userlibandfileserver/fileserver/sfat32/sl_utl.cpp
author John Imhofe <john.imhofe@nokia.com>
Mon, 21 Dec 2009 16:14:42 +0000
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child 33 0173bcd7697c
permissions -rw-r--r--
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// Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#include "sl_std.h"
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//-----------------------------------------------------------------------------
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/**
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    Removes trailing dots from aName.
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    @return new string descriptor that may have its length adjusted
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*/
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TPtrC RemoveTrailingDots(const TDesC& aName)
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{
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    TInt len = aName.Length();
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    while(len > 0)
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    {
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        if(aName[len-1] == '.')
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            len--;
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        else
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            break;
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    }
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    TPtrC ptrNoDots(aName.Ptr(), len);
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    return ptrNoDots;
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}
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TUint32 Log2(TUint32 aVal)
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{
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    __ASSERT_COMPILE(sizeof(TUint32) == 4);
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    ASSERT(aVal);
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    TUint32 bitPos=31;
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    if(!(aVal >> 16)) {bitPos-=16; aVal<<=16;}
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    if(!(aVal >> 24)) {bitPos-=8;  aVal<<=8 ;}
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    if(!(aVal >> 28)) {bitPos-=4;  aVal<<=4 ;}
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    if(!(aVal >> 30)) {bitPos-=2;  aVal<<=2 ;}
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    if(!(aVal >> 31)) {bitPos-=1;}
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    return bitPos;
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}
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TTime DosTimeToTTime(TInt aDosTime,TInt aDosDate)
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//
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//	Deciphers the dos time/date entry information and converts to TTime
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//
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	{
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	TInt secMask=0x1F;
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	TInt minMask=0x07E0;
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	TInt hrMask=0xF800;
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	TInt dayMask=0x1F;
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	TInt monthMask=0x01E0;
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	TInt yearMask=0xFE00;
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	TInt secs=(aDosTime&secMask)*2;
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	TInt mins=(aDosTime&minMask)>>5;
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	TInt hrs=(aDosTime&hrMask)>>11;
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	TInt days=(aDosDate&dayMask)-1;
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	TMonth months=(TMonth)(((aDosDate&monthMask)>>5)-1);
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	TInt years=((aDosDate&yearMask)>>9)+1980;
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	TDateTime datetime;
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	TInt ret=datetime.Set(years,months,days,hrs,mins,secs,0);
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	if (ret==KErrNone)
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		return(TTime(datetime));
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	return(TTime(0));
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	}
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TInt DosTimeFromTTime(const TTime& aTime)
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//
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// Converts a TTime to a dos time
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//
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	{
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	TDateTime dateTime=aTime.DateTime();
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	TInt dosSecs=dateTime.Second()/2;
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	TInt dosMins=dateTime.Minute()<<5;
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	TInt dosHrs=dateTime.Hour()<<11;
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	return dosSecs|dosMins|dosHrs;
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	}
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TInt DosDateFromTTime(const TTime& aTime)
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//
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// Converts a TTime to a dos date
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//
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	{
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	TDateTime dateTime=aTime.DateTime();
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	TInt dosDays=dateTime.Day()+1;
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	TInt dosMonths=(dateTime.Month()+1)<<5;
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	TInt dosYears=(dateTime.Year()-1980)<<9;
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	return dosDays|dosMonths|dosYears;
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	}
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TBuf8<12> DosNameToStdFormat(const TDesC8& aDosName)
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//
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// Converts xxx.yyy to standard format aaaaaaaayyy
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//
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	{
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	__ASSERT_DEBUG(aDosName.Length()>=0 && aDosName.Length()<=12,Fault(EFatBadDosFormatName));
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	TBuf8<12> result;
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	Mem::Fill((TUint8*)result.Ptr(),result.MaxSize(),' ');
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	TInt dotPos=aDosName.Locate('.');
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	if (dotPos==KErrNotFound)
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		{
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		result=aDosName;
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		result.SetLength(11);
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		return result;
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		}
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	result=aDosName.Left(dotPos);
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	result.SetLength(11);
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	TPtr8 ext(&result[8],3);
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	ext=aDosName.Right(aDosName.Length()-dotPos-1);
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	return result;
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	}
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TBuf8<12> DosNameFromStdFormat(const TDesC8& aStdFormatName)
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//
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// Converts aaaaaaaayyy to dos name format xxx.yyy
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//
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	{
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	__ASSERT_DEBUG(aStdFormatName.Length()==11,Fault(EFatBadStdFormatName));
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	TBuf8<12> result;
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	TInt nameLen=aStdFormatName.Locate(' ');
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	if (nameLen>8 || nameLen==KErrNotFound)
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		nameLen=8;
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	result=aStdFormatName.Left(nameLen);
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	TPtrC8 ext(&aStdFormatName[8],3);
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	TInt extLen=ext.Locate(' ');
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	if (extLen)
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		result.Append(TChar('.'));
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	if (extLen==KErrNotFound)
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		extLen=3;
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	result.Append(ext.Left(extLen));
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    if(result.Length() && result[0]==0x05 )
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	    {
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	    result[0]=0xE5;
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	    }
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	return result;
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	}
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TInt NumberOfVFatEntries(TInt aNameLength)
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//
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// Return the number of VFat entries required to describe a filename of length aNameLength
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//
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	{
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	TInt numberOfEntries=0;
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	if (aNameLength%KMaxVFatEntryName)
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		aNameLength++;	//	Include a zero terminator
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//	If aNameLength is a exact multiple of KMaxVFatEntryName, don't bother
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//	with a zero terminator - it just adds an unnecessary directory entry		
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	numberOfEntries=(1+(aNameLength/KMaxVFatEntryName));	
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	if (aNameLength%KMaxVFatEntryName)
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		numberOfEntries++;
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	return(numberOfEntries);
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	}
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//-----------------------------------------------------------------------------
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/** 
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    Calculate DOS short name checksum
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    @param aShortName short name descriptor (must be at least 11 bytes long)
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    @return checksum
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*/
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TUint8 CalculateShortNameCheckSum(const TDesC8& aShortName)
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    {
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    ASSERT(aShortName.Length() >= KFatDirNameSize);
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    const TUint8* pName = aShortName.Ptr();
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    const TUint32 w0 = ((const TUint32*)pName)[0];
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    const TUint32 w1 = ((const TUint32*)pName)[1];
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    TUint32 chkSum = w0 & 0xFF;
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    chkSum = (TUint8)(((chkSum<<7) | (chkSum>>1)) + ((w0 << 16) >> 24));
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    chkSum = (TUint8)(((chkSum<<7) | (chkSum>>1)) + ((w0 << 8)  >> 24));
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    chkSum = (TUint8)(((chkSum<<7) | (chkSum>>1)) + ( w0 >> 24));
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    chkSum = (TUint8)(((chkSum<<7) | (chkSum>>1)) + (w1) & 0xFF);
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    chkSum = (TUint8)(((chkSum<<7) | (chkSum>>1)) + ((w1 << 16) >> 24));
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    chkSum = (TUint8)(((chkSum<<7) | (chkSum>>1)) + ((w1 << 8)  >> 24));
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    chkSum = (TUint8)(((chkSum<<7) | (chkSum>>1)) + ( w1 >> 24));
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    chkSum = (TUint8)(((chkSum<<7) | (chkSum>>1)) + pName[8]);
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    chkSum = (TUint8)(((chkSum<<7) | (chkSum>>1)) + pName[9]);
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    chkSum = (TUint8)(((chkSum<<7) | (chkSum>>1)) + pName[10]);
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    return (TUint8)chkSum;
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    }
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//-----------------------------------------------------------------------------
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const TUint32 K_FFFF = 0xFFFFFFFF; //-- all one bits, beware rigth shifts of signed integers!
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RBitVector::RBitVector()
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          :iNumBits(0), ipData(NULL), iNumWords(0)
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    {
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    }
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RBitVector::~RBitVector()
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    {
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    Close();
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    }
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/**
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    Panics.
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    @param aPanicCode   a panic code
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*/
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void RBitVector::Panic(TPanicCode aPanicCode) const
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    {
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    _LIT(KPanicCat,"RBitVector");
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    User::Panic(KPanicCat, aPanicCode);
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    }
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/** explicitly closes the object and deallocates memory */
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void RBitVector::Close()
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    {
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    iNumBits = 0;
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    iNumWords =0;
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    User::Free(ipData);
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    ipData = NULL;
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    }
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//-----------------------------------------------------------------------------
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/**
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    Comparison perator.
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    @param  aRhs a vector to compate with.
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    @panic ESizeMismatch in the case of different vector sizes
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*/
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TBool RBitVector::operator==(const RBitVector& aRhs) const
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    {
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    __ASSERT_ALWAYS(ipData, Panic(ENotInitialised));
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    __ASSERT_ALWAYS(iNumBits == aRhs.iNumBits, Panic(ESizeMismatch));
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    if(!iNumBits)
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        return ETrue; //-- comparing 0-lenght arrays
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    if(this == &aRhs)
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        return ETrue; //-- comparing with itself
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    if(iNumWords >= 1)
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        {
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        const TUint32 cntBytes = (iNumBits >> 5) << 2; //-- bytes to compare
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        if(memcompare((const TUint8*)ipData, cntBytes, (const TUint8*)aRhs.ipData, cntBytes))
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            return EFalse;
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        }
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    const TUint32 bitsRest  = iNumBits & 0x1F;
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    if(bitsRest)
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        {
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        const TUint32 mask = K_FFFF >> (32-bitsRest);
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        return ( (ipData[iNumWords-1] & mask) == (aRhs.ipData[iNumWords-1] & mask) );
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        }
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    return ETrue;
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    }
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TBool RBitVector::operator!=(const RBitVector& aRhs) const  
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    {
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    return ! ((*this) == aRhs);
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    } 
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//-----------------------------------------------------------------------------
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/** The same as Create(), but leaves on error */
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void RBitVector::CreateL(TUint32 aNumBits)
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    {
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    User::LeaveIfError(Create(aNumBits));
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    }
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/**
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    Create the vector with the size of aNumBits bits.
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    @return system-wide error codes:
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        KErrNoMemory    unable to allocate sufficient amount of memory for the array
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        KErrInUse       an attempt to call Create() for non-empty vector. Close it first.
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        KErrArgument    invalid aNumBits value == 0
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*/
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TInt RBitVector::Create(TUint32 aNumBits)
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    {
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    if(ipData)
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        return KErrInUse; //-- array is already in use. Close it first.
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    if(!aNumBits)
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        return KErrArgument;
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    //-- memory is allocated by word (32 bit) quiantities
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    const TUint32 numWords = (aNumBits >> 5) + ((aNumBits & 0x1F) > 0 ? 1:0);
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    ipData = (TUint32*)User::AllocZ(numWords << 2);
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    if(!ipData)
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        return KErrNoMemory;
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    iNumBits  = aNumBits;
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    iNumWords = numWords;
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    return KErrNone;
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    }
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/**
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    Fill a bit vector with a given bit value
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    @param aVal a bit value
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*/
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void RBitVector::Fill(TBool aVal)
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    {
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    __ASSERT_ALWAYS(ipData, Panic(ENotInitialised));
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    memset(ipData, (aVal ? 0xFF : 0x00), iNumWords << 2);
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    }
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/** Invert all bits in a bit vector */
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void RBitVector::Invert()
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{
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    __ASSERT_ALWAYS(ipData, Panic(ENotInitialised));
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    for(TUint32 i=0; i<iNumWords; ++i)
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        ipData[i] ^= K_FFFF;
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}
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/**
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    Perform "And" operation between 2 vectors. They shall be the same size.
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    @param  aRhs a vector from the right hand side
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    @panic ESizeMismatch in the case of different vector sizes
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*/
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void RBitVector::And(const RBitVector& aRhs)
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    {
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    __ASSERT_ALWAYS(ipData, Panic(ENotInitialised));
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    __ASSERT_ALWAYS(iNumBits == aRhs.iNumBits, Panic(ESizeMismatch));
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    for(TUint32 i=0; i<iNumWords; ++i)
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        {
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        ipData[i] &= aRhs.ipData[i];
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        }
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    }
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/**
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    Perform "Or" operation between 2 vectors. They shall be the same size.    
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    @param  aRhs a vector from the right hand side
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    @panic ESizeMismatch in the case of different vector sizes
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*/
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void RBitVector::Or(const RBitVector& aRhs)
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    {
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    __ASSERT_ALWAYS(ipData, Panic(ENotInitialised));
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    __ASSERT_ALWAYS(iNumBits == aRhs.iNumBits, Panic(ESizeMismatch));
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    for(TUint32 i=0; i<iNumWords; ++i)
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        {
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        ipData[i] |= aRhs.ipData[i];
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        }
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    }
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   372
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parents:
diff changeset
   373
/**
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
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parents:
diff changeset
   374
    Perform "Xor" operation between 2 vectors. They shall be the same size.    
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John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   375
    @param  aRhs a vector from the right hand side
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   376
    @panic ESizeMismatch in the case of different vector sizes
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   377
*/
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   378
void RBitVector::Xor(const RBitVector& aRhs)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   379
    {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   380
    __ASSERT_ALWAYS(ipData, Panic(ENotInitialised));
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   381
    __ASSERT_ALWAYS(iNumBits == aRhs.iNumBits, Panic(ESizeMismatch));
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   382
    for(TUint32 i=0; i<iNumWords; ++i)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   383
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   384
        ipData[i] ^= aRhs.ipData[i];
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   385
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   386
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   387
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   388
//-----------------------------------------------------------------------------
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   389
/**
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   390
    Fill a range from bit number "aIndexFrom" to "aIndexTo" inclusively with the value of aVal
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   391
    
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   392
    @param  aIndexFrom  start bit number (inclusive)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   393
    @param  aIndexTo    end bit number (inclusive)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   394
    @param  aVal        the value to be used to fill the range (0s or 1s)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   395
*/
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   396
void RBitVector::Fill(TUint32 aIndexFrom, TUint32 aIndexTo, TBool aVal)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   397
    {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   398
    __ASSERT_ALWAYS(ipData, Panic(ENotInitialised));
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   399
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   400
    //-- swap indexes if they are not in order
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   401
    if(aIndexFrom > aIndexTo)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   402
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   403
        const TUint32 tmp = aIndexFrom;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   404
        aIndexFrom = aIndexTo;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   405
        aIndexTo = tmp;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   406
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   407
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   408
    __ASSERT_ALWAYS((aIndexFrom < iNumBits) && (aIndexTo < iNumBits), Panic(EIndexOutOfRange));
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   409
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   410
    const TUint32 wordStart = WordNum(aIndexFrom);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   411
    const TUint32 wordTo    = WordNum(aIndexTo);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   412
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   413
    if(aVal)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   414
        {//-- filling a range with '1'
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   415
        
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   416
        TUint32 shift = BitInWord(aIndexFrom);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   417
        const TUint32 mask1 = (K_FFFF >> shift) << shift;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   418
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   419
        TUint32 mask2 = K_FFFF;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   420
        shift = 1+BitInWord(aIndexTo);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   421
        if(shift < 32)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   422
            {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   423
            mask2 = ~((mask2 >> shift) << shift);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   424
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   425
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   426
        if(wordTo == wordStart)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   427
            {//-- a special case, filling is in the same word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   428
            ipData[wordStart] |= (mask1 & mask2);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   429
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   430
        else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   431
            {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   432
            ipData[wordStart] |= mask1; 
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   433
            ipData[wordTo]    |= mask2;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   434
            
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   435
            const TUint32 wholeWordsBetween = wordTo - wordStart - 1; //-- whole words that can be bulk filled
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   436
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   437
            if(wholeWordsBetween)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   438
                memset(ipData+wordStart+1, 0xFF, wholeWordsBetween << 2);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   439
                            
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   440
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   441
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   442
    else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   443
        {//-- filling a range with '0'
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   444
        
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   445
        //-- if you need this functionality, remove the panic and uncomment the code below.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   446
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   447
        Panic(ENotImplemented);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   448
        
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   449
        /*
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   450
        TUint32 shift = BitInWord(aIndexFrom);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   451
        const TUint32 mask1 = ~((K_FFFF >> shift) << shift);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   452
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   453
        TUint32 mask2 = 0;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   454
        shift = 1+BitInWord(aIndexTo);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   455
        if(shift < 32)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   456
            {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   457
            mask2 = ((K_FFFF >> shift) << shift);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   458
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   459
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   460
        if(wordTo == wordStart)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   461
            {//-- a special case, filling is in the same word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   462
            ipData[wordStart] &= (mask1 | mask2);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   463
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   464
        else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   465
            {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   466
            ipData[wordStart] &= mask1; 
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   467
            ipData[wordTo]    &= mask2;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   468
            
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   469
            const TUint32 wholeWordsBetween = wordTo - wordStart - 1; //-- whole words that can be bulk filled
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   470
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   471
            if(wholeWordsBetween)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   472
                memset(ipData+wordStart+1, 0x00, wholeWordsBetween << 2);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   473
                            
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   474
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   475
        */
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   476
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   477
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   478
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   479
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   480
//-----------------------------------------------------------------------------
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   481
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   482
/**
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   483
    Search for a specified bit value ('0' or '1') in the vector from the given position.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   484
    @param  aStartPos   zero-based index; from this position the search will start. This position isn't included to the search.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   485
                        On return may contain a new position if the specified bit is found in specified direction.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   486
    @param  aBitVal     zero or non-zero bit to search.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   487
    @param  aDir        Specifies the search direction
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   488
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   489
    @return ETrue if the specified bit value is found; aStartPos gets updated.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   490
            EFalse otherwise.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   491
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   492
*/
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   493
TBool RBitVector::Find(TUint32& aStartPos, TBool aBitVal, TFindDirection aDir) const
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   494
    {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   495
    __ASSERT_ALWAYS(aStartPos < iNumBits, Panic(EIndexOutOfRange));
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   496
    ASSERT(iNumWords && ipData);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   497
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   498
    switch(aDir)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   499
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   500
        case ERight:    //-- Search from the given position to the right
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   501
            return FindToRight(aStartPos, aBitVal);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   502
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   503
        case ELeft:     //-- Search from the given position to the left (towards lower index)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   504
            return FindToLeft(aStartPos, aBitVal);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   505
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   506
        case ENearestL: //-- Search for the nearest value in both directions starting from left
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   507
            return FindNearest(aStartPos, aBitVal, ETrue);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   508
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   509
        case ENearestR: //-- Search for the nearest value in both directions starting from right
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   510
            return FindNearest(aStartPos, aBitVal, EFalse);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   511
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   512
        default:
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   513
            Panic(EWrondFindDirection);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   514
            return EFalse;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   515
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   516
        };
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   517
    
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   518
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   519
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   520
//-----------------------------------------------------------------------------
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   521
/**
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   522
    Internal method to look for a given bit value in the right direction.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   523
    see TBool RBitVector::Find(...)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   524
*/
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   525
TBool RBitVector::FindToRight(TUint32& aStartPos, TBool aBitVal) const
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   526
    {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   527
    if(aStartPos >= iNumBits-1)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   528
        return EFalse; //-- no way to the right
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   529
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   530
    const TUint32 startPos = aStartPos+1;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   531
    const TUint32 fInvert = aBitVal ? 0 : K_FFFF; //-- invert everything if we are looking for '0' bit
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   532
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   533
    TUint32 wordNum = WordNum(startPos);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   534
    TUint32 val = ipData[wordNum] ^ fInvert;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   535
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   536
    if(wordNum == iNumWords-1)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   537
        {//-- process the last word in the array, some higher bits might not belong to the bit vector
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   538
        val = MaskLastWord(val);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   539
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   540
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   541
    const TUint32 shift = BitInWord(startPos);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   542
    val = (val >> shift) << shift; //-- mask unused low bits
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   543
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   544
    if(val)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   545
        {//-- there are '1' bits in the current word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   546
        goto found;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   547
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   548
    else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   549
        {//-- search in higher words
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   550
        wordNum++;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   551
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   552
        while(iNumWords-wordNum > 1)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   553
            {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   554
            val = ipData[wordNum] ^ fInvert;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   555
            if(val)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   556
                goto found;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   557
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   558
            wordNum++;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   559
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   560
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   561
        if(wordNum == iNumWords-1)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   562
            {//-- process the last word in the array, some higher bith might not belong to the bit vector
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   563
            val = ipData[wordNum] ^ fInvert;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   564
            val = MaskLastWord(val);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   565
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   566
            if(val)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   567
                goto found;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   568
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   569
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   570
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   571
    return EFalse; //-- haven't found anything
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   572
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   573
  found:
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   574
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   575
    val &= (~val+1); //-- select rightmost bit
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   576
    aStartPos = (wordNum << 5)+Log2(val);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   577
    return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   578
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   579
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   580
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   581
//-----------------------------------------------------------------------------
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   582
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   583
/**
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   584
    Internal method to look for a given bit value in the left direction.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   585
    see TBool RBitVector::Find(...)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   586
*/
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   587
TBool RBitVector::FindToLeft(TUint32& aStartPos, TBool aBitVal) const
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   588
{
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   589
    if(!aStartPos)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   590
        return EFalse; //-- no way to the left
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   591
    
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   592
    const TUint32 startPos=aStartPos-1;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   593
    const TUint32 fInvert = aBitVal ? 0 : K_FFFF; //-- invert everything if we are looking for '0' bit
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   594
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   595
    TUint32 wordNum = WordNum(startPos);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   596
    TUint32 val = ipData[wordNum] ^ fInvert;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   597
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   598
    const TUint32 shift = 31-(BitInWord(startPos));
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   599
    val = (val << shift) >> shift; //-- mask unused high bits
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   600
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   601
    if(val)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   602
    {//-- there are '1' bits in the current word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   603
        goto found;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   604
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   605
    else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   606
    {//-- search in the lower words
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   607
        while(wordNum)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   608
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   609
            wordNum--;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   610
            val=ipData[wordNum] ^ fInvert;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   611
            if(val)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   612
                goto found;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   613
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   614
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   615
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   616
    return EFalse; //-- nothing found
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   617
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   618
 found:
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   619
    aStartPos = (wordNum << 5)+Log2(val);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   620
    return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   621
}
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   622
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   623
//-----------------------------------------------------------------------------
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   624
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   625
/**
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   626
    Internal method to look for a given bit value in the both directions.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   627
    see TBool RBitVector::Find(...)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   628
*/
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   629
TBool RBitVector::FindNearest(TUint32& aStartPos, TBool aBitVal, TBool aToLeft) const
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   630
{
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   631
    if(iNumBits < 2)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   632
        return EFalse;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   633
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   634
    if(aStartPos == 0)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   635
        return FindToRight(aStartPos, aBitVal);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   636
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   637
    if(aStartPos == iNumBits-1)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   638
        return FindToLeft(aStartPos, aBitVal);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   639
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   640
    
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   641
    const TUint32 fInvert = aBitVal ? 0 : K_FFFF; //-- invert everything if we are looking for '0' bit
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   642
    
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   643
    TUint32 wordNum = WordNum(aStartPos);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   644
    TUint32 l_Idx; //-- index of the word to the left
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   645
    TUint32 r_Idx; //-- index of the word to the right
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   646
    
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   647
    l_Idx = r_Idx = wordNum;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   648
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   649
    TBool   noWayLeft  = (wordNum == 0);            //-- if we are in the first word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   650
    TBool   noWayRight = (wordNum == iNumWords-1);  //-- if we are in the last word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   651
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   652
    //-- look in the current word first
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   653
    TUint32 val = ipData[wordNum] ^ fInvert;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   654
    
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   655
    if(noWayRight)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   656
    {   //-- this is the last word in the array, mask unused high bits in the last word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   657
        val = MaskLastWord(val);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   658
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   659
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   660
    const TUint32 bitPos = aStartPos & 0x1F;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   661
    val &= ~(1<<bitPos); //-- mask the bit at current position
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   662
    
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   663
    if(val == 0)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   664
    {//-- no '1' bits in the current word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   665
        noWayLeft  = ItrLeft(l_Idx);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   666
        noWayRight = ItrRight(r_Idx);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   667
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   668
    else if(bitPos == 0)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   669
    {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   670
        noWayLeft = ItrLeft(l_Idx); //-- move to the previous word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   671
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   672
    else if(bitPos == 31)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   673
    {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   674
        noWayRight = ItrRight(r_Idx); //-- move to the next word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   675
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   676
    else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   677
    {//-- look in the current word, in both halves to the left and right from the start position
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   678
        
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   679
        const TUint32 shift1 = 32-bitPos;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   680
        const TUint32 partLo = (val << shift1) >> shift1; //-- towards lower bits
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   681
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   682
        const TUint32 shift2 = bitPos+1;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   683
        const TUint32 partHi = (val >> shift2) << shift2; //-- towards higher bits 
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   684
        
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   685
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   686
        if(partLo && !partHi) //-- only lower part has '1' bits   
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   687
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   688
            aStartPos = (wordNum << 5)+Log2(partLo);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   689
            return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   690
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   691
        else if(!partLo && partHi) //-- only higher part has '1' bits
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   692
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   693
            aStartPos = (wordNum << 5)+Log2( (partHi & (~partHi+1)) );
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   694
            return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   695
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   696
        else if(partLo && partHi) //-- both parts contain '1' bits, select the nearest one
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   697
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   698
            const TUint32 posL = (wordNum << 5)+Log2(partLo);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   699
            const TUint32 posR = (wordNum << 5)+Log2( (partHi & (~partHi+1)) );
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   700
        
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   701
            ASSERT(aStartPos > posL);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   702
            ASSERT(posR > aStartPos);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   703
            const TUint32 distL = aStartPos-posL;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   704
            const TUint32 distR = posR-aStartPos;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   705
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   706
            if(distL < distR)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   707
            {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   708
                aStartPos = posL;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   709
                return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   710
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   711
            else if(distL > distR)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   712
            {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   713
                aStartPos = posR;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   714
                return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   715
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   716
            else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   717
            {//-- distL == distR, take into account search priority
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   718
                aStartPos = aToLeft ? posL : posR;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   719
                return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   720
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   721
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   722
        else //-- (!partLo && !partHi), nothing in the current word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   723
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   724
            ASSERT(0);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   725
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   726
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   727
    }// if(bitPos > 0 && bitPos < 31)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   728
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   729
    //-- now we are processing separate words from both sides of the search position
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   730
    for(;;)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   731
    { 
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   732
        TUint32 wL = ipData[l_Idx] ^ fInvert;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   733
        TUint32 wR = ipData[r_Idx] ^ fInvert;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   734
        if(r_Idx == iNumWords-1)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   735
        {   //-- this is the last word in the array, mask unused high bits in the last word
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   736
            wR = MaskLastWord(wR);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   737
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   738
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   739
        if(wL && !wR)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   740
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   741
            aStartPos = (l_Idx << 5)+Log2(wL);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   742
            return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   743
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   744
        else if(!wL && wR)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   745
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   746
            aStartPos = (r_Idx << 5)+Log2( (wR & (~wR+1)) );
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   747
            return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   748
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   749
        else if(wL && wR)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   750
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   751
            const TUint32 posL = (l_Idx << 5)+Log2(wL);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   752
            const TUint32 posR = (r_Idx << 5)+Log2( (wR & (~wR+1)) );
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   753
        
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   754
            ASSERT(aStartPos > posL);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   755
            ASSERT(posR > aStartPos);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   756
            const TUint32 distL = aStartPos-posL;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   757
            const TUint32 distR = posR-aStartPos;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   758
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   759
            if(distL < distR)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   760
            {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   761
                aStartPos = posL;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   762
                return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   763
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   764
            else if(distL > distR)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   765
            {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   766
                aStartPos = posR;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   767
                return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   768
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   769
            else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   770
            {//-- distL == distR, take into account search priority
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   771
                aStartPos = aToLeft ? posL : posR;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   772
                return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   773
            }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   774
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   775
        }//else if(wL && wR)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   776
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   777
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   778
        if(noWayLeft)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   779
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   780
            aStartPos = r_Idx << 5;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   781
            return FindToRight(aStartPos, aBitVal);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   782
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   783
        else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   784
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   785
            noWayLeft  = ItrLeft(l_Idx);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   786
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   787
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   788
        if(noWayRight)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   789
        {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   790
            aStartPos = l_Idx << 5;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   791
            return FindToLeft(aStartPos, aBitVal);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   792
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   793
        else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   794
        {    
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   795
            noWayRight = ItrRight(r_Idx);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   796
        }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   797
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   798
   }//for(;;)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   799
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   800
    //return EFalse;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   801
}
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   802
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   803
//-----------------------------------------------------------------------------
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   804
/**
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   805
    Find out if two vectors are different.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   806
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   807
    @param  aRhs        vector to compare with
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   808
    @param  aDiffIndex  if there is a differene, here will be the number of the first different bit
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   809
    @return ETrue if vectors differ, EFalse, if they are identical.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   810
*/
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   811
TBool RBitVector::Diff(const RBitVector& aRhs, TUint32& aDiffIndex) const
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   812
{
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   813
    __ASSERT_ALWAYS(ipData, Panic(ENotInitialised));
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   814
    __ASSERT_ALWAYS(iNumBits == aRhs.iNumBits, Panic(ESizeMismatch));
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   815
    ASSERT(iNumWords > 0);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   816
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   817
    TUint32 diffWord=0;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   818
    TUint32 wordNum=0;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   819
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   820
    //-- compare all but the last word in the array
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   821
    for(wordNum=0; wordNum < iNumWords-1; ++wordNum)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   822
    {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   823
        diffWord = ipData[wordNum] ^ aRhs.ipData[wordNum];
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   824
        if(diffWord)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   825
            break;  //-- found difference
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   826
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   827
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   828
    //-- process the last word in the array
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   829
    if(!diffWord)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   830
    {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   831
        diffWord = MaskLastWord(ipData[wordNum]) ^ MaskLastWord(aRhs.ipData[wordNum]);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   832
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   833
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   834
    if(!diffWord)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   835
        return EFalse; //-- vectors are the same
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   836
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   837
    //-- calculate the position of the bit that different.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   838
    diffWord &= (~diffWord+1); //-- select rightmost bit
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   839
    aDiffIndex = (wordNum << 5)+Log2(diffWord);
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   840
    
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   841
    return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   842
}
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   843
//-----------------------------------------------------------------------------
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   844
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   845
/**
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   846
    Iterate to the left (towards lower index) in the array of words ipData
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   847
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   848
    @param  aIdx index within ipData array to be decremented; if it's possible to move left, it will be decreased
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   849
    @return ETrue if there is no way left i.e. aIdx is 0. EFalse otherwise and aIdx decreased.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   850
*/
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   851
TBool RBitVector::ItrLeft(TUint32& aIdx) const
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   852
{
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   853
    if(aIdx == 0)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   854
        return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   855
    else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   856
    {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   857
        aIdx--;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   858
        return EFalse;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   859
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   860
}
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   861
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   862
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   863
/**
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   864
    Iterate to the right (towards higher index) in the array of words ipData
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   865
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   866
    @param  aIdx index within ipData array to be incremented; if it's possible to move right, it will be increased
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   867
    @return ETrue if there is no way right i.e. aIdx corresponds to the last word. EFalse otherwise and aIdx increased.
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   868
*/
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   869
TBool RBitVector::ItrRight(TUint32& aIdx) const
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   870
{
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   871
    if(aIdx < iNumWords-1)
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   872
    {
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   873
        aIdx++;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   874
        return EFalse;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   875
    }
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   876
    else
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   877
        return ETrue;
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   878
}
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   879
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   880
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   881
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   882
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   883
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   884
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   885
4122176ea935 Revision: 200948 + Removing redundant base integration tests and fixing build errors
John Imhofe <john.imhofe@nokia.com>
parents:
diff changeset
   886