oppi.li
1package binary
2
3import (
4 "encoding/binary"
5 "io"
6)
7
8// Write writes the binary representation of data into w, using BigEndian order
9// https://golang.org/pkg/encoding/binary/#Write
10func Write(w io.Writer, data ...interface{}) error {
11 for _, v := range data {
12 if err := binary.Write(w, binary.BigEndian, v); err != nil {
13 return err
14 }
15 }
16
17 return nil
18}
19
20func WriteVariableWidthInt(w io.Writer, n int64) error {
21 buf := []byte{byte(n & 0x7f)}
22 n >>= 7
23 for n != 0 {
24 n--
25 buf = append([]byte{0x80 | (byte(n & 0x7f))}, buf...)
26 n >>= 7
27 }
28
29 _, err := w.Write(buf)
30
31 return err
32}
33
34// WriteUint64 writes the binary representation of a uint64 into w, in BigEndian
35// order
36func WriteUint64(w io.Writer, value uint64) error {
37 return binary.Write(w, binary.BigEndian, value)
38}
39
40// WriteUint32 writes the binary representation of a uint32 into w, in BigEndian
41// order
42func WriteUint32(w io.Writer, value uint32) error {
43 return binary.Write(w, binary.BigEndian, value)
44}
45
46// WriteUint16 writes the binary representation of a uint16 into w, in BigEndian
47// order
48func WriteUint16(w io.Writer, value uint16) error {
49 return binary.Write(w, binary.BigEndian, value)
50}