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// Copyright 2017, 2018, 2024 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/hash2/get_integral_result.hpp>
#include <boost/hash2/fnv1a.hpp>
#include <boost/hash2/hash_append.hpp>
#include <boost/core/lightweight_test.hpp>
#include <set>
#include <limits>
#include <cstdint>
template<class Hash> void test_identity()
{
using boost::hash2::get_integral_result;
using R = typename Hash::result_type;
Hash h;
Hash h2( h );
for( int i = 0; i < 1024; ++i )
{
R r = h.result();
R t = get_integral_result<R>( h2 );
BOOST_TEST_EQ( t, r );
}
}
template<class T, class Hash> void test_sample()
{
using boost::hash2::get_integral_result;
std::set<T> dist;
for( unsigned i = 0; i < 65536; ++i )
{
T t1 = static_cast<T>( i );
Hash h;
boost::hash2::hash_append( h, {}, t1 );
T t2 = get_integral_result<T>( h );
dist.insert( t2 );
}
BOOST_TEST_EQ( dist.size(), 65536u );
}
int main()
{
test_identity< boost::hash2::fnv1a_32 >();
test_identity< boost::hash2::fnv1a_64 >();
test_sample<std::uint32_t, boost::hash2::fnv1a_32>();
test_sample<std::uint32_t, boost::hash2::fnv1a_64>();
test_sample<std::uint64_t, boost::hash2::fnv1a_32>();
test_sample<std::uint64_t, boost::hash2::fnv1a_64>();
return boost::report_errors();
}
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