forked from TrueCloudLab/frostfs-api-go
83 lines
1.6 KiB
Go
83 lines
1.6 KiB
Go
package tombstone
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import (
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"github.com/nspcc-dev/neofs-api-go/util/proto"
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tombstone "github.com/nspcc-dev/neofs-api-go/v2/tombstone/grpc"
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goproto "google.golang.org/protobuf/proto"
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)
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const (
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expFNum = 1
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splitIDFNum = 2
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membersFNum = 3
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)
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// StableMarshal marshals unified tombstone message in a protobuf
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// compatible way without field order shuffle.
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func (s *Tombstone) 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(expFNum, 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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n, err = proto.BytesMarshal(splitIDFNum, buf[offset:], s.splitID)
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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(membersFNum, 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 returns size of tombstone message marshalled by StableMarshal function.
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func (s *Tombstone) 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(expFNum, s.exp)
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size += proto.BytesSize(splitIDFNum, s.splitID)
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for i := range s.members {
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size += proto.NestedStructureSize(membersFNum, s.members[i])
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}
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return size
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}
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// Unmarshal unmarshal tombstone message from its binary representation.
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func (s *Tombstone) Unmarshal(data []byte) error {
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m := new(tombstone.Tombstone)
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if err := goproto.Unmarshal(data, m); err != nil {
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return err
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}
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*s = *TombstoneFromGRPCMessage(m)
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return nil
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}
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