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43 lines
1.0 KiB
Go
43 lines
1.0 KiB
Go
package loopdb
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import (
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"fmt"
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)
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// itob returns an 8-byte big endian representation of v.
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func itob(v uint64) []byte {
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b := make([]byte, 8)
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byteOrder.PutUint64(b, v)
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return b
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}
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// UnmarshalProtocolVersion attempts to unmarshal a byte slice to a
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// ProtocolVersion value. If the unmarshal fails, ProtocolVersionUnrecorded is
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// returned along with an error.
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func UnmarshalProtocolVersion(b []byte) (ProtocolVersion, error) {
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if b == nil {
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return ProtocolVersionUnrecorded, nil
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}
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if len(b) != 4 {
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return ProtocolVersionUnrecorded,
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fmt.Errorf("invalid size: %v", len(b))
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}
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version := ProtocolVersion(byteOrder.Uint32(b))
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if !version.Valid() {
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return ProtocolVersionUnrecorded,
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fmt.Errorf("invalid protocol version: %v", version)
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}
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return version, nil
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}
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// MarshalProtocolVersion marshals a ProtocolVersion value to a byte slice.
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func MarshalProtocolVersion(version ProtocolVersion) []byte {
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var versionBytes [4]byte
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byteOrder.PutUint32(versionBytes[:], uint32(version))
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return versionBytes[:]
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}
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