✨ A1

A1/coord_query.h

@@ -0,0 +1,16 @@
+// Similar to id_query.h.  See the comments there.
+
+#ifndef COORD_QUERY_LOOP_H
+#define COORD_QUERY_LOOP_H
+
+#include "record.h"
+
+typedef void* (*mk_index_fn)(const struct record*, int);
+
+typedef void (*free_index_fn)(void*);
+
+typedef const struct record* (*lookup_fn)(void*, double, double);
+
+int coord_query_loop(int argc, char** argv, mk_index_fn, free_index_fn, lookup_fn);
+
+#endif