/usr/include/boost/endian
Edit: /usr/include/boost/endian/buffers.hpp (13904B)
// 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
#include
#include
#include
#include
#include
#include
#include
#include
#include
#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
class endian_buffer;
// aligned big endian signed integer buffers
typedef endian_buffer big_int8_buf_at;
typedef endian_buffer big_int16_buf_at;
typedef endian_buffer big_int32_buf_at;
typedef endian_buffer big_int64_buf_at;
// aligned big endian unsigned integer buffers
typedef endian_buffer big_uint8_buf_at;
typedef endian_buffer big_uint16_buf_at;
typedef endian_buffer big_uint32_buf_at;
typedef endian_buffer big_uint64_buf_at;
// aligned little endian signed integer buffers
typedef endian_buffer little_int8_buf_at;
typedef endian_buffer little_int16_buf_at;
typedef endian_buffer little_int32_buf_at;
typedef endian_buffer little_int64_buf_at;
// aligned little endian unsigned integer buffers
typedef endian_buffer little_uint8_buf_at;
typedef endian_buffer little_uint16_buf_at;
typedef endian_buffer little_uint32_buf_at;
typedef endian_buffer little_uint64_buf_at;
// aligned floating point buffers
typedef endian_buffer big_float32_buf_at;
typedef endian_buffer big_float64_buf_at;
typedef endian_buffer little_float32_buf_at;
typedef endian_buffer little_float64_buf_at;
// aligned native endian typedefs are not provided because
// types are superior for this use case
// unaligned big endian signed integer buffers
typedef endian_buffer big_int8_buf_t;
typedef endian_buffer big_int16_buf_t;
typedef endian_buffer big_int24_buf_t;
typedef endian_buffer big_int32_buf_t;
typedef endian_buffer big_int40_buf_t;
typedef endian_buffer big_int48_buf_t;
typedef endian_buffer big_int56_buf_t;
typedef endian_buffer big_int64_buf_t;
// unaligned big endian unsigned integer buffers
typedef endian_buffer big_uint8_buf_t;
typedef endian_buffer big_uint16_buf_t;
typedef endian_buffer big_uint24_buf_t;
typedef endian_buffer big_uint32_buf_t;
typedef endian_buffer big_uint40_buf_t;
typedef endian_buffer big_uint48_buf_t;
typedef endian_buffer big_uint56_buf_t;
typedef endian_buffer big_uint64_buf_t;
// unaligned little endian signed integer buffers
typedef endian_buffer little_int8_buf_t;
typedef endian_buffer little_int16_buf_t;
typedef endian_buffer little_int24_buf_t;
typedef endian_buffer little_int32_buf_t;
typedef endian_buffer little_int40_buf_t;
typedef endian_buffer little_int48_buf_t;
typedef endian_buffer little_int56_buf_t;
typedef endian_buffer little_int64_buf_t;
// unaligned little endian unsigned integer buffers
typedef endian_buffer little_uint8_buf_t;
typedef endian_buffer little_uint16_buf_t;
typedef endian_buffer little_uint24_buf_t;
typedef endian_buffer little_uint32_buf_t;
typedef endian_buffer little_uint40_buf_t;
typedef endian_buffer little_uint48_buf_t;
typedef endian_buffer little_uint56_buf_t;
typedef endian_buffer little_uint64_buf_t;
// unaligned native endian signed integer buffers
typedef endian_buffer native_int8_buf_t;
typedef endian_buffer native_int16_buf_t;
typedef endian_buffer native_int24_buf_t;
typedef endian_buffer native_int32_buf_t;
typedef endian_buffer native_int40_buf_t;
typedef endian_buffer native_int48_buf_t;
typedef endian_buffer native_int56_buf_t;
typedef endian_buffer native_int64_buf_t;
// unaligned native endian unsigned integer buffers
typedef endian_buffer native_uint8_buf_t;
typedef endian_buffer native_uint16_buf_t;
typedef endian_buffer native_uint24_buf_t;
typedef endian_buffer native_uint32_buf_t;
typedef endian_buffer native_uint40_buf_t;
typedef endian_buffer native_uint48_buf_t;
typedef endian_buffer native_uint56_buf_t;
typedef endian_buffer native_uint64_buf_t;
// unaligned floating point buffers
typedef endian_buffer big_float32_buf_t;
typedef endian_buffer big_float64_buf_t;
typedef endian_buffer little_float32_buf_t;
typedef endian_buffer little_float64_buf_t;
typedef endian_buffer native_float32_buf_t;
typedef endian_buffer native_float64_buf_t;
// Stream inserter
template
std::basic_ostream&
operator<<(std::basic_ostream& os,
const endian_buffer& x)
{
return os << x.value();
}
// Stream extractor
template
std::basic_istream&
operator>>(std::basic_istream& is,
endian_buffer& 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
{
private:
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( value_, val );
}
#endif
endian_buffer& operator=( T val ) BOOST_NOEXCEPT
{
boost::endian::endian_store( value_, val );
return *this;
}
value_type value() const BOOST_NOEXCEPT
{
return boost::endian::endian_load( 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
{
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( value_, val );
}
#endif
endian_buffer& operator=( T val ) BOOST_NOEXCEPT
{
boost::endian::endian_store( value_, val );
return *this;
}
value_type value() const BOOST_NOEXCEPT
{
return boost::endian::endian_load( 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
{
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