2 netstring -- netstring format serialization library
3 Copyright (C) 2015 Sergey Matveev <stargrave@stargrave.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
33 func NewWriter(w io.Writer) *Writer {
35 writer: bufio.NewWriter(w),
36 prefix: make([]byte, 0, MaxPrefixSize),
40 // Write serialized representation of data to the underlying writer.
41 // It returns number of serialized data bytes written.
42 func (self *Writer) Write(data []byte) (bytesWritten int, err error) {
43 self.prefix = strconv.AppendUint(self.prefix[:0], uint64(len(data)), 10)
44 self.prefix = append(self.prefix, ':')
45 if _, self.err = self.writer.Write(self.prefix); self.err != nil {
48 if _, self.err = self.writer.Write(data); self.err != nil {
51 if _, self.err = self.writer.Write([]byte{','}); self.err != nil {
54 if self.err = self.writer.Flush(); self.err != nil {
57 return len(self.prefix) + len(data) + 1, nil