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/*
* Copyright (C) 2005-2008 MaNGOS <http://www.mangosproject.org/>
*
* Copyright (C) 2008 Trinity <http://www.trinitycore.org/>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __UPDATEMASK_H
#define __UPDATEMASK_H
#include "UpdateFields.h"
#include "Errors.h"
class UpdateMask
{
public:
UpdateMask( ) : mCount( 0 ), mBlocks( 0 ), mUpdateMask( 0 ) { }
UpdateMask( const UpdateMask& mask ) : mUpdateMask( 0 ) { *this = mask; }
~UpdateMask( )
{
if(mUpdateMask)
delete [] mUpdateMask;
}
void SetBit (uint32 index)
{
( (uint8 *)mUpdateMask )[ index >> 3 ] |= 1 << ( index & 0x7 );
}
void UnsetBit (uint32 index)
{
( (uint8 *)mUpdateMask )[ index >> 3 ] &= (0xff ^ (1 << ( index & 0x7 ) ) );
}
bool GetBit (uint32 index) const
{
return ( ( (uint8 *)mUpdateMask)[ index >> 3 ] & ( 1 << ( index & 0x7 ) )) != 0;
}
uint32 GetBlockCount() const { return mBlocks; }
uint32 GetLength() const { return mBlocks << 2; }
uint32 GetCount() const { return mCount; }
uint8* GetMask() { return (uint8*)mUpdateMask; }
void SetCount (uint32 valuesCount)
{
if(mUpdateMask)
delete [] mUpdateMask;
mCount = valuesCount;
mBlocks = (valuesCount + 31) / 32;
mUpdateMask = new uint32[mBlocks];
memset(mUpdateMask, 0, mBlocks << 2);
}
void Clear()
{
if (mUpdateMask)
memset(mUpdateMask, 0, mBlocks << 2);
}
UpdateMask& operator = ( const UpdateMask& mask )
{
SetCount(mask.mCount);
memcpy(mUpdateMask, mask.mUpdateMask, mBlocks << 2);
return *this;
}
void operator &= ( const UpdateMask& mask )
{
ASSERT(mask.mCount <= mCount);
for (uint32 i = 0; i < mBlocks; i++)
mUpdateMask[i] &= mask.mUpdateMask[i];
}
void operator |= ( const UpdateMask& mask )
{
ASSERT(mask.mCount <= mCount);
for (uint32 i = 0; i < mBlocks; i++)
mUpdateMask[i] |= mask.mUpdateMask[i];
}
UpdateMask operator & ( const UpdateMask& mask ) const
{
ASSERT(mask.mCount <= mCount);
UpdateMask newmask;
newmask = *this;
newmask &= mask;
return newmask;
}
UpdateMask operator | ( const UpdateMask& mask ) const
{
ASSERT(mask.mCount <= mCount);
UpdateMask newmask;
newmask = *this;
newmask |= mask;
return newmask;
}
private:
uint32 mCount;
uint32 mBlocks;
uint32 *mUpdateMask;
};
#endif
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