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_1arg(),parse_god_command_2arg()*/
  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     {
  91         if (player_commands_allowed())
  92         {
  93             player->command = get_thing_action_id_by_name(tok0);
  94             player->arg = 0;
  95             turn_over();
  96         }
  97         return 1;
  98     }
  99     return 0;
 100 }
 101
 102
 103
 104 static uint8_t parse_player_command_1arg(char * tok0, char * tok1)
 105 {
 106     struct Thing * player = get_player();
 107     if (   (   parse_val(tok0, tok1, s[S_CMD_DROP], '8', (char *) &player->arg)
 108             || parse_val(tok0, tok1, s[S_CMD_USE], '8', (char *) &player->arg))
 109         && player_commands_allowed())
 110     {
 111         player->command = get_thing_action_id_by_name(tok0);
 112         turn_over();
 113     }
 114     else if (!strcmp(tok0, s[S_CMD_MOVE]) && player_commands_allowed())
 115     {
 116         char dir = '\0';
 117         if (!(   set_char_by_string_comparison(tok1, "east",       &dir, 'd')
 118               || set_char_by_string_comparison(tok1, "south-east", &dir, 'c')
 119               || set_char_by_string_comparison(tok1, "south-west", &dir, 'x')
 120               || set_char_by_string_comparison(tok1, "west",       &dir, 's')
 121               || set_char_by_string_comparison(tok1, "north-west", &dir, 'w')
 122               || set_char_by_string_comparison(tok1, "north-east", &dir, 'e')))
 123         {
 124             return 0;
 125         }
 126         player->arg = dir;
 127         player->command = get_thing_action_id_by_name(tok0);
 128         turn_over();
 129     }
 130     else
 131     {
 132         return 0;
 133     }
 134     return 1;
 135 }
 136
 137
 138
 139 static uint8_t parse_command(char * tok0)
 140 {
 141     if (parse_player_command_0arg(tok0))
 142     {
 143         return 1;
 144     }
 145     else
 146     {
 147         char * tok1 = token_from_line(NULL);
 148         if (tok1 && (   parse_player_command_1arg(tok0, tok1)
 149                      || parse_god_command_1arg(tok0, tok1)))
 150         {
 151             return 1;
 152         }
 153         else
 154         {
 155             char * tok2 = token_from_line(NULL);
 156             if (tok2 && parse_god_command_2arg(tok0, tok1, tok2))
 157             {
 158                 return 1;
 159             }
 160         }
 161     }
 162     return 0;
 163 }
 164
 165
 166
 167 static void server_test()
 168 {
 169     char test[10 + 1 + 10 + 1 + 1];
 170     FILE * file = try_fopen(s[S_PATH_OUT], "r", __func__);
 171     try_fgets(test, 10 + 10 + 1 + 1, file, __func__);
 172     try_fclose(file, __func__);
 173     if (strcmp(test, world.server_test))
 174     {
 175         unset_cleanup_flag(CLEANUP_WORLDSTATE);
 176         unset_cleanup_flag(CLEANUP_OUT);
 177         unset_cleanup_flag(CLEANUP_IN);
 178         char * msg = "Server test string in server output file does not match. "
 179                      "This indicates that the current server process has been "
 180                      "superseded by another one.";
 181         exit_err(1, msg);
 182     }
 183 }
 184
 185
 186
 187 static void turn_over()
 188 {
 189     struct Thing * player = get_player();
 190     struct Thing * thing = player;
 191     uint16_t start_turn = world.turn;
 192     while (    0 < player->lifepoints
 193            || (0 == player->lifepoints && start_turn == world.turn))
 194     {
 195         if (NULL == thing)
 196         {
 197             world.turn++;
 198             thing = world.things;
 199         }
 200         if (0 < thing->lifepoints)
 201         {
 202             if (0 == thing->command)
 203             {
 204                 if (thing == player)
 205                 {
 206                     break;
 207                 }
 208                 ai(thing);
 209             }
 210             thing->progress++;
 211             struct ThingAction * ta = get_thing_action(thing->command);
 212             if (thing->progress == ta->effort)
 213             {
 214                 ta->func(thing);
 215                 thing->command = 0;
 216                 thing->progress = 0;
 217             }
 218         }
 219         thing = thing->next;
 220     }
 221 }
 222
 223
 224
 225 extern void record(char * msg, uint8_t force)
 226 {
 227     static FILE * file_tmp = NULL;
 228     static time_t save_wait = 0;
 229     static char * path_tmp;
 230     if (!file_tmp)
 231     {
 232         path_tmp = build_temp_path(s[S_PATH_RECORD]);
 233         file_tmp = try_fopen(path_tmp, "w", __func__);
 234         if (!access(s[S_PATH_RECORD], F_OK))
 235         {
 236             FILE * file_read = try_fopen(s[S_PATH_RECORD], "r", __func__);
 237             uint32_t linemax = textfile_width(file_read);
 238             char * line = try_malloc(linemax + 1, __func__);
 239             while (try_fgets(line, linemax + 1, file_read, __func__))
 240             {
 241                 try_fwrite(line, strlen(line), 1, file_tmp, __func__);
 242             }
 243             free(line);
 244             try_fclose(file_read, __func__);
 245         }
 246     }
 247     if (msg)
 248     {
 249         try_fwrite(msg, strlen(msg), 1, file_tmp, __func__);
 250         try_fputc('\n', file_tmp, __func__);
 251     }
 252     if (force || time(NULL) > save_wait + 15)
 253     {
 254         save_wait = time(NULL);
 255         save_world();
 256         atomic_write_finish(file_tmp, s[S_PATH_RECORD], path_tmp);
 257         file_tmp = NULL;
 258     }
 259 }
 260
 261
 262
 263 extern void obey_msg(char * msg, uint8_t do_record, uint8_t do_verbose)
 264 {
 265     if (world.is_verbose && do_verbose)
 266     {
 267         exit_trouble(-1 == printf("Input: %s\n", msg), __func__, "printf");
 268     }
 269     set_err_line_options("Trouble with message: ", msg, 0);
 270     char * msg_copy = strdup(msg);
 271     char * tok0 = token_from_line(msg_copy);
 272     if (NULL != tok0)
 273     {
 274
 275         if (parse_command(tok0))
 276         {
 277             if (world.exists)
 278             {
 279                 world.do_update = 1;
 280             }
 281             if (do_record)
 282             {
 283                 record(msg, 0);
 284             }
 285             char * tokplus = token_from_line(NULL);
 286             err_line(NULL != tokplus, "Too many arguments, ignoring overflow.");
 287             free(msg_copy);
 288             return;
 289         }
 290     }
 291     err_line(1, "Unknown command/argument or bad number of tokens.");
 292     free(msg_copy);
 293 }
 294
 295
 296
 297 extern uint8_t io_loop()
 298 {
 299     while (1)
 300     {
 301         char * msg = io_round();
 302         server_test();
 303         if (NULL == msg)
 304         {
 305             continue;
 306         }
 307         if (world.is_verbose)
 308         {
 309             exit_trouble(-1 == printf("Input: %s\n", msg), __func__, "printf");
 310         }
 311         if (!strcmp("QUIT", msg))
 312         {
 313             free(msg);
 314             return 1;
 315         }
 316         if (!strcmp("PING", msg))
 317         {
 318             free(msg);
 319             char * pong = "PONG\n";
 320             try_fwrite(pong, strlen(pong), 1, world.file_out, __func__);
 321             fflush(world.file_out);
 322             continue;
 323         }
 324         if (world.replay)
 325         {
 326             free(msg);
 327             return 0;
 328         }
 329         obey_msg(msg, 1, 0);
 330         free(msg);
 331     }
 332 }