loc_time.h

操作系统源代码

/*
 * loc_time.h - some local definitions
 */
/* $Header: loc_time.h,v 1.1 91/04/22 13:19:51 ceriel Exp $ */

#define	YEAR0		1900			/* the first year */
#define	EPOCH_YR	1970		/* EPOCH = Jan 1 1970 00:00:00 */
#define	SECS_DAY	(24L * 60L * 60L)
#define	LEAPYEAR(year)	(!((year) % 4) && (((year) % 100) || !((year) % 400)))
#define	YEARSIZE(year)	(LEAPYEAR(year) ? 366 : 365)
#define	FIRSTSUNDAY(timp)	(((timp)->tm_yday - (timp)->tm_wday + 420) % 7)
#define	FIRSTDAYOF(timp)	(((timp)->tm_wday - (timp)->tm_yday + 420) % 7)
#define	TIME_MAX	ULONG_MAX
#define	ABB_LEN		3

extern const int _ytab[2][12];
extern const char *_days[];
extern const char *_months[];

void _tzset(void);
unsigned _dstget(struct tm *timep);

extern long _timezone;
extern long _dst_off;
extern int _daylight;
extern char *_tzname[2];