frostfs-api-go/v2/storagegroup/marshal.go
Alex Vanin 1ae7f9b491 Fix lint warnings in storage group package
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
2020-09-18 10:42:05 +03:00

95 lines
1.9 KiB
Go

package storagegroup
import (
"encoding/binary"
"github.com/nspcc-dev/neofs-api-go/util/proto"
)
const (
// SizeField order number from storage group proto definition.
SizeField = 1
// HashField order number from storage group proto definition.
HashField = 2
// ExpirationField order number from storage group proto definition.
ExpirationField = 3
// ObjectIDsField order number from storage group proto definition.
ObjectIDsField = 4
)
// StableMarshal marshals unified storage group structure in a protobuf
// compatible way without field order shuffle.
func (s *StorageGroup) StableMarshal(buf []byte) ([]byte, error) {
if s == nil {
return []byte{}, nil
}
if buf == nil {
buf = make([]byte, s.StableSize())
}
var (
offset, n int
prefix uint64
err error
)
n, err = proto.UInt64Marshal(SizeField, buf, s.size)
if err != nil {
return nil, err
}
offset += n
n, err = proto.BytesMarshal(HashField, buf[offset:], s.hash)
if err != nil {
return nil, err
}
offset += n
n, err = proto.UInt64Marshal(ExpirationField, buf[offset:], s.exp)
if err != nil {
return nil, err
}
offset += n
prefix, _ = proto.NestedStructurePrefix(ObjectIDsField)
for i := range s.members {
offset += binary.PutUvarint(buf[offset:], prefix)
n = s.members[i].StableSize()
offset += binary.PutUvarint(buf[offset:], uint64(n))
_, err = s.members[i].StableMarshal(buf[offset:])
if err != nil {
return nil, err
}
offset += n
}
return buf, nil
}
// StableSize of storage group structure marshalled by StableMarshal function.
func (s *StorageGroup) StableSize() (size int) {
if s == nil {
return 0
}
size += proto.UInt64Size(SizeField, s.size)
size += proto.BytesSize(HashField, s.hash)
size += proto.UInt64Size(ExpirationField, s.exp)
_, ln := proto.NestedStructurePrefix(ObjectIDsField)
for i := range s.members {
n := s.members[i].StableSize()
size += ln + proto.VarUIntSize(uint64(n)) + n
}
return size
}