MNRTPtime.h

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/* Copyright (C) 2000 KOM/Darmstadt University of Technology
 *
 * You are allowed to use all other parts of the code under the following terms:
 *
 * For non-commercial use, code may be used in unmodified form provided
 * that this copyright notice and this permission notice appear in
 * supporting documentation.
 *
 * This software is provided "as is" and without any express or implied
 * warranties, including, without limitation, the implied warranty of
 * fitness for a particular purpose.
 *
 * The code may be subjected to the GNU General Public License, Version 2,
 * and re-distributed under the terms of this license.
 * As a special exception, permission is granted to link this code
 * with the Qt library and distribute executables, as long as you
 * follow the requirements of the GNU GPL in regard to all of the
 * software in the executable aside from Qt.
 *
 * Commercial use other than under the terms of the GNU General Public
 * License is allowed only after express negotiation of conditions
 * with the authors.
 */
#ifndef MNRTP_TIME_H
#define MNRTP_TIME_H

#include <assert.h>
#include <sys/time.h>
#include <stdio.h>

#include "var_type.h"

/* time functions */

#define LOWER_MASK 65535
#define DELTA_DIFF 65535
/* offset between 1.jan 1900 and 1.jan 1970 */
#define GETTIMEOFDAY_TO_NTP_OFFSET 0x83AA7E80   

struct ntp64
{
    u_int32 upper;
    u_int32 lower;

    ntp64() {
        upper = 0;
        lower = 0;
    }

    inline ntp64& operator= ( const ntp64& orig ) {
        upper = orig.upper;
        lower = orig.lower;
        return *this;
    }
};

inline u_int32 get_upper_16bits(u_int32 x)
{
  return ((x >> 16) & LOWER_MASK);
}

inline u_int32 get_lower_16bits(u_int32 x)
{
  return (x & LOWER_MASK);
}

/* get the lower 16 of x and the upper 16 of y */
inline u_int32 get_middle_32bits(u_int32 x, u_int32 y)
{
   return ((get_lower_16bits(x) << 16 ) | (get_upper_16bits(y)));
}

extern ntp64 getntptime();

extern u_int32 time2ts(const ntp64& time, const ntp64& time_first, u_int32 freq);

#endif

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