leap.h

Go to the documentation of this file.

/* SPDX-License-Identifier: MIT */
#ifndef __LEAP_H__
#define __LEAP_H__
 
#include <stdbool.h>
 
#define LEAP_MCM 693961
 
bool is_leap(int year);
 
int leap_add(int year);
 
int leap_thru(int year);
 
int leap_day(int year);
 
struct leap_off {
  int year;
  int day;
};
 
static inline bool equal_leap_off(struct leap_off lhs, struct leap_off rhs) {
  return lhs.year == rhs.year && lhs.day == rhs.day;
}
 
struct leap_off leap_off(int year, int day_off);
 
int leap_mday(int year, int month);
 
int leap_yday(int year, int month);
 
struct leap_date {
  int year;
  int month;
  int day;
};
 
static inline bool equal_leap_date(struct leap_date lhs, struct leap_date rhs) {
  return lhs.year == rhs.year && lhs.month == rhs.month && lhs.day == rhs.day;
}
 
struct leap_date leap_date(int year, int day_off);
 
static inline struct leap_date leap_date_from_off(struct leap_off off) { return leap_date(off.year, off.day); }
 
struct leap_off leap_from(int year, int month, int day);
 
static inline struct leap_off leap_from_date(struct leap_date date) {
  return leap_from(date.year, date.month, date.day);
}
 
struct leap_date leap_abs_date(int day_off);
 
int leap_abs_from(int year, int month, int day);
 
static inline int leap_abs_from_date(struct leap_date date) { return leap_abs_from(date.year, date.month, date.day); }
 
#endif /* __LEAP_H__ */