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

2026-04-24 00:00:05 +08:00 · 2020-02-24 14:43:11 +03:00
parent 133b3756e6 86cc97e55f
commit 32f1555929
655 changed files with 146468 additions and 0 deletions
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+//    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) 2012-2019 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/>.
+
+
+// map/set find
+
+#pragma once
+
+#include <utility>
+
+namespace openvpn {
+  namespace MSF {
+
+    template <typename ITERATOR>
+    class Iter : public ITERATOR
+    {
+    public:
+      template <typename MAP_SET>
+      Iter(const MAP_SET& ms, ITERATOR&& iter)
+	: ITERATOR(std::move(iter)),
+	  exists_(*this != ms.end())
+      {
+      }
+
+      Iter(ITERATOR&& iter)
+	: ITERATOR(std::move(iter)),
+	  exists_(true)
+      {
+      }
+
+      explicit operator bool() const
+      {
+	return exists_;
+      }
+
+    private:
+      bool exists_;
+    };
+
+    // Like ordinary map/set find, but returns an iterator
+    // that defines an operator bool() method for testing if
+    // the iterator is defined, so instead of:
+    //
+    //   if (iter != map.end())
+    //     do_stuff();
+    //
+    // you can say:
+    //
+    //   if (iter)
+    //     do_stuff();
+    //
+    template <typename MAP_SET, typename KEY>
+    inline auto find(MAP_SET& ms, const KEY& k)
+    {
+      return Iter<decltype(ms.find(k))>(ms, ms.find(k));
+    }
+
+    // Does key exist in map/set?
+    template <typename MAP_SET, typename KEY>
+    inline bool exists(MAP_SET& ms, const KEY& k)
+    {
+      return ms.find(k) != ms.end();
+    }
+
+    // Convert an ordinary, dereferenceable iterator to an MSF::Iter
+    template <typename ITERATOR>
+    inline auto iter(ITERATOR i)
+    {
+      return Iter<ITERATOR>(std::move(i));
+    }
+  }
+}