C++ TLex::SkipSpace方法代码示例

TBool TfrLex::Eat( TLex& aLex, const TChar aChar )
{
TLexMark unget;
if ( aChar.IsSpace() )
	{
	// A space character requires its own logic = go over
	// the other space characters - x gets the next char.
	TChar x;
	aLex.Mark(unget);
	while ( x = aLex.Get(), x.IsSpace() && x != aChar )
		{};
	if ( x == aChar ) 
		return ETrue;
	}
else
	{
	// For other, non-space, characters: skip spaces and
	// get the next character x.
	aLex.SkipSpace();
	aLex.Mark(unget);
	if ( aLex.Get() == aChar ) 
	return ETrue;
	}

// The character wasn't there, unget to the start point.
aLex.UnGetToMark(unget);
return EFalse;
}

TBool TfrLex::EatF( TLex& aLex, const TDesC& aTerm )
{
aLex.SkipSpace();
TLexMark unget;
aLex.Mark(unget);
if ( ValF(aLex,aTerm) == KErrNone ) return ETrue;
aLex.UnGetToMark(unget);
return EFalse;
} 

TPtrC TfrLex::GetL( TLex& aLex, const TChar  aChar )
{
// Skip spaces and mark the token's start point.
aLex.SkipSpace();
TLexMark mark;

aLex.Mark(mark);    

if (aLex.Peek() == '"' )
	{
	// Skip the " and do find next " followed by eos, space or aChar.
	aLex.Inc();
	TChar x;
	while ( x = aLex.Get(), !x.Eos() )
		{
		if ( x == '"' )
			{
			// Found a " character - but is it the end of the token?
			x = aLex.Peek(); // peek the next character
			if ( x.Eos() || x.IsSpace() || x == aChar )
				// End of token: return token.
				return aLex.MarkedToken(mark);
			}
		}
	// Unget and L E A V E because did not find the end " of token.
	aLex.UnGetToMark(mark);
	User::Leave(KErrArgument);
	return aLex.MarkedToken(mark); // never reached (l e a v e).
	}
else
	{
	// Is not a "*" token: find eos or the next space or the aChar
	// and return the token.
	TChar x;
	while ( x = aLex.Peek(), !x.Eos() && !x.IsSpace() && x != aChar )
		aLex.Inc();

	return aLex.MarkedToken(mark);
	}
}

/**
Search algorithm for searching phone numbers

@param aText Text that will be parsed
@return ETrue if any Phone Number items were found else returns EFalse
@leave KErrNone, if successful; otherwise one of the other system-wide error codes.
@panic ETulPanicDescriptorLength in debug build if item's position 
and/or length is out of the document's range.
*/
TBool CTulAddressStringTokenizer::SearchPhoneNumberL( const TDesC& aText )
    {
    TLexMark startMark; // Points to the start of the found phone number
    TLexMark endMark; // Points to the end of the found phone number
    TLexMark mark;
    const TInt end = aText.Length();

    TLex number = aText;

    while ( !(number.Eos()) )
        {
        TInt numberCount = 0; // How many real numbers (1234567890)
        TInt bracketsOpen = 0; // How many brackets are currently open
        TInt brackets = 0; // How many brackets overall

        TChar charac = number.Peek();

        while( (!(IsValidPhoneNumberChar( charac ) || charac == '+'
               || charac == '(' ) || charac == '-' || charac == '.' || charac == '/') 
			   && !(number.Eos()) && number.Offset() < end )
            {
            number.Inc();
            charac = number.Peek();
            }

        if ( number.Offset() >= end )
            break;
        
        if ( number.Peek() == '#' )
			{
			number.Inc();
			if (number.Peek() == '.' )
				continue;

			number.UnGet();
			}

        if ( number.Peek() == '+' )
            { // '+' has to be followed by a number (not # or * ...)
            number.Inc();
            if ( !(number.Peek().IsDigit()) )
                continue;

            number.UnGet();
            }

        if ( number.Peek() == '(' )
            { // '(' has to be followed by valid phone number 
              // character (whitespaces are allowed before) or '+' is a next character
            number.Inc();
            if ( !(number.Peek() == '+') )
                {
                number.Mark(mark);
                number.SkipSpace();
                charac = number.Peek();
                if ( !( IsValidPhoneNumberChar(charac) || charac == '+' 
                    || charac == '(' ) || charac == '-' || charac == '.' || charac == '/')
                    {
                    number.Inc();
                    continue;
                    }
                else
                    {
                    number.UnGetToMark(mark);
                    number.UnGet();
                    number.Mark(startMark);
                    }
                } 
            else
                {
                number.UnGet();
                number.Mark(startMark);
                number.Inc();
                }

            bracketsOpen++;
            brackets++;
            }
        else
            number.Mark(startMark);

        if ( number.Peek().IsDigit() )	// If the character was a number
            numberCount++;
        else if ( bracketsOpen > 0 ) 
            { 
            number.Inc();
            TChar next  = number.Peek();
            TInt bracketsOpen2 = bracketsOpen;
            while( (IsValidPhoneNumberChar( next ) || next.IsSpace()
                || next == '(' || next == ')' || next == 'p' || next == '+'
                || next == 'w' ) && !(number.Eos()) && number.Offset() < end)
//.........这里部分代码省略.........