/* Copyright(c) 1994  Danny Sadinoff
  See section COPYING for conditions for redistribution
*/
#ifndef __GREG__
#define __GREG__

#include "proto.h"

#define LEAP(x) (!((x) % 4) && ( ((x) % 100) || !((x) % 400)))
#define DAYS_IN(x) (LEAP((x))?366:365)

#define JAN 1
#define FEB 2
#define MAR 3
#define APR 4
#define MAY 5
#define JUN 6
#define JUL 7
#define AUG 8
#define SEP 9
#define OCT 10
#define NOV 11
#define DEC 12

#define SUN 0
#define MON 1
#define TUE 2
#define WED 3
#define THU 4
#define FRI 5
#define SAT 6

extern char * eMonths[];
extern int MonthLengths[][13] ;
extern char * DayNames[] ;
extern char * ShortDayNames[];

typedef struct dateStruct {
  int mm;	/* months: jan=1, DEC = 12 */
  int dd;	/* day of month 1,31 */
  int yy;	/* years since year 1 BCE i.e. -1 = 2 BCE */
  } date_t;

int dayOfYear PROTO((date_t));
long greg2abs PROTO((date_t));
date_t abs2greg PROTO((long));
void decDate PROTO((date_t *, long));
void incDate PROTO((date_t *, long));
int dayOfWeek PROTO((date_t));
void setDate PROTO((date_t *));
long day_on_or_before PROTO((int,long));
#endif