1 files changed, 12 insertions, 0 deletions
diff --git a/lib.go b/lib.go
index 5649f65..1bcb8fc 100644
--- a/lib.go
+++ b/lib.go
@@ -3,6 +3,7 @@ package excelize
 import (
 	"archive/zip"
 	"bytes"
+	"encoding/gob"
 	"io"
 	"log"
 	"math"
@@ -104,3 +105,14 @@ func intOnlyMapF(rune rune) rune {
 	}
 	return -1
 }
+
+// deepCopy provides method to creates a deep copy of whatever is passed to it
+// and returns the copy in an interface. The returned value will need to be
+// asserted to the correct type.
+func deepCopy(dst, src interface{}) error {
+	var buf bytes.Buffer
+	if err := gob.NewEncoder(&buf).Encode(src); err != nil {
+		return err
+	}
+	return gob.NewDecoder(bytes.NewBuffer(buf.Bytes())).Decode(dst)
+}