/// <summary>
/// Default constructor.
/// </summary>
/// <param name="streamHelper">Reference to StreamHelper.</param>
/// <param name="storeStream">Stream where to store readed data.</param>
/// <param name="maxSize">Maximum number of bytes to read.</param>
/// <param name="exceededAction">Specifies how this method behaves when maximum size exceeded.</param>
/// <param name="callback">Callback what will be called if asynchronous reading compltes.</param>
/// <param name="tag">User data.</param>
public _ToStreamReader(StreamHelper streamHelper,Stream storeStream,int maxSize,SizeExceededAction exceededAction,ReadToStreamCallback callback,object tag)
{
m_pStreamHelper = streamHelper;
m_pStoreStream = storeStream;
m_pBufferedStream = new BufferedStream(m_pStoreStream,32000);
m_MaxSize = maxSize;
m_ExceededAction = exceededAction;
m_pCallback = callback;
m_pTag = tag;
m_pBuffer = new byte[32000];
m_pLineBuffer = new byte[4096];
}
/// <summary>
/// Reades all data from the specified stream and writes it to source stream. Period handlign and period terminator is added as required.
/// </summary>
/// <param name="stream">Stream which data to write to source stream.</param>
/// <param name="maxSize">Maximum muber of bytes to read from <b>stream</b> and write source stream.</param>
/// <returns>Returns number of bytes written to source stream. Note this value differs from
/// <b>stream</b> readed bytes count because of period handling and period terminator.
/// </returns>
/// <exception cref="ArgumentNullException">Raised when <b>stream</b> is null.</exception>
/// <exception cref="InvalidOperationException">Raised when there already is pending write operation.</exception>
/// <exception cref="LineSizeExceededException">Raised when <b>stream</b> contains line with bigger line size than allowed.</exception>
/// <exception cref="DataSizeExceededException">Raised when <b>stream</b> has more data than <b>maxSize</b> allows..</exception>
public int WritePeriodTerminated(Stream stream,int maxSize)
{
if(stream == null){
throw new ArgumentNullException("stream");
}
lock(this){
if(m_IsWriteActive){
throw new InvalidOperationException("There is pending write operation, multiple write operations not allowed !");
}
m_IsWriteActive = true;
}
try{
BufferedStream bufferedStoreStream = new BufferedStream(m_pStream,32000);
StreamHelper reader = new StreamHelper(stream);
int totalWrittenCount = 0;
int readedCount = 0;
int rawReadedCount = 0;
while(true){
// Read data block.
readedCount = this.ReadLineInternal(m_pLineBuffer,SizeExceededAction.ThrowException,out rawReadedCount,false);
// We reached end of stream, no more data.
if(readedCount == 0){
break;
}
// Maximum allowed data size exceeded.
if((totalWrittenCount + rawReadedCount) > maxSize){
throw new DataSizeExceededException();
}
// If line starts with period(.), additional period is added.
if(m_pLineBuffer[0] == '.'){
bufferedStoreStream.WriteByte((byte)'.');
totalWrittenCount++;
}
// Write readed line to buffered stream.
bufferedStoreStream.Write(m_pLineBuffer,0,readedCount);
bufferedStoreStream.Write(m_LineBreak,0,m_LineBreak.Length);
totalWrittenCount += (readedCount + m_LineBreak.Length);
}
// Write terminator ".<CRLF>". We have start <CRLF> already in stream.
bufferedStoreStream.Write(new byte[]{(byte)'.',(byte)'\r',(byte)'\n'},0,3);
bufferedStoreStream.Flush();
m_pStream.Flush();
// Log
if(this.Logger != null){
this.Logger.AddWrite(totalWrittenCount,null);
}
return totalWrittenCount;
}
finally{
m_IsWriteActive = false;
}
}