Rename MD5Digester -> Digester.

1 files changed, 69 insertions, 0 deletions

diff --git a/src/lib/digester.cc b/src/lib/digester.cc
new file mode 100644
index 000000000..2d25d41d1
--- /dev/null
+++ b/src/lib/digester.cc
@@ -0,0 +1,69 @@
+/*
+    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 <iomanip>
+#include <openssl/md5.h>
+#include "digester.h"
+#include "safe_stringstream.h"
+
+using std::string;
+using std::hex;
+using std::setfill;
+using std::setw;
+
+Digester::Digester ()
+{
+	MD5_Init (&_context);
+}
+
+Digester::~Digester ()
+{
+	get ();
+}
+
+void
+Digester::add (void const * data, size_t size)
+{
+	MD5_Update (&_context, data, size);
+}
+
+void
+Digester::add (string const & s)
+{
+	add (s.c_str (), s.length ());
+}
+
+string
+Digester::get () const
+{
+	if (!_digest) {
+		unsigned char digest[MD5_DIGEST_LENGTH];
+		MD5_Final (digest, &_context);
+
+		SafeStringStream s;
+		for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
+			s << hex << setfill('0') << setw(2) << ((int) digest[i]);
+		}
+
+		_digest = s.str ();
+	}
+
+	return _digest.get ();
+}