feat(c/time): restore native clock and calendar APIs

c/time/legacy_functions_other.go

@@ -0,0 +1,35 @@
+//go:build !windows && !((darwin && arm64 && !ios) || (linux && (amd64 || arm64) && !android))
+
+package time
+
+import (
+	"github.com/goplus/lib/c"
+	_ "unsafe"
+)
+
+//go:linkname Time C.time
+func Time(timer *TimeT) TimeT
+
+//go:linkname Mktime C.mktime
+func Mktime(timer *Tm) TimeT
+
+//go:linkname Difftime C.difftime
+func Difftime(end, start TimeT) float64
+
+//go:linkname Gmtime C.gmtime
+func Gmtime(timer *TimeT) *Tm
+
+//go:linkname Localtime C.localtime
+func Localtime(timer *TimeT) *Tm
+
+//go:linkname Clock C.clock
+func Clock() ClockT
+
+//go:linkname ClockGettime C.clock_gettime
+func ClockGettime(clkId ClockidT, tp *Timespec) c.Int
+
+//go:linkname ClockSettime C.clock_settime
+func ClockSettime(clkId ClockidT, tp *Timespec) c.Int
+
+//go:linkname ClockGetres C.clock_getres
+func ClockGetres(clkId ClockidT, res *Timespec) c.Int