+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;
+}