bytesconv

bytesconv/uint64.go

@@ -0,0 +1,31 @@
+package bytesconv
+
+import "fmt"
+
+type endian int
+
+const (
+	BigEndian endian = iota + 1
+	LittleEndian
+)
+
+func (e endian) BytesToUInt64(data []byte) (uint64, error) {
+	if len(data) > 8 {
+		return 0, fmt.Errorf("bytes to uint64, bytes length is invaild")
+	}
+
+	var ret uint64
+	var len int = len(data)
+
+	if e == BigEndian {
+		for i := 0; i < len; i++ {
+			ret = ret | (uint64(data[len-1-i]) << (i * 8))
+		}
+	} else {
+		for i := 0; i < len; i++ {
+			ret = ret | (uint64(data[i]) << (i * 8))
+		}
+	}
+
+	return ret, nil
+}