internal DeflateStream(Stream stream, CompressionMode mode, bool leaveOpen, bool usingGZip)
{
this._stream = stream;
this._mode = mode;
this._leaveOpen = leaveOpen;
if (this._stream == null) {
throw new ArgumentNullException("stream");
}
switch (this._mode) {
case CompressionMode.Decompress:
if (!this._stream.CanRead) {
throw new ArgumentException("The base stream is not readable.", "stream");
}
this.inflater = new Inflater(usingGZip);
this.m_CallBack = new AsyncCallback(this.ReadCallback);
break;
case CompressionMode.Compress:
if (!this._stream.CanWrite) {
throw new ArgumentException("The base stream is not writeable.", "stream");
}
this.deflater = new Deflater(usingGZip);
this.m_AsyncWriterDelegate = new AsyncWriteDelegate(this.InternalWrite);
this.m_CallBack = new AsyncCallback(this.WriteCallback);
break;
default:
throw new ArgumentException("Enum value was out of legal range.", "mode");
}
this.buffer = new byte[0x1000];
}
public DeflateStream(Stream stream, CompressionMode mode, bool leaveOpen)
{
this._stream = stream;
this._mode = mode;
this._leaveOpen = leaveOpen;
if (this._stream == null)
{
throw new ArgumentNullException("stream");
}
switch (this._mode)
{
case CompressionMode.Decompress:
if (!this._stream.CanRead)
{
throw new ArgumentException(SR.GetString("NotReadableStream"), "stream");
}
this.inflater = new Inflater();
this.m_CallBack = new AsyncCallback(this.ReadCallback);
break;
case CompressionMode.Compress:
if (!this._stream.CanWrite)
{
throw new ArgumentException(SR.GetString("NotWriteableStream"), "stream");
}
this.deflater = new Deflater();
this.m_AsyncWriterDelegate = new AsyncWriteDelegate(this.InternalWrite);
this.m_CallBack = new AsyncCallback(this.WriteCallback);
break;
default:
throw new ArgumentException(SR.GetString("ArgumentOutOfRange_Enum"), "mode");
}
this.buffer = new byte[0x1000];
}
public DeflateStream(Stream stream, CompressionMode mode, bool leaveOpen)
{
if (stream == null)
throw new ArgumentNullException("stream");
switch (mode)
{
case CompressionMode.Decompress:
if (!stream.CanRead)
{
throw new ArgumentException(SR.NotReadableStream, "stream");
}
_inflater = new Inflater();
break;
case CompressionMode.Compress:
if (!stream.CanWrite)
{
throw new ArgumentException(SR.NotWriteableStream, "stream");
}
_deflater = CreateDeflater(null);
break;
default:
throw new ArgumentException(SR.ArgumentOutOfRange_Enum, "mode");
}
_stream = stream;
_mode = mode;
_leaveOpen = leaveOpen;
_buffer = new byte[DefaultBufferSize];
}
internal DeflateStream(Stream stream, CompressionMode mode, bool leaveOpen, bool usingGZip){
_stream = stream;
_mode = mode;
_leaveOpen = leaveOpen;
if(_stream == null ) {
throw new ArgumentNullException("stream");
}
switch (_mode) {
case CompressionMode.Decompress:
if (!(_stream.CanRead)) {
throw new ArgumentException(SR.GetString(SR.NotReadableStream), "stream");
}
inflater = new Inflater(usingGZip);
m_CallBack = new AsyncCallback(ReadCallback);
break;
case CompressionMode.Compress:
if (!(_stream.CanWrite)) {
throw new ArgumentException(SR.GetString(SR.NotWriteableStream), "stream");
}
deflater = new Deflater(usingGZip);
m_AsyncWriterDelegate = new AsyncWriteDelegate(this.InternalWrite);
m_CallBack = new AsyncCallback(WriteCallback);
break;
default:
throw new ArgumentException(SR.GetString(SR.ArgumentOutOfRange_Enum), "mode");
}
buffer = new byte[bufferSize];
}
public DeflateStream(Stream stream, CompressionMode mode, bool leaveOpen) {
if(stream == null )
throw new ArgumentNullException("stream");
if (CompressionMode.Compress != mode && CompressionMode.Decompress != mode)
throw new ArgumentException(SR.GetString(SR.ArgumentOutOfRange_Enum), "mode");
_stream = stream;
_mode = mode;
_leaveOpen = leaveOpen;
switch (_mode) {
case CompressionMode.Decompress:
if (!_stream.CanRead) {
throw new ArgumentException(SR.GetString(SR.NotReadableStream), "stream");
}
inflater = new Inflater();
m_CallBack = new AsyncCallback(ReadCallback);
break;
case CompressionMode.Compress:
if (!_stream.CanWrite) {
throw new ArgumentException(SR.GetString(SR.NotWriteableStream), "stream");
}
deflater = CreateDeflater(null);
m_AsyncWriterDelegate = new AsyncWriteDelegate(this.InternalWrite);
m_CallBack = new AsyncCallback(WriteCallback);
break;
} // switch (_mode)
buffer = new byte[DefaultBufferSize];
}
/// <summary>
/// Sets up this DeflateStream to be used for Zlib Inflation/Decompression
/// </summary>
internal void InitializeInflater(Stream stream, bool leaveOpen, int windowBits)
{
Debug.Assert(stream != null);
if (!stream.CanRead)
throw new ArgumentException(SR.NotSupported_UnreadableStream, nameof(stream));
_inflater = new Inflater(windowBits);
_stream = stream;
_mode = CompressionMode.Decompress;
_leaveOpen = leaveOpen;
}
protected override void Dispose(bool disposing)
{
try
{
PurgeBuffers(disposing);
}
finally
{
// Close the underlying stream even if PurgeBuffers threw.
// Stream.Close() may throw here (may or may not be due to the same error).
// In this case, we still need to clean up internal resources, hence the inner finally blocks.
try
{
if (disposing && !_leaveOpen && _stream != null)
_stream.Dispose();
}
finally
{
_stream = null;
try
{
if (_deflater != null)
_deflater.Dispose();
if (_inflater != null)
_inflater.Dispose();
}
finally
{
_deflater = null;
_inflater = null;
base.Dispose(disposing);
}
}
}
}
/// <summary>
/// Sets up this DeflateStream to be used for Zlib Inflation/Decompression
/// </summary>
internal void InitializeInflater(Stream stream, bool leaveOpen, int windowBits)
{
Debug.Assert(stream != null);
if (!stream.CanRead)
throw new ArgumentException(SR.NotSupported_UnreadableStream, "stream");
_inflater = new Inflater(windowBits);
_stream = stream;
_mode = CompressionMode.Decompress;
_leaveOpen = leaveOpen;
_buffer = ArrayPool<byte>.Shared.Rent(DefaultBufferSize);
}
protected override void Dispose(bool disposing)
{
try
{
PurgeBuffers(disposing);
}
finally
{
// Close the underlying stream even if PurgeBuffers threw.
// Stream.Close() may throw here (may or may not be due to the same error).
// In this case, we still need to clean up internal resources, hence the inner finally blocks.
try
{
if (disposing && !_leaveOpen)
_stream?.Dispose();
}
finally
{
_stream = null;
try
{
_deflater?.Dispose();
_inflater?.Dispose();
}
finally
{
_deflater = null;
_inflater = null;
byte[] buffer = _buffer;
if (buffer != null)
{
_buffer = null;
if (!AsyncOperationIsActive)
{
ArrayPool<byte>.Shared.Return(buffer);
}
}
base.Dispose(disposing);
}
}
}
}
