author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 17 Sep 2010 08:39:56 +0300 | |
changeset 49 | 7521e5afd3df |
parent 41 | 3256212fc81f |
child 45 | cc28652e0254 |
permissions | -rw-r--r-- |
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// Copyright (c) 2008-2010 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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#include "sqlite3.h" |
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#include "SqlAssert.h" |
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#include "SqlSrvBlob.h" |
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#include "SqliteSymbian.h" |
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#include "SqlSrvUtil.h" |
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#include "SqlSrvStrings.h" |
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#include "SqlDb.h" |
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#include "OstTraceDefinitions.h" |
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#ifdef OST_TRACE_COMPILER_IN_USE |
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#include "SqlSrvBlobTraces.h" |
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#endif |
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#include "SqlTraceDef.h" |
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#define UNUSED_VAR(var) var = var |
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/** |
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Creates a new HBlobBuf instance. |
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@param aDb The database handle |
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@param aDbName The database name, zero-terminated. If the blob belongs to one of the attached databases, |
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then the attached database name should be used as the value of aDbName, otherwise the |
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value should be "main" |
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@param aTableName The name of the table to which the blob belongs, zero-terminated. |
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@param aColumnName The name of the blob column, zero-terminated. |
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@param aRowId The ROWID of the row to which the blob belongs |
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@param aMode Specifies the blob access mode, either HBlobBuf::EReadOnly or HBlobBuf::EReadWrite |
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@leave KErrNoMemory, An out of memory condition has occurred; |
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Note that the function may also leave with some other system wide errors or |
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database specific errors categorised as ESqlDbError. |
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@return A pointer to the created HBlobBuf instance |
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@panic SqlDb 4 In _DEBUG mode. NULL aDb parameter. |
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@panic SqlDb 4 In _DEBUG mode. Negative or zero aRowId. |
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@panic SqlDb 4 In _DEBUG mode. aMode parameter is not HBlobBuf::EReadOnly or HBlobBuf::EReadWrite. |
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*/ |
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HBlobBuf* HBlobBuf::NewL(sqlite3* aDb, const TDesC8& aDbName, const TDesC8& aTableName, const TDesC8& aColumnName, TInt64 aRowId, TMode aMode) |
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{ |
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__SQLTRACE_BLOBVAR(TBuf<100> des16prnbuf); |
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SQL_TRACE_BLOB(OstTraceExt4(TRACE_INTERNALS, HBLOBBUF_NEWL_ENTRY1, "Entry;0;HBlobBuf::NewL;sqlite3*=0x%X;aDbName=%s;aRowId=%lld;aMode=%d", (TUint)aDb, __SQLPRNSTR8(aDbName, des16prnbuf), aRowId, (TInt)aMode)); |
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SQL_TRACE_BLOB(OstTraceExt1(TRACE_INTERNALS, HBLOBBUF_NEWL_ENTRY2, "Entry;0;HBlobBuf::NewL;aTableName=%s", __SQLPRNSTR8(aTableName, des16prnbuf))); |
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SQL_TRACE_BLOB(OstTraceExt1(TRACE_INTERNALS, HBLOBBUF_NEWL_ENTRY3, "Entry;0;HBlobBuf::NewL;aColumnName=%s", __SQLPRNSTR8(aColumnName, des16prnbuf))); |
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__ASSERT_DEBUG(aDb != NULL, __SQLPANIC2(ESqlPanicBadArgument)); |
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__ASSERT_DEBUG(aRowId > 0, __SQLPANIC2(ESqlPanicBadArgument)); |
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__ASSERT_DEBUG(aMode == HBlobBuf::EReadOnly || aMode == HBlobBuf::EReadWrite, __SQLPANIC2(ESqlPanicBadArgument)); |
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HBlobBuf* self = new (ELeave) HBlobBuf; |
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CleanupStack::PushL(self); |
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self->ConstructL(aDb, aDbName, aTableName, aColumnName, aRowId, aMode); |
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CleanupStack::Pop(self); |
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SQL_TRACE_BLOB(OstTraceExt2(TRACE_INTERNALS, HBLOBBUF_NEWL_EXIT, "Exit;0x%X;HBlobBuf::NewL;sqlite3_blob*=0x%X", (TUint)self, (TUint)self->iBlobHandle)); |
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return self; |
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} |
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/** |
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Initializes HBlobBuf data members with their default values. |
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*/ |
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HBlobBuf::HBlobBuf() : |
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iBlobHandle(NULL), |
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iWrPos(KMinTInt), |
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iRdPos(KMinTInt) |
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{ |
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} |
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/** |
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Initializes a new HBlobBuf instance. |
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@param aDb The database handle |
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@param aDbName The database name, zero-terminated. If the blob belongs to one of the attached databases, |
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then the attached database name should be used as a value of aDbName, otherwise the |
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value should be "main" |
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@param aTableName The name of the table to which the blob belongs, zero-terminated. |
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@param aColumnName The name of the blob column, zero-terminated. |
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@param aRowId The ROWID of the row to which the blob belongs |
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@param aMode Specifies the blob access mode, either HBlobBuf::EReadOnly or HBlobBuf::EReadWrite |
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@leave KErrNoMemory, An out of memory condition has occurred; |
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Note that the function may also leave with some other system wide errors or |
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database specific errors categorised as ESqlDbError. |
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96 |
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@panic SqlDb 4 In _DEBUG mode. NULL aDb parameter. |
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@panic SqlDb 4 In _DEBUG mode. Negative or zero aRowId. |
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@panic SqlDb 4 In _DEBUG mode. aMode parameter is not HBlobBuf::EReadOnly or HBlobBuf::EReadWrite. |
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@panic SqlDb 7 In _DEBUG mode. NULL blob handle. |
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*/ |
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void HBlobBuf::ConstructL(sqlite3* aDb, const TDesC8& aDbName, const TDesC8& aTableName, const TDesC8& aColumnName, TInt64 aRowId, TMode aMode) |
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{ |
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__ASSERT_DEBUG(aDb != NULL, __SQLPANIC(ESqlPanicBadArgument)); |
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__ASSERT_DEBUG(aRowId > 0, __SQLPANIC(ESqlPanicBadArgument)); |
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__ASSERT_DEBUG(aMode == HBlobBuf::EReadOnly || aMode == HBlobBuf::EReadWrite, __SQLPANIC(ESqlPanicBadArgument)); |
0
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107 |
|
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(void)sqlite3SymbianLastOsError();//clear last OS error |
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109 |
|
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TInt err = sqlite3_blob_open(aDb, (const char*)aDbName.Ptr(), (const char*)aTableName.Ptr(), (const char*)aColumnName.Ptr(), |
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aRowId, aMode & HBlobBuf::EReadWrite, &iBlobHandle); |
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__SQLLEAVE_IF_ERROR(::Sql2OsErrCode(err, sqlite3SymbianLastOsError())); |
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__ASSERT_DEBUG(iBlobHandle != NULL, __SQLPANIC(ESqlPanicInternalError)); |
0
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iBlobSize = sqlite3_blob_bytes(iBlobHandle); |
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iWrPos = iRdPos = 0; |
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} |
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117 |
|
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118 |
/** |
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Closes the blob handle as part of the HBlobBuf object being destroyed. |
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*/ |
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void HBlobBuf::DoRelease() |
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{ |
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SQL_TRACE_BLOB(OstTraceExt2(TRACE_INTERNALS, HBLOBBUF_DORELEASE_ENTRY, "Entry;0x%X;HBlobBuf::DoRelease;sqlite3_blob*=0x%X", (TUint)this, (TUint)iBlobHandle)); |
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TRAPD(err, DoSynchL()); |
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SQL_TRACE_BLOB(OstTraceExt2(TRACE_INTERNALS, HBLOBBUF_DORELEASE_EXIT, "Exit;0x%X;HBlobBuf::DoRelease;err=%d", (TUint)this, err)); |
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UNUSED_VAR(err); |
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} |
0
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128 |
|
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129 |
/** |
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Closes the blob handle. |
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Any buffered data is delivered to the stream. |
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*/ |
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void HBlobBuf::DoSynchL() |
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134 |
{ |
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if(iBlobHandle) |
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136 |
{ |
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TInt err = sqlite3_blob_close(iBlobHandle); |
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SQL_TRACE_BLOB(OstTraceExt2(TRACE_INTERNALS, HBLOBBUF_DOSYNCHL, "0x%X;HBlobBuf::DoSynchL;err=%d", (TUint)this, err)); |
0
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iBlobHandle = NULL; // the close is unconditional, even if an error occurs |
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__SQLLEAVE_IF_ERROR(::Sql2OsErrCode(err, sqlite3SymbianLastOsError())); |
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} |
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} |
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143 |
|
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/** |
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Reads a data block from the blob with the specified length. |
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146 |
|
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@param aPtr Pointer to the location where the blob data will be copied |
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@param aMaxLength The length of the data block to be read |
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149 |
|
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@leave KErrNoMemory, An out of memory condition has occurred; |
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KErrEof, An attempt has been made to read beyond the end of the blob; |
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KErrBadHandle, NULL blob handle; |
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Note that the function may also leave with some other system |
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wide errors or database specific errors categorised as ESqlDbError. |
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155 |
|
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@return The number of bytes read. |
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157 |
|
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@panic SqlDb 4 In _DEBUG mode. NULL aPtr parameter. |
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@panic SqlDb 4 In _DEBUG mode. Negative aMaxLength parameter. |
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@panic SqlDb 2 In _DEBUG mode. NULL iBlobHandle. |
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161 |
*/ |
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TInt HBlobBuf::DoReadL(TAny* aPtr, TInt aMaxLength) |
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{ |
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__ASSERT_DEBUG(aPtr != NULL, __SQLPANIC(ESqlPanicBadArgument)); |
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__ASSERT_DEBUG(aMaxLength >= 0, __SQLPANIC(ESqlPanicBadArgument)); |
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__ASSERT_DEBUG(iBlobHandle != NULL, __SQLPANIC(ESqlPanicInvalidObj)); |
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167 |
|
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SQL_TRACE_BLOB(OstTraceExt5(TRACE_INTERNALS, HBLOBBUF_DOREADL, "0x%X;HBlobBuf::DoReadL;aMaxLength=%d;iBlobSize=%d;iWrPos=%d;iRdPos=%d", (TUint)this, aMaxLength, iBlobSize, iWrPos, iRdPos)); |
0
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169 |
|
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if(aMaxLength <= 0) |
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171 |
{ |
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return 0; |
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} |
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174 |
|
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(void)sqlite3SymbianLastOsError();//clear last OS error |
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176 |
|
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if(iRdPos >= iBlobSize) |
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{ |
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__SQLLEAVE(KErrEof); |
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} |
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if((aMaxLength + iRdPos) > iBlobSize) |
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{ |
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aMaxLength = iBlobSize - iRdPos; |
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} |
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TInt err = sqlite3_blob_read(BlobHandleL(), aPtr, aMaxLength, iRdPos); |
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__SQLLEAVE_IF_ERROR(::Sql2OsErrCode(err, sqlite3SymbianLastOsError())); |
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iRdPos += aMaxLength; |
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return aMaxLength; |
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} |
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190 |
|
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191 |
/** |
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192 |
Writes a data block with the specified length to the blob. |
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|
193 |
|
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@param aPtr Pointer to the location with the blob data to be written |
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195 |
@param aLength The length of the data block to be written |
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|
196 |
|
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197 |
@leave KErrNoMemory, An out of memory condition has occurred; |
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|
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KErrEof, An attempt has been made to write beyond the end of the blob; |
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|
199 |
KErrBadHandle, NULL blob handle; |
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|
200 |
Note that the function may also leave with some other system |
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|
201 |
wide errors or database specific errors categorised as ESqlDbError. |
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|
202 |
|
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|
203 |
@panic SqlDb 4 In _DEBUG mode. NULL aPtr parameter. |
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|
204 |
@panic SqlDb 4 In _DEBUG mode. Negative aLength parameter. |
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|
205 |
@panic SqlDb 2 In _DEBUG mode. NULL iBlobHandle. |
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|
206 |
*/ |
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|
207 |
void HBlobBuf::DoWriteL(const TAny* aPtr, TInt aLength) |
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208 |
{ |
41
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209 |
__ASSERT_DEBUG(aPtr != NULL, __SQLPANIC(ESqlPanicBadArgument)); |
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|
210 |
__ASSERT_DEBUG(aLength >= 0, __SQLPANIC(ESqlPanicBadArgument)); |
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|
211 |
__ASSERT_DEBUG(iBlobHandle != NULL, __SQLPANIC(ESqlPanicInvalidObj)); |
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|
212 |
|
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|
213 |
SQL_TRACE_BLOB(OstTraceExt5(TRACE_INTERNALS, HBLOBBUF_DOWRITEL, "0x%X;HBlobBuf::DoWriteL;aLength=%d;iBlobSize=%d;iWrPos=%d;iRdPos=%d", (TUint)this, aLength, iBlobSize, iWrPos, iRdPos)); |
0
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|
214 |
|
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215 |
if(aLength <= 0) |
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216 |
{ |
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217 |
return; |
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218 |
} |
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|
219 |
|
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|
220 |
if((iWrPos + aLength) > iBlobSize) |
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|
221 |
{ |
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|
222 |
__SQLLEAVE(KErrEof); |
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|
223 |
} |
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|
224 |
|
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|
225 |
(void)sqlite3SymbianLastOsError();//clear last OS error |
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|
226 |
TInt err = sqlite3_blob_write(BlobHandleL(), aPtr, aLength, iWrPos); |
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|
227 |
err = ::Sql2OsErrCode(err, sqlite3SymbianLastOsError()); |
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|
228 |
|
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|
229 |
__SQLLEAVE_IF_ERROR(err); |
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|
230 |
iWrPos += aLength; |
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|
231 |
} |
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|
232 |
|
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|
233 |
/** |
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|
234 |
Positions the mark(s) indicated by aMark at aOffset from aLocation. |
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|
235 |
|
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|
236 |
@leave KErrEof, An attempt has been made to seek beyond the end of the blob; |
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Revision: 201003
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parents:
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|
237 |
KErrBadHandle, NULL blob handle; |
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Revision: 201003
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|
238 |
Note that the function may also leave with some other system wide errors or |
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Revision: 201003
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parents:
diff
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|
239 |
database specific errors categorised as ESqlDbError. |
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diff
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|
240 |
|
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Revision: 201003
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|
241 |
@return The new stream position (read or write) |
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Revision: 201003
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|
242 |
|
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Revision: 201003
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|
243 |
@panic SqlDb 2 In _DEBUG mode. NULL iBlobHandle. |
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Revision: 201003
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diff
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|
244 |
@panic SqlDb 4 In _DEBUG mode. Negative aOffset parameter. |
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Revision: 201003
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|
245 |
@panic SqlDb 8 In _DEBUG mode. Invalid aMark parameter. |
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Revision: 201003
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|
246 |
@panic SqlDb 9 In _DEBUG mode. Invalid aLocation parameter. |
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Revision: 201003
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|
247 |
*/ |
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Revision: 201003
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|
248 |
TStreamPos HBlobBuf::DoSeekL(MStreamBuf::TMark aMark, TStreamLocation aLocation, TInt aOffset) |
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|
249 |
{ |
41
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Revision: 201033
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|
250 |
SQL_TRACE_BLOB(OstTraceExt5(TRACE_INTERNALS, HBLOBBUF_DOSEEKL, "0x%X;HBlobBuf::DoSeekL;aMark=%d;aLocation=%d;aOffset=%d;iBlobSize=%d", (TUint)this, (TInt)aMark, (TInt)aLocation, aOffset, iBlobSize)); |
3256212fc81f
Revision: 201033
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0
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|
251 |
__ASSERT_ALWAYS(!(aMark & ~(ERead | EWrite)), __SQLPANIC(ESqlPanicStreamMarkInvalid)); |
3256212fc81f
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0
diff
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|
252 |
__ASSERT_DEBUG(aOffset >= 0, __SQLPANIC(ESqlPanicBadArgument)); |
3256212fc81f
Revision: 201033
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0
diff
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|
253 |
__ASSERT_DEBUG(iBlobHandle != NULL, __SQLPANIC(ESqlPanicInvalidObj)); |
0
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Revision: 201003
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diff
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|
254 |
|
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Revision: 201003
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|
255 |
TInt newPos = 0; |
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Revision: 201003
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|
256 |
switch(aLocation) |
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Revision: 201003
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|
257 |
{ |
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Revision: 201003
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|
258 |
case EStreamBeginning: |
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Revision: 201003
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|
259 |
newPos = aOffset; |
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Revision: 201003
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|
260 |
break; |
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Revision: 201003
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diff
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|
261 |
case EStreamMark: |
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Revision: 201003
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|
262 |
newPos = (aMark & MStreamBuf::EWrite ? iWrPos : iRdPos) + aOffset; |
08ec8eefde2f
Revision: 201003
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|
263 |
break; |
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Revision: 201003
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diff
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|
264 |
case EStreamEnd: |
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Revision: 201003
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|
265 |
newPos = iBlobSize + aOffset; |
08ec8eefde2f
Revision: 201003
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|
266 |
break; |
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Revision: 201003
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|
267 |
default: |
41
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Revision: 201033
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0
diff
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|
268 |
__ASSERT_DEBUG(0, __SQLPANIC(ESqlPanicStreamLocationInvalid)); |
0
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Revision: 201003
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|
269 |
newPos = -1; |
08ec8eefde2f
Revision: 201003
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|
270 |
break; |
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Revision: 201003
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|
271 |
} |
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Revision: 201003
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|
272 |
if(newPos < 0 || newPos > iBlobSize) |
08ec8eefde2f
Revision: 201003
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|
273 |
{ |
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Revision: 201003
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|
274 |
__SQLLEAVE(KErrEof); |
08ec8eefde2f
Revision: 201003
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|
275 |
} |
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Revision: 201003
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parents:
diff
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|
276 |
if(aMark & MStreamBuf::EWrite) |
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Revision: 201003
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|
277 |
{ |
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Revision: 201003
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parents:
diff
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|
278 |
iWrPos = newPos; |
08ec8eefde2f
Revision: 201003
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|
279 |
} |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
280 |
else if(aMark & MStreamBuf::ERead) |
08ec8eefde2f
Revision: 201003
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|
281 |
{ |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
282 |
iRdPos = newPos; |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
283 |
} |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
284 |
return TStreamPos(newPos); |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
285 |
} |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
286 |
|
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
287 |
/** |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
288 |
Returns the blob handle, if it is not NULL. |
08ec8eefde2f
Revision: 201003
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parents:
diff
changeset
|
289 |
|
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
290 |
@leave KErrBadHandle, The blob handle is NULL. |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
291 |
|
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
292 |
@return The blob handle |
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*/ |
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sqlite3_blob* HBlobBuf::BlobHandleL() |
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{ |
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if(!iBlobHandle) |
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{ |
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__SQLLEAVE(KErrBadHandle); |
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} |
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return iBlobHandle; |
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} |