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astime.h

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/*
 *    Copyright (c) 1986-2000, Hiram Clawson 
 *    All rights reserved.
 *
 *    Redistribution and use in source and binary forms, with or
 *    without modification, are permitted provided that the following
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 *          following disclaimer.
 *
 *          Redistributions in binary form must reproduce the
 *          above copyright notice, this list of conditions and
 *          the following disclaimer in the documentation and/or
 *          other materials provided with the distribution.
 *
 *          Neither name of The Museum of Hiram nor the names of
 *          its contributors may be used to endorse or promote products
 *          derived from this software without specific prior
 *          written permission. 
 *
 *    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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 *    IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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 */

/**
 *    @file astime.h
 *      @brief contains definitions of structures used for time calculations.
 */

#ifndef     _astime_h_
#define _astime_h_

typedef struct ut_instant {
      double      j_date; /**< julian decimal date, 0 = 01 Jan 4713 BC 12 HR UT */
      long year;      /**< year, valid range [-4,713, +2,147,483,647] */
      int   month;      /**<  [1-12]      */
      int   day;  /**<  [1-31]      */
      int   i_hour;     /**<  [0-23]      */
      int   i_minute;   /**<  [0-59]      */
      int   i_second;   /**<  [0-59]      */
      double      d_hour;           /**< [0.0-23.9999] includes minute and second */
      double      d_minute;   /**<  [0.0-59.9999] includes second */
      double      d_second;   /**<  [0.0-59.9999]     */
      int   weekday;    /**<  [0-6] */
      int   day_of_year;      /**<  [1-366]     */
} UTinstant, * UTinstantPtr;

/*    Functions in caldate.c  */

long caldat( UTinstantPtr );  /** converts julian date to year,mo,da */
double juldat( UTinstantPtr );      /** returns julian day from year,mo,da */

#endif      /*    _astime_h_  */

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