X-Git-Url: https://plomlompom.com/repos/foo.html?a=blobdiff_plain;f=src%2Fyx_uint16.h;h=f6f90a372dca46c8af4b63a17dcd1e4e3f37bcb6;hb=89c4ab4e0d6d7bb9d51d6714afae52603b465fc0;hp=2a5b3ac4095c0d0ce7beadf8777a88cf5a79da2b;hpb=022f78b4ca5a98999f5e482277b0a317af91f404;p=plomrogue
diff --git a/src/yx_uint16.h b/src/yx_uint16.h
index 2a5b3ac..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 /* for uint8_t, uint16_t */
@@ -20,19 +18,17 @@ struct yx_uint16
uint16_t x;
};
-/* Directions available for movement. */
-enum dir
-{
- NORTH = 1,
- EAST,
- SOUTH,
- WEST
-};
-/* Return 1 if two yx_uint16 coordinates 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. */
-extern struct yx_uint16 mv_yx_in_dir(enum dir d, struct yx_uint16 yx);
+/* 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 "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(char dir, struct yx_uint16 yx);
+
+
#endif