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> /* NULL */
13 #include <stdint.h> /* uint8_t, uint16_t, uint32_t, UINT8_MAX */
14 #include <stdio.h> /* defines 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 * get_message_from_queue(), try_fwrite(),
21 * read_file_into_queue(), try_fputc()
23 #include "../common/rexit.h" /* exit_trouble() */
24 #include "../common/try_malloc.h" /* try_malloc() */
25 #include "cleanup.h" /* set_cleanup_flag() */
26 #include "hardcoded_strings.h" /* s */
27 #include "things.h" /* Thing, ThingType, ThingInMemory, ThingAction,
28 * get_thing_type(), get_player()
30 #include "world.h" /* global world */
34 /* Helpers to write lines of god commands to recreate thing "t". */
35 static void write_key_space(FILE * file, char * key);
36 static void write_value(FILE * file, uint32_t value);
37 static void write_string(FILE * file, char * string);
38 static void write_key_space_value(FILE * file, char * key, uint32_t value);
39 static void write_key_space_string(FILE * file, char * key, char * string);
41 /* Write to "file" \n-delimited line of "key" + space + "value" as string. */
42 static void write_thing(FILE * file, struct Thing * t);
44 /* Poll input file for world.queue input. Wait a few seconds until giving up;
45 * poll only every 0.03 seconds. Translate '\n' chars in input file into '\0'.
47 static void try_growing_queue();
49 /* Write world state as visible to clients to its file. Write single dot line to
50 * server output file to satisfy client ping mechanisms.
52 static void update_worldstate_file();
54 /* Write "value" to new \n-delimited line of "file". */
55 static void write_value_as_line(uint32_t value, FILE * file);
57 /* Write to "file" player's inventory, one item name per line. End in "%\n". */
58 static void write_inventory(struct Thing * player, FILE * file);
60 /* Return map cells sequence as visible to the "player", with invisible cells as
61 * whitespace. Super-impose over visible map cells things positioned there,
62 * with animate things overwriting inanimate things, and inanimate consumable
63 * things overwriting inanimate non-consumable things.
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 and .t_mem. 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__);
167 struct ThingInMemory * tm = t->t_mem;
168 for (; tm; tm = tm->next)
170 write_key_space(file, s[S_CMD_T_MEMTHING]);
171 write_value(file, tm->type);
172 try_fputc(' ', file, __func__);
173 write_value(file, tm->pos.y);
174 try_fputc(' ', file, __func__);
175 write_value(file, tm->pos.x);
176 try_fputc('\n', file, __func__);
179 try_fputc('\n', file, __func__);
184 static void try_growing_queue()
186 uint8_t wait_seconds = 5;
187 time_t now = time(0);
190 dur.tv_nsec = 33333333;
193 if (read_file_into_queue(world.file_in, &world.queue))
197 nanosleep(&dur, NULL);
198 if (time(0) > now + wait_seconds)
207 static void update_worldstate_file()
210 FILE * file = atomic_write_start(s[S_PATH_WORLDSTATE], &path_tmp);
211 struct Thing * player = get_player();
212 write_value_as_line(world.turn, file);
213 write_value_as_line(player->lifepoints, file);
214 write_inventory(player, file);
215 write_value_as_line(player->pos.y, file);
216 write_value_as_line(player->pos.x, file);
217 write_value_as_line(world.map.length, file);
218 write_map(player, file);
219 atomic_write_finish(file, s[S_PATH_WORLDSTATE], path_tmp);
220 set_cleanup_flag(CLEANUP_WORLDSTATE);
222 try_fwrite(dot, strlen(dot), 1, world.file_out, __func__);
223 fflush(world.file_out);
228 static void write_value_as_line(uint32_t value, FILE * file)
230 char write_buf[12]; /* Holds 10 digits of uint32_t maximum + \n + \0. */
231 exit_trouble(sprintf(write_buf,"%u\n",value) < 0,__func__,s[S_FCN_SPRINTF]);
232 try_fwrite(write_buf, strlen(write_buf), 1, file, __func__);
237 static void write_inventory(struct Thing * player, FILE * file)
239 struct Thing * owned = player->owns;
242 char * empty = "(none)\n";
243 try_fwrite(empty, strlen(empty), 1, file, __func__);
248 for (q = 0; owned; q++)
250 struct ThingType * tt = get_thing_type(owned->type);
251 try_fwrite(tt->name, strlen(tt->name), 1, file, __func__);
252 try_fputc('\n', file, __func__);
256 try_fputc('%', file, __func__);
257 try_fputc('\n', file, __func__);
262 static char * build_visible_map(struct Thing * player)
264 uint32_t map_size = world.map.length * world.map.length;
265 char * visible_map = try_malloc(map_size, __func__);
266 memset(visible_map, ' ', map_size);
267 if (player->fov_map) /* May fail if player thing was created / positioned */
268 { /* by god command after turning off FOV building. */
270 for (pos_i = 0; pos_i < map_size; pos_i++)
272 if (player->fov_map[pos_i] == 'v')
274 visible_map[pos_i] = world.map.cells[pos_i];
280 for (i = 0; i < 3; i++)
282 for (t = world.things; t != 0; t = t->next)
284 if ('v' == player->fov_map[t->pos.y*world.map.length+t->pos.x])
286 struct ThingType * tt = get_thing_type(t->type);
287 if ( (0 == i && !t->lifepoints && !tt->consumable)
288 || (1 == i && !t->lifepoints && tt->consumable)
289 || (2 == i && t->lifepoints))
292 visible_map[t->pos.y * world.map.length + t->pos.x] = c;
303 static void write_map(struct Thing * player, FILE * file)
305 char * visible_map = build_visible_map(player);
307 for (y = 0; y < world.map.length; y++)
309 for (x = 0; x < world.map.length; x++)
311 try_fputc(visible_map[y * world.map.length + x], file, __func__);
313 try_fputc('\n', file, __func__);
316 uint32_t map_size = world.map.length * world.map.length;
317 char * mem_map = try_malloc(map_size, __func__);
318 memcpy(mem_map, player->mem_map, map_size);
320 struct ThingInMemory * tm;
321 for (i = 0; i < 2; i++)
323 for (tm = player->t_mem; tm; tm = tm->next)
325 if (' ' != player->mem_map[tm->pos.y*world.map.length+tm->pos.x])
327 struct ThingType * tt = get_thing_type(tm->type);
328 if ( (0 == i && !tt->consumable)
329 || (1 == i && tt->consumable))
331 char c = tt->char_on_map;
332 mem_map[tm->pos.y * world.map.length + tm->pos.x] = c;
337 for (y = 0; y < world.map.length; y++)
339 for (x = 0; x < world.map.length; x++)
341 try_fputc(mem_map[y * world.map.length + x], file, __func__);
343 try_fputc('\n', file, __func__);
350 extern char * io_round()
352 if (world.queue && strlen(world.queue))
354 return get_message_from_queue(&world.queue);
358 update_worldstate_file();
362 return get_message_from_queue(&world.queue);
367 extern void save_world()
370 FILE * file = atomic_write_start(s[S_PATH_SAVE], &path_tmp);
371 write_key_space_value(file, s[S_CMD_MAPLENGTH], world.map.length);
372 write_key_space_value(file, s[S_CMD_PLAYTYPE], world.player_type);
373 try_fputc('\n', file, __func__);
374 struct ThingAction * ta;
375 for (ta = world.thing_actions; ta; ta = ta->next)
377 write_key_space_value(file, s[S_CMD_TA_ID], ta->id);
378 write_key_space_value(file, s[S_CMD_TA_EFFORT], ta->effort);
379 write_key_space_string(file, s[S_CMD_TA_NAME], ta->name);
380 try_fputc('\n', file, __func__);
382 struct ThingType * tt;
383 for (tt = world.thing_types; tt; tt = tt->next)
385 write_key_space_value(file, s[S_CMD_TT_ID], tt->id);
386 write_key_space_value(file, s[S_CMD_TT_STARTN], tt->start_n);
387 write_key_space_value(file, s[S_CMD_TT_HP], tt->lifepoints);
388 int test = fprintf(file, "%s %c\n", s[S_CMD_TT_SYMB], tt->char_on_map);
389 exit_trouble(test < 0, __func__, "fprintf");
390 write_key_space_string(file, s[S_CMD_TT_NAME], tt->name);
391 write_key_space_value(file, s[S_CMD_TT_CONSUM], tt->consumable);
392 write_key_space_value(file, s[S_CMD_TT_PROL], tt->proliferate);
393 try_fputc('\n', file, __func__);
395 for (tt = world.thing_types; tt; tt = tt->next)
397 write_key_space_value(file, s[S_CMD_TT_ID], tt->id);
398 write_key_space_value(file, s[S_CMD_TT_CORPS], tt->corpse_id);
400 try_fputc('\n', file, __func__);
401 write_key_space_value(file, s[S_CMD_SEED_MAP], world.seed_map);
402 write_key_space_value(file, s[S_CMD_SEED_RAND], world.seed);
403 write_key_space_value(file, s[S_CMD_TURN], world.turn);
404 try_fputc('\n', file, __func__);
406 for (t = world.things; t; t = t->next)
408 write_thing(file, t);
410 write_key_space_value(file, s[S_CMD_WORLD_ACTIVE], 1);
411 atomic_write_finish(file, s[S_PATH_SAVE], path_tmp);