update mod

vendor/github.com/siddontang/rdb/encode.go

@@ -0,0 +1,52 @@
+package rdb
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/cupcake/rdb"
+)
+
+func Dump(obj interface{}) ([]byte, error) {
+	var buf bytes.Buffer
+
+	e := rdb.NewEncoder(&buf)
+
+	switch v := obj.(type) {
+	case String:
+		e.EncodeType(rdb.TypeString)
+		e.EncodeString(v)
+	case Hash:
+		e.EncodeType(rdb.TypeHash)
+		e.EncodeLength(uint32(len(v)))
+
+		for i := 0; i < len(v); i++ {
+			e.EncodeString(v[i].Field)
+			e.EncodeString(v[i].Value)
+		}
+	case List:
+		e.EncodeType(rdb.TypeList)
+		e.EncodeLength(uint32(len(v)))
+		for i := 0; i < len(v); i++ {
+			e.EncodeString(v[i])
+		}
+	case Set:
+		e.EncodeType(rdb.TypeSet)
+		e.EncodeLength(uint32(len(v)))
+		for i := 0; i < len(v); i++ {
+			e.EncodeString(v[i])
+		}
+	case ZSet:
+		e.EncodeType(rdb.TypeZSet)
+		e.EncodeLength(uint32(len(v)))
+		for i := 0; i < len(v); i++ {
+			e.EncodeString(v[i].Member)
+			e.EncodeFloat(v[i].Score)
+		}
+	default:
+		return nil, fmt.Errorf("invalid dump type %T", obj)
+	}
+
+	e.EncodeDumpFooter()
+
+	return buf.Bytes(), nil
+}