1 files changed, 91 insertions, 0 deletions
diff --git a/epan/timestats.c b/epan/timestats.c
new file mode 100644
index 00000000..3f4cfb9b
--- /dev/null
+++ b/epan/timestats.c
@@ -0,0 +1,91 @@
+/* timestats.c
+ * routines for time statistics
+ * Copyright 2003 Lars Roland
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include "timestats.h"
+
+/* Initialize a timestat_t struct */
+void
+time_stat_init(timestat_t *stats)
+{
+	stats->num = 0;
+	stats->min_num = 0;
+	stats->max_num = 0;
+	nstime_set_zero(&stats->min);
+	nstime_set_zero(&stats->max);
+	nstime_set_zero(&stats->tot);
+	stats->variance = 0.0;
+}
+
+/* Update a timestat_t struct with a new sample */
+void
+time_stat_update(timestat_t *stats, const nstime_t *delta, packet_info *pinfo)
+{
+	if(stats->num==0){
+		stats->max=*delta;
+		stats->max_num=pinfo->num;
+		stats->min=*delta;
+		stats->min_num=pinfo->num;
+	}
+
+	if( (delta->secs<stats->min.secs)
+	||( (delta->secs==stats->min.secs)
+	  &&(delta->nsecs<stats->min.nsecs) ) ){
+		stats->min=*delta;
+		stats->min_num=pinfo->num;
+	}
+
+	if( (delta->secs>stats->max.secs)
+	||( (delta->secs==stats->max.secs)
+	  &&(delta->nsecs>stats->max.nsecs) ) ){
+		stats->max=*delta;
+		stats->max_num=pinfo->num;
+	}
+
+	nstime_add(&stats->tot, delta);
+
+	stats->num++;
+}
+
+/*
+ * get_average - function
+ *
+ * function to calculate the average
+ * returns the average as a gdouble , time base is milli seconds
+ */
+
+gdouble get_average(const nstime_t *sum, guint32 num)
+{
+	gdouble average;
+
+	if(num > 0) {
+		average = (double)sum->secs*1000 + (double)sum->nsecs/1000000;
+		average /= num;
+	}
+	else {
+		average = 0;
+	}
+	return average;
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 noexpandtab:
+ * :indentSize=8:tabSize=8:noTabs=false:
+ */