X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=src%2Fyx_uint16.h;h=f6f90a372dca46c8af4b63a17dcd1e4e3f37bcb6;hb=e9ee94eeb27e1121f8383cb6fc3775f18261df75;hp=325b22449570ca6fad0a18158a8ed07768e78bc2;hpb=2ae596eebaa801026f17ef128887c41ff75c6d66;p=plomrogue

diff --git a/src/yx_uint16.h b/src/yx_uint16.h
index 325b224..f6f90a3 100644
--- a/src/yx_uint16.h
+++ b/src/yx_uint16.h
@@ -7,8 +7,6 @@
 #ifndef YX_UINT16_H
 #define YX_UINT16_H
 
-
-
 #include <stdint.h> /* for uint8_t, uint16_t */
 
 
@@ -22,27 +20,14 @@ struct yx_uint16
 
 
 
-/* Directions available for movement. */
-enum dir
-{
-    NORTH = 1,
-    EAST,
-    SOUTH,
-    WEST
-};
-
-
-
 /* Return 1 if two yx_uint16 coordinates at "a" and "b" are equal, else 0. */
 extern uint8_t yx_uint16_cmp(struct yx_uint16 * a, struct yx_uint16 * b);
 
-
-
-/* Return yx_uint16 coordinate one step from coordinate yx in direction dir.
- *
- * If an invalid dir "d" is passed, "yx" remains unchanged.
+/* Return yx_uint16 coordinate one step from "yx" in direction "dir" (east: 'E',
+ * west: 'W', north: 'N', south: 'S'). If "dir" is invalid or would wrap the
+ * move around the edge of a 2^16x2^16 cells field, "yx" remains unchanged.
  */
-extern struct yx_uint16 mv_yx_in_dir(enum dir d, struct yx_uint16 yx);
+extern struct yx_uint16 mv_yx_in_dir(char dir, struct yx_uint16 yx);