Save binary data into XML file

[d_stranz]

is this right ?

No. A QByteArray is created empty with no size, so accessing text[ i ] on an empty array will cause a crash. Do this:

QByteArray text64 = QByteArray::fromRawData( pointer_to_buffer, len_of_my_buffer ).toBase64();
create_xml_function( text64, "encoded_data" );  // spaces not allowed in XML tags!

QByteArray text64 = QByteArray::fromRawData( pointer_to_buffer, len_of_my_buffer ).toBase64();
create_xml_function( text64, "encoded_data" );  // spaces not allowed in XML tags!

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Of course, you will want to add some error checking...