diff -r 000000000000 -r 7afb1e598abd bookloupe/counters.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bookloupe/counters.h	Sat Sep 21 23:47:52 2013 +0100
@@ -0,0 +1,17 @@
+#ifndef COUNTERS_H
+#define COUNTERS_H
+
+#include <glib.h>
+
+struct counters {
+    GTree *matching;
+    long quot;
+    int c_unders;
+};
+
+void increment_matching(struct counters *counters,gunichar ch,gboolean open);
+int matching_count(const struct counters *counters,gunichar ch,gboolean open);
+int matching_difference(const struct counters *counters,gunichar ch);
+void counters_destroy(struct counters *counters);
+
+#endif /* COUNTERS_H */