private int Read(DelimittedStreamReader.DelimittedReadStream caller, byte[] buffer, int offset, int count)
{
if (this.currentStream != caller)
{
return(0);
}
int num = this.stream.Read(buffer, offset, count);
if (num == 0)
{
this.canGetNextStream = false;
this.currentStream = null;
return(num);
}
if (this.delimitter == null)
{
return(num);
}
int num2 = this.ProcessRead(buffer, offset, num);
if (num2 < 0)
{
if (this.matchBuffer == null || this.matchBuffer.Length < this.delimitter.Length - num)
{
this.matchBuffer = new byte[this.delimitter.Length - num];
}
int count2 = this.stream.ReadBlock(this.matchBuffer, 0, this.delimitter.Length - num);
if (this.MatchRemainder(num, count2))
{
this.currentStream = null;
num2 = 0;
}
else
{
this.stream.Push(this.matchBuffer, 0, count2);
int num3 = 1;
while (num3 < num && buffer[num3] != this.delimitter[0])
{
num3++;
}
if (num3 < num)
{
this.stream.Push(buffer, offset + num3, num - num3);
}
num2 = num3;
}
}
return(num2);
}
public Stream GetNextStream(byte[] delimitterValue, int?contentLength)
{
if (this.currentStream != null)
{
this.currentStream.Dispose();// Close();
this.currentStream = null;
}
if (!this.canGetNextStream)
{
return(null);
}
this.delimitter = delimitterValue;
this.canGetNextStream = (delimitterValue != null);
this.currentStream = new DelimittedStreamReader.DelimittedReadStream(this, contentLength);
return(this.currentStream);
}
private void Close(DelimittedStreamReader.DelimittedReadStream caller)
{
if (this.currentStream == caller)
{
if (this.delimitter == null)
{
this.stream.Close();
}
else
{
if (this.scratch == null)
{
this.scratch = new byte[1024];
}
while (this.Read(caller, this.scratch, 0, this.scratch.Length) != 0)
{
}
}
this.currentStream = null;
}
}
private int ProcessRead(byte[] buffer, int offset, int read)
{
if (read == 0)
{
return(read);
}
int i = offset;
int num = offset + read;
while (i < num)
{
if (buffer[i] == this.delimitter[0])
{
switch (this.MatchDelimitter(buffer, i, num))
{
case DelimittedStreamReader.MatchState.True:
{
int result = i - offset;
i += this.delimitter.Length;
this.stream.Push(buffer, i, num - i);
this.currentStream = null;
return(result);
}
case DelimittedStreamReader.MatchState.InsufficientData:
{
int num2 = i - offset;
if (num2 > 0)
{
this.stream.Push(buffer, i, num - i);
return(num2);
}
return(-1);
}
}
}
i++;
}
return(read);
}
