| package binary |
| |
| import ( |
| "encoding/binary" |
| "io" |
| ) |
| |
| // Write writes the binary representation of data into w, using BigEndian order |
| // https://golang.org/pkg/encoding/binary/#Write |
| func Write(w io.Writer, data ...interface{}) error { |
| for _, v := range data { |
| if err := binary.Write(w, binary.BigEndian, v); err != nil { |
| return err |
| } |
| } |
| |
| return nil |
| } |
| |
| func WriteVariableWidthInt(w io.Writer, n int64) error { |
| buf := []byte{byte(n & 0x7f)} |
| n >>= 7 |
| for n != 0 { |
| n-- |
| buf = append([]byte{0x80 | (byte(n & 0x7f))}, buf...) |
| n >>= 7 |
| } |
| |
| _, err := w.Write(buf) |
| |
| return err |
| } |
| |
| // WriteUint64 writes the binary representation of a uint64 into w, in BigEndian |
| // order |
| func WriteUint64(w io.Writer, value uint64) error { |
| return binary.Write(w, binary.BigEndian, value) |
| } |
| |
| // WriteUint32 writes the binary representation of a uint32 into w, in BigEndian |
| // order |
| func WriteUint32(w io.Writer, value uint32) error { |
| return binary.Write(w, binary.BigEndian, value) |
| } |
| |
| // WriteUint16 writes the binary representation of a uint16 into w, in BigEndian |
| // order |
| func WriteUint16(w io.Writer, value uint16) error { |
| return binary.Write(w, binary.BigEndian, value) |
| } |