| // Copyright 2015 Google Inc. All rights reserved |
| // |
| // 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 kati |
| |
| import "io" |
| |
| // ssvWriter is a writer to write space separated values. |
| type ssvWriter struct { |
| w io.Writer |
| needsSpace bool |
| } |
| |
| func writeByte(w io.Writer, b byte) error { |
| if bw, ok := w.(io.ByteWriter); ok { |
| return bw.WriteByte(b) |
| } |
| _, err := w.Write([]byte{b}) |
| return err |
| } |
| |
| // use io.WriteString to stringWrite. |
| |
| func (sw *ssvWriter) Write(b []byte) { |
| if sw.needsSpace { |
| writeByte(sw.w, ' ') |
| } |
| sw.needsSpace = true |
| sw.w.Write(b) |
| } |
| |
| func (sw *ssvWriter) WriteString(s string) { |
| if sw.needsSpace { |
| writeByte(sw.w, ' ') |
| } |
| sw.needsSpace = true |
| io.WriteString(sw.w, s) |
| } |