/******************************************************************************** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.**** This file is part of the QtCore module of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 as published by the Free Software Foundation** and appearing in the file LICENSE.GPL included in the packaging of** this file.  Please review the following information to ensure GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#ifndef QENDIAN_H#define QENDIAN_H#include <QtCore/qglobal.h>QT_BEGIN_HEADERQT_MODULE(Core)/* * ENDIAN FUNCTIONS*/inline void qbswap_helper(const uchar *src, uchar *dest, int size){    for (int i = 0; i < size ; ++i) dest[i] = src[size - 1 - i];}/* * qbswap(const T src, const uchar *dest); * Changes the byte order of \a src from big endian to little endian or vice versa * and stores the result in \a dest. * There is no alignment requirements for \a dest.*/template <typename T> inline void qbswap(const T src, uchar *dest){    qbswap_helper(reinterpret_cast<const uchar *>(&src), dest, sizeof(T));}// Used to implement a type-safe and alignment-safe copy operation// If you want to avoid the memcopy, you must write specializations for this functiontemplate <typename T> inline void qToUnaligned(const T src, uchar *dest){    qMemCopy(dest, &src, sizeof(T));}/* T qFromLittleEndian(const uchar *src) * This function will read a little-endian encoded value from \a src * and return the value in host-endian encoding. * There is no requirement that \a src must be aligned.*/#if defined Q_CC_MSVC && _MSC_VER < 1300 || defined Q_CC_SUNinline quint64 qFromLittleEndian_helper(const uchar *src, quint64 *dest){    return 0        | src[0]        | src[1] * Q_UINT64_C(0x0000000000000100)        | src[2] * Q_UINT64_C(0x0000000000010000)        | src[3] * Q_UINT64_C(0x0000000001000000)        | src[4] * Q_UINT64_C(0x0000000100000000)        | src[5] * Q_UINT64_C(0x0000010000000000)        | src[6] * Q_UINT64_C(0x0001000000000000)        | src[7] * Q_UINT64_C(0x0100000000000000);}inline quint32 qFromLittleEndian_helper(const uchar *src, quint32 *dest){    return 0        | src[0]        | src[1] * quint32(0x00000100)        | src[2] * quint32(0x00010000)        | src[3] * quint32(0x01000000);}inline quint16 qFromLittleEndian_helper(const uchar *src, quint16 *dest){    return 0        | src[0]        | src[1] * 0x0100;}inline qint64 qFromLittleEndian_helper(const uchar *src, qint64 * dest){ return static_cast<qint64>(qFromLittleEndian_helper(src, reinterpret_cast<quint64*>(0))); }inline qint32 qFromLittleEndian_helper(const uchar *src, qint32 * dest){ return static_cast<qint32>(qFromLittleEndian_helper(src, reinterpret_cast<quint32*>(0))); }inline qint16 qFromLittleEndian_helper(const uchar *src, qint16 * dest){ return static_cast<qint16>(qFromLittleEndian_helper(src, reinterpret_cast<quint16*>(0))); }template <class T> inline T qFromLittleEndian(const uchar *src){    return qFromLittleEndian_helper(src, reinterpret_cast<T*>(0));}#elsetemplate <typename T> inline T qFromLittleEndian(const uchar *src);template <> inline quint64 qFromLittleEndian<quint64>(const uchar *src){    return 0        | src[0]        | src[1] * Q_UINT64_C(0x0000000000000100)        | src[2] * Q_UINT64_C(0x0000000000010000)        | src[3] * Q_UINT64_C(0x0000000001000000)        | src[4] * Q_UINT64_C(0x0000000100000000)        | src[5] * Q_UINT64_C(0x0000010000000000)        | src[6] * Q_UINT64_C(0x0001000000000000)        | src[7] * Q_UINT64_C(0x0100000000000000);}template <> inline quint32 qFromLittleEndian<quint32>(const uchar *src){    return 0        | src[0]        | src[1] * quint32(0x00000100)        | src[2] * quint32(0x00010000)        | src[3] * quint32(0x01000000);}template <> inline quint16 qFromLittleEndian<quint16>(const uchar *src){    return 0        | src[0]        | src[1] * 0x0100;}// signed specializationstemplate <> inline qint64 qFromLittleEndian<qint64>(const uchar *src){ return static_cast<qint64>(qFromLittleEndian<quint64>(src)); }template <> inline qint32 qFromLittleEndian<qint32>(const uchar *src){ return static_cast<qint32>(qFromLittleEndian<quint32>(src)); }template <> inline qint16 qFromLittleEndian<qint16>(const uchar *src){ return static_cast<qint16>(qFromLittleEndian<quint16>(src)); }#endif/* This function will read a big-endian (also known as network order) encoded value from \a src * and return the value in host-endian encoding. * There is no requirement that \a src must be aligned.*/#if defined Q_CC_MSVC && _MSC_VER < 1300 || defined Q_CC_SUNinline quint64 qFromBigEndian_helper(const uchar *src, quint64 *dest){    return 0        | src[7]        | src[6] * Q_UINT64_C(0x0000000000000100)        | src[5] * Q_UINT64_C(0x0000000000010000)        | src[4] * Q_UINT64_C(0x0000000001000000)        | src[3] * Q_UINT64_C(0x0000000100000000)        | src[2] * Q_UINT64_C(0x0000010000000000)        | src[1] * Q_UINT64_C(0x0001000000000000)        | src[0] * Q_UINT64_C(0x0100000000000000);}inline quint32 qFromBigEndian_helper(const uchar *src, quint32 * dest){    return 0        | src[3]        | src[2] * quint32(0x00000100)        | src[1] * quint32(0x00010000)        | src[0] * quint32(0x01000000);}inline quint16 qFromBigEndian_helper(const uchar *src, quint16 * des){    return 0        | src[1]        | src[0] * 0x0100;}inline qint64 qFromBigEndian_helper(const uchar *src, qint64 * dest){ return static_cast<qint64>(qFromBigEndian_helper(src, reinterpret_cast<quint64*>(0))); }inline qint32 qFromBigEndian_helper(const uchar *src, qint32 * dest){ return static_cast<qint32>(qFromBigEndian_helper(src, reinterpret_cast<quint32*>(0))); }inline qint16 qFromBigEndian_helper(const uchar *src, qint16 * dest){ return static_cast<qint16>(qFromBigEndian_helper(src, reinterpret_cast<quint16*>(0))); }template <class T> inline T qFromBigEndian(const uchar *src){    return qFromBigEndian_helper(src, reinterpret_cast<T*>(0));}#elsetemplate <class T> inline T qFromBigEndian(const uchar *src);template<>inline quint64 qFromBigEndian<quint64>(const uchar *src){    return 0        | src[7]        | src[6] * Q_UINT64_C(0x0000000000000100)        | src[5] * Q_UINT64_C(0x0000000000010000)        | src[4] * Q_UINT64_C(0x0000000001000000)        | src[3] * Q_UINT64_C(0x0000000100000000)        | src[2] * Q_UINT64_C(0x0000010000000000)        | src[1] * Q_UINT64_C(0x0001000000000000)        | src[0] * Q_UINT64_C(0x0100000000000000);}template<>inline quint32 qFromBigEndian<quint32>(const uchar *src){    return 0        | src[3]        | src[2] * quint32(0x00000100)        | src[1] * quint32(0x00010000)        | src[0] * quint32(0x01000000);}template<>inline quint16 qFromBigEndian<quint16>(const uchar *src){    return 0        | src[1]        | src[0] * quint16(0x0100);}// signed specializationstemplate <> inline qint64 qFromBigEndian<qint64>(const uchar *src){ return static_cast<qint64>(qFromBigEndian<quint64>(src)); }template <> inline qint32 qFromBigEndian<qint32>(const uchar *src){ return static_cast<qint32>(qFromBigEndian<quint32>(src)); }template <> inline qint16 qFromBigEndian<qint16>(const uchar *src){ return static_cast<qint16>(qFromBigEndian<quint16>(src)); }#endif/* * T qbswap(T source). * Changes the byte order of a value from big endian to little endian or vice versa. * This function can be used if you are not concerned about alignment issues, * and it is therefore a bit more convenient and in most cases more efficient.*/template <typename T> T qbswap(T source);template <> inline quint64 qbswap<quint64>(quint64 source){    return 0        | ((source & Q_UINT64_C(0x00000000000000ff)) << 56)        | ((source & Q_UINT64_C(0x000000000000ff00)) << 40)        | ((source & Q_UINT64_C(0x0000000000ff0000)) << 24)        | ((source & Q_UINT64_C(0x00000000ff000000)) << 8)        | ((source & Q_UINT64_C(0x000000ff00000000)) >> 8)        | ((source & Q_UINT64_C(0x0000ff0000000000)) >> 24)        | ((source & Q_UINT64_C(0x00ff000000000000)) >> 40)        | ((source & Q_UINT64_C(0xff00000000000000)) >> 56);}template <> inline quint32 qbswap<quint32>(quint32 source){    return 0        | ((source & 0x000000ff) << 24)        | ((source & 0x0000ff00) << 8)        | ((source & 0x00ff0000) >> 8)        | ((source & 0xff000000) >> 24);}template <> inline quint16 qbswap<quint16>(quint16 source){    return 0        | ((source & 0x00ff) << 8)        | ((source & 0xff00) >> 8);}// signed specializationstemplate <> inline qint64 qbswap<qint64>(qint64 source){    return qbswap<quint64>(quint64(source));}template <> inline qint32 qbswap<qint32>(qint32 source){    return qbswap<quint32>(quint32(source));}template <> inline qint16 qbswap<qint16>(qint16 source){    return qbswap<quint16>(quint16(source));}#if Q_BYTE_ORDER == Q_BIG_ENDIANtemplate <typename T> inline T qToBigEndian(T source){ return source; }template <typename T> inline T qFromBigEndian(T source){ return source; }template <typename T> inline T qToLittleEndian(T source){ return qbswap<T>(source); }template <typename T> inline T qFromLittleEndian(T source){ return qbswap<T>(source); }template <typename T> inline void qToBigEndian(T src, uchar *dest){ qToUnaligned<T>(src, dest); }template <typename T> inline void qToLittleEndian(T src, uchar *dest){ qbswap<T>(src, dest); }#else // Q_LITTLE_ENDIANtemplate <typename T> inline T qToBigEndian(T source){ return qbswap<T>(source); }template <typename T> inline T qFromBigEndian(T source){ return qbswap<T>(source); }template <typename T> inline T qToLittleEndian(T source){ return source; }template <typename T> inline T qFromLittleEndian(T source){ return source; }template <typename T> inline void qToBigEndian(T src, uchar *dest){ qbswap<T>(src, dest); }template <typename T> inline void qToLittleEndian(T src, uchar *dest){ qToUnaligned<T>(src, dest); }#endif // Q_BYTE_ORDER == Q_BIG_ENDIANQT_END_HEADER#endif // QENDIAN_H