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// Copyright 2022 The etcd Authors
//
// Licensed 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 fileutil
import (
"bufio"
"io"
"io/fs"
"os"
)
// FileReader is a wrapper of io.Reader. It also provides file info.
type FileReader interface {
io.Reader
FileInfo() (fs.FileInfo, error)
}
type fileReader struct {
*os.File
}
func NewFileReader(f *os.File) FileReader {
return &fileReader{f}
}
func (fr *fileReader) FileInfo() (fs.FileInfo, error) {
return fr.Stat()
}
// FileBufReader is a wrapper of bufio.Reader. It also provides file info.
type FileBufReader struct {
*bufio.Reader
fi fs.FileInfo
}
func NewFileBufReader(fr FileReader) *FileBufReader {
bufReader := bufio.NewReader(fr)
fi, err := fr.FileInfo()
if err != nil {
// This should never happen.
panic(err)
}
return &FileBufReader{bufReader, fi}
}
func (fbr *FileBufReader) FileInfo() fs.FileInfo {
return fbr.fi
}
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