-void save_game(struct World * world) {
-// Save game data to game file.
- FILE * file = fopen("savefile", "w");
- write_uint32_bigendian(world->seed, file);
- write_uint32_bigendian(world->turn, file);
- write_uint16_bigendian(world->player->pos.y, file);
- write_uint16_bigendian(world->player->pos.x, file);
- write_uint16_bigendian(world->monster->pos.y, file);
- write_uint16_bigendian(world->monster->pos.x, file);
- write_uint16_bigendian(world->monster->next->pos.y, file);
- write_uint16_bigendian(world->monster->next->pos.x, file);
- write_uint16_bigendian(world->monster->next->next->pos.y, file);
- write_uint16_bigendian(world->monster->next->next->pos.x, file);
- fclose(file); }
-
-void record_action (char action) {
-// Append action to game record file.
- FILE * file = fopen("record", "a");
- fputc(action, file);
- fclose(file); }
-
-struct yx_uint16 mv_yx_in_dir (char d, struct yx_uint16 yx) {
-// Return yx coordinates one step to the direction d of yx.
- if (d == NORTH) yx.y--;
- else if (d == EAST) yx.x++;
- else if (d == SOUTH) yx.y++;
- else if (d == WEST) yx.x--;
- return yx; }
+struct yx_uint16 find_passable_pos (struct Map * map) {
+// Return a random passable position on map.
+ struct yx_uint16 pos;
+ for (pos.y = pos.x = 0; 0 == is_passable(map, pos);) {
+ pos.y = rrand(0, 0) % map->size.y;
+ pos.x = rrand(0, 0) % map->size.x; }
+ return pos; }