Merge commit 'e988fee1679536137b87d10e939eff5c1f27c8ab' as 'libs/libzmq'

libs/libzmq/src/raw_decoder.cpp

@@ -0,0 +1,74 @@
+/*
+    Copyright (c) 2007-2016 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/>.
+*/
+
+#include "precompiled.hpp"
+#include <stdlib.h>
+#include <string.h>
+
+#include "raw_decoder.hpp"
+#include "err.hpp"
+
+zmq::raw_decoder_t::raw_decoder_t (size_t bufsize_) : _allocator (bufsize_, 1)
+{
+    const int rc = _in_progress.init ();
+    errno_assert (rc == 0);
+}
+
+zmq::raw_decoder_t::~raw_decoder_t ()
+{
+    const int rc = _in_progress.close ();
+    errno_assert (rc == 0);
+}
+
+void zmq::raw_decoder_t::get_buffer (unsigned char **data_, size_t *size_)
+{
+    *data_ = _allocator.allocate ();
+    *size_ = _allocator.size ();
+}
+
+int zmq::raw_decoder_t::decode (const uint8_t *data_,
+                                size_t size_,
+                                size_t &bytes_used_)
+{
+    const int rc =
+      _in_progress.init (const_cast<unsigned char *> (data_), size_,
+                         shared_message_memory_allocator::call_dec_ref,
+                         _allocator.buffer (), _allocator.provide_content ());
+
+    // if the buffer serves as memory for a zero-copy message, release it
+    // and allocate a new buffer in get_buffer for the next decode
+    if (_in_progress.is_zcmsg ()) {
+        _allocator.advance_content ();
+        _allocator.release ();
+    }
+
+    errno_assert (rc != -1);
+    bytes_used_ = size_;
+    return 1;
+}