3 #define _POSIX_C_SOURCE 199309L
5 #include <errno.h> /* global errno */
6 #include <limits.h> /* PIPE_BUF */
7 #include <stddef.h> /* size_t, NULL */
8 #include <stdint.h> /* uint8_t, uint16_t, uint32_t, UINT8_MAX */
9 #include <stdio.h> /* defines EOF, FILE, sprintf(), fprintf() */
10 #include <stdlib.h> /* free() */
11 #include <string.h> /* strlen(), snprintf(), memcpy(), memset(), strchr() */
12 #include <sys/types.h> /* time_t */
13 #include <time.h> /* time(), nanosleep() */
14 #include "../common/readwrite.h" /* atomic_write_start(), atomic_write_finish(),
15 * try_fwrite(), try_fputc(), try_fgetc()
17 #include "../common/rexit.h" /* exit_trouble() */
18 #include "../common/try_malloc.h" /* try_malloc() */
19 #include "cleanup.h" /* set_cleanup_flag() */
20 #include "field_of_view.h" /* VISIBLE */
21 #include "hardcoded_strings.h" /* s */
22 #include "things.h" /* Thing, ThingType, ThingAction, get_thing_type(),
25 #include "world.h" /* global world */
29 /* Helpers to write lines of god commands to recreate thing "t". */
30 static void write_key_space(FILE * file, char * key);
31 static void write_value(FILE * file, uint32_t value);
32 static void write_string(FILE * file, char * string);
33 static void write_key_space_value(FILE * file, char * key, uint32_t value);
34 static void write_key_space_string(FILE * file, char * key, char * string);
36 /* Write to "file" \n-delimited line of "key" + space + "value" as string. */
37 static void write_thing(FILE * file, struct Thing * t);
39 /* Cut out and return first \0-terminated string from world.queue and
40 * appropriately reduce world.queue_size. Return NULL if queue is empty.
41 * Superfluous \0 bytes after the string are also cut out. Should the queue
42 * start with \0 bytes, those are cut out, but NULL is returned instead of "".
44 static char * get_message_from_queue();
46 /* Poll input file for world.queue input. Wait a few seconds until giving up;
47 * poll only every 0.03 seconds.. Translate '\n' chars in input file into '\0'.
49 static void read_file_into_queue();
51 /* Write world state as visible to clients to its file. Write single dot line to
52 * server output file to satisfy client ping mechanisms.
54 static void update_worldstate_file();
56 /* Write "value" to new \n-delimited line of "file". */
57 static void write_value_as_line(uint32_t value, FILE * file);
59 /* Write to "file" player's inventory, one item name per line. End in "%\n". */
60 static void write_inventory(struct Thing * player, FILE * file);
62 /* Return map cells sequence as visible to the "player", with invisible cells as
63 * whitespace. Super-impose over visible map cells things positioned there.
65 static char * build_visible_map(struct Thing * player);
67 /* Write to "file" game map as visible to "player" right now, as drawn by
68 * build_visible_map(), and thereafter game map as memorized by player in its
69 * .mem_map. Write one row per \n-delimited line.
71 static void write_map(struct Thing * player, FILE * file);
75 static void write_key_space(FILE * file, char * key)
77 try_fwrite(key, strlen(key), 1, file, __func__);
78 try_fputc(' ', file, __func__);
83 static void write_value(FILE * file, uint32_t value)
85 char * line = try_malloc(11, __func__);
86 exit_trouble(-1 == sprintf(line, "%u", value), __func__, s[S_FCN_SPRINTF]);
87 try_fwrite(line, strlen(line), 1, file, __func__);
93 static void write_string(FILE * file, char * string)
95 uint8_t contains_space = NULL != strchr(string, ' ');
98 try_fputc('\'', file, __func__);
100 try_fwrite(string, strlen(string), 1, file, __func__);
103 try_fputc('\'', file, __func__);
109 static void write_key_space_value(FILE * file, char * key, uint32_t value)
111 write_key_space(file, key);
112 write_value(file, value);
113 try_fputc('\n', file, __func__);
118 static void write_key_space_string(FILE * file, char * key, char * string)
120 write_key_space(file, key);
121 write_string(file, string);
122 try_fputc('\n', file, __func__);
127 static void write_thing(FILE * file, struct Thing * t)
130 for (o = t->owns; o; o = o->next)
132 write_thing(file, o);
134 write_key_space_value(file, s[S_CMD_T_ID], t->id);
135 write_key_space_value(file, s[S_CMD_T_TYPE], t->type);
136 write_key_space_value(file, s[S_CMD_T_POSY], t->pos.y);
137 write_key_space_value(file, s[S_CMD_T_POSX], t->pos.x);
138 write_key_space_value(file, s[S_CMD_T_COMMAND], t->command);
139 write_key_space_value(file, s[S_CMD_T_ARGUMENT], t->arg);
140 write_key_space_value(file, s[S_CMD_T_PROGRESS], t->progress);
141 write_key_space_value(file, s[S_CMD_T_HP], t->lifepoints);
142 for (o = t->owns; o; o = o->next)
144 write_key_space_value(file, s[S_CMD_T_CARRIES], o->id);
148 uint32_t map_size = world.map.length * world.map.length;/* snprintf() */
149 char * mem_map_copy = try_malloc(map_size + 1, __func__);/* reads one */
150 memcpy(mem_map_copy, t->mem_map, map_size); /* byte beyond map_size */
151 mem_map_copy[map_size] = '\0'; /* if string is not \0-terminated. */
153 char string[UINT8_MAX + 1 + 1];
154 for (y = 0; y < world.map.length; y++)
157 int test = snprintf(string, world.map.length + 1, "%s",
158 mem_map_copy + (y * world.map.length));
159 exit_trouble(test < 0, __func__, "snprintf()");
160 write_key_space(file, s[S_CMD_T_MEMMAP]);
161 write_value(file, y);
162 try_fputc(' ', file, __func__);
163 write_string(file, string);
164 try_fputc('\n', file, __func__);
168 try_fputc('\n', file, __func__);
173 static char * get_message_from_queue()
175 char * message = NULL;
176 if (world.queue_size)
178 size_t cutout_len = strlen(world.queue);
182 message = try_malloc(cutout_len, __func__);
183 memcpy(message, world.queue, cutout_len);
186 cutout_len != world.queue_size && '\0' == world.queue[cutout_len];
188 world.queue_size = world.queue_size - cutout_len;
189 if (0 == world.queue_size)
191 free(world.queue); /* NULL so read_file_into_queue() may free() */
192 world.queue = NULL; /* this every time, even when it's */
193 } /* un-allocated first. */
196 char * new_queue = try_malloc(world.queue_size, __func__);
197 memcpy(new_queue, &(world.queue[cutout_len]), world.queue_size);
199 world.queue = new_queue;
207 static void read_file_into_queue()
209 uint8_t wait_seconds = 5;
210 time_t now = time(0);
213 dur.tv_nsec = 33333333;
215 while (EOF == (test = try_fgetc(world.file_in, __func__)))
217 nanosleep(&dur, NULL);
218 if (time(0) > now + wait_seconds)
225 char c = (char) test;
230 char * new_queue = try_malloc(world.queue_size + 1, __func__);
231 memcpy(new_queue, world.queue, world.queue_size);
232 char * new_pos = new_queue + world.queue_size;
236 world.queue = new_queue;
238 while (EOF != (test = try_fgetc(world.file_in, __func__)));
243 static void update_worldstate_file()
246 FILE * file = atomic_write_start(s[S_PATH_WORLDSTATE], &path_tmp);
247 struct Thing * player = get_player();
248 write_value_as_line(world.turn, file);
249 write_value_as_line(player->lifepoints, file);
250 write_inventory(player, file);
251 write_value_as_line(player->pos.y, file);
252 write_value_as_line(player->pos.x, file);
253 write_value_as_line(world.map.length, file);
254 write_map(player, file);
257 try_fwrite(world.log, strlen(world.log), 1, file, __func__);
259 atomic_write_finish(file, s[S_PATH_WORLDSTATE], path_tmp);
260 set_cleanup_flag(CLEANUP_WORLDSTATE);
262 try_fwrite(dot, strlen(dot), 1, world.file_out, __func__);
263 fflush(world.file_out);
268 static void write_value_as_line(uint32_t value, FILE * file)
270 char write_buf[12]; /* Holds 10 digits of uint32_t maximum + \n + \0. */
271 exit_trouble(sprintf(write_buf,"%u\n",value) < 0,__func__,s[S_FCN_SPRINTF]);
272 try_fwrite(write_buf, strlen(write_buf), 1, file, __func__);
277 static void write_inventory(struct Thing * player, FILE * file)
279 struct Thing * owned = player->owns;
282 char * empty = "(none)\n";
283 try_fwrite(empty, strlen(empty), 1, file, __func__);
288 for (q = 0; NULL != owned; q++)
290 struct ThingType * tt = get_thing_type(owned->type);
291 try_fwrite(tt->name, strlen(tt->name), 1, file, __func__);
292 try_fputc('\n', file, __func__);
296 try_fputc('%', file, __func__);
297 try_fputc('\n', file, __func__);
302 static char * build_visible_map(struct Thing * player)
304 uint32_t map_size = world.map.length * world.map.length;
305 char * visible_map = try_malloc(map_size, __func__);
306 memset(visible_map, ' ', map_size);
307 if (player->fov_map) /* May fail if player thing was created / positioned */
308 { /* by god command after turning off FOV building. */
310 for (pos_i = 0; pos_i < map_size; pos_i++)
312 if (player->fov_map[pos_i] & VISIBLE)
314 visible_map[pos_i] = world.map.cells[pos_i];
318 struct ThingType * tt;
321 for (i = 0; i < 2; i++)
323 for (t = world.things; t != 0; t = t->next)
325 if ( ( player->fov_map[t->pos.y * world.map.length +t->pos.x]
327 && ( (0 == i && 0 == t->lifepoints)
328 || (1 == i && 0 < t->lifepoints)))
330 tt = get_thing_type(t->type);
332 visible_map[t->pos.y * world.map.length + t->pos.x] = c;
342 static void write_map(struct Thing * player, FILE * file)
344 char * visible_map = build_visible_map(player);
346 for (y = 0; y < world.map.length; y++)
348 for (x = 0; x < world.map.length; x++)
350 try_fputc(visible_map[y * world.map.length + x], file, __func__);
352 try_fputc('\n', file, __func__);
355 for (y = 0; y < world.map.length; y++)
357 for (x = 0; x < world.map.length; x++)
359 try_fputc(player->mem_map[y * world.map.length + x], file, __func__);
361 try_fputc('\n', file, __func__);
367 extern char * io_round()
369 if (0 < world.queue_size)
371 return get_message_from_queue();
375 update_worldstate_file();
378 read_file_into_queue();
379 if (world.queue_size && '\0' != world.queue[world.queue_size - 1])
381 char * new_queue = try_malloc(world.queue_size + 1, __func__);
382 memcpy(new_queue, world.queue, world.queue_size);
383 new_queue[world.queue_size] = '\0';
386 world.queue = new_queue;
388 return get_message_from_queue();
393 extern void save_world()
396 FILE * file = atomic_write_start(s[S_PATH_SAVE], &path_tmp);
397 write_key_space_value(file, s[S_CMD_MAPLENGTH], world.map.length);
398 write_key_space_value(file, s[S_CMD_PLAYTYPE], world.player_type);
399 try_fputc('\n', file, __func__);
400 struct ThingAction * ta;
401 for (ta = world.thing_actions; ta; ta = ta->next)
403 write_key_space_value(file, s[S_CMD_TA_ID], ta->id);
404 write_key_space_value(file, s[S_CMD_TA_EFFORT], ta->effort);
405 write_key_space_string(file, s[S_CMD_TA_NAME], ta->name);
406 try_fputc('\n', file, __func__);
408 struct ThingType * tt;
409 for (tt = world.thing_types; tt; tt = tt->next)
411 write_key_space_value(file, s[S_CMD_TT_ID], tt->id);
412 write_key_space_value(file, s[S_CMD_TT_STARTN], tt->start_n);
413 write_key_space_value(file, s[S_CMD_TT_HP], tt->lifepoints);
414 int test = fprintf(file, "%s %c\n", s[S_CMD_TT_SYMB], tt->char_on_map);
415 exit_trouble(test < 0, __func__, "fprintf");
416 write_key_space_string(file, s[S_CMD_TT_NAME], tt->name);
417 write_key_space_value(file, s[S_CMD_TT_CONSUM], tt->consumable);
418 try_fputc('\n', file, __func__);
420 for (tt = world.thing_types; tt; tt = tt->next)
422 write_key_space_value(file, s[S_CMD_TT_ID], tt->id);
423 write_key_space_value(file, s[S_CMD_TT_CORPS], tt->corpse_id);
425 try_fputc('\n', file, __func__);
426 write_key_space_value(file, s[S_CMD_SEED_MAP], world.seed_map);
427 write_key_space_value(file, s[S_CMD_SEED_RAND], world.seed);
428 write_key_space_value(file, s[S_CMD_TURN], world.turn);
429 try_fputc('\n', file, __func__);
431 for (t = world.things; t; t = t->next)
433 write_thing(file, t);
435 write_key_space_value(file, s[S_CMD_WORLD_ACTIVE], 1);
436 atomic_write_finish(file, s[S_PATH_SAVE], path_tmp);