[Reviews] Code correction and improvement

bootloader/utility.cpp

@@ -0,0 +1,10 @@
+#include <bootloader/utility.h>
+#include <string.h>
+
+int Bootloader::Utility::versionSum(const char * version, int length) {
+    int sum = 0;
+    for (int i  = 0; i < length; i++) {
+        sum += version[i] * (strlen(version) * 100 - i * 10);
+    }
+    return sum;
+}