78 lines
1.4 KiB
Go
78 lines
1.4 KiB
Go
package storagegroup
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import (
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"github.com/nspcc-dev/neofs-api-go/util/proto"
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)
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const (
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sizeField = 1
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hashField = 2
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expirationField = 3
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objectIDsField = 4
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)
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// StableMarshal marshals unified storage group structure in a protobuf
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// compatible way without field order shuffle.
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func (s *StorageGroup) StableMarshal(buf []byte) ([]byte, error) {
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if s == nil {
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return []byte{}, nil
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}
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if buf == nil {
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buf = make([]byte, s.StableSize())
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}
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var (
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offset, n int
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err error
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)
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n, err = proto.UInt64Marshal(sizeField, buf[offset:], s.size)
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if err != nil {
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return nil, err
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}
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offset += n
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n, err = proto.NestedStructureMarshal(hashField, buf[offset:], s.hash)
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if err != nil {
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return nil, err
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}
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offset += n
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n, err = proto.UInt64Marshal(expirationField, buf[offset:], s.exp)
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if err != nil {
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return nil, err
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}
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offset += n
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for i := range s.members {
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n, err = proto.NestedStructureMarshal(objectIDsField, buf[offset:], s.members[i])
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if err != nil {
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return nil, err
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}
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offset += n
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}
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return buf, nil
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}
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// StableSize of storage group structure marshalled by StableMarshal function.
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func (s *StorageGroup) StableSize() (size int) {
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if s == nil {
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return 0
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}
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size += proto.UInt64Size(sizeField, s.size)
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size += proto.NestedStructureSize(hashField, s.hash)
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size += proto.UInt64Size(expirationField, s.exp)
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for i := range s.members {
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size += proto.NestedStructureSize(objectIDsField, s.members[i])
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}
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return size
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}
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