#include "pichunkstream.h"

/*! \class PIChunkStream
 * \brief Class for binary serialization
 * 
 * \section PIChunkStream_sec0 Synopsis
 * This class provides very handly mechanism to store and restore values to and from
 * \a PIByteArray. The main advantage of using this class is that your binary data
 * become independent from order and collection of your values.
 * 
 * \section PIChunkStream_sec1 Mechanism
 * %PIChunkStream works with items called "chunk". Chunk is an ID and any value that
 * can be stored and restored to \a PIByteArray with stream operators << and >>.
 * You can place chunks to stream and read chunks from stream.
 * 
 * To construct %PIChunkStream for writing data use any constructor. Empty constructor
 * creates internal empty buffer that can be accessed by function \a data().
 * Non-empty constructor works with given byte array.
 * 
 * To read chunks from byte array use function \a read() that returns ID of
 * next chunk. Then you can get value of this chunk with function \a getData(),
 * but you should definitely know type of this value. You can read from byte array
 * while \a atEnd() if false.
 * 
 * \section PIChunkStream_ex0 Example
 * Prepare your structs to work with %PIChunkStream
 * \snippet pichunkstream.cpp struct
 * Writing to %PIChunkStream
 * \snippet pichunkstream.cpp write
 * Reading from %PIChunkStream
 * \snippet pichunkstream.cpp read
 */


void PIChunkStream::setSource(const PIByteArray & data) {
	data_ = const_cast<PIByteArray*>(&data);
	_init();
}


void PIChunkStream::setSource(PIByteArray * data) {
	data_ = (data ? data : &tmp_data);
	_init();
}


PIChunkStream::~PIChunkStream() {

}


void PIChunkStream::_init() {
	last_id = -1;
	last_data.clear();
}