10 #include "keybindings.h"
11 #include "readwrite.h"
13 uint16_t rrand(char use_seed, uint32_t new_seed) {
14 // Pseudo-random number generator (LGC algorithm). Use instead of rand() to ensure portable predictability.
18 seed = ((seed * 1103515245) + 12345) % 2147483648; // Values as recommended by POSIX.1-2001 (see rand(3)).
19 return (seed / 65536); } // Ignore least significant 16 bits (they are less random).
21 void update_log (struct World * world, char * text) {
22 // Update log with new text to be appended.
24 uint16_t len_old = strlen(world->log);
25 uint16_t len_new = strlen(text);
26 uint16_t len_whole = len_old + len_new + 1;
27 new_text = calloc(len_whole, sizeof(char));
28 memcpy(new_text, world->log, len_old);
29 memcpy(new_text + len_old, text, len_new);
31 world->log = new_text; }
33 struct Map init_map () {
34 // Initialize map with some experimental start values.
40 uint32_t size = map.size.x * map.size.y;
41 map.cells = malloc(size);
43 for (y = 0; y < map.size.y; y++)
44 for (x = 0; x < map.size.x; x++)
45 map.cells[(y * map.size.x) + x] = '~';
46 map.cells[size / 2 + (map.size.x / 2)] = '.';
47 uint32_t repeats, root, curpos;
48 for (root = 0; root * root * root < size; root++);
49 for (repeats = 0; repeats < size * root; repeats++) {
50 y = rrand(0, 0) % map.size.y;
51 x = rrand(0, 0) % map.size.x;
52 curpos = y * map.size.x + x;
53 if ('~' == map.cells[curpos] &&
54 ( (curpos >= map.size.x && '.' == map.cells[curpos - map.size.x])
55 || (curpos < map.size.x * (map.size.y-1) && '.' == map.cells[curpos + map.size.x])
56 || (curpos > 0 && curpos % map.size.x != 0 && '.' == map.cells[curpos-1])
57 || (curpos < (map.size.x * map.size.y) && (curpos+1) % map.size.x != 0 && '.' == map.cells[curpos+1])))
58 map.cells[y * map.size.x + x] = '.'; }
61 void map_scroll (struct Map * map, char dir) {
62 // Scroll map into direction dir if possible by changing the offset.
63 if (NORTH == dir && map->offset.y > 0) map->offset.y--;
64 else if (SOUTH == dir) map->offset.y++;
65 else if (WEST == dir && map->offset.x > 0) map->offset.x--;
66 else if (EAST == dir) map->offset.x++; }
68 void turn_over (struct World * world, char action) {
69 // Record action in game record file, increment turn and move enemy.
70 if (1 == world->interactive) {
71 FILE * file = fopen("record", "a");
75 rrand(1, world->seed * world->turn);
76 struct Monster * monster;
77 for (monster = world->monster; monster != 0; monster = monster->next)
78 move_monster(world, monster); }
80 void save_game(struct World * world) {
81 // Save game data to game file.
82 FILE * file = fopen("savefile", "w");
83 write_uint32_bigendian(world->seed, file);
84 write_uint32_bigendian(world->turn, file);
85 write_uint16_bigendian(world->player->pos.y, file);
86 write_uint16_bigendian(world->player->pos.x, file);
87 write_uint16_bigendian(world->monster->pos.y, file);
88 write_uint16_bigendian(world->monster->pos.x, file);
89 write_uint16_bigendian(world->monster->next->pos.y, file);
90 write_uint16_bigendian(world->monster->next->pos.x, file);
91 write_uint16_bigendian(world->monster->next->next->pos.y, file);
92 write_uint16_bigendian(world->monster->next->next->pos.x, file);
95 char is_passable (struct Map * map, uint16_t y, uint16_t x) {
96 // Check if coordinate on (or beyond) map is accessible to movement.
98 if (0 <= x && x < map->size.x && 0 <= y && y < map->size.y)
99 if ('.' == map->cells[y * map->size.x + x])
103 void move_monster (struct World * world, struct Monster * monster) {
104 // Move monster in random direction, trigger fighting when hindered by player/monster.
105 char d = rrand(0, 0) % 5;
106 struct yx_uint16 t = mv_yx_in_dir (d, monster->pos);
107 if (yx_uint16_cmp (t, world->player->pos)) {
108 update_log (world, "\nThe monster hits you.");
110 struct Monster * other_monster;
111 for (other_monster = world->monster; other_monster != 0; other_monster = other_monster->next) {
112 if (other_monster == monster)
114 if (yx_uint16_cmp (t, other_monster->pos)) {
115 update_log (world, "\nMonster hits monster.");
117 if (is_passable(world->map, t.y, t.x))
120 void move_player (struct World * world, char d) {
121 // Move player in direction d, increment turn counter and update log.
122 struct yx_uint16 t = mv_yx_in_dir (d, world->player->pos);
123 struct Monster * monster;
124 for (monster = world->monster; monster != 0; monster = monster->next)
125 if (yx_uint16_cmp (t, monster->pos)) {
126 update_log (world, "\nYou hit the monster.");
127 turn_over (world, d);
129 char * msg = calloc(25, sizeof(char));
130 char * msg_content = "You fail to move";
132 if (NORTH == d) dir = "north";
133 else if (EAST == d) dir = "east" ;
134 else if (SOUTH == d) dir = "south";
135 else if (WEST == d) dir = "west" ;
136 if (is_passable(world->map, t.y, t.x)) {
137 msg_content = "You move";
138 world->player->pos = t; }
139 sprintf(msg, "\n%s %s.", msg_content, dir);
140 update_log (world, msg);
142 turn_over (world, d); }
144 void player_wait (struct World * world) {
145 // Make player wait one turn.
146 update_log (world, "\nYou wait.");
147 turn_over (world, 0); }
149 void toggle_window (struct WinMeta * win_meta, struct Win * win) {
150 // Toggle display of window win.
151 if (0 != win->frame.curses_win)
152 suspend_win(win_meta, win);
154 append_win(win_meta, win); }
156 void scroll_pad (struct WinMeta * win_meta, char dir) {
157 // Try to scroll pad left or right.
159 reset_pad_offset(win_meta, win_meta->pad_offset + 1);
161 reset_pad_offset(win_meta, win_meta->pad_offset - 1); }
163 void growshrink_active_window (struct WinMeta * win_meta, char change) {
164 // Grow or shrink active window horizontally or vertically by one cell size.
165 if (0 != win_meta->active) {
166 uint16_t height = win_meta->active->frame.size.y;
167 uint16_t width = win_meta->active->frame.size.x;
170 else if (change == '+')
172 else if (change == '_')
174 else if (change == '*')
176 resize_active_win (win_meta, height, width); } }
178 unsigned char meta_keys(int key, struct World * world, struct WinMeta * win_meta, struct Win * win_keys,
179 struct Win * win_map, struct Win * win_info, struct Win * win_log) {
180 // Call some meta program / window management actions dependent on key. Return 1 to signal quitting.
181 if (key == get_action_key(world->keybindings, "quit"))
183 else if (key == get_action_key(world->keybindings, "scroll pad right"))
184 scroll_pad (win_meta, '+');
185 else if (key == get_action_key(world->keybindings, "scroll pad left"))
186 scroll_pad (win_meta, '-');
187 else if (key == get_action_key(world->keybindings, "toggle keys window"))
188 toggle_window(win_meta, win_keys);
189 else if (key == get_action_key(world->keybindings, "toggle map window"))
190 toggle_window(win_meta, win_map);
191 else if (key == get_action_key(world->keybindings, "toggle info window"))
192 toggle_window(win_meta, win_info);
193 else if (key == get_action_key(world->keybindings, "toggle log window"))
194 toggle_window(win_meta, win_log);
195 else if (key == get_action_key(world->keybindings, "cycle forwards"))
196 cycle_active_win(win_meta, 'n');
197 else if (key == get_action_key(world->keybindings, "cycle backwards"))
198 cycle_active_win(win_meta, 'p');
199 else if (key == get_action_key(world->keybindings, "shift forwards"))
200 shift_active_win(win_meta, 'f');
201 else if (key == get_action_key(world->keybindings, "shift backwards"))
202 shift_active_win(win_meta, 'b');
203 else if (key == get_action_key(world->keybindings, "grow horizontally"))
204 growshrink_active_window(win_meta, '*');
205 else if (key == get_action_key(world->keybindings, "shrink horizontally"))
206 growshrink_active_window(win_meta, '_');
207 else if (key == get_action_key(world->keybindings, "grow vertically"))
208 growshrink_active_window(win_meta, '+');
209 else if (key == get_action_key(world->keybindings, "shrink vertically"))
210 growshrink_active_window(win_meta, '-');
211 else if (key == get_action_key(world->keybindings, "save keys"))
212 save_keybindings(world);
213 else if (key == get_action_key(world->keybindings, "keys nav up"))
214 keyswin_move_selection (world, 'u');
215 else if (key == get_action_key(world->keybindings, "keys nav down"))
216 keyswin_move_selection (world, 'd');
217 else if (key == get_action_key(world->keybindings, "keys mod"))
218 keyswin_mod_key (world, win_meta);
219 else if (key == get_action_key(world->keybindings, "map up"))
220 map_scroll (world->map, NORTH);
221 else if (key == get_action_key(world->keybindings, "map down"))
222 map_scroll (world->map, SOUTH);
223 else if (key == get_action_key(world->keybindings, "map right"))
224 map_scroll (world->map, EAST);
225 else if (key == get_action_key(world->keybindings, "map left"))
226 map_scroll (world->map, WEST);
229 int main (int argc, char *argv[]) {
232 // Read in startup options (i.e. replay option and replay start turn).
235 world.interactive = 1;
236 while ((opt = getopt(argc, argv, "s::")) != -1) {
239 world.interactive = 0;
242 start_turn = atoi(optarg);
245 exit(EXIT_FAILURE); } }
247 // Initialize log, player and monsters.
248 world.log = calloc(1, sizeof(char));
249 update_log (&world, " ");
250 struct Player player;
251 world.player = &player;
252 struct Monster monster1;
253 struct Monster monster2;
254 struct Monster monster3;
255 world.monster = &monster1;
256 monster1.next = &monster2;
257 monster2.next = &monster3;
263 // For interactive mode, try to load world state from savefile.
265 if (1 == world.interactive && 0 == access("savefile", F_OK)) {
266 file = fopen("savefile", "r");
267 world.seed = read_uint32_bigendian(file);
268 world.turn = read_uint32_bigendian(file);
269 player.pos.y = read_uint16_bigendian(file);
270 player.pos.x = read_uint16_bigendian(file);
271 monster1.pos.y = read_uint16_bigendian(file);
272 monster1.pos.x = read_uint16_bigendian(file);
273 monster2.pos.y = read_uint16_bigendian(file);
274 monster2.pos.x = read_uint16_bigendian(file);
275 monster3.pos.y = read_uint16_bigendian(file);
276 monster3.pos.x = read_uint16_bigendian(file);
279 // For non-interactive mode, try to load world state from frecord file.
282 if (0 == world.interactive) {
283 file = fopen("record", "r");
284 world.seed = read_uint32_bigendian(file); }
286 // For interactive-mode in newly started world, generate a start seed from the current time.
288 file = fopen("record", "w");
289 world.seed = time(NULL);
290 write_uint32_bigendian(world.seed, file);
293 // Generate map from seed and, if newly generated world, start positions of actors.
294 rrand(1, world.seed);
295 struct Map map = init_map();
297 if (1 == world.turn) {
298 for (player.pos.y = player.pos.x = 0; 0 == is_passable(&map, player.pos.y, player.pos.x);) {
299 player.pos.y = rrand(0, 0) % map.size.y;
300 player.pos.x = rrand(0, 0) % map.size.x; }
301 struct Monster * monster;
302 for (monster = world.monster; monster != 0; monster = monster->next)
303 for (monster->pos.y = monster->pos.x = 0; 0 == is_passable(&map, monster->pos.y, monster->pos.x);) {
304 monster->pos.y = rrand(0, 0) % map.size.y;
305 monster->pos.x = rrand(0, 0) % map.size.x; } }
307 // Initialize window system and windows.
308 WINDOW * screen = initscr();
311 keypad(screen, TRUE);
313 init_keybindings(&world);
314 struct WinMeta win_meta = init_win_meta(screen);
315 struct Win win_keys = init_win(&win_meta, "Keys", &world, draw_keys_win);
316 struct Win win_map = init_win(&win_meta, "Map", &world, draw_map_win);
317 struct Win win_info = init_win(&win_meta, "Info", &world, draw_info_win);
318 struct Win win_log = init_win(&win_meta, "Log", &world, draw_log_win);
319 win_keys.frame.size.x = 29;
320 win_map.frame.size.x = win_meta.pad.size.x - win_keys.frame.size.x - win_log.frame.size.x - 2;
321 win_info.frame.size.y = 1;
322 win_log.frame.size.y = win_meta.pad.size.y - 3;
323 toggle_window(&win_meta, &win_keys);
324 toggle_window(&win_meta, &win_map);
325 toggle_window(&win_meta, &win_info);
326 toggle_window(&win_meta, &win_log);
330 unsigned char quit_called = 0;
331 if (0 == world.interactive) {
332 unsigned char still_reading_file = 1;
335 if (start_turn == world.turn)
337 if (0 == start_turn) {
338 draw_all_wins (&win_meta);
340 if (1 == still_reading_file &&
341 (world.turn < start_turn || key == get_action_key(world.keybindings, "wait / next turn")) ) {
345 still_reading_file = 0; }
346 else if (0 == action)
347 player_wait (&world);
348 else if (NORTH == action)
349 move_player(&world, NORTH);
350 else if (EAST == action)
351 move_player(&world, EAST);
352 else if (SOUTH == action)
353 move_player(&world, SOUTH);
354 else if (WEST == action)
355 move_player(&world, WEST); }
357 quit_called = meta_keys(key, &world, &win_meta, &win_keys, &win_map, &win_info, &win_log);
358 if (1 == quit_called)
363 uint32_t last_turn = 0;
365 if (last_turn != world.turn) {
367 last_turn = world.turn; }
368 draw_all_wins (&win_meta);
370 if (key == get_action_key(world.keybindings, "player up"))
371 move_player(&world, NORTH);
372 else if (key == get_action_key(world.keybindings, "player right"))
373 move_player(&world, EAST);
374 else if (key == get_action_key(world.keybindings, "player down"))
375 move_player(&world, SOUTH);
376 else if (key == get_action_key(world.keybindings, "player left"))
377 move_player(&world, WEST);
378 else if (key == get_action_key(world.keybindings, "wait / next turn"))
379 player_wait (&world);
381 quit_called = meta_keys(key, &world, &win_meta, &win_keys, &win_map, &win_info, &win_log);
382 if (1 == quit_called)
385 // Clean up and exit.
387 for (key = 0; key <= world.keyswindata->max; key++)
388 free(world.keybindings[key].name);
389 free(world.keybindings);
390 free(world.keyswindata);