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