mirror of
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71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2021 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "common/runningavg.h"
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#include <stdlib.h>
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struct RunningAvg
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{
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int length, samples;
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int pos;
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int64_t value;
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int64_t values[0];
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};
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RunningAvg runningavg_new(int length)
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{
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struct RunningAvg * ra = calloc(1, sizeof(*ra) + sizeof(*ra->values) * length);
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ra->length = length;
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return ra;
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}
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void runningavg_free(RunningAvg * ra)
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{
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free(*ra);
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*ra = NULL;
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}
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void runningavg_push(RunningAvg ra, int64_t value)
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{
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if (ra->samples == ra->length)
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ra->value -= ra->values[ra->pos];
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else
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++ra->samples;
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ra->value += value;
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ra->values[ra->pos++] = value;
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if (ra->pos == ra->length)
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ra->pos = 0;
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}
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void runningavg_reset(RunningAvg ra)
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{
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ra->samples = 0;
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ra->pos = 0;
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ra->value = 0;
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}
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double runningavg_calc(RunningAvg ra)
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{
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return (double)ra->value / ra->samples;
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}
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