forked from apache/beam
/
bool.go
57 lines (52 loc) · 1.74 KB
/
bool.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package coder
import (
"io"
"github.com/apache/beam/sdks/go/pkg/beam/core/util/ioutilx"
"github.com/apache/beam/sdks/go/pkg/beam/internal/errors"
)
// EncodeBool encodes a boolean according to the beam protocol.
func EncodeBool(v bool, w io.Writer) error {
// Encoding: false = 0, true = 1
var err error
if v {
_, err = ioutilx.WriteUnsafe(w, []byte{1})
} else {
_, err = ioutilx.WriteUnsafe(w, []byte{0})
}
if err != nil {
return errors.Wrap(err, "error encoding bool")
}
return nil
}
// DecodeBool decodes a boolean according to the beam protocol.
func DecodeBool(r io.Reader) (bool, error) {
// Encoding: false = 0, true = 1
var b [1]byte
if err := ioutilx.ReadNBufUnsafe(r, b[:]); err != nil {
if err == io.EOF {
return false, err
}
return false, errors.Wrap(err, "error decoding bool")
}
switch b[0] {
case 0:
return false, nil
case 1:
return true, nil
}
return false, errors.Errorf("error decoding bool: received invalid value %v", b[0])
}