_ftime_s, _ftime32_s, _ftime64_s
Gets the current time. These are versions of _ftime, _ftime32, _ftime64 with security enhancements as described in Security Enhancements in the CRT.
errno_t _ftime_s( struct _timeb *timeptr ); errno_t _ftime32_s( struct __timeb32 *timeptr ); errno_t _ftime64_s( struct __timeb64 *timeptr );
Parameters
- timeptr
-
Pointer to a _timeb, __timeb32, or __timeb64 structure.
The _ftime_s function gets the current local time and stores it in the structure pointed to by timeptr. The _timeb, __timeb32, and __timeb64 structures are defined in SYS\Timeb.h. They contain four fields, which are listed in the following table.
- dstflag
-
Nonzero if daylight savings time is currently in effect for the local time zone. (See _tzset for an explanation of how daylight savings time is determined.)
- millitm
-
Fraction of a second in milliseconds.
- time
-
Time in seconds since midnight (00:00:00), January 1, 1970, coordinated universal time (UTC).
- timezone
-
Difference in minutes, moving westward, between UTC and local time. The value of timezone is set from the value of the global variable _timezone (see _tzset).
_ftime64_s, which uses the __timeb64 structure, allows file-creation dates to be expressed up through 23:59:59, December 31, 3000, UTC; whereas _ftime32_s only represents dates through 03:14:07 January 19, 2038, UTC. Midnight, January 1, 1970, is the lower bound of the date range for all these functions.
In Visual C++ 2005, _ftime_s is equivalent to _ftime64_s and _timeb contains a 64-bit time. This is true unless _USE_32BIT_TIME_T is defined, in which case the old behavior is in effect; _ftime_s uses a 32-bit time and _timeb contains a 32-bit time.
_ftime_s validates its parameters. If passed a null pointer as timeptr, the function invokes the invalid parameter handler, as described in Parameter Validation. If execution is allowed to continue, the function sets errno to EINVAL.
| Function | Required header | Compatibility |
|---|---|---|
| _ftime_s | <sys/types.h> and <sys/timeb.h> | Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 |
| _ftime32_s | <sys/types.h> and <sys/timeb.h> | Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 |
| _ftime64_s | <sys/types.h> and <sys/timeb.h> | Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 |
For more compatibility information, see Compatibility in the Introduction.
Libraries
All versions of the C run-time libraries.
// crt_ftime64_s.c
// This program uses _ftime64_s to obtain the current
// time and then stores this time in timebuffer.
#include <stdio.h>
#include <sys/timeb.h>
#include <time.h>
int main( void )
{
struct _timeb timebuffer;
char timeline[26];
errno_t err;
time_t time1;
unsigned short millitm1;
short timezone1;
short dstflag1;
_ftime64_s( &timebuffer );
time1 = timebuffer.time;
millitm1 = timebuffer.millitm;
timezone1 = timebuffer.timezone;
dstflag1 = timebuffer.dstflag;
printf( "Seconds since midnight, January 1, 1970 (UTC): %I64d\n",
time1);
printf( "Milliseconds: %d\n", millitm1);
printf( "Minutes between UTC and local time: %d\n", timezone1);
printf( "Daylight savings time flag (1 means Daylight time is in "
"effect): %d\n", dstflag1);
err = ctime_s( timeline, 26, & ( timebuffer.time ) );
if (err)
{
printf("Invalid argument to ctime_s. ");
}
printf( "The time is %.19s.%hu %s", timeline, timebuffer.millitm,
&timeline[20] );
}
Sample Output
Seconds since midnight, January 1, 1970 (UTC): 1051553334 Milliseconds: 230 Minutes between UTC and local time: 480 Daylight savings time flag (1 means Daylight time is in effect): 1 The time is Mon Apr 28 11:08:54.230 2003
