Debugging colored, cool

FossilOrigin-Name: b62ab94004ae914a6c042383ef399141a1a82e49408b6ae3b1422ba3c72733b1

src/cw/cw_clock_lap.c

@@ -0,0 +1,13 @@
+#include "timer.h"
+
+/**
+ * Get lap time. (stop watch)
+ * @param tv pointer to a clock variable defined with #CW_CLOCK_DEFINE
+ * @return lap time in seconds.
+ */
+double cw_clock_lap(struct timeval *tv)
+{
+	struct timeval lap;
+	gettimeofday(&lap, NULL);
+	return (cw_timevaltodouble(&lap) - cw_timevaltodouble(tv)) / 1000000.0;
+}