transmission/libtransmission/history.c

59 lines
1.3 KiB
C

/*
* This file Copyright (C) Mnemosyne LLC
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2 (b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
* $Id$
*/
#include <assert.h>
#include <string.h> /* memset () */
#include "transmission.h"
#include "history.h"
#include "utils.h"
void
tr_historyAdd (tr_recentHistory * h, time_t now, unsigned int n)
{
if (h->slices[h->newest].date == now)
{
h->slices[h->newest].n += n;
}
else
{
if (++h->newest == TR_RECENT_HISTORY_PERIOD_SEC)
h->newest = 0;
h->slices[h->newest].date = now;
h->slices[h->newest].n = n;
}
}
unsigned int
tr_historyGet (const tr_recentHistory * h, time_t now, unsigned int sec)
{
unsigned int n = 0;
const time_t cutoff = (now?now:tr_time ()) - sec;
int i = h->newest;
for (;;)
{
if (h->slices[i].date <= cutoff)
break;
n += h->slices[i].n;
if (--i == -1)
i = TR_RECENT_HISTORY_PERIOD_SEC - 1; /* circular history */
if (i == h->newest)
break; /* we've come all the way around */
}
return n;
}