1 files changed, 16 insertions, 0 deletions
diff --git a/interval.h b/interval.h
new file mode 100644
index 0000000..e4a799e
--- /dev/null
+++ b/interval.h
@@ -0,0 +1,16 @@
+typedef struct Interval Interval;
+struct Interval
+{
+	uvlong t0, t1;
+	uvlong ∆t;	/* duration */
+
+	int (*before)(Interval*, Interval*);
+	int (*equals)(Interval*, Interval*);
+	int (*overlaps)(Interval*, Interval*);
+	int (*meets)(Interval*, Interval*);
+	int (*during)(Interval*, Interval*);
+	int (*intersects)(Interval*, Interval*);
+};
+
+Interval *mkinterval(uvlong, uvlong);
+void rminterval(Interval*);