forked from KolibriOS/kolibrios
71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/*
|
|
* gmtime.c
|
|
* Original Author: G. Haley
|
|
*
|
|
* Converts the calendar time pointed to by tim_p into a broken-down time
|
|
* expressed as Greenwich Mean Time (GMT). Returns a pointer to a structure
|
|
* containing the broken-down time, or a null pointer if GMT is not
|
|
* available.
|
|
*/
|
|
|
|
/*
|
|
FUNCTION
|
|
<<gmtime>>---convert time to UTC traditional form
|
|
|
|
INDEX
|
|
gmtime
|
|
INDEX
|
|
gmtime_r
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <time.h>
|
|
struct tm *gmtime(const time_t *<[clock]>);
|
|
struct tm *gmtime_r(const time_t *<[clock]>, struct tm *<[res]>);
|
|
|
|
TRAD_SYNOPSIS
|
|
#include <time.h>
|
|
struct tm *gmtime(<[clock]>)
|
|
const time_t *<[clock]>;
|
|
struct tm *gmtime_r(<[clock]>, <[res]>)
|
|
const time_t *<[clock]>;
|
|
struct tm *<[res]>;
|
|
|
|
DESCRIPTION
|
|
<<gmtime>> takes the time at <[clock]> representing the number
|
|
of elapsed seconds since 00:00:00 on January 1, 1970, Universal
|
|
Coordinated Time (UTC, also known in some countries as GMT,
|
|
Greenwich Mean time) and converts it to a <<struct tm>>
|
|
representation.
|
|
|
|
<<gmtime>> constructs the traditional time representation in static
|
|
storage; each call to <<gmtime>> or <<localtime>> will overwrite the
|
|
information generated by previous calls to either function.
|
|
|
|
RETURNS
|
|
A pointer to the traditional time representation (<<struct tm>>).
|
|
|
|
PORTABILITY
|
|
ANSI C requires <<gmtime>>.
|
|
|
|
<<gmtime>> requires no supporting OS subroutines.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
|
|
#define _GMT_OFFSET 0
|
|
|
|
#ifndef _REENT_ONLY
|
|
|
|
struct tm *
|
|
_DEFUN (gmtime, (tim_p),
|
|
_CONST time_t * tim_p)
|
|
{
|
|
struct _reent *reent = _REENT;
|
|
|
|
_REENT_CHECK_TM(reent);
|
|
return gmtime_r (tim_p, (struct tm *)_REENT_TM(reent));
|
|
}
|
|
|
|
#endif
|