3 * This file is part of PlomRogue. PlomRogue is licensed under the GPL version 3
4 * or any later version. For details on its copyright, license, and warranties,
5 * see the file NOTICE in the root directory of the PlomRogue source package.
8 #define _POSIX_C_SOURCE 200112L /* snrpintf() */
10 #include <errno.h> /* global errno */
11 #include <limits.h> /* PIPE_BUF */
12 #include <stddef.h> /* size_t, NULL */
13 #include <stdint.h> /* uint8_t, uint16_t, uint32_t, UINT8_MAX */
14 #include <stdio.h> /* defines EOF, FILE, sprintf(), fprintf() */
15 #include <stdlib.h> /* free() */
16 #include <string.h> /* strlen(), snprintf(), memcpy(), memset(), strchr() */
17 #include <sys/types.h> /* time_t */
18 #include <time.h> /* time(), nanosleep() */
19 #include "../common/readwrite.h" /* atomic_write_start(), atomic_write_finish(),
20 * try_fwrite(), try_fputc(), try_fgetc()
22 #include "../common/rexit.h" /* exit_trouble() */
23 #include "../common/try_malloc.h" /* try_malloc() */
24 #include "cleanup.h" /* set_cleanup_flag() */
25 #include "hardcoded_strings.h" /* s */
26 #include "things.h" /* Thing, ThingType, ThingInMemory, ThingAction,
27 * get_thing_type(), get_player()
29 #include "world.h" /* global world */
33 /* Helpers to write lines of god commands to recreate thing "t". */
34 static void write_key_space(FILE * file, char * key);
35 static void write_value(FILE * file, uint32_t value);
36 static void write_string(FILE * file, char * string);
37 static void write_key_space_value(FILE * file, char * key, uint32_t value);
38 static void write_key_space_string(FILE * file, char * key, char * string);
40 /* Write to "file" \n-delimited line of "key" + space + "value" as string. */
41 static void write_thing(FILE * file, struct Thing * t);
43 /* Cut out and return first \0-terminated string from world.queue and
44 * appropriately reduce world.queue_size. Return NULL if queue is empty.
45 * Superfluous \0 bytes after the string are also cut out. Should the queue
46 * start with \0 bytes, those are cut out, but NULL is returned instead of "".
48 static char * get_message_from_queue();
50 /* Poll input file for world.queue input. Wait a few seconds until giving up;
51 * poll only every 0.03 seconds.. Translate '\n' chars in input file into '\0'.
53 static void read_file_into_queue();
55 /* Write world state as visible to clients to its file. Write single dot line to
56 * server output file to satisfy client ping mechanisms.
58 static void update_worldstate_file();
60 /* Write "value" to new \n-delimited line of "file". */
61 static void write_value_as_line(uint32_t value, FILE * file);
63 /* Write to "file" player's inventory, one item name per line. End in "%\n". */
64 static void write_inventory(struct Thing * player, FILE * file);
66 /* Return map cells sequence as visible to the "player", with invisible cells as
67 * whitespace. Super-impose over visible map cells things positioned there,
68 * with animate things overwriting inanimate things, and inanimate consumable
69 * things overwriting inanimate non-consumable things.
71 static char * build_visible_map(struct Thing * player);
73 /* Write to "file" game map as visible to "player" right now, as drawn by
74 * build_visible_map(), and thereafter game map as memorized by player in its
75 * .mem_map and .t_mem. Write one row per \n-delimited line.
77 static void write_map(struct Thing * player, FILE * file);
81 static void write_key_space(FILE * file, char * key)
83 try_fwrite(key, strlen(key), 1, file, __func__);
84 try_fputc(' ', file, __func__);
89 static void write_value(FILE * file, uint32_t value)
91 char * line = try_malloc(11, __func__);
92 exit_trouble(-1 == sprintf(line, "%u", value), __func__, s[S_FCN_SPRINTF]);
93 try_fwrite(line, strlen(line), 1, file, __func__);
99 static void write_string(FILE * file, char * string)
101 uint8_t contains_space = NULL != strchr(string, ' ');
104 try_fputc('\'', file, __func__);
106 try_fwrite(string, strlen(string), 1, file, __func__);
109 try_fputc('\'', file, __func__);
115 static void write_key_space_value(FILE * file, char * key, uint32_t value)
117 write_key_space(file, key);
118 write_value(file, value);
119 try_fputc('\n', file, __func__);
124 static void write_key_space_string(FILE * file, char * key, char * string)
126 write_key_space(file, key);
127 write_string(file, string);
128 try_fputc('\n', file, __func__);
133 static void write_thing(FILE * file, struct Thing * t)
136 for (o = t->owns; o; o = o->next)
138 write_thing(file, o);
140 write_key_space_value(file, s[S_CMD_T_ID], t->id);
141 write_key_space_value(file, s[S_CMD_T_TYPE], t->type);
142 write_key_space_value(file, s[S_CMD_T_POSY], t->pos.y);
143 write_key_space_value(file, s[S_CMD_T_POSX], t->pos.x);
144 write_key_space_value(file, s[S_CMD_T_COMMAND], t->command);
145 write_key_space_value(file, s[S_CMD_T_ARGUMENT], t->arg);
146 write_key_space_value(file, s[S_CMD_T_PROGRESS], t->progress);
147 write_key_space_value(file, s[S_CMD_T_HP], t->lifepoints);
148 for (o = t->owns; o; o = o->next)
150 write_key_space_value(file, s[S_CMD_T_CARRIES], o->id);
154 uint32_t map_size = world.map.length * world.map.length;/* snprintf() */
155 char * mem_map_copy = try_malloc(map_size + 1, __func__);/* reads one */
156 memcpy(mem_map_copy, t->mem_map, map_size); /* byte beyond map_size */
157 mem_map_copy[map_size] = '\0'; /* if string is not \0-terminated. */
159 char string[UINT8_MAX + 1 + 1];
160 for (y = 0; y < world.map.length; y++)
163 int test = snprintf(string, world.map.length + 1, "%s",
164 mem_map_copy + (y * world.map.length));
165 exit_trouble(test < 0, __func__, "snprintf()");
166 write_key_space(file, s[S_CMD_T_MEMMAP]);
167 write_value(file, y);
168 try_fputc(' ', file, __func__);
169 write_string(file, string);
170 try_fputc('\n', file, __func__);
173 struct ThingInMemory * tm = t->t_mem;
174 for (; tm; tm = tm->next)
176 write_key_space(file, s[S_CMD_T_MEMTHING]);
177 write_value(file, tm->type);
178 try_fputc(' ', file, __func__);
179 write_value(file, tm->pos.y);
180 try_fputc(' ', file, __func__);
181 write_value(file, tm->pos.x);
182 try_fputc('\n', file, __func__);
185 try_fputc('\n', file, __func__);
190 static char * get_message_from_queue()
192 char * message = NULL;
193 if (world.queue_size)
195 size_t cutout_len = strlen(world.queue);
199 message = try_malloc(cutout_len, __func__);
200 memcpy(message, world.queue, cutout_len);
203 cutout_len != world.queue_size && '\0' == world.queue[cutout_len];
205 world.queue_size = world.queue_size - cutout_len;
206 if (0 == world.queue_size)
208 free(world.queue); /* NULL so read_file_into_queue() may free() */
209 world.queue = NULL; /* this every time, even when it's */
210 } /* un-allocated first. */
213 char * new_queue = try_malloc(world.queue_size, __func__);
214 memcpy(new_queue, &(world.queue[cutout_len]), world.queue_size);
216 world.queue = new_queue;
224 static void read_file_into_queue()
226 uint8_t wait_seconds = 5;
227 time_t now = time(0);
230 dur.tv_nsec = 33333333;
232 while (EOF == (test = try_fgetc(world.file_in, __func__)))
234 nanosleep(&dur, NULL);
235 if (time(0) > now + wait_seconds)
242 char c = (char) test;
247 char * new_queue = try_malloc(world.queue_size + 1, __func__);
248 memcpy(new_queue, world.queue, world.queue_size);
249 char * new_pos = new_queue + world.queue_size;
253 world.queue = new_queue;
255 while (EOF != (test = try_fgetc(world.file_in, __func__)));
260 static void update_worldstate_file()
263 FILE * file = atomic_write_start(s[S_PATH_WORLDSTATE], &path_tmp);
264 struct Thing * player = get_player();
265 write_value_as_line(world.turn, file);
266 write_value_as_line(player->lifepoints, file);
267 write_inventory(player, file);
268 write_value_as_line(player->pos.y, file);
269 write_value_as_line(player->pos.x, file);
270 write_value_as_line(world.map.length, file);
271 write_map(player, file);
274 try_fwrite(world.log, strlen(world.log), 1, file, __func__);
276 atomic_write_finish(file, s[S_PATH_WORLDSTATE], path_tmp);
277 set_cleanup_flag(CLEANUP_WORLDSTATE);
279 try_fwrite(dot, strlen(dot), 1, world.file_out, __func__);
280 fflush(world.file_out);
285 static void write_value_as_line(uint32_t value, FILE * file)
287 char write_buf[12]; /* Holds 10 digits of uint32_t maximum + \n + \0. */
288 exit_trouble(sprintf(write_buf,"%u\n",value) < 0,__func__,s[S_FCN_SPRINTF]);
289 try_fwrite(write_buf, strlen(write_buf), 1, file, __func__);
294 static void write_inventory(struct Thing * player, FILE * file)
296 struct Thing * owned = player->owns;
299 char * empty = "(none)\n";
300 try_fwrite(empty, strlen(empty), 1, file, __func__);
305 for (q = 0; owned; q++)
307 struct ThingType * tt = get_thing_type(owned->type);
308 try_fwrite(tt->name, strlen(tt->name), 1, file, __func__);
309 try_fputc('\n', file, __func__);
313 try_fputc('%', file, __func__);
314 try_fputc('\n', file, __func__);
319 static char * build_visible_map(struct Thing * player)
321 uint32_t map_size = world.map.length * world.map.length;
322 char * visible_map = try_malloc(map_size, __func__);
323 memset(visible_map, ' ', map_size);
324 if (player->fov_map) /* May fail if player thing was created / positioned */
325 { /* by god command after turning off FOV building. */
327 for (pos_i = 0; pos_i < map_size; pos_i++)
329 if (player->fov_map[pos_i] == 'v')
331 visible_map[pos_i] = world.map.cells[pos_i];
337 for (i = 0; i < 3; i++)
339 for (t = world.things; t != 0; t = t->next)
341 if ('v' == player->fov_map[t->pos.y*world.map.length+t->pos.x])
343 struct ThingType * tt = get_thing_type(t->type);
344 if ( (0 == i && !t->lifepoints && !tt->consumable)
345 || (1 == i && !t->lifepoints && tt->consumable)
346 || (2 == i && t->lifepoints))
349 visible_map[t->pos.y * world.map.length + t->pos.x] = c;
360 static void write_map(struct Thing * player, FILE * file)
362 char * visible_map = build_visible_map(player);
364 for (y = 0; y < world.map.length; y++)
366 for (x = 0; x < world.map.length; x++)
368 try_fputc(visible_map[y * world.map.length + x], file, __func__);
370 try_fputc('\n', file, __func__);
373 uint32_t map_size = world.map.length * world.map.length;
374 char * mem_map = try_malloc(map_size, __func__);
375 memcpy(mem_map, player->mem_map, map_size);
377 struct ThingInMemory * tm;
378 for (i = 0; i < 2; i++)
380 for (tm = player->t_mem; tm; tm = tm->next)
382 if (' ' != player->mem_map[tm->pos.y*world.map.length+tm->pos.x])
384 struct ThingType * tt = get_thing_type(tm->type);
385 if ( (0 == i && !tt->consumable)
386 || (1 == i && tt->consumable))
388 char c = tt->char_on_map;
389 mem_map[tm->pos.y * world.map.length + tm->pos.x] = c;
394 for (y = 0; y < world.map.length; y++)
396 for (x = 0; x < world.map.length; x++)
398 try_fputc(mem_map[y * world.map.length + x], file, __func__);
400 try_fputc('\n', file, __func__);
407 extern char * io_round()
409 if (0 < world.queue_size)
411 return get_message_from_queue();
415 update_worldstate_file();
418 read_file_into_queue();
419 if (world.queue_size && '\0' != world.queue[world.queue_size - 1])
421 char * new_queue = try_malloc(world.queue_size + 1, __func__);
422 memcpy(new_queue, world.queue, world.queue_size);
423 new_queue[world.queue_size] = '\0';
426 world.queue = new_queue;
428 return get_message_from_queue();
433 extern void save_world()
436 FILE * file = atomic_write_start(s[S_PATH_SAVE], &path_tmp);
437 write_key_space_value(file, s[S_CMD_MAPLENGTH], world.map.length);
438 write_key_space_value(file, s[S_CMD_PLAYTYPE], world.player_type);
439 try_fputc('\n', file, __func__);
440 struct ThingAction * ta;
441 for (ta = world.thing_actions; ta; ta = ta->next)
443 write_key_space_value(file, s[S_CMD_TA_ID], ta->id);
444 write_key_space_value(file, s[S_CMD_TA_EFFORT], ta->effort);
445 write_key_space_string(file, s[S_CMD_TA_NAME], ta->name);
446 try_fputc('\n', file, __func__);
448 struct ThingType * tt;
449 for (tt = world.thing_types; tt; tt = tt->next)
451 write_key_space_value(file, s[S_CMD_TT_ID], tt->id);
452 write_key_space_value(file, s[S_CMD_TT_STARTN], tt->start_n);
453 write_key_space_value(file, s[S_CMD_TT_HP], tt->lifepoints);
454 int test = fprintf(file, "%s %c\n", s[S_CMD_TT_SYMB], tt->char_on_map);
455 exit_trouble(test < 0, __func__, "fprintf");
456 write_key_space_string(file, s[S_CMD_TT_NAME], tt->name);
457 write_key_space_value(file, s[S_CMD_TT_CONSUM], tt->consumable);
458 try_fputc('\n', file, __func__);
460 for (tt = world.thing_types; tt; tt = tt->next)
462 write_key_space_value(file, s[S_CMD_TT_ID], tt->id);
463 write_key_space_value(file, s[S_CMD_TT_CORPS], tt->corpse_id);
465 try_fputc('\n', file, __func__);
466 write_key_space_value(file, s[S_CMD_SEED_MAP], world.seed_map);
467 write_key_space_value(file, s[S_CMD_SEED_RAND], world.seed);
468 write_key_space_value(file, s[S_CMD_TURN], world.turn);
469 try_fputc('\n', file, __func__);
471 for (t = world.things; t; t = t->next)
473 write_thing(file, t);
475 write_key_space_value(file, s[S_CMD_WORLD_ACTIVE], 1);
476 atomic_write_finish(file, s[S_PATH_SAVE], path_tmp);