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- using System;
- namespace BestHTTP.Decompression.Zlib
- {
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- internal class DeflateStream : System.IO.Stream
- {
- internal ZlibBaseStream _baseStream;
- internal System.IO.Stream _innerStream;
- bool _disposed;
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- public DeflateStream(System.IO.Stream stream, CompressionMode mode)
- : this(stream, mode, CompressionLevel.Default, false)
- {
- }
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- public DeflateStream(System.IO.Stream stream, CompressionMode mode, CompressionLevel level)
- : this(stream, mode, level, false)
- {
- }
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- public DeflateStream(System.IO.Stream stream, CompressionMode mode, bool leaveOpen)
- : this(stream, mode, CompressionLevel.Default, leaveOpen)
- {
- }
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- public DeflateStream(System.IO.Stream stream, CompressionMode mode, CompressionLevel level, bool leaveOpen)
- {
- _innerStream = stream;
- _baseStream = new ZlibBaseStream(stream, mode, level, ZlibStreamFlavor.DEFLATE, leaveOpen);
- }
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- public DeflateStream(System.IO.Stream stream, CompressionMode mode, CompressionLevel level, bool leaveOpen, int windowBits)
- {
- _innerStream = stream;
- _baseStream = new ZlibBaseStream(stream, mode, level, ZlibStreamFlavor.DEFLATE, leaveOpen, windowBits);
- }
- #region Zlib properties
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- virtual public FlushType FlushMode
- {
- get { return (this._baseStream._flushMode); }
- set
- {
- if (_disposed) throw new ObjectDisposedException("DeflateStream");
- this._baseStream._flushMode = value;
- }
- }
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- public int BufferSize
- {
- get
- {
- return this._baseStream._bufferSize;
- }
- set
- {
- if (_disposed) throw new ObjectDisposedException("DeflateStream");
- if (this._baseStream._workingBuffer != null)
- throw new ZlibException("The working buffer is already set.");
- if (value < ZlibConstants.WorkingBufferSizeMin)
- throw new ZlibException(String.Format("Don't be silly. {0} bytes?? Use a bigger buffer, at least {1}.", value, ZlibConstants.WorkingBufferSizeMin));
- this._baseStream._bufferSize = value;
- }
- }
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- public CompressionStrategy Strategy
- {
- get
- {
- return this._baseStream.Strategy;
- }
- set
- {
- if (_disposed) throw new ObjectDisposedException("DeflateStream");
- this._baseStream.Strategy = value;
- }
- }
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- virtual public long TotalIn
- {
- get
- {
- return this._baseStream._z.TotalBytesIn;
- }
- }
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- virtual public long TotalOut
- {
- get
- {
- return this._baseStream._z.TotalBytesOut;
- }
- }
- #endregion
- #region System.IO.Stream methods
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- protected override void Dispose(bool disposing)
- {
- try
- {
- if (!_disposed)
- {
- if (disposing && (this._baseStream != null))
- this._baseStream.Close();
- _disposed = true;
- }
- }
- finally
- {
- base.Dispose(disposing);
- }
- }
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- public override bool CanRead
- {
- get
- {
- if (_disposed) throw new ObjectDisposedException("DeflateStream");
- return _baseStream._stream.CanRead;
- }
- }
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- public override bool CanSeek
- {
- get { return false; }
- }
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- public override bool CanWrite
- {
- get
- {
- if (_disposed) throw new ObjectDisposedException("DeflateStream");
- return _baseStream._stream.CanWrite;
- }
- }
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- public override void Flush()
- {
- if (_disposed) throw new ObjectDisposedException("DeflateStream");
- _baseStream.Flush();
- }
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- public override long Length
- {
- get { throw new NotImplementedException(); }
- }
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- public override long Position
- {
- get
- {
- if (this._baseStream._streamMode == BestHTTP.Decompression.Zlib.ZlibBaseStream.StreamMode.Writer)
- return this._baseStream._z.TotalBytesOut;
- if (this._baseStream._streamMode == BestHTTP.Decompression.Zlib.ZlibBaseStream.StreamMode.Reader)
- return this._baseStream._z.TotalBytesIn;
- return 0;
- }
- set { throw new NotImplementedException(); }
- }
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- public override int Read(byte[] buffer, int offset, int count)
- {
- if (_disposed) throw new ObjectDisposedException("DeflateStream");
- return _baseStream.Read(buffer, offset, count);
- }
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- public override long Seek(long offset, System.IO.SeekOrigin origin)
- {
- throw new NotImplementedException();
- }
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- public override void SetLength(long value)
- {
- _baseStream.SetLength(value);
- }
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- public override void Write(byte[] buffer, int offset, int count)
- {
- if (_disposed) throw new ObjectDisposedException("DeflateStream");
- _baseStream.Write(buffer, offset, count);
- }
- #endregion
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- public static byte[] CompressString(String s)
- {
- using (var ms = new System.IO.MemoryStream())
- {
- System.IO.Stream compressor =
- new DeflateStream(ms, CompressionMode.Compress, CompressionLevel.BestCompression);
- ZlibBaseStream.CompressString(s, compressor);
- return ms.ToArray();
- }
- }
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- public static byte[] CompressBuffer(byte[] b)
- {
- using (var ms = new System.IO.MemoryStream())
- {
- System.IO.Stream compressor =
- new DeflateStream( ms, CompressionMode.Compress, CompressionLevel.BestCompression );
- ZlibBaseStream.CompressBuffer(b, compressor);
- return ms.ToArray();
- }
- }
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- public static String UncompressString(byte[] compressed)
- {
- using (var input = new System.IO.MemoryStream(compressed))
- {
- System.IO.Stream decompressor =
- new DeflateStream(input, CompressionMode.Decompress);
- return ZlibBaseStream.UncompressString(compressed, decompressor);
- }
- }
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- public static byte[] UncompressBuffer(byte[] compressed)
- {
- using (var input = new System.IO.MemoryStream(compressed))
- {
- System.IO.Stream decompressor = new DeflateStream( input, CompressionMode.Decompress );
- return ZlibBaseStream.UncompressBuffer(compressed, decompressor);
- }
- }
- }
- }
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