New cpp folder structure

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

libs/base/uni_string_dfa.cpp

@@ -0,0 +1,40 @@
+#include "base/uni_string_dfa.hpp"
+
+#include "base/assert.hpp"
+
+namespace strings
+{
+// UniStringDFA::Iterator --------------------------------------------------------------------------
+UniStringDFA::Iterator::Iterator(UniString const & s) : m_s(s), m_pos(0), m_rejected(false) {}
+
+UniStringDFA::Iterator & UniStringDFA::Iterator::Move(UniChar c)
+{
+  if (Accepts())
+  {
+    m_rejected = true;
+    return *this;
+  }
+
+  if (Rejects())
+    return *this;
+
+  ASSERT_LESS(m_pos, m_s.size(), ());
+  if (m_s[m_pos] != c)
+  {
+    m_rejected = true;
+    return *this;
+  }
+
+  ++m_pos;
+  return *this;
+}
+
+// UniStringDFA::UniStringDFA ----------------------------------------------------------------------
+UniStringDFA::UniStringDFA(std::string const & s) : UniStringDFA(MakeUniString(s)) {}
+
+std::string DebugPrint(UniStringDFA const & dfa)
+{
+  return DebugPrint(dfa.m_s);
+}
+
+}  // namespace strings