/// <summary>
/// Reads next continuing FETCH line and stores to fetch reader 'r'.
/// </summary>
/// <param name="imap">IMAP client.</param>
/// <param name="r">String reader.</param>
/// <param name="callback">Fetch completion callback.</param>
/// <returns>Returns true if completed asynchronously or false if completed synchronously.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>imap</b>,<b>r</b> or <b>callback</b> is null reference.</exception>
private bool ReadNextFetchLine(IMAP_Client imap,StringReader r,EventHandler<EventArgs<Exception>> callback)
{
if(imap == null){
throw new ArgumentNullException("imap");
}
if(r == null){
throw new ArgumentNullException("r");
}
if(callback == null){
throw new ArgumentNullException("callback");
}
SmartStream.ReadLineAsyncOP readLineOP = new SmartStream.ReadLineAsyncOP(new byte[64000],SizeExceededAction.JunkAndThrowException);
readLineOP.Completed += delegate(object sender,EventArgs<SmartStream.ReadLineAsyncOP> e){
try{
// Read line failed.
if(readLineOP.Error != null){
callback(this,new EventArgs<Exception>(readLineOP.Error));
}
else{
// Log.
imap.LogAddRead(readLineOP.BytesInBuffer,readLineOP.LineUtf8);
// Append fetch line to fetch reader.
r.AppendString(readLineOP.LineUtf8);
ParseDataItems(imap,r,callback);
}
}
catch(Exception x){
callback(this,new EventArgs<Exception>(x));
}
finally{
readLineOP.Dispose();
}
};
// Read line completed synchronously.
if(imap.TcpStream.ReadLine(readLineOP,true)){
try{
// Read line failed.
if(readLineOP.Error != null){
callback(this,new EventArgs<Exception>(readLineOP.Error));
return true;
}
else{
// Log.
imap.LogAddRead(readLineOP.BytesInBuffer,readLineOP.LineUtf8);
// Append fetch line to fetch reader.
r.AppendString(readLineOP.LineUtf8);
return false;
}
}
finally{
readLineOP.Dispose();
}
}
return true;
}