public BinaryEncoderStream(BinaryCodec codec, TextWriter outputWriter, int?bufferLength = null, bool closeWriter = true)
{
if (codec == null)
{
throw new ArgumentNullException(nameof(codec));
}
if (outputWriter == null)
{
throw new ArgumentNullException(nameof(outputWriter));
}
int outputBufferLength = bufferLength ?? DefaultOutputBufferSize;
if ((outputBufferLength <= 0) || (outputBufferLength < codec.MinimumOutputBuffer))
{
throw new ArgumentOutOfRangeException(nameof(bufferLength));
}
_encoder = codec.GetEncoder();
_outputWriter = outputWriter;
_inputBufferLength = codec.MinimumInputBuffer;
_outputBuffer = new char[outputBufferLength];
_closeWriter = closeWriter;
}
private static void Encode(BinaryCodec encoding, Stream inputStream, TextWriter outputWriter)
{
byte[] inputBuffer = new byte[encoding.MinimumInputBuffer];
char[] outputBuffer = new char[encoding.MinimumOutputBuffer];
bool readEof = false;
int inputBufferEnd = 0;
int inputBufferUsed;
int outputBufferUsed;
BinaryEncoder encoder = encoding.GetEncoder();
while (true)
{
if ((inputBufferEnd < inputBuffer.Length) && (!readEof))
{
int bytesRead = inputStream.Read(inputBuffer, inputBufferEnd, inputBuffer.Length - inputBufferEnd);
if (bytesRead == 0)
{
readEof = true;
}
inputBufferEnd += bytesRead;
}
// stop when we've read EOF and Convert returns true..
bool finished = ((encoder.Convert(inputBuffer, 0, inputBufferEnd,
outputBuffer, 0, outputBuffer.Length,
readEof,
out inputBufferUsed,
out outputBufferUsed)) && (readEof));
// dump any output produced to outputWriter..
outputWriter.Write(outputBuffer, 0, outputBufferUsed);
if (finished)
{
break;
}
// shift input as needed..
if (inputBufferUsed != 0)
{
if (inputBufferUsed < inputBufferEnd)
{
Buffer.BlockCopy(inputBuffer, inputBufferUsed, inputBuffer, 0, inputBufferEnd - inputBufferUsed);
inputBufferEnd -= inputBufferUsed;
}
else
{
inputBufferEnd = 0;
}
}
}
}
