/* $Id$ */

/*
 *   Copyright (c) 2001-2010 Aaron Turner <aturner at synfin dot net>
 *   Copyright (c) 2013-2018 Fred Klassen <tcpreplay at appneta dot com> - AppNeta
 *
 *   The Tcpreplay Suite of tools 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 with the authors permission any later version.
 *
 *   The Tcpreplay Suite 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 the Tcpreplay Suite.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _TIMER_H_
#define _TIMER_H_

#include "config.h"
#include "defines.h"
#include "tcpreplay.h"
#include "common.h"

#include <time.h>
#include <sys/time.h>
#include <math.h>


/*
 * 1 sec = 1,0000 millisec (ms)
 * 1 sec = 1,000,000 microsec (us)
 * 1 sec = 1,000,000,000 nanosec (ns)
 * 1 millisec = 1,000 microsec
 * 1 microsec = 1,000 nanosec
 */

void timerdiv_float(struct timeval *tvp, float div);
void timesdiv_float(struct timespec *tvs, float div);
void timerdiv(struct timeval *tvp, COUNTER div);
void timesdiv(struct timespec *tvs, COUNTER div);

/* convert float time to struct timeval *tvp */
#ifndef float2timer
#define float2timer(time, tvp)                            \
    do {                                                  \
        (tvp)->tv_sec = time;                             \
        (tvp)->tv_usec = (time - (tvp)->tv_sec) * 100000; \
    } while (0)
#endif

/* timesec to float */
#ifndef timer2float
#define timer2float(tvp, time)                           \
    do {                                                 \
        time = (tvp)->tv_sec;                            \
        time += (float)((tvp)->tv_usec / 10000) * 0.01;  \
    } while (0)
#endif

#ifndef TIMEVAL_TO_TIMESPEC
#define TIMEVAL_TO_TIMESPEC(tv, ts) {                 \
            (ts)->tv_sec = (tv)->tv_sec;              \
            (ts)->tv_nsec = (tv)->tv_usec * 1000; }
#endif

#ifndef TIMESPEC_TO_TIMEVAL
#define TIMESPEC_TO_TIMEVAL(tv, ts) {           \
    (tv)->tv_sec = (ts)->tv_sec;                \
    (tv)->tv_usec = (ts)->tv_nsec / 1000; }
#endif

#ifndef ROUND_TIMESPEC_TO_MICROSEC
#define ROUND_TIMESPEC_TO_MICROSEC(ts)      \
    do {                                    \
        (ts)->tv_nsec = ((((ts)->tv_nsec / 1000) + ((ts)->tv_nsec % 1000 >= 500 ? 1 : 0)) * 1000);   \
    } while (0)
#endif



/* zero out a timer */
#ifndef timerclear
#define timerclear(tvp)     (tvp)->tv_sec = (tvp)->tv_usec = 0
#endif

/* zero out a timespec */
#ifndef timesclear
#define timesclear(tvs)     (tvs)->tv_sec = (tvs)->tv_nsec = 0
#endif

/* is timer non-zero? */
#ifndef timerisset
#define timerisset(tvp)     ((tvp)->tv_sec || (tvp)->tv_usec)
#endif

/* is timespec non-zero? */
#ifndef timesisset
#define timesisset(tvs)     ((tvs)->tv_sec || (tvs)->tv_nsec)
#endif


/* add tvp and uvp and store in vvp */
#ifndef timeradd
#define timeradd(tvp, uvp, vvp)                             \
    do {                                                    \
        (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;      \
        (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;   \
        if ((vvp)->tv_usec >= 1000000) {                    \
            (vvp)->tv_sec++;                                \
            (vvp)->tv_usec -= 1000000;                      \
        }                                                   \
    } while (0)
#endif

/* subtract uvp from tvp and store in vvp */
#ifndef timersub
#define  timersub(tvp, uvp, vvp)                             \
    do {                                                    \
        (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;      \
        (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;   \
        if ((vvp)->tv_usec < 0) {                           \
            (vvp)->tv_sec--;                                \
            (vvp)->tv_usec += 1000000;                      \
        }                                                   \
    } while (0)
#endif

#ifndef timessub
#define  timessub(tsp, usp, vsp)                            \
    do {                                                   \
        (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;     \
        (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;  \
        if ((vsp)->tv_nsec < 0) {                          \
            (vsp)->tv_sec--;                               \
            (vsp)->tv_nsec += 1000000000;                  \
        }                                                  \
    } while (0)
#endif

/* compare tvp and uvp using cmp */
#ifndef timercmp
#define timercmp(tvp, uvp, cmp)            \
    (((tvp)->tv_sec == (uvp)->tv_sec) ?    \
     ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
     ((tvp)->tv_sec cmp (uvp)->tv_sec))
#endif

#ifndef timescmp
#define timescmp(tsp, usp, cmp)              \
    (((tsp)->tv_sec == (usp)->tv_sec) ?      \
     ((tsp)->tv_nsec cmp (usp)->tv_nsec) :   \
     ((tsp)->tv_sec cmp (usp)->tv_sec))
#endif

/* multiply tvp by x and store in uvp */
#define timermul(tvp, uvp, x)                   \
    do {                                        \
        (uvp)->tv_sec = (tvp)->tv_sec * x;      \
        (uvp)->tv_usec = (tvp)->tv_usec * x;    \
        while((uvp)->tv_usec > 1000000) {       \
            (uvp)->tv_sec++;                    \
            (uvp)->tv_usec -= 1000000;          \
        }                                       \
    } while(0)

    typedef struct timeval timestamp_t;

void init_timestamp(timestamp_t *ctx);


#endif /* _TIMER_H_ */