63 lines
1.2 KiB
Go
63 lines
1.2 KiB
Go
/*
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Copyright 2014 CoreOS Inc.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package wal
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import (
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"io"
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)
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type block struct {
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t int64
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d []byte
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}
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func writeBlock(w io.Writer, t int64, d []byte) error {
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if err := writeInt64(w, t); err != nil {
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return err
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}
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if err := writeInt64(w, int64(len(d))); err != nil {
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return err
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}
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_, err := w.Write(d)
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return err
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}
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func readBlock(r io.Reader, b *block) error {
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t, err := readInt64(r)
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if err != nil {
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return err
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}
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l, err := readInt64(r)
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if err != nil {
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return unexpectedEOF(err)
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}
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d := make([]byte, l)
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if _, err = io.ReadFull(r, d); err != nil {
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return unexpectedEOF(err)
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}
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b.t = t
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b.d = d
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return nil
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}
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func unexpectedEOF(err error) error {
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if err == io.EOF {
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return io.ErrUnexpectedEOF
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}
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return err
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}
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