sl@0: // Copyright (c) 1994-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of the License "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // e32\euser\us_lex16.cpp
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include "us_std.h"
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TLex16::TLex16()
sl@0: 	: iNext(NULL),iBuf(NULL),iEnd(NULL),iMark(NULL)
sl@0: /** 
sl@0: Default cosntructor.
sl@0: 
sl@0: Constructs a TLex16, initialising its members to NULL.
sl@0: */
sl@0: 	{}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C void TLex16::Assign(const TUint16 *aString)
sl@0: /**
sl@0: Assigns a string to this object from another string.
sl@0: 
sl@0: @param aString A pointer to a string to be assigned.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	iMark.iPtr=iNext=iBuf=aString;
sl@0: 	iEnd=iBuf+User::StringLength(aString);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C void TLex16::Assign(const TDesC16 &aDes)
sl@0: /**
sl@0: Assigns a string to this object from a descriptor.
sl@0: 
sl@0: @param aDes The descriptor to be assigned.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	iMark.iPtr=iNext=iBuf=aDes.Ptr();
sl@0: 	iEnd=iBuf+aDes.Length();
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C void TLex16::UnGet()
sl@0: /**
sl@0: Decrements the next character position, allowing the previously "got" character 
sl@0: to be re-read.
sl@0: 
sl@0: @panic USER 64, if the previous character is before the start of the string.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	__ASSERT_ALWAYS(iNext>iBuf,Panic(ETLex16UnGetUnderflow));
sl@0: 	iNext--;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C void TLex16::UnGetToMark(const TLexMark16 aMark)
sl@0: /**
sl@0: Sets the next character position to the supplied extraction mark position.
sl@0: 
sl@0: @param aMark Mark to copy to the next character position.
sl@0: 
sl@0: @panic USER 68, if the extraction mark is before the start or beyond the end
sl@0:        of the string.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	ValidateMark(aMark);
sl@0: 	iNext=aMark.iPtr;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C void TLex16::Inc(TInt aNumber)
sl@0: /**
sl@0: Increments the next character position by aNumber.
sl@0: 
sl@0: @param aNumber The number of characters to increment the next character
sl@0:                position by.
sl@0: 
sl@0: @panic USER 65, if the increment puts the next character position before the
sl@0:                 start or beyond the end of the string.               
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	iNext+=aNumber;
sl@0: 	__ASSERT_ALWAYS(iNext>=iBuf && iNext<=iEnd,Panic(ETLex16IncOutOfRange));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C void TLex16::Inc()
sl@0: /**
sl@0: Increments to the next character position.
sl@0: 
sl@0: @panic USER 65, if the increment puts the next character position before the
sl@0:                 start or beyond the end of the string.               
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	if (!Eos())
sl@0: 		iNext++;
sl@0: 	__ASSERT_ALWAYS(iNext<=iEnd,Panic(ETLex16IncOutOfRange));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TChar TLex16::Get()
sl@0: /**
sl@0: Gets the next character in the string and increments the next
sl@0: character position.
sl@0: 
sl@0: @return Next character to be read. 0 if at the end of the string.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	if (Eos())
sl@0: 		return(0);
sl@0: 	return(*iNext++);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TChar TLex16::Peek() const
sl@0: /**
sl@0: Shows the next character to be returned by Get().
sl@0: 
sl@0: @return Character to be returned by the next call to Get(). 0 if at the end of the 
sl@0:         string.
sl@0:         
sl@0: @see TLex16::Get        
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	if (Eos())
sl@0: 		return(0);
sl@0: 	return(*iNext);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C void TLex16::SkipSpace()
sl@0: /**
sl@0: Moves the next character position past any white space (space or separator). 
sl@0: 
sl@0: Stops if at the end of string.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	while (!Eos() && Peek().IsSpace())
sl@0: 		iNext++;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C void TLex16::SkipAndMark(TInt aNumber,TLexMark16& aMark)
sl@0: /**
sl@0: Moves the next character position a specified number of characters and copies 
sl@0: it to the specified extraction mark.
sl@0: 
sl@0: @param aNumber Number of characters to skip.
sl@0: @param aMark   On return, set to the next character position.
sl@0: 
sl@0: @panic USER 66, if the skip moves the next character position either to before
sl@0:        the start or beyond the end of the string.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	iNext+=aNumber;
sl@0: 	__ASSERT_ALWAYS(iNext>=iBuf && iNext<=iEnd,Panic(ETLex16SkipOutOfRange));
sl@0: 	Mark(aMark);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C void TLex16::SkipSpaceAndMark(TLexMark16& aMark)
sl@0: /**
sl@0: Moves the next character position past any white space and copies it to the 
sl@0: specified extraction mark.
sl@0: 
sl@0: Stops if at the end of the string.
sl@0: 
sl@0: @param aMark On return, contains a reference to the next character position.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	SkipSpace();
sl@0: 	Mark(aMark);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C void TLex16::SkipCharacters()
sl@0: /**
sl@0: Moves the next character position to the next white space (space or separator). 
sl@0: 
sl@0: Stops if at the end of the string.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	while (!Eos() && !Peek().IsSpace())
sl@0: 		iNext++;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::TokenLength(const TLexMark16 aMark) const
sl@0: /**
sl@0: Gets the length of the token starting at the specified extraction mark.
sl@0: 
sl@0: @param aMark Extraction mark indicating the start of the token.
sl@0: 
sl@0: @return Length of the token.
sl@0: 
sl@0: @panic USER 68, if the specified mark is before the start or beyond the end
sl@0:        of the string.       
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	ValidateMark(aMark);
sl@0: 	return (iNext-aMark.iPtr);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TPtrC16 TLex16::MarkedToken(const TLexMark16 aMark) const
sl@0: /**
sl@0: Extracts the token, starting at the specified mark
sl@0: 
sl@0: @param aMark Extraction mark indicating the start of the token.
sl@0: 
sl@0: @return Extracted token.
sl@0: 
sl@0: @panic USER 68, if the specified mark is before the start or beyond the end
sl@0:        of the string.       
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	return(TPtrC16(aMark.iPtr,TokenLength(aMark)));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TPtrC16 TLex16::MarkedToken() const
sl@0: //
sl@0: // Extract the internally marked token
sl@0: // there is the assumption here that iMark is always valid
sl@0: /**
sl@0: Extracts the marked token.
sl@0: 
sl@0: Note that the function assumes that the current extraction mark is valid.
sl@0: 
sl@0: @return Extracted token. 
sl@0: 
sl@0: @panic USER 68, if the specified mark is before the start or beyond the end
sl@0:        of the string.       
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	return(TPtrC16(iMark.iPtr,TokenLength()));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TPtrC16 TLex16::NextToken()
sl@0: /**
sl@0: Strips any white space and extracts the next token.
sl@0: 
sl@0: @return Extracted token.
sl@0: */
sl@0: 	{
sl@0: 	TLexMark16 mark;
sl@0: 
sl@0: 	SkipSpaceAndMark(mark);
sl@0: 	SkipCharacters();
sl@0: 	return(TPtrC16(mark.iPtr,iNext-mark.iPtr));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TPtrC16 TLex16::Remainder() const
sl@0: /**
sl@0: Gets a descriptor containing all the text from the next character position 
sl@0: to the end of the string.
sl@0: 
sl@0: @return Text from the next character position onwards.
sl@0: 
sl@0: @panic USER 17, if the value of (next character position - extraction mark) is
sl@0:        negative.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	return(TPtrC16(iNext,iEnd-iNext));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TPtrC16 TLex16::RemainderFromMark(const TLexMark16 aMark) const
sl@0: /**
sl@0: Gets a descriptor containing all the text from the specified extraction mark 
sl@0: to the end of the string.
sl@0: 
sl@0: @param aMark Extraction mark indicating where remaining text starts.
sl@0: 
sl@0: @return Text from the specified extraction mark onwards.
sl@0: 
sl@0: @panic USER 17, if the value of (next character position - extraction mark) is
sl@0:        negative.
sl@0: @panic USER 68, if the specified mark is before the start or beyond the end
sl@0:        of the string.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	ValidateMark(aMark);
sl@0: 	return(TPtrC16(aMark.iPtr,iEnd-aMark.iPtr));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TPtrC16 TLex16::RemainderFromMark() const
sl@0: //
sl@0: // Return the remainder from iMark
sl@0: // There is an assumption here that the internal mark will always be valid
sl@0: //
sl@0: /**
sl@0: Gets a descriptor containing all the text from the extraction mark to the end 
sl@0: of the string.
sl@0: 
sl@0: The function assumes that the current extraction mark is valid.
sl@0: 
sl@0: @return Text from the extraction mark onwards.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	return(TPtrC16(iMark.iPtr,iEnd-iMark.iPtr));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::Offset() const
sl@0: //
sl@0: // Return the offset from iNext to the lex start.
sl@0: //
sl@0: /**
sl@0: Gets the offset of the next character position from the start of the string.
sl@0: 
sl@0: @return Offset of next character position.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	return((TUint)(iNext-iBuf));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::MarkedOffset(const TLexMark16 aMark) const
sl@0: /**
sl@0: Gets the offset of the specified extraction mark from the start of the string.
sl@0: 
sl@0: @param aMark Extraction mark.
sl@0: 
sl@0: @return The offset of the extraction mark.
sl@0: 
sl@0: @panic USER 68, if the specified mark is before the start or beyond the end
sl@0:        of the string.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	ValidateMark(aMark);
sl@0: 	return((TUint)(aMark.iPtr-iBuf));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::BoundedVal(TUint32 &aVal,TRadix aRadix,TUint aLimit)
sl@0: /**
sl@0: Parses the string to extract a 32-bit unsigned integer, using the
sl@0: specified radix, and checks that it is within the specified limit.
sl@0: 
sl@0: The specified radix is one of binary, octal, decimal, or hexadecimal.
sl@0: 
sl@0: @param aVal   On return, contains the extracted integer.
sl@0: @param aRadix The radix to use when converting the number.
sl@0: @param aLimit The upper limit.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	TUint l=aLimit/aRadix;
sl@0: 	TUint v=0;
sl@0: 	TUint d=0;
sl@0: 	TLexMark16 mark(iNext);
sl@0: 	while (!Eos())
sl@0: 		{
sl@0: 		TChar c=Peek();
sl@0: 		if (!c.IsHexDigit())
sl@0: 			break;
sl@0: 		c=Get();
sl@0: 		if (c.IsAlpha())
sl@0: 			{
sl@0: 			c.UpperCase();
sl@0: 			c-=('A'-10);
sl@0: 			}
sl@0: 		else
sl@0: 			c-='0';
sl@0: 		if (c>=(TUint)aRadix)
sl@0: 			{
sl@0: 			iNext--;
sl@0: 			break;
sl@0: 			}
sl@0: 		if (v>l)
sl@0: 			{
sl@0: 			UnGetToMark(mark);
sl@0: 			return(KErrOverflow);
sl@0: 			}
sl@0: 		TUint o=v;
sl@0: 		v*=aRadix;
sl@0: 		v+=c;
sl@0: 		if (o>v)
sl@0: 			{
sl@0: 			UnGetToMark(mark);
sl@0: 			return(KErrOverflow);
sl@0: 			}
sl@0: 		d++;
sl@0: 		}
sl@0: 	if (d==0)
sl@0: 		{
sl@0: 		UnGetToMark(mark);
sl@0: 		return(KErrGeneral);
sl@0: 		}
sl@0: 	if (v>aLimit)
sl@0: 		{
sl@0: 		UnGetToMark(mark);
sl@0: 		return(KErrOverflow);
sl@0: 		}
sl@0: 	aVal=v;
sl@0: 	return(KErrNone);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::BoundedVal(TInt32 &aVal,TInt aLimit)
sl@0: /**
sl@0: Parses the string to extract a 32-bit signed integer, and checks that it is
sl@0: within the specified limit.
sl@0: 
sl@0: @param aVal   On return, contains the extracted integer.
sl@0: @param aLimit The upper limit.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	if (Eos())
sl@0: 		return(KErrGeneral);
sl@0: 	TUint lim=aLimit;
sl@0: 	TLexMark16 mark(iNext);
sl@0: 	TUint s=FALSE;
sl@0: 	TChar c=Peek();
sl@0: 	if (c=='-')
sl@0: 		{
sl@0: 		lim++;
sl@0: 		s++;
sl@0: 		Inc();
sl@0: 		}
sl@0: 	else if (c=='+')
sl@0: 		Inc();
sl@0: 	TUint32 v;
sl@0: 	TInt r=BoundedVal(v,EDecimal,lim);
sl@0: 	if (r==KErrNone)
sl@0: 		{
sl@0: 		if (v>lim)
sl@0: 			r=KErrOverflow;
sl@0: 		else if (s)
sl@0: 			aVal=(-((TInt32)v));
sl@0: 		else
sl@0: 			aVal=v;
sl@0: 		}
sl@0: 	if (r!=KErrNone)
sl@0: 		UnGetToMark(mark);
sl@0: 	return(r);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::BoundedVal(TInt64& aVal, TRadix aRadix, const TInt64& aLimit)
sl@0: /**
sl@0: Parses the string to extract a 64-bit signed integer, using the
sl@0: specified radix, and checks that it is within the specified limit.
sl@0: 
sl@0: The specified radix is one of binary, octal, decimal, or hexadecimal.
sl@0: 
sl@0: @param aVal   On return, contains the extracted integer.
sl@0: @param aRadix The radix to use when converting the number.
sl@0: @param aLimit The upper limit.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 	TUint64 rad = aRadix;
sl@0: 	TUint64 lim = static_cast<TUint64>(aLimit);
sl@0: 
sl@0: 	lim /= rad;
sl@0: 
sl@0: 	TUint64 v = 0;
sl@0: 	TUint digit=0;
sl@0: 	TLexMark16 mark(iNext);
sl@0: 	while (!Eos())
sl@0: 		{
sl@0: 		TChar c=Peek(); 
sl@0: 		if (!c.IsHexDigit())
sl@0: 			break;	  
sl@0: 		c=Get(); 
sl@0: 		if (c.IsAlpha())
sl@0: 			{
sl@0: 			c.UpperCase();
sl@0: 			c-=('A'-10);
sl@0: 			}
sl@0: 		else
sl@0: 			c-='0';
sl@0: 		if (c >= rad)
sl@0: 			{
sl@0: 			iNext--;
sl@0: 			break;
sl@0: 			}
sl@0: 		if (v > lim)
sl@0: 			{
sl@0: 			UnGetToMark(mark);
sl@0: 			return(KErrOverflow);
sl@0: 			}
sl@0: 		TUint64 old = v;
sl@0: 		v*=rad;
sl@0: 		v+=c;
sl@0: 		if (old > v)
sl@0: 			{
sl@0: 			UnGetToMark(mark);
sl@0: 			return(KErrOverflow);
sl@0: 			}
sl@0: 		digit++;
sl@0: 		}
sl@0: 	if (digit==0)
sl@0: 		{
sl@0: 		UnGetToMark(mark);
sl@0: 		return(KErrGeneral);
sl@0: 		}
sl@0: 	if (v > static_cast<TUint64>(aLimit))
sl@0: 		{
sl@0: 		UnGetToMark(mark);
sl@0: 		return(KErrOverflow);
sl@0: 		}
sl@0: 	aVal = static_cast<TInt64>(v);
sl@0: 	return(KErrNone);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::BoundedVal(TInt64& aVal, const TInt64& aLimit)
sl@0: /**
sl@0: Parses the string to extract a 64-bit signed integer, and checks that it
sl@0: is within the specified limit.
sl@0: 
sl@0: @param aVal   On return, contains the extracted integer.
sl@0: @param aLimit The upper limit.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	if (Eos())
sl@0: 		return(KErrGeneral);
sl@0: 	TInt64 lim = aLimit;
sl@0: 	TLexMark16 mark(iNext);
sl@0: 	TBool s=EFalse;
sl@0: 	TChar c=Peek();
sl@0: 	if (c=='-')
sl@0: 		{
sl@0: 		lim++;
sl@0: 		s++;
sl@0: 		Inc();
sl@0: 		}
sl@0: 	else if (c=='+')
sl@0: 		Inc();
sl@0: 	TInt64 v;
sl@0: 	TInt r=BoundedVal(v,EDecimal,lim);
sl@0: 	if (r==KErrNone)
sl@0: 		{
sl@0: 		if (v>lim)
sl@0: 			r=KErrOverflow;
sl@0: 		else if (s)
sl@0: 			aVal=(-v);
sl@0: 		else
sl@0: 			aVal=v;
sl@0: 		}
sl@0: 	if (r!=KErrNone)
sl@0: 		UnGetToMark(mark);
sl@0: 	return(r);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::Val(TInt8 &aVal)
sl@0: /**
sl@0: Parses the string to extract a signed 8-bit integer.
sl@0: 
sl@0: @param aVal On return, contains the extracted integer.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	TInt32 v;
sl@0: 	TInt r=BoundedVal(v,0x7fu);
sl@0: 	if (r==KErrNone)
sl@0: 		aVal=(TInt8)v;
sl@0: 	return(r);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::Val(TInt16 &aVal)
sl@0: /**
sl@0: Parses the string to extract a signed 16-bit integer.
sl@0: 
sl@0: @param aVal On return, contains the extracted integer.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	TInt32 v;
sl@0: 	TInt r=BoundedVal(v,0x7fffu);
sl@0: 	if (r==KErrNone)
sl@0: 		aVal=(TInt16)v;
sl@0: 	return(r);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::Val(TInt32 &aVal)
sl@0: /**
sl@0: Parses the string to extract a signed 32-bit integer.
sl@0: 
sl@0: @param aVal On return, contains the extracted integer.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	TInt32 v;
sl@0: 	TInt r=BoundedVal(v,0x7fffffffu);
sl@0: 	if (r==KErrNone)
sl@0: 		aVal=v;
sl@0: 	return(r);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::Val(TInt64& aVal)
sl@0: /**
sl@0: Parses the string to extract a signed 64-bit integer.
sl@0: 
sl@0: @param aVal On return, contains the extracted integer.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	TChar c=Peek();
sl@0: 	if (c=='-' || c=='+')
sl@0: 		Inc();
sl@0: 	TInt r;
sl@0: 	if (c=='-')
sl@0: 		{
sl@0: 		r=BoundedVal(aVal, EDecimal, UI64LIT(0x8000000000000000));
sl@0: 		if (r==KErrNone)
sl@0: 			aVal=-aVal;
sl@0: 		}
sl@0: 	else
sl@0: 		r=BoundedVal(aVal, UI64LIT(0x7fffffffffffffff));
sl@0: 	return(r);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::Val(TUint8 &aVal,TRadix aRadix)
sl@0: /**
sl@0: Parses the string to extract an 8-bit unsigned integer, using the
sl@0: specified radix.
sl@0: 
sl@0: The specified radix is one of binary, octal, decimal, or hexadecimal.
sl@0: 
sl@0: @param aVal   On return, contains the extracted integer.
sl@0: @param aRadix The radix to use when converting the number.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	TUint32 v;
sl@0: 	TInt r=BoundedVal(v,aRadix,0xffu);
sl@0: 	if (r==KErrNone)
sl@0: 		aVal=(TUint8)v;
sl@0: 	return(r);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::Val(TUint16 &aVal,TRadix aRadix)
sl@0: /**
sl@0: Parses the string to extract a 16-bit unsigned integer, using the
sl@0: specified radix.
sl@0: 
sl@0: The specified radix is one of binary, octal, decimal, or hexadecimal.
sl@0: 
sl@0: @param aVal   On return, contains the extracted integer.
sl@0: @param aRadix The radix to use when converting the number.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	TUint32 v;
sl@0: 	TInt r=BoundedVal(v,aRadix,0xffffu);
sl@0: 	if (r==KErrNone)
sl@0: 		aVal=(TUint16)v;
sl@0: 	return(r);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::Val(TUint32 &aVal,TRadix aRadix)
sl@0: /**
sl@0: Parses the string to extract a 32-bit unsigned integer, using the
sl@0: specified radix.
sl@0: 
sl@0: The specified radix is one of binary, octal, decimal, or hexadecimal.
sl@0: 
sl@0: @param aVal   On return, contains the extracted integer.
sl@0: @param aRadix The radix to use when converting the number.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	TUint32 v;
sl@0: 	TInt r=BoundedVal(v,aRadix,0xffffffffu);
sl@0: 	if (r==KErrNone)
sl@0: 		aVal=v;
sl@0: 	return(r);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C TInt TLex16::Val(TInt64& aVal, TRadix aRadix)
sl@0: /**
sl@0: Parses the string to extract a 64-bit integer (treated as unsigned), using the
sl@0: specified radix.
sl@0: 
sl@0: The specified radix is one of binary, octal, decimal, or hexadecimal.
sl@0: 
sl@0: @param aVal   On return, contains the extracted integer.
sl@0: @param aRadix The radix to use when converting the number.
sl@0: 
sl@0: @return KErrNone if successful.
sl@0:         KErrGeneral if the next character position is initially at the end of the string
sl@0:         or no valid characters found initially.
sl@0:         KErrOverflow if there is sign overflow, i.e. converted value greater than limit.
sl@0:         If error codes KErrGeneral or KErrOverflow are returned, the object's
sl@0:         members are left unaltered.
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	return BoundedVal(aVal,aRadix,TInt64(UI64LIT(0xffffffffffffffff)));
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: void TLex16::ValidateMark(const TLexMark16 aMark) const
sl@0: //
sl@0: // Asserts that the mark is valid for this lex
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_ALWAYS(aMark.iPtr>=iBuf && aMark.iPtr<=iEnd,Panic(ETLex16MarkOutOfRange));
sl@0: 	}
sl@0: 
sl@0: