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authoraxis <qt-info@nokia.com>2009-04-24 11:34:15 (GMT)
committeraxis <qt-info@nokia.com>2009-04-24 11:34:15 (GMT)
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Long live Qt for S60!
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+ \headerfile <QtEndian>
+ \title Endian Conversion Functions
+ \ingroup architecture
+ \brief The <QtEndian> header provides functions to convert between
+ little and big endian representations of numbers.
+*/
+
+/*!
+ \fn T qFromBigEndian(const uchar *src)
+ \since 4.3
+ \relates <QtEndian>
+
+ Reads a big-endian number from memory location \a src and returns the number in the
+ host byte order representation.
+ On CPU architectures where the host byte order is little-endian (such as x86) this
+ will swap the byte order; otherwise it will just read from \a src.
+
+ \note Template type \c{T} can either be a qint16, qint32 or qint64. Other types of
+ integers, e.g., qlong, are not applicable.
+
+ There are no data alignment constraints for \a src.
+
+ \sa qFromLittleEndian()
+ \sa qToBigEndian()
+ \sa qToLittleEndian()
+*/
+/*!
+ \fn T qFromBigEndian(T src)
+ \since 4.3
+ \relates <QtEndian>
+ \overload
+
+ Converts \a src from big-endian byte order and returns the number in host byte order
+ representation of that number.
+ On CPU architectures where the host byte order is little-endian (such as x86) this
+ will return \a src with the byte order swapped; otherwise it will return \a src
+ unmodified.
+*/
+/*!
+ \fn T qFromLittleEndian(const uchar *src)
+ \since 4.3
+ \relates <QtEndian>
+
+ Reads a little-endian number from memory location \a src and returns the number in
+ the host byte order representation.
+ On CPU architectures where the host byte order is big-endian (such as PowerPC) this
+ will swap the byte order; otherwise it will just read from \a src.
+
+ \note Template type \c{T} can either be a qint16, qint32 or qint64. Other types of
+ integers, e.g., qlong, are not applicable.
+
+ There are no data alignment constraints for \a src.
+
+ \sa qFromBigEndian()
+ \sa qToBigEndian()
+ \sa qToLittleEndian()
+*/
+/*!
+ \fn T qFromLittleEndian(T src)
+ \since 4.3
+ \relates <QtEndian>
+ \overload
+
+ Converts \a src from little-endian byte order and returns the number in host byte
+ order representation of that number.
+ On CPU architectures where the host byte order is big-endian (such as PowerPC) this
+ will return \a src with the byte order swapped; otherwise it will return \a src
+ unmodified.
+*/
+/*!
+ \fn void qToBigEndian(T src, uchar *dest)
+ \since 4.3
+ \relates <QtEndian>
+
+ Writes the number \a src with template type \c{T} to the memory location at \a dest
+ in big-endian byte order.
+
+ Note that template type \c{T} can only be an integer data type (signed or unsigned).
+
+ There are no data alignment constraints for \a dest.
+
+ \sa qFromBigEndian()
+ \sa qFromLittleEndian()
+ \sa qToLittleEndian()
+*/
+/*!
+ \fn T qToBigEndian(T src)
+ \since 4.3
+ \relates <QtEndian>
+ \overload
+
+ Converts \a src from host byte order and returns the number in big-endian byte order
+ representation of that number.
+ On CPU architectures where the host byte order is little-endian (such as x86) this
+ will return \a src with the byte order swapped; otherwise it will return \a src
+ unmodified.
+*/
+/*!
+ \fn void qToLittleEndian(T src, uchar *dest)
+ \since 4.3
+ \relates <QtEndian>
+
+ Writes the number \a src with template type \c{T} to the memory location at \a dest
+ in little-endian byte order.
+
+ Note that template type \c{T} can only be an integer data type (signed or unsigned).
+
+ There are no data alignment constraints for \a dest.
+
+ \sa qFromBigEndian()
+ \sa qFromLittleEndian()
+ \sa qToBigEndian()
+*/
+/*!
+ \fn T qToLittleEndian(T src)
+ \since 4.3
+ \relates <QtEndian>
+ \overload
+
+ Converts \a src from host byte order and returns the number in little-endian byte
+ order representation of that number.
+ On CPU architectures where the host byte order is big-endian (such as PowerPC) this
+ will return \a src with the byte order swapped; otherwise it will return \a src
+ unmodified.
+*/
+