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#ifndef _LINUX_TIME_H

#define _LINUX_TIME_H

#include <asm/param.h>

#include <linux/types.h>

#ifndef _STRUCT_TIMESPEC

#define _STRUCT_TIMESPEC

struct timespec {

        time_t  tv_sec;         /* seconds */

        long    tv_nsec;        /* nanoseconds */

};

#endif /* _STRUCT_TIMESPEC */

#ifdef __KERNEL__

/*

 * Change timeval to jiffies, trying to avoid the

 * most obvious overflows..

 *

 * And some not so obvious.

 *

 * Note that we don't want to return MAX_LONG, because

 * for various timeout reasons we often end up having

 * to wait "jiffies+1" in order to guarantee that we wait

 * at _least_ "jiffies" - so "jiffies+1" had better still

 * be positive.

 */

#define MAX_JIFFY_OFFSET ((~0UL >> 1)-1)

static __inline__ unsigned long

timespec_to_jiffies(struct timespec *value)

{

        unsigned long sec = value->tv_sec;

        long nsec = value->tv_nsec;

        if (sec >= (MAX_JIFFY_OFFSET / HZ))

                return MAX_JIFFY_OFFSET;

        nsec += 1000000000L / HZ - 1;

        nsec /= 1000000000L / HZ;

        return HZ * sec + nsec;

}

static __inline__ void

jiffies_to_timespec(unsigned long jiffies, struct timespec *value)

{

        value->tv_nsec = (jiffies % HZ) * (1000000000L / HZ);

        value->tv_sec = jiffies / HZ;

}

/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.

 * Assumes input in normal date format, i.e. 1980-12-31 23:59:59

 * => year=1980, mon=12, day=31, hour=23, min=59, sec=59.

 *

 * [For the Julian calendar (which was used in Russia before 1917,

 * Britain & colonies before 1752, anywhere else before 1582,

 * and is still in use by some communities) leave out the

 * -year/100+year/400 terms, and add 10.]

 *

 * This algorithm was first published by Gauss (I think).

 *

 * WARNING: this function will overflow on 2106-02-07 06:28:16 on

 * machines were long is 32-bit! (However, as time_t is signed, we

 * will already get problems at other places on 2038-01-19 03:14:08)

 */

static inline unsigned long

mktime (unsigned int year, unsigned int mon,

        unsigned int day, unsigned int hour,

        unsigned int min, unsigned int sec)

{

        if (0 >= (int) (mon -= 2)) {     /* 1..12 -> 11,12,1..10 */

                mon += 12;              /* Puts Feb last since it has leap day */

                year -= 1;

        }

        return (((

                (unsigned long) (year/4 - year/100 + year/400 + 367*mon/12 + day) +

                        year*365 - 719499

            )*24 + hour /* now have hours */

          )*60 + min /* now have minutes */

        )*60 + sec; /* finally seconds */

}

#endif /* __KERNEL__ */

struct timeval {

        time_t          tv_sec;         /* seconds */

        suseconds_t     tv_usec;        /* microseconds */

};

struct timezone {

        int     tz_minuteswest; /* minutes west of Greenwich */

        int     tz_dsttime;     /* type of dst correction */

};

#define NFDBITS                 __NFDBITS

#ifdef __KERNEL__

extern void do_gettimeofday(struct timeval *tv);

extern void do_settimeofday(struct timeval *tv);

#endif

#define FD_SETSIZE              __FD_SETSIZE

#define FD_SET(fd,fdsetp)       __FD_SET(fd,fdsetp)

#define FD_CLR(fd,fdsetp)       __FD_CLR(fd,fdsetp)

#define FD_ISSET(fd,fdsetp)     __FD_ISSET(fd,fdsetp)

#define FD_ZERO(fdsetp)         __FD_ZERO(fdsetp)

/*

 * Names of the interval timers, and structure

 * defining a timer setting.

 */

#define ITIMER_REAL     0

#define ITIMER_VIRTUAL  1

#define ITIMER_PROF     2

struct  itimerspec {

        struct  timespec it_interval;    /* timer period */

        struct  timespec it_value;       /* timer expiration */

};

struct  itimerval {

        struct  timeval it_interval;    /* timer interval */

        struct  timeval it_value;       /* current value */

};

#endif