X-Git-Url: https://plomlompom.com/repos/foo.html?a=blobdiff_plain;ds=sidebyside;f=src%2Fyx_uint16.h;h=325b22449570ca6fad0a18158a8ed07768e78bc2;hb=f89a93a290b7b6bddb442709b58e4fdb10a3e378;hp=e5249b0ab3ca4e69685fc7a845209fb963af9760;hpb=289154889af25ebb05f5ad1149cafd8e82b0b0fa;p=plomrogue
diff --git a/src/yx_uint16.h b/src/yx_uint16.h
index e5249b0..325b224 100644
--- a/src/yx_uint16.h
+++ b/src/yx_uint16.h
@@ -20,6 +20,8 @@ struct yx_uint16
uint16_t x;
};
+
+
/* Directions available for movement. */
enum dir
{
@@ -29,10 +31,19 @@ enum dir
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. */
+
+
+/* Return yx_uint16 coordinate one step from coordinate yx in direction dir.
+ *
+ * If an invalid dir "d" is passed, "yx" remains unchanged.
+ */
extern struct yx_uint16 mv_yx_in_dir(enum dir d, struct yx_uint16 yx);
+
+
#endif