suyu/externals/vcpkg/packages/boost-endian_x64-windows/include/boost/endian/buffers.hpp

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// boost/endian/buffers.hpp ----------------------------------------------------------//
// (C) Copyright Darin Adler 2000
// (C) Copyright Beman Dawes 2006, 2009, 2014
// (C) Copyright Peter Dimov 2019
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
// See library home page at http://www.boost.org/libs/endian
//--------------------------------------------------------------------------------------//
// Original design developed by Darin Adler based on classes developed by Mark
// Borgerding. Four original class templates were combined into a single endian
// class template by Beman Dawes, who also added the unrolled_byte_loops sign
// partial specialization to correctly extend the sign when cover integer size
// differs from endian representation size.
// TODO: When a compiler supporting constexpr becomes available, try possible uses.
#ifndef BOOST_ENDIAN_BUFFERS_HPP
#define BOOST_ENDIAN_BUFFERS_HPP
#if defined(_MSC_VER)
# pragma warning(push)
# pragma warning(disable: 4127) // conditional expression is constant
#endif
#include <boost/endian/detail/endian_store.hpp>
#include <boost/endian/detail/endian_load.hpp>
#include <boost/core/scoped_enum.hpp>
#include <boost/static_assert.hpp>
#include <boost/cstdint.hpp>
#include <boost/config.hpp>
#include <boost/config/workaround.hpp>
#include <iosfwd>
#include <climits>
#include <cstring>
#if defined(BOOST_BORLANDC) || defined(BOOST_CODEGEARC)
# pragma pack(push, 1)
#endif
# if CHAR_BIT != 8
# error Platforms with CHAR_BIT != 8 are not supported
# endif
# ifdef BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
# define BOOST_ENDIAN_DEFAULT_CONSTRUCT {} // C++03
# else
# define BOOST_ENDIAN_DEFAULT_CONSTRUCT = default; // C++0x
# endif
// g++ pre-4.6 does not support unrestricted unions, but we have no Config macro for that
# if (defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || BOOST_WORKAROUND(BOOST_GCC, < 40600)) && defined(BOOST_ENDIAN_FORCE_PODNESS)
# define BOOST_ENDIAN_NO_CTORS
# endif
//---------------------------------- synopsis ----------------------------------------//
namespace boost
{
namespace endian
{
BOOST_SCOPED_ENUM_START(align)
{no, yes
# ifdef BOOST_ENDIAN_DEPRECATED_NAMES
, unaligned = no, aligned = yes
# endif
}; BOOST_SCOPED_ENUM_END
template <BOOST_SCOPED_ENUM(order) Order, class T, std::size_t n_bits,
BOOST_SCOPED_ENUM(align) A = align::no>
class endian_buffer;
// aligned big endian signed integer buffers
typedef endian_buffer<order::big, int8_t, 8, align::yes> big_int8_buf_at;
typedef endian_buffer<order::big, int16_t, 16, align::yes> big_int16_buf_at;
typedef endian_buffer<order::big, int32_t, 32, align::yes> big_int32_buf_at;
typedef endian_buffer<order::big, int64_t, 64, align::yes> big_int64_buf_at;
// aligned big endian unsigned integer buffers
typedef endian_buffer<order::big, uint8_t, 8, align::yes> big_uint8_buf_at;
typedef endian_buffer<order::big, uint16_t, 16, align::yes> big_uint16_buf_at;
typedef endian_buffer<order::big, uint32_t, 32, align::yes> big_uint32_buf_at;
typedef endian_buffer<order::big, uint64_t, 64, align::yes> big_uint64_buf_at;
// aligned little endian signed integer buffers
typedef endian_buffer<order::little, int8_t, 8, align::yes> little_int8_buf_at;
typedef endian_buffer<order::little, int16_t, 16, align::yes> little_int16_buf_at;
typedef endian_buffer<order::little, int32_t, 32, align::yes> little_int32_buf_at;
typedef endian_buffer<order::little, int64_t, 64, align::yes> little_int64_buf_at;
// aligned little endian unsigned integer buffers
typedef endian_buffer<order::little, uint8_t, 8, align::yes> little_uint8_buf_at;
typedef endian_buffer<order::little, uint16_t, 16, align::yes> little_uint16_buf_at;
typedef endian_buffer<order::little, uint32_t, 32, align::yes> little_uint32_buf_at;
typedef endian_buffer<order::little, uint64_t, 64, align::yes> little_uint64_buf_at;
// aligned floating point buffers
typedef endian_buffer<order::big, float, 32, align::yes> big_float32_buf_at;
typedef endian_buffer<order::big, double, 64, align::yes> big_float64_buf_at;
typedef endian_buffer<order::little, float, 32, align::yes> little_float32_buf_at;
typedef endian_buffer<order::little, double, 64, align::yes> little_float64_buf_at;
// aligned native endian typedefs are not provided because
// <cstdint> types are superior for this use case
// unaligned big endian signed integer buffers
typedef endian_buffer<order::big, int_least8_t, 8> big_int8_buf_t;
typedef endian_buffer<order::big, int_least16_t, 16> big_int16_buf_t;
typedef endian_buffer<order::big, int_least32_t, 24> big_int24_buf_t;
typedef endian_buffer<order::big, int_least32_t, 32> big_int32_buf_t;
typedef endian_buffer<order::big, int_least64_t, 40> big_int40_buf_t;
typedef endian_buffer<order::big, int_least64_t, 48> big_int48_buf_t;
typedef endian_buffer<order::big, int_least64_t, 56> big_int56_buf_t;
typedef endian_buffer<order::big, int_least64_t, 64> big_int64_buf_t;
// unaligned big endian unsigned integer buffers
typedef endian_buffer<order::big, uint_least8_t, 8> big_uint8_buf_t;
typedef endian_buffer<order::big, uint_least16_t, 16> big_uint16_buf_t;
typedef endian_buffer<order::big, uint_least32_t, 24> big_uint24_buf_t;
typedef endian_buffer<order::big, uint_least32_t, 32> big_uint32_buf_t;
typedef endian_buffer<order::big, uint_least64_t, 40> big_uint40_buf_t;
typedef endian_buffer<order::big, uint_least64_t, 48> big_uint48_buf_t;
typedef endian_buffer<order::big, uint_least64_t, 56> big_uint56_buf_t;
typedef endian_buffer<order::big, uint_least64_t, 64> big_uint64_buf_t;
// unaligned little endian signed integer buffers
typedef endian_buffer<order::little, int_least8_t, 8> little_int8_buf_t;
typedef endian_buffer<order::little, int_least16_t, 16> little_int16_buf_t;
typedef endian_buffer<order::little, int_least32_t, 24> little_int24_buf_t;
typedef endian_buffer<order::little, int_least32_t, 32> little_int32_buf_t;
typedef endian_buffer<order::little, int_least64_t, 40> little_int40_buf_t;
typedef endian_buffer<order::little, int_least64_t, 48> little_int48_buf_t;
typedef endian_buffer<order::little, int_least64_t, 56> little_int56_buf_t;
typedef endian_buffer<order::little, int_least64_t, 64> little_int64_buf_t;
// unaligned little endian unsigned integer buffers
typedef endian_buffer<order::little, uint_least8_t, 8> little_uint8_buf_t;
typedef endian_buffer<order::little, uint_least16_t, 16> little_uint16_buf_t;
typedef endian_buffer<order::little, uint_least32_t, 24> little_uint24_buf_t;
typedef endian_buffer<order::little, uint_least32_t, 32> little_uint32_buf_t;
typedef endian_buffer<order::little, uint_least64_t, 40> little_uint40_buf_t;
typedef endian_buffer<order::little, uint_least64_t, 48> little_uint48_buf_t;
typedef endian_buffer<order::little, uint_least64_t, 56> little_uint56_buf_t;
typedef endian_buffer<order::little, uint_least64_t, 64> little_uint64_buf_t;
// unaligned native endian signed integer buffers
typedef endian_buffer<order::native, int_least8_t, 8> native_int8_buf_t;
typedef endian_buffer<order::native, int_least16_t, 16> native_int16_buf_t;
typedef endian_buffer<order::native, int_least32_t, 24> native_int24_buf_t;
typedef endian_buffer<order::native, int_least32_t, 32> native_int32_buf_t;
typedef endian_buffer<order::native, int_least64_t, 40> native_int40_buf_t;
typedef endian_buffer<order::native, int_least64_t, 48> native_int48_buf_t;
typedef endian_buffer<order::native, int_least64_t, 56> native_int56_buf_t;
typedef endian_buffer<order::native, int_least64_t, 64> native_int64_buf_t;
// unaligned native endian unsigned integer buffers
typedef endian_buffer<order::native, uint_least8_t, 8> native_uint8_buf_t;
typedef endian_buffer<order::native, uint_least16_t, 16> native_uint16_buf_t;
typedef endian_buffer<order::native, uint_least32_t, 24> native_uint24_buf_t;
typedef endian_buffer<order::native, uint_least32_t, 32> native_uint32_buf_t;
typedef endian_buffer<order::native, uint_least64_t, 40> native_uint40_buf_t;
typedef endian_buffer<order::native, uint_least64_t, 48> native_uint48_buf_t;
typedef endian_buffer<order::native, uint_least64_t, 56> native_uint56_buf_t;
typedef endian_buffer<order::native, uint_least64_t, 64> native_uint64_buf_t;
// unaligned floating point buffers
typedef endian_buffer<order::big, float, 32, align::no> big_float32_buf_t;
typedef endian_buffer<order::big, double, 64, align::no> big_float64_buf_t;
typedef endian_buffer<order::little, float, 32, align::no> little_float32_buf_t;
typedef endian_buffer<order::little, double, 64, align::no> little_float64_buf_t;
typedef endian_buffer<order::native, float, 32, align::no> native_float32_buf_t;
typedef endian_buffer<order::native, double, 64, align::no> native_float64_buf_t;
// Stream inserter
template <class charT, class traits, BOOST_SCOPED_ENUM(order) Order, class T,
std::size_t n_bits, BOOST_SCOPED_ENUM(align) A>
std::basic_ostream<charT, traits>&
operator<<(std::basic_ostream<charT, traits>& os,
const endian_buffer<Order, T, n_bits, A>& x)
{
return os << x.value();
}
// Stream extractor
template <class charT, class traits, BOOST_SCOPED_ENUM(order) Order, class T,
std::size_t n_bits, BOOST_SCOPED_ENUM(align) A>
std::basic_istream<charT, traits>&
operator>>(std::basic_istream<charT, traits>& is,
endian_buffer<Order, T, n_bits, A>& x)
{
T i;
if (is >> i)
x = i;
return is;
}
//---------------------------------- end synopsis ------------------------------------//
// endian_buffer class template specializations --------------------------------------//
// Specializations that represent unaligned bytes.
// Taking an integer type as a parameter provides a nice way to pass both
// the size and signedness of the desired integer and get the appropriate
// corresponding integer type for the interface.
// Q: Should endian_buffer supply "value_type operator value_type() const noexcept"?
// A: No. The rationale for endian_buffers is to prevent high-cost hidden
// conversions. If an implicit conversion operator is supplied, hidden conversions
// can occur.
// unaligned endian_buffer specialization
template< BOOST_SCOPED_ENUM(order) Order, class T, std::size_t n_bits >
class endian_buffer<Order, T, n_bits, align::no>
{
#ifdef BOOST_ENDIAN_NO_CTORS
public:
#endif
BOOST_STATIC_ASSERT( (n_bits/8)*8 == n_bits );
unsigned char value_[ n_bits / 8 ];
public:
typedef T value_type;
#ifndef BOOST_ENDIAN_NO_CTORS
endian_buffer() BOOST_ENDIAN_DEFAULT_CONSTRUCT
explicit endian_buffer( T val ) BOOST_NOEXCEPT
{
boost::endian::endian_store<T, n_bits / 8, Order>( value_, val );
}
#endif
endian_buffer& operator=( T val ) BOOST_NOEXCEPT
{
boost::endian::endian_store<T, n_bits / 8, Order>( value_, val );
return *this;
}
value_type value() const BOOST_NOEXCEPT
{
return boost::endian::endian_load<T, n_bits / 8, Order>( value_ );
}
unsigned char const * data() const BOOST_NOEXCEPT
{
return value_;
}
unsigned char * data() BOOST_NOEXCEPT
{
return value_;
}
};
// aligned specializations; only n_bits == 16/32/64 supported
// aligned endian_buffer specialization
template< BOOST_SCOPED_ENUM(order) Order, class T, std::size_t n_bits >
class endian_buffer<Order, T, n_bits, align::yes>
{
private:
BOOST_STATIC_ASSERT( (n_bits/8)*8 == n_bits );
BOOST_STATIC_ASSERT( sizeof(T) == n_bits/8 );
union
{
unsigned char value_[ n_bits / 8 ];
T align_;
};
public:
typedef T value_type;
#ifndef BOOST_ENDIAN_NO_CTORS
endian_buffer() BOOST_ENDIAN_DEFAULT_CONSTRUCT
explicit endian_buffer( T val ) BOOST_NOEXCEPT
{
boost::endian::endian_store<T, n_bits / 8, Order>( value_, val );
}
#endif
endian_buffer& operator=( T val ) BOOST_NOEXCEPT
{
boost::endian::endian_store<T, n_bits / 8, Order>( value_, val );
return *this;
}
value_type value() const BOOST_NOEXCEPT
{
return boost::endian::endian_load<T, n_bits / 8, Order>( value_ );
}
unsigned char const * data() const BOOST_NOEXCEPT
{
return value_;
}
unsigned char * data() BOOST_NOEXCEPT
{
return value_;
}
};
// aligned native endian_buffer specialization
template< class T, std::size_t n_bits >
class endian_buffer<order::native, T, n_bits, align::yes>
{
private:
BOOST_STATIC_ASSERT( (n_bits/8)*8 == n_bits );
BOOST_STATIC_ASSERT( sizeof(T) == n_bits/8 );
T value_;
public:
typedef T value_type;
#ifndef BOOST_ENDIAN_NO_CTORS
endian_buffer() BOOST_ENDIAN_DEFAULT_CONSTRUCT
explicit endian_buffer( T val ) BOOST_NOEXCEPT: value_( val )
{
}
#endif
endian_buffer& operator=( T val ) BOOST_NOEXCEPT
{
value_ = val;
return *this;
}
value_type value() const BOOST_NOEXCEPT
{
return value_;
}
unsigned char const * data() const BOOST_NOEXCEPT
{
return reinterpret_cast< unsigned char const* >( &value_ );
}
unsigned char * data() BOOST_NOEXCEPT
{
return reinterpret_cast< unsigned char* >( &value_ );
}
};
} // namespace endian
} // namespace boost
#if defined(BOOST_BORLANDC) || defined(BOOST_CODEGEARC)
# pragma pack(pop)
#endif
#if defined(_MSC_VER)
# pragma warning(pop)
#endif
#endif // BOOST_ENDIAN_BUFFERS_HPP