-static uint8_t mv_yx_in_dir_wrap(char d, struct yx_uint8 * yx)
-{
- static int8_t wrap_west_east = 0;
- static int8_t wrap_north_south = 0;
- char * err = "Too much wrapping in mv_yx_in_dir_wrap().";
- exit_err( INT8_MIN == wrap_west_east || INT8_MIN == wrap_north_south
- || INT8_MAX == wrap_west_east || INT8_MAX == wrap_north_south, err);
- if (!yx)
- {
- wrap_west_east = wrap_north_south = 0;
- return 0;
- }
- struct yx_uint8 original;
- original.y = yx->y;
- original.x = yx->x;
- mv_yx_in_dir(d, yx);
- if (strchr("edc", d) && yx->x < original.x)
- {
- wrap_west_east++;
- }
- else if (strchr("xsw", d) && yx->x > original.x)
- {
- wrap_west_east--;
- }
- if (strchr("we", d) && yx->y > original.y)
- {
- wrap_north_south--;
- }
- else if (strchr("xc", d) && yx->y < original.y)
- {
- wrap_north_south++;
- }
- return (wrap_west_east != 0) + (wrap_north_south != 0);
-}
-
-
-