syncthing/vendor/github.com/onsi/ginkgo/internal/writer/writer.go
2017-04-05 14:34:41 +00:00

82 lines
1.3 KiB
Go

package writer
import (
"bytes"
"io"
"sync"
)
type WriterInterface interface {
io.Writer
Truncate()
DumpOut()
DumpOutWithHeader(header string)
Bytes() []byte
}
type Writer struct {
buffer *bytes.Buffer
outWriter io.Writer
lock *sync.Mutex
stream bool
}
func New(outWriter io.Writer) *Writer {
return &Writer{
buffer: &bytes.Buffer{},
lock: &sync.Mutex{},
outWriter: outWriter,
stream: true,
}
}
func (w *Writer) SetStream(stream bool) {
w.lock.Lock()
defer w.lock.Unlock()
w.stream = stream
}
func (w *Writer) Write(b []byte) (n int, err error) {
w.lock.Lock()
defer w.lock.Unlock()
n, err = w.buffer.Write(b)
if w.stream {
return w.outWriter.Write(b)
}
return n, err
}
func (w *Writer) Truncate() {
w.lock.Lock()
defer w.lock.Unlock()
w.buffer.Reset()
}
func (w *Writer) DumpOut() {
w.lock.Lock()
defer w.lock.Unlock()
if !w.stream {
w.buffer.WriteTo(w.outWriter)
}
}
func (w *Writer) Bytes() []byte {
w.lock.Lock()
defer w.lock.Unlock()
b := w.buffer.Bytes()
copied := make([]byte, len(b))
copy(copied, b)
return copied
}
func (w *Writer) DumpOutWithHeader(header string) {
w.lock.Lock()
defer w.lock.Unlock()
if !w.stream && w.buffer.Len() > 0 {
w.outWriter.Write([]byte(header))
w.buffer.WriteTo(w.outWriter)
}
}