src/corelib/global/qendian.qdoc
author eckhart.koppen@nokia.com
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the documentation of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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/*!
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    \headerfile <QtEndian>
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    \title Endian Conversion Functions
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    \ingroup funclists
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    \brief The <QtEndian> header provides functions to convert between
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    little and big endian representations of numbers.
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*/
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/*!
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    \fn T qFromBigEndian(const uchar *src)
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    \since 4.3
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    \relates <QtEndian>
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    Reads a big-endian number from memory location \a src and returns the number in the
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    host byte order representation.
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    On CPU architectures where the host byte order is little-endian (such as x86) this
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    will swap the byte order; otherwise it will just read from \a src.
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    \note Template type \c{T} can either be a qint16, qint32 or qint64. Other types of
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    integers, e.g., qlong, are not applicable.
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    There are no data alignment constraints for \a src.
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    \sa qFromLittleEndian()
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    \sa qToBigEndian()
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    \sa qToLittleEndian()
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*/
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/*!
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    \fn T qFromBigEndian(T src)
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    \since 4.3
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    \relates <QtEndian>
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    \overload
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    Converts \a src from big-endian byte order and returns the number in host byte order
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    representation of that number.
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    On CPU architectures where the host byte order is little-endian (such as x86) this
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    will return \a src with the byte order swapped; otherwise it will return \a src
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    unmodified.
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*/
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/*!
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    \fn T qFromLittleEndian(const uchar *src)
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    \since 4.3
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    \relates <QtEndian>
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    Reads a little-endian number from memory location \a src and returns the number in
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    the host byte order representation.
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    On CPU architectures where the host byte order is big-endian (such as PowerPC) this
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    will swap the byte order; otherwise it will just read from \a src.
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    \note Template type \c{T} can either be a qint16, qint32 or qint64. Other types of
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    integers, e.g., qlong, are not applicable.
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    There are no data alignment constraints for \a src.
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    \sa qFromBigEndian()
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    \sa qToBigEndian()
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    \sa qToLittleEndian()
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*/
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/*!
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    \fn T qFromLittleEndian(T src)
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    \since 4.3
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    \relates <QtEndian>
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    \overload
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    Converts \a src from little-endian byte order and returns the number in host byte
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    order representation of that number.
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    On CPU architectures where the host byte order is big-endian (such as PowerPC) this
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    will return \a src with the byte order swapped; otherwise it will return \a src
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    unmodified.
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*/
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/*!
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    \fn void qToBigEndian(T src, uchar *dest)
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    \since 4.3
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    \relates <QtEndian>
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    Writes the number \a src with template type \c{T} to the memory location at \a dest
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    in big-endian byte order.
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    Note that template type \c{T} can only be an integer data type (signed or unsigned).
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    There are no data alignment constraints for \a dest.
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    \sa qFromBigEndian()
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    \sa qFromLittleEndian()
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    \sa qToLittleEndian()
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*/
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/*!
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    \fn T qToBigEndian(T src)
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    \since 4.3
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    \relates <QtEndian>
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    \overload
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    Converts \a src from host byte order and returns the number in big-endian byte order
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    representation of that number.
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    On CPU architectures where the host byte order is little-endian (such as x86) this
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    will return \a src with the byte order swapped; otherwise it will return \a src
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    unmodified.
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*/
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/*!
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    \fn void qToLittleEndian(T src, uchar *dest)
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    \since 4.3
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    \relates <QtEndian>
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    Writes the number \a src with template type \c{T} to the memory location at \a dest
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    in little-endian byte order.
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    Note that template type \c{T} can only be an integer data type (signed or unsigned).
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    There are no data alignment constraints for \a dest.
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    \sa qFromBigEndian()
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    \sa qFromLittleEndian()
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    \sa qToBigEndian()
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*/
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/*!
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    \fn T qToLittleEndian(T src)
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    \since 4.3
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    \relates <QtEndian>
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    \overload
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    Converts \a src from host byte order and returns the number in little-endian byte
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    order representation of that number.
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    On CPU architectures where the host byte order is big-endian (such as PowerPC) this
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    will return \a src with the byte order swapped; otherwise it will return \a src
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    unmodified.
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*/
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