118 lines
2.3 KiB
C#
118 lines
2.3 KiB
C#
// ZipPartStream.cs created with MonoDevelop
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// User: alan at 13:13 23/10/2008
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//
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// To change standard headers go to Edit->Preferences->Coding->Standard Headers
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//
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using System;
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using System.IO;
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using zipsharp;
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namespace System.IO.Packaging
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{
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internal class ZipPartStream : Stream
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{
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public MemoryStream BaseStream { get; private set; }
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public ZipPackage Package { get; private set; }
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public override bool CanRead {
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get {
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return BaseStream.CanRead;
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}
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}
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public override bool CanSeek {
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get {
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return BaseStream.CanSeek;
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}
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}
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public override bool CanTimeout {
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get { return BaseStream.CanTimeout; }
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}
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public override bool CanWrite {
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get { return Writeable; }
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}
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public override long Length {
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get { return BaseStream.Length; }
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}
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public override long Position {
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get; set;
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}
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public bool Writeable {
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get; set;
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}
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public override int WriteTimeout {
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get {
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return BaseStream.WriteTimeout;
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}
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set {
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BaseStream.WriteTimeout = value;
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}
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}
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public override int ReadTimeout {
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get {
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return BaseStream.ReadTimeout;
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}
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set {
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BaseStream.ReadTimeout = value;
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}
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}
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public ZipPartStream (ZipPackage package, MemoryStream stream, FileAccess access)
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{
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BaseStream = stream;
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Package = package;
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Writeable = access != FileAccess.Read;
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}
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public override void Flush ()
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{
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// If the user flushes any of the part streams,
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// we need to flush the entire package
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// FIXME: Ensure that this actually happens with a testcase
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// ...if possible
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Package.Flush ();
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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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Seek (Position, SeekOrigin.Begin);
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int read = BaseStream.Read (buffer, offset, count);
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Position += read;
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return read;
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}
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public override long Seek (long offset, SeekOrigin origin)
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{
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Position = BaseStream.Seek (offset, origin);
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return Position;
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}
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public override void SetLength (long value)
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{
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if (!CanWrite)
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throw new InvalidOperationException ("Stream is not writeable");
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BaseStream.SetLength (value);
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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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if (!CanWrite)
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throw new InvalidOperationException ("Stream is not writeable");
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Seek (Position, SeekOrigin.Begin);
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BaseStream.Write (buffer, offset, count);
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Position += count;
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}
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}
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}
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