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/****************************************************************************
* Timing functions.
* Copyright (C) 2004 Joe Wingbermuehle
****************************************************************************/
#include "jwm.h"
#include "timing.h"
static const unsigned long MAX_TIME_SECONDS = 60;
/****************************************************************************
* Get the current time in milliseconds since midnight 1970-01-01 UTC.
****************************************************************************/
void GetCurrentTime(TimeType *t) {
struct timeval val;
gettimeofday(&val, NULL);
t->seconds = val.tv_sec;
t->ms = val.tv_usec / 1000;
}
/****************************************************************************
* Get the absolute difference between two times in milliseconds.
* If the difference is larger than a MAX_TIME_SECONDS, then
* MAX_TIME_SECONDS will be returned.
* Note that the times must be normalized.
****************************************************************************/
unsigned long GetTimeDifference(const TimeType *t1, const TimeType *t2) {
unsigned long deltaSeconds;
int deltaMs;
if(t1->seconds > t2->seconds) {
deltaSeconds = t1->seconds - t2->seconds;
deltaMs = t1->ms - t2->ms;
} else if(t1->seconds < t2->seconds) {
deltaSeconds = t2->seconds - t1->seconds;
deltaMs = t2->ms - t1->ms;
} else if(t1->ms > t2->ms) {
deltaSeconds = 0;
deltaMs = t1->ms - t2->ms;
} else {
deltaSeconds = 0;
deltaMs = t2->ms - t1->ms;
}
if(deltaSeconds > MAX_TIME_SECONDS) {
return MAX_TIME_SECONDS * 1000;
} else {
return deltaSeconds * 1000 + deltaMs;
}
}
/****************************************************************************
* Get the current time.
* Not reenterent.
****************************************************************************/
const char *GetTimeString(const char *format) {
static char str[80];
time_t t;
Assert(format);
time(&t);
strftime(str, sizeof(str), format, localtime(&t));
return str;
}
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