2 netstring -- netstring format serialization library
3 Copyright (C) 2015-2020 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, version 3 of the License.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
32 func NewWriter(w io.Writer) *Writer {
34 writer: bufio.NewWriter(w),
35 prefix: make([]byte, 0, MaxPrefixSize),
39 // Write serialized representation of data to the underlying writer.
40 // It returns number of serialized data bytes written.
41 func (self *Writer) Write(data []byte) (bytesWritten int, err error) {
42 self.prefix = strconv.AppendUint(self.prefix[:0], uint64(len(data)), 10)
43 self.prefix = append(self.prefix, ':')
44 if _, self.err = self.writer.Write(self.prefix); self.err != nil {
47 if _, self.err = self.writer.Write(data); self.err != nil {
50 if _, self.err = self.writer.Write([]byte{','}); self.err != nil {
53 if self.err = self.writer.Flush(); self.err != nil {
56 return len(self.prefix) + len(data) + 1, nil