author | hgs |
Wed, 13 Oct 2010 19:39:18 +0530 | |
changeset 71 | 28ccaba883f4 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
0
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// Copyright (c) 2005-2009 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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// Name : UDIRECTORYDESC.CPP |
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// Part of : LIBC |
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// Contains the source for the CDirectoryDesc Class |
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// Version : 1.0 |
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// |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <sys/stat.h> |
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#include "fdesc.h" |
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#include "lposix.h" |
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|
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/* |
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Dirent Structure |
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*/ |
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struct TDirent |
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{ |
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TUint32 iEntryNum; |
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TUint16 iRecLen; |
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TUint8 iEntryType; |
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TUint8 iNameLen; |
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char iEntryName[KMaxFileName+1]; |
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}; |
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|
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// ----------------------------------------------------------------------------- |
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// CDirectoryDesc::CDirectoryDesc : Constructer |
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// Constructs Directory Descriptor |
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// ----------------------------------------------------------------------------- |
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CDirectoryDesc::CDirectoryDesc() |
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{ |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// CDirectoryDesc::CDirectoryDesc : Constructer |
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// Destructor for Directory Descriptor |
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// ----------------------------------------------------------------------------- |
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CDirectoryDesc::~CDirectoryDesc() |
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{ |
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iDir.Close(); |
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} |
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// ----------------------------------------------------------------------------- |
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// CDirectoryDesc::Open |
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// Constructs Directory Descriptor |
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// ----------------------------------------------------------------------------- |
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TInt CDirectoryDesc::Open(RFs& aSession, const TDesC& aName, int mode, int /*perms*/) |
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{ |
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//Save name of the directory |
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iDirName = aName; |
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TFileName folderName(aName); |
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//Check whether dir name is appended with \ or not |
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TPtrC right = folderName.Right(1); |
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_LIT(KSlash, "\\"); |
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if( right != KSlash) |
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{ |
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folderName.Append(KSlash); |
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} |
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TInt err = KErrDirectoryOpen; |
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if( mode == O_RDONLY ) |
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{ |
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err = iDir.Open( aSession, folderName, KEntryAttMaskSupported); |
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iFcntlFlag = mode & O_ACCMODE; |
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} |
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return err; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// CDirectoryDesc::Read : Reading from a Directory |
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// ----------------------------------------------------------------------------- |
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void CDirectoryDesc::Read(TDes8& aDesc, TRequestStatus& aStatus) |
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{ |
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TInt errorNum = KErrNone; |
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const TInt16 KDirentSize = 8; |
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TInt readLen = aDesc.MaxLength(); |
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TUint8* bufPtr = const_cast<TUint8*>(aDesc.Ptr()); |
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TInt copiedInfo = 0; |
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TEntryArray entries; |
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errorNum = iDir.Read( entries ); |
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TDirent direntEntry; |
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|
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if (errorNum == KErrNone || errorNum == KErrEof) |
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{ |
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errorNum = KErrNone; |
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TEntry entry; |
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TInt len = 0; |
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TInt count = entries.Count(); |
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TBuf8<KMaxFileName> fileName; |
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TInt index = 0; |
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TInt copyLen = 0; |
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//Loop through each entry and get all the informations |
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for (; index<count && copiedInfo<readLen; index++, copiedInfo += copyLen) |
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108 |
{ |
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entry = entries[index]; |
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//Copy File's UID |
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TUid fileUID = entry.iType.MostDerived(); |
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direntEntry.iEntryNum = fileUID.iUid; |
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HBufC8 *name; |
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if(ConvertUnicodeToUtf8(entry.iName,name,errorNum) == -1) |
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115 |
{ |
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break; |
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} |
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//Copy entry type and record Length |
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fileName.Copy( name->Des() ); |
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delete name; |
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len = fileName.Length(); |
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direntEntry.iRecLen = KDirentSize + len + 1; |
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//Maintaing a four byte boundary. |
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direntEntry.iRecLen = Align4(direntEntry.iRecLen); |
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direntEntry.iEntryType = 0; |
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direntEntry.iNameLen = len; |
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//Copy entry name |
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Mem::Copy( direntEntry.iEntryName, fileName.PtrZ(), len+1); |
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129 |
|
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//Copy structure on to the buffer |
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copyLen = Min(direntEntry.iRecLen, (readLen - copiedInfo)); |
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Mem::Copy( bufPtr, &direntEntry, copyLen ); |
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bufPtr += copyLen; |
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} |
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135 |
} |
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136 |
|
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//Set the Length |
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aDesc.SetLength( copiedInfo ); |
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TRequestStatus* status = &aStatus; |
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User::RequestComplete(status, errorNum); |
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} |
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142 |
|
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// ----------------------------------------------------------------------------- |
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// CDirectoryDesc::Write |
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// Will return with KErrBadHandle |
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// ----------------------------------------------------------------------------- |
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void CDirectoryDesc::Write(TDes8& /*aDesc*/, TRequestStatus& aStatus) |
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{ |
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TInt errorNum = KErrBadHandle; |
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TRequestStatus* status = &aStatus; |
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User::RequestComplete(status, errorNum); |
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} |
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153 |
|
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// ----------------------------------------------------------------------------- |
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// CDirectoryDesc::Fcntl |
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// fcntl Implementation for directory |
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// ----------------------------------------------------------------------------- |
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// |
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TInt CDirectoryDesc::Fcntl(TUint /*anArg*/, TUint aCmd) |
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160 |
{ |
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TInt retVal = KErrNotSupported; |
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162 |
|
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if( aCmd == F_GETFL ) |
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164 |
{ |
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return iFcntlFlag; |
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} |
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return retVal; |
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} |
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169 |
|
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// ----------------------------------------------------------------------------- |
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// CDirectoryDesc::LSeek |
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// seek Implementation for directory |
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// ----------------------------------------------------------------------------- |
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// |
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TInt CDirectoryDesc::LSeek (off_t& /*offset*/, int /*whence*/) |
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176 |
{ |
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// minimal implementation for fd of a directory |
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return KErrNone; |
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} |
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180 |
|
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// ----------------------------------------------------------------------------- |
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// CDirectoryDesc::FStat |
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// stat Implementation for directory |
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// ----------------------------------------------------------------------------- |
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// |
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TInt CDirectoryDesc::FStat(struct stat *st) |
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187 |
{ |
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// set mode as directory |
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st->st_mode = S_IFDIR | S_IRUSR; |
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st->st_nlink = 1; |
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st->st_blksize = 512; |
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//More attributes for directrory can be set using RFs::Entry(iDirName, entry); |
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return KErrNone; |
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194 |
} |