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/*
* This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Affero General Public License as published by the
* Free Software Foundation; either version 3 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 Affero General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __AVGDIFFTRACKER_H
#define __AVGDIFFTRACKER_H
#include "Common.h"
#include <cstring>
#define AVG_DIFF_COUNT 500
class AvgDiffTracker
{
public:
AvgDiffTracker() : total(0), index(0), average(0) { memset(&tab, 0, sizeof(tab)); max[0] = 0; max[1] = 0; }
uint32 getAverage()
{
return average;
}
uint32 getTimeWeightedAverage()
{
if (tab[AVG_DIFF_COUNT - 1] == 0)
return 0;
uint32 sum = 0, weightsum = 0;
for (uint32 i = 0; i < AVG_DIFF_COUNT; ++i)
{
sum += tab[i] * tab[i];
weightsum += tab[i];
}
return sum / weightsum;
}
uint32 getMax()
{
return max[0] > max[1] ? max[0] : max[1];
}
void Update(uint32 diff)
{
if (diff < 1)
diff = 1;
total -= tab[index];
total += diff;
tab[index] = diff;
if (diff > max[0])
max[0] = diff;
if (++index >= AVG_DIFF_COUNT)
{
index = 0;
max[1] = max[0];
max[0] = 0;
}
if (tab[AVG_DIFF_COUNT - 1])
average = total / AVG_DIFF_COUNT;
else if (index)
average = total / index;
else
average = 0;
}
private:
uint32 tab[AVG_DIFF_COUNT];
uint32 total;
uint32 index;
uint32 max[2];
uint32 average;
};
extern AvgDiffTracker avgDiffTracker;
extern AvgDiffTracker lfgDiffTracker;
extern AvgDiffTracker devDiffTracker;
#endif
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