minix/include/time.h
2005-04-21 14:53:53 +00:00

73 lines
2.2 KiB
C
Executable file

/* The <time.h> header is used by the procedures that deal with time.
* Handling time is surprisingly complicated, what with GMT, local time
* and other factors. Although the Bishop of Ussher (1581-1656) once
* calculated that based on the Bible, the world began on 12 Oct. 4004 BC
* at 9 o'clock in the morning, in the UNIX world time begins at midnight,
* 1 Jan. 1970 GMT. Before that, all was NULL and (void).
*/
#ifndef _TIME_H
#define _TIME_H
#define CLOCKS_PER_SEC 60 /* MINIX always uses 60 Hz, even in Europe */
#ifdef _POSIX_SOURCE
#define CLK_TCK CLOCKS_PER_SEC /* obsolescent mame for CLOCKS_PER_SEC */
#endif
#define NULL ((void *)0)
#ifndef _SIZE_T
#define _SIZE_T
typedef unsigned int size_t;
#endif
#ifndef _TIME_T
#define _TIME_T
typedef long time_t; /* time in sec since 1 Jan 1970 0000 GMT */
#endif
#ifndef _CLOCK_T
#define _CLOCK_T
typedef long clock_t; /* time in ticks since process started */
#endif
struct tm {
int tm_sec; /* seconds after the minute [0, 59] */
int tm_min; /* minutes after the hour [0, 59] */
int tm_hour; /* hours since midnight [0, 23] */
int tm_mday; /* day of the month [1, 31] */
int tm_mon; /* months since January [0, 11] */
int tm_year; /* years since 1900 */
int tm_wday; /* days since Sunday [0, 6] */
int tm_yday; /* days since January 1 [0, 365] */
int tm_isdst; /* Daylight Saving Time flag */
};
extern char *tzname[];
/* Function Prototypes. */
#ifndef _ANSI_H
#include <ansi.h>
#endif
_PROTOTYPE( clock_t clock, (void) );
_PROTOTYPE( double difftime, (time_t _time1, time_t _time0) );
_PROTOTYPE( time_t mktime, (struct tm *_timeptr) );
_PROTOTYPE( time_t time, (time_t *_timeptr) );
_PROTOTYPE( char *asctime, (const struct tm *_timeptr) );
_PROTOTYPE( char *ctime, (const time_t *_timer) );
_PROTOTYPE( struct tm *gmtime, (const time_t *_timer) );
_PROTOTYPE( struct tm *localtime, (const time_t *_timer) );
_PROTOTYPE( size_t strftime, (char *_s, size_t _max, const char *_fmt,
const struct tm *_timep) );
#ifdef _POSIX_SOURCE
_PROTOTYPE( void tzset, (void) );
#endif
#ifdef _MINIX
_PROTOTYPE( int stime, (time_t *_top) );
#endif
#endif /* _TIME_H */