ftime
Stores current time in timeb structure.
Defined in header <sys/timeb.h>
Syntax
#include <sys\timeb.h>
void ftime(struct timeb *buf)Portability
| DOS | UNIX | Windows | ANSI C | C++ only |
|---|---|---|---|---|
| ■ | ■ | ■ |
Remarks
On UNIX platforms, ftime is only available on System V systems.
ftime determines the current time and fills in the fields in the timeb structure pointed to by buf. The timeb structure contains four fields: time, millitm, timezone, and dstflag:
struct timeb { long time ; short millitm ; short timezone ;
short dstflag ; }; EI time provides the time in seconds since 00:00:00 Greenwich mean time
| (GMDJanuary H millitm is the fractional part of a second in milliseconds. □ timezone is the difference in minutes between GMT and the local time. | 1,1970. |
This value is computed going west from GMT. ftime gets this field from the global variable timezone, which is set by tzset. D dstflag is used to indicate whether daylight saving time will be taken into account during time calculations.
^^
ftime calls tzset. Therefore, it isn't necessary to call tzset explicitly when you use ftime.
Retum value
None.
See also
Example
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <sys\timeb.h>
/* pacific standard & daylight savings */
char *tzstr = "TZ=PST8PDT";
int main (void)
struct timeb t;
putenv(tzstr) ;
tzset 0;
ftime (&t);
printf ("Seconds since 1/1/1970 GMT: %ld\n", t.time);
printf ("Thousandths of a second: %d\n", t.millitm);
printf ("Difference between local time and GMT: %d\n", t.timezone) ;
printf ("Daylight savings in effect (1) not (0): %d\n", t.dstflag);
return 0;Differences from modern implementations
Nothing recorded yet.
Modern references
These are search links, not yet checked by hand.
Stable link: /3.1/sys/timeb.h/ftime/
· short form /3.1/ftime/