86 lines
1.5 KiB
Go
86 lines
1.5 KiB
Go
package types
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"errors"
|
|
"io"
|
|
)
|
|
|
|
func WriteBits(w io.Writer, data [8]bool) error {
|
|
encoded := byte(0)
|
|
for i, v := range data {
|
|
encoded = encoded | byte(BoolToUint(v)<<i)
|
|
}
|
|
_, err := w.Write([]byte{encoded})
|
|
return err
|
|
}
|
|
|
|
func WriteUint16(w io.Writer, v uint16) error {
|
|
buf := make([]byte, 2)
|
|
binary.BigEndian.PutUint16(buf, v)
|
|
_, err := w.Write(buf)
|
|
return err
|
|
}
|
|
|
|
func WriteUint32(w io.Writer, v uint32) error {
|
|
buf := make([]byte, 4)
|
|
binary.BigEndian.PutUint32(buf, v)
|
|
_, err := w.Write(buf)
|
|
return err
|
|
}
|
|
|
|
const uint32Max uint32 = ^uint32(0)
|
|
|
|
func WriteDataWithVarIntLen(w io.Writer, data []byte) error {
|
|
if len(data) > int(uint32Max) {
|
|
return errors.New("Tried to write more data than max varint size")
|
|
}
|
|
|
|
err := WriteVariableByteInt(w, uint32(len(data)))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = w.Write(data)
|
|
return err
|
|
}
|
|
|
|
const uint16Max uint16 = ^uint16(0)
|
|
|
|
func WriteBinaryData(w io.Writer, data []byte) error {
|
|
if len(data) > int(uint16Max) {
|
|
return errors.New("Tried to write more data than max uint16 size")
|
|
}
|
|
|
|
err := WriteUint16(w, uint16(len(data)))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = w.Write(data)
|
|
return err
|
|
}
|
|
|
|
func WriteUTF8String(w io.Writer, str string) error {
|
|
return WriteBinaryData(w, []byte(str))
|
|
}
|
|
|
|
func WriteVariableByteInt(w io.Writer, v uint32) error {
|
|
for {
|
|
encodedByte := byte(v % 128)
|
|
v = v / 128
|
|
|
|
if v > 0 {
|
|
encodedByte = encodedByte | 128
|
|
}
|
|
|
|
_,err := w.Write([]byte{encodedByte})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if v == 0 {
|
|
return nil
|
|
}
|
|
}
|
|
}
|