// Decompiled with JetBrains decompiler
// Type: CarotDAV.OleStream
// Assembly: CarotDAV, Version=1.13.2.18337, Culture=neutral, PublicKeyToken=null
// MVID: C31F2651-A4A8-4D09-916A-8C6106F5E7C8
// Assembly location: F:\Eigene Dateien\Dropbox\portable Collection\Progs\CarotDAV\CarotDAV.exe

using Microsoft.VisualBasic.CompilerServices;
using Rei.Fs;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;
using System.Threading;

namespace CarotDAV
{
  [ClassInterface(ClassInterfaceType.None)]
  public class OleStream : IStream, IDisposable
  {
    private static DateTime win32timeorigin = new DateTime(1601, 1, 1, 0, 0, 0, DateTimeKind.Utc);
    private const int E_NOTIMPL = -2147483647;
    private const int E_PENDING = -2147483638;
    private const int STG_E_ACCESSDENIED = -2147287035;
    private const int STG_E_INVALIDFLAG = -2147286785;
    private const int S_OK = 0;
    private const int S_FALSE = 1;
    private const int STG_E_TERMINATED = -2147286526;
    private const int STG_E_READFAULT = -2147287010;
    private const int STG_E_REVERTED = -2147286782;
    private const int STG_E_INVALIDPOINTER = -2147287031;
    private const int STG_E_NOMOREFILES = -2147287022;
    private const int STG_E_FILENOTFOUND = -2147287038;
    private const int STG_E_INCOMPLETE = -2147286527;
    private static int pOpenCount;
    private Stream pStream;
    private string pName;
    private ResourceInfo pResourceInfo;
    private int pSeekPointer;
    private int pDisposed;
    private bool pFinished;
    private System.Runtime.InteropServices.ComTypes.STATSTG pStatstg;
    private object pLock;
    private FsBase pClient;
    private ErrorPromptManager pErrorManager;
    private List<OleStream> pClonelist;

    public static int OpenCount
    {
      get
      {
        return OleStream.pOpenCount;
      }
    }

    public event EventHandler<ExceptionOccurredEventArgs> ExceptionOccurred;

    public OleStream(ResourceInfo ri, string name, FsBase client, ErrorPromptManager errormanager)
    {
      this.pDisposed = 0;
      this.pResourceInfo = ri;
      this.pName = name;
      this.pStream = (Stream) null;
      this.pSeekPointer = 0;
      this.pFinished = false;
      this.pLock = RuntimeHelpers.GetObjectValue(new object());
      this.pClient = client;
      this.pErrorManager = errormanager;
      this.pClonelist = new List<OleStream>();
      this.pStatstg.type = 2;
      this.pStatstg.pwcsName = this.pName;
      this.pStatstg.cbSize = this.pResourceInfo.Size;
      this.pStatstg.mtime = this.ToFileTime(this.pResourceInfo.LastModifiedTime);
      this.pStatstg.ctime = this.ToFileTime(this.pResourceInfo.CreationTime);
      this.pStatstg.atime = this.ToFileTime(this.pResourceInfo.LastAccessTime);
      this.pStatstg.grfMode = 0;
      this.pStatstg.grfLocksSupported = 0;
      this.pStatstg.clsid = Guid.Empty;
      this.pStatstg.grfStateBits = 0;
      this.pStatstg.reserved = 0;
    }

    public FsBase Client
    {
      get
      {
        return this.pClient;
      }
    }

    [DebuggerStepThrough]
    public void IStreamLockRegion(long libOffset, long cb, int dwLockType)
    {
      Marshal.ThrowExceptionForHR(-2147483647);
    }

    [DebuggerStepThrough]
    public void IStreamUnlockRegion(long libOffset, long cb, int dwLockType)
    {
      Marshal.ThrowExceptionForHR(-2147483647);
    }

    [DebuggerStepThrough]
    public void IStreamWrite(byte[] pv, int cb, IntPtr pcbWritten)
    {
      Marshal.ThrowExceptionForHR(-2147483647);
    }

    [DebuggerStepThrough]
    public void IStreamCommit(int grfCommitFlags)
    {
      Marshal.ThrowExceptionForHR(-2147483647);
    }

    [DebuggerStepThrough]
    public void IStreamRevert()
    {
      Marshal.ThrowExceptionForHR(-2147483647);
    }

    [DebuggerStepThrough]
    public void IStreamSeek(long dlibMove, int dwOrigin, IntPtr plibNewPosition)
    {
      Marshal.ThrowExceptionForHR(-2147483647);
    }

    [DebuggerStepThrough]
    public void IStreamSetSize(long libNewSize)
    {
      Marshal.ThrowExceptionForHR(-2147483647);
    }

    [DebuggerStepThrough]
    public void IStreamCopyTo(IStream pstm, long cb, IntPtr pcbRead, IntPtr pcbWritten)
    {
      Marshal.ThrowExceptionForHR(-2147483647);
    }

    public void IStreamClone(ref IStream ppstm)
    {
      OleStream oleStream = new OleStream(this.pResourceInfo, this.pName, this.pClient, this.pErrorManager);
      oleStream.pLock = RuntimeHelpers.GetObjectValue(this.pLock);
      oleStream.ExceptionOccurredEvent = (EventHandler<ExceptionOccurredEventArgs>) this.ExceptionOccurredEvent.Clone();
      this.pClonelist.Add(oleStream);
      ppstm = (IStream) oleStream;
    }

    public void IStreamStat(ref System.Runtime.InteropServices.ComTypes.STATSTG statstg, int grfStatFlag)
    {
      switch (grfStatFlag)
      {
        case 0:
          statstg.pwcsName = this.pStatstg.pwcsName;
          goto case 1;
        case 1:
          statstg.type = this.pStatstg.type;
          statstg.cbSize = this.pStatstg.cbSize;
          statstg.mtime = this.pStatstg.mtime;
          statstg.ctime = this.pStatstg.ctime;
          statstg.atime = this.pStatstg.atime;
          statstg.grfMode = 0;
          statstg.grfLocksSupported = 0;
          statstg.clsid = Guid.Empty;
          statstg.grfStateBits = 0;
          statstg.reserved = 0;
          break;
        case 2:
          Marshal.ThrowExceptionForHR(-2147286785);
          goto case 1;
        default:
          Marshal.ThrowExceptionForHR(-2147286785);
          goto case 1;
      }
    }

    public void IStreamRead(byte[] pv, int cb, IntPtr pcbRead)
    {
      int num1 = 0;
      object pLock = this.pLock;
      ObjectFlowControl.CheckForSyncLockOnValueType(pLock);
      Monitor.Enter(pLock);
      try
      {
        if (this.pFinished)
        {
          if (!(pcbRead != IntPtr.Zero))
            return;
          Marshal.WriteInt32(pcbRead, num1);
        }
        else
        {
          if (Thread.VolatileRead(ref this.pDisposed) == 1)
          {
            if (pcbRead != IntPtr.Zero)
              Marshal.WriteInt32(pcbRead, num1);
            Marshal.ThrowExceptionForHR(-2147286526);
          }
          int retryminutes = 1;
label_9:
          while (this.pStream == null)
          {
            try
            {
              FsBase pClient = this.pClient;
              ResourceId id = this.pResourceInfo.Id;
              long start = 0;
              long length = -1;
              this.pStream = pClient.OpenRead(id, ref start, ref length);
              this.pSeekPointer = 0;
            }
            catch (Exception ex1)
            {
              ProjectData.SetProjectError(ex1);
              Exception ex2 = ex1;
              this.pStream = (Stream) null;
              if (pcbRead != IntPtr.Zero)
                Marshal.WriteInt32(pcbRead, num1);
              ErrorAction errorAction;
              if (this.pErrorManager.IgnoreAll())
              {
                errorAction = ErrorAction.Ignore;
              }
              else
              {
                ExceptionOccurredEventArgs e = new ExceptionOccurredEventArgs("Error occurred during downloading file.", this.pResourceInfo.Id.ToString(), ErrorPromptType.IgnoreAllIgnoreRetryCancel, ex2, retryminutes);
                EventHandler<ExceptionOccurredEventArgs> exceptionOccurredEvent = this.ExceptionOccurredEvent;
                if (exceptionOccurredEvent != null)
                  exceptionOccurredEvent((object) this, e);
                this.pErrorManager.RegisterAction(e.Result);
                errorAction = e.Result.Action;
              }
              switch (errorAction)
              {
                case ErrorAction.Ignore:
                  this.Dispose();
                  throw new COMException("", 1);
                case ErrorAction.Retry:
                  ProjectData.ClearProjectError();
                  continue;
                case ErrorAction.AutoRetry:
                  checked { retryminutes *= 2; }
                  ProjectData.ClearProjectError();
                  continue;
                case ErrorAction.Cancel:
                  Marshal.ThrowExceptionForHR(-2147286526);
                  ProjectData.ClearProjectError();
                  break;
                default:
                  throw;
              }
            }
            Interlocked.Increment(ref OleStream.pOpenCount);
            break;
          }
          while (num1 < cb)
          {
            int num2;
            try
            {
              num2 = this.pStream.Read(pv, num1, checked (cb - num1));
            }
            catch (Exception ex1)
            {
              ProjectData.SetProjectError(ex1);
              Exception ex2 = ex1;
              try
              {
                this.pStream.Close();
              }
              catch (Exception ex3)
              {
                ProjectData.SetProjectError(ex3);
                ProjectData.ClearProjectError();
              }
              Interlocked.Decrement(ref OleStream.pOpenCount);
              this.pStream = (Stream) null;
              if (pcbRead != IntPtr.Zero)
                Marshal.WriteInt32(pcbRead, num1);
              ErrorAction errorAction;
              if (this.pErrorManager.IgnoreAll())
              {
                errorAction = ErrorAction.Ignore;
              }
              else
              {
                ExceptionOccurredEventArgs e = new ExceptionOccurredEventArgs("Error occurred during downloading file.", this.pResourceInfo.Id.ToString(), ErrorPromptType.IgnoreAllIgnoreRetryCancel, ex2, retryminutes);
                EventHandler<ExceptionOccurredEventArgs> exceptionOccurredEvent = this.ExceptionOccurredEvent;
                if (exceptionOccurredEvent != null)
                  exceptionOccurredEvent((object) this, e);
                this.pErrorManager.RegisterAction(e.Result);
                errorAction = e.Result.Action;
              }
              switch (errorAction)
              {
                case ErrorAction.Ignore:
                  this.Dispose();
                  throw new COMException("", 1);
                case ErrorAction.Retry:
                  ProjectData.ClearProjectError();
                  goto label_9;
                case ErrorAction.AutoRetry:
                  checked { retryminutes *= 2; }
                  ProjectData.ClearProjectError();
                  goto label_9;
                case ErrorAction.Cancel:
                  Marshal.ThrowExceptionForHR(-2147286526);
                  ProjectData.ClearProjectError();
                  break;
                default:
                  throw;
              }
            }
            checked { num1 += num2; }
            this.pSeekPointer = checked (this.pSeekPointer + num2);
            if ((long) this.pSeekPointer != this.pStatstg.cbSize)
            {
              if (this.pStatstg.cbSize < 0L)
              {
                if (num2 == 0)
                  goto label_45;
              }
              if (num2 == 0)
              {
                if ((long) this.pSeekPointer < this.pStatstg.cbSize)
                {
                  ErrorAction errorAction;
                  if (this.pErrorManager.IgnoreAll())
                  {
                    errorAction = ErrorAction.Ignore;
                  }
                  else
                  {
                    ExceptionOccurredEventArgs e = new ExceptionOccurredEventArgs("Error occurred during downloading file.", this.pResourceInfo.Id.ToString(), ErrorPromptType.IgnoreAllIgnoreRetryCancel, (Exception) new IOException("unexpected close of stream"), retryminutes);
                    EventHandler<ExceptionOccurredEventArgs> exceptionOccurredEvent = this.ExceptionOccurredEvent;
                    if (exceptionOccurredEvent != null)
                      exceptionOccurredEvent((object) this, e);
                    this.pErrorManager.RegisterAction(e.Result);
                    errorAction = e.Result.Action;
                  }
                  switch (errorAction)
                  {
                    case ErrorAction.Ignore:
                      this.Dispose();
                      throw new COMException("", 1);
                    case ErrorAction.Retry:
                      goto label_9;
                    case ErrorAction.AutoRetry:
                      checked { retryminutes *= 2; }
                      goto label_9;
                    case ErrorAction.Cancel:
                      Marshal.ThrowExceptionForHR(-2147286526);
                      continue;
                    default:
                      throw new Exception();
                  }
                }
                else
                {
                  Marshal.ThrowExceptionForHR(-2147287010);
                  continue;
                }
              }
              else
                continue;
            }
label_45:
            try
            {
              this.pStream.Close();
            }
            catch (Exception ex)
            {
              ProjectData.SetProjectError(ex);
              ProjectData.ClearProjectError();
            }
            Interlocked.Decrement(ref OleStream.pOpenCount);
            this.pStream = (Stream) null;
            this.pFinished = true;
            break;
          }
          if (!(pcbRead != IntPtr.Zero))
            return;
          Marshal.WriteInt32(pcbRead, num1);
        }
      }
      finally
      {
        Monitor.Exit(pLock);
      }
    }

    protected virtual void Dispose(bool disposing)
    {
      if (Interlocked.CompareExchange(ref this.pDisposed, 1, 0) != 0 || !disposing)
        return;
      object pLock = this.pLock;
      ObjectFlowControl.CheckForSyncLockOnValueType(pLock);
      Monitor.Enter(pLock);
      try
      {
        if (this.pStream != null)
        {
          try
          {
            this.pStream.Close();
          }
          catch (Exception ex)
          {
            ProjectData.SetProjectError(ex);
            ProjectData.ClearProjectError();
          }
          Interlocked.Decrement(ref OleStream.pOpenCount);
          this.pStream = (Stream) null;
        }
        List<OleStream>.Enumerator enumerator;
        try
        {
          enumerator = this.pClonelist.GetEnumerator();
          while (enumerator.MoveNext())
          {
            OleStream current = enumerator.Current;
            try
            {
              current.Dispose();
            }
            catch (Exception ex)
            {
              ProjectData.SetProjectError(ex);
              ProjectData.ClearProjectError();
            }
          }
        }
        finally
        {
          enumerator.Dispose();
        }
      }
      finally
      {
        Monitor.Exit(pLock);
      }
    }

    public void Dispose()
    {
      this.Dispose(true);
      GC.SuppressFinalize((object) this);
    }

    ~OleStream()
    {
      this.Dispose(false);
      // ISSUE: explicit finalizer call
      base.Finalize();
    }

    private System.Runtime.InteropServices.ComTypes.FILETIME ToFileTime(DateTime time)
    {
      byte[] bytes = BitConverter.GetBytes(DateTime.Compare(time, OleStream.win32timeorigin) >= 0 ? time.ToFileTime() : 0L);
      System.Runtime.InteropServices.ComTypes.FILETIME filetime;
      filetime.dwHighDateTime = BitConverter.ToInt32(bytes, 4);
      filetime.dwLowDateTime = BitConverter.ToInt32(bytes, 0);
      return filetime;
    }

    private enum STATFLAG
    {
      STATFLAG_DEFAULT,
      STATFLAG_NONAME,
      STATFLAG_NOOPEN,
    }

    [Flags]
    private enum LOCKTYPE
    {
      LOCK_WRITE = 1,
      LOCK_EXCLUSIVE = 2,
      LOCK_ONLYONCE = 4,
    }
  }
}