You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
2.5 KiB
70 lines
2.5 KiB
/*****************************************************************************
|
|
* datetime.h: ETSI EN 300 468 Date and time functions
|
|
*****************************************************************************
|
|
* Copyright (C) 2009-2010 VideoLAN
|
|
*
|
|
* Authors: Christophe Massiot <massiot@via.ecp.fr>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject
|
|
* to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
|
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
|
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
|
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*****************************************************************************/
|
|
|
|
#include <bitstream/common.h>
|
|
|
|
/*
|
|
* Normative references:
|
|
* - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems)
|
|
*/
|
|
|
|
#ifndef __BITSTREAM_DVB_DATETIME_H__
|
|
#define __BITSTREAM_DVB_DATETIME_H__
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
/*****************************************************************************
|
|
* DVB Date and time functions
|
|
*****************************************************************************/
|
|
|
|
/* EN 300 468 Annex C, year is from 1900 */
|
|
static inline uint16_t dvb_mjd_set(int y, int m, int d)
|
|
{
|
|
int l = (m == 1 || m == 2) ? 1 : 0;
|
|
int mjd = 14956 + d + (y - l) * 1461 / 4 + (m + 1 + l * 12) * 306001 / 10000;
|
|
return (uint16_t)mjd;
|
|
}
|
|
|
|
static inline void dvb_mjd_get(uint16_t mjd, int *y, int *m, int *d)
|
|
{
|
|
int k;
|
|
int yp = (mjd * 20 - 301564) / 7305;
|
|
int mp = (mjd * 10000 - 149561000 - yp * 3652500) / 306001;
|
|
*d = mjd - 14956 - yp * 1461 / 4 - mp * 306001 / 10000;
|
|
k = (mp == 14 || mp == 15) ? 1 : 0;
|
|
*y = yp + k;
|
|
*m = mp - 1 - k * 12;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|