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21 lines
436 B
C++
21 lines
436 B
C++
#include "stdafx.h"
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#include <string.h>
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#include <time.h>
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#include "util.h"
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double util::stamp_sub(const struct timeval *from, const struct timeval *sub_by)
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{
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struct timeval res;
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memcpy(&res, from, sizeof(struct timeval));
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res.tv_usec -= sub_by->tv_usec;
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if (res.tv_usec < 0) {
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--res.tv_sec;
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res.tv_usec += 1000000;
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}
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res.tv_sec -= sub_by->tv_sec;
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return (res.tv_sec * 1000.0 + res.tv_usec/1000.0);
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}
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