Merge commit '86cc97e55fe346502462284d2e636a2b3708163e' as 'Sources/OpenVPN3'

Sources/OpenVPN3/openvpn/common/endian.hpp

@@ -0,0 +1,82 @@
+//    OpenVPN -- An application to securely tunnel IP networks
+//               over a single port, with support for SSL/TLS-based
+//               session authentication and key exchange,
+//               packet encryption, packet authentication, and
+//               packet compression.
+//
+//    Copyright (C) 2012-2017 OpenVPN Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License Version 3
+//    as published by the Free Software Foundation.
+//
+//    This program 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 Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <openvpn/common/endian_platform.hpp>
+
+namespace openvpn {
+  namespace Endian {
+#   if defined(OPENVPN_LITTLE_ENDIAN)
+    inline size_t e16(const size_t v)
+    {
+      return v;
+    }
+    inline size_t e16rev(const size_t v)
+    {
+      return 15-v;
+    }
+    inline size_t e4(const size_t v)
+    {
+      return v;
+    }
+    inline size_t e4rev(const size_t v)
+    {
+      return 3-v;
+    }
+    inline size_t e2(const size_t v)
+    {
+      return v;
+    }
+    inline size_t e2rev(const size_t v)
+    {
+      return 1-v;
+    }
+#   elif defined(OPENVPN_BIG_ENDIAN)
+    inline size_t e16rev(const size_t v)
+    {
+      return v;
+    }
+    inline size_t e16(const size_t v)
+    {
+      return 15-v;
+    }
+    inline size_t e4rev(const size_t v)
+    {
+      return v;
+    }
+    inline size_t e4(const size_t v)
+    {
+      return 3-v;
+    }
+    inline size_t e2rev(const size_t v)
+    {
+      return v;
+    }
+    inline size_t e2(const size_t v)
+    {
+      return 1-v;
+    }
+#   else
+#   error One of OPENVPN_LITTLE_ENDIAN or OPENVPN_BIG_ENDIAN must be defined
+#   endif
+  }
+} // namespace openvpn