mirror of
https://github.com/cubefs/cubefs.git
synced 2026-08-02 02:00:56 +00:00
50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
// Copyright 2022 The CubeFS Authors.
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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
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// implied. See the License for the specific language governing
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// permissions and limitations under the License.
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package crc32block
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import (
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"encoding/binary"
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"hash/crc32"
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)
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const (
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defaultCrc32BlockSize = 64 * 1024
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)
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var gBlockSize int64 = defaultCrc32BlockSize
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type blockUnit []byte
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func (b blockUnit) length() int {
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return len(b)
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}
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func (b blockUnit) payload() int {
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return len(b) - crc32Len
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}
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func (b blockUnit) check() (err error) {
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payloadCrc := crc32.ChecksumIEEE(b[crc32Len:])
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if binary.LittleEndian.Uint32(b) != payloadCrc {
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return ErrMismatchedCrc
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}
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return nil
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}
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func (b blockUnit) writeCrc() {
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payloadCrc := crc32.ChecksumIEEE(b[crc32Len:])
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binary.LittleEndian.PutUint32(b, payloadCrc)
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}
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