--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sim/SimLog.h	Thu Apr 21 14:57:45 2011 +0100
@@ -0,0 +1,60 @@
+/*
+ *    Copyright 2007 Intel Corporation
+ * 
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+#ifndef _SIMLOG_H_
+#define _SIMLOG_H_
+
+#include <oasys/io/FileIOClient.h>
+#include <oasys/util/Singleton.h>
+#include <oasys/util/StringBuffer.h>
+
+namespace dtn {
+class Bundle;
+}
+
+using namespace dtn;
+
+namespace dtnsim {
+
+class Node;
+
+/**
+ * Class for more structured logging of bundle generation / reception.
+ */
+class SimLog : public oasys::Singleton<SimLog> {
+public:
+    SimLog();
+
+    void log_gen(Node* n, Bundle* b)     { log_entry("GEN", n, b); }
+    void log_recv(Node* n, Bundle* b)    { log_entry("RECV", n, b); }
+    void log_xmit(Node* n, Bundle* b)    { log_entry("XMIT", n, b); }
+    void log_arrive(Node* n, Bundle* b)  { log_entry("ARR", n, b); }
+    void log_dup(Node* n, Bundle* b)     { log_entry("DUP", n, b); }
+    void log_expire(Node* n, Bundle* b)  { log_entry("EXP", n, b); }
+    void log_inqueue(Node* n, Bundle* b) { log_entry("INQ", n, b); }
+
+    void flush();
+    
+protected:
+    void log_entry(const char* what, Node* n, Bundle* b);
+    
+    oasys::FileIOClient* file_;
+    oasys::StringBuffer buf_;
+};
+
+} // namespace dtnsim
+
+#endif /* _SIMLOG_H_ */