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         err_line(1, "No world exists in which to run player commands.");
  79         return 0;
  80     }
  81     return 1;
  82 }
  83
  84
  85
  86 static uint8_t parse_player_command_0arg(char * tok0)
  87 {
  88     struct Thing * player = get_player();
  89     if (   !strcmp(tok0, s[S_CMD_WAIT]) || !strcmp(tok0, s[S_CMD_PICKUP])
  90         || !strcmp(tok0, s[S_CMD_AI]))
  91     {
  92         if (player_commands_allowed())
  93         {
  94             if (!strcmp(tok0, s[S_CMD_AI]))
  95             {
  96                 ai(player);
  97             }
  98             else
  99             {
 100                 player->command = get_thing_action_id_by_name(tok0);
 101                 player->arg = 0;
 102             }
 103             turn_over();
 104         }
 105         return 1;
 106     }
 107     return 0;
 108 }
 109
 110
 111
 112 static uint8_t parse_player_command_1arg(char * tok0, char * tok1)
 113 {
 114     struct Thing * player = get_player();
 115     if (   (   parse_val(tok0, tok1, s[S_CMD_DROP], '8', (char *) &player->arg)
 116             || parse_val(tok0, tok1, s[S_CMD_USE], '8', (char *) &player->arg))
 117         && player_commands_allowed())
 118     {
 119         player->command = get_thing_action_id_by_name(tok0);
 120         turn_over();
 121     }
 122     else if (!strcmp(tok0, s[S_CMD_MOVE]) && player_commands_allowed())
 123     {
 124         char dir = '\0';
 125         if (!(   set_char_by_string_comparison(tok1, "east",       &dir, 'd')
 126               || set_char_by_string_comparison(tok1, "south-east", &dir, 'c')
 127               || set_char_by_string_comparison(tok1, "south-west", &dir, 'x')
 128               || set_char_by_string_comparison(tok1, "west",       &dir, 's')
 129               || set_char_by_string_comparison(tok1, "north-west", &dir, 'w')
 130               || set_char_by_string_comparison(tok1, "north-east", &dir, 'e')))
 131         {
 132             return 0;
 133         }
 134         player->arg = dir;
 135         player->command = get_thing_action_id_by_name(tok0);
 136         turn_over();
 137     }
 138     else
 139     {
 140         return 0;
 141     }
 142     return 1;
 143 }
 144
 145
 146
 147 static uint8_t parse_command(char * tok0)
 148 {
 149     if (parse_player_command_0arg(tok0))
 150     {
 151         return 1;
 152     }
 153     else
 154     {
 155         char * tok1 = token_from_line(NULL);
 156         if (tok1 && (   parse_player_command_1arg(tok0, tok1)
 157                      || parse_god_command_1arg(tok0, tok1)))
 158         {
 159             return 1;
 160         }
 161         else
 162         {
 163             char * tok2 = token_from_line(NULL);
 164             if (tok2 && parse_god_command_2arg(tok0, tok1, tok2))
 165             {
 166                 return 1;
 167             }
 168             else
 169             {
 170                 char * tok3 = token_from_line(NULL);
 171                 if (tok2 && parse_god_command_3arg(tok0, tok1, tok2, tok3))
 172                 {
 173                     return 1;
 174                 }
 175             }
 176         }
 177     }
 178     return 0;
 179 }
 180
 181
 182
 183 static void server_test()
 184 {
 185     char test[10 + 1 + 10 + 1 + 1];
 186     FILE * file = try_fopen(s[S_PATH_OUT], "r", __func__);
 187     try_fgets(test, 10 + 10 + 1 + 1, file, __func__);
 188     try_fclose(file, __func__);
 189     if (strcmp(test, world.server_test))
 190     {
 191         unset_cleanup_flag(CLEANUP_WORLDSTATE);
 192         unset_cleanup_flag(CLEANUP_OUT);
 193         unset_cleanup_flag(CLEANUP_IN);
 194         char * msg = "Server test string in server output file does not match. "
 195                      "This indicates that the current server process has been "
 196                      "superseded by another one.";
 197         exit_err(1, msg);
 198     }
 199 }
 200
 201
 202
 203 static void turn_over()
 204 {
 205     struct Thing * player = get_player();
 206     struct Thing * thing = player;
 207     uint16_t start_turn = world.turn;
 208     while (    0 < player->lifepoints
 209            || (0 == player->lifepoints && start_turn == world.turn))
 210     {
 211         if (NULL == thing)
 212         {
 213             world.turn++;
 214             thing = world.things;
 215         }
 216         if (0 < thing->lifepoints)
 217         {
 218             if (0 == thing->command)
 219             {
 220                 if (thing == player)
 221                 {
 222                     break;
 223                 }
 224                 ai(thing);
 225             }
 226             thing->progress++;
 227             struct ThingAction * ta = get_thing_action(thing->command);
 228             if (thing->progress == ta->effort)
 229             {
 230                 ta->func(thing);
 231                 thing->command = 0;
 232                 thing->progress = 0;
 233             }
 234         }
 235         thing = thing->next;
 236     }
 237 }
 238
 239
 240
 241 extern void record(char * msg, uint8_t force)
 242 {
 243     static FILE * file_tmp = NULL;
 244     static time_t save_wait = 0;
 245     static char * path_tmp;
 246     if (!file_tmp)
 247     {
 248         path_tmp = build_temp_path(s[S_PATH_RECORD]);
 249         file_tmp = try_fopen(path_tmp, "w", __func__);
 250         if (!access(s[S_PATH_RECORD], F_OK))
 251         {
 252             FILE * file_read = try_fopen(s[S_PATH_RECORD], "r", __func__);
 253             uint32_t linemax = textfile_width(file_read);
 254             char * line = try_malloc(linemax + 1, __func__);
 255             while (try_fgets(line, linemax + 1, file_read, __func__))
 256             {
 257                 try_fwrite(line, strlen(line), 1, file_tmp, __func__);
 258             }
 259             free(line);
 260             try_fclose(file_read, __func__);
 261         }
 262     }
 263     if (msg)
 264     {
 265         try_fwrite(msg, strlen(msg), 1, file_tmp, __func__);
 266         try_fputc('\n', file_tmp, __func__);
 267     }
 268     if (force || time(NULL) > save_wait + 15)
 269     {
 270         save_wait = time(NULL);
 271         save_world();
 272         atomic_write_finish(file_tmp, s[S_PATH_RECORD], path_tmp);
 273         file_tmp = NULL;
 274     }
 275 }
 276
 277
 278
 279 extern void obey_msg(char * msg, uint8_t do_record, uint8_t do_verbose)
 280 {
 281     if (world.is_verbose && do_verbose)
 282     {
 283         exit_trouble(-1 == printf("Input: %s\n", msg), __func__, "printf");
 284     }
 285     set_err_line_options("Trouble with message: ", msg, 0);
 286     char * msg_copy = strdup(msg);
 287     char * tok0 = token_from_line(msg_copy);
 288     if (NULL != tok0)
 289     {
 290
 291         if (parse_command(tok0))
 292         {
 293             if (world.exists)
 294             {
 295                 world.do_update = 1;
 296             }
 297             if (do_record)
 298             {
 299                 record(msg, 0);
 300             }
 301             char * tokplus = token_from_line(NULL);
 302             err_line(NULL != tokplus, "Too many arguments, ignoring overflow.");
 303             free(msg_copy);
 304             return;
 305         }
 306     }
 307     err_line(1, "Unknown command/argument or bad number of tokens.");
 308     free(msg_copy);
 309 }
 310
 311
 312
 313 extern uint8_t io_loop()
 314 {
 315     while (1)
 316     {
 317         char * msg = io_round();
 318         server_test();
 319         if (NULL == msg)
 320         {
 321             continue;
 322         }
 323         if (world.is_verbose)
 324         {
 325             exit_trouble(-1 == printf("Input: %s\n", msg), __func__, "printf");
 326         }
 327         if (!strcmp("QUIT", msg))
 328         {
 329             free(msg);
 330             return 1;
 331         }
 332         if (!strcmp("PING", msg))
 333         {
 334             free(msg);
 335             char * pong = "PONG\n";
 336             try_fwrite(pong, strlen(pong), 1, world.file_out, __func__);
 337             fflush(world.file_out);
 338             continue;
 339         }
 340         if (world.replay)
 341         {
 342             free(msg);
 343             return 0;
 344         }
 345         obey_msg(msg, 1, 0);
 346         free(msg);
 347     }
 348 }