1 files changed, 17 insertions, 0 deletions
diff --git a/include/ballistics.h b/include/ballistics.h
index ab68c3f..7ba4248 100644
--- a/include/ballistics.h
+++ b/include/ballistics.h
@@ -19,4 +19,21 @@ double retard(DragFunction drag_function,
 			  double velocity,
 			  double temperature);
 
+typedef struct RangeCardRecord RangeCardRecord;
+struct RangeCardRecord {
+	size_t n;
+	double range;
+	double elevation;
+	Windage windage;
+	double lead;
+	double time_of_flight;
+	double bullet_speed;
+	double kinetic_energy;
+};
+typedef struct RangeCard RangeCard;
+struct RangeCard {
+	RangeCardRecord *card;
+	size_t records;
+};
+
 #endif