Checkpoint. Reorganizing ccnb parsing into many small files.
diff --git a/helper/ccnb-parser/syntax-tree/ccnb-parser-dtag.cc b/helper/ccnb-parser/syntax-tree/ccnb-parser-dtag.cc
new file mode 100644
index 0000000..0cfe4bd
--- /dev/null
+++ b/helper/ccnb-parser/syntax-tree/ccnb-parser-dtag.cc
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2011 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#include "ccnb-parser-dtag.h"
+#include "ns3/ccnb-parser-common.h"
+
+namespace ns3 {
+namespace CcnbParser {
+
+Dtag::Dtag (Buffer::Iterator &start, uint32_t dtag)
+{
+ m_dtag = dtag;
+
+ /**
+ * Hack
+ *
+ * Stop processing after encountering <Content> dtag. Actual
+ * content (including virtual payload) will be stored in Packet
+ * buffer
+ */
+ if (dtag == Ccnx::CCN_DTAG_Content)
+ return; // hack #1. Do not process nesting block for <Content>
+
+ // parse attributes until first nested block reached
+ while (!start.IsEnd () && start.PeekU8 ()!=CCN_CLOSE)
+ {
+ Ptr<Block> block = Block::ParseBlock (start);
+ if (DynamicCast<BaseAttr> (block)!=0)
+ m_attrs.push_back (block);
+ else
+ {
+ m_nestedTags.push_back (block);
+ break;
+ }
+ }
+
+ // parse the rest of nested blocks
+ while (!start.IsEnd () && start.PeekU8 ()!=CCN_CLOSE)
+ {
+ // hack #2. Stop processing nested blocks if last block was <Content>
+ if (m_dtag == Ccnx::CCN_DTAG_ContentObject && // we are in <ContentObject>
+ DynamicCast<Dtag> (m_nestedBlocks.back())!=0 && // last block is DTAG
+ DynamicCast<Dtag> (m_nestedBlocks.back())->m_dtag == CCN_DTAG_Content)
+ {
+ return;
+ }
+
+ m_nestedBlocks.push_back (Block::ParseBlock (start));
+ }
+ if (start.IsEnd ())
+ throw CcnxDecodingException ();
+
+ start.ReadU8 (); // read CCN_CLOSE
+}
+
+}
+}