mirror of
https://github.com/VCMP-SqMod/SqMod.git
synced 2024-11-14 19:57:17 +01:00
269 lines
6.8 KiB
C
269 lines
6.8 KiB
C
|
//
|
||
|
|
// ByteOrder.h
|
||
|
|
//
|
||
|
|
// Library: Foundation
|
||
|
|
// Package: Core
|
||
|
|
// Module: ByteOrder
|
||
|
|
//
|
||
|
|
// Copyright (c) 2004-2014, Applied Informatics Software Engineering GmbH.
|
||
|
|
// and Contributors.
|
||
|
|
//
|
||
|
|
// SPDX-License-Identifier: BSL-1.0
|
||
|
|
//
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef Foundation_ByteOrder_INCLUDED
|
||
|
|
#define Foundation_ByteOrder_INCLUDED
|
||
|
|
|
||
|
|
|
||
|
|
#include "Poco/Foundation.h"
|
||
|
|
#include "Poco/Types.h"
|
||
|
|
#if defined(_MSC_VER)
|
||
|
|
#include <stdlib.h> // builtins
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
namespace Poco {
|
||
|
|
|
||
|
|
|
||
|
|
class Foundation_API ByteOrder
|
||
|
|
/// This class contains a number of static methods
|
||
|
|
/// to convert between big-endian and little-endian
|
||
|
|
/// integers of various sizes.
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
static Int16 flipBytes(Int16 value);
|
||
|
|
static UInt16 flipBytes(UInt16 value);
|
||
|
|
static Int32 flipBytes(Int32 value);
|
||
|
|
static UInt32 flipBytes(UInt32 value);
|
||
|
|
static float flipBytes(float value);
|
||
|
|
static double flipBytes(double value);
|
||
|
|
#if defined(POCO_HAVE_INT64)
|
||
|
|
static Int64 flipBytes(Int64 value);
|
||
|
|
static UInt64 flipBytes(UInt64 value);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static Int16 toBigEndian(Int16 value);
|
||
|
|
static UInt16 toBigEndian (UInt16 value);
|
||
|
|
static Int32 toBigEndian(Int32 value);
|
||
|
|
static UInt32 toBigEndian (UInt32 value);
|
||
|
|
#if defined(POCO_HAVE_INT64)
|
||
|
|
static Int64 toBigEndian(Int64 value);
|
||
|
|
static UInt64 toBigEndian (UInt64 value);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static Int16 fromBigEndian(Int16 value);
|
||
|
|
static UInt16 fromBigEndian (UInt16 value);
|
||
|
|
static Int32 fromBigEndian(Int32 value);
|
||
|
|
static UInt32 fromBigEndian (UInt32 value);
|
||
|
|
#if defined(POCO_HAVE_INT64)
|
||
|
|
static Int64 fromBigEndian(Int64 value);
|
||
|
|
static UInt64 fromBigEndian (UInt64 value);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static Int16 toLittleEndian(Int16 value);
|
||
|
|
static UInt16 toLittleEndian (UInt16 value);
|
||
|
|
static Int32 toLittleEndian(Int32 value);
|
||
|
|
static UInt32 toLittleEndian (UInt32 value);
|
||
|
|
#if defined(POCO_HAVE_INT64)
|
||
|
|
static Int64 toLittleEndian(Int64 value);
|
||
|
|
static UInt64 toLittleEndian (UInt64 value);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static Int16 fromLittleEndian(Int16 value);
|
||
|
|
static UInt16 fromLittleEndian (UInt16 value);
|
||
|
|
static Int32 fromLittleEndian(Int32 value);
|
||
|
|
static UInt32 fromLittleEndian (UInt32 value);
|
||
|
|
#if defined(POCO_HAVE_INT64)
|
||
|
|
static Int64 fromLittleEndian(Int64 value);
|
||
|
|
static UInt64 fromLittleEndian (UInt64 value);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static Int16 toNetwork(Int16 value);
|
||
|
|
static UInt16 toNetwork (UInt16 value);
|
||
|
|
static Int32 toNetwork(Int32 value);
|
||
|
|
static UInt32 toNetwork (UInt32 value);
|
||
|
|
#if defined(POCO_HAVE_INT64)
|
||
|
|
static Int64 toNetwork(Int64 value);
|
||
|
|
static UInt64 toNetwork (UInt64 value);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static Int16 fromNetwork(Int16 value);
|
||
|
|
static UInt16 fromNetwork (UInt16 value);
|
||
|
|
static Int32 fromNetwork(Int32 value);
|
||
|
|
static UInt32 fromNetwork (UInt32 value);
|
||
|
|
#if defined(POCO_HAVE_INT64)
|
||
|
|
static Int64 fromNetwork(Int64 value);
|
||
|
|
static UInt64 fromNetwork (UInt64 value);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
private:
|
||
|
|
template<typename T>
|
||
|
|
static T flip(T value)
|
||
|
|
{
|
||
|
|
T flip = value;
|
||
|
|
std::size_t halfSize = sizeof(T) / 2;
|
||
|
|
char* flipP = reinterpret_cast<char*>(&flip);
|
||
|
|
|
||
|
|
for (std::size_t i = 0; i < halfSize; i++)
|
||
|
|
{
|
||
|
|
std::swap(flipP[i], flipP[sizeof(T) - i - 1]);
|
||
|
|
}
|
||
|
|
return flip;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
#if !defined(POCO_NO_BYTESWAP_BUILTINS)
|
||
|
|
#if defined(_MSC_VER)
|
||
|
|
#if (POCO_MSVC_VERSION > 71)
|
||
|
|
#define POCO_HAVE_MSC_BYTESWAP 1
|
||
|
|
#endif
|
||
|
|
#elif defined(__clang__)
|
||
|
|
#if __has_builtin(__builtin_bswap32)
|
||
|
|
#define POCO_HAVE_GCC_BYTESWAP 1
|
||
|
|
#endif
|
||
|
|
#elif defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
|
||
|
|
#define POCO_HAVE_GCC_BYTESWAP 1
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// inlines
|
||
|
|
//
|
||
|
|
inline UInt16 ByteOrder::flipBytes(UInt16 value)
|
||
|
|
{
|
||
|
|
#if defined(POCO_HAVE_MSC_BYTESWAP)
|
||
|
|
return _byteswap_ushort(value);
|
||
|
|
#else
|
||
|
|
return ((value >> 8) & 0x00FF) | ((value << 8) & 0xFF00);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
inline Int16 ByteOrder::flipBytes(Int16 value)
|
||
|
|
{
|
||
|
|
return Int16(flipBytes(UInt16(value)));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
inline UInt32 ByteOrder::flipBytes(UInt32 value)
|
||
|
|
{
|
||
|
|
#if defined(POCO_HAVE_MSC_BYTESWAP)
|
||
|
|
return _byteswap_ulong(value);
|
||
|
|
#elif defined(POCO_HAVE_GCC_BYTESWAP)
|
||
|
|
return __builtin_bswap32(value);
|
||
|
|
#else
|
||
|
|
return ((value >> 24) & 0x000000FF) | ((value >> 8) & 0x0000FF00)
|
||
|
|
| ((value << 8) & 0x00FF0000) | ((value << 24) & 0xFF000000);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
inline Int32 ByteOrder::flipBytes(Int32 value)
|
||
|
|
{
|
||
|
|
return Int32(flipBytes(UInt32(value)));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
inline float ByteOrder::flipBytes(float value)
|
||
|
|
{
|
||
|
|
return flip(value);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
inline double ByteOrder::flipBytes(double value)
|
||
|
|
{
|
||
|
|
return flip(value);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#if defined(POCO_HAVE_INT64)
|
||
|
|
inline UInt64 ByteOrder::flipBytes(UInt64 value)
|
||
|
|
{
|
||
|
|
#if defined(POCO_HAVE_MSC_BYTESWAP)
|
||
|
|
return _byteswap_uint64(value);
|
||
|
|
#elif defined(POCO_HAVE_GCC_BYTESWAP)
|
||
|
|
return __builtin_bswap64(value);
|
||
|
|
#else
|
||
|
|
UInt32 hi = UInt32(value >> 32);
|
||
|
|
UInt32 lo = UInt32(value & 0xFFFFFFFF);
|
||
|
|
return UInt64(flipBytes(hi)) | (UInt64(flipBytes(lo)) << 32);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
inline Int64 ByteOrder::flipBytes(Int64 value)
|
||
|
|
{
|
||
|
|
return Int64(flipBytes(UInt64(value)));
|
||
|
|
}
|
||
|
|
#endif // POCO_HAVE_INT64
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// some macro trickery to automate the method implementation
|
||
|
|
//
|
||
|
|
#define POCO_IMPLEMENT_BYTEORDER_NOOP_(op, type) \
|
||
|
|
inline type ByteOrder::op(type value) \
|
||
|
|
{ \
|
||
|
|
return value; \
|
||
|
|
}
|
||
|
|
#define POCO_IMPLEMENT_BYTEORDER_FLIP_(op, type) \
|
||
|
|
inline type ByteOrder::op(type value) \
|
||
|
|
{ \
|
||
|
|
return flipBytes(value); \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#if defined(POCO_HAVE_INT64)
|
||
|
|
#define POCO_IMPLEMENT_BYTEORDER_NOOP(op) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_NOOP_(op, Int16) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_NOOP_(op, UInt16) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_NOOP_(op, Int32) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_NOOP_(op, UInt32) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_NOOP_(op, Int64) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_NOOP_(op, UInt64)
|
||
|
|
#define POCO_IMPLEMENT_BYTEORDER_FLIP(op) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_FLIP_(op, Int16) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_FLIP_(op, UInt16) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_FLIP_(op, Int32) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_FLIP_(op, UInt32) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_FLIP_(op, Int64) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_FLIP_(op, UInt64)
|
||
|
|
#else
|
||
|
|
#define POCO_IMPLEMENT_BYTEORDER_NOOP(op) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_NOOP_(op, Int16) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_NOOP_(op, UInt16) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_NOOP_(op, Int32) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_NOOP_(op, UInt32)
|
||
|
|
#define POCO_IMPLEMENT_BYTEORDER_FLIP(op) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_FLIP_(op, Int16) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_FLIP_(op, UInt16) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_FLIP_(op, Int32) \
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_FLIP_(op, UInt32)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#if defined(POCO_ARCH_BIG_ENDIAN)
|
||
|
|
#define POCO_IMPLEMENT_BYTEORDER_BIG POCO_IMPLEMENT_BYTEORDER_NOOP
|
||
|
|
#define POCO_IMPLEMENT_BYTEORDER_LIT POCO_IMPLEMENT_BYTEORDER_FLIP
|
||
|
|
#else
|
||
|
|
#define POCO_IMPLEMENT_BYTEORDER_BIG POCO_IMPLEMENT_BYTEORDER_FLIP
|
||
|
|
#define POCO_IMPLEMENT_BYTEORDER_LIT POCO_IMPLEMENT_BYTEORDER_NOOP
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_BIG(toBigEndian)
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_BIG(fromBigEndian)
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_BIG(toNetwork)
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_BIG(fromNetwork)
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_LIT(toLittleEndian)
|
||
|
|
POCO_IMPLEMENT_BYTEORDER_LIT(fromLittleEndian)
|
||
|
|
|
||
|
|
|
||
|
|
} // namespace Poco
|
||
|
|
|
||
|
|
|
||
|
|
#endif // Foundation_ByteOrder_INCLUDED
|