Added logging.hpp.
diff --git a/ndn-cpp/util/logging.cpp b/ndn-cpp/util/logging.cpp
new file mode 100644
index 0000000..1ea8667
--- /dev/null
+++ b/ndn-cpp/util/logging.cpp
@@ -0,0 +1,47 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/**
+ * Copyright (C) 2013 Regents of the University of California.
+ * @author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ * @author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ * See COPYING for copyright and distribution information.
+ */
+
+#include "logging.hpp"
+
+#ifdef HAVE_LOG4CXX
+
+#include <log4cxx/logger.h>
+#include <log4cxx/basicconfigurator.h>
+#include <log4cxx/consoleappender.h>
+#include <log4cxx/patternlayout.h>
+#include <log4cxx/level.h>
+#include <log4cxx/propertyconfigurator.h>
+#include <log4cxx/defaultconfigurator.h>
+#include <log4cxx/helpers/exception.h>
+using namespace log4cxx;
+using namespace log4cxx::helpers;
+
+#include <unistd.h>
+
+void
+INIT_LOGGERS ()
+{
+ static bool configured = false;
+
+ if (configured) return;
+
+ if (access ("log4cxx.properties", R_OK)==0)
+ PropertyConfigurator::configureAndWatch ("log4cxx.properties");
+ else
+ {
+ PatternLayoutPtr layout (new PatternLayout ("%d{HH:mm:ss} %p %c{1} - %m%n"));
+ ConsoleAppenderPtr appender (new ConsoleAppender (layout));
+
+ BasicConfigurator::configure( appender );
+ Logger::getRootLogger()->setLevel (log4cxx::Level::getInfo ());
+ }
+
+ configured = true;
+}
+
+#endif