CarotDav_decompile/Rei.Fs/PartialStream.cs

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// Decompiled with JetBrains decompiler
// Type: Rei.Fs.PartialStream
// Assembly: Rei.Fs, Version=1.13.2.8796, Culture=neutral, PublicKeyToken=null
// MVID: D8B08A8B-697C-4439-9CFF-1BE4EE46F7B0
// Assembly location: F:\Eigene Dateien\Dropbox\portable Collection\Progs\CarotDAV\Rei.Fs.dll
using Microsoft.VisualBasic.CompilerServices;
using System;
using System.IO;
using System.Runtime.CompilerServices;
namespace Rei.Fs
{
public class PartialStream : Stream
{
private Stream pBaseStream;
private long pLength;
private long pInnerPos;
private long pStart;
private int pLastCount;
public object Tag;
private object pSyncObject;
private bool pHasError;
private bool pDisposed;
public PartialStream(Stream basestream, long length)
{
this.pHasError = false;
this.pDisposed = false;
this.pBaseStream = basestream;
this.pLength = length;
this.pInnerPos = 0L;
if (!this.pBaseStream.CanSeek)
return;
this.pStart = this.pBaseStream.Position;
}
public Stream BaseStream
{
get
{
return this.pBaseStream;
}
}
public override bool CanRead
{
get
{
return this.pBaseStream.CanRead;
}
}
public override bool CanSeek
{
get
{
return this.pBaseStream.CanSeek;
}
}
public override bool CanWrite
{
get
{
return this.pBaseStream.CanWrite;
}
}
public override bool CanTimeout
{
get
{
return this.pBaseStream.CanTimeout;
}
}
public override long Length
{
get
{
if (this.pLength < 0L)
throw new NotSupportedException();
return this.pLength;
}
}
public override int ReadTimeout
{
get
{
return this.pBaseStream.ReadTimeout;
}
set
{
this.pBaseStream.ReadTimeout = value;
}
}
public override int WriteTimeout
{
get
{
return this.pBaseStream.WriteTimeout;
}
set
{
this.pBaseStream.WriteTimeout = value;
}
}
public override long Position
{
get
{
return this.pInnerPos;
}
set
{
this.Seek(value, SeekOrigin.Begin);
}
}
public override long Seek(long offset, SeekOrigin origin)
{
try
{
switch (origin)
{
case SeekOrigin.Current:
checked { offset += this.Position; }
break;
case SeekOrigin.End:
if (this.pLength < 0L)
throw new NotSupportedException();
offset = checked (this.pLength - offset);
break;
}
if (offset < 0L || this.pLength >= 0L && offset > this.pLength)
throw new ArgumentOutOfRangeException();
this.pBaseStream.Seek(checked (this.pStart + offset), SeekOrigin.Begin);
this.pInnerPos = offset;
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
this.pHasError = true;
throw;
}
long num;
return num;
}
public override void SetLength(long value)
{
throw new NotSupportedException();
}
public override int Read(byte[] buffer, int offset, int count)
{
try
{
if (this.pInnerPos < 0L)
this.Position = 0L;
if (this.pLength >= 0L && checked (this.pInnerPos + (long) count) > this.pLength)
count = checked ((int) (this.pLength - this.pInnerPos));
int num = this.pBaseStream.Read(buffer, offset, count);
this.pInnerPos = checked (this.pInnerPos + (long) num);
if (num == 0 && count > 0 && (this.pLength >= 0L && this.pInnerPos < this.pLength))
throw new IOException("Invalid Stream Length");
return num;
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
this.pHasError = true;
throw;
}
}
public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
{
try
{
if (this.pInnerPos < 0L)
this.Position = 0L;
if (this.pLength >= 0L && checked (this.pInnerPos + (long) count) > this.pLength)
count = checked ((int) (this.pLength - this.pInnerPos));
this.pLastCount = count;
return this.pBaseStream.BeginRead(buffer, offset, count, callback, RuntimeHelpers.GetObjectValue(state));
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
this.pHasError = true;
throw;
}
}
public override int EndRead(IAsyncResult asyncResult)
{
try
{
int num = this.pBaseStream.EndRead(asyncResult);
this.pInnerPos = checked (this.pInnerPos + (long) num);
if (num == 0 && this.pLastCount > 0 && (this.pLength >= 0L && this.pInnerPos < this.pLength))
throw new IOException("Invalid Stream Length");
return num;
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
this.pHasError = true;
throw;
}
}
public override void Write(byte[] buffer, int offset, int count)
{
try
{
if (this.pInnerPos < 0L)
this.Position = 0L;
if (this.pLength >= 0L && checked (this.pInnerPos + (long) count) > this.pLength)
throw new InvalidRangeException();
this.pBaseStream.Write(buffer, offset, count);
this.pInnerPos = checked (this.pInnerPos + (long) count);
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
this.pHasError = true;
throw;
}
}
public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
{
try
{
if (this.pInnerPos < 0L)
this.Position = 0L;
if (this.pLength >= 0L && checked (this.pInnerPos + (long) count) > this.pLength)
throw new ArgumentException();
this.pLastCount = count;
return this.pBaseStream.BeginWrite(buffer, offset, count, callback, RuntimeHelpers.GetObjectValue(state));
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
this.pHasError = true;
throw;
}
}
public override void EndWrite(IAsyncResult asyncResult)
{
try
{
this.pBaseStream.EndWrite(asyncResult);
this.pInnerPos = checked (this.pInnerPos + (long) this.pLastCount);
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
this.pHasError = true;
throw;
}
}
public override void Flush()
{
try
{
this.pBaseStream.Flush();
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
this.pHasError = true;
throw;
}
}
protected override void Dispose(bool disposing)
{
try
{
if (!disposing || this.pDisposed)
return;
this.pDisposed = true;
if (this.pHasError)
{
try
{
this.pBaseStream.Close();
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
ProjectData.ClearProjectError();
}
}
else
{
if (this.pLength >= 0L && this.pInnerPos != this.pLength)
{
string message = "Length:" + this.pLength.ToString() + " Position:" + this.pInnerPos.ToString();
try
{
this.pBaseStream.Close();
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
Exception innerexception = ex;
throw new InvalidRangeException(message, innerexception);
}
throw new InvalidRangeException(message);
}
this.pBaseStream.Close();
}
}
finally
{
base.Dispose(disposing);
}
}
}
}