Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / MS / Internal / IO / Zip / ZipIORawDataFileBlock.cs / 1305600 / ZipIORawDataFileBlock.cs
//------------------------------------------------------------------------------
//------------- *** WARNING ***
//------------- This file is part of a legally monitored development project.
//------------- Do not check in changes to this project. Do not raid bugs on this
//------------- code in the main PS database. Do not contact the owner of this
//------------- code directly. Contact the legal team at ‘ZSLegal’ for assistance.
//------------- *** WARNING ***
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//
// Description:
// This is an internal class that enables interactions with Zip archives
// for OPC scenarios
//
// History:
// 11/19/2004: IgorBel: Initial creation.
//
//-----------------------------------------------------------------------------
using System;
using System.IO;
using System.Diagnostics;
using System.Collections;
using System.Runtime.Serialization;
using System.Windows;
using MS.Internal.IO.Packaging; // for PackagingUtilities
namespace MS.Internal.IO.Zip
{
internal class ZipIORawDataFileBlock : IZipIOBlock
{
//------------------------------------------------------
//
// Public Properties
//
//-----------------------------------------------------
// standard IZipIOBlock functionality
public long Offset
{
get
{
return _offset;
}
}
public long Size
{
get
{
return _size;
}
}
public bool GetDirtyFlag(bool closingFlag)
{
return _dirtyFlag;
}
//------------------------------------------------------
//
// Public Methods
//
//------------------------------------------------------
public void Move(long shiftSize)
{
if (shiftSize != 0)
{
checked{_offset +=shiftSize;}
_dirtyFlag = true;
Debug.Assert(_offset >=0);
}
}
public void Save()
{
if(GetDirtyFlag(true)) // in case we do not know whether we are closing or not we should think we are closing as a more conservative approach
{
// we need to move the whole block to the new position
long moveBlockSourceOffset = _persistedOffset;
long moveBlockSize = _size;
long moveBlockTargetOffset = _offset;
if (_cachePrefixStream != null)
{
// if we have something in cache we only should move whatever isn't cached
checked{moveBlockSourceOffset += _cachePrefixStream.Length;}
checked{moveBlockTargetOffset += _cachePrefixStream.Length;}
checked{moveBlockSize -= _cachePrefixStream.Length;}
Debug.Assert(moveBlockSize >=0);
}
_blockManager.MoveData(moveBlockSourceOffset, moveBlockTargetOffset, moveBlockSize);
// only after data on disk was moved it is safe to flush the cached prefix buffer
if (_cachePrefixStream != null)
{
if (_blockManager.Stream.Position != _offset)
{
// we need to seek
_blockManager.Stream.Seek(_offset, SeekOrigin.Begin);
}
Debug.Assert(_cachePrefixStream.Length > 0); // should be taken care of by the constructor
// and PreSaveNotification
// we do not need to flush here because Block Manager is responsible for flushing
// this in it's Save method
_cachePrefixStream.WriteToStream(_blockManager.Stream);
// we can free the memory
_cachePrefixStream.Close();
_cachePrefixStream = null;
}
// we are not shifted between on disk image and in memory image any more
_persistedOffset = _offset;
_dirtyFlag = false;
}
}
public void UpdateReferences(bool closingFlag)
{
// this block doesn't have external references so there is nothing we need to do here
}
public PreSaveNotificationScanControlInstruction PreSaveNotification(long offset, long size)
{
return ZipIOBlockManager.CommonPreSaveNotificationHandler(
_blockManager.Stream,
offset, size,
_persistedOffset, _size,
ref _cachePrefixStream);
}
//-----------------------------------------------------
//
// Internal Properties
//
//------------------------------------------------------
internal long DiskImageShift
{
get
{
return _offset - _persistedOffset;
}
}
//-----------------------------------------------------
//
// Internal Methods
//
//-----------------------------------------------------
internal static ZipIORawDataFileBlock Assign(ZipIOBlockManager blockManager, long offset, long size)
{
if (size <= 0)
{
throw new ArgumentOutOfRangeException ("size");
}
if (offset < 0)
{
throw new ArgumentOutOfRangeException ("offset");
}
ZipIORawDataFileBlock block = new ZipIORawDataFileBlock(blockManager);
block._persistedOffset = offset;
block._offset = offset;
block._size = size;
return block;
}
internal bool DiskImageContains(IZipIOBlock block)
{
checked
{
Debug.Assert(block != null);
Debug.Assert(block.Offset >=0);
Debug.Assert(block.Size > 0);
return (_persistedOffset <= block.Offset) &&
(_persistedOffset + _size >= block.Offset +block.Size);
}
}
internal bool DiskImageContains(long offset)
{
checked
{
Debug.Assert(offset >=0);
return (_persistedOffset <= offset) && (_persistedOffset + _size > offset);
}
}
internal void SplitIntoPrefixSuffix(IZipIOBlock block,
out ZipIORawDataFileBlock prefixBlock, out ZipIORawDataFileBlock suffixBlock)
{
// assert that current's block cache isn't loaded, if it is
// we probably missed an opportunity to used this cache in order to parse the new block
// and it might be based on the overriden data on disk
// This block can only be in cached state as a part of single BlockManager.Save execution.
// It can NOT be in cached state prior to BlockManager.Save function entry or after
// BlockManager.Save execution completed
Debug.Assert(_cachePrefixStream == null);
// Assert that block is containe inside the current raw block
Debug.Assert(DiskImageContains(block));
checked
{
prefixBlock = null;
suffixBlock = null;
if (block.Offset > _persistedOffset)
{
// we have a new non empty prefix;
long newBlockOffset = _persistedOffset;
long newBlockSize = block.Offset - _persistedOffset;
prefixBlock = Assign(_blockManager, newBlockOffset , newBlockSize);
}
if (block.Offset + block.Size < _persistedOffset + _size)
{
// we have a new non empty suffix;
long newBlockOffset = block.Offset + block.Size;
long newBlockSize = _persistedOffset + _size - newBlockOffset;
suffixBlock = Assign(_blockManager, newBlockOffset, newBlockSize);
}
}
}
//-----------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
private ZipIORawDataFileBlock(ZipIOBlockManager blockManager)
{
_blockManager = blockManager;
}
//-----------------------------------------------------
//
// Private Members
//
//------------------------------------------------------
private SparseMemoryStream _cachePrefixStream = null;
private ZipIOBlockManager _blockManager;
private long _persistedOffset;
private long _offset;
private long _size;
private bool _dirtyFlag;
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
//------------- *** WARNING ***
//------------- This file is part of a legally monitored development project.
//------------- Do not check in changes to this project. Do not raid bugs on this
//------------- code in the main PS database. Do not contact the owner of this
//------------- code directly. Contact the legal team at ‘ZSLegal’ for assistance.
//------------- *** WARNING ***
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//
// Description:
// This is an internal class that enables interactions with Zip archives
// for OPC scenarios
//
// History:
// 11/19/2004: IgorBel: Initial creation.
//
//-----------------------------------------------------------------------------
using System;
using System.IO;
using System.Diagnostics;
using System.Collections;
using System.Runtime.Serialization;
using System.Windows;
using MS.Internal.IO.Packaging; // for PackagingUtilities
namespace MS.Internal.IO.Zip
{
internal class ZipIORawDataFileBlock : IZipIOBlock
{
//------------------------------------------------------
//
// Public Properties
//
//-----------------------------------------------------
// standard IZipIOBlock functionality
public long Offset
{
get
{
return _offset;
}
}
public long Size
{
get
{
return _size;
}
}
public bool GetDirtyFlag(bool closingFlag)
{
return _dirtyFlag;
}
//------------------------------------------------------
//
// Public Methods
//
//------------------------------------------------------
public void Move(long shiftSize)
{
if (shiftSize != 0)
{
checked{_offset +=shiftSize;}
_dirtyFlag = true;
Debug.Assert(_offset >=0);
}
}
public void Save()
{
if(GetDirtyFlag(true)) // in case we do not know whether we are closing or not we should think we are closing as a more conservative approach
{
// we need to move the whole block to the new position
long moveBlockSourceOffset = _persistedOffset;
long moveBlockSize = _size;
long moveBlockTargetOffset = _offset;
if (_cachePrefixStream != null)
{
// if we have something in cache we only should move whatever isn't cached
checked{moveBlockSourceOffset += _cachePrefixStream.Length;}
checked{moveBlockTargetOffset += _cachePrefixStream.Length;}
checked{moveBlockSize -= _cachePrefixStream.Length;}
Debug.Assert(moveBlockSize >=0);
}
_blockManager.MoveData(moveBlockSourceOffset, moveBlockTargetOffset, moveBlockSize);
// only after data on disk was moved it is safe to flush the cached prefix buffer
if (_cachePrefixStream != null)
{
if (_blockManager.Stream.Position != _offset)
{
// we need to seek
_blockManager.Stream.Seek(_offset, SeekOrigin.Begin);
}
Debug.Assert(_cachePrefixStream.Length > 0); // should be taken care of by the constructor
// and PreSaveNotification
// we do not need to flush here because Block Manager is responsible for flushing
// this in it's Save method
_cachePrefixStream.WriteToStream(_blockManager.Stream);
// we can free the memory
_cachePrefixStream.Close();
_cachePrefixStream = null;
}
// we are not shifted between on disk image and in memory image any more
_persistedOffset = _offset;
_dirtyFlag = false;
}
}
public void UpdateReferences(bool closingFlag)
{
// this block doesn't have external references so there is nothing we need to do here
}
public PreSaveNotificationScanControlInstruction PreSaveNotification(long offset, long size)
{
return ZipIOBlockManager.CommonPreSaveNotificationHandler(
_blockManager.Stream,
offset, size,
_persistedOffset, _size,
ref _cachePrefixStream);
}
//-----------------------------------------------------
//
// Internal Properties
//
//------------------------------------------------------
internal long DiskImageShift
{
get
{
return _offset - _persistedOffset;
}
}
//-----------------------------------------------------
//
// Internal Methods
//
//-----------------------------------------------------
internal static ZipIORawDataFileBlock Assign(ZipIOBlockManager blockManager, long offset, long size)
{
if (size <= 0)
{
throw new ArgumentOutOfRangeException ("size");
}
if (offset < 0)
{
throw new ArgumentOutOfRangeException ("offset");
}
ZipIORawDataFileBlock block = new ZipIORawDataFileBlock(blockManager);
block._persistedOffset = offset;
block._offset = offset;
block._size = size;
return block;
}
internal bool DiskImageContains(IZipIOBlock block)
{
checked
{
Debug.Assert(block != null);
Debug.Assert(block.Offset >=0);
Debug.Assert(block.Size > 0);
return (_persistedOffset <= block.Offset) &&
(_persistedOffset + _size >= block.Offset +block.Size);
}
}
internal bool DiskImageContains(long offset)
{
checked
{
Debug.Assert(offset >=0);
return (_persistedOffset <= offset) && (_persistedOffset + _size > offset);
}
}
internal void SplitIntoPrefixSuffix(IZipIOBlock block,
out ZipIORawDataFileBlock prefixBlock, out ZipIORawDataFileBlock suffixBlock)
{
// assert that current's block cache isn't loaded, if it is
// we probably missed an opportunity to used this cache in order to parse the new block
// and it might be based on the overriden data on disk
// This block can only be in cached state as a part of single BlockManager.Save execution.
// It can NOT be in cached state prior to BlockManager.Save function entry or after
// BlockManager.Save execution completed
Debug.Assert(_cachePrefixStream == null);
// Assert that block is containe inside the current raw block
Debug.Assert(DiskImageContains(block));
checked
{
prefixBlock = null;
suffixBlock = null;
if (block.Offset > _persistedOffset)
{
// we have a new non empty prefix;
long newBlockOffset = _persistedOffset;
long newBlockSize = block.Offset - _persistedOffset;
prefixBlock = Assign(_blockManager, newBlockOffset , newBlockSize);
}
if (block.Offset + block.Size < _persistedOffset + _size)
{
// we have a new non empty suffix;
long newBlockOffset = block.Offset + block.Size;
long newBlockSize = _persistedOffset + _size - newBlockOffset;
suffixBlock = Assign(_blockManager, newBlockOffset, newBlockSize);
}
}
}
//-----------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
private ZipIORawDataFileBlock(ZipIOBlockManager blockManager)
{
_blockManager = blockManager;
}
//-----------------------------------------------------
//
// Private Members
//
//------------------------------------------------------
private SparseMemoryStream _cachePrefixStream = null;
private ZipIOBlockManager _blockManager;
private long _persistedOffset;
private long _offset;
private long _size;
private bool _dirtyFlag;
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DataGridView.cs
- DeviceContext.cs
- ListItemsCollectionEditor.cs
- XpsSerializationManagerAsync.cs
- CfgParser.cs
- Style.cs
- ToolStripItemClickedEventArgs.cs
- SessionState.cs
- InfoCardRequestException.cs
- HttpClientChannel.cs
- EllipseGeometry.cs
- XmlNamedNodeMap.cs
- AppSecurityManager.cs
- TextDecoration.cs
- EastAsianLunisolarCalendar.cs
- FakeModelPropertyImpl.cs
- ToolZone.cs
- ZipPackage.cs
- PerfCounters.cs
- XmlUtilWriter.cs
- PropertyGrid.cs
- MetaModel.cs
- ScrollBarRenderer.cs
- PersonalizationEntry.cs
- NetNamedPipeSecurity.cs
- NullableConverter.cs
- PropertyItem.cs
- AuthorizationSection.cs
- Context.cs
- SchemaImporterExtensionsSection.cs
- HostProtectionPermission.cs
- BlurBitmapEffect.cs
- LazyTextWriterCreator.cs
- BuildManager.cs
- SystemWebSectionGroup.cs
- ObjectView.cs
- MethodAccessException.cs
- IgnoreFileBuildProvider.cs
- Guid.cs
- DesignerDeviceConfig.cs
- followingsibling.cs
- ThicknessAnimationUsingKeyFrames.cs
- BindValidator.cs
- ProviderCommandInfoUtils.cs
- InlineObject.cs
- BindingObserver.cs
- DataGridViewRowHeaderCell.cs
- StickyNote.cs
- LostFocusEventManager.cs
- TypeSource.cs
- GenerateTemporaryTargetAssembly.cs
- URLAttribute.cs
- MasterPageCodeDomTreeGenerator.cs
- LineServicesCallbacks.cs
- SoapSchemaMember.cs
- ToolStripCustomTypeDescriptor.cs
- OutputCacheSettingsSection.cs
- ProtectedConfigurationSection.cs
- StringAnimationBase.cs
- CodeCastExpression.cs
- AuthenticationException.cs
- PersonalizableTypeEntry.cs
- Rotation3DAnimation.cs
- RequestSecurityTokenResponse.cs
- XmlnsCache.cs
- StrongNameIdentityPermission.cs
- XAMLParseException.cs
- CompilationPass2TaskInternal.cs
- WindowsStartMenu.cs
- HttpWebRequestElement.cs
- EllipticalNodeOperations.cs
- ScriptRegistrationManager.cs
- XmlMtomWriter.cs
- DataGridItem.cs
- Renderer.cs
- MenuItem.cs
- SQLString.cs
- EntitySqlQueryCacheEntry.cs
- RepeatButton.cs
- MarkupExtensionParser.cs
- QualifiedCellIdBoolean.cs
- NativeMethods.cs
- Int64Converter.cs
- Clause.cs
- IPipelineRuntime.cs
- ViewValidator.cs
- SectionInput.cs
- CustomErrorsSection.cs
- DuplicateContext.cs
- FormatConvertedBitmap.cs
- MailSettingsSection.cs
- DataGridViewColumn.cs
- Array.cs
- AccessKeyManager.cs
- ExpressionBindingCollection.cs
- ChtmlTextWriter.cs
- SiteMapNodeItem.cs
- XmlFormatMapping.cs
- BindingFormattingDialog.cs
- ValidatingReaderNodeData.cs