plomlompom.com Git - plomrogue/blob - src/server/run.c

   1 /* src/server/run.c */
   2
   3 #define _POSIX_C_SOURCE 200809L
   4 #include "run.h"
   5 #include <stddef.h> /* NULL */
   6 #include <stdint.h> /* uint8_t, uint16_t, uint32_t */
   7 #include <stdio.h> /* FILE, printf(), fflush() */
   8 #include <stdlib.h> /* free() */
   9 #include <string.h> /* strlen(), strcmp(), strncmp(), strdup() */
  10 #include <time.h> /* time_t, time() */
  11 #include <unistd.h> /* access() */
  12 #include "../common/parse_file.h" /* set_err_line_options(), token_from_line(),
  13                                    * err_line(), err_line_inc(), parse_val()
  14                                    */
  15 #include "../common/readwrite.h" /* try_fopen(), try_fcose(), try_fwrite(),
  16                                   * try_fgets(), textfile_width(), try_fputc(),
  17                                   * atomic_write_finish(), build_temp_path()
  18                                   */
  19 #include "../common/rexit.h" /* exit_trouble(), exit_err() */
  20 #include "../common/try_malloc.h" /* try_malloc() */
  21 #include "ai.h" /* ai() */
  22 #include "cleanup.h" /* unset_cleanup_flag() */
  23 #include "god_commands.h" /* parse_god_command_(1|2|3)arg() */
  24 #include "hardcoded_strings.h" /* s */
  25 #include "io.h" /* io_round(), save_world() */
  26 #include "things.h" /* Thing, get_thing_action_id_by_name(), get_player() */
  27 #include "world.h" /* world */
  28
  29
  30
  31 /* If "string" and "comparand" match in string, set "c_to_set" to value."  */
  32 static uint8_t set_char_by_string_comparison(char * string, char * comparand,
  33                                              char * c_to_set, char value);
  34
  35 /* Return 1 on world.exists, else 0 and err_line() appropriate error message. */
  36 static uint8_t player_commands_allowed();
  37
  38 /* Parse player command "tok0" with no argument to player action. */
  39 static uint8_t parse_player_command_0arg(char * tok0);
  40
  41 /* Parse player command "tok0" with one argument "tok1" to player action. */
  42 static uint8_t parse_player_command_1arg(char * tok0, char * tok1);
  43
  44 /* Parse/apply command "tok0" (read further tokens as necessary). */
  45 static uint8_t parse_command(char * tok0);
  46
  47 /* Compares first line of server out file to world.server_test, aborts if they
  48  * don't match, but not before unsetting the flags deleting files in the server
  49  * directory, for in that case those must be assumed to belong to another server
  50  * process.
  51  */
  52 static void server_test();
  53
  54 /* Run the game world and its inhabitants (and their actions) until the player
  55  * avatar is free to receive new commands (or is dead).
  56  */
  57 static void turn_over();
  58
  59
  60
  61 static uint8_t set_char_by_string_comparison(char * string, char * comparand,
  62                                              char * c_to_set, char value)
  63 {
  64     if (!strcmp(string, comparand))
  65     {
  66         * c_to_set = value;
  67         return 1;
  68     }
  69     return 0;
  70 }
  71
  72
  73
  74 static uint8_t player_commands_allowed()
  75 {
  76     if (!world.exists)
  77     {
  78         return !err_line(1, "No world exists in which to run player commands.");
  79     }
  80     return 1;
  81 }
  82
  83
  84
  85 static uint8_t parse_player_command_0arg(char * tok0)
  86 {
  87     struct Thing * player = get_player();
  88     if (   !strcmp(tok0, s[S_CMD_WAIT]) || !strcmp(tok0, s[S_CMD_PICKUP])
  89         || !strcmp(tok0, s[S_CMD_AI]))
  90     {
  91         if (player_commands_allowed())
  92         {
  93             if (!strcmp(tok0, s[S_CMD_AI]))
  94             {
  95                 ai(player);
  96             }
  97             else
  98             {
  99                 player->command = get_thing_action_id_by_name(tok0);
 100                 player->arg = 0;
 101             }
 102             turn_over();
 103         }
 104         return 1;
 105     }
 106     return 0;
 107 }
 108
 109
 110
 111 static uint8_t parse_player_command_1arg(char * tok0, char * tok1)
 112 {
 113     struct Thing * player = get_player();
 114     if (   (   parse_val(tok0, tok1, s[S_CMD_DROP], '8', (char *) &player->arg)
 115             || parse_val(tok0, tok1, s[S_CMD_USE], '8', (char *) &player->arg))
 116         && player_commands_allowed())
 117     {
 118         player->command = get_thing_action_id_by_name(tok0);
 119         turn_over();
 120     }
 121     else if (!strcmp(tok0, s[S_CMD_MOVE]) && player_commands_allowed())
 122     {
 123         char dir = '\0';
 124         if (!(   set_char_by_string_comparison(tok1, "east",       &dir, 'd')
 125               || set_char_by_string_comparison(tok1, "south-east", &dir, 'c')
 126               || set_char_by_string_comparison(tok1, "south-west", &dir, 'x')
 127               || set_char_by_string_comparison(tok1, "west",       &dir, 's')
 128               || set_char_by_string_comparison(tok1, "north-west", &dir, 'w')
 129               || set_char_by_string_comparison(tok1, "north-east", &dir, 'e')))
 130         {
 131             return 0;
 132         }
 133         player->arg = dir;
 134         player->command = get_thing_action_id_by_name(tok0);
 135         turn_over();
 136     }
 137     else
 138     {
 139         return 0;
 140     }
 141     return 1;
 142 }
 143
 144
 145
 146 static uint8_t parse_command(char * tok0)
 147 {
 148     if (parse_player_command_0arg(tok0))
 149     {
 150         return 1;
 151     }
 152     else
 153     {
 154         char * tok1 = token_from_line(NULL);
 155         if (tok1 && (   parse_player_command_1arg(tok0, tok1)
 156                      || parse_god_command_1arg(tok0, tok1)))
 157         {
 158             return 1;
 159         }
 160         else
 161         {
 162             char * tok2 = token_from_line(NULL);
 163             if (tok2 && parse_god_command_2arg(tok0, tok1, tok2))
 164             {
 165                 return 1;
 166             }
 167             else
 168             {
 169                 char * tok3 = token_from_line(NULL);
 170                 if (tok2 && parse_god_command_3arg(tok0, tok1, tok2, tok3))
 171                 {
 172                     return 1;
 173                 }
 174             }
 175         }
 176     }
 177     return 0;
 178 }
 179
 180
 181
 182 static void server_test()
 183 {
 184     char test[10 + 1 + 10 + 1 + 1];
 185     FILE * file = try_fopen(s[S_PATH_OUT], "r", __func__);
 186     try_fgets(test, 10 + 10 + 1 + 1, file, __func__);
 187     try_fclose(file, __func__);
 188     if (strcmp(test, world.server_test))
 189     {
 190         unset_cleanup_flag(CLEANUP_WORLDSTATE);
 191         unset_cleanup_flag(CLEANUP_OUT);
 192         unset_cleanup_flag(CLEANUP_IN);
 193         char * msg = "Server test string in server output file does not match. "
 194                      "This indicates that the current server process has been "
 195                      "superseded by another one.";
 196         exit_err(1, msg);
 197     }
 198 }
 199
 200
 201
 202 static void turn_over()
 203 {
 204     struct Thing * player = get_player();
 205     struct Thing * thing = player;
 206     uint16_t start_turn = world.turn;
 207     while (    0 < player->lifepoints
 208            || (0 == player->lifepoints && start_turn == world.turn))
 209     {
 210         if (!thing)
 211         {
 212             world.turn++;
 213             thing = world.things;
 214         }
 215         if (0 < thing->lifepoints)
 216         {
 217             if (0 == thing->command)
 218             {
 219                 if (thing == player)
 220                 {
 221                     break;
 222                 }
 223                 ai(thing);
 224             }
 225             thing->progress++;
 226             struct ThingAction * ta = get_thing_action(thing->command);
 227             if (thing->progress == ta->effort)
 228             {
 229                 ta->func(thing);
 230                 thing->command = 0;
 231                 thing->progress = 0;
 232             }
 233         }
 234         thing = thing->next;
 235     }
 236 }
 237
 238
 239
 240 extern void record(char * msg, uint8_t force)
 241 {
 242     static FILE * file_tmp = NULL;
 243     static time_t save_wait = 0;
 244     static char * path_tmp;
 245     if (!file_tmp)
 246     {
 247         path_tmp = build_temp_path(s[S_PATH_RECORD]);
 248         file_tmp = try_fopen(path_tmp, "w", __func__);
 249         if (!access(s[S_PATH_RECORD], F_OK))
 250         {
 251             FILE * file_read = try_fopen(s[S_PATH_RECORD], "r", __func__);
 252             uint32_t linemax = textfile_width(file_read);
 253             char * line = try_malloc(linemax + 1, __func__);
 254             while (try_fgets(line, linemax + 1, file_read, __func__))
 255             {
 256                 try_fwrite(line, strlen(line), 1, file_tmp, __func__);
 257             }
 258             free(line);
 259             try_fclose(file_read, __func__);
 260         }
 261     }
 262     if (msg)
 263     {
 264         try_fwrite(msg, strlen(msg), 1, file_tmp, __func__);
 265         try_fputc('\n', file_tmp, __func__);
 266     }
 267     if (force || time(NULL) > save_wait + 15)
 268     {
 269         save_wait = time(NULL);
 270         save_world();
 271         atomic_write_finish(file_tmp, s[S_PATH_RECORD], path_tmp);
 272         file_tmp = NULL;
 273     }
 274 }
 275
 276
 277
 278 extern void obey_msg(char * msg, uint8_t do_record, uint8_t do_verbose)
 279 {
 280     if (world.is_verbose && do_verbose)
 281     {
 282         exit_trouble(-1 == printf("Input: %s\n", msg), __func__, "printf");
 283     }
 284     set_err_line_options("Trouble with message: ", msg, 0);
 285     char * msg_copy = strdup(msg);
 286     char * tok0 = token_from_line(msg_copy);
 287     if (tok0)
 288     {
 289
 290         if (parse_command(tok0))
 291         {
 292             if (world.exists)
 293             {
 294                 world.do_update = 1;
 295             }
 296             if (do_record)
 297             {
 298                 record(msg, 0);
 299             }
 300             char * tokplus = token_from_line(NULL);
 301             err_line(!(!tokplus), "Too many arguments, ignoring overflow.");
 302             free(msg_copy);
 303             return;
 304         }
 305     }
 306     err_line(1, "Unknown command/argument or bad number of tokens.");
 307     free(msg_copy);
 308 }
 309
 310
 311
 312 extern uint8_t io_loop()
 313 {
 314     while (1)
 315     {
 316         char * msg = io_round();
 317         server_test();
 318         if (!msg)
 319         {
 320             continue;
 321         }
 322         if (world.is_verbose)
 323         {
 324             exit_trouble(-1 == printf("Input: %s\n", msg), __func__, "printf");
 325         }
 326         if (!strcmp("QUIT", msg))
 327         {
 328             free(msg);
 329             return 1;
 330         }
 331         if (!strcmp("PING", msg))
 332         {
 333             free(msg);
 334             char * pong = "PONG\n";
 335             try_fwrite(pong, strlen(pong), 1, world.file_out, __func__);
 336             fflush(world.file_out);
 337             continue;
 338         }
 339         if (world.replay)
 340         {
 341             free(msg);
 342             return 0;
 343         }
 344         obey_msg(msg, 1, 0);
 345         free(msg);
 346     }
 347 }