wehub-resource-sync
68 lines
2.0 KiB
Go
68 lines
2.0 KiB
Go
// Copyright 2026 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package casts
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import (
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"context"
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"github.com/cockroachdb/errors"
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"github.com/dolthub/doltgresql/core/id"
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"github.com/dolthub/doltgresql/utils"
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)
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// Serialize returns the Cast as a byte slice. If the Cast is invalid, then this returns a nil slice.
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func (cast Cast) Serialize(ctx context.Context) ([]byte, error) {
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if !cast.ID.IsValid() {
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return nil, nil
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}
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// Initialize the writer and version
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writer := utils.NewWriter(256)
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writer.VariableUint(0) // Version
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// Write the cast data
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writer.Id(cast.ID.AsId())
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writer.Uint8(uint8(cast.CastType))
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writer.Id(cast.Function.AsId())
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writer.Bool(cast.UseInOut)
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// Returns the data
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return writer.Data(), nil
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}
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// DeserializeCast returns the Cast that was serialized in the byte slice. Returns an empty Cast (invalid ID) if data is
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// nil or empty.
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func DeserializeCast(ctx context.Context, data []byte) (Cast, error) {
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if len(data) == 0 {
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return Cast{}, nil
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}
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reader := utils.NewReader(data)
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version := reader.VariableUint()
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if version != 0 {
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return Cast{}, errors.Errorf("version %d of casts is not supported, please upgrade the server", version)
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}
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// Read from the reader
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t := Cast{}
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t.ID = id.Cast(reader.Id())
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t.CastType = CastType(reader.Uint8())
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t.Function = id.Function(reader.Id())
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t.UseInOut = reader.Bool()
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if !reader.IsEmpty() {
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return Cast{}, errors.Errorf("extra data found while deserializing a cast")
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}
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// Return the deserialized object
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return t, nil
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}
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