public UnsyncFilterStream(Stream underlyingStream, UnsyncMode mode, bool leaveOpen)
{
if (underlyingStream == null) {
throw new ArgumentNullException("underlyingStream");
}
if (!Enum.IsDefined(typeof(UnsyncMode), mode)) {
throw new InvalidEnumArgumentException("mode", (int)mode, typeof(UnsyncMode));
}
this.underlyingStream = underlyingStream;
this.mode = mode;
this.leaveOpen = leaveOpen;
}
public int ReadBytes(byte[] buffer, int offset, int count, UnsyncMode unsyncMode)
{
int bytesRead = 0;
if (!Unsynchronization)
{
bytesRead = stream.Read(buffer, offset, count);
position += bytesRead;
}
else
{
int i = 0;
if (unsyncMode == UnsyncMode.CountExcludesUnsyncBytes)
{
for (; i < count; ++i)
{
buffer[offset + i] = ReadByte();
}
}
else if (unsyncMode == UnsyncMode.CountIncludesUnsyncBytes)
{
int unsyncBefore = UnsynchronizationCounter;
for (; i + (UnsynchronizationCounter - unsyncBefore) < count; i++)
{
buffer[offset + i] = ReadByte();
}
}
else
{
throw new NotSupportedException("Unknown unsync mode");
}
bytesRead = i;
}
return(bytesRead);
}