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Remove detail/reverse.hpp

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This commit is contained in:
Peter Dimov
2024-11-16 03:34:17 +02:00
parent e1b0af7f78
commit 59fb676e40
3 changed files with 0 additions and 146 deletions
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105
include/boost/hash2/detail/reverse.hpp
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@@ -1,105 +0,0 @@
#ifndef BOOST_HASH2_DETAIL_REVERSE_HPP_INCLUDED
#define BOOST_HASH2_DETAIL_REVERSE_HPP_INCLUDED
// Copyright 2024 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <cstdint>
#include <cstring>
#include <cstdlib>
namespace boost
{
namespace hash2
{
namespace detail
{
template<std::size_t N> void reverse( unsigned char (&d)[ N ], void const* s )
{
unsigned char const* s2 = static_cast<unsigned char const*>( s );
for( std::size_t i = 0; i < N; ++i )
{
d[ i ] = s2[ N-1-i ];
}
}
#if defined(__GNUC__) || defined(__clang__)
inline void reverse( unsigned char (&d)[ 2 ], void const* s )
{
std::uint16_t tmp;
std::memcpy( &tmp, s, 2 );
tmp = __builtin_bswap16( tmp );
std::memcpy( d, &tmp, 2 );
}
inline void reverse( unsigned char (&d)[ 4 ], void const* s )
{
std::uint32_t tmp;
std::memcpy( &tmp, s, 4 );
tmp = __builtin_bswap32( tmp );
std::memcpy( d, &tmp, 4 );
}
inline void reverse( unsigned char (&d)[ 8 ], void const* s )
{
std::uint64_t tmp;
std::memcpy( &tmp, s, 8 );
tmp = __builtin_bswap64( tmp );
std::memcpy( d, &tmp, 8 );
}
inline void reverse( unsigned char (&d)[ 16 ], void const* s )
{
std::uint64_t tmp[ 2 ];
std::memcpy( tmp, s, 16 );
std::uint64_t tmp2[ 2 ] = { __builtin_bswap64( tmp[1] ), __builtin_bswap64( tmp[0] ) };
std::memcpy( d, tmp2, 16 );
}
#elif defined(_MSC_VER)
inline void reverse( unsigned char (&d)[ 2 ], void const* s )
{
unsigned short tmp;
std::memcpy( &tmp, s, 2 );
tmp = _byteswap_ushort( tmp );
std::memcpy( d, &tmp, 2 );
}
inline void reverse( unsigned char (&d)[ 4 ], void const* s )
{
unsigned long tmp;
std::memcpy( &tmp, s, 4 );
tmp = _byteswap_ulong( tmp );
std::memcpy( d, &tmp, 4 );
}
inline void reverse( unsigned char (&d)[ 8 ], void const* s )
{
unsigned long long tmp;
std::memcpy( &tmp, s, 8 );
tmp = _byteswap_uint64( tmp );
std::memcpy( d, &tmp, 8 );
}
inline void reverse( unsigned char (&d)[ 16 ], void const* s )
{
unsigned long long tmp[ 2 ];
std::memcpy( tmp, s, 16 );
unsigned long long tmp2[ 2 ] = { _byteswap_uint64( tmp[1] ), _byteswap_uint64( tmp[0] ) };
std::memcpy( d, tmp2, 16 );
}
#endif
} // namespace detail
} // namespace hash2
} // namespace boost
#endif // #ifndef BOOST_HASH2_DETAIL_REVERSE_HPP_INCLUDED

1
test/Jamfile
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@@ -41,7 +41,6 @@ run detail_read.cpp ;
run detail_write.cpp ;
run detail_write_2.cpp ;
run detail_rot.cpp ;
run detail_reverse.cpp ;
run detail_has_tag_invoke.cpp ;
# hash_append

40
test/detail_reverse.cpp
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@@ -1,40 +0,0 @@
// Copyright 2024 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/hash2/detail/reverse.hpp>
#include <boost/core/lightweight_test.hpp>
template<std::size_t N> void test()
{
unsigned char v[ N ] = {};
for( std::size_t i = 0; i < N; ++i ) v[ i ] = static_cast<unsigned char>( i + 1 );
unsigned char w[ N ] = {};
boost::hash2::detail::reverse( w, v );
for( std::size_t i = 0; i < N; ++i ) BOOST_TEST_EQ( w[ i ], v[ N - 1 - i ] );
}
int main()
{
test<1>();
test<2>();
test<3>();
test<4>();
test<5>();
test<6>();
test<7>();
test<8>();
test<9>();
test<10>();
test<11>();
test<12>();
test<13>();
test<14>();
test<15>();
test<16>();
test<17>();
return boost::report_errors();
}