/*
* This file is part of DisOrder.
* Copyright (C) 2007, 2008 Richard Kettlewell
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
/** @file lib/timeval.h
* @brief Arithmetic on timeval structures
*/
#ifndef TIMEVAL_H
#define TIMEVAL_H
#include
static inline struct timeval tvsub(const struct timeval a,
const struct timeval b) {
struct timeval r;
r.tv_sec = a.tv_sec - b.tv_sec;
r.tv_usec = a.tv_usec - b.tv_usec;
if(r.tv_usec < 0) {
r.tv_usec += 1000000;
r.tv_sec--;
}
if(r.tv_usec > 999999) {
r.tv_usec -= 1000000;
r.tv_sec++;
}
return r;
}
static inline struct timeval tvadd(const struct timeval a,
const struct timeval b) {
struct timeval r;
r.tv_sec = a.tv_sec + b.tv_sec;
r.tv_usec = a.tv_usec + b.tv_usec;
if(r.tv_usec < 0) {
r.tv_usec += 1000000;
r.tv_sec--;
}
if(r.tv_usec > 999999) {
r.tv_usec -= 1000000;
r.tv_sec++;
}
return r;
}
static inline double tvdouble(const struct timeval a) {
return a.tv_sec + a.tv_usec / 1000000.0;
}
static inline int64_t tvsub_us(const struct timeval a,
const struct timeval b) {
return (((uint64_t)a.tv_sec * 1000000 + a.tv_usec)
- ((uint64_t)b.tv_sec * 1000000 + b.tv_usec));
}
/** @brief Great-than comparison for timevals */
static inline int tvgt(const struct timeval *a, const struct timeval *b) {
if(a->tv_sec > b->tv_sec)
return 1;
if(a->tv_sec == b->tv_sec
&& a->tv_usec > b->tv_usec)
return 1;
return 0;
}
/** @brief Less-than
comparison for timevals */
static inline int tvlt(const struct timeval *a, const struct timeval *b) {
if(a->tv_sec < b->tv_sec)
return 1;
if(a->tv_sec == b->tv_sec
&& a->tv_usec < b->tv_usec)
return 1;
return 0;
}
/** @brief Greater-than-or-equal comparison for timevals */
static inline int tvge(const struct timeval *a, const struct timeval *b) {
return !tvlt(a, b);
}
/** @brief Less-than-or-equal comparison for timevals */
static inline int tvle(const struct timeval *a, const struct timeval *b) {
return !tvgt(a, b);
}
#endif /* TIMEVAL_H */
/*
Local Variables:
c-basic-offset:2
comment-column:40
fill-column:79
indent-tabs-mode:nil
End:
*/