ccnx: small reorganization and extension

Change-Id: I231e1e7e390d19b8e951b9ca4cf52480e10916bc
diff --git a/ccnx/ccnx-charbuf.h b/ccnx/ccnx-charbuf.h
new file mode 100644
index 0000000..fbb9588
--- /dev/null
+++ b/ccnx/ccnx-charbuf.h
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2012-2013 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: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ *	   Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef CCNX_CCNX_CHARBUF_H
+#define CCNX_CCNX_CHARBUF_H
+
+#include "ccnx-common.h"
+#include <boost/shared_ptr.hpp>
+
+namespace Ccnx {
+
+class CcnxCharbuf;
+typedef boost::shared_ptr<CcnxCharbuf> CcnxCharbufPtr;
+
+//  This class is mostly used in CcnxWrapper; users should not be directly using this class
+// The main purpose of this class to is avoid manually create and destroy charbuf everytime
+class CcnxCharbuf
+{
+public:
+  CcnxCharbuf();
+  CcnxCharbuf(ccn_charbuf *buf);
+  CcnxCharbuf(const CcnxCharbuf &other);
+  CcnxCharbuf(const void *buf, size_t length);
+  ~CcnxCharbuf();
+
+  // expose internal data structure, use with caution!!
+  ccn_charbuf *
+  getBuf() { return m_buf; }
+
+  const ccn_charbuf *
+  getBuf() const { return m_buf; }
+
+  const unsigned char *
+  buf () const
+  { return m_buf->buf; }
+
+  size_t
+  length () const
+  { return m_buf->length; }
+
+private:
+  void init(ccn_charbuf *buf);
+
+protected:
+  ccn_charbuf *m_buf;
+};
+
+}
+
+#endif // CCNX_CCNX_CHARBUF_H