New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/storage/country_decl.cpp

@@ -0,0 +1,36 @@
+#include "storage/country_decl.hpp"
+
+#include <cstddef>
+
+using namespace std;
+
+namespace storage
+{
+// static
+void CountryInfo::FileName2FullName(string & fName)
+{
+  size_t const i = fName.find('_');
+  if (i != string::npos)
+  {
+    // replace '_' with ", "
+    fName[i] = ',';
+    fName.insert(i+1, " ");
+  }
+}
+
+// static
+void CountryInfo::FullName2GroupAndMap(string const & fName, string & group, string & map)
+{
+  size_t pos = fName.find(',');
+  if (pos == string::npos)
+  {
+    map = fName;
+    group.clear();
+  }
+  else
+  {
+    map = fName.substr(pos + 2);
+    group = fName.substr(0, pos);
+  }
+}
+}  // namespace storage