70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
package ormfield
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import (
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"io"
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"google.golang.org/protobuf/reflect/protoreflect"
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)
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// TimestampCodec DurationCodec encodes a google.protobuf.Timestamp value as 12 bytes using
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// Int64Codec for seconds followed by Int32Codec for nanos. This allows for
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// sorted iteration.
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type TimestampCodec struct{}
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var (
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timestampSecondsField = timestampMsgType.Descriptor().Fields().ByName("seconds")
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timestampNanosField = timestampMsgType.Descriptor().Fields().ByName("nanos")
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)
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func getTimestampSecondsAndNanos(value protoreflect.Value) (protoreflect.Value, protoreflect.Value) {
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msg := value.Message()
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return msg.Get(timestampSecondsField), msg.Get(timestampNanosField)
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}
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func (t TimestampCodec) Decode(r Reader) (protoreflect.Value, error) {
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seconds, err := int64Codec.Decode(r)
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if err != nil {
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return protoreflect.Value{}, err
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}
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nanos, err := int32Codec.Decode(r)
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if err != nil {
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return protoreflect.Value{}, err
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}
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msg := timestampMsgType.New()
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msg.Set(timestampSecondsField, seconds)
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msg.Set(timestampNanosField, nanos)
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return protoreflect.ValueOfMessage(msg), nil
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}
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func (t TimestampCodec) Encode(value protoreflect.Value, w io.Writer) error {
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seconds, nanos := getTimestampSecondsAndNanos(value)
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err := int64Codec.Encode(seconds, w)
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if err != nil {
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return err
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}
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return int32Codec.Encode(nanos, w)
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}
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func (t TimestampCodec) Compare(v1, v2 protoreflect.Value) int {
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s1, n1 := getTimestampSecondsAndNanos(v1)
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s2, n2 := getTimestampSecondsAndNanos(v2)
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c := compareInt(s1, s2)
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if c != 0 {
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return c
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} else {
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return compareInt(n1, n2)
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}
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}
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func (t TimestampCodec) IsOrdered() bool {
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return true
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}
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func (t TimestampCodec) FixedBufferSize() int {
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return 12
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}
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func (t TimestampCodec) ComputeBufferSize(protoreflect.Value) (int, error) {
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return t.FixedBufferSize(), nil
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}
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