108 lines
2.8 KiB
C#
108 lines
2.8 KiB
C#
// ZipReadStream.cs
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//
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// Copyright (c) 2008 [copyright holders]
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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//
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using System;
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using System.IO;
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using System.IO.Packaging;
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namespace zipsharp
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{
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class UnzipReadStream : Stream
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{
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long length;
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UnzipArchive Archive { get; set; }
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public override bool CanRead {
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get { return true; }
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}
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public override bool CanSeek {
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get { return false; }
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}
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public override bool CanWrite {
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get { return false; }
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}
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public override bool CanTimeout {
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get { return false; }
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}
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public CompressionOption CompressionLevel {
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get; set;
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}
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public override long Length {
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get {
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return length;
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}
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}
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public override long Position {
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get { return NativeUnzip.CurrentFilePosition (Archive.Handle); }
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set { throw new NotSupportedException (); }
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}
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public UnzipReadStream (UnzipArchive archive, CompressionOption compressionLevel)
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{
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Archive = archive;
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Archive.FileActive = true;
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CompressionLevel = compressionLevel;
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length = NativeVersion.Use32Bit ? NativeUnzip.CurrentFileLength32 (Archive.Handle) : NativeUnzip.CurrentFileLength64 (Archive.Handle);
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}
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public override void Close()
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{
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Archive.FileActive = false;
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NativeUnzip.CloseCurrentFile (Archive.Handle);
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}
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public override void Flush()
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{
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}
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public override int Read(byte[] buffer, int offset, int count)
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{
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return NativeUnzip.Read (Archive.Handle, buffer, offset, count);
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}
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public override long Seek(long offset, SeekOrigin origin)
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{
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throw new NotSupportedException ();
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}
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public override void SetLength(long value)
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{
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throw new NotSupportedException ();
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}
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public override void Write(byte[] buffer, int offset, int count)
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{
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throw new NotSupportedException ();
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}
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}
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}
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