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The FileReader interface is the wrapper of io.Reader. It provides the fs.FileInfo as well. The FileBufReader struct is the wrapper of bufio.Reader, it also provides fs.FileInfo. Signed-off-by: Benjamin Wang <wachao@vmware.com>
61 lines
1.4 KiB
Go
61 lines
1.4 KiB
Go
// Copyright 2022 The etcd 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 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 fileutil
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import (
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"bufio"
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"io"
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"io/fs"
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"os"
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)
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// FileReader is a wrapper of io.Reader. It also provides file info.
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type FileReader interface {
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io.Reader
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FileInfo() (fs.FileInfo, error)
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}
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type fileReader struct {
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*os.File
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}
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func NewFileReader(f *os.File) FileReader {
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return &fileReader{f}
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}
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func (fr *fileReader) FileInfo() (fs.FileInfo, error) {
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return fr.Stat()
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}
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// FileBufReader is a wrapper of bufio.Reader. It also provides file info.
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type FileBufReader struct {
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*bufio.Reader
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fi fs.FileInfo
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}
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func NewFileBufReader(fr FileReader) *FileBufReader {
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bufReader := bufio.NewReader(fr)
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fi, err := fr.FileInfo()
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if err != nil {
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// This should never happen.
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panic(err)
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}
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return &FileBufReader{bufReader, fi}
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}
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func (fbr *FileBufReader) FileInfo() fs.FileInfo {
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return fbr.fi
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}
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