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Versions: 16
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Stored size: 1.86 KB
Contents
// +build darwin ios
package keychain
/*
#cgo LDFLAGS: -framework CoreFoundation
#include <CoreFoundation/CoreFoundation.h>
*/
import "C"
import (
"math"
"time"
)
const nsPerSec = 1000 * 1000 * 1000
// absoluteTimeIntervalSince1970() returns the number of seconds from
// the Unix epoch (1970-01-01T00:00:00+00:00) to the Core Foundation
// absolute reference date (2001-01-01T00:00:00+00:00). It should be
// exactly 978307200.
func absoluteTimeIntervalSince1970() int64 {
return int64(C.kCFAbsoluteTimeIntervalSince1970)
}
func unixToAbsoluteTime(s int64, ns int64) C.CFAbsoluteTime {
// Subtract as int64s first before converting to floating
// point to minimize precision loss (assuming the given time
// isn't much earlier than the Core Foundation absolute
// reference date).
abs := s - absoluteTimeIntervalSince1970()
return C.CFAbsoluteTime(abs) + C.CFTimeInterval(ns)/nsPerSec
}
func absoluteTimeToUnix(abs C.CFAbsoluteTime) (int64, int64) {
int, frac := math.Modf(float64(abs))
return int64(int) + absoluteTimeIntervalSince1970(), int64(frac * nsPerSec)
}
// TimeToCFDate will convert the given time.Time to a CFDateRef, which
// must be released with Release(ref).
func TimeToCFDate(t time.Time) C.CFDateRef {
s := t.Unix()
ns := int64(t.Nanosecond())
abs := unixToAbsoluteTime(s, ns)
return C.CFDateCreate(C.kCFAllocatorDefault, abs)
}
// CFDateToTime will convert the given CFDateRef to a time.Time.
func CFDateToTime(d C.CFDateRef) time.Time {
abs := C.CFDateGetAbsoluteTime(d)
s, ns := absoluteTimeToUnix(abs)
return time.Unix(s, ns)
}
// Wrappers around C functions for testing.
func cfDateToAbsoluteTime(d C.CFDateRef) C.CFAbsoluteTime {
return C.CFDateGetAbsoluteTime(d)
}
func absoluteTimeToCFDate(abs C.CFAbsoluteTime) C.CFDateRef {
return C.CFDateCreate(C.kCFAllocatorDefault, abs)
}
func releaseCFDate(d C.CFDateRef) {
Release(C.CFTypeRef(d))
}
Version data entries
16 entries across 16 versions & 1 rubygems