1 files changed, 46 insertions, 0 deletions
diff --git a/src/lib/digester.h b/src/lib/digester.h
new file mode 100644
index 000000000..92eb5faa3
--- /dev/null
+++ b/src/lib/digester.h
@@ -0,0 +1,46 @@
+/*
+    Copyright (C) 2014-2016 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include <openssl/md5.h>
+#include <boost/noncopyable.hpp>
+#include <boost/optional.hpp>
+#include <string>
+
+class Digester : public boost::noncopyable
+{
+public:
+	Digester ();
+	~Digester ();
+
+	void add (void const * data, size_t size);
+
+	template <class T>
+	void add (T data) {
+		add (&data, sizeof (T));
+	}
+
+	void add (std::string const & s);
+
+	std::string get () const;
+
+private:
+	mutable MD5_CTX _context;
+	mutable boost::optional<std::string> _digest;
+};