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DateCalc.c  view on Meta::CPAN

#ifndef MODULE_DATE_CALC
#define MODULE_DATE_CALC
/*****************************************************************************/
/*  MODULE NAME:  DateCalc.c                            MODULE TYPE:  (lib)  */
/*****************************************************************************/
/*          Gregorian calendar date calculations in compliance with          */
/*          ISO/R 2015-1971, DIN 1355 and (to some extent) ISO 8601.         */
/*****************************************************************************/
/*  MODULE IMPORTS:                                                          */
/*****************************************************************************/
#include <stdio.h>                                  /*  MODULE TYPE:  (sys)  */
#include <stdlib.h>                                 /*  MODULE TYPE:  (sys)  */
#include <string.h>                                 /*  MODULE TYPE:  (sys)  */
#include <time.h>                                   /*  MODULE TYPE:  (sys)  */
#include "ToolBox.h"                                /*  MODULE TYPE:  (dat)  */
/*****************************************************************************/
/*  MODULE INTERFACE:                                                        */
/*****************************************************************************/

/* Make the VMS linker happy: */

#ifdef VMS
#define DateCalc_Day_of_Week_Abbreviation_ DateCalc_DoW_Abbrev_
#define DateCalc_nth_weekday_of_month_year DateCalc_nth_weekday
#endif

boolean
DateCalc_leap_year                     (Z_int   year);

boolean
DateCalc_check_date                    (Z_int   year,
                                        Z_int   month,
                                        Z_int   day);

boolean
DateCalc_check_time                    (Z_int   hour,
                                        Z_int   min,
                                        Z_int   sec);

boolean
DateCalc_check_business_date           (Z_int   year,
                                        Z_int   week,
                                        Z_int   dow);

Z_int
DateCalc_Day_of_Year                   (Z_int   year,
                                        Z_int   month,
                                        Z_int   day);

Z_long
DateCalc_Date_to_Days                  (Z_int   year,
                                        Z_int   month,
                                        Z_int   day);

Z_int
DateCalc_Day_of_Week                   (Z_int   year,
                                        Z_int   month,
                                        Z_int   day);

Z_int
DateCalc_Weeks_in_Year                 (Z_int   year);

Z_int
DateCalc_Week_Number                   (Z_int   year,
                                        Z_int   month,
                                        Z_int   day);