Windows-4.7.4/src/corelib/global/qendian.qdoc

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/*!
    \headerfile <QtEndian>
    \title Endian Conversion Functions
    \ingroup funclists
    \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.
*/