mirror of
https://github.com/NishiOwO/ircservices5.git
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87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
/* Ignore handling.
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*
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* IRC Services is copyright (c) 1996-2009 Andrew Church.
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* E-mail: <achurch@achurch.org>
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* Parts written by Andrew Kempe and others.
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* This program is free but copyrighted software; see the file GPL.txt for
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* details.
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*/
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#include "services.h"
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/*************************************************************************/
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/* ignore_init: Initialize ignore-related fields of a new User structure. */
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void ignore_init(User *u)
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{
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u->ignore = 0;
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u->lastcmd = time_msec();
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u->lastcmd_s = time(NULL);
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}
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/*************************************************************************/
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/* ignore_update: Update the user's ignore level. The "ignore level" is a
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* measure of how much time Services has spent processing
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* this user's commands, and is calculated as a decaying
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* average of the fraction of time spent on the user's
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* commands over the total time Services has been running--
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* more specifically, the average over time of a function
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* whose value is 1 when Services is executing a command
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* from the user and 0 at all other times. The rate of
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* decay of the average, and hence the rate of response to
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* new commands, is dependent on the IgnoreDecay
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* configuration setting: the average decays by half every
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* IgnoreDecay milliseconds (note that the value is given as
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* seconds in the configuration file).
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* The `msec' parameter to this function is the length
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* of time taken by the most recent command (which caused
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* this update). `msec' may be specified as zero to update
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* the user's ignore level at any time.
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*/
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void ignore_update(User *u, uint32 msec)
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{
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time_t now;
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uint32 now_msec;
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if (!IgnoreDecay) {
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/* Ignore code disabled, just return */
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return;
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}
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now = time(NULL);
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now_msec = time_msec();
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if (now - u->lastcmd_s > 1000000) {
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/* Millisecond counter may have overflowed, just reset to 0 */
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u->ignore = 0;
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} else {
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double zerolen = (now_msec - msec) - u->lastcmd;
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if (zerolen > 0)
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u->ignore *= pow(2, -(zerolen / IgnoreDecay));
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}
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if (msec) {
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double factor;
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while (msec > IgnoreDecay) {
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u->ignore = u->ignore*0.5 + 0.5;
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msec -= IgnoreDecay;
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}
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factor = pow(2, -((double)msec / IgnoreDecay));
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u->ignore = u->ignore*factor + (1-factor);
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}
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u->lastcmd = now_msec;
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u->lastcmd_s = now;
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}
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/*************************************************************************/
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/*
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* Local variables:
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* c-file-style: "stroustrup"
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* c-file-offsets: ((case-label . *) (statement-case-intro . *))
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* indent-tabs-mode: nil
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* End:
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*
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* vim: expandtab shiftwidth=4:
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*/
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