1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/persistentdata/persistentstorage/dbms/ustor/US_FILE.CPP Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,178 @@
1.4 +// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
1.5 +// All rights reserved.
1.6 +// This component and the accompanying materials are made available
1.7 +// under the terms of "Eclipse Public License v1.0"
1.8 +// which accompanies this distribution, and is available
1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.10 +//
1.11 +// Initial Contributors:
1.12 +// Nokia Corporation - initial contribution.
1.13 +//
1.14 +// Contributors:
1.15 +//
1.16 +// Description:
1.17 +// The file-store database which provides the default format
1.18 +//
1.19 +//
1.20 +
1.21 +#include "US_STD.H"
1.22 +#include <s32file.h>
1.23 +
1.24 +EXPORT_C CDbFileStoreDatabase::CDbFileStoreDatabase(RFs& aFs)
1.25 + :iFs(aFs)
1.26 + {}
1.27 +
1.28 +EXPORT_C CDbFileStoreDatabase::~CDbFileStoreDatabase()
1.29 + {
1.30 + if (iDelete)
1.31 + {
1.32 + delete iStore; // must be destroyed before the file is deleted
1.33 + iStore=0;
1.34 +
1.35 + // If a debug build - record error
1.36 + TInt fileDeleteErr=iFs.Delete(*iName);
1.37 + #ifdef _DEBUG
1.38 + if (fileDeleteErr != KErrNone)
1.39 + {
1.40 + RDebug::Print(_L("CDbFileStoreDatabase::~CDbFileStoreDatabase - Failed to delete file. Error = %d"), fileDeleteErr);
1.41 + }
1.42 + #endif
1.43 + }
1.44 + delete iName;
1.45 + }
1.46 +
1.47 +CDbFileStoreDatabase* CDbFileStoreDatabase::NewLC(RFs& aFs)
1.48 + {
1.49 + CDbFileStoreDatabase* self=new(ELeave) CDbFileStoreDatabase(aFs);
1.50 + CleanupStack::PushL(self);
1.51 + return self;
1.52 + }
1.53 +
1.54 +//
1.55 +// over-ride the store database and just mark the file for deletion
1.56 +//
1.57 +EXPORT_C void CDbFileStoreDatabase::DestroyL()
1.58 + {
1.59 + iDelete=ETrue;
1.60 + }
1.61 +
1.62 +//
1.63 +// Provide the "size" and "usage" properties
1.64 +//
1.65 +EXPORT_C TInt CDbFileStoreDatabase::Property(CDbDatabase::TProperty aProperty)
1.66 + {
1.67 + switch (aProperty)
1.68 + {
1.69 + case CDbDatabase::EUpdateStats:
1.70 + return 1;
1.71 + case CDbDatabase::ESize:
1.72 + case CDbDatabase::EUsage:
1.73 + {
1.74 + TInt size;
1.75 + TInt r=STATIC_CAST(CFileStore&,Store()).File().Size(size);
1.76 + if (r<0)
1.77 + return r;
1.78 + if (aProperty==CDbDatabase::ESize)
1.79 + return size;
1.80 + r=iReclaim;
1.81 + if (r<0)
1.82 + return r;
1.83 + return 100-(r*100)/size; // usage in %
1.84 + }
1.85 + default:
1.86 + return CDbStoreDatabase::Property(aProperty);
1.87 + }
1.88 + }
1.89 +
1.90 +
1.91 +//SYMBIAN_REMOVE_TRIVIAL_ENCRYPTION version of the method.
1.92 +EXPORT_C void CDbFileStoreDatabase::CreateL(const TDesC& aName, TDbFormat::TCreate aMode,
1.93 + const TUidType& aType)
1.94 + {
1.95 + __ASSERT(!iName); // check construction phase
1.96 +//
1.97 + iName=aName.AllocL();
1.98 + CFileStore* store;
1.99 + switch (aMode)
1.100 + {
1.101 + default:
1.102 + __LEAVE(KErrNotSupported);
1.103 + case TDbFormat::ECreate:
1.104 + store=CPermanentFileStore::CreateL(iFs,aName,EFileRead|EFileWrite);
1.105 + break;
1.106 + case TDbFormat::EReplace:
1.107 + store=CPermanentFileStore::ReplaceL(iFs,aName,EFileRead|EFileWrite);
1.108 + break;
1.109 + };
1.110 + iStore=store;
1.111 + iDelete=ETrue; // cleanup fully in case of failure
1.112 + store->SetTypeL(aType);
1.113 + store->SetRootL(CreateRootL(CDbStoreDatabase::ConstructL()));
1.114 + store->CommitL();
1.115 + iDelete=EFalse; // file is now good
1.116 + }
1.117 +
1.118 +// SYMBIAN_REMOVE_TRIVIAL_ENCRYPTION version of the method.
1.119 +// Create the standard file database. The database is the root stream
1.120 +//
1.121 +EXPORT_C CDbDatabase* CDbFileStoreDatabase::CreateL(RFs& aFs, const TDesC& aName,
1.122 + TDbFormat::TCreate aMode, const TUidType& aType)
1.123 + {
1.124 + CDbFileStoreDatabase* self=NewLC(aFs);
1.125 + self->CreateL(aName,aMode,aType);
1.126 + CDbDatabase* db=self->InterfaceL();
1.127 + CleanupStack::Pop(self);
1.128 + return db;
1.129 + }
1.130 +
1.131 +
1.132 +//
1.133 +// default implementation. Database _is_ the root
1.134 +//
1.135 +EXPORT_C TStreamId CDbFileStoreDatabase::CreateRootL(TStreamId aDatabaseId)
1.136 + {
1.137 + return aDatabaseId;
1.138 + }
1.139 +
1.140 +//
1.141 +// Open, phase #1
1.142 +// open the file-store and return the root stream id
1.143 +//
1.144 +EXPORT_C void CDbFileStoreDatabase::OpenL(const TDesC& aName,TDbFormat::TOpen aMode)
1.145 + {
1.146 + __ASSERT(!iName); // check construction phase
1.147 +//
1.148 + iName=aName.AllocL();
1.149 + TUint mode=aMode==TDbFormat::EReadOnly ? EFileShareReadersOnly : EFileWrite;
1.150 + CFileStore* store=CPermanentFileStore::OpenL(iFs,*iName,mode);
1.151 + iStore=store;
1.152 + CDbStoreDatabase::RestoreL(DatabaseIdL(store->Root()));
1.153 + }
1.154 +
1.155 +//
1.156 +// default implementation. Database _is_ the root
1.157 +//
1.158 +EXPORT_C TStreamId CDbFileStoreDatabase::DatabaseIdL(TStreamId aRootId)
1.159 + {
1.160 + return aRootId;
1.161 + }
1.162 +
1.163 +//
1.164 +// Create the standard file database. The database is the root stream
1.165 +//
1.166 +EXPORT_C CDbSource* CDbFileStoreDatabase::OpenL(RFs& aFs,const TDesC& aName,TDbFormat::TOpen aMode)
1.167 + {
1.168 + CDbFileStoreDatabase* self=NewLC(aFs);
1.169 + self->OpenL(aName,aMode);
1.170 + CDbSource* src=self->SourceL();
1.171 + CleanupStack::Pop(); // self
1.172 + return src;
1.173 + }
1.174 +
1.175 +const TDbFormat KBuiltinFormat=
1.176 + {
1.177 + _S("epoc"),&CDbFileStoreDatabase::CreateL,&CDbFileStoreDatabase::OpenL,
1.178 + {KPermanentFileStoreLayoutUidValue,KDbmsFileDatabaseUidValue}
1.179 + };
1.180 +
1.181 +GLDEF_D const TDbDriver KBuiltinDriver={1,&KBuiltinFormat};