 lines
3.3 KiB
C++
92 lines
3.3 KiB
C++
// Copyright 2024 Peter Dimov
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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#include <boost/hash2/hash_append.hpp>
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#include <boost/hash2/fnv1a.hpp>
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#include <boost/hash2/detail/config.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <boost/config.hpp>
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#include <limits>
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#include <cstdint>
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#if defined(BOOST_MSVC) && BOOST_MSVC < 1920
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# pragma warning(disable: 4307) // integral constant overflow
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#endif
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template<class Hash, class Flavor, class T>
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BOOST_CXX14_CONSTEXPR typename Hash::result_type test( T const& v )
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{
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Hash h;
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Flavor f{};
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hash_append( h, f, v );
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return h.result();
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}
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#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
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#if defined(BOOST_NO_CXX14_CONSTEXPR) || !defined(BOOST_HASH2_HAS_BUILTIN_BIT_CAST)
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# define TEST_EQ(x1, x2) BOOST_TEST_EQ(x1, x2)
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#else
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# define TEST_EQ(x1, x2) BOOST_TEST_EQ(x1, x2); STATIC_ASSERT(x1 == x2)
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#endif
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int main()
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{
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using namespace boost::hash2;
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// float
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TEST_EQ( (test<fnv1a_32, default_flavor>( +0.0f )), 1268118805 );
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TEST_EQ( (test<fnv1a_32, default_flavor>( -0.0f )), 1268118805 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( +1.0f )), 1902468634 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( -1.0f )), 1106845850 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( +3.14f )), 1979491385 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( -3.14f )), 1566646201 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( +std::numeric_limits<float>::infinity() )), 1716885978 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( -std::numeric_limits<float>::infinity() )), 921263194 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( +1.0f )), 458782360 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( -1.0f )), 2606317592 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( +3.14f )), 2486333141 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( -3.14f )), 338797909 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( +std::numeric_limits<float>::infinity() )), 1532549976 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( -std::numeric_limits<float>::infinity() )), 3680085208 );
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// double
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TEST_EQ( (test<fnv1a_32, default_flavor>( +0.0 )), 2615243109 );
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TEST_EQ( (test<fnv1a_32, default_flavor>( -0.0 )), 2615243109 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( +1.0 )), 2880721802 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( -1.0 )), 1348582922 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( +3.14 )), 1565379100 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( -3.14 )), 555586716 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( +std::numeric_limits<double>::infinity() )), 682495434 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( -std::numeric_limits<double>::infinity() )), 3445323850 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( +1.0 )), 2355796088 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( -1.0 )), 208260856 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( +3.14 )), 4023697370 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( -3.14 )), 1876162138 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( +std::numeric_limits<double>::infinity() )), 3429563704 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( -std::numeric_limits<double>::infinity() )), 1282028472 );
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return boost::report_errors();
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}
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