--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/stat.h	Wed Jan 22 12:10:17 2014 +0100
@@ -0,0 +1,27 @@
+#ifndef __STAT_H__
+#define __STAT_H__
+
+struct stat {
+	int samples;
+	double mean;
+	double slope;
+	double previous;
+};
+
+void stat_zero(struct stat *s);
+void stat_accumulate(struct stat *s, double value);
+
+#define ROLLMEAN_N_OBS 10
+
+struct rollmean {
+	int wlen;
+	int nobs;
+	double mean;
+	double acc;
+	double prev;
+};
+
+void rollmean_zero(struct rollmean *s, int wlen);
+void rollmean_accumulate(struct rollmean *s, double value);
+
+#endif