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Avoid reallocation of initial slice in MarshalBinary (GobEncode) (#355)

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Philip Dubé 2024-04-03 20:12:19 +00:00 committed by GitHub
parent 78289cc844
commit 547861c49b
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1 changed files with 9 additions and 10 deletions
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19
decimal.go
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@ -1784,19 +1784,18 @@ func (d *Decimal) UnmarshalBinary(data []byte) error {
// MarshalBinary implements the encoding.BinaryMarshaler interface.
func (d Decimal) MarshalBinary() (data []byte, err error) {
// Write the exponent first since it's a fixed size
v1 := make([]byte, 4)
binary.BigEndian.PutUint32(v1, uint32(d.exp))
// Add the value
var v2 []byte
if v2, err = d.value.GobEncode(); err != nil {
return
// exp is written first, but encode value first to know output size
var valueData []byte
if valueData, err = d.value.GobEncode(); err != nil {
return nil, err
}
// Write the exponent in front, since it's a fixed size
expData := make([]byte, 4, len(valueData)+4)
binary.BigEndian.PutUint32(expData, uint32(d.exp))
// Return the byte array
data = append(v1, v2...)
return
return append(expData, valueData...), nil
}
// Scan implements the sql.Scanner interface for database deserialization.