add mft read method

ntfs/utf16/decode.go

@@ -0,0 +1,18 @@
+package utf16
+
+import (
+	"encoding/binary"
+	"unicode/utf16"
+)
+
+// Decode the input data as UTF-16 using the provided byte order and convert the result to a string. The input data
+// length must be a multiple of 2. DecodeString will panic if that is not the case.
+func DecodeString(b []byte, bo binary.ByteOrder) string {
+	slen := len(b) / 2
+	shorts := make([]uint16, slen)
+	for i := 0; i < slen; i++ {
+		bi := i * 2
+		shorts[i] = bo.Uint16(b[bi : bi+2])
+	}
+	return string(utf16.Decode(shorts))
+}