Commit 55cfe8ef authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont

NTPtime64() returns an NTP timestamp

parent 3d33b851
......@@ -86,3 +86,4 @@ VLC_EXPORT( void, date_Set, ( date_t *, mtime_t ) );
VLC_EXPORT( mtime_t, date_Get, ( const date_t * ) );
VLC_EXPORT( void, date_Move, ( date_t *, mtime_t ) );
VLC_EXPORT( mtime_t, date_Increment, ( date_t *, uint32_t ) );
VLC_EXPORT( uint64_t, NTPtime64, ( void ) );
......@@ -3,6 +3,7 @@
* Functions are prototyped in vlc_mtime.h.
*****************************************************************************
* Copyright (C) 1998-2004 the VideoLAN team
* Copyright © 2006-2007 Rémi Denis-Courmont
* $Id$
*
* Authors: Vincent Seguin <seguin@via.ecp.fr>
......@@ -32,6 +33,7 @@
#include <stdio.h> /* sprintf() */
#include <time.h> /* clock_gettime(), clock_nanosleep() */
#include <stdlib.h> /* lldiv() */
#include <assert.h>
#if defined( PTH_INIT_IN_PTH_H ) /* GNU Pth */
......@@ -386,3 +388,34 @@ mtime_t date_Increment( date_t *p_date, uint32_t i_nb_samples )
return p_date->date;
}
/**
* @return NTP 64-bits timestamp in host byte order.
*/
uint64_t NTPtime64 (void)
{
struct timespec ts;
#if defined (CLOCK_REALTIME)
clock_gettime (CLOCK_REALTIME, &ts);
#else
{
struct timeval tv;
gettimeofday (&tv, NULL);
ts.tv_sec = tv.tv_sec;
ts.tv_nsec = tv.tv_usec * 1000;
}
#endif
/* Convert nanoseconds to 32-bits fraction (232 picosecond units) */
uint64_t t = (uint64_t)(ts.tv_nsec) << 32;
t /= 1000000000;
/* There is 70 years (incl. 17 leap ones) offset to the Unix Epoch.
* No leap seconds during that period since they were not invented yet.
*/
assert (t < 0x100000000);
t |= ((70LL * 365 + 17) * 24 * 60 * 60 + ts.tv_sec) << 32;
return t;
}
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