author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 01:11:40 +0200 | |
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permissions | -rw-r--r-- |
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// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// |
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/** |
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@file |
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@publishedAll |
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@released |
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*/ |
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#ifndef __OBEXOBJECTS_H |
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#define __OBEXOBJECTS_H |
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|
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#include <obextypes.h> |
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#include <obexbaseobject.h> |
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#include <f32file.h> |
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|
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class MObexFileWriter; |
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class TObexBufferingDetails; |
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|
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/** |
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This class is a concrete derivation of the CObexBaseObject class. Use it to |
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store and transfer OBEX objects with the body part stored in an EPOC file. |
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Hence this class is particularly suited to OBEX "file" beaming applications |
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(c.f. arbitrary object beaming), although there is in reality no |
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restriction in what it is used to transfer. Access to the body is acheived |
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through an additional attribute to the object; the data file. This is the |
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file-system name of the file used to store the body of the object. Note |
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that there is no explicit relation between this and the Name of the object, |
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although it is expected that most applications would attempt to relate the |
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two. |
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|
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When ever a valid data file is set (i.e. DataFile().Length > 0), this file |
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is effectively open, hence stopping any other application from opening it |
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with exclusive rights. Therefore, it is recommended that Reset () be called |
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on the object as soon as it is no longer required, and definitely before |
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(conceptually) passing ownership of the data file to any other object or |
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user. |
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|
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CObexFileObject is also suited to situations where an object is expected to |
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be received, but no information about the purpose of this object is known. |
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This is due to CObexFileObject’s ability to create temporary files "on the |
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fly" to store received data into, when a specific file is not provided by |
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the application. |
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This class is not designed for user derivation. |
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@publishedAll |
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@released |
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*/ |
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NONSHARABLE_CLASS(CObexFileObject) : public CObexBaseObject |
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{ |
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public: |
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static IMPORT_C CObexFileObject* NewL(); |
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static IMPORT_C CObexFileObject* NewL(const TDesC &aDataFile); |
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virtual IMPORT_C ~CObexFileObject(); |
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IMPORT_C void InitFromFileL(const TDesC& aFile); |
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private: |
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void ConstructL(const TDesC &aDataFile); |
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void SetDataFileL(const TDesC& aDesc); |
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const TDesC& DataFile(); |
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TBool RenameFile(const TDesC& aDesC); |
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void SetTempFilePath(const TDesC& aPath); |
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void QueryTempFilePath(TDes& aPath); |
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// From CObexBaseObject |
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virtual void GetData(TInt aPos, TDes8& aDes); |
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virtual void NewData(TInt aPos, TDes8& aDes); |
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virtual TInt DataSize(); |
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virtual void ResetData(); |
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// Data |
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private: |
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RFs iFs; |
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TParse iDataFile; |
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RFile iFile; |
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TBuf<KObexObjectDescriptionSize> iTempFilePath; |
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}; |
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/** |
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Use this class to hold objects where the body part is stored in a CBufFlat |
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object. Please note that although parameters are supplied as CBufBase objects, |
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non-CBufFlat parameters are not supported and will have unpredictable results. |
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At no point does the CObexBufObject create, or take ownership of any CBaseBuf |
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object it uses - it is always the responsibility of the creator/owner of the |
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CBaseBuf to free it when no longer required. |
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As this class does not take ownership of the buffers it uses, it equally can |
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not create its own buffers ad-hoc for storing new data into. Hence at no |
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time is it valid for a CObexBufObject to exist with out it having a valid |
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data buffer set. If such a situation arises, where it is required that |
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received information should be discarded, consider using a CObexNullObject. |
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105 |
|
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It is also posible to supply a file instead of a memory buffer, or to supply |
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both. This functionality is due to the MObexServerNotify class expecting to |
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work only on CObexBufObjects, so CObexFileObjects cannot be returned from the |
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upcalls. |
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To use a file for body storage, call NewL() passing in a NULL pointer, then |
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call SetDataBufL() manually afterwards. There are three overloads---to allow |
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purely memory based objects, purely file based, or a hybrid. The hybrid object |
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buffers into a memory buffer (which is not allowed to grow), then writes data |
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to the file when the buffer is full. The buffering behaviour can therefore be |
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tuned to the application by setting the size of the buffer prior to use. |
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116 |
|
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This class is not designed for user derivation. |
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118 |
|
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119 |
@publishedAll |
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@released |
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*/ |
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NONSHARABLE_CLASS(CObexBufObject) : public CObexBaseObject |
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123 |
{ |
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124 |
public: |
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/** |
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Obex file buffering method. |
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127 |
|
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128 |
@publishedAll |
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@released |
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*/ |
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enum TFileBuffering |
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132 |
{ |
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/** Only the supplied buffer will be used to buffer file writes. */ |
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134 |
ESingleBuffering, |
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/** The object will create a second buffer and perform double buffering. */ |
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136 |
EDoubleBuffering |
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}; |
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138 |
|
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139 |
public: |
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static IMPORT_C CObexBufObject* NewL(CBufBase* aDataBuf); |
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virtual IMPORT_C ~CObexBufObject(); |
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IMPORT_C TInt WriteToFile(const TPtrC& aFileName); |
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143 |
|
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IMPORT_C void SetDataBufL(TObexBufferingDetails& aDetails); |
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IMPORT_C void SetDataBufL(CBufBase* aDataBuf); |
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IMPORT_C void SetDataBufL(const TPtrC& aFilename); |
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IMPORT_C void SetDataBufL(const TPtrC& aFilename, CBufBase* aDataBuf); |
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IMPORT_C void SetDataBufL(const TPtrC& aFilename, CBufBase& aDataBuf, const TFileBuffering aBufferingStrategy); |
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IMPORT_C CBufBase* DataBuf(); |
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HBufC* FileName(); |
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151 |
|
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152 |
private: |
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CObexBufObject(); |
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void ConstructL(CBufBase* aDataBuf); |
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155 |
|
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void PrepareToSetBufferL(); |
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157 |
|
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void CopyFileL(const TDesC& aFilename); |
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TInt NewFileData(TInt aPos, TDes8& aDes); |
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void GetFileData(TInt aPos, TDes8& aDes); |
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161 |
|
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// From CObexBaseObject |
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virtual void GetData(TInt aPos, TDes8& aDes); |
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virtual void NewData(TInt aPos, TDes8& aDes); |
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virtual TInt DataSize(); |
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virtual void ResetData(); |
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167 |
|
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void CloseDataFile(); |
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TInt OpenDataFile(const TDesC& aFilename); |
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void CloseFileServer(); |
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TInt OpenFileServer(); |
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TInt WriteBufferToFile(TBool aFinal); |
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173 |
|
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// Data |
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175 |
private: |
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CBufBase* iBuf; |
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HBufC* iFilename; |
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RFs* iFileServ; |
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RFile* iFile; |
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TInt iBufOffset; |
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TInt iBuffered; |
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TInt iBufSegSize; |
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183 |
|
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// Added for double-buffering |
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private: |
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// Owned |
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MObexFileWriter* iWriter; |
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CBufBase* iDoubleBuf; |
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}; |
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|
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191 |
|
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192 |
|
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/** |
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Wraps parameters which can affect the buffering method used by the |
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CObexBufObject. |
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This version provides a single memory buffer which holds the entire object. |
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Subclasses will always use a memory buffer, but can override the way that |
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Obex uses it. |
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199 |
|
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@publishedAll |
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@released |
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*/ |
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NONSHARABLE_CLASS(TObexBufferingDetails) |
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{ |
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public: |
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/** |
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Versions (subclasses) of the buffering style object. |
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This enum should not be used outside the dll. |
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@internalComponent |
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*/ |
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enum TVersion |
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{ |
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EBasicBuffer, |
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EPureFile, |
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EFilenameBackedBuffer, |
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ERFileBackedBuffer, |
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ELastVersion |
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}; |
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|
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IMPORT_C TObexBufferingDetails(CBufBase& aBuffer); |
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221 |
|
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TVersion Version(); // Return the version of this object |
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CBufBase* Buffer(); |
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|
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protected: |
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TObexBufferingDetails(TVersion aVersion, CBufBase* aBuffer); |
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|
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private: |
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TVersion iVersion; |
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CBufBase* iBuffer; |
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|
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// This data padding has been added to help prevent future binary compatibility breaks |
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// Neither iPadding1 nor iPadding2 have been zero'd because they are currently not used |
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TUint32 iPadding1; |
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TUint32 iPadding2; |
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}; |
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|
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|
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/** |
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Provides alternate behaviour for a CObexBufObject, allowing use of a file |
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to hold the object in its entirety. No memory buffer is used. This is a |
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special case option provided to cater for the MObexServerNotify interface |
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which requires the use of CObexBufObject objects. It is generally better to |
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use a buffered variant. |
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|
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@publishedAll |
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@released |
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*/ |
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NONSHARABLE_CLASS(TObexPureFileBuffer) : public TObexBufferingDetails |
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{ |
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public: |
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IMPORT_C TObexPureFileBuffer(const TPtrC& aFilename); |
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const TPtrC& Filename(); |
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|
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private: |
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const TPtrC& iFilename; |
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|
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// This data padding has been added to help prevent future binary compatibility breaks |
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// Neither iPadding1 nor iPadding2 have been zero'd because they are currently not used |
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TUint32 iPadding1; |
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TUint32 iPadding2; |
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}; |
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|
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/** |
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Provides alternate behaviour for a CObexBufObject, allowing use of a file |
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to hold the object in its entirety. Writes to this object are buffered through |
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the supplied CBufBase derived object, which is never enlarged. Once |
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it is full, the data is flushed to the file. |
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|
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@publishedAll |
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@released |
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*/ |
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NONSHARABLE_CLASS(TObexFilenameBackedBuffer) : public TObexBufferingDetails |
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{ |
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public: |
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IMPORT_C TObexFilenameBackedBuffer(CBufBase& aBuffer, const TPtrC& aFilename, CObexBufObject::TFileBuffering aBufferingStrategy); |
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const TPtrC& Filename(); |
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CObexBufObject::TFileBuffering Strategy(); |
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|
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private: |
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const TPtrC& iFilename; |
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CObexBufObject::TFileBuffering iBufferingStrategy; |
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|
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// This data padding has been added to help prevent future binary compatibility breaks |
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// Neither iPadding1 nor iPadding2 have been zero'd because they are currently not used |
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TUint32 iPadding1; |
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TUint32 iPadding2; |
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}; |
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|
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|
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|
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/** |
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Provides alternate behaviour for a CObexBufObject, allowing use of a file |
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to hold the object in its entirety. Writes to this object are buffered through |
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the supplied CBufBase derived object, which is never enlarged. Once |
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it is full, the data is flushed to the file. |
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|
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@publishedAll |
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@released |
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*/ |
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NONSHARABLE_CLASS(TObexRFileBackedBuffer) : public TObexBufferingDetails |
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{ |
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public: |
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IMPORT_C TObexRFileBackedBuffer(CBufBase& aBuffer, RFile aFile, CObexBufObject::TFileBuffering aBufferingStrategy); |
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RFile File(); |
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CObexBufObject::TFileBuffering Strategy(); |
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|
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private: |
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RFile iFile; |
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CObexBufObject::TFileBuffering iBufferingStrategy; |
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// This data padding has been added to help prevent future binary compatibility breaks |
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// Neither iPadding1 nor iPadding2 have been zero'd because they are currently not used |
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TUint32 iPadding1; |
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TUint32 iPadding2; |
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}; |
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/** |
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Concrete OBEX object with NULL data representation. Use when only the |
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headers of an object are required, and the data (if any) can safely be |
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discarded. |
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@publishedAll |
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@released |
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*/ |
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NONSHARABLE_CLASS(CObexNullObject) : public CObexBaseObject |
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{ |
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public: |
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IMPORT_C static CObexNullObject* NewL (); |
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private: |
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// From CObexBaseObject |
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void ConstructL(); |
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virtual void GetData (TInt aPos, TDes8& aDes); |
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virtual void NewData (TInt aPos, TDes8& aDes); |
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virtual TInt DataSize (); |
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virtual void ResetData (); |
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}; |
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|
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#endif // __OBEXOBJECTS_H |