// Copyright (c) 1994-2009 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 "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:

 // e32\common\des8.cpp

 // 

 //

 #include "common.h"

 #include <e32des8_private.h>

 #ifndef __KERNEL_MODE__

 #include <collate.h>

 #else

 #include <kernel/kern_priv.h>

 #endif

 #include <unicode.h>

 // Folding/Collation for 8 bit characters

 extern const TUint8 __FoldCollTab8[256];

 const TUint8 __FoldCollTab8[256] =

 	{

 	0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07, // 0x00

 	0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,

 	0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17, // 0x10

 	0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,

 	0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27, // 0x20

 	0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,

 	0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37, // 0x30

 	0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,

 	0x40,0x61,0x62,0x63,0x64,0x65,0x66,0x67, // 0x40

 	0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,

 	0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77, // 0x50

 	0x78,0x79,0x7a,0x5b,0x5c,0x5d,0x5e,0x5f,

 	0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67, // 0x60

 	0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,

 	0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77, // 0x70

 	0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,

 	0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, // 0x80

 	0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,

 	0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97, // 0x90

 	0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,

 	0x20,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7, // 0xa0

 	0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,

 	0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7, // 0xb0

 	0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf,

 	0x61,0x61,0x61,0x61,0x61,0x61,0xe6,0x63, // 0xc0

 	0x65,0x65,0x65,0x65,0x69,0x69,0x69,0x69,

 	0xf0,0x6e,0x6f,0x6f,0x6f,0x6f,0x6f,0xd7, // 0xd0

 	0xf8,0x75,0x75,0x75,0x75,0x79,0xfe,0xdf,

 	0x61,0x61,0x61,0x61,0x61,0x61,0xe6,0x63, // 0xe0

 	0x65,0x65,0x65,0x65,0x69,0x69,0x69,0x69,

 	0xf0,0x6e,0x6f,0x6f,0x6f,0x6f,0x6f,0xf7, // 0xf0

 	0xf8,0x75,0x75,0x75,0x75,0x79,0xfe,0x79

 	};

 #ifndef __KERNEL_MODE__

 inline TUint8* memCopy(TUint8* aPtr, const TUint8* aSrc, TInt aLength)

 //

 // Copy 8 bit values.

 //

 	{

 	return Mem::Copy(aPtr, aSrc, aLength);

 	}

 #endif

 #if (defined(__KERNEL_MODE__) && !defined(__DES8_MACHINE_CODED__)) | defined(__EABI_CTORS__)

 inline TInt StringLength(const TUint8* aPtr)

 	{

 	const TUint8* p = aPtr;

 	while (*p)

 		++p;

 	return p-aPtr;

 	}

 #endif

 inline TDesC8::TDesC8(TInt aType,TInt aLength)

 	:iLength(aLength|(aType<<KShiftDesType8))

 	{}

 inline TInt TDesC8::Type() const

 //

 // Return the descriptor type

 //

 	{

 	return(iLength>>KShiftDesType8);

 	}

 inline TDes8::TDes8(TInt aType,TInt aLength,TInt aMaxLength)

 	: TDesC8(aType,aLength),iMaxLength(aMaxLength)

 	{}

 // Class TBufCBase8

 inline TBufCBase8::TBufCBase8(TInt aLength)

 	:TDesC8(EBufC,aLength)

 	{}

 inline TUint8* TBufCBase8::WPtr() const

 	{return const_cast<TUint8*>(Ptr());}

 #ifndef __DES8_MACHINE_CODED__

 EXPORT_C const TUint8* TDesC8::Ptr() const

 /**

 Gets a pointer to the data represented by the descriptor.

 The data cannot be changed through the returned pointer.

 @return A pointer to the data

 */

 	{

 	switch (Type())

 		{

 	case EBufC:

 		return(&((SBufC8 *)this)->buf[0]);

 	case EPtrC:

 		return(((SPtrC8 *)this)->ptr);

 	case EPtr:

 		return(((SPtr8 *)this)->ptr);

 	case EBuf:

 		return(&((SBuf8 *)this)->buf[0]);

 	case EBufCPtr:

 		return(&((SBufCPtr8 *)this)->ptr->buf[0]);

 		}

 	Panic(ETDes8BadDescriptorType);

 	return(NULL);

 	}

 EXPORT_C const TUint8 &TDesC8::AtC(TInt anIndex) const

 //

 // Return a reference to the character in the buffer.

 //

 	{

 	__ASSERT_ALWAYS(anIndex>=0 && anIndex<Length(),Panic(ETDes8IndexOutOfRange));

 	return(Ptr()[anIndex]);

 	}

 EXPORT_C TInt TDesC8::Compare(const TDesC8 &aDes) const

 /**

 Compares this descriptor's data with the specified descriptor's data.

 The comparison proceeds on a byte for byte basis. The result of the comparison 

 is based on the difference of the first bytes to disagree.

 Two descriptors are equal if they have the same length and content. Where 

 two descriptors have different lengths and the shorter descriptor's data

 matches the first part of the longer descriptor's data, the shorter is

 considered to be less than the longer.

 @param aDes The 8-bit non-modifable descriptor whose data is to be compared 

             with this descriptor's data.

 @return Positive, if this descriptor is greater than the specified descriptor. 

         Negative, if this descriptor is less than the specified descriptor.

         Zero, if both descriptors have the same length and the their contents

         are the same.

 */

 	{

 	return memcompare(Ptr(), Length(), aDes.Ptr(), aDes.Length());

 	}

 #ifndef __KERNEL_MODE__

 EXPORT_C TInt TDesC8::CompareF(const TDesC8 &aDes) const

 /**

 Compares this descriptor's folded data with the specified descriptor's folded 

 data. 

 Note that folding is locale-independent behaviour. It is also important to 

 note that there can be no guarantee that folding is in any way culturally 

 appropriate, and should not be used for comparing strings in natural language; 

 use CompareC() for this.

 @param aDes The 8-bit non modifable descriptor whose data is to be compared 

             with this descriptor's data. 

 @return Positive, if this descriptor is greater than the specified descriptor. 

         Negative, if this descriptor is less than the specified descriptor.

         Zero, if both descriptors have the same length and the their contents

         are the same.

 @see TDesC8::Compare()

 */

 	{

 	return(Mem::CompareF(Ptr(),Length(),aDes.Ptr(),aDes.Length()));

 	}

 EXPORT_C TInt TDesC8::CompareC(const TDesC8 &aDes) const

 /**

 Compares this descriptor's data with the specified descriptor's data using 

 the standard collation method for narrow text appropriate to the current locale.

 @param aDes The 8-bit non modifable descriptor whose data is to be compared 

             with this descriptor's data. 

 @return Positive, if this descriptor is greater than the specified descriptor. 

         Negative, if this descriptor is less than the specified descriptor.

         Zero, if both descriptors have the same length and the their contents

         are the same.

 @see TDesC8::Compare()

 @deprecated

 */

 	{

 	return(Mem::CompareC(Ptr(),Length(),aDes.Ptr(),aDes.Length()));

 	}

 #endif

 #endif

 EXPORT_C TInt TDesC8::Find(const TUint8 *pS,TInt aLenS) const

 /**

 Searches for the first occurrence of the specified data sequence within this 

 descriptor.

 Searching always starts at the beginning of this descriptor's data.

 @param pS    A pointer to a location containing the data sequence to be searched 

              for.

 @param aLenS The length of the data sequence to be searched for. This value 

              must not be negative, otherwise the function raises a panic.

 @return The offset of the data sequence from the beginning of this descriptor's 

         data. KErrNotFound, if the data sequence cannot be found.

 @panic  USER 29 if aLenS is negative. 

 */

 	{

 	if (!aLenS)

 		return(0);

 	__ASSERT_ALWAYS(aLenS>0,Panic(ETDes8LengthNegative));

 	const TUint8 *pB=Ptr();

 	TInt aLenB=Length();

 	const TUint8 *pC=pB-1;			// using pre-increment addressing

 	TInt i=aLenB-aLenS;

 	if (i>=0)

 		{

 		const TUint8* pEndS=pS+aLenS-1;		// using pre-increment addressing

 		const TUint8 *pEndB=pB+i;			// using pre-increment addressing

 		TUint s=*pS;

 		for (;;)

 			{

 			do

 				{

 				if (pC==pEndB)

 					return KErrNotFound;

 				} while (*++pC!=s);

 			const TUint8 *p1=pC;

 			const TUint8 *p2=pS;

 			do

 				{

 				if (p2==pEndS)

 					return (pC-pB);

 				} while (*++p1==*++p2);

 			}

 		}

 	return(KErrNotFound);

 	}

 EXPORT_C TInt TDesC8::Find(const TDesC8 &aDes) const

 /**

 Searches for the first occurrence of the specified data sequence within this 

 descriptor.

 Searching always starts at the beginning of this descriptor's data.

 @param aDes The 8-bit non modifable descriptor containing the data sequence 

             to be searched for. 

 @return The offset of the data sequence from the beginning of this descriptor's 

         data. KErrNotFound, if the data sequence cannot be found.

 */

 	{

 	return(Find(aDes.Ptr(),aDes.Length()));

 	}

 const TUint8* convTable(TMatchType aType)

 	{

 	switch (aType)

 		{

 		case EMatchFolded:

 		case EMatchCollated: return __FoldCollTab8;

 		default: return NULL;

 		}

 	}

 inline TUint conv(const TUint8* aStr,const TUint8* aConv)

 	{

 	TUint c=*aStr;

 	return aConv ? aConv[c] : c;

 	}

 inline TUint lookup(const TUint8* aStr,const TUint8* aConv)

 	{

 	return aConv[*aStr];

 	}

 TInt DoMatch8(const TDesC8 &aLeftD,const TDesC8 &aRightD,TMatchType aType)

 	{

 	const TUint8* table=convTable(aType);

 	const TUint8* pRight=aRightD.Ptr();

 	const TUint8* pM=pRight-1;				// pre-increment addressing

 	const TUint8* pP=pM+aRightD.Length();

 	const TUint8* pLeft=aLeftD.Ptr()-1;		// pre-increment addressing

 	const TUint8* pB=pLeft;	

 	const TUint8* pE=pB+aLeftD.Length();

 	// Match any pattern up to the first star

 	TUint c;

 	for (;;)

 		{

 		if (pM==pP)		// exhausted the pattern

 			return pB==pE ? 0 : KErrNotFound;

 		TUint c=conv(++pM,table);

 		if (c==KMatchAny)

 			break;

 		if (pB==pE)			// no more input

 			return KErrNotFound;

 		if (c!=conv(++pB,table) && c!=KMatchOne)	// match failed

 			return KErrNotFound;

 		}

 	// reached a star

 	if (pM==pP)

 		return 0;

 	TInt r=pM==pRight ? -1 : 0;

 	for (;;)

 		{

 		c=conv(++pM,table);

 		if (c==KMatchAny)

 			{

 star:		if (pM==pP)		// star at end of pattern, always matches

 				return Max(r,0);

 			if (r<-1)		// skipped some '?', matches at beginning

 				r=0;

 			continue;

 			}

 		if (pB==pE)			// no more input

 			return KErrNotFound;

 		if (c==KMatchOne)

 			{				// skip a character in the input

 			if (pM==pP)

 				return r+((r>=0) ? 0 : (pE-pLeft));

 			++pB;

 			if (r<0)

 				--r;

 			continue;

 			}

 	// Matching a non-wild character

 		for (;;)

 			{

 			if (table)	// pull this test out of the tight loop (10-20% faster)

 				{

 				while (lookup(++pB,table)!=c)

 					{

 					if (pB==pE)				// no more input

 						return KErrNotFound;

 					}

 				}

 			else

 				{

 				while (*++pB!=c)

 					{

 					if (pB==pE)				// no more input

 						return KErrNotFound;

 					}

 				}

 			// Try to match up to the next star

 			const TUint8* pb=pB;

 			const TUint8* pm=pM;

 			for (;;)

 				{

 				if (pm<pP)

 					{

 					TUint cc=conv(++pm,table);

 					if (cc==KMatchAny)

 						{	// sub-match successful, back to main loop

 						r+=(r>=0 ? 0 : pB-pLeft);

 						pB=pb;

 						pM=pm;

 						goto star;

 						}

 					if (pb==pE)

 						return KErrNotFound;	// no more input

 					if (cc!=conv(++pb,table) && cc!=KMatchOne)

 						break;	// sub-match failed, try next input character

 					}

 				else if (pb==pE)	// end of matching pattern

 					return r+(r>=0 ? 0 : pB-pLeft);	// end of input, so have a match

 				else

 					break;		// try next input character

 				}

 			}

 		}

 	}

 EXPORT_C TInt TDesC8::Match(const TDesC8 &aDes) const

 /**

 Searches this descriptor's data for a match with the match pattern supplied 

 in the specified descriptor.

 The match pattern can contain the wildcard characters "*" and "?", where "*" 

 matches zero or more consecutive occurrences of any character and "?" matches 

 a single occurrence of any character.

 Note that there is no 'escape character', which means that it is not possible

 to match either the "*" character itself or the "?" character itself using

 this function.

 @param aDes An 8-bit non-modifable descriptor containing the match pattern.

 @return If a match is found, the offset within this descriptor's data where 

         the match first occurs. KErrNotFound, if there is no match.

 */

 	{

 	return DoMatch8(*this,aDes,EMatchNormal);

 	}

 EXPORT_C TInt TDesC8::MatchF(const TDesC8 &aDes) const

 /**

 Searches this descriptor's folded data for a match with the folded match 

 pattern supplied in the specified descriptor.

 The match pattern can contain the wildcard characters "*" and "?", where "*" 

 matches zero or more consecutive occurrences of any character and "?" matches 

 a single occurrence of any character.

 Note that folding is locale-independent behaviour. It is also important to 

 note that there can be no guarantee that folding is in any way culturally 

 appropriate, and should not be used for matching strings in natural language; 

 use MatchC() for this.

 Note that there is no 'escape character', which means that it is not possible

 to match either the "*" character itself or the "?" character itself using

 this function.

 @param aDes An 8-bit non-modifable descriptor containing the match pattern. 

 @return If a match is found, the offset within this descriptor's data where 

         the match first occurs. KErrNotFound, if there is no match. 

 @see TDesC8::MatchC()

 */

 	{

 	return DoMatch8(*this,aDes,EMatchFolded);

 	}

 EXPORT_C TInt TDesC8::MatchC(const TDesC8 &aPattern) const

 /**

 Searches this descriptor's collated data for a match with the collated match 

 pattern supplied in the specified descriptor.

 The function uses the standard collation method for narrow text appropriate to 

 the current locale.

 The match pattern can contain the wildcard characters "*" and "?", where "*" 

 matches zero or more consecutive occurrences of any character and "?" matches 

 a single occurrence of any character.

 Note that there is no 'escape character', which means that it is not possible

 to match either the "*" character itself or the "?" character itself using

 this function.

 @param aPattern An 8-bit non-modifable descriptor containing the match pattern. 

 @return If a match is found, the offset within this descriptor's data where 

         the match first occurs. KErrNotFound, if there is no match.

 @deprecated

 */

 	{

 #ifndef __KERNEL_MODE__

 	return MatchF(aPattern);

 #else

 	return DoMatch8(*this,aPattern,EMatchCollated);

 #endif

 	}

 #ifndef __KERNEL_MODE__

 EXPORT_C TInt TDesC8::FindF(const TUint8 *pS,TInt aLenS) const

 /**

 Searches for the first occurrence of the specified folded data sequence within 

 this descriptor's folded data.

 Searching always starts at the beginning of this descriptor's data.

 Note that folding is locale-independent behaviour. It is also important to 

 note that there can be no guarantee that folding is in any way culturally 

 appropriate, and should not be used for finding strings in natural language; 

 use FindC() for this.

 @param pS    A pointer to a location containing the data sequence to be

              searched for.

 @param aLenS The length of the data sequence to be searched for. This value 

              must not be negative, otherwise the function raises a panic.

 @return The offset of the data sequence from the beginning of this descriptor's 

         data. KErrNotFound, if the data sequence cannot be found. Zero, if the

         length of the search data sequence is zero.

 @panic USER 29 if aLenS is negative

 @see TDesC8::FindC()

 */

 	{

 	if (!aLenS)

 		return(0);

 	const TUint8* table=convTable(EMatchFolded);

 	const TUint8 *pB=Ptr();

 	TInt aLenB=Length();

 	const TUint8 *pC=pB-1;			// using pre-increment addressing

 	TInt i=aLenB-aLenS;

 	if (i>=0)

 		{

 		const TUint8* pEndS=pS+aLenS-1;		// using pre-increment addressing

 		const TUint8 *pEndB=pB+i;			// using pre-increment addressing

 		TUint s=lookup(pS,table);

 		for (;;)

 			{

 			do

 				{

 				if (pC==pEndB)

 					return KErrNotFound;

 				} while (lookup(++pC,table)!=s);

 			const TUint8 *p1=pC;

 			const TUint8 *p2=pS;

 			do

 				{

 				if (p2==pEndS)

 					return (pC-pB);

 				} while (lookup(++p1,table)==lookup(++p2,table));

 			}

 		}

 	return(KErrNotFound);

 	}

 EXPORT_C TInt TDesC8::FindF(const TDesC8 &aDes) const

 /**

 Searches for the first occurrence of the specified folded data sequence within 

 this descriptor's folded data. 

 Searching always starts at the beginning of this descriptor's data.

 Note that folding is locale-independent behaviour. It is also important to 

 note that there can be no guarantee that folding is in any way culturally 

 appropriate, and should not be used for finding strings in natural language; 

 use FindC() for this.

 @param aDes The 8-bit non-modifable descriptor containing the data sequence 

             to be searched for. 

 @return The offset of the data sequence from the beginning of this descriptor's 

         data. KErrNotFound, if the data sequence cannot be found. Zero, if the 

         length of the search data sequence is zero.

 @see TDesC8::FindC()

 */

 	{

 	return(FindF(aDes.Ptr(),aDes.Length()));

 	}

 EXPORT_C TInt TDesC8::FindC(const TUint8* aText,TInt aLength) const

 /**

 Searches for the first occurrence of the specified collated data sequence within 

 this descriptor's collated data.

 Searching always starts at the beginning of this descriptor's data. The function 

 uses the standard collation method for narrow text appropriate to the current 

 locale.

 @param aText   A pointer to a location containing the data sequence to be

                searched for.

 @param aLength The length of the data sequence to be searched for.

 @return The offset of the data sequence from the beginning of this descriptor's 

         data. KErrNotFound, if the data sequence cannot be found.

 @panic USER 29 if aLength is negative.

 @deprecated

 */

 	{

 	return FindF(aText, aLength);

 	}

 EXPORT_C TInt TDesC8::FindC(const TDesC8 &aDes) const

 /**

 Searches for the first occurrence of the specified collated data sequence within 

 this descriptor's collated data.

 Searching always starts at the beginning of this descriptor's data. The function 

 uses the standard collation method for narrow text appropriate to the current 

 locale.

 @param aDes The 8-bit non-modifable descriptor containing the data sequence 

             to be searched for. 

 @return The offset of the data sequence from the beginning of this descriptor's 

         data. KErrNotFound, if the data sequence cannot be found.

 @deprecated

 */

 	{

 	return(FindC(aDes.Ptr(),aDes.Length()));

 	}

 EXPORT_C TInt TDesC8::LocateF(TChar aChar) const

 /**

 Searches for the first occurrence of a folded character within this

 descriptor's folded data.

 The search starts at the beginning of the data,i.e. at the leftmost position.

 Note that folding is locale-independent behaviour. It is also important to 

 note that there can be no guarantee that folding is in any way culturally 

 appropriate, and should not be used for searching strings in natural language.

 @param aChar The character to be found.

 @return The offset of the character position from the beginning of the data.

         KErrNotFound, if no matching character can be found.

 */

 	{

 	TUint c = User::Fold(aChar);

 	if(c>=0x100)

 		return KErrNotFound;

 	const TUint8 *pBuf=Ptr();

 	const TUint8 *pB=pBuf-1;

 	const TUint8 *pE=pB+Length();

 	const TUint8* table=__FoldCollTab8;

 	do

 		{

 		if (pB==pE)

 			return KErrNotFound;

 		} while (table[*++pB]!=c);

 	return pB-pBuf;

 	}

 #endif	// __KERNEL_MODE__

 #ifndef __DES8_MACHINE_CODED__

 EXPORT_C TInt TDesC8::Locate(TChar aChar) const

 /**

 Searches for the first occurrence of a character within this descriptor's

 data.

 The search starts at the beginning of the data, i.e. at the leftmost position.

 @param aChar The character to be found. 

 @return The offset of the character position from the beginning of the data.

         KErrNotFound, if no matching character can be found.

 */

 	{

 	const TUint8 *pBuf=Ptr();

 	const TUint8 *pB=pBuf-1;

 	const TUint8 *pE=pB+Length();

 	do

 		{

 		if (pB==pE)

 			return KErrNotFound;

 		} while (*++pB!=aChar);

 	return pB-pBuf;

 	}

 #endif

 #ifndef __DES8_MACHINE_CODED__

 EXPORT_C TInt TDesC8::LocateReverse(TChar aChar) const

 /**

 Searches for the first occurrence of a character within this descriptor's data, 

 searching from the end of the data.

 The search starts at the rightmost position.

 @param aChar The character to be found.

 @return The offset of the character position from the beginning of the data.

         KErrNotFound, if no matching character can be found.

 */

 	{

 	TInt len=Length();

 	if (len==0)

 		return(KErrNotFound);

 	const TUint8 *pB=Ptr();

 	const TUint8 *pE=pB+len-1;

 	while (pE>=pB)

 		{

 		if (*pE==aChar)

 			break;

 		pE--;

 		}

 	return(pE<pB ? KErrNotFound : pE-pB);

 	}

 #endif

 #ifndef __KERNEL_MODE__

 EXPORT_C TInt TDesC8::LocateReverseF(TChar aChar) const

 /**

 Searches for the first occurrence of a folded character within this descriptor's 

 folded data, searching from the end of the data.

 The search starts at the rightmost position. 

 Note that folding is locale-independent behaviour. It is also important to 

 note that there can be no guarantee that folding is in any way culturally 

 appropriate, and should not be used for searching strings in natural language.

 @param aChar The character to be found 

 @return The offset of the character position from the beginning of the data.

         KErrNotFound, if no matching character can be found

 */

 	{

 	TInt len=Length();

 	if (len==0)

 		return(KErrNotFound);

 	const TUint8 *pB=Ptr();

 	const TUint8 *pE=pB+len-1;

 	const TUint8* table=__FoldCollTab8;

 	TUint c = table[aChar];

 	while (pE>=pB)

 		{

 		if (table[*pE]==c)

 			break;

 		pE--;

 		}

 	return(pE<pB ? KErrNotFound : pE-pB);

 	}

 EXPORT_C HBufC8 *TDesC8::Alloc() const

 /**

 Creates a new 8-bit heap descriptor and initialises it with a copy of this 

 descriptor's data.

 @return A pointer to the new 8 bit heap descriptor, if creation is successful. 

         NULL, if creation of the descriptor fails.

 */

 	{

 	HBufC8 *pH=HBufC8::New(Length());

 	if (pH)

 		*pH=(*this);

 	return(pH);

 	}

 EXPORT_C HBufC8 *TDesC8::AllocL() const

 /**

 Creates a new 8-bit heap descriptor and initialises it with a copy of this 

 descriptor's data.

 The function leaves, if creation of the descriptor fails.

 @return A pointer to the 8-bit heap descriptor, if creation is successful.

 */

 	{

 	HBufC8 *pH=HBufC8::NewL(Length());

 	*pH=(*this);

 	return(pH);

 	}

 EXPORT_C HBufC8 *TDesC8::AllocLC() const

 /**

 Creates a new 8-bit heap descriptor, initialises it with a copy of this 

 descriptor's data, and puts a pointer to the descriptor onto the cleanup stack.

 The function leaves, if creation of the descriptor fails.

 @return A pointer to the 8 bit heap descriptor, if creation is successful. 

         The pointer is also put onto the cleanup stack.

 */

 	{

 	HBufC8 *pH=HBufC8::NewLC(Length());

 	*pH=(*this);

 	return(pH);

 	}

 #endif	// __KERNEL_MODE__

 #if !defined(__DES8_MACHINE_CODED__)

 EXPORT_C TPtrC8 TDesC8::Left(TInt aLength) const

 /**

 Extracts the leftmost part of the data. 

 The function does not cut or remove any data but constructs a non-modifiable 

 pointer descriptor to represent the leftmost part of the data.

 @param aLength The length of the data to be extracted. If this value

                is greater than the length of the descriptor, the function

                extracts the whole of the descriptor.

 @return The 8-bit non-modifiable pointer descriptor representing the leftmost 

         part of the data.

 @panic USER 22 if aLength is negative. 

 */

 	{

 	__ASSERT_ALWAYS(aLength>=0,Panic(ETDes8PosOutOfRange));

 	return(TPtrC8(Ptr(),Min(aLength,Length())));

 	}

 EXPORT_C TPtrC8 TDesC8::Right(TInt aLength) const

 /**

 Extracts the rightmost part of the data.

 The function does not cut or remove any data but constructs a non-modifiable 

 pointer descriptor to represent the rightmost part of the data.

 @param aLength The length of data to be extracted. If this value

                is greater than the length of the descriptor, the function 

                extracts the whole of the descriptor. 

 @return The 8 bit non-modifiable pointer descriptor representing the rightmost 

         part of the data.

 @panic USER 22 if aLength is negative. 

 */

 	{

 	__ASSERT_ALWAYS(aLength>=0,Panic(ETDes8PosOutOfRange));

 	TInt len=Length();

 	if (aLength>len)

 		aLength=len;

     return(TPtrC8(Ptr()+len-aLength,aLength));

 	}

 EXPORT_C TPtrC8 TDesC8::Mid(TInt aPos) const

 /**

 Extracts a portion of the data.

 The function does not cut or remove any data but constructs a non-modifiable 

 pointer descriptor to represent the defined portion.

 The portion is identified by its starting position and by the length of the 

 remainder of the data starting from the specified position.

 @param aPos The starting position of the data to be extracted. This is an 

             offset value; a zero value refers to the leftmost data position. 

 @return The 8-bit non-modifiable pointer descriptor representing the specified 

         portion of the data.

 @panic USER 22  if aPos is negative or aPos is greater than the

                 length of the descriptor.       

 */

 	{

 	TInt len=Length();

 	__ASSERT_ALWAYS(aPos>=0 && aPos<=len,Panic(ETDes8PosOutOfRange));

     return(TPtrC8(Ptr()+aPos,len-aPos));

 	}

 EXPORT_C TPtrC8 TDesC8::Mid(TInt aPos,TInt aLength) const

 /**

 Extracts a portion of the data.

 The function does not cut or remove any data but constructs a non-modifiable 

 pointer descriptor to represent the defined portion.

 The portion is identified by its starting position and by its length.

 @param aPos    The starting position of the data to be extracted. This is an 

                offset value; a zero value refers to the leftmost data position. 

 @param aLength The length of data to be extracted.

 @return The 8 bit non-modifiable pointer descriptor representing the specified 

         portion of the data.

 @panic USER 22  if aPos is negative or aPos plus aLength is greater than the

                 length of the descriptor.

 */

 	{

 	__ASSERT_ALWAYS(aPos>=0 && (aPos+aLength)<=Length(),Panic(ETDes8PosOutOfRange));

     return(TPtrC8(Ptr()+aPos,aLength));

 	}

 #endif  // !defined(__DES8_MACHINE_CODED__)

 #if !defined( __DES8_MACHINE_CODED__) | defined(__EABI_CTORS__)

 EXPORT_C TBufCBase8::TBufCBase8()

 //

 // Constructor

 //

 	: TDesC8(EBufC,0)

 	{}

 EXPORT_C TBufCBase8::TBufCBase8(const TUint8 *aString,TInt aMaxLength)

 //

 // Constructor

 //

 	: TDesC8(EBufC,0)

 	{

 	Copy(aString,aMaxLength);

 	}

 EXPORT_C TBufCBase8::TBufCBase8(const TDesC8 &aDes,TInt aMaxLength)

 //

 // Constructor

 //

 	: TDesC8(EBufC,0)

 	{

 	Copy(aDes,aMaxLength);

 	}

 #endif 

 #ifndef __DES8_MACHINE_CODED__

 EXPORT_C void TBufCBase8::Copy(const TUint8 *aString,TInt aMaxLength)

 //

 // Copy from a string.

 //

 	{

 	TInt len=STRING_LENGTH(aString);

 	__ASSERT_ALWAYS(len<=aMaxLength,Panic(ETDes8Overflow));

 	memmove(WPtr(), aString, len);

 	DoSetLength(len);

 	}

 EXPORT_C void TBufCBase8::Copy(const TDesC8 &aDes,TInt aMaxLength)

 //

 // Copy from a descriptor.

 //

 	{

 	TInt len=aDes.Length();

 	__ASSERT_ALWAYS(len<=aMaxLength,Panic(ETDes8Overflow));

 	memmove(WPtr(), aDes.Ptr(), len);

 	DoSetLength(len);

 	}

 #endif

 #ifndef __KERNEL_MODE__

 inline HBufC8::HBufC8(TInt aLength)

 	:TBufCBase8(aLength)

 	{}

 EXPORT_C HBufC8 *HBufC8::New(TInt aMaxLength)

 /**

 Creates, and returns a pointer to, a new 8-bit heap descriptor.

 The heap descriptor is empty and its length is zero.

 Data can, subsequently, be assigned into it using the assignment operators.

 @param aMaxLength The requested maximum length of the descriptor. Note that 

                   the resulting heap cell size and, therefore, the resulting

                   maximum length of the descriptor may be larger

                   than requested.

 @return A pointer to the new 8-bit heap descriptor. NULL, if the 8-bit heap 

         descriptor cannot be created.

 @panic USER 30 if aMaxLength is negative.

 @see HBufC8::operator=()

 */

 	{

 	__ASSERT_ALWAYS(aMaxLength>=0,Panic(ETDes8MaxLengthNegative));

 	return new(STD_CLASS::Alloc(_FOFF(HBufC8,iBuf[aMaxLength]))) HBufC8(0);

 	}

 EXPORT_C HBufC8 *HBufC8::NewL(TInt aMaxLength)

 /** 

 Creates, and returns a pointer to, a new 8-bit heap descriptor, and leaves 

 on failure.

 The heap descriptor is empty and its length is zero.

 Data can, subsequently, be assigned into it using the assignment operators.

 @param aMaxLength The requested maximum length of the descriptor. Note that 

                   the resulting heap cell size and, therefore, the resulting

                   maximum length of the descriptor may be larger

                   than requested.

 @return A pointer to the new 8 bit heap descriptor. The function leaves, if 

         the new 8-bit heap descriptor cannot be created.

 @panic USER 30 if aMaxLength is negative.

 @see HBufC8::operator=()

 */

 	{

 	return static_cast<HBufC8*>(User::LeaveIfNull(New(aMaxLength)));

 	}

 EXPORT_C HBufC8 *HBufC8::NewLC(TInt aMaxLength)

 /**

 Creates, adds a pointer onto the cleanup stack, and returns a pointer to, a 

 new 8 bit heap descriptor; leaves on failure.

 The heap descriptor is empty and its length is zero.

 Data can, subsequently, be assigned into it using the assignment operators.

 @param aMaxLength The requested maximum length of the descriptor. Note that 

                   the resulting heap cell size and, therefore, the resulting

                   maximum length of the descriptor may be larger

                   than requested.

 @return A pointer to the new 8-bit heap descriptor. The function leaves, if 

         the new 8-bit heap descriptor cannot be created.

 @panic USER 30 if aMaxLength is negative.

 @see HBufC8::operator=()

 */

 	{

 	HBufC8* buf=NewL(aMaxLength);

 	CleanupStack::PushL(buf);

 	return buf;

 	}

 EXPORT_C HBufC8 *HBufC8::NewMax(TInt aMaxLength)

 /**

 Creates, and returns a pointer to, a new 8-bit heap descriptor.

 No data is assigned into the new descriptor but its length

 is set to aMaxLength.

 Data can, subsequently, be assigned into it using the assignment operators.

 @param aMaxLength The requested maximum length of the descriptor. Note that 

                   the resulting heap cell size and, therefore, the resulting

                   maximum length of the descriptor may be larger

                   than requested. This also means that the resulting maximum

                   length of the descriptor may be greater than its length.

 @return A pointer to the new 8-bit heap descriptor. NULL, if the new 8-bit 

         heap descriptor cannot be created.

 @panic USER 30 if aMaxLength is negative.

 @see HBufC8::operator=()

 */

 	{

 	__ASSERT_ALWAYS(aMaxLength>=0,Panic(ETDes8MaxLengthNegative));

 	return new(STD_CLASS::Alloc(_FOFF(HBufC8,iBuf[aMaxLength]))) HBufC8(aMaxLength);

 	}

 EXPORT_C HBufC8 *HBufC8::NewMaxL(TInt aMaxLength)

 /**

 Creates, and returns a pointer to, a new 8-bit heap descriptor;

 leaves on failure.

 No data is assigned into the new descriptor but its length

 is set to aMaxLength.

 Data can, subsequently, be assigned into it using the assignment operators.

 @param aMaxLength The requested maximum length of the descriptor. Note that 

                   the resulting heap cell size and, therefore, the resulting

                   maximum length of the descriptor may be larger

                   than requested. This also means that the resulting maximum

                   length of the descriptor may be greater than its length.

 @return A pointer to the new 8-bit heap descriptor. The function leaves, if 

         the new 8-bit heap descriptor cannot be created.

 @panic USER 30 if aMaxLength is negative.

 @see HBufC8::operator=()

 */

 	{

 	return static_cast<HBufC8*>(User::LeaveIfNull(NewMax(aMaxLength)));

 	}

 EXPORT_C HBufC8 *HBufC8::NewMaxLC(TInt aMaxLength)

 /**

 Creates, adds a pointer onto the cleanup stack and returns a pointer to, a 

 new 8-bit heap descriptor; leaves on failure.

 No data is assigned into the new descriptor but its length

 is set to aMaxLength.

 Data can, subsequently, be assigned into it using the assignment operators.

 @param aMaxLength The requested maximum length of the descriptor. Note that 

                   the resulting heap cell size and, therefore, the resulting

                   maximum length of the descriptor may be larger than requested.

                   This also means that the resulting maximum

                   length of the descriptor may be greater than its length.

 @return A pointer to the new 8-bit heap descriptor. This is also put onto the 

         cleanup stack. The function leaves, if the new 8-bit heap descriptor

         cannot be created.

 @panic USER 30 if aMaxLength is negative.

 @see HBufC8::operator=()

 */

 	{

 	HBufC8* buf=NewMaxL(aMaxLength);

 	CleanupStack::PushL(buf);

 	return buf;

 	}

 EXPORT_C HBufC8 &HBufC8::operator=(const TUint8 *aString)

 /**

 Copies data into this 8-bit heap descriptor replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 Note that the maximum length of this (target) descriptor is the length

 of the descriptor buffer in the allocated host heap cell; this may be greater

 than the maximum length specified when this descriptor was created or

 last re-allocated.

 @param aString A pointer to a zero-terminated string. 

 @return A reference to this 8 bit heap descriptor.

 @panic USER 23  if the length of the string, excluding the zero terminator,

                 is greater than the maximum length of this (target) descriptor,

 */

 	{

 	Copy(aString,(STD_CLASS::AllocLen(this)-sizeof(TDesC8))/sizeof(TUint8));

 	return(*this);

 	}

 EXPORT_C HBufC8 &HBufC8::operator=(const TDesC8 &aDes)

 /**

 Copies data into this 8-bit heap descriptor replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 Note that the maximum length of this (target) descriptor is the length

 of the descriptor buffer in the allocated host heap cell; this may be greater

 than the maximum length specified when this descriptor was created or last

 re-allocated.

 @param aDes An 8-bit non-modifiable descriptor.

 @return A reference to this 8-bit heap descriptor.

 @panic USER 23  if the length of the descriptor aDes is greater than the

                 maximum length of this (target) descriptor

 */

 	{

 	Copy(aDes,(STD_CLASS::AllocLen(this)-sizeof(TDesC8))/sizeof(TUint8));

 	return(*this);

 	}

 EXPORT_C HBufC8 *HBufC8::ReAlloc(TInt aMaxLength)

 /**

 Expands or contracts the heap descriptor.

 This is done by:

 1. creating a new heap descriptor.

 2. copying the original data into the new descriptor.

 3. deleting the original descriptor.

 @param aMaxLength The new requested maximum length of the descriptor. 

                   Note that the resulting heap cell size and, therefore,

                   the resulting maximum length of the descriptor may be

                   larger than requested.

 @return A pointer to the new expanded or contracted 8 bit heap descriptor -  

         the original descriptor is deleted. NULL, if the new 8-bit heap descriptor 

         cannot be created - the original descriptor remains unchanged

 @panic USER 26  if aMaxLength is less than the length of the existing data.

 @panic USER 30  if aMaxLength is negative.

 */

 	{

 	__ASSERT_ALWAYS(aMaxLength>=0,Panic(ETDes8MaxLengthNegative));

 	__ASSERT_ALWAYS(Length()<=aMaxLength,Panic(ETDes8ReAllocTooSmall));

 	return((HBufC8 *)STD_CLASS::ReAlloc(this,(aMaxLength*sizeof(TUint8))+sizeof(TDesC8)));

 	}

 EXPORT_C HBufC8 *HBufC8::ReAllocL(TInt aMaxLength)

 /**

 Expands or contracts the descriptor; leaves on failure.

 This is done by:

 1. creating a new heap descriptor.

 2. copying the original data into the new descriptor.

 3. deleting the original descriptor.

 @param aMaxLength The new requested maximum length of the descriptor. 

                   Note that the resulting heap cell size and, therefore,

                   the resulting maximum length of the descriptor may be

                   larger than requested.

 @return A pointer to the new expanded or contracted 8 bit heap descriptor -  

         the original descriptor is deleted. NULL, if the new 8-bit heap descriptor 

         cannot be created - the original descriptor remains unchanged

 @panic USER 26  if aMaxLength is less than the length of the existing data.

 @panic USER 30  if aMaxLength is negative.

 */

 	{

 	__ASSERT_ALWAYS(aMaxLength>=0,Panic(ETDes8MaxLengthNegative));

 	__ASSERT_ALWAYS(Length()<=aMaxLength,Panic(ETDes8ReAllocTooSmall));

 	return((HBufC8 *)STD_CLASS::ReAllocL(this,(aMaxLength*sizeof(TUint8))+sizeof(TDesC8)));

 	}

 EXPORT_C TPtr8 HBufC8::Des()

 /**

 Creates and returns an 8-bit modifiable pointer descriptor for the data

 represented by this 8-bit heap descriptor.

 The content of a heap descriptor normally cannot be altered, other than by 

 complete replacement of the data. Creating a modifiable pointer descriptor 

 provides a way of changing the data.

 The modifiable pointer descriptor is set to point to this heap descriptor's 

 data.

 The length of the modifiable pointer descriptor is set to the length of this 

 heap descriptor.

 The maximum length of the modifiable pointer descriptor is set to the length 

 of the heap descriptor's buffer. Note that the maximum length is the length 

 of the descriptor buffer in the allocated host heap cell; this may be greater 

 than the maximum length requested when this descriptor was originally created 

 or last re-allocated.

 When data is modified through this new pointer descriptor, the lengths of 

 both it and this heap descriptor are changed.

 Note that it is a common mistake to use Des() to create a TDesC8& reference. 

 While not incorrect, it is simpler and much more efficient to simply dereference 

 the heap descriptor.

 @return An 8-bit modifiable pointer descriptor representing the data in this 

         8-bit heap descriptor.

 */

 	{

 	return DoDes((STD_CLASS::AllocLen(this)-sizeof(TDesC8))/sizeof(TUint8));

 	}

 #endif	// __KERNEL_MODE__

 #ifndef __DES8_MACHINE_CODED__

 EXPORT_C void TDes8::SetLength(TInt aLength)

 /**

 Sets the length of the data represented by the descriptor to the

 specified value.

 @param aLength The new length of the descriptor.

 @panic USER 23  if alength is negative or is greater than the maximum length of

                 this (target) descriptor.

 */

 	{

 	__ASSERT_ALWAYS(TUint(aLength)<=TUint(MaxLength()),Panic(ETDes8Overflow));

 	DoSetLength(aLength);

 	if (Type()==EBufCPtr)

 		((SBufCPtr8 *)this)->ptr->length=aLength; // Relies on iType==0 for an TBufC

   	}

 EXPORT_C void TDes8::SetMax()

 /**

 Sets the length of the data to the maximum length of the descriptor.

 */

 	{

 	SetLength(iMaxLength);

 	}

 EXPORT_C void TDes8::Copy(const TUint8 *aString)

 /**

 Copies data into this descriptor replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 @param aString A pointer to a zero-terminated string.

 @panic USER 23  if the length of aString, excluding the zero terminator, is

                 greater than the maximum length of this (target) descriptor.

 */

 	{

 	TInt len=STRING_LENGTH(aString);

 	SetLength(len);

     memmove(WPtr(), aString, len);

 	}

 EXPORT_C void TDes8::Copy(const TUint8 *aBuf,TInt aLength)

 /**

 Copies data into this descriptor replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 @param aBuf    The start address of data to be copied.

 @param aLength The length of data to be copied.

 @panic USER 23  if aLength is greater than the maximum length of

                 this (target) descriptor.

 */

 	{

 	SetLength(aLength);

     memmove(WPtr(), aBuf, aLength);

 	}

 EXPORT_C void TDes8::Copy(const TDesC8 &aDes)

 /**

 Copies data into this descriptor replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 @param aDes An 8-bit non-modifiable descriptor. The length of the data cannot 

             be greater than the maximum length of the target descriptor.

 @panic USER 23  if the length of aDes is greater than the maximum length of

                 this (target) descriptor.

 */

 	{

 	TInt len=aDes.Length();

 	SetLength(len);

     memmove(WPtr(), aDes.Ptr(), len);

 	}

 #endif

 #ifndef __KERNEL_MODE__

 EXPORT_C void TDes8::Copy(const TDesC16 &aDes)

 /**

 Copies data into this descriptor replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 @param aDes A 16-bit non-modifiable descriptor. Each double-byte value can 

             only be copied into the corresponding single byte when the

             double-byte value is less than decimal 256. A double-byte value of

             256 or greater cannot be  copied and the corresponding single byte

             is set to a value of decimal 1.

 @panic USER 23  if the length of the aDes is greater than the maximum length

                 of this (target) descriptor.

 */

 	{

 	TInt len=aDes.Length();

 	SetLength(len);

 	const TUint16 *pS=aDes.Ptr();

 	const TUint16 *pE=pS+len;

 	TUint8 *pT=WPtr();

 	while (pS<pE)

 		{

 		TUint c=(*pS++);

 		if (c>=0x100)

 			c=1;

 		*pT++=(TUint8)c;

 		}

 	}

 #endif

 #ifndef __DES8_MACHINE_CODED__

 EXPORT_C void TDes8::Append(TChar aChar)

 /**

 Appends a character onto the end of this descriptor's data.

 The length of this descriptor is incremented to reflect the new content.

 @param aChar The single character to be appended. The length of the descriptor 

              is incremented by one. The function assumes that the character

              is non-Unicode and that it can be represented by a single byte.

 @panic USER 23  if the resulting new length of this descriptor is greater than

                 its maximum length.

 */

 	{

 	TInt len=Length();

 	TUint8 *pB=WPtr()+len;

 	SetLength(len+1);

 	*pB++=(TUint8)aChar;

 	}

 EXPORT_C void TDes8::Append(const TUint8 *aBuf,TInt aLength)

 /**

 Appends data onto the end of this descriptor's data.

 The length of this descriptor is incremented to reflect the new content.

 @param aBuf    A pointer to the data to be copied.

 @param aLength The length of the data to be copied.

 @panic USER 23  if the resulting new length of this descriptor is greater than

                 its maximum length.

 @panic USER 29  if aLength is negative.

 */

 	{

 	__ASSERT_ALWAYS(aLength>=0,Panic(ETDes8LengthNegative));

 	TInt len=Length();

 	SetLength(len+aLength);

     memmove(WPtr()+len, aBuf, aLength);

 	}

 EXPORT_C void TDes8::Append(const TDesC8 &aDes)

 /**

 Appends data onto the end of this descriptor's data.

 The length of this descriptor is incremented to reflect the new content.

 @param aDes An 8-bit non-modifiable descriptor whose data is to be appended.

 @panic USER 23  if the resulting new length of this descriptor is greater than

                 its maximum length.

 */

 	{

 	TInt len=Length();

     TInt n=aDes.Length();

 	SetLength(len+n);

     memmove(WPtr()+len, aDes.Ptr(), n);

 	}

 #endif

 #ifndef __KERNEL_MODE__

 EXPORT_C void TDes8::Append(const TDesC16 &aDes)

 /**

 Appends data onto the end of this descriptor's data.

 The length of this descriptor is incremented to reflect the new content.

 @param aDes A 16-bit non-modifiable descriptor whose data is to be appended. 

             Each double-byte value can only be appended as a single byte when

             the double-byte value is less than decimal 256. A double-byte value

             of 256 or greater cannot be appended and the corresponding single

             byte is set to a value of decimal 1.

 @panic USER 23  if the resulting new length of this descriptor is greater than

                 its maximum length.

 */

 	{

 	TInt len=Length();

 	TInt n=aDes.Length();

 	const TUint16* pS=aDes.Ptr();

 	const TUint16* pE=pS+n;

 	TUint8 *pT=WPtr()+len;

 	SetLength(len+n);

 	while (pS<pE)

 		{

 		TUint c=(*pS++);

 		if (c>=0x100)

 			c=1;

 		*pT++=(TUint8)c;

 		}

 	}

 #endif

 #ifndef __KERNEL_MODE__

 EXPORT_C void TDes8::Swap(TDes8 &aDes)

 /**

 Swaps the data represented by this descriptor with the data represented by 

 the specified descriptor.

 The lengths of both descriptors are swapped to reflect the change.

 Note that each descriptor must be capable of accommodating the contents of

 the other descriptor.

 @param aDes The 8-bit modifiable descriptor whose data is to be swapped with 

             the data of this descriptor.

 @panic USER 23  if the maximum length of either descriptor is smaller than the 

                 length of the other descriptor.

 */

 	{

 	TInt l=Length();

 	TInt r=aDes.Length();

 	aDes.SetLength(l);

 	SetLength(r);

 	TInt s=Min(l,r);

 	l-=s;

 	r-=s;

 	TUint8 *pL=WPtr();

 	TUint8 *pR=aDes.WPtr();

 	while (s--)

 		{

 		TChar a=(*pL);

 		*pL++=(*pR);

 		*pR++=(TUint8)a;

 		}

 	while (l--)

 		*pR++=(*pL++);

 	while (r--)

 		*pL++=(*pR++);

 	}

 #endif

 #ifndef __DES8_MACHINE_CODED__

 EXPORT_C void TDes8::Fill(TChar aChar)

 /**

 Fills the descriptor's data area with the specified character, replacing any 

 existing data.

 The descriptor is filled from the beginning up to its current length. The 

 descriptor's length does not change. It is not filled to its maximum length.

 @param aChar The fill character. The function assumes that the character is 

              non-Unicode, and that it can be represented by a single byte.

 */

 	{

     memset(WPtr(), (TInt)(aChar.operator TUint()), Length());

 	}

 #endif

 EXPORT_C void TDes8::Fill(TChar aChar,TInt aLength)

 /**

 Fills the descriptor's data area with the specified character, replacing any 

 existing data.

 The descriptor is filled with the specified number of characters.

 and its length is changed to reflect this.

 @param aChar   The fill character. The function assumes that the character is 

                non-Unicode, and that it can be represented by a single byte. 

 @param aLength The new length of the descriptor and the number of fill

                characters to be copied into it.

 @panic USER 23  if aLength is negative or is greater than the maximum length

                 of this descriptor.

 */

 	{

 	SetLength(aLength);

     memset(WPtr(), (TInt)(aChar.operator TUint()), aLength);

 	}

 #ifndef __KERNEL_MODE__

 EXPORT_C void TDes8::AppendFill(TChar aChar,TInt aLength)

 /**

 Appends and fills this descriptor with the specified character.

 The descriptor is appended with the specified number of characters.

 and its length is changed to reflect this.

 @param aChar   The fill character. The function assumes that the character

                is non-Unicode and that it can be represented by a single byte.

 @param aLength The number of fill characters to be appended.

 @panic USER 23  if aLength is negative, or the resulting length of this

                 descriptor is greater than its maximum length.

 */

 	{

 	TInt len=Length();

 	SetLength(len+aLength);

     memset(WPtr()+len, (TInt)(aChar.operator TUint()), aLength);

 	}

 #endif

 #ifndef __DES8_MACHINE_CODED__

 #ifndef __KERNEL_MODE__

 EXPORT_C void TDes8::ZeroTerminate()

 /**

 Appends a zero terminator onto the end of this descriptor's data.

 The length of the descriptor is not changed. It must, however, be strictly

 less than the descriptor's maximum length. 

 This condition guarantees that there is sufficient space for the

 zero terminator.

 @panic USER 23  if the descriptor's length is not strictly less than its

                 maximum length.

 */

 	{

 	TInt len=Length();

 	__ASSERT_ALWAYS(len<MaxLength(),Panic(ETDes8Overflow));

 	WPtr()[len]=0;

 	}

 EXPORT_C const TUint8 *TDes8::PtrZ()

 /**

 Appends a zero terminator onto the end of this descriptor's data and returns 

 a pointer to the data.

 The length of the descriptor is not changed. It must, however, be strictly

 less than the descriptor's maximum length.

 This condition guarantees that there is sufficient space for the

 zero terminator.

 @return A pointer to the descriptor's zero terminated data.

 @panic USER 23  if the descriptor's length is not strictly less than its

                 maximum length.

 */

 	{

 	ZeroTerminate();

 	return(Ptr());

 	}

 #endif

 EXPORT_C void TDes8::Zero()

 /**

 Sets the length of the data to zero.

 */

 	{

 	SetLength(0);

 	}

 EXPORT_C void TDes8::FillZ()

 /**

 Fills the descriptor's data area with binary zeroes, i.e. 0x00, replacing any 

 existing data.

 The descriptor is filled from the beginning up to its current length. The 

 descriptor's length does not change. It is not filled to its maximum length.

 */

 	{

     memclr(WPtr(), Length());

 	}

 #endif

 EXPORT_C void TDes8::FillZ(TInt aLength)

 /**

 Fills the descriptor's data area with binary zeroes, i.e. 0x00, replacing any 

 existing data, and changes its length.

 The descriptor is filled with the specified number of binary zeroes.

 The descriptor's length is changed to reflect this.

 @param aLength The new length of the descriptor and the number of binary zeroes

                to be copied into it. 

 @panic USER 23  if aLength is negative, or is greater than the maximum length

                 of this descriptor.

 */

 	{

 	SetLength(aLength);

     memclr(WPtr(), aLength);

 	}

 #ifndef __KERNEL_MODE__

 EXPORT_C void TDes8::Fold()

 /**

 Performs folding on the content of this descriptor.

 Note that folding is locale-independent behaviour. It is also important to 

 note that there can be no guarantee that folding is in any way culturally 

 appropriate, and should not be used when dealing with strings in natural

 language.

 */

 	{

 	TUint8 *pB=WPtr();

 	TInt len=Length();

 	const TUint8* table=__FoldCollTab8;

 	while (len--)

 		{

 		*pB=table[*pB];

 		pB++;

 		}

 	}

 EXPORT_C void TDes8::Collate()

 /**

 Performs collation on the content of this descriptor.

 @deprecated

 */

 	{

 	TUint8 *pB=WPtr();

 	TInt len=Length();

 	while (len--)

 		{

 		TChar c=User::Collate(*pB);

 		*pB++=(TUint8)c;

 		}

 	}

 EXPORT_C void TDes8::LowerCase()

 /**

 Converts the content of this descriptor to lower case.

 Conversion is implemented as appropriate to the current locale.

 */

 	{

 	TUint8 *pB=WPtr();

 	TInt len=Length();

 	while (len--)

 		{

 		TCharLC c(*pB);

 		*pB++=(TUint8)c;

 		}

 	}

 EXPORT_C void TDes8::UpperCase()

 /**

 Converts the content of this descriptor to upper case.

 Conversion is implemented as appropriate to the current locale.

 */

 	{

 	TUint8 *pB=WPtr();

 	TInt len=Length();

 	while (len--)

 		{

 		TCharUC c(*pB);

 		*pB++=(TUint8)c;

 		}

 	}

 EXPORT_C void TDes8::Capitalize()

 /**

 Capitalises the content of this descriptor.

 Capitalisation is implemented as appropriate to the current locale.

 */

 	{

 	TUint8 *pB=WPtr();

 	TInt len=Length();

 	if (len--)

 		{

 		*pB=(TUint8)User::TitleCase(*pB);

 		++pB;

 		while (len--)

 			{

 			*pB=(TUint8)User::LowerCase(*pB);

 			++pB;

 			}

 		}

 	}

 EXPORT_C void TDes8::CopyF(const TDesC8 &aDes)

 /**

 Copies and folds data from the specified descriptor into this descriptor

 replacing any existing data.

 The length of this descriptor is set to reflect the new 

 data.

 Note that folding is locale-independent behaviour. It is also important to 

 note that there can be no guarantee that folding is in any way culturally 

 appropriate, and should not be used when dealing with strings in natural

 language.

 @param aDes An 8-bit non-modifiable descriptor.

 @panic USER 23  if the length of aDes is greater than the maximum length of

                 this target descriptor.

 */

 	{

 	TInt len=aDes.Length();

 	SetLength(len);

 	const TUint8 *pS=aDes.Ptr();

 	TUint8 *pT=WPtr();

 	const TUint8* table=__FoldCollTab8;

 	while (len--)

 		{

 		*pT++=table[*pS++];

 		}

 	}

 EXPORT_C void TDes8::CopyC(const TDesC8 &aDes)

 /**

 Copies and collates data from the specified descriptor 

 into this descriptor replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 @param aDes An 8 bit non-modifiable descriptor.

 @panic USER 23  if the length of aDes is greater than the maximum length of

                 this target descriptor.

 @deprecated

 */

 	{

 	TInt len=aDes.Length();

 	SetLength(len);

 	const TUint8 *pS=aDes.Ptr();

 	TUint8 *pT=WPtr();

 	while (len--)

 		{

 		TChar c=User::Collate(*pS++);

 		*pT++=(TUint8)c;

 		}

 	}

 EXPORT_C void TDes8::CopyLC(const TDesC8 &aDes)

 /**

 Copies text from the specified descriptor and converts it to lower case before 

 putting it into this descriptor, replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 Conversion to lower case is implemented as appropriate to the current locale.

 @param aDes An 8-bit non-modifiable descriptor.

 @panic USER 23  if the length of aDes is greater than the maximum length of

                 this target descriptor.

 */

 	{

 	TInt len=aDes.Length();

 	SetLength(len);

 	const TUint8 *pS=aDes.Ptr();

 	TUint8 *pT=WPtr();

 	while (len--)

 		{

 		TCharLC c(*pS++);

 		*pT++=(TUint8)c;

 		}

 	}

 EXPORT_C void TDes8::CopyUC(const TDesC8 &aDes)

 /**

 Copies text from the specified descriptor and converts it to upper case before 

 putting it into this descriptor, replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 Conversion to upper case is implemented as appropriate to the current locale.

 @param aDes An 8-bit non-modifiable descriptor.

 @panic USER 23  if the length of aDes is greater than the maximum length of

                 this target descriptor.

 */

 	{

 	TInt len=aDes.Length();

 	SetLength(len);

 	const TUint8 *pS=aDes.Ptr();

 	TUint8 *pT=WPtr();

 	while (len--)

 		{

 		TCharUC c(*pS++);

 		*pT++=(TUint8)c;

 		}

 	}

 EXPORT_C void TDes8::CopyCP(const TDesC8 &aDes)

 /**

 Copies text from the specified descriptor and capitalises it before putting 

 it into this descriptor, replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 Capitalisation is implemented as appropriate to the current locale.

 @param aDes An 8-bit non-modifiable descriptor.

 @panic USER 23  if the length of aDes is greater than the maximum length of

                 this target descriptor.

 */

 	{

 	TInt len=aDes.Length();

 	SetLength(len);

 	const TUint8 *pS=aDes.Ptr();

 	TUint8 *pT=WPtr();

 	if (len--)

 		{

 		TChar c(*pS++);

 #ifdef _UNICODE

 		c.TitleCase();

 #else

 		c.UpperCase();

 #endif

 		*pT++=(TUint8)c;

 		while (len--)

 			{

 			TCharLC c=(*pS++);

 			*pT++=(TUint8)c;

 			}

 		}

 	}

 EXPORT_C void TDes8::Repeat(const TUint8 *aBuf,TInt aLength)

 /**

 Copies data with repetition into this descriptor, from a memory location

 specified by pointer, replacing any existing data.

 Copying proceeds until this descriptor is filled up to its current length. 

 If it cannot contain a whole number of copies of the source data, then the 

 last copy is truncated.

 @param aBuf    A pointer to data to be repeatedly copied. 

 @param aLength The length of data to be copied.

 @panic USER 29  if aLength is negative.

 */

 	{

 	__ASSERT_ALWAYS(aLength>=0,Panic(ETDes8LengthNegative));

 	TUint8 *pB=WPtr();

 	TInt len=Length();

 	if (len && aLength)

 		{

 		while (len)

 			{

 			TInt i=Min(len,aLength);

 			pB=memCopy(pB,aBuf,i);

 			len-=i;

 			}

 		}

 	}

 EXPORT_C void TDes8::Repeat(const TDesC8 &aDes)

 /**

 Copies data with repetition into this descriptor, from another descriptor,

 replacing any existing data.

 Copying proceeds until this descriptor is filled up to its current length. 

 If it cannot contain a whole number of copies of the source data, then the 

 last copy is truncated.

 @param aDes An 8-bit non-modifiable descriptor whose data is to be repeatedly 

             copied.

 */

 	{

 	Repeat(aDes.Ptr(),aDes.Length());

 	}

 EXPORT_C void TDes8::Trim()

 /**

 Deletes leading and trailing whitespace characters from the descriptor's data.

 The length of the descriptor is reduced to reflect the loss of the whitespace characters.

 @see TDes8::TrimLeft()

 @see TDes8::TrimRight()

 */

 	{

 	TrimLeft();

 	TrimRight();

 	}

 EXPORT_C void TDes8::TrimAll()

 /**

 Deletes leading and trailing whitespace characters from the descriptor's data and 

 replaces each contiguous set of whitespace characters within the data by one whitespace 

 character.

 The length of the descriptor is reduced to reflect the loss of the whitespace 

 characters.

 @see TDes8::Trim()

 */

 	{

 	TrimLeft();

 	TrimRight();

 	TUint8 *pBuf=(TUint8 *)Ptr();

 	TUint8 *pSrc=pBuf;

 	TUint8 *pDst=pBuf;

 	TInt len=Length();

 	TInt spaces=0;

 	while (len--)

 		{

 		TChar c=*pSrc;

 		if (c.IsSpace())

 			{

 			if (spaces++==0)

 				{

 				if (pDst!=pSrc)

 					*pDst=*pSrc;

 				pDst++;

 				}

 			}

 		else

 			{

 			spaces=0;

 			if (pDst!=pSrc)

 				*pDst=*pSrc;

 			pDst++;

 			}

 		pSrc++;

 		}

 	Delete(pDst-pBuf, pSrc-pDst);

 	}

 EXPORT_C void TDes8::TrimLeft()

 /**

 Deletes leading whitespace characters from the descriptor's data.

 All whitespace characters up to, but not including the first non-whitespace

 character, are deleted.

 The length of the descriptor is reduced to reflect the loss of the

 whitespace characters.

 */

 	{

 	const TUint8 *pBuf=Ptr();

 	const TUint8 *pB=pBuf;

 	TInt len=Length();

 	while (len--)

 		{

 		TChar c=(*pB);

 		if (!c.IsSpace())

 			break;

 		pB++;

 		}

 	Delete(0,pB-pBuf);

 	}

 EXPORT_C void TDes8::TrimRight()

 /**

 Deletes trailing whitespace characters from the descriptor's data.

 The process starts on the right hand side of the descriptor's data

 and proceeds to the left. 

 All whitespace characters up to, but not including the first non-whitespace character, 

 are deleted.

 The length of the descriptor is reduced to reflect the loss of the whitespace

 characters.

 */

 	{

 	TInt len=Length();

 	if (len==0)

 		return;

 	const TUint8 *pB=Ptr()+len-1;

 	TInt s=len;

 	while (s)

 		{

 		TChar c=(*pB--);

 		if (!c.IsSpace())

 			break;

 		s--;

 		}

 	Delete(s,len-s);

 	}

 EXPORT_C void TDes8::Insert(TInt aPos,const TDesC8 &aDes)

 /**

 Inserts data into this descriptor.

 The length of this descriptor is changed to reflect the extra data.

 @param aPos The position within the data where insertion is to start. This 

             is an offset value; a zero value refers to the leftmost data

             position.

 @param aDes An 8 bit non modifiable descriptor whose data is to be inserted.

 @panic USER 22  if aPos is negative or is greater than the length of this

                 descriptor.

 @panic USER 23  if the resulting length of this descriptor is greater than its

                 maximum length.

 */

 	{

 	TInt len=Length();

 	__ASSERT_ALWAYS(aPos>=0 && aPos<=len,Panic(ETDes8PosOutOfRange));

 	TInt s=aDes.Length();

 	__ASSERT_ALWAYS((len+s)<=MaxLength(),Panic(ETDes8Overflow));

 	TUint8 *pB=WPtr();

 	memmove(pB+aPos+s,pB+aPos,len-aPos);

 	memmove(pB+aPos,aDes.Ptr(),aDes.Length());

 	SetLength(len+s);

 	}

 EXPORT_C void TDes8::Delete(TInt aPos,TInt aLength)

 /**

 Deletes data from this descriptor.

 The length of this descriptor is changed to reflect the loss of data.

 @param aPos    The position within the data where deletion is to start. This 

                is an offset value; a zero value refers to the leftmost data

                position.

 @param aLength The length of data to be deleted. If necessary, the function 

                adjusts this value to ensure that no data beyond the end of the

                descriptor data area is deleted.

 @panic USER 22  if aPos is negative or is greater than the length of this

                 descriptor.

 */

 	{

 	TInt len=Length();

 	__ASSERT_ALWAYS(aPos>=0 && aPos<=len,Panic(ETDes8PosOutOfRange));

 	TInt d=Min(len-aPos,aLength);

 	TUint8 *pB=WPtr();

 	memmove(pB+aPos,pB+aPos+d,len-aPos-d);

 	SetLength(len-d);

 	}

 EXPORT_C void TDes8::Replace(TInt aPos,TInt aLength,const TDesC8 &aDes)

 /**

 Replaces data in this descriptor.

 The specified length can be different to the length of the replacement data.

 The length of this descriptor changes to reflect the change of data.

 @param aPos    The position within the data where replacement is to start.

                This is an offset value; a zero value refers to the leftmost

                data position.

 @param aLength The length of data to be replaced.

 @param aDes    The source 8-bit non-modifiable descriptor whose data is to

                replace the target descriptor's data at aPos.

 @panic USER 20  if aLength is negative or the sum of aLength and aPos is

                 greater than the length of this descriptor.

 @panic USER 22  if aPos is negative or is greater than the length of this

                 descriptor.

 @panic USER 23  if the resulting length of this descriptor is greater than its

                 maximum length.

 @panic USER 28  if the length of the source descriptor aDes is negative or is

                 greater than the maximum length of this target descriptor,

 */

 	{

 	TInt len=Length();

 	__ASSERT_ALWAYS(aPos>=0 && aPos<=len,Panic(ETDes8PosOutOfRange));

 	__ASSERT_ALWAYS(aLength>=0 && aPos+aLength<=len,Panic(ETDes8LengthOutOfRange));

 	TInt s=aDes.Length();

 	TInt maxlen=MaxLength();

 	__ASSERT_ALWAYS(s>=0 && s<=maxlen,Panic(ETDes8RemoteLengthOutOfRange));

 	__ASSERT_ALWAYS((len+s-aLength)<=maxlen,Panic(ETDes8Overflow));

 	TUint8 *pB=WPtr();

 	memmove(pB+aPos+s,pB+aPos+aLength,len-aPos-aLength);

 	memmove(pB+aPos,aDes.Ptr(),s);

 	SetLength(len+s-aLength);

 	}

 EXPORT_C void TDes8::Justify(const TDesC8 &aDes,TInt aWidth,TAlign anAlignment,TChar aFill)

 /**

 Copies data into this descriptor and justifies it, replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 The target area is considered to be an area of specified width positioned at

 the beginning of this descriptor's data area. Source data is copied into, and

 aligned within this target area according to the specified alignment

 instruction.

 If the length of the target area is larger than the length of the source, then

 spare space within the target area is padded with the fill character.

 @param aDes        An 8-bit non-modifiable descriptor containing the source data.

                    The length of the data to be copied is the smaller of:

                    the length of the source descriptor, and 

                    the width of the target area (only if this is not the

                    explicit negative value KDefaultJustifyWidth).

 @param aWidth      The width of the target area. If this has the specific

                    negative value KDefaultJustifyWidth, then the width is

                    re-set to the length of the data source.

 @param anAlignment The alignment of the data within the target area

 @param aFill       The fill character used to pad the target area. 

 @panic USER 23  if the resulting length of this descriptor is greater than

                 its maximum length or aWidth has a negative value other 

                 than KDefaultJustifyWidth.

 */

 	{

     Zero();

     AppendJustify(aDes.Ptr(),aDes.Length(),aWidth,anAlignment,aFill);

     }

 EXPORT_C void TDes8::AppendJustify(const TDesC8 &aDes,TInt aWidth,TAlign anAlignment,TChar aFill)

 /**

 Appends data onto the end of this descriptor's data and justifies it.

 The source of the appended data is an existing descriptor.

 The target area is considered to be an area of specified width, immediately 

 following this descriptor's existing data. Source data is copied into, and 

 aligned within this target area according to the specified alignment instruction.

 If the length of the target area is larger than the length of the source, 

 then spare space within the target area is padded with the fill character.

 @param aDes        An 8-bit non-modifiable descriptor containing the source

                    data. The length of the data to be copied is the smaller of:

                    the length of the source descriptor, and

                    the width of the target area (only if this is not the

                    explicit negative value KDefaultJustifyWidth). 

 @param aWidth      The width of the target area. If this has the specific

                    negative value KDefaultJustifyWidth, then the width is

 	               re-set to the length of the data source.

 @param anAlignment The alignment of the data within the target area. 

 @param aFill       The fill character used to pad the target area.

 @panic USER 23  if the resulting length of this descriptor is greater than

                 its maximum length or aWidth has a negative value other 

                 than KDefaultJustifyWidth.

 */

 	{

     AppendJustify(aDes.Ptr(),aDes.Length(),aWidth,anAlignment,aFill);

     } 

 EXPORT_C void TDes8::AppendJustify(const TDesC8 &aDes,TInt aLength,TInt aWidth,TAlign anAlignment,TChar aFill)

 /**

 Appends data onto the end of this descriptor's data and justifies it.

 The source of the appended data is an existing descriptor.

 The target area is considered to be an area of specified width, immediately 

 following this descriptor's existing data. Source data is copied into, and 

 aligned within this target area according to the specified alignment instruction.

 If the length of the target area is larger than the length of the source, 

 then spare space within the target area is padded with the fill character.

 @param aDes        An 8-bit non-modifiable descriptor containing the source data. 

 @param aLength     The length of data to be copied from the source descriptor. 

                    If this is greater than the width of the target area, then

                    the length of data copied is limited to the width.

                    The length of data to be copied must not be 	greater than

                    the length of the source descriptor. Note that this

                    condition is not automatically tested. 

 @param aWidth      The width of the target area. If this has the specific negative 

                    value KDefaultJustifyWidth, then the width is

                    re-set to the length of the data source.

 @param anAlignment The alignment of the data within the target area. 

 @param aFill       The fill character used to pad the target area.

 @panic USER 23  if the resulting length of this descriptor is greater than

                 its maximum length or aWidth has a negative value other 

                 than KDefaultJustifyWidth.

 */

 	{

     AppendJustify(aDes.Ptr(),aLength,aWidth,anAlignment,aFill);

     } 

 EXPORT_C void TDes8::AppendJustify(const TUint8 *aString,TInt aWidth,TAlign anAlignment,TChar aFill)

 /**

 Appends a zero terminated string onto the end of this descriptor's data and 

 justifies it.

 The zero terminator is not copied.

 The target area is considered to be an area of specified width, immediately 

 following this descriptor's existing data. Source data is copied into, and 

 aligned within, this target area according to the specified alignment instruction.

 If the length of the target area is larger than the length of the source, 

 then spare space within the target area is padded with the fill character.

 @param aString     A pointer to a zero terminated string. The length of the

                    data to be copied is the smaller of:

                    the length of the string (excluding the zero terminator),

                    and the width of the target area (only if this is not the

                    explicit negative value KDefaultJustifyWidth). 

 @param aWidth      The width of the target area. If this has the specific

                    negative value KDefaultJustifyWidth, then the width

                    is re-set to the length of the  zero terminated string

                    (excluding the zero terminator).

 @param anAlignment The alignment of the data within the target area. 

 @param aFill       The fill character used to pad the target area.

 @panic USER 23  if the resulting length of this descriptor is greater than

                 its maximum length or aWidth has a negative value other 

                 than KDefaultJustifyWidth.

 */

 	{

     AppendJustify(aString,STRING_LENGTH(aString),aWidth,anAlignment,aFill);

     } 

 EXPORT_C void TDes8::AppendJustify(const TUint8 *aString,TInt aLength,TInt aWidth,TAlign anAlignment,TChar aFill)

 /**

 Appends data onto the end of this descriptor's data and justifies it.

 The source of the appended data is a memory location.

 The target area is considered to be an area of specified width, immediately 

 following this descriptor's existing data. Source data is copied into, and 

 aligned within, this target area according to the specified alignment instruction.

 If the length of the target area is larger than the length of the source, 

 then spare space within the target area is padded with the fill character.

 @param aString     A pointer to a source memory location. 

 @param aLength     The length of data to be copied. If this is greater than the 

                    width of the target area, then the length of data copied is

                    limited to the width.

 @param aWidth      The width of the target area. If this has the specific

                    negative value KDefaultJustifyWidth, then the width is

                    re-set to the length of the data source.

 @param anAlignment The alignment of the data within the target area. 

 @param aFill       The fill character used to pad the target area.

 @panic USER 23  if the resulting length of this descriptor is greater than

                 its maximum length or aWidth has a negative value other 

                 than KDefaultJustifyWidth.

 @panic USER 29  if aLength is negative.               

 */

 	{

 	__ASSERT_ALWAYS(aLength>=0,Panic(ETDes8LengthNegative));

 	if (aWidth==KDefaultJustifyWidth)

 		aWidth=aLength;

 	if (aLength>aWidth)

 		aLength=aWidth;

 	TInt offset=Length();

 	AppendFill(aFill,aWidth);

 	TInt r=aWidth-aLength;

 	if (anAlignment==ECenter)

 		r>>=1;

 	else if (anAlignment==ELeft)

 		r=0;

 	memmove(WPtr()+offset+r,aString,aLength);

 	}

 #endif	// __KERNEL_MODE__

 EXPORT_C void TDes8::Num(TInt64 aVal)

 //

 // Convert a TInt64 to the descriptor.

 //

 /**

 Converts the 64-bit signed integer into a decimal character representation

 and copies the conversion into this descriptor, replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 If the integer is negative, the character representation is prefixed by a 

 minus sign.

 @param aVal The 64-bit signed integer value.

 */

 	{

 	Zero();

 	AppendNum(aVal);

 	}

 EXPORT_C void TDes8::Num(TUint64 aVal, TRadix aRadix)

 /**

 Converts the specified 64-bit unsigned integer into a character representation 

 based on the specified number system and copies the conversion into this descriptor, 

 replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 When a hexadecimal conversion is specified, hexadecimal characters are in 

 lower case.

 @param aVal   The 64-bit integer value. This is treated as an unsigned value. 

 @param aRadix The number system representation for the 64-bit integer.

 */

 	{

 	Zero();

 	AppendNum(aVal, aRadix);

 	}

 EXPORT_C void TDes8::NumFixedWidth(TUint aVal,TRadix aRadix,TInt aWidth)

 /**

 Converts the specified unsigned integer into a fixed width character

 representation based on the specified number system and copies the conversion

 into this descriptor, replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 The function generates the exact number of specified characters, either padding 

 to the left with character zeroes or discarding low order characters as necessary.

 When a hexadecimal conversion is specified, hexadecimal characters are in 

 lower case.

 This function is equivalent to using Format() with parameters which specify:

 1. a fixed length target field

 2. padding with zero characters, for example "%08x".

 When this is the case, always use NumFixedWidth() in preference 

 to Format() as it is more efficient.

 @param aVal   The unsigned integer value. 

 @param aRadix The number system representation for the unsigned integer. 

 @param aWidth The number of characters: to be used to contain the conversion, 

               to be copied into this descriptor.

 @see TDes8::Format()

 */

 	{

 	Zero();

 	AppendNumFixedWidth(aVal,aRadix,aWidth);

 	}

 #ifndef __KERNEL_MODE__

 EXPORT_C void TDes8::NumFixedWidthUC(TUint aVal,TRadix aRadix,TInt aWidth)

 /**

 Converts the specified unsigned integer into a fixed width character

 representation based on the specified number system and copies the conversion

 into this descriptor, replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 The function generates the exact number of specified characters, either padding 

 to the left with character zeroes or discarding low order characters as

 necessary.

 When a hexadecimal conversion is specified, hexadecimal characters are in 

 upper case.

 This function is equivalent to using Format() with parameters which specify:

 1. a fixed length target field

 2. padding with zero characters, for example "%08x".

 When this is the case, always use NumFixedWidthUC() in 

 preference to Format() as it is more efficient.

 @param aVal   The unsigned integer value. 

 @param aRadix The number system representation for the unsigned integer. 

 @param aWidth The number of characters to be used to contain the conversion,

               and to be copied into this descriptor.

 @see TDes8::Format()

 */

 	{

     Zero();

     AppendNumFixedWidthUC(aVal,aRadix,aWidth);

     }

 EXPORT_C void TDes8::NumUC(TUint64 aVal, TRadix aRadix)	//NOT __KERNEL_MODE__

 /**

 Converts the specified 64-bit unsigned integer into a character representation 

 based on the specified number system and copies the conversion into this descriptor, 

 replacing any existing data.

 The length of this descriptor is set to reflect the new data.

 When a hexadecimal conversion is specified, hexadecimal characters are in 

 upper case.

 @param aVal   The 64-bit integer value. This is treated as an unsigned value. 

 @param aRadix The number system representation for the 64-bit integer. If no 

               explicit value is specified, then EDecimal is the default.

 */

 	{

 	Zero();

 	AppendNumUC(aVal,aRadix);

 	}

 #endif	// __KERNEL_MODE__

 EXPORT_C void TDes8::AppendNum(TInt64 aVal)

 /**

 Converts the 64-bit signed integer into a decimal character representation 

 and appends the conversion onto the end of this descriptor's data.

 The length of this descriptor is incremented to reflect the new content.

 If the integer is negative, the character representation is prefixed by a 

 minus sign.

 @param aVal The 64-bit signed integer value.

 */

 	{

 	if (aVal < 0)

 		{

 		Append('-');

 		aVal = -aVal;

 		}

 	AppendNum(aVal, EDecimal);

 	}

 #ifndef __DES_MACHINE_CODED__

 GLDEF_C TInt __DoConvertNum(TUint aVal, TRadix aRadix, TUint aA, TUint8*& aDest)

 	{

 	__KERNEL_CHECK_RADIX(aRadix);

 	TUint radix = (TUint)aRadix;

 	TUint8* p = aDest;

 	TBool out16 = (aA>255);

 	aA &= 0xff;

 	do	{

 		TUint q = aVal/radix;

 		TUint c = aVal-q*radix;

 		(c>9) ? c+=(aA-10) : c+='0';

 		aVal = q;

 		if (out16)

 			*--p = 0;

 		*--p = (TUint8)c;

 		} while (aVal);

 	TInt l = aDest - p;

 	aDest = p;

 	return l;

 	}

 GLDEF_C TInt __DoConvertNum(TUint64 aVal, TRadix aRadix, TUint aA, TUint8*& aDest)

 	{

 	__KERNEL_CHECK_RADIX(aRadix);

 	TUint radix = (TUint)aRadix;

 	TUint8* p = aDest;

 	TBool out16 = (aA>255);

 	TUint8 a = static_cast<TUint8>(aA);

 	while (aVal >= UI64LIT(0x100000000))

 		{

 		TUint8 c = static_cast<TUint8>(aVal % radix);

 		aVal /= radix;

 		(c > 9) ? c = static_cast<TUint8>(c + a - 10) : c = static_cast<TUint8>(c + '0');

 		if (out16)

 			*--p = 0;

 		*--p = c;

 		}

 	TInt l = aDest - p;

 	aDest = p;

 	return l + __DoConvertNum((TUint)aVal, aRadix, aA, aDest);

 	}

 #endif

 void TDes8::DoPadAppendNum(TInt l, TInt aW, const TUint8* p)

 	{

 	if (aW<=0)

 		{

 		Append(p, l);

 		return;

 		}

 	TInt l0 = Length();

 	SetLength(l0 + aW);

 	TUint8* d = WPtr() + l0;

 	for (; aW>l; --aW) *d++ = (TUint8)'0';

 	memcpy(d, p, aW);

 	}

 void TDes8::DoAppendNum(TUint64 aVal, TRadix aRadix, TUint aA, TInt aW)

 //

 // Convert a TUint64 into the descriptor.

 //

 	{

 	TUint8 buf[APPEND_BUF_SIZE_64];

 	TUint8* p = buf + APPEND_BUF_SIZE_64;

 	TInt l = __DoConvertNum(aVal, aRadix, aA, p);

 	// coverity[overrun-local]

 	DoPadAppendNum(l, aW, p);

 	}

 EXPORT_C void TDes8::AppendNum(TUint64 aVal, TRadix aRadix)

 /**

 Converts the specified 64-bit unsigned integer into a character representation 

 based on the specified number system and appends the conversion onto the end 

 of this descriptor's data. The length of this descriptor is incremented to 

 reflect the new content

 When a hexadecimal conversion is specified, hexadecimal characters are in 

 lower case.

 @param aVal   The 64-bit integer value. This is treated as an unsigned value. 

 @param aRadix The number system representation for the 64-bit integer.

 */

 	{

 	DoAppendNum(aVal, aRadix, 'a', 0);

 	}

 EXPORT_C void TDes8::AppendNumFixedWidth(TUint aVal,TRadix aRadix,TInt aWidth)

 /**

 Converts the specified unsigned integer into a fixed width character

 representation based on the specified number system and appends the conversion

 onto the end of this descriptor's data.

 The length of this descriptor is incremented to reflect the new content.

 The function generates the exact number of specified characters, either padding 

 to the left with character zeroes or discarding low order characters as

 necessary.

 When a hexadecimal conversion is specified, hexadecimal characters are in 

 lower case.

 @param aVal   The unsigned integer value. 

 @param aRadix The number system representation for the unsigned integer. 

 @param aWidth The number of characters to be used to contain the conversion,

               and to be appended to this descriptor.

 */

 	{

 	DoAppendNum(aVal, aRadix, 'a', aWidth);

 	}

 #if (!defined(__DES8_MACHINE_CODED__) && !defined(__KERNEL_MODE__))

 EXPORT_C TPtr8 TDes8::LeftTPtr(TInt aLength) const

 /**

 Extracts the leftmost part of the data. 

 The function does not cut or remove any data but constructs a modifiable 

 pointer descriptor to represent the leftmost part of the data.

 @param aLength The length of the data to be extracted. If this value

                is greater than the length of the descriptor, the function

                extracts the whole of the descriptor.

 @return The 8-bit modifiable pointer descriptor representing the leftmost