#ifndef UC_TIME_H_
#define UC_TIME_H_

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

/** Add two struct timeval.
 *
 * @param dst where to store the result
 * @param a first timeval to add
 * @param b second timeval to add
 * @return dst
 */
struct timeval *uc_tvadd(struct timeval *dst, const struct timeval *a, const struct timeval *b);

/** Subtract two struct timeval.
 *
 * @param dst where to store the result
 * @param a first timeval to subtract
 * @param b second timeval to subtract
 * @return dst
 */
struct timeval *uc_tvsub(struct timeval *dst, const struct timeval *a, const struct timeval *b);

/** Add two struct timevals.
 *
 * @param dst where to store the result
 * @param a first timeval to add
 * @param b second timeval to add
 * @return dst
 */
int uc_tvcmp(const struct timeval *a, const struct timeval *b);

/** Add two struct timespec.
 *
 * @param dst where to store the result
 * @param a first timespec to add
 * @param b second timespec to add
 * @return dst
 */

struct timespec *uc_tsadd(struct timespec *dst, const struct timespec *a, const struct timespec *b);


/** Subtract two struct timespec.
 *
 * @param dst where to store the result
 * @param a first timespec to subtract
 * @param b second timespec to subtract
 * @return dst
 */
struct timespec *uc_tssub(struct timespec *dst, const struct timespec *a, const struct timespec *b);

/** Add two struct timespec.
 *
 * @param a first timespec to add
 * @param b second timespec to add
 * @return < 0 if a is less than b, 0 if a and be are equal, > 0 if a is greater than b
 */
int uc_tscmp(const struct timespec *a, const struct timespec *b);

static inline uint64_t uc_tv2milisec(const struct timeval *t)
{
    return t->tv_sec * 1000 + t->tv_usec / 1000;
}

static inline uint64_t uc_ts2milisec(const struct timespec *t)
{
    return t->tv_sec * 1000 + t->tv_nsec / 10000000;
}

static inline uint64_t uc_ts2nanosec(const struct timespec *t)
{
    return t->tv_sec * 1000000000ULL + t->tv_nsec;
}


/** Convert number of miliseconds to a timeval.
 *
 * @param dst where to store the result
 * @param ms number of miliseconds
 * @return dst
 */
struct timeval *uc_ms2tv(struct timeval *dst, uint64_t ms);

#endif