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added isc_time_seconds, isc_time_nanoseconds

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fixed isc_time_settoepoch and isc_time_isepoch
This commit is contained in:
David Lawrence
2000-03-10 17:50:36 +00:00
parent 114d0d1642
commit 11d732daac
2 changed files with 67 additions and 4 deletions
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26
lib/isc/win32/include/isc/time.h
View File

@@ -193,6 +193,30 @@ isc_time_microdiff(isc_time_t *t1, isc_time_t *t2);
* No formal requirements are asserted. * No formal requirements are asserted.
*/ */
ISC_LANG_ENDDECLS isc_uint32_t
isc_time_seconds(isc_time_t *t);
/*
* Return the number of seconds since the epoch stored in a time structure.
*
* Requires:
* No formal requirements are asserted.
*/
isc_uint32_t
isc_time_nanoseconds(isc_time_t *t);
/*
* Return the number of nanoseconds stored in a time structure.
*
* Notes:
* This is the number of nanoseconds in excess of the the number
* of seconds since the epoch; it will always be less than one
* full second.
*
* Requires:
* No formal requirements are asserted.
*
* Ensures:
* The returned value is less than 1*10^9.
*/
#endif /* ISC_TIME_H */ #endif /* ISC_TIME_H */

45
lib/isc/win32/time.c
View File

@@ -28,6 +28,16 @@
#include <isc/assertions.h> #include <isc/assertions.h>
#include <isc/time.h> #include <isc/time.h>
/*
* struct FILETIME uses "100-nanoseconds intevals".
* NS / S = 1000000000 (10^9).
* While it is reasonably obvious that this makes the needed
* conversion factor 10^7, it is coded this way for additional clarity.
*/
#define NS_PER_S 1000000000
#define NS_INTERVAL 100
#define INTERVALS_PER_S (NS_PER_S / NS_INTERVAL)
/*** /***
*** Intervals *** Intervals
***/ ***/
@@ -48,7 +58,8 @@ isc_interval_set(isc_interval_t *i,
REQUIRE(i != NULL); REQUIRE(i != NULL);
REQUIRE(nanoseconds < 1000000000); REQUIRE(nanoseconds < 1000000000);
i->interval = (LONGLONG)seconds * 10000000 + nanoseconds / 100; i->interval = (LONGLONG)seconds * INTERVALS_PER_S
+ nanoseconds / NS_INTERVAL;
} }
isc_boolean_t isc_boolean_t
@@ -81,7 +92,8 @@ isc_time_settoepoch(isc_time_t *t) {
REQUIRE(t != NULL); REQUIRE(t != NULL);
t->absolute = epoch; t->absolute.dwLowDateTime = 0;
t->absolute.dwHighDateTime = 0;
} }
isc_boolean_t isc_boolean_t
@@ -92,7 +104,8 @@ isc_time_isepoch(isc_time_t *t) {
REQUIRE(t != NULL); REQUIRE(t != NULL);
if (CompareFileTime(&t->absolute, &epoch) == 0) if (t->absolute.dwLowDateTime == 0 &&
t->absolute.dwHighDateTime == 0)
return (ISC_TRUE); return (ISC_TRUE);
return (ISC_FALSE); return (ISC_FALSE);
@@ -207,3 +220,29 @@ isc_time_microdiff(isc_time_t *t1, isc_time_t *t2) {
return (i3); return (i3);
} }
isc_uint32_t
isc_time_seconds(isc_time_t *t) {
ULARGE_INTEGER i;
i.LowPart = t->absolute.dwLowDateTime;
i.HighPart = t->absolute.dwHighDateTime;
INSIST(i.QuadPart / INTERVALS_PER_S <= (isc_uint32_t)-1);
return ((isc_uint32_t)(i.QuadPart / INTERVALS_PER_S));
}
isc_uint32_t
isc_time_nanoseconds(isc_time_t *t) {
ULARGE_INTEGER i;
i.LowPart = t->absolute.dwLowDateTime;
i.HighPart = t->absolute.dwHighDateTime;
i.QuadPart -= isc_time_seconds(t);
ENSURE(i.QuadPart * NS_INTERVAL < NS);
return ((isc_uint32_t)(i.QuadPart * NS_INTERVAL));
}