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Asked: 2026-06-06T12:02:11+00:00

I’m developing a protocol for my company using Qt. It is required to query

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I’m developing a protocol for my company using Qt. It is required to query the Window Registry and write the value obtained into a prenegotiated socket. I have read the Registry Data into a QString. I must use 8-bit Unicode characters and for some 16-bit Unicode characters. I am using QByteArray to store all the data before writing to the socket using QTcpSocket::write(). Little Endianness must be followed.

  1. How do I get the data from QString into QByteArray in Unicode 8 bit format (specification says character type corresponds to quint8)?

  2. How do I get the data from QString into QByteArray in Unicode 16 bit format (specification says character type corresponds to quint16)?

  3. How can I maintain Little Endianness in all cases?

(I have no experience of dealing with Unicode/variable-byte-encoded data)

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  1. Editorial Team

    Looking in the documentation is a good start.

    1. QString::toUtf8()
    2. Create a new QByteArray starting with a BOM. Use QString::utf16() to get the ushort values, mask out the top and bottom halves in the endianness you want into the QByteArray.
    3. UTF-8 doesn’t have/need endianness. The ushort masks needed to put 16-bit values into an 8-bit array for little endianness would be 0x00FF then 0xFF00.
    4. Read The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!) at home tonight.
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