// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

// which accompanies this distribution, and is available

// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// e32\include\e32des16.h

// 

//

#ifndef __E32DES16_H__

#define __E32DES16_H__

/**

@internalComponent

*/

const TUint KMaskDesLength16=0xfffffff;

/**

@internalComponent

*/

const TInt KShiftDesType16=28;

class TBufCBase16;

class TDes16;

class TPtrC16;

class TPtr16;

struct TCollationMethod;

class HBufC16;

class HBufC8;

class TDesC16

/**

@publishedAll

@released

Abstract base class for 16-bit descriptors.

The class encapsulates the data member containing the length of data

represented by a 16-bit descriptor. It also provides member functions through

which the data can be accessed, but not modified.

Data represented by this class is treated as a contiguous set of 16-bit (i.e. 

double byte) values or data items.

This class cannot be instantiated as it is intended to form part of a class 

hierarchy; it provides a well defined part of descriptor behaviour. It can, 

however, be passed as an argument type for functions which want access to 

descriptor data but do not need to modify that data.

@see TDesC

@see TPtrC16

*/

    {

public:

    /**

    A value returned by a call to HasPrefixC().

    @see TDesC16::HasPrefixC

    */

	enum TPrefix {

	              /**

	              Indicates that a supplied prefix can be extended to

                  be equivalent to the text at the start of a descriptor.

	              */

	              EIsPrefix = 0,

   	              /**

   	              Indicates that a supplied prefix does not seem to be a

   	              prefix, but it is possible that it could be extended to

   	              become equivalent to text at the start of this descriptor.

                  */

	              EMightBePrefix = 1,

   	              /**

   	              Indicates that a supplied prefix cannot be extended to be

   	              equivalent to the text at the start of a descriptor.

                  */

	              EIsNotPrefix = 2

	             };

public:

	inline TBool operator<(const TDesC16 &aDes) const;

	inline TBool operator<=(const TDesC16 &aDes) const;

	inline TBool operator>(const TDesC16 &aDes) const;

	inline TBool operator>=(const TDesC16 &aDes) const;

	inline TBool operator==(const TDesC16 &aDes) const;

	inline TBool operator!=(const TDesC16 &aDes) const;

	inline const TUint16 &operator[](TInt anIndex) const;

	inline TInt Length() const;

	inline TInt Size() const;

	IMPORT_C const TUint16 *Ptr() const;

	IMPORT_C TInt Compare(const TDesC16 &aDes) const;

	IMPORT_C TInt CompareF(const TDesC16 &aDes) const;

	IMPORT_C TInt CompareC(const TDesC16 &aDes) const;

	IMPORT_C TInt CompareC(const TDesC16& aDes,TInt aMaxLevel,const TCollationMethod* aCollationMethod) const;	

	/**

	@internalComponent

	*/

	IMPORT_C HBufC16* GetNormalizedDecomposedFormL() const;

	/**

	@internalComponent

	*/	

	IMPORT_C HBufC16* GetFoldedDecomposedFormL() const;

	/**

	@internalComponent

	*/

	IMPORT_C HBufC8* GetCollationKeysL(TInt aMaxLevel,const TCollationMethod* aCollationMethod) const;

	IMPORT_C TInt Match(const TDesC16 &aDes) const;

	IMPORT_C TInt MatchF(const TDesC16 &aDes) const;

	IMPORT_C TInt MatchC(const TDesC16 &aDes) const;

	IMPORT_C TInt MatchC(const TDesC16 &aPattern, TInt aWildChar, TInt aWildSequenceChar, 

						 TInt aEscapeChar, TInt aMaxLevel = 3, const TCollationMethod* aCollationMethod = NULL) const;

  	IMPORT_C TInt MatchC(const TDesC16 &aPattern, const TCollationMethod* aCollationMethod,

  						 TInt aMaxLevel = 3, TInt aWildChar = '?', TInt aWildSequenceChar = '*', TInt aEscapeChar = 0) const;

	IMPORT_C TInt Locate(TChar aChar) const;

	IMPORT_C TInt LocateReverse(TChar aChar) const;

	IMPORT_C TInt Find(const TDesC16 &aDes) const;

	IMPORT_C TInt Find(const TUint16 *aBuf,TInt aLen) const;

	IMPORT_C TPrefix HasPrefixC(const TDesC16& aPossiblePrefix, TInt aLevel, const TCollationMethod* aCollationMethod) const;

	IMPORT_C TPtrC16 Left(TInt aLength) const;

	IMPORT_C TPtrC16 Right(TInt aLength) const;

	IMPORT_C TPtrC16 Mid(TInt aPos) const;

	IMPORT_C TPtrC16 Mid(TInt aPos,TInt aLength) const;

	IMPORT_C TInt LocateF(TChar aChar) const;

	IMPORT_C TInt LocateReverseF(TChar aChar) const;

	IMPORT_C TInt FindF(const TDesC16 &aDes) const;

	IMPORT_C TInt FindF(const TUint16 *aBuf,TInt aLen) const;

	IMPORT_C TInt FindC(const TDesC16 &aDes) const;

	IMPORT_C TInt FindC(const TUint16 *aBuf,TInt aLen) const;

	IMPORT_C TInt FindC(const TUint16 *aText,TInt aLength, TInt aMaxLevel) const;

	IMPORT_C TInt FindC(const TDesC16 &aDes,TInt &aLengthFound, const TCollationMethod &aMethod,TInt aMaxLevel) const;

	IMPORT_C HBufC16 *Alloc() const;

	IMPORT_C HBufC16 *AllocL() const;

	IMPORT_C HBufC16 *AllocLC() const;

protected:

	inline TDesC16() {}

	inline TDesC16(TInt aType,TInt aLength);

// delay this for a while

#ifdef SYMBIAN_FIX_TDESC_CONSTRUCTORS

	inline TDesC16( const TDesC16& aOther) : iLength(aOther.iLength) {}

#endif

//	inline ~TDesC16() {}			Commented out for the moment since it breaks code

	inline TInt Type() const;

	inline void DoSetLength(TInt aLength);

	IMPORT_C const TUint16 &AtC(TInt anIndex) const;

private:

	TUint iLength;

	__DECLARE_TEST;

    };

//

class TPtrC16 : public TDesC16

/**

@publishedAll

@released

16-bit non-modifiable pointer descriptor.

This is a descriptor class intended for instantiation and encapsulates a

pointer to the 16-bit data that it represents. The data can live in ROM or RAM

and this location is separate from the descriptor object itself.

The data is intended to be accessed, but not changed, through this descriptor. 

The base class provides the functions through which data is accessed.

@see TPtr16

@see TDesC16

@see TDes16

@see TBufC16

@see TBuf16

@see HBufC16

*/

	{

public:

	IMPORT_C TPtrC16();

	IMPORT_C TPtrC16(const TDesC16 &aDes);

	IMPORT_C TPtrC16(const TUint16 *aString);

	IMPORT_C TPtrC16(const TUint16 *aBuf,TInt aLength);

	inline void Set(const TUint16 *aBuf,TInt aLength);

	inline void Set(const TDesC16 &aDes);

	inline void Set(const TPtrC16 &aPtr);

private:

	TPtrC16& operator=(const TPtrC16 &aDes);

protected:

	const TUint16 *iPtr;

private:

	__DECLARE_TEST;

	};

//

class TDes16Overflow

/**

@publishedAll

@released

An interface that defines an overflow handler for a 16-bit descriptor.

The interface encapsulates a function that is called when an attempt to append 

formatted text fails because the descriptor is already at its maximum length.

A derived class must provide an implementation for the Overflow() member function.

@see TDes16::AppendFormat

*/

	{

public:

	/**

	Handles the overflow.

	This function is called when the TDes16::AppendFormat() 

	variant that takes an overflow handler argument, fails.

	@param aDes The 16-bit modifiable descriptor whose overflow results in the 

	            call to this overflow handler.

	*/

	virtual void Overflow(TDes16 &aDes)=0;

	};

//

class TDes16IgnoreOverflow : public TDes16Overflow

/**

@publishedAll

@released

A derived class which provides an implementation for the Overflow() member function

where truncation is required.

@see TDes16::AppendFormat

*/

	{

public:

	/**

	Handles the overflow.

	This function is called when the TDes16::AppendFormat() 

	variant that takes an overflow handler argument, fails.

	@param aDes The 16-bit modifiable descriptor whose overflow results in the 

	            call to this overflow handler.

	*/

	IMPORT_C virtual void Overflow(TDes16 &aDes);

	};

//

class TRealFormat;

class TDes16 : public TDesC16

/**

@publishedAll

@released

Abstract base class for 16-bit modifiable descriptors.

The class encapsulates the data member containing the maximum length of data 

represented by a 16-bit descriptor. It also provides member functions through 

which the data can be modified.

The class adds to the behaviour provided by TDesC16.

This class cannot be instantiated as it is intended to form part of a class 

hierarchy; it provides a well defined part of descriptor behaviour. It can, 

however, be passed as an argument type for functions which need to both modify 

and access descriptor data.

@see TDes

@see TDesC8

@see TDesC16

*/

	{

public:

	inline TDes16& operator=(const TUint16 *aString);

	inline TDes16& operator=(const TDesC16 &aDes);

	inline TDes16& operator=(const TDes16 &aDes);

	inline TInt MaxLength() const;

	inline TInt MaxSize() const;

	inline const TUint16 &operator[](TInt anIndex) const;

	inline TUint16 &operator[](TInt anIndex);

	inline TDes16 &operator+=(const TDesC16 &aDes);

	IMPORT_C void Zero();

 	IMPORT_C void SetLength(TInt aLength);

 	IMPORT_C void SetMax();

	IMPORT_C void Copy(const TDesC8 &aDes);

	IMPORT_C void Copy(const TDesC16 &aDes);

	IMPORT_C void Copy(const TUint16 *aBuf,TInt aLength);

	IMPORT_C void Copy(const TUint16 *aString);

	IMPORT_C void Append(TChar aChar);

	IMPORT_C void Append(const TDesC16 &aDes);

	IMPORT_C void Append(const TUint16 *aBuf,TInt aLength);

	IMPORT_C void Fill(TChar aChar);

	IMPORT_C void Fill(TChar aChar,TInt aLength);

	IMPORT_C void FillZ();

	IMPORT_C void FillZ(TInt aLength);

	IMPORT_C void NumFixedWidth(TUint aVal,TRadix aRadix,TInt aWidth);

	IMPORT_C void AppendNumFixedWidth(TUint aVal,TRadix aRadix,TInt aWidth);

	IMPORT_C TPtr16 LeftTPtr(TInt aLength) const;

	IMPORT_C TPtr16 RightTPtr(TInt aLength) const;

	IMPORT_C TPtr16 MidTPtr(TInt aPos) const;

	IMPORT_C TPtr16 MidTPtr(TInt aPos,TInt aLength) const;

	IMPORT_C const TUint16 *PtrZ();

	IMPORT_C void CopyF(const TDesC16 &aDes);

	IMPORT_C void CopyC(const TDesC16 &aDes);

	IMPORT_C void CopyLC(const TDesC16 &aDes);

	IMPORT_C void CopyUC(const TDesC16 &aDes);

	IMPORT_C void CopyCP(const TDesC16 &aDes);

	IMPORT_C void AppendFill(TChar aChar,TInt aLength);

	IMPORT_C void ZeroTerminate();

	IMPORT_C void Swap(TDes16 &aDes);

	IMPORT_C void Fold();

	IMPORT_C void Collate();

	IMPORT_C void LowerCase();

	IMPORT_C void UpperCase();

	IMPORT_C void Capitalize();

	IMPORT_C void Repeat(const TDesC16 &aDes);

	IMPORT_C void Repeat(const TUint16 *aBuf,TInt aLength);

	IMPORT_C void Trim();

	IMPORT_C void TrimAll();

	IMPORT_C void TrimLeft();

	IMPORT_C void TrimRight();

	IMPORT_C void Insert(TInt aPos,const TDesC16 &aDes);

	IMPORT_C void Delete(TInt aPos,TInt aLength);

	IMPORT_C void Replace(TInt aPos,TInt aLength,const TDesC16 &aDes);

	IMPORT_C void Justify(const TDesC16 &aDes,TInt aWidth,TAlign anAlignment,TChar aFill);

	IMPORT_C void NumFixedWidthUC(TUint aVal,TRadix aRadix,TInt aWidth);

	IMPORT_C void NumUC(TUint64 aVal, TRadix aRadix=EDecimal);

	IMPORT_C TInt Num(TReal aVal,const TRealFormat &aFormat) __SOFTFP;

	IMPORT_C void Num(TInt64 aVal);

	IMPORT_C void Num(TUint64 aVal, TRadix aRadix);

	IMPORT_C void Format(TRefByValue<const TDesC16> aFmt,...);

	IMPORT_C void FormatList(const TDesC16 &aFmt,VA_LIST aList);

	IMPORT_C void AppendJustify(const TDesC16 &Des,TInt aWidth,TAlign anAlignment,TChar aFill);

	IMPORT_C void AppendJustify(const TDesC16 &Des,TInt aLength,TInt aWidth,TAlign anAlignment,TChar aFill);

	IMPORT_C void AppendJustify(const TUint16 *aString,TInt aWidth,TAlign anAlignment,TChar aFill);

	IMPORT_C void AppendJustify(const TUint16 *aString,TInt aLength,TInt aWidth,TAlign anAlignment,TChar aFill);

	IMPORT_C void AppendNumFixedWidthUC(TUint aVal,TRadix aRadix,TInt aWidth);

	IMPORT_C void AppendNumUC(TUint64 aVal, TRadix aRadix=EDecimal);

	IMPORT_C TInt AppendNum(TReal aVal,const TRealFormat &aFormat) __SOFTFP;

	IMPORT_C void AppendNum(TInt64 aVal);

	IMPORT_C void AppendNum(TUint64 aVal, TRadix aRadix);

	IMPORT_C void AppendFormat(TRefByValue<const TDesC16> aFmt,TDes16Overflow *aOverflowHandler,...);

	IMPORT_C void AppendFormat(TRefByValue<const TDesC16> aFmt,...);

	IMPORT_C void AppendFormatList(const TDesC16 &aFmt,VA_LIST aList,TDes16Overflow *aOverflowHandler=NULL);

	IMPORT_C TPtr8 Collapse();

protected:

	inline TDes16() {}

	inline TDes16(TInt aType,TInt aLength,TInt aMaxLength);

// delay this for a while

#ifdef SYMBIAN_FIX_TDESC_CONSTRUCTORS

	inline TDes16(const TDes16& aOther) : TDesC16(aOther), iMaxLength(aOther.iMaxLength) {}

#endif

	inline TUint16 *WPtr() const;

	void DoAppendNum(TUint64 aVal, TRadix aRadix, TUint aA, TInt aW);

	void DoPadAppendNum(TInt aLength, TInt aW, const TUint8* aBuf);

protected:

	TInt iMaxLength;

	__DECLARE_TEST;

    };

//

class TPtr16 : public TDes16

/**

@publishedAll

@released

16-bit modifiable pointer descriptor

This is a descriptor class intended for instantiation and encapsulates a

pointer to the 16-bit data that it represents. The data can live in ROM or

RAM and this location is separate from the descriptor object itself.

The data is intended to be accessed and modified through this descriptor. 

The base classes provide the functions through which the data can be

manipulated.

@see TPtr

@see TPtrC16

@see TDesC16

@see TDes16

@see TBufC16

@see TBuf16

@see HBufC16

*/

	{

public:

	IMPORT_C TPtr16(TUint16 *aBuf,TInt aMaxLength);

	IMPORT_C TPtr16(TUint16 *aBuf,TInt aLength,TInt aMaxLength);

	inline TPtr16& operator=(const TUint16 *aString);

	inline TPtr16& operator=(const TDesC16& aDes);

	inline TPtr16& operator=(const TPtr16& aDes);

	inline void Set(TUint16 *aBuf,TInt aLength,TInt aMaxLength);

	inline void Set(const TPtr16 &aPtr);

private:

	IMPORT_C TPtr16(TBufCBase16 &aLcb,TInt aMaxLength);

protected:

	TUint16 *iPtr;

private:

	friend class TBufCBase16;

	__DECLARE_TEST;

	};

//

class TBufCBase16 : public TDesC16

/**

@internalAll

*/

	{

protected:

	IMPORT_C TBufCBase16();

	inline TBufCBase16(TInt aLength);

	IMPORT_C TBufCBase16(const TUint16 *aString,TInt aMaxLength);

	IMPORT_C TBufCBase16(const TDesC16 &aDes,TInt aMaxLength);

	IMPORT_C void Copy(const TUint16 *aString,TInt aMaxLength);

	IMPORT_C void Copy(const TDesC16 &aDes,TInt aMaxLength);

	inline TPtr16 DoDes(TInt aMaxLength);

	inline TUint16 *WPtr() const;

	};

//

class RReadStream;

class HBufC16 : public TBufCBase16

/**

@publishedAll

@released

16-bit heap descriptor.

This is a descriptor class which provides a buffer of fixed length, allocated 

on the heap, for containing and accessing data.

The class is intended for instantiation.

Heap descriptors have the important property that they can be made larger 

or smaller, changing the size of the descriptor buffer. This is achieved by 

reallocating the descriptor. Unlike the behaviour of dynamic buffers, reallocation 

is not done automatically.

Data is intended to be accessed, but not modified; however, it can be completely 

replaced using the assignment operators of this class. The base class (TDesC16) provides 

the functions through which the data is accessed.

The descriptor is hosted by a heap cell, and the 16-bit data that the descriptor 

represents is part of the descriptor object itself. The size of the cell depends 

on the requested maximum length of the descriptor buffer when the descriptor 

is created or re-allocated.

It is important to note that the size of the allocated cell, and, therefore, 

the resulting maximum length of the descriptor, may be larger than requested 

due to the way memory is allocated in Symbian OS. The amount by which this 

may be rounded up depends on the platform and build type.

@see HBufC

@see TPtr16

@see TDesC16

*/

	{

public:

	IMPORT_C static HBufC16 *New(TInt aMaxLength);

	IMPORT_C static HBufC16 *NewL(TInt aMaxLength);

	IMPORT_C static HBufC16 *NewLC(TInt aMaxLength);

	IMPORT_C static HBufC16 *NewMax(TInt aMaxLength);

	IMPORT_C static HBufC16 *NewMaxL(TInt aMaxLength);

	IMPORT_C static HBufC16 *NewMaxLC(TInt aMaxLength);

	IMPORT_C static HBufC16 *NewL(RReadStream &aStream,TInt aMaxLength);

	IMPORT_C static HBufC16 *NewLC(RReadStream &aStream,TInt aMaxLength);

	IMPORT_C HBufC16& operator=(const TUint16 *aString);

	IMPORT_C HBufC16& operator=(const TDesC16 &aDes);

	inline HBufC16& operator=(const HBufC16 &aLcb);

	IMPORT_C HBufC16 *ReAlloc(TInt aMaxLength);

	IMPORT_C HBufC16 *ReAllocL(TInt aMaxLength);

	IMPORT_C TPtr16 Des();

private:

	inline HBufC16(TInt aLength);

private:

	TText16 iBuf[1];

	__DECLARE_TEST;

	};

//

/**

@internalComponent

*/

#define __Size16 (sizeof(TInt)/sizeof(TInt16))

/**

@internalComponent

*/

#define __Align16(s) ((((s)+__Size16-1)/__Size16)*__Size16)

//

template <TInt S>

class TBufC16 : public TBufCBase16

/**

@publishedAll

@released

16-bit non-modifiable buffer descriptor.

This is a descriptor class which provides a buffer of fixed length for

containing and accessing TUint16 data.

The class intended for instantiation. The 16-bit data that the descriptor 

represents is part of the descriptor object itself.