1 files changed, 55 insertions, 0 deletions
diff --git a/src/include/tome/enum_string_map.hpp b/src/include/tome/enum_string_map.hpp
new file mode 100644
index 00000000..8ae1e115
--- /dev/null
+++ b/src/include/tome/enum_string_map.hpp
@@ -0,0 +1,55 @@
+#pragma once
+
+#include <boost/bimap.hpp>
+#include <boost/noncopyable.hpp>
+#include <string>
+#include <cassert>
+
+/**
+ * Bidirectional mapping between enumerated values
+ * and strings.
+ */
+template <class E>
+class EnumStringMap : boost::noncopyable {
+
+private:
+	typedef boost::bimap< E, std::string > bimap_type;
+	typedef typename bimap_type::value_type value_type;
+
+	bimap_type bimap;
+
+public:
+	explicit EnumStringMap(std::initializer_list< std::pair<E, const char *> > in) {
+		for (auto es : in)
+		{
+			bimap.insert(value_type(es.first, es.second));
+		}
+		// Sanity check that there were no
+		// duplicate mappings.
+		assert(bimap.size() == in.size());
+	}
+
+	const char *stringify(E e) {
+		auto i = bimap.left.find(e);
+		assert(i != bimap.left.end() && "Missing mapping for enumerated value");
+		return i->second.c_str();
+	}
+
+	E parse(const char *s) {
+		E e;
+		bool result = parse(s, &e);
+		assert(result && "Missing string->enum mapping");
+		return e;
+	}
+
+	bool parse(const char *s, E *e) {
+		auto i = bimap.right.find(s);
+		if (i == bimap.right.end())
+		{
+			return false;
+		}
+
+		*e = i->second;
+		return true;
+	}
+};