feedc0de/boost_container_hash
1
0
Fork 0
forked from boostorg/container_hash
Code Pull Requests Activity

Update 128 bit long double hash_value

Browse Source
This commit is contained in:
Peter Dimov
2022-09-20 14:49:37 +03:00
parent 75ef5a14f5
commit 034b81594d
2 changed files with 10 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/boost/container_hash/hash.hpp
+3 -21
View File
@@ -289,7 +289,7 @@ namespace boost
};
// 128 bit long double
template<class T, int Digits> struct hash_float_impl<T, 128, Digits, 64>
template<class T, int Digits, std::size_t size_t_bits> struct hash_float_impl<T, 128, Digits, size_t_bits>
{
static std::size_t fn( T v )
{
@@ -298,26 +298,8 @@ namespace boost
std::size_t seed = 0;
seed = static_cast<std::size_t>( w[0] ) + hash_detail::hash_mix( seed );
seed = static_cast<std::size_t>( w[1] ) + hash_detail::hash_mix( seed );
return seed;
}
};
template<class T, int Digits> struct hash_float_impl<T, 128, Digits, 32>
{
static std::size_t fn( T v )
{
boost::uint32_t w[ 4 ];
std::memcpy( &w, &v, sizeof( v ) );
std::size_t seed = 0;
seed = static_cast<std::size_t>( w[0] ) + hash_detail::hash_mix( seed );
seed = static_cast<std::size_t>( w[1] ) + hash_detail::hash_mix( seed );
seed = static_cast<std::size_t>( w[2] ) + hash_detail::hash_mix( seed );
seed = static_cast<std::size_t>( w[3] ) + hash_detail::hash_mix( seed );
seed = hash_value( w[0] ) + hash_detail::hash_mix( seed );
seed = hash_value( w[1] ) + hash_detail::hash_mix( seed );
return seed;
}