Merge commit 'e988fee1679536137b87d10e939eff5c1f27c8ab' as 'libs/libzmq'

libs/libzmq/src/ws_decoder.hpp

@@ -0,0 +1,81 @@
+/*
+    Copyright (c) 2007-2019 Contributors as noted in the AUTHORS file
+
+    This file is part of libzmq, the ZeroMQ core engine in C++.
+
+    libzmq is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    As a special exception, the Contributors give you permission to link
+    this library with independent modules to produce an executable,
+    regardless of the license terms of these independent modules, and to
+    copy and distribute the resulting executable under terms of your choice,
+    provided that you also meet, for each linked independent module, the
+    terms and conditions of the license of that module. An independent
+    module is a module which is not derived from or based on this library.
+    If you modify this library, you must extend this exception to your
+    version of the library.
+
+    libzmq 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 Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_WS_DECODER_HPP_INCLUDED__
+#define __ZMQ_WS_DECODER_HPP_INCLUDED__
+
+#include "decoder.hpp"
+#include "decoder_allocators.hpp"
+#include "ws_protocol.hpp"
+
+namespace zmq
+{
+//  Decoder for Web socket framing protocol. Converts data stream into messages.
+//  The class has to inherit from shared_message_memory_allocator because
+//  the base class calls allocate in its constructor.
+class ws_decoder_t ZMQ_FINAL
+    : public decoder_base_t<ws_decoder_t, shared_message_memory_allocator>
+{
+  public:
+    ws_decoder_t (size_t bufsize_,
+                  int64_t maxmsgsize_,
+                  bool zero_copy_,
+                  bool must_mask_);
+    ~ws_decoder_t ();
+
+    //  i_decoder interface.
+    msg_t *msg () { return &_in_progress; }
+
+  private:
+    int opcode_ready (unsigned char const *);
+    int size_first_byte_ready (unsigned char const *);
+    int short_size_ready (unsigned char const *);
+    int long_size_ready (unsigned char const *);
+    int mask_ready (unsigned char const *);
+    int flags_ready (unsigned char const *);
+    int message_ready (unsigned char const *);
+
+    int size_ready (unsigned char const *);
+
+    unsigned char _tmpbuf[8];
+    unsigned char _msg_flags;
+    msg_t _in_progress;
+
+    const bool _zero_copy;
+    const int64_t _max_msg_size;
+    const bool _must_mask;
+    uint64_t _size;
+    zmq::ws_protocol_t::opcode_t _opcode;
+    unsigned char _mask[4];
+
+    ZMQ_NON_COPYABLE_NOR_MOVABLE (ws_decoder_t)
+};
+}
+
+#endif