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// -*- mode: c++; c-file-style: "k&r"; c-basic-offset: 4 -*-
/***********************************************************************
*
* timeval.h:
* utility functions for manipulating timevals
*
* Copyright 2013-2015 Irene Zhang <iyzhang@cs.washington.edu>
* Naveen Kr. Sharma <naveenks@cs.washington.edu>
* Dan R. K. Ports <drkp@cs.washington.edu>
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* Copyright 2009-2012 Massachusetts Institute of Technology
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
**********************************************************************/
#ifndef _LIB_TIMEVAL_H_
#define _LIB_TIMEVAL_H_
#include <sys/time.h>
#include <time.h> /* strftime */
#include <stdlib.h> /* malloc */
#include <stdio.h> /* sprintf */
#include <string.h>
static inline struct timeval
timeval_sub(struct timeval a, struct timeval b) {
struct timeval result;
if (a.tv_usec < b.tv_usec) {
result.tv_sec = a.tv_sec - b.tv_sec - 1;
result.tv_usec = a.tv_usec + 1000000 - b.tv_usec;
} else {
result.tv_sec = a.tv_sec - b.tv_sec;
result.tv_usec = a.tv_usec - b.tv_usec;
}
return result;
};
static inline bool
timeval_lessthan(struct timeval a, struct timeval b) {
return ((a.tv_sec < b.tv_sec) ||
((a.tv_sec == b.tv_sec) &&
(a.tv_usec < b.tv_usec)));
};
static inline struct timeval
Timeval_FromSecs(double secs)
{
struct timeval res;
res.tv_sec = (time_t)secs;
res.tv_usec = (time_t) (secs - (long long)secs) * 1000000;
return res;
}
#define FMT_TIMEVAL_ABS "%s"
#define XVA_TIMEVAL_ABS(t) Message_DFree(Timeval_FmtAbs(t))
static inline char *
Timeval_FmtAbs(struct timeval tv)
{
static const int LEN = 32;
char *buf = (char *)malloc(LEN);
if (!buf)
return NULL;
strftime(buf, LEN, "%H:%M:%S", localtime(&tv.tv_sec));
sprintf(buf + strlen(buf), ":%06ld", tv.tv_usec);
return buf;
}
#define FMT_TIMEVAL_DIFF "%ld.%06ld"
#define VA_TIMEVAL_DIFF(t) t.tv_sec, t.tv_usec
#endif