X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=src%2Fyx_uint16.c;h=c980693b998bf3156ea70e1f3f5a8df8fc36402b;hb=89c4ab4e0d6d7bb9d51d6714afae52603b465fc0;hp=afcab4db7a17d064a1faa36890576845bbd572b3;hpb=64e1bc2a874308530b7b45c33ed5d37f34f5f8be;p=plomrogue

diff --git a/src/yx_uint16.c b/src/yx_uint16.c
index afcab4d..c980693 100644
--- a/src/yx_uint16.c
+++ b/src/yx_uint16.c
@@ -1,8 +1,38 @@
-#include "stdint.h"
+/* yx_uint16.c */
+
 #include "yx_uint16.h"
+#include <stdint.h> /* for uint8_t, uint16_t */
+
+
+
+extern uint8_t yx_uint16_cmp(struct yx_uint16 * a, struct yx_uint16 * b)
+{
+    if (a->y == b->y && a->x == b->x)
+    {
+        return 1;
+    }
+    return 0;
+}
+
 
-extern char yx_uint16_cmp (struct yx_uint16 a, struct yx_uint16 b) {
-// Compare two coordinates of type yx_uint16.
-  if (a.y == b.y && a.x == b.x) return 1;
-  else                          return 0; }
 
+extern struct yx_uint16 mv_yx_in_dir(char d, struct yx_uint16 yx)
+{
+    if      (d == 'N' && yx.y > 0)
+    {
+        yx.y--;
+    }
+    else if (d == 'E' && yx.x < UINT16_MAX)
+    {
+        yx.x++;
+    }
+    else if (d == 'S' && yx.y < UINT16_MAX)
+    {
+        yx.y++;
+    }
+    else if (d == 'W' && yx.x > 0)
+    {
+        yx.x--;
+    }
+    return yx;
+}