1 files changed, 78 insertions, 0 deletions
diff --git a/src/zmq_decoder.cpp b/src/zmq_decoder.cpp
new file mode 100644
index 0000000..46e4752
--- /dev/null
+++ b/src/zmq_decoder.cpp
@@ -0,0 +1,78 @@
+/*
+    Copyright (c) 2007-2009 FastMQ Inc.
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the Lesser GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ 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
+    Lesser GNU General Public License for more details.
+
+    You should have received a copy of the Lesser GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "zmq_decoder.hpp"
+#include "i_session.hpp"
+#include "wire.hpp"
+
+zs::zmq_decoder_t::zmq_decoder_t () :
+    destination (NULL)
+{
+    zs_msg_init (&in_progress);
+
+    //  At the beginning, read one byte and go to one_byte_size_ready state.
+    next_step (tmpbuf, 1, &zmq_decoder_t::one_byte_size_ready);
+}
+
+zs::zmq_decoder_t::~zmq_decoder_t ()
+{
+    zs_msg_close (&in_progress);
+}
+
+void zs::zmq_decoder_t::set_session (i_session *destination_)
+{
+    destination = destination_;
+}
+
+bool zs::zmq_decoder_t::one_byte_size_ready ()
+{
+    //  First byte of size is read. If it is 0xff read 8-byte size.
+    //  Otherwise allocate the buffer for message data and read the
+    //  message data into it.
+    if (*tmpbuf == 0xff)
+        next_step (tmpbuf, 8, &zmq_decoder_t::eight_byte_size_ready);
+    else {
+        zs_msg_init_size (&in_progress, *tmpbuf);
+        next_step (zs_msg_data (&in_progress), *tmpbuf,
+            &zmq_decoder_t::message_ready);
+    }
+    return true;
+}
+
+bool zs::zmq_decoder_t::eight_byte_size_ready ()
+{
+    //  8-byte size is read. Allocate the buffer for message body and
+    //  read the message data into it.
+    size_t size = (size_t) get_uint64 (tmpbuf);
+    zs_msg_init_size (&in_progress, size);
+    next_step (zs_msg_data (&in_progress), size, &zmq_decoder_t::message_ready);
+    return true;
+}
+
+bool zs::zmq_decoder_t::message_ready ()
+{
+    //  Message is completely read. Push it further and start reading
+    //  new message.
+    if (!destination->write (&in_progress))
+        return false;
+
+    next_step (tmpbuf, 1, &zmq_decoder_t::one_byte_size_ready);
+    return true;
+}
+