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88 lines
3.0 KiB
C++
88 lines
3.0 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/core/lightweight_test.hpp>
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#include <boost/config.hpp>
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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_GCC) && BOOST_GCC < 60000 )
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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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// 8 bit
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TEST_EQ( (test<fnv1a_32, default_flavor>( std::int8_t( 0 ) )), 84696351 );
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TEST_EQ( (test<fnv1a_32, default_flavor>( std::uint8_t( 0 ) )), 84696351 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( std::int8_t( -2 ) )), 2064352225 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( std::uint8_t( +1 ) )), 67918732 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( std::int8_t( -2 ) )), 2064352225 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( std::uint8_t( +1 ) )), 67918732 );
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// 16 bit
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TEST_EQ( (test<fnv1a_32, default_flavor>( std::int16_t( 0 ) )), 292984781 );
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TEST_EQ( (test<fnv1a_32, default_flavor>( std::uint16_t( 0 ) )), 292984781 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( std::int16_t( -2 ) )), 3508496442 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( std::uint16_t( +1 ) )), 3950255460 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( std::int16_t( -2 ) )), 3491674896 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( std::uint16_t( +1 ) )), 276207162 );
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// 32 bit
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TEST_EQ( (test<fnv1a_32, default_flavor>( std::int32_t( 0 ) )), 1268118805 );
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TEST_EQ( (test<fnv1a_32, default_flavor>( std::uint32_t( 0 ) )), 1268118805 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( std::int32_t( -2 ) )), 2388331168 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( std::uint32_t( +1 ) )), 4218009092 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( std::int32_t( -2 ) )), 3793096222 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( std::uint32_t( +1 ) )), 1251341186 );
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// 64 bit
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TEST_EQ( (test<fnv1a_32, default_flavor>( std::int64_t( 0 ) )), 2615243109 );
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TEST_EQ( (test<fnv1a_32, default_flavor>( std::uint64_t( 0 ) )), 2615243109 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( std::int64_t( -2 ) )), 751220028 );
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TEST_EQ( (test<fnv1a_32, little_endian_flavor>( std::uint64_t( +1 ) )), 1048580676 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( std::int64_t( -2 ) )), 1806567626 );
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TEST_EQ( (test<fnv1a_32, big_endian_flavor>( std::uint64_t( +1 ) )), 2598465490 );
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return boost::report_errors();
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}
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