-void update_log (struct World * world, char * text) {
-// Update log with new text to be appended.
- char * new_text;
- uint16_t len_old = strlen(world->log);
- uint16_t len_new = strlen(text);
- uint16_t len_whole = len_old + len_new + 1;
- new_text = calloc(len_whole, sizeof(char));
- memcpy(new_text, world->log, len_old);
- memcpy(new_text + len_old, text, len_new);
- free(world->log);
- world->log = new_text; }
-
-void move_monster (struct World * world, struct Monster * monster) {
-// Move monster in random direction, trigger fighting when hindered by player/monster.
- char d = rrand(0, 0) % 5;
- struct yx_uint16 t = mv_yx_in_dir (d, monster->pos);
- if (yx_uint16_cmp (t, world->player->pos)) {
- update_log (world, "\nThe monster hits you.");
- return; }
- char met_monster = 0;
- struct Monster * other_monster;
- for (other_monster = world->monster; other_monster != 0; other_monster = other_monster->next) {
- if (other_monster == monster)
- continue;
- if (yx_uint16_cmp (t, other_monster->pos)) {
- met_monster = 1;
- break; } }
- if (met_monster)
- update_log (world, "\nMonster hits monster.");
- else if (0 == met_monster && is_passable(world->map, t.y, t.x))
- monster->pos = t; }
-
-void move_player (struct World * world, char d) {
-// Move player in direction d, increment turn counter and update log.
- static char prev = 0;
- char success = 0;
- char * dir;
- struct yx_uint16 t = mv_yx_in_dir (d, world->player->pos);
+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);