switch to go vendoring

vendor/github.com/shamaton/msgpack/v2/ext/decode.go

@@ -0,0 +1,40 @@
+package ext
+
+import (
+	"reflect"
+
+	"github.com/shamaton/msgpack/v2/def"
+)
+
+type Decoder interface {
+	Code() int8
+	IsType(offset int, d *[]byte) bool
+	AsValue(offset int, k reflect.Kind, d *[]byte) (interface{}, int, error)
+}
+
+type DecoderCommon struct {
+}
+
+func (cd *DecoderCommon) ReadSize1(index int, d *[]byte) (byte, int) {
+	rb := def.Byte1
+	return (*d)[index], index + rb
+}
+
+func (cd *DecoderCommon) ReadSize2(index int, d *[]byte) ([]byte, int) {
+	rb := def.Byte2
+	return (*d)[index : index+rb], index + rb
+}
+
+func (cd *DecoderCommon) ReadSize4(index int, d *[]byte) ([]byte, int) {
+	rb := def.Byte4
+	return (*d)[index : index+rb], index + rb
+}
+
+func (cd *DecoderCommon) ReadSize8(index int, d *[]byte) ([]byte, int) {
+	rb := def.Byte8
+	return (*d)[index : index+rb], index + rb
+}
+
+func (cd *DecoderCommon) ReadSizeN(index, n int, d *[]byte) ([]byte, int) {
+	return (*d)[index : index+n], index + n
+}