/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the documentation of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:FDL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** GNU Free Documentation License Usage ** Alternatively, this file may be used under the terms of the GNU Free ** Documentation License version 1.3 as published by the Free Software ** Foundation and appearing in the file included in the packaging of ** this file. Please review the following information to ensure ** the GNU Free Documentation License version 1.3 requirements ** will be met: https://www.gnu.org/licenses/fdl-1.3.html. ** $QT_END_LICENSE$ ** ****************************************************************************/ /*! \headerfile \title Endian Conversion Functions \ingroup funclists \brief The header provides functions to convert between little and big endian representations of numbers. */ /*! \internal \fn T qFromUnaligned(const void *ptr) \since 5.5 Loads a \c{T} from address \a ptr, which may be misaligned. Use of this function avoids the undefined behavior that the C++ standard otherwise attributes to unaligned loads. */ /*! \internal \fn void qToUnaligned(T t, void *ptr) \since 4.5 Stores \a t to address \a ptr, which may be misaligned. Use of this function avoids the undefined behavior that the C++ standard otherwise attributes to unaligned stores. */ /*! \fn T qFromBigEndian(const void *src) \since 4.3 \relates 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. \note Since Qt 5.7, the type of the \a src parameter is a void pointer. There are no data alignment constraints for \a src. \sa qFromLittleEndian() \sa qToBigEndian() \sa qToLittleEndian() */ /*! \fn T qFromBigEndian(T src) \since 4.3 \relates \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 void *src) \since 4.3 \relates 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. \note Since Qt 5.7, the type of the \a src parameter is a void pointer. There are no data alignment constraints for \a src. \sa qFromBigEndian() \sa qToBigEndian() \sa qToLittleEndian() */ /*! \fn T qFromLittleEndian(T src) \since 4.3 \relates \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, void *dest) \since 4.3 \relates 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. \note Since Qt 5.7, the type of the \a dest parameter is a void pointer. \sa qFromBigEndian() \sa qFromLittleEndian() \sa qToLittleEndian() */ /*! \fn T qToBigEndian(T src) \since 4.3 \relates \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, void *dest) \since 4.3 \relates 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. \note Since Qt 5.7, the type of the \a dest parameter is a void pointer. \sa qFromBigEndian() \sa qFromLittleEndian() \sa qToBigEndian() */ /*! \fn T qToLittleEndian(T src) \since 4.3 \relates \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. */