forked from funny/link
/
codec_self.go
74 lines (60 loc) · 1.51 KB
/
codec_self.go
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package link
import (
"bufio"
"github.com/funny/binary"
)
func SelfCodec() PSCodecType {
return selfCodecType{}
}
type selfCodecType struct{}
func (_ selfCodecType) NewPacketCodec() PacketCodec {
codec := &selfPacketCodec{}
codec.r = binary.NewReader(&codec.rbuf)
codec.w = binary.NewWriter(&codec.wbuf)
return codec
}
func (_ selfCodecType) NewStreamCodec(r *bufio.Reader, w *bufio.Writer) StreamCodec {
return selfStreamCodec{
binary.NewReader(r),
binary.NewWriter(w),
}
}
type SelfDecode interface {
BinaryDecode(*binary.Reader) error
}
type SelfEncode interface {
BinaryEncode(*binary.Writer) error
}
type selfPacketCodec struct {
rbuf binary.Buffer
wbuf binary.Buffer
r *binary.Reader
w *binary.Writer
}
func (codec *selfPacketCodec) DecodePacket(msg interface{}, b []byte) error {
codec.rbuf.Reset(b)
return msg.(SelfDecode).BinaryDecode(codec.r)
}
func (codec *selfPacketCodec) EncodePacket(msg interface{}) ([]byte, error) {
codec.wbuf.Reset(codec.wbuf.Data[0:0])
if err := msg.(SelfEncode).BinaryEncode(codec.w); err != nil {
return nil, err
}
return codec.wbuf.Bytes(), nil
}
type selfStreamCodec struct {
r *binary.Reader
w *binary.Writer
}
func (codec selfStreamCodec) DecodeStream(msg interface{}) error {
if err := msg.(SelfDecode).BinaryDecode(codec.r); err != nil {
return err
}
return codec.r.Error()
}
func (codec selfStreamCodec) EncodeStream(msg interface{}) error {
if err := msg.(SelfEncode).BinaryEncode(codec.w); err != nil {
return err
}
return codec.w.Flush()
}