Imported Upstream version 2.1.3upstream/2.1.3

1 files changed, 90 insertions, 0 deletions

diff --git a/src/encoder.cpp b/src/encoder.cpp
new file mode 100644
index 0000000..88e1dff
--- /dev/null
+++ b/src/encoder.cpp
@@ -0,0 +1,90 @@
+/*
+    Copyright (c) 2007-2011 iMatix Corporation
+    Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser 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
+    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 "encoder.hpp"
+#include "i_inout.hpp"
+#include "wire.hpp"
+
+zmq::encoder_t::encoder_t (size_t bufsize_) :
+    encoder_base_t <encoder_t> (bufsize_),
+    source (NULL)
+{
+    zmq_msg_init (&in_progress);
+
+    //  Write 0 bytes to the batch and go to message_ready state.
+    next_step (NULL, 0, &encoder_t::message_ready, true);
+}
+
+zmq::encoder_t::~encoder_t ()
+{
+    zmq_msg_close (&in_progress);
+}
+
+void zmq::encoder_t::set_inout (i_inout *source_)
+{
+    source = source_;
+}
+
+bool zmq::encoder_t::size_ready ()
+{
+    //  Write message body into the buffer.
+    next_step (zmq_msg_data (&in_progress), zmq_msg_size (&in_progress),
+        &encoder_t::message_ready, false);
+    return true;
+}
+
+bool zmq::encoder_t::message_ready ()
+{
+    //  Destroy content of the old message.
+    zmq_msg_close (&in_progress);
+
+    //  Read new message. If there is none, return false.
+    //  Note that new state is set only if write is successful. That way
+    //  unsuccessful write will cause retry on the next state machine
+    //  invocation.
+    if (!source || !source->read (&in_progress)) {
+        zmq_msg_init (&in_progress);
+        return false;
+    }
+
+    //  Get the message size.
+    size_t size = zmq_msg_size (&in_progress);
+
+    //  Account for the 'flags' byte.
+    size++;
+
+    //  For messages less than 255 bytes long, write one byte of message size.
+    //  For longer messages write 0xff escape character followed by 8-byte
+    //  message size. In both cases 'flags' field follows.
+    if (size < 255) {
+        tmpbuf [0] = (unsigned char) size;
+        tmpbuf [1] = (in_progress.flags & ~ZMQ_MSG_SHARED);
+        next_step (tmpbuf, 2, &encoder_t::size_ready,
+            !(in_progress.flags & ZMQ_MSG_MORE));
+    }
+    else {
+        tmpbuf [0] = 0xff;
+        put_uint64 (tmpbuf + 1, size);
+        tmpbuf [9] = (in_progress.flags & ~ZMQ_MSG_SHARED);
+        next_step (tmpbuf, 10, &encoder_t::size_ready,
+            !(in_progress.flags & ZMQ_MSG_MORE));
+    }
+    return true;
+}