blob: 91b7029a69176f901b40bd0ba8b301af5fad680b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
package btrfsitem
import (
"fmt"
"reflect"
"lukeshu.com/btrfs-tools/pkg/binstruct"
"lukeshu.com/btrfs-tools/pkg/btrfs/internal"
)
type Type = internal.ItemType
type Item interface {
isItem()
}
func UnmarshalItem(keytyp Type, dat []byte) (Item, error) {
gotyp, ok := keytype2gotype[keytyp]
if !ok {
return nil, fmt.Errorf("btrfsitem.UnmarshalItem: unknown item type: %v", keytyp)
}
retPtr := reflect.New(gotyp)
n, err := binstruct.Unmarshal(dat, retPtr.Interface())
if err != nil {
return nil, fmt.Errorf("btrfsitem.UnmarshalItem: %w", err)
}
if n < len(dat) {
return nil, fmt.Errorf("btrfsitem.UnmarshalItem: left over data: got %d bytes but only consumed %d",
len(dat), n)
}
return retPtr.Elem().Interface().(Item), nil
}
|
