From e2cdb05eac6726c59fe1831876fddd8037156d67 Mon Sep 17 00:00:00 2001 From: Luke Shumaker Date: Sun, 28 Aug 2022 17:55:36 -0600 Subject: btrfs: Split off btrfstree and btrfsprim sub-packages --- lib/btrfs/btrfsprim/misc.go | 48 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 lib/btrfs/btrfsprim/misc.go (limited to 'lib/btrfs/btrfsprim/misc.go') diff --git a/lib/btrfs/btrfsprim/misc.go b/lib/btrfs/btrfsprim/misc.go new file mode 100644 index 0000000..0ebbe19 --- /dev/null +++ b/lib/btrfs/btrfsprim/misc.go @@ -0,0 +1,48 @@ +// Copyright (C) 2022 Luke Shumaker +// +// SPDX-License-Identifier: GPL-2.0-or-later + +package btrfsprim + +import ( + "fmt" + "time" + + "git.lukeshu.com/btrfs-progs-ng/lib/binstruct" + "git.lukeshu.com/btrfs-progs-ng/lib/containers" +) + +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"` +} + +func (k Key) String() string { + return fmt.Sprintf("{%v %v %v}", k.ObjectID, k.ItemType, k.Offset) +} + +func (a Key) Cmp(b Key) int { + if d := containers.NativeCmp(a.ObjectID, b.ObjectID); d != 0 { + return d + } + if d := containers.NativeCmp(a.ItemType, b.ItemType); d != 0 { + return d + } + return containers.NativeCmp(a.Offset, b.Offset) +} + +var _ containers.Ordered[Key] = Key{} + +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)) +} -- cgit v1.2.3-2-g168b