package internal

import (
	"time"

	"lukeshu.com/btrfs-tools/pkg/binstruct"
)

type Generation uint64

type Key struct {
	ObjectID      ObjID    `bin:"off=0x0, siz=0x8"` // Each tree has its own set of Object IDs.
	ItemType      ItemType `bin:"off=0x8, siz=0x1"`
	Offset        uint64   `bin:"off=0x9, siz=0x8"` // The meaning depends on the item type.
	binstruct.End `bin:"off=0x11"`
}

type Time struct {
	Sec           int64  `bin:"off=0x0, siz=0x8"` // Number of seconds since 1970-01-01T00:00:00Z.
	NSec          uint32 `bin:"off=0x8, siz=0x4"` // Number of nanoseconds since the beginning of the second.
	binstruct.End `bin:"off=0xc"`
}

func (t Time) ToStd() time.Time {
	return time.Unix(t.Sec, int64(t.NSec))
}