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86 lines
2.9 KiB
C++
86 lines
2.9 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 <cstdint>
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template<class Hash, class Flavor, class T> void test( T const& v, unsigned char const (&ref)[ sizeof(T) ] )
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{
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{
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typename Hash::result_type r1, r2;
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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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r1 = h.result();
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}
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{
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Hash h;
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h.update( ref, sizeof(ref) );
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r2 = h.result();
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}
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BOOST_TEST_EQ( r1, r2 );
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}
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}
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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<fnv1a_32, default_flavor>( std::int8_t( 0 ), { 0x00 } );
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test<fnv1a_32, default_flavor>( std::uint8_t( 0 ), { 0x00 } );
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test<fnv1a_32, little_endian_flavor>( std::int8_t( -2 ), { 0xFE } );
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test<fnv1a_32, little_endian_flavor>( std::uint8_t( +1 ), { 0x01 } );
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test<fnv1a_32, big_endian_flavor>( std::int8_t( -2 ), { 0xFE } );
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test<fnv1a_32, big_endian_flavor>( std::uint8_t( +1 ), { 0x01 } );
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// 16 bit
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test<fnv1a_32, default_flavor>( std::int16_t( 0 ), { 0x00, 0x00 } );
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test<fnv1a_32, default_flavor>( std::uint16_t( 0 ), { 0x00, 0x00 } );
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test<fnv1a_32, little_endian_flavor>( std::int16_t( -2 ), { 0xFE, 0xFF } );
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test<fnv1a_32, little_endian_flavor>( std::uint16_t( +1 ), { 0x01, 0x00 } );
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test<fnv1a_32, big_endian_flavor>( std::int16_t( -2 ), { 0xFF, 0xFE } );
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test<fnv1a_32, big_endian_flavor>( std::uint16_t( +1 ), { 0x00, 0x01 } );
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// 32 bit
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test<fnv1a_32, default_flavor>( std::int32_t( 0 ), { 0x00, 0x00, 0x00, 0x00 } );
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test<fnv1a_32, default_flavor>( std::uint32_t( 0 ), { 0x00, 0x00, 0x00, 0x00 } );
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test<fnv1a_32, little_endian_flavor>( std::int32_t( -2 ), { 0xFE, 0xFF, 0xFF, 0xFF } );
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test<fnv1a_32, little_endian_flavor>( std::uint32_t( +1 ), { 0x01, 0x00, 0x00, 0x00 } );
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test<fnv1a_32, big_endian_flavor>( std::int32_t( -2 ), { 0xFF, 0xFF, 0xFF, 0xFE } );
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test<fnv1a_32, big_endian_flavor>( std::uint32_t( +1 ), { 0x00, 0x00, 0x00, 0x01 } );
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// 64 bit
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test<fnv1a_32, default_flavor>( std::int64_t( 0 ), { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } );
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test<fnv1a_32, default_flavor>( std::uint64_t( 0 ), { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } );
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test<fnv1a_32, little_endian_flavor>( std::int64_t( -2 ), { 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF } );
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test<fnv1a_32, little_endian_flavor>( std::uint64_t( +1 ), { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } );
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test<fnv1a_32, big_endian_flavor>( std::int64_t( -2 ), { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE } );
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test<fnv1a_32, big_endian_flavor>( std::uint64_t( +1 ), { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 } );
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return boost::report_errors();
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}
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