Installation with registry keys

src/shared/Utils.h

Index: src/shared/Utils.h
===================================================================
--- a/src/shared/Utils.h
+++ b/src/shared/Utils.h
@@ -5,7 +5,7 @@
 #include <locale>
 #include <functional>
 #include <string>
-
+#include <memory>
 
 bool IsWindowsVistaOrLater();
 
@@ -25,4 +25,31 @@
   return trimmed;
 }
 
+class Location {
+public:
+  /**
+    * Fully-qualified path to the file name of the engine executable.
+    */
+  static std::wstring engine();
+
+  /**
+    * Fully-qualified path to the locales/ directory. Ends in a backslash.
+    */
+  static std::wstring locales_dir();
+
+  /**
+    * Fully-qualified path to the html/ directory. Ends in a backslash.
+    */
+  static std::wstring html_dir();
+
+  /**
+    * Check that all the locations are known in the registry.
+    *
+    * While not a complete check of installation validity, this is a quick check to ensure that at least
+    * all the relevant registry keys are present. Strictly speaking, this is a development-cycle function,
+    * ensuring that the development environment is properly set up for testing.
+    */
+  static bool all_known();
+};
+
 #endif // UTILS_H