mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-10 00:10:20 +00:00
65 lines
1.9 KiB
Go
65 lines
1.9 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes 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 strings
|
|
|
|
import (
|
|
"bytes"
|
|
"io"
|
|
"strings"
|
|
)
|
|
|
|
// LineDelimiter is a filter that will split input on lines
|
|
// and bracket each line with the delimiter string.
|
|
type LineDelimiter struct {
|
|
output io.Writer
|
|
delimiter []byte
|
|
buf bytes.Buffer
|
|
}
|
|
|
|
// NewLineDelimiter allocates a new io.Writer that will split input on lines
|
|
// and bracket each line with the delimiter string. This can be useful in
|
|
// output tests where it is difficult to see and test trailing whitespace.
|
|
func NewLineDelimiter(output io.Writer, delimiter string) *LineDelimiter {
|
|
return &LineDelimiter{output: output, delimiter: []byte(delimiter)}
|
|
}
|
|
|
|
// Write writes buf to the LineDelimiter ld. The only errors returned are ones
|
|
// encountered while writing to the underlying output stream.
|
|
func (ld *LineDelimiter) Write(buf []byte) (n int, err error) {
|
|
return ld.buf.Write(buf)
|
|
}
|
|
|
|
// Flush all lines up until now. This will assume insert a linebreak at the current point of the stream.
|
|
func (ld *LineDelimiter) Flush() (err error) {
|
|
lines := strings.Split(ld.buf.String(), "\n")
|
|
for _, line := range lines {
|
|
if _, err = ld.output.Write(ld.delimiter); err != nil {
|
|
return
|
|
}
|
|
if _, err = ld.output.Write([]byte(line)); err != nil {
|
|
return
|
|
}
|
|
if _, err = ld.output.Write(ld.delimiter); err != nil {
|
|
return
|
|
}
|
|
if _, err = ld.output.Write([]byte("\n")); err != nil {
|
|
return
|
|
}
|
|
}
|
|
return
|
|
}
|