// 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:

//

#include "U32STD.H"

#include "D32SQL.H"

#include "D32TABLE.H"

#include <e32math.h>

#include <s32mem.h>

//Forward declarations

class TSqlParser2;

// Classes defined

class TSqlToken;

class TSqlLexer;

class TSqlParser;

template <class T,class D> class TMatcher;

template <class T,class D> class TDesMatcher;

template <class T,class D> class TStreamMatcher;

template <class T,class D> class HMatcherPattern;

class CSqlCreateTableStatement;

class CSqlDropTableStatement;

class CSqlAlterTableStatement;

class CSqlCreateIndexStatement;

class CSqlDropIndexStatement;

/**

parser classes

@internalComponent

*/

enum TSqlTokenType

	{

	ESqlNoToken=0,

//

	ESqlEos,

//

	ESqlIdentifier,

	ESqlLiteralInt,

	ESqlLiteralReal,

	ESqlLiteralTime,

	ESqlLiteralText,

//

	ESqlAsterisk,

	ESqlComma,

	ESqlLeftBracket,

	ESqlRightBracket,

	ESqlLess,

	ESqlLessEqual,

	ESqlEqual,

	ESqlGreaterEqual,

	ESqlGreater,

	ESqlNotEqual

	};

/**

@internalComponent

*/

enum TSqlKeyword

	{

	ESqlNotKeyword=-1,

//

#define KEYWORD(s) ESqlKeyword_##s

#include "UQ_KEYWD.H"

#undef KEYWORD

	};

class TSqlToken

/**

@internalComponent

*/

	{

	friend class TSqlLexer;

public:

	inline TBool operator==(TSqlTokenType aType) const;

	inline TBool operator!=(TSqlTokenType aType) const;

//

	inline void SetError(TInt aError);

	inline TInt Error() const;

//

	inline TSqlTokenType Type() const;

	inline const RSqlLiteral& Literal() const;

	inline RSqlLiteral& Literal();

private:

	inline TSqlTokenType operator=(TSqlTokenType aType);

private:

	TInt iType;

	RSqlLiteral iLiteral;

	};

class TSqlLexer

/**

@internalComponent

*/

	{

public:

	TSqlLexer(const TDesC& aSql);

	inline TSqlTokenType NextToken(TSqlToken& aToken);

	static TSqlKeyword Keyword(const TSqlToken& aToken);

	static inline TBool IsKeyword(TSqlKeyword aKeyword,const TSqlToken& aToken);

	const TText* Next() const;

	void Set(const TText* aNext);	

private:

	TSqlTokenType GetIdentifier(TSqlToken& aToken);

	TSqlTokenType GetString(TSqlToken& aToken);

	TInt GetInteger(TInt64& aValue);

	TSqlTokenType GetNumber(TSqlToken& aToken);

	TSqlTokenType GetDate(TSqlToken& aToken);

	TSqlTokenType GetNextToken(TSqlToken& aToken);

//

	static inline TSqlTokenType SqlError(TInt aError=KErrArgument);

	static TInt CompareKeyword(TInt aKeyword,const RSqlLiteral& aIdentifier);

private:

	const TText* iNext;

	const TText* iEnd;

	};

class TSqlParser

/**

@internalComponent

*/

	{

	friend class TSqlParser2;

public:

	TSqlParser(const TDesC& aSql);

//

	CSqlQuery* QueryLC();

	CSqlSearchCondition* SearchConditionLC();

	CSqlDDLStatement* DDLStatementLC();

	CSqlDMLStatement* DMLStatementLC();

	Sql::TStatementType Type();

	TInt PatternFilter(const TDesC& aPattern,const TChar aEscape, TText *aNewPatternBuffer );

private:

	TSqlTokenType NextToken();

	CSqlSearchCondition* SqlError();

	inline TInt Error() const;

	static TSqlTokenType SqlErrorL();

//

	TSqlTokenType Parse(TSqlKeyword aKeyword);

	TSqlTokenType ParseL(TSqlTokenType aToken);

	TSqlTokenType ParseL(TSqlKeyword aKeyword);

	TSqlKeyword Keyword();

	TSqlTokenType RightBracketL();

	TSqlTokenType IdentifierL(TPtrC& aIdentifier);

	TPtrC IdentifierL();

	void EndL();

//

	TSqlTokenType ColumnNameL(RSqlColumnList& aList);

	TSqlTokenType ColumnListL(RSqlColumnList& aList);

	CSqlSearchCondition* SearchCondition(TInt aNot);

	CSqlSearchCondition* BooleanTerm(TInt aNot);

	CSqlSearchCondition* BooleanFactor(TInt aNot);

	CSqlSearchCondition* BooleanPrimary(TInt aNot);

	CSqlSearchCondition* Predicate(TInt aNot);

	void SortSpecificationL(CDbKey& aKey);

	CDbKey* SortSpecificationL();

	void DoQueryL(CSqlQuery& aQuery);

	CSqlSearchCondition* SearchConditionL();

//

	TSqlTokenType AddColumnSpecL(TDbCol& aDef);

	CSqlDDLStatement* CreateTableLC();

	CSqlDDLStatement* DropTableLC();

	CSqlDDLStatement* AlterTableLC();

	CSqlDDLStatement* CreateIndexLC(TBool aUnique);

	CSqlDDLStatement* DropIndexLC();

//

	TSqlTokenType ColumnValueL(CSqlValues& aValues);

	CSqlDMLStatement* InsertStatementLC();

	CSqlDMLStatement* UpdateStatementLC();

	CSqlDMLStatement* DeleteStatementLC();

private:

	TSqlLexer iSql;

	TSqlToken iToken;

	};

/**

LIKE evaluation support

@internalComponent

*/

enum TSegmentType {ENull,ESuccess,EStop,EBeginning,EEnd,EMiddle,ESkip,EEscape,EMask=0xf,EWild=0x80};

/**

@internalComponent

*/

const TInt KPatternGranularity=0x20;

// If this value is changed class documentation must be updated.

// Namely, RDbDatabase and TDbQuery.

const TInt KMaxSegmentLength=0xff;

template <class T,class D>

class HMatcherPattern

/**

@internalComponent

*/

	{

	friend class TMatcher<T,D>;

	typedef HMatcherPattern<T,D> TThis;

public:

	static HMatcherPattern<T,D>* NewL(const D& aPattern,TBool aEscape = EFalse);

	TInt MatchL(const D& aDes,const TTextOps& aTextOp) const;

	TInt MatchL(MStreamBuf& aBuf,TInt aLength,const TTextOps& aTextOp) const;

private:

	static TInt Construct(HMatcherPattern<T,D>*& aCell,const D& aPattern,TBool aEscape = EFalse);

	static inline HMatcherPattern<T,D>* Realloc(HMatcherPattern<T,D>* aThis,TInt aSize);

private:

	T iPattern[1];

	};

template <class T,class D>

class TMatcher

/**

@internalComponent

*/

	{

public:

	TBool MatchL(const HMatcherPattern<T,D>& aPattern,const TTextOps& aTextOp);

private:

	virtual const T* UnderflowL(const T*& aEnd,TInt aRetain=0) =0;

	};

template <class T,class D>

class TDesMatcher : public TMatcher<T,D>

/**

@internalComponent

*/

	{

public:

	inline TDesMatcher(const D& aDes);

private:

	const T* UnderflowL(const T*& aEnd,TInt aRetain=0);

private:

	const T* iPtr;

	const T* iEnd;

	};

template <class T,class D>

class TStreamMatcher : public TMatcher<T,D>

/**

@internalComponent

*/

	{

public:

	inline TStreamMatcher(MStreamBuf& aStreamBuf,TInt aLength);

private:

	const T* UnderflowL(const T*& aEnd,TInt aRetain=0);

private:

	enum {EBufSize=0x200};

private:

	RReadStream iStream;

	TInt iRemain;

	T iBuffer[EBufSize];

	const T* iEnd;

	};

NONSHARABLE_CLASS(CSqlCreateTableStatement) : public CSqlDDLStatement

/**

DDL statements

@internalComponent

*/

	{

private:

	CDbIncremental* ExecuteL(CDbDatabase& aDatabase,TDbTextComparison aComparison,TInt& aSteps);

public:

	TPtrC iName;

	CDbColSet iColumns;

	};

NONSHARABLE_CLASS(CSqlDropTableStatement) : public CSqlDDLStatement

/**

@internalComponent

*/

	{

private:

	CDbIncremental* ExecuteL(CDbDatabase& aDatabase,TDbTextComparison aComparison,TInt& aSteps);

public:

	TPtrC iName;

	};

NONSHARABLE_CLASS(CSqlAlterTableStatement) : public CSqlDDLStatement

/**

@internalComponent

*/

	{

public:

	~CSqlAlterTableStatement();

private:

	CDbIncremental* ExecuteL(CDbDatabase& aDatabase,TDbTextComparison aComparison,TInt& aSteps);

public:

	TPtrC iName;

	CDbColSet iAdd;

	RSqlColumnList iDrop;

	};

NONSHARABLE_CLASS(CSqlCreateIndexStatement) : public CSqlDDLStatement

/**

@internalComponent

*/

	{

private:

	CDbIncremental* ExecuteL(CDbDatabase& aDatabase,TDbTextComparison aComparison,TInt& aSteps);

public:

	TPtrC iName;

	TPtrC iTable;

	CDbKey iKey;

	};

NONSHARABLE_CLASS(CSqlDropIndexStatement) : public CSqlDDLStatement

/**

@internalComponent

*/

	{

private:

	CDbIncremental* ExecuteL(CDbDatabase& aDatabase,TDbTextComparison aComparison,TInt& aSteps);

public:

	TPtrC iName;

	TPtrC iTable;

	};

#include "UQ_STD.INL"