New cpp folder structure

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

libs/search/string_utils.cpp

@@ -0,0 +1,28 @@
+#include "search/string_utils.hpp"
+
+#include "indexer/search_string_utils.hpp"
+
+#include "base/stl_helpers.hpp"
+
+namespace search
+{
+
+QueryString MakeQueryString(std::string s)
+{
+  QueryString qs;
+  qs.m_query = std::move(s);
+
+  Delimiters delims;
+  auto const uniString = NormalizeAndSimplifyString(qs.m_query);
+  SplitUniString(uniString, base::MakeBackInsertFunctor(qs.m_tokens), delims);
+
+  if (!qs.m_tokens.empty() && !delims(uniString.back()))
+  {
+    qs.m_prefix = qs.m_tokens.back();
+    qs.m_tokens.pop_back();
+  }
+
+  return qs;
+}
+
+} // namespace search