125 lines
4.1 KiB
C
125 lines
4.1 KiB
C
/****************************************************************************
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* include/nuttx/time.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_TIME_H
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#define __INCLUDE_NUTTX_TIME_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdbool.h>
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#include <time.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* If Gregorian time is not supported, then neither is Julian */
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#ifndef CONFIG_GREGORIAN_TIME
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# undef CONFIG_JULIAN_TIME
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#else
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# define JD_OF_EPOCH 2440588 /* Julian Date of noon, J1970 */
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# ifdef CONFIG_JULIAN_TIME
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# define GREG_DUTC -141427 /* Default is October 15, 1582 */
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# define GREG_YEAR 1582
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# define GREG_MONTH 10
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# define GREG_DAY 15
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# endif /* CONFIG_JULIAN_TIME */
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#endif /* !CONFIG_GREGORIAN_TIME */
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: clock_isleapyear
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*
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* Description:
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* Return true if the specified year is a leap year
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*
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****************************************************************************/
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int clock_isleapyear(int year);
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/****************************************************************************
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* Name: clock_daysbeforemonth
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*
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* Description:
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* Get the number of days that occurred before the beginning of the month.
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*
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****************************************************************************/
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int clock_daysbeforemonth(int month, bool leapyear);
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/****************************************************************************
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* Name: clock_dayoftheweek
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*
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* Description:
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* Get the day of the week
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*
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* Input Parameters:
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* mday - The day of the month 1 - 31
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* month - The month of the year 1 - 12
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* year - the year including the 1900
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*
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* Returned Value:
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* Zero based day of the week 0-6, 0 = Sunday, 1 = Monday... 6 = Saturday
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*
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****************************************************************************/
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int clock_dayoftheweek(int mday, int month, int year);
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/****************************************************************************
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* Name: clock_calendar2utc
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*
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* Description:
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* Calendar/UTC conversion based on algorithms from p. 604
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* of Seidelman, P. K. 1992. Explanatory Supplement to
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* the Astronomical Almanac. University Science Books,
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* Mill Valley.
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*
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****************************************************************************/
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time_t clock_calendar2utc(int year, int month, int day);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCLUDE_NUTTX_TIME_H */
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