--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sim/SimLog.cc	Thu Apr 21 14:57:45 2011 +0100
@@ -0,0 +1,73 @@
+/*
+ *    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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <dtn-config.h>
+#endif
+
+#include <oasys/io/FileIOClient.h>
+#include "bundling/Bundle.h"
+#include "Node.h"
+#include "SimLog.h"
+#include "Simulator.h"
+
+namespace dtnsim {
+
+template <>
+SimLog* oasys::Singleton<SimLog>::instance_ = NULL;
+
+
+//----------------------------------------------------------------------
+SimLog::SimLog()
+{
+    file_ = new oasys::FileIOClient();
+    int err = 0;
+    if (file_->open("./dtnsim_log.txt",
+                    O_CREAT | O_RDWR | O_TRUNC, 0644, &err) < 0) {
+        log_crit_p("/dtn/sim/log",
+                   "ERROR opening sim log file: %s", strerror(err));
+    }
+}
+
+//----------------------------------------------------------------------
+void
+SimLog::flush()
+{
+    file_->close();
+}
+
+//----------------------------------------------------------------------
+void
+SimLog::log_entry(const char* what, Node* node, Bundle* bundle)
+{
+    u_int64_t now = BundleTimestamp::get_current_time();
+
+    buf_.appendf("%f\t%s\t%s\t%s\t%s\t%llu,%llu\t%zu\t%llu\n",
+                 Simulator::time(),
+                 node->name(),
+                 what,
+                 bundle->source().c_str(),
+                 bundle->dest().c_str(),
+                 bundle->creation_ts().seconds_,
+                 bundle->creation_ts().seqno_,
+                 bundle->payload().length(),
+                 now - bundle->creation_ts().seconds_);
+
+    file_->write(buf_.data(), buf_.length());
+    buf_.trim(buf_.length());
+}
+
+} // namespace dtnsim