switch to go vendoring

vendor/github.com/shamaton/msgpack/v2/internal/decoding/bin.go

@@ -0,0 +1,55 @@
+package decoding
+
+import (
+	"encoding/binary"
+	"reflect"
+	"unsafe"
+
+	"github.com/shamaton/msgpack/v2/def"
+)
+
+func (d *decoder) isCodeBin(v byte) bool {
+	switch v {
+	case def.Bin8, def.Bin16, def.Bin32:
+		return true
+	}
+	return false
+}
+
+func (d *decoder) asBin(offset int, k reflect.Kind) ([]byte, int, error) {
+	code, offset, err := d.readSize1(offset)
+	if err != nil {
+		return emptyBytes, 0, err
+	}
+
+	switch code {
+	case def.Bin8:
+		l, offset, err := d.readSize1(offset)
+		if err != nil {
+			return emptyBytes, 0, err
+		}
+		o := offset + int(uint8(l))
+		return d.data[offset:o], o, nil
+	case def.Bin16:
+		bs, offset, err := d.readSize2(offset)
+		o := offset + int(binary.BigEndian.Uint16(bs))
+		if err != nil {
+			return emptyBytes, 0, err
+		}
+		return d.data[offset:o], o, nil
+	case def.Bin32:
+		bs, offset, err := d.readSize4(offset)
+		o := offset + int(binary.BigEndian.Uint32(bs))
+		if err != nil {
+			return emptyBytes, 0, err
+		}
+		return d.data[offset:o], o, nil
+	}
+
+	return emptyBytes, 0, d.errorTemplate(code, k)
+}
+
+func (d *decoder) asBinString(offset int, k reflect.Kind) (string, int, error) {
+	bs, offset, err := d.asBin(offset, k)
+	return *(*string)(unsafe.Pointer(&bs)), offset, err
+}