--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/dbms/usql/UQ_LIT.CPP	Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,261 @@
+// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// SQL Literal value and node classes
+// 
+//
+
+#include "UQ_STD.H"
+
+// internalising literal strings, overload selectors
+
+inline HBufC8* Alloc8L(const TDesC8& aDes)
+	{return aDes.AllocL();}
+inline HBufC8* Alloc8L(const TDesC16& aDes)
+	{HBufC8* cell=HBufC8::NewL(aDes.Length());cell->Des().Copy(aDes);return cell;}
+inline HBufC16* Alloc16L(const TDesC16& aDes)
+	{return aDes.AllocL();}
+inline HBufC16* Alloc16L(const TDesC8& aDes)
+	{HBufC16* cell=HBufC16::NewL(aDes.Length());cell->Des().Copy(aDes);return cell;}
+
+template <class B,class T>
+inline B* DoInternString(B* aBuf,T*)
+	{
+	const T* base=aBuf->Ptr();
+	const T* from=base;
+	const T* end=base+aBuf->Length();
+	for (;;)
+		{
+		if (from==end)
+			return aBuf;
+		if (*from++=='\'')
+			break;
+		}
+	T* to=(T*)from;
+	++from;
+	while (from<end)
+		{
+		T c=*from++;
+		if (c=='\'')
+			++from;
+		*to++=c;
+		}
+	aBuf->Des().SetLength(to-base);
+	return aBuf;
+	}
+
+template <class B>
+inline B* InternString(B* aBuf)
+	{return DoInternString(aBuf,PtrType(*aBuf));}
+
+// Class RSqlLiteral
+
+void RSqlLiteral::Close()
+//
+// Free any allocated cell
+//
+	{
+	if(iBuffer)
+		delete iBuffer;
+	if (IsAlloc())
+		User::Free(iVal.iAlloc);
+
+		
+	}
+
+void RSqlLiteral::ToInt32L()
+//
+// Convert a numeric type to Int32
+//
+	{
+	ToInt64L();
+	const TInt64& v=iVal.iInt64;
+	TInt32 l = I64LOW(v);
+	TInt32 h = I64HIGH(v);
+	if (h==(l>>31))	// domain check, in signed 32-bit range
+		{
+		iVal.iInt32=l;
+		iType=EInt32;
+		}
+	else
+		__LEAVE(KErrOverflow);	// cannot convert
+	}
+
+void RSqlLiteral::ToUint32L()
+//
+// Convert a numeric type to Uint32
+//
+	{
+	ToInt64L();
+	const TInt64& v=iVal.iInt64;
+	if (I64HIGH(v)==0)		// domain check, in unsigned 32-bit range
+		{
+		iVal.iUint32 = I64LOW(v);
+		iType=EUint32;
+		}
+	else
+		__LEAVE(KErrOverflow);	// cannot convert
+	}
+
+void RSqlLiteral::ToInt64L()
+//
+// Convert a numeric type to int64
+//
+	{
+	__ASSERT(IsBasic());	// only apply conversions once
+	TType t=iType;
+	if (t==EReal64)
+		{
+		iVal.iInt64() = static_cast<TInt64>(Real64());
+		iType=EInt64;
+		}
+	else if (t!=EInt64)
+		__LEAVE(KErrGeneral);
+	}
+
+void RSqlLiteral::ToReal64L()
+//
+// Convert a numeric type to real64
+//
+	{
+	__ASSERT(IsBasic());	// only apply conversions once
+	TType t=iType;
+	if (t==EInt64)
+		{
+		iVal.iReal64=I64REAL(Int64());
+		iType=EReal64;
+		}
+	else if (t!=EReal64)
+		__LEAVE(KErrGeneral);
+	}
+
+void RSqlLiteral::ToReal32L()
+//
+// Convert a numeric type to real32
+//
+	{
+	ToReal64L();
+	__LEAVE_IF_ERROR(TRealX(iVal.iReal64).GetTReal(iVal.iReal32));
+	iType=EReal32;
+	}
+
+void RSqlLiteral::ToTimeL()
+//
+// Ensure we are a time
+//
+	{
+	__ASSERT(IsBasic());	// only apply conversions once
+	if (iType!=ETime)
+		__LEAVE(KErrGeneral);	// type mismatch
+	}
+
+void RSqlLiteral::ToText8L()
+//
+// Convert a ptr to a text8
+//
+	{
+	__ASSERT(IsBasic());	// only apply conversions once
+	if (iType==EPtr)
+		{
+		iVal.iAlloc=InternString(Alloc8L(DesC()));
+		iType=EBuf8;
+		}
+	else
+		__LEAVE(KErrGeneral);	// type mismatch
+	}
+
+void RSqlLiteral::ToText16L()
+//
+// Convert a ptr to a text8
+//
+	{
+	__ASSERT(IsBasic());	// only apply conversions once
+	if (iType==EPtr)
+		{
+		iVal.iAlloc=InternString(Alloc16L(DesC()));
+		iType=EBuf16;
+		}
+	else
+		__LEAVE(KErrGeneral);	// type mismatch
+	}
+
+
+
+// class CSqlLiteralNode
+
+CSqlLiteralNode::CSqlLiteralNode(TType aType,const TDesC& aColumn,const RSqlLiteral& aLiteral)
+	:CSqlBoundNode(aType,aColumn),iLiteral(aLiteral)
+	{}
+
+CSqlLiteralNode::~CSqlLiteralNode()
+	{
+	iLiteral.Close();
+	}
+
+void CSqlLiteralNode::BindL(const RDbTableRow& aSource)
+	{
+	CSqlBoundNode::BindL(aSource);
+	switch (ColType())
+		{
+	default:	// type not allowed in evaluation expressions
+		__LEAVE(KErrGeneral);
+		break;
+	case EDbColBit:
+	case EDbColInt8:
+	case EDbColUint8:
+	case EDbColInt16:
+	case EDbColUint16:
+	case EDbColInt32:
+	case EDbColUint32:
+	case EDbColInt64:
+		iLiteral.ToInt64L();
+		break;
+	case EDbColReal32:
+	case EDbColReal64:
+		iLiteral.ToReal64L();
+		break;
+	case EDbColDateTime:
+		iLiteral.ToTimeL();
+		break;
+	case EDbColText8:
+	case EDbColLongText8:
+		iLiteral.ToText8L();
+		break;
+	case EDbColText16:
+	case EDbColLongText16:
+		iLiteral.ToText16L();
+		break;
+		}
+	}
+// copy text to buffer for LIKE Escape support
+TInt RSqlLiteral::CopyText()
+	{
+	if (iType==EPtr)
+		{
+		TInt length = iVal.iPtr.iEnd - iVal.iPtr.iPtr;
+		if(iBuffer)
+			delete iBuffer;
+		if((iBuffer=HBufC::New(length+1)) == NULL)
+	        	{
+			return KErrNoMemory;
+			}
+		iBuffer->Des().Copy(iVal.iPtr.iPtr,length);
+		iVal.iPtr.iPtr= &iBuffer->Des()[0];
+		iBuffer->Des().Append(iVal.iPtr.iEnd,1);
+		iVal.iPtr.iEnd=&iBuffer->Des()[length]; 
+		}
+	else
+		return KErrGeneral;	// type mismatch
+	return KErrNone;
+	}
+