plomlompom.com Git - plomrogue/blob - plomrogue-server.py

   1 import argparse
   2 import errno
   3 import os
   4 import shlex
   5 import shutil
   6 import time
   7 import ctypes
   8
   9
  10 class RandomnessIO:
  11     """"Interface to libplomrogue's pseudo-randomness generator."""
  12
  13     def set_seed(self, seed):
  14         libpr.seed_rrand(1, seed)
  15
  16     def get_seed(self):
  17         return libpr.seed_rrand(0, 0)
  18
  19     def next(self):
  20         return libpr.rrand()
  21
  22     seed = property(get_seed, set_seed)
  23
  24
  25 def prep_library():
  26     """Prepare ctypes library at ./libplomrogue.so"""
  27     libpath = ("./libplomrogue.so")
  28     if not os.access(libpath, os.F_OK):
  29         raise SystemExit("No library " + libpath + ", run ./compile.sh first?")
  30     libpr = ctypes.cdll.LoadLibrary(libpath)
  31     libpr.seed_rrand.argtypes = [ctypes.c_uint8, ctypes.c_uint32]
  32     libpr.seed_rrand.restype = ctypes.c_uint32
  33     libpr.rrand.argtypes = []
  34     libpr.rrand.restype = ctypes.c_uint16
  35     libpr.set_maplength.argtypes = [ctypes.c_uint16]
  36     libpr.mv_yx_in_dir_legal_wrap.argtypes = [ctypes.c_char, ctypes.c_uint8,
  37                                               ctypes.c_uint8]
  38     libpr.mv_yx_in_dir_legal_wrap.restype = ctypes.c_uint8
  39     libpr.result_y.restype = ctypes.c_uint8
  40     libpr.result_x.restype = ctypes.c_uint8
  41     libpr.set_maplength(world_db["MAP_LENGTH"])
  42     libpr.build_fov_map.argtypes = [ctypes.c_uint8, ctypes.c_uint8,
  43                                     ctypes.c_char_p, ctypes.c_char_p]
  44     libpr.build_fov_map.restype = ctypes.c_uint8
  45     return libpr
  46
  47
  48 def strong_write(file, string):
  49     """Apply write(string), flush(), and os.fsync() to file."""
  50     file.write(string)
  51     file.flush()
  52     os.fsync(file)
  53
  54
  55 def setup_server_io():
  56     """Fill IO files DB with proper file( path)s. Write process IO test string.
  57
  58     Ensure IO files directory at server/. Remove any old input file if found.
  59     Set up new input file for reading, and new output file for writing. Start
  60     output file with process hash line of format PID + " " + floated UNIX time
  61     (io_db["teststring"]). Raise SystemExit if file is found at path of either
  62     record or save file plus io_db["tmp_suffix"].
  63     """
  64     def detect_atomic_leftover(path, tmp_suffix):
  65         path_tmp = path + tmp_suffix
  66         msg = "Found file '" + path_tmp + "' that may be a leftover from an " \
  67               "aborted previous attempt to write '" + path + "'. Aborting " \
  68              "until matter is resolved by removing it from its current path."
  69         if os.access(path_tmp, os.F_OK):
  70             raise SystemExit(msg)
  71     io_db["teststring"] = str(os.getpid()) + " " + str(time.time())
  72     os.makedirs(io_db["path_server"], exist_ok=True)
  73     io_db["file_out"] = open(io_db["path_out"], "w")
  74     strong_write(io_db["file_out"], io_db["teststring"] + "\n")
  75     if os.access(io_db["path_in"], os.F_OK):
  76         os.remove(io_db["path_in"])
  77     io_db["file_in"] = open(io_db["path_in"], "w")
  78     io_db["file_in"].close()
  79     io_db["file_in"] = open(io_db["path_in"], "r")
  80     detect_atomic_leftover(io_db["path_save"], io_db["tmp_suffix"])
  81     detect_atomic_leftover(io_db["path_record"], io_db["tmp_suffix"])
  82
  83
  84 def cleanup_server_io():
  85     """Close and (if io_db["kicked_by_rival"] false) remove files in io_db."""
  86     def helper(file_key, path_key):
  87         if file_key in io_db:
  88             io_db[file_key].close()
  89             if not io_db["kicked_by_rival"] \
  90                and os.access(io_db[path_key], os.F_OK):
  91                 os.remove(io_db[path_key])
  92     helper("file_out", "path_out")
  93     helper("file_in", "path_in")
  94     helper("file_worldstate", "path_worldstate")
  95     if "file_record" in io_db:
  96         io_db["file_record"].close()
  97
  98
  99 def obey(command, prefix, replay=False, do_record=False):
 100     """Call function from commands_db mapped to command's first token.
 101
 102     Tokenize command string with shlex.split(comments=True). If replay is set,
 103     a non-meta command from the commands_db merely triggers obey() on the next
 104     command from the records file. If not, non-meta commands set
 105     io_db["worldstate_updateable"] to world_db["WORLD_EXISTS"], and, if
 106     do_record is set, are recorded via record(), and save_world() is called.
 107     The prefix string is inserted into the server's input message between its
 108     beginning 'input ' & ':'. All activity is preceded by a server_test() call.
 109     """
 110     server_test()
 111     print("input " + prefix + ": " + command)
 112     try:
 113         tokens = shlex.split(command, comments=True)
 114     except ValueError as err:
 115         print("Can't tokenize command string: " + str(err) + ".")
 116         return
 117     if len(tokens) > 0 and tokens[0] in commands_db \
 118        and len(tokens) == commands_db[tokens[0]][0] + 1:
 119         if commands_db[tokens[0]][1]:
 120             commands_db[tokens[0]][2](*tokens[1:])
 121         elif replay:
 122             print("Due to replay mode, reading command as 'go on in record'.")
 123             line = io_db["file_record"].readline()
 124             if len(line) > 0:
 125                 obey(line.rstrip(), io_db["file_record"].prefix
 126                      + str(io_db["file_record"].line_n))
 127                 io_db["file_record"].line_n = io_db["file_record"].line_n + 1
 128             else:
 129                 print("Reached end of record file.")
 130         else:
 131             commands_db[tokens[0]][2](*tokens[1:])
 132             if do_record:
 133                 record(command)
 134                 save_world()
 135             io_db["worldstate_updateable"] = world_db["WORLD_ACTIVE"]
 136     elif 0 != len(tokens):
 137         print("Invalid command/argument, or bad number of tokens.")
 138
 139
 140 def atomic_write(path, text, do_append=False):
 141     """Atomic write of text to file at path, appended if do_append is set."""
 142     path_tmp = path + io_db["tmp_suffix"]
 143     mode = "w"
 144     if do_append:
 145         mode = "a"
 146         if os.access(path, os.F_OK):
 147             shutil.copyfile(path, path_tmp)
 148     file = open(path_tmp, mode)
 149     strong_write(file, text)
 150     file.close()
 151     if os.access(path, os.F_OK):
 152         os.remove(path)
 153     os.rename(path_tmp, path)
 154
 155
 156 def record(command):
 157     """Append command string plus newline to record file. (Atomic.)"""
 158     # This misses some optimizations from the original record(), namely only
 159     # finishing the atomic write with expensive flush() and fsync() every 15
 160     # seconds unless explicitely forced. Implement as needed.
 161     atomic_write(io_db["path_record"], command + "\n", do_append=True)
 162
 163
 164 def save_world():
 165     """Save all commands needed to reconstruct current world state."""
 166     # TODO: Misses same optimizations as record() from the original record().
 167
 168     def quote(string):
 169         string = string.replace("\u005C", '\u005C\u005C')
 170         return '"' + string.replace('"', '\u005C"') + '"'
 171
 172     def mapsetter(key):
 173         def helper(id):
 174             string = ""
 175             if world_db["Things"][id][key]:
 176                 map = world_db["Things"][id][key]
 177                 length = world_db["MAP_LENGTH"]
 178                 for i in range(length):
 179                     line = map[i * length:(i * length) + length].decode()
 180                     string = string + key + " " + str(i) + " " + quote(line) \
 181                              + "\n"
 182             return string
 183         return helper
 184
 185     def memthing(id):
 186         string = ""
 187         for memthing in world_db["Things"][id]["T_MEMTHING"]:
 188             string = string + "T_MEMTHING " + str(memthing[0]) + " " + \
 189                      str(memthing[1]) + " " + str(memthing[2]) + "\n"
 190         return string
 191
 192     def helper(category, id_string, special_keys={}):
 193         string = ""
 194         for id in world_db[category]:
 195             string = string + id_string + " " + str(id) + "\n"
 196             for key in world_db[category][id]:
 197                 if not key in special_keys:
 198                     x = world_db[category][id][key]
 199                     argument = quote(x) if str == type(x) else str(x)
 200                     string = string + key + " " + argument + "\n"
 201                 elif special_keys[key]:
 202                     string = string + special_keys[key](id)
 203         return string
 204
 205     string = ""
 206     for key in world_db:
 207         if dict != type(world_db[key]) and key != "MAP":
 208             string = string + key + " " + str(world_db[key]) + "\n"
 209     string = string + helper("ThingActions", "TA_ID")
 210     string = string + helper("ThingTypes", "TT_ID", {"TT_CORPSE_ID": False})
 211     for id in world_db["ThingTypes"]:
 212         string = string + "TT_ID " + str(id) + "\n" + "TT_CORPSE_ID " + \
 213                  str(world_db["ThingTypes"][id]["TT_CORPSE_ID"]) + "\n"
 214     string = string + helper("Things", "T_ID",
 215                              {"T_CARRIES": False, "carried": False,
 216                               "T_MEMMAP": mapsetter("T_MEMMAP"),
 217                               "T_MEMTHING": memthing, "fovmap": False,
 218                               "T_MEMDEPTHMAP": mapsetter("T_MEMDEPTHMAP")})
 219     for id in world_db["Things"]:
 220         if [] != world_db["Things"][id]["T_CARRIES"]:
 221             string = string + "T_ID " + str(id) + "\n"
 222             for carried_id in world_db["Things"][id]["T_CARRIES"]:
 223                 string = string + "T_CARRIES " + str(carried_id) + "\n"
 224     string = string + "SEED_RANDOMNESS " + str(rand.seed) + "\n" + \
 225              "WORLD_ACTIVE " + str(world_db["WORLD_ACTIVE"])
 226     atomic_write(io_db["path_save"], string)
 227
 228
 229 def obey_lines_in_file(path, name, do_record=False):
 230     """Call obey() on each line of path's file, use name in input prefix."""
 231     file = open(path, "r")
 232     line_n = 1
 233     for line in file.readlines():
 234         obey(line.rstrip(), name + "file line " + str(line_n),
 235              do_record=do_record)
 236         line_n = line_n + 1
 237     file.close()
 238
 239
 240 def parse_command_line_arguments():
 241     """Return settings values read from command line arguments."""
 242     parser = argparse.ArgumentParser()
 243     parser.add_argument('-s', nargs='?', type=int, dest='replay', const=1,
 244                         action='store')
 245     opts, unknown = parser.parse_known_args()
 246     return opts
 247
 248
 249 def server_test():
 250     """Ensure valid server out file belonging to current process.
 251
 252     This is done by comparing io_db["teststring"] to what's found at the start
 253     of the current file at io_db["path_out"]. On failure, set
 254     io_db["kicked_by_rival"] and raise SystemExit.
 255     """
 256     if not os.access(io_db["path_out"], os.F_OK):
 257         raise SystemExit("Server output file has disappeared.")
 258     file = open(io_db["path_out"], "r")
 259     test = file.readline().rstrip("\n")
 260     file.close()
 261     if test != io_db["teststring"]:
 262         io_db["kicked_by_rival"] = True
 263         msg = "Server test string in server output file does not match. This" \
 264               " indicates that the current server process has been " \
 265               "superseded by another one."
 266         raise SystemExit(msg)
 267
 268
 269 def read_command():
 270     """Return next newline-delimited command from server in file.
 271
 272     Keep building return string until a newline is encountered. Pause between
 273     unsuccessful reads, and after too much waiting, run server_test().
 274     """
 275     wait_on_fail = 0.03333
 276     max_wait = 5
 277     now = time.time()
 278     command = ""
 279     while True:
 280         add = io_db["file_in"].readline()
 281         if len(add) > 0:
 282             command = command + add
 283             if len(command) > 0 and "\n" == command[-1]:
 284                 command = command[:-1]
 285                 break
 286         else:
 287             time.sleep(wait_on_fail)
 288             if now + max_wait < time.time():
 289                 server_test()
 290                 now = time.time()
 291     return command
 292
 293
 294 def try_worldstate_update():
 295     """Write worldstate file if io_db["worldstate_updateable"] is set."""
 296     if io_db["worldstate_updateable"]:
 297
 298         def draw_visible_Things(map, run):
 299             for id in world_db["Things"]:
 300                 type = world_db["Things"][id]["T_TYPE"]
 301                 consumable = world_db["ThingTypes"][type]["TT_CONSUMABLE"]
 302                 alive = world_db["ThingTypes"][type]["TT_LIFEPOINTS"]
 303                 if (0 == run and not consumable and not alive) \
 304                    or (1 == run and consumable and not alive) \
 305                    or (2 == run and alive):
 306                     y = world_db["Things"][id]["T_POSY"]
 307                     x = world_db["Things"][id]["T_POSX"]
 308                     fovflag = world_db["Things"][0]["fovmap"][(y * length) + x]
 309                     if 'v' == chr(fovflag):
 310                         c = world_db["ThingTypes"][type]["TT_SYMBOL"]
 311                         map[(y * length) + x] = ord(c)
 312
 313         def write_map(string, map):
 314             for i in range(length):
 315                 line = map[i * length:(i * length) + length].decode()
 316                 string = string + line + "\n"
 317             return string
 318
 319         inventory = ""
 320         if [] == world_db["Things"][0]["T_CARRIES"]:
 321             inventory = "(none)\n"
 322         else:
 323             for id in world_db["Things"][0]["T_CARRIES"]:
 324                 type_id = world_db["Things"][id]["T_TYPE"]
 325                 name = world_db["ThingTypes"][type_id]["TT_NAME"]
 326                 inventory = inventory + name + "\n"
 327         string = str(world_db["TURN"]) + "\n" + \
 328                  str(world_db["Things"][0]["T_LIFEPOINTS"]) + "\n" + \
 329                  str(world_db["Things"][0]["T_SATIATION"]) + "\n" + \
 330                  inventory + "%\n" + \
 331                  str(world_db["Things"][0]["T_POSY"]) + "\n" + \
 332                  str(world_db["Things"][0]["T_POSX"]) + "\n" + \
 333                  str(world_db["MAP_LENGTH"]) + "\n"
 334         length = world_db["MAP_LENGTH"]
 335         fov = bytearray(b' ' * (length ** 2))
 336         for pos in range(length ** 2):
 337             if 'v' == chr(world_db["Things"][0]["fovmap"][pos]):
 338                 fov[pos] = world_db["MAP"][pos]
 339         for i in range(3):
 340             draw_visible_Things(fov, i)
 341         string = write_map(string, fov)
 342         mem = world_db["Things"][0]["T_MEMMAP"][:]
 343         for i in range(2):
 344             for mt in world_db["Things"][0]["T_MEMTHING"]:
 345                 consumable = world_db["ThingTypes"][mt[0]]["TT_CONSUMABLE"]
 346                 if (i == 0 and not consumable) or (i == 1 and consumable):
 347                     c = world_db["ThingTypes"][mt[0]]["TT_SYMBOL"]
 348                     mem[(mt[1] * length) + mt[2]] = ord(c)
 349         string = write_map(string, mem)
 350         atomic_write(io_db["path_worldstate"], string)
 351         strong_write(io_db["file_out"], "WORLD_UPDATED\n")
 352         io_db["worldstate_updateable"] = False
 353
 354
 355 def replay_game():
 356     """Replay game from record file.
 357
 358     Use opts.replay as breakpoint turn to which to replay automatically before
 359     switching to manual input by non-meta commands in server input file
 360     triggering further reads of record file. Ensure opts.replay is at least 1.
 361     Run try_worldstate_update() before each interactive obey()/read_command().
 362     """
 363     if opts.replay < 1:
 364         opts.replay = 1
 365     print("Replay mode. Auto-replaying up to turn " + str(opts.replay) +
 366           " (if so late a turn is to be found).")
 367     if not os.access(io_db["path_record"], os.F_OK):
 368         raise SystemExit("No record file found to replay.")
 369     io_db["file_record"] = open(io_db["path_record"], "r")
 370     io_db["file_record"].prefix = "record file line "
 371     io_db["file_record"].line_n = 1
 372     while world_db["TURN"] < opts.replay:
 373         line = io_db["file_record"].readline()
 374         if "" == line:
 375             break
 376         obey(line.rstrip(), io_db["file_record"].prefix
 377              + str(io_db["file_record"].line_n))
 378         io_db["file_record"].line_n = io_db["file_record"].line_n + 1
 379     while True:
 380         try_worldstate_update()
 381         obey(read_command(), "in file", replay=True)
 382
 383
 384 def play_game():
 385     """Play game by server input file commands. Before, load save file found.
 386
 387     If no save file is found, a new world is generated from the commands in the
 388     world config plus a 'MAKE WORLD [current Unix timestamp]'. Record this
 389     command and all that follow via the server input file. Run
 390     try_worldstate_update() before each interactive obey()/read_command().
 391     """
 392     if os.access(io_db["path_save"], os.F_OK):
 393         obey_lines_in_file(io_db["path_save"], "save")
 394     else:
 395         if not os.access(io_db["path_worldconf"], os.F_OK):
 396             msg = "No world config file from which to start a new world."
 397             raise SystemExit(msg)
 398         obey_lines_in_file(io_db["path_worldconf"], "world config ",
 399                            do_record=True)
 400         obey("MAKE_WORLD " + str(int(time.time())), "in file", do_record=True)
 401     while True:
 402         try_worldstate_update()
 403         obey(read_command(), "in file", do_record=True)
 404
 405
 406 def remake_map():
 407     """(Re-)make island map.
 408
 409     Let "~" represent water, "." land, "X" trees: Build island shape randomly,
 410     start with one land cell in the middle, then go into cycle of repeatedly
 411     selecting a random sea cell and transforming it into land if it is neighbor
 412     to land. The cycle ends when a land cell is due to be created at the map's
 413     border. Then put some trees on the map (TODO: more precise algorithm desc).
 414     """
 415     def is_neighbor(coordinates, type):
 416         y = coordinates[0]
 417         x = coordinates[1]
 418         length = world_db["MAP_LENGTH"]
 419         ind = y % 2
 420         diag_west = x + (ind > 0)
 421         diag_east = x + (ind < (length - 1))
 422         pos = (y * length) + x
 423         if (y > 0 and diag_east
 424             and type == chr(world_db["MAP"][pos - length + ind])) \
 425            or (x < (length - 1)
 426                and type == chr(world_db["MAP"][pos + 1])) \
 427            or (y < (length - 1) and diag_east
 428                and type == chr(world_db["MAP"][pos + length + ind])) \
 429            or (y > 0 and diag_west
 430                and type == chr(world_db["MAP"][pos - length - (not ind)])) \
 431            or (x > 0
 432                and type == chr(world_db["MAP"][pos - 1])) \
 433            or (y < (length - 1) and diag_west
 434                and type == chr(world_db["MAP"][pos + length - (not ind)])):
 435             return True
 436         return False
 437     store_seed = rand.seed
 438     world_db["MAP"] = bytearray(b'~' * (world_db["MAP_LENGTH"] ** 2))
 439     length = world_db["MAP_LENGTH"]
 440     add_half_width = (not (length % 2)) * int(length / 2)
 441     world_db["MAP"][int((length ** 2) / 2) + add_half_width] = ord(".")
 442     while (1):
 443         y = rand.next() % length
 444         x = rand.next() % length
 445         pos = (y * length) + x
 446         if "~" == chr(world_db["MAP"][pos]) and is_neighbor((y, x), "."):
 447             if y == 0 or y == (length - 1) or x == 0 or x == (length - 1):
 448                 break
 449             world_db["MAP"][pos] = ord(".")
 450     n_trees = int((length ** 2) / 16)
 451     i_trees = 0
 452     while (i_trees <= n_trees):
 453         single_allowed = rand.next() % 32
 454         y = rand.next() % length
 455         x = rand.next() % length
 456         pos = (y * length) + x
 457         if "." == chr(world_db["MAP"][pos]) \
 458           and ((not single_allowed) or is_neighbor((y, x), "X")):
 459             world_db["MAP"][pos] = ord("X")
 460             i_trees += 1
 461     rand.seed = store_seed
 462     # This all-too-precise replica of the original C code misses iter_limit().
 463
 464
 465 def update_map_memory(t):
 466     """Update t's T_MEMMAP with what's in its FOV now,age its T_MEMMEPTHMAP."""
 467     if not t["T_MEMMAP"]:
 468         t["T_MEMMAP"] = bytearray(b' ' * (world_db["MAP_LENGTH"] ** 2))
 469     if not t["T_MEMDEPTHMAP"]:
 470         t["T_MEMDEPTHMAP"] = bytearray(b' ' * (world_db["MAP_LENGTH"] ** 2))
 471     for pos in range(world_db["MAP_LENGTH"] ** 2):
 472         if "v" == chr(t["fovmap"][pos]):
 473             t["T_MEMDEPTHMAP"][pos] = ord("0")
 474             if " " == chr(t["T_MEMMAP"][pos]):
 475                 t["T_MEMMAP"][pos] = world_db["MAP"][pos]
 476             continue
 477         if ord('0') <= t["T_MEMDEPTHMAP"][pos] \
 478            and ord('9') >= t["T_MEMDEPTHMAP"][pos] \
 479            and not rand.next() % (2 ** (t["T_MEMDEPTHMAP"][pos] - 48)):
 480             t["T_MEMDEPTHMAP"][pos] += 1
 481     for mt in [mt for mt in t["T_MEMTHING"]
 482                if "v" == chr(t["fovmap"][(mt[1] * world_db["MAP_LENGTH"])
 483                                          + mt[2]])]:
 484             t["T_MEMTHING"].remove(mt)
 485     for id in world_db["Things"]:
 486         type = world_db["Things"][id]["T_TYPE"]
 487         if not world_db["ThingTypes"][type]["TT_LIFEPOINTS"]:
 488             y = world_db["Things"][id]["T_POSY"]
 489             x = world_db["Things"][id]["T_POSX"]
 490             if "v" == chr(t["fovmap"][(y * world_db["MAP_LENGTH"]) + x]):
 491                 t["T_MEMTHING"].append((type, y, x))
 492
 493
 494 def set_world_inactive():
 495     """Set world_db["WORLD_ACTIVE"] to 0 and remove worldstate file."""
 496     server_test()
 497     if os.access(io_db["path_worldstate"], os.F_OK):
 498         os.remove(io_db["path_worldstate"])
 499     world_db["WORLD_ACTIVE"] = 0
 500
 501
 502 def integer_test(val_string, min, max):
 503     """Return val_string if possible integer >= min and <= max, else None."""
 504     try:
 505         val = int(val_string)
 506         if val < min or val > max:
 507             raise ValueError
 508         return val
 509     except ValueError:
 510         print("Ignoring: Please use integer >= " + str(min) + " and <= " +
 511               str(max) + ".")
 512         return None
 513
 514
 515 def setter(category, key, min, max):
 516     """Build setter for world_db([category + "s"][id])[key] to >=min/<=max."""
 517     if category is None:
 518         def f(val_string):
 519             val = integer_test(val_string, min, max)
 520             if None != val:
 521                 world_db[key] = val
 522     else:
 523         if category == "Thing":
 524             id_store = command_tid
 525             decorator = test_Thing_id
 526         elif category == "ThingType":
 527             id_store = command_ttid
 528             decorator = test_ThingType_id
 529         elif category == "ThingAction":
 530             id_store = command_taid
 531             decorator = test_ThingAction_id
 532
 533         @decorator
 534         def f(val_string):
 535             val = integer_test(val_string, min, max)
 536             if None != val:
 537                 world_db[category + "s"][id_store.id][key] = val
 538     return f
 539
 540
 541 def build_fov_map(t):
 542     """Build Thing's FOV map."""
 543     t["fovmap"] = bytearray(b'v' * (world_db["MAP_LENGTH"] ** 2))
 544     maptype = ctypes.c_char * len(world_db["MAP"])
 545     test = libpr.build_fov_map(t["T_POSY"], t["T_POSX"],
 546                                maptype.from_buffer(t["fovmap"]),
 547                                maptype.from_buffer(world_db["MAP"]))
 548     if test:
 549         raise RuntimeError("Malloc error in build_fov_Map().")
 550
 551
 552 def decrement_lifepoints(t):
 553     """Decrement t's lifepoints by 1, and if to zero, corpse it.
 554
 555     If t is the player avatar, only blank its fovmap, so that the client may
 556     still display memory data. On non-player things, erase fovmap and memory.
 557     """
 558     t["T_LIFEPOINTS"] -= 1
 559     if 0 == t["T_LIFEPOINTS"]:
 560         t["T_TYPE"] = world_db["ThingTypes"][t["T_TYPE"]]["TT_CORPSE_ID"]
 561         if world_db["Things"][0] == t:
 562             t["fovmap"] = bytearray(b' ' * (world_db["MAP_LENGTH"] ** 2))
 563             strong_write(io_db["file_out"], "LOG You die.\n")
 564         else:
 565             t["fovmap"] = False
 566             t["T_MEMMAP"] = False
 567             t["T_MEMDEPTHMAP"] = False
 568             t["T_MEMTHING"] = []
 569             strong_write(io_db["file_out"], "LOG It dies.\n")
 570
 571
 572 def mv_yx_in_dir_legal(dir, y, x):
 573     """Wrapper around libpr.mv_yx_in_dir_legal to simplify its use."""
 574     dir_c = dir.encode("ascii")[0]
 575     test = libpr.mv_yx_in_dir_legal_wrap(dir_c, y, x)
 576     if -1 == test:
 577         raise RuntimeError("Too much wrapping in mv_yx_in_dir_legal_wrap()!")
 578     return (test, libpr.result_y(), libpr.result_x())
 579
 580
 581 def actor_wait(t):
 582     """Make t do nothing (but loudly, if player avatar)."""
 583     if t == world_db["Things"][0]:
 584         strong_write(io_db["file_out"], "LOG You wait.\n")
 585
 586
 587 def actor_move(t):
 588     """If passable, move/collide(=attack) thing into T_ARGUMENT's direction."""
 589     passable = False
 590     move_result = mv_yx_in_dir_legal(t["T_ARGUMENT"], t["T_POSY"], t["T_POSX"])
 591     if 1 == move_result[0]:
 592         pos = (move_result[1] * world_db["MAP_LENGTH"]) + move_result[2]
 593         passable = "." == chr(world_db["MAP"][pos])
 594         hitted = [id for id in world_db["Things"]
 595                   if world_db["Things"][id] != t
 596                   if world_db["Things"][id]["T_LIFEPOINTS"]
 597                   if world_db["Things"][id]["T_POSY"] == move_result[1]
 598                   if world_db["Things"][id]["T_POSX"] == move_result[2]]
 599         if len(hitted):
 600             hit_id = hitted[0]
 601             hitter_name = world_db["ThingTypes"][t["T_TYPE"]]["TT_NAME"]
 602             hitter = "You" if t == world_db["Things"][0] else hitter_name
 603             hitted_type = world_db["Things"][hit_id]["T_TYPE"]
 604             hitted_name = world_db["ThingTypes"][hitted_type]["TT_NAME"]
 605             hitted = "you" if hit_id == 0 else hitted_name
 606             verb = " wound " if hitter == "You" else " wounds "
 607             strong_write(io_db["file_out"], "LOG " + hitter + verb + hitted +
 608                                             ".\n")
 609             decrement_lifepoints(world_db["Things"][hit_id])
 610             return
 611     dir = [dir for dir in directions_db
 612            if directions_db[dir] == t["T_ARGUMENT"]][0]
 613     if passable:
 614         t["T_POSY"] = move_result[1]
 615         t["T_POSX"] = move_result[2]
 616         for id in t["T_CARRIES"]:
 617             world_db["Things"][id]["T_POSY"] = move_result[1]
 618             world_db["Things"][id]["T_POSX"] = move_result[2]
 619         build_fov_map(t)
 620         strong_write(io_db["file_out"], "LOG You move " + dir + ".\n")
 621     else:
 622         strong_write(io_db["file_out"], "LOG You fail to move " + dir + ".\n")
 623
 624
 625 def actor_pick_up(t):
 626     """Make t pick up (topmost?) Thing from ground into inventory."""
 627     # Topmostness is actually not defined so far.
 628     ids = [id for id in world_db["Things"] if world_db["Things"][id] != t
 629            if not world_db["Things"][id]["carried"]
 630            if world_db["Things"][id]["T_POSY"] == t["T_POSY"]
 631            if world_db["Things"][id]["T_POSX"] == t["T_POSX"]]
 632     if len(ids):
 633         world_db["Things"][ids[0]]["carried"] = True
 634         t["T_CARRIES"].append(ids[0])
 635         if t == world_db["Things"][0]:
 636             strong_write(io_db["file_out"], "LOG You pick up an object.\n")
 637     elif t == world_db["Things"][0]:
 638         err = "You try to pick up an object, but there is none."
 639         strong_write(io_db["file_out"], "LOG " + err + "\n")
 640
 641
 642 def actor_drop(t):
 643     """Make t rop Thing from inventory to ground indexed by T_ARGUMENT."""
 644     # TODO: Handle case where T_ARGUMENT matches nothing.
 645     if len(t["T_CARRIES"]):
 646         id = t["T_CARRIES"][t["T_ARGUMENT"]]
 647         t["T_CARRIES"].remove(id)
 648         world_db["Things"][id]["carried"] = False
 649         if t == world_db["Things"][0]:
 650             strong_write(io_db["file_out"], "LOG You drop an object.\n")
 651     elif t == world_db["Things"][0]:
 652         err = "You try to drop an object, but you own none."
 653         strong_write(io_db["file_out"], "LOG " + err + "\n")
 654
 655
 656 def actor_use(t):
 657     """Make t use (for now: consume) T_ARGUMENT-indexed Thing in inventory."""
 658     # Original wrongly featured lifepoints increase through consumable!
 659     # TODO: Handle case where T_ARGUMENT matches nothing.
 660     if len(t["T_CARRIES"]):
 661         id = t["T_CARRIES"][t["T_ARGUMENT"]]
 662         type = world_db["Things"][id]["T_TYPE"]
 663         if world_db["ThingTypes"][type]["TT_CONSUMABLE"]:
 664             t["T_CARRIES"].remove(id)
 665             del world_db["Things"][id]
 666             t["T_SATIATION"] += world_db["ThingTypes"][type]["TT_CONSUMABLE"]
 667             strong_write(io_db["file_out"], "LOG You consume this object.\n")
 668         else:
 669             strong_write(io_db["file_out"], "LOG You try to use this object," +
 670                                             "but fail.\n")
 671     else:
 672         strong_write(io_db["file_out"], "LOG You try to use an object, but " +
 673                                         "you own none.\n")
 674
 675
 676 def thingproliferation(t):
 677     """To chance of 1/TT_PROLIFERATE, create t offspring in neighbor cell.
 678
 679     Naturally only works with TT_PROLIFERATE > 0. The neighbor cell must be
 680     passable and not be inhabited by a Thing of the same type, or, if Thing is
 681     animate, any other animate Thing. If there are several map cell candidates,
 682     one is selected randomly.
 683     """
 684     def test_cell(t, y, x):
 685         if "." == chr(world_db["MAP"][(y * world_db["MAP_LENGTH"]) + x]):
 686             for id in [id for id in world_db["Things"]
 687                        if y == world_db["Things"][id]["T_POSY"]
 688                        if x == world_db["Things"][id]["T_POSX"]
 689                        if (t["T_TYPE"] == world_db["Things"][id]["T_TYPE"])
 690                        or (t["T_LIFEPOINTS"] and
 691                            world_db["Things"][id]["T_LIFEPOINTS"])]:
 692                 return False
 693             return True
 694         return False
 695     prolscore = world_db["ThingTypes"][t["T_TYPE"]]["TT_PROLIFERATE"]
 696     if prolscore and (1 == prolscore or 1 == (rand.next() % prolscore)):
 697         candidates = []
 698         for dir in [directions_db[key] for key in directions_db]:
 699             mv_result = mv_yx_in_dir_legal(dir, t["T_POSY"], t["T_POSX"])
 700             if mv_result[0] and test_cell(t, mv_result[1], mv_result[2]):
 701                 candidates.append((mv_result[1], mv_result[2]))
 702         if len(candidates):
 703             i = rand.next() % len(candidates)
 704             id = id_setter(-1, "Things")
 705             newT = new_Thing(t["T_TYPE"], (candidates[i][0], candidates[i][1]))
 706             world_db["Things"][id] = newT
 707
 708
 709 def try_healing(t):
 710     """Grow t's HP to a 1/32 chance if < HP max, satiation > 0, and waiting.
 711
 712     On success, decrease satiation score by 32.
 713     """
 714     if t["T_SATIATION"] > 0 \
 715        and t["T_LIFEPOINTS"] < \
 716            world_db["ThingTypes"][t["T_TYPE"]]["TT_LIFEPOINTS"] \
 717        and 0 == (rand.next() % 31) \
 718        and t["T_COMMAND"] == [id for id in world_db["ThingActions"]
 719                               if world_db["ThingActions"][id]["TA_NAME"] ==
 720                                  "wait"][0]:
 721         t["T_LIFEPOINTS"] += 1
 722         t["T_SATIATION"] -= 32
 723         if t == world_db["Things"][0]:
 724             strong_write(io_db["file_out"], "LOG You heal.\n")
 725         else:
 726             name = world_db["ThingTypes"][t["T_TYPE"]]["TT_NAME"]
 727             strong_write(io_db["file_out"], "LOG " + name + "heals.\n")
 728
 729
 730 def hunger(t):
 731     """Decrement t's satiation,dependent on it trigger lifepoint dec chance."""
 732     if t["T_SATIATION"] > -32768:
 733         t["T_SATIATION"] -= 1
 734     testbase = t["T_SATIATION"] if t["T_SATIATION"] >= 0 else -t["T_SATIATION"]
 735     if not world_db["ThingTypes"][t["T_TYPE"]]["TT_LIFEPOINTS"]:
 736         raise RuntimeError("A thing that should not hunger is hungering.")
 737     stomach = int(32767 / world_db["ThingTypes"][t["T_TYPE"]]["TT_LIFEPOINTS"])
 738     if int(int(testbase / stomach) / ((rand.next() % stomach) + 1)):
 739         if t == world_db["Things"][0]:
 740             strong_write(io_db["file_out"], "LOG You suffer from hunger.\n")
 741         else:
 742             name = world_db["ThingTypes"][t["T_TYPE"]]["TT_NAME"]
 743             strong_write(io_db["file_out"], "LOG " + name +
 744                                             " suffers from hunger.\n")
 745         decrement_lifepoints(t)
 746
 747
 748 def turn_over():
 749     """Run game world and its inhabitants until new player input expected."""
 750     id = 0
 751     whilebreaker = False
 752     while world_db["Things"][0]["T_LIFEPOINTS"]:
 753         for id in [id for id in world_db["Things"]]:
 754             Thing = world_db["Things"][id]
 755             if Thing["T_LIFEPOINTS"]:
 756                 if not Thing["T_COMMAND"]:
 757                     update_map_memory(Thing)
 758                     if 0 == id:
 759                         whilebreaker = True
 760                         break
 761                     # DUMMY: ai(thing)
 762                     Thing["T_COMMAND"] = 1
 763                 try_healing(Thing)
 764                 Thing["T_PROGRESS"] += 1
 765                 taid = [a for a in world_db["ThingActions"]
 766                           if a == Thing["T_COMMAND"]][0]
 767                 ThingAction = world_db["ThingActions"][taid]
 768                 if Thing["T_PROGRESS"] == ThingAction["TA_EFFORT"]:
 769                     eval("actor_" + ThingAction["TA_NAME"])(Thing)
 770                     Thing["T_COMMAND"] = 0
 771                     Thing["T_PROGRESS"] = 0
 772                 hunger(Thing)
 773             thingproliferation(Thing)
 774         if whilebreaker:
 775             break
 776         world_db["TURN"] += 1
 777
 778
 779 def new_Thing(type, pos=(0, 0)):
 780     """Return Thing of type T_TYPE, with fovmap if alive and world active."""
 781     thing = {
 782         "T_LIFEPOINTS": world_db["ThingTypes"][type]["TT_LIFEPOINTS"],
 783         "T_ARGUMENT": 0,
 784         "T_PROGRESS": 0,
 785         "T_SATIATION": 0,
 786         "T_COMMAND": 0,
 787         "T_TYPE": type,
 788         "T_POSY": pos[0],
 789         "T_POSX": pos[1],
 790         "T_CARRIES": [],
 791         "carried": False,
 792         "T_MEMTHING": [],
 793         "T_MEMMAP": False,
 794         "T_MEMDEPTHMAP": False,
 795         "fovmap": False
 796     }
 797     if world_db["WORLD_ACTIVE"] and thing["T_LIFEPOINTS"]:
 798         build_fov_map(thing)
 799     return thing
 800
 801
 802 def id_setter(id, category, id_store=False, start_at_1=False):
 803     """Set ID of object of category to manipulate ID unused? Create new one.
 804
 805     The ID is stored as id_store.id (if id_store is set). If the integer of the
 806     input is valid (if start_at_1, >= 0 and <= 255, else >= -32768 and <=
 807     32767), but <0 or (if start_at_1) <1, calculate new ID: lowest unused ID
 808     >=0 or (if start_at_1) >= 1, and <= 255. None is always returned when no
 809     new object is created, otherwise the new object's ID.
 810     """
 811     min = 0 if start_at_1 else -32768
 812     max = 255 if start_at_1 else 32767
 813     if str == type(id):
 814         id = integer_test(id, min, max)
 815     if None != id:
 816         if id in world_db[category]:
 817             if id_store:
 818                 id_store.id = id
 819             return None
 820         else:
 821             if (start_at_1 and 0 == id) \
 822                or ((not start_at_1) and (id < 0 or id > 255)):
 823                 id = -1
 824                 while 1:
 825                     id = id + 1
 826                     if id not in world_db[category]:
 827                         break
 828                 if id > 255:
 829                     print("Ignoring: "
 830                           "No unused ID available to add to ID list.")
 831                     return None
 832             if id_store:
 833                 id_store.id = id
 834     return id
 835
 836
 837 def command_ping():
 838     """Send PONG line to server output file."""
 839     strong_write(io_db["file_out"], "PONG\n")
 840
 841
 842 def command_quit():
 843     """Abort server process."""
 844     raise SystemExit("received QUIT command")
 845
 846
 847 def command_thingshere(str_y, str_x):
 848     """Write to out file list of Things known to player at coordinate y, x."""
 849     def write_thing_if_here():
 850         if y == world_db["Things"][id]["T_POSY"] \
 851            and x == world_db["Things"][id]["T_POSX"] \
 852            and not world_db["Things"][id]["carried"]:
 853             type = world_db["Things"][id]["T_TYPE"]
 854             name = world_db["ThingTypes"][type]["TT_NAME"]
 855             strong_write(io_db["file_out"], name + "\n")
 856     if world_db["WORLD_ACTIVE"]:
 857         y = integer_test(str_y, 0, 255)
 858         x = integer_test(str_x, 0, 255)
 859         length = world_db["MAP_LENGTH"]
 860         if None != y and None != x and y < length and x < length:
 861             pos = (y * world_db["MAP_LENGTH"]) + x
 862             strong_write(io_db["file_out"], "THINGS_HERE START\n")
 863             if "v" == chr(world_db["Things"][0]["fovmap"][pos]):
 864                 for id in world_db["Things"]:
 865                     write_thing_if_here()
 866             else:
 867                 for id in world_db["Things"][0]["T_MEMTHING"]:
 868                     write_thing_if_here()
 869             strong_write(io_db["file_out"], "THINGS_HERE END\n")
 870         else:
 871             print("Ignoring: Invalid map coordinates.")
 872     else:
 873         print("Ignoring: Command only works on existing worlds.")
 874
 875
 876 def play_commander(action, args=False):
 877     """Setter for player's T_COMMAND and T_ARGUMENT, then calling turn_over().
 878
 879     T_ARGUMENT is set to direction char if action=="wait",or 8-bit int if args.
 880     """
 881
 882     def set_command():
 883         id = [x for x in world_db["ThingActions"]
 884                 if world_db["ThingActions"][x]["TA_NAME"] == action][0]
 885         world_db["Things"][0]["T_COMMAND"] = id
 886         turn_over()
 887
 888     def set_command_and_argument_int(str_arg):
 889         val = integer_test(str_arg, 0, 255)
 890         if None != val:
 891             world_db["Things"][0]["T_ARGUMENT"] = val
 892             set_command()
 893
 894     def set_command_and_argument_movestring(str_arg):
 895         if str_arg in directions_db:
 896             world_db["Things"][0]["T_ARGUMENT"] = directions_db[str_arg]
 897             set_command()
 898         else:
 899             print("Ignoring: Argument must be valid direction string.")
 900
 901     if action == "move":
 902         return set_command_and_argument_movestring
 903     elif args:
 904         return set_command_and_argument_int
 905     else:
 906         return set_command
 907
 908
 909 def command_seedrandomness(seed_string):
 910     """Set rand seed to int(seed_string)."""
 911     val = integer_test(seed_string, 0, 4294967295)
 912     if None != val:
 913         rand.seed = val
 914
 915
 916 def command_seedmap(seed_string):
 917     """Set world_db["SEED_MAP"] to int(seed_string), then (re-)make map."""
 918     setter(None, "SEED_MAP", 0, 4294967295)(seed_string)
 919     remake_map()
 920
 921
 922 def command_makeworld(seed_string):
 923     """(Re-)build game world, i.e. map, things, to a new turn 1 from seed.
 924
 925     Seed rand with seed, fill it into world_db["SEED_MAP"]. Do more only with a
 926     "wait" ThingAction and world["PLAYER_TYPE"] matching ThingType of
 927     TT_START_NUMBER > 0. Then, world_db["Things"] emptied, call remake_map()
 928     and set world_db["WORLD_ACTIVE"], world_db["TURN"] to 1. Build new Things
 929     according to ThingTypes' TT_START_NUMBERS, with Thing of ID 0 to ThingType
 930     of ID = world["PLAYER_TYPE"]. Place Things randomly, and actors not on each
 931     other. Init player's memory map. Write "NEW_WORLD" line to out file.
 932     """
 933
 934     def free_pos():
 935         i = 0
 936         while 1:
 937             err = "Space to put thing on too hard to find. Map too small?"
 938             while 1:
 939                 y = rand.next() % world_db["MAP_LENGTH"]
 940                 x = rand.next() % world_db["MAP_LENGTH"]
 941                 if "." == chr(world_db["MAP"][y * world_db["MAP_LENGTH"] + x]):
 942                     break
 943                 i += 1
 944                 if i == 65535:
 945                     raise SystemExit(err)
 946             # Replica of C code, wrongly ignores animatedness of new Thing.
 947             pos_clear = (0 == len([id for id in world_db["Things"]
 948                                    if world_db["Things"][id]["T_LIFEPOINTS"]
 949                                    if world_db["Things"][id]["T_POSY"] == y
 950                                    if world_db["Things"][id]["T_POSX"] == x]))
 951             if pos_clear:
 952                 break
 953         return (y, x)
 954
 955     val = integer_test(seed_string, 0, 4294967295)
 956     if None == val:
 957         return
 958     rand.seed = val
 959     world_db["SEED_MAP"] = val
 960     player_will_be_generated = False
 961     playertype = world_db["PLAYER_TYPE"]
 962     for ThingType in world_db["ThingTypes"]:
 963         if playertype == ThingType:
 964             if 0 < world_db["ThingTypes"][ThingType]["TT_START_NUMBER"]:
 965                 player_will_be_generated = True
 966             break
 967     if not player_will_be_generated:
 968         print("Ignoring beyond SEED_MAP: " +
 969               "No player type with start number >0 defined.")
 970         return
 971     wait_action = False
 972     for ThingAction in world_db["ThingActions"]:
 973         if "wait" == world_db["ThingActions"][ThingAction]["TA_NAME"]:
 974             wait_action = True
 975     if not wait_action:
 976         print("Ignoring beyond SEED_MAP: " +
 977               "No thing action with name 'wait' defined.")
 978         return
 979     world_db["Things"] = {}
 980     remake_map()
 981     world_db["WORLD_ACTIVE"] = 1
 982     world_db["TURN"] = 1
 983     for i in range(world_db["ThingTypes"][playertype]["TT_START_NUMBER"]):
 984         id = id_setter(-1, "Things")
 985         world_db["Things"][id] = new_Thing(playertype, free_pos())
 986     update_map_memory(world_db["Things"][0])
 987     for type in world_db["ThingTypes"]:
 988         for i in range(world_db["ThingTypes"][type]["TT_START_NUMBER"]):
 989             if type != playertype:
 990                 id = id_setter(-1, "Things")
 991                 world_db["Things"][id] = new_Thing(type, free_pos())
 992     strong_write(io_db["file_out"], "NEW_WORLD\n")
 993
 994
 995 def command_maplength(maplength_string):
 996     """Redefine map length. Invalidate map, therefore lose all things on it."""
 997     val = integer_test(maplength_string, 1, 256)
 998     if None != val:
 999         world_db["MAP_LENGTH"] = val
1000         set_world_inactive()
1001         world_db["Things"] = {}
1002         libpr.set_maplength(val)
1003
1004
1005 def command_worldactive(worldactive_string):
1006     """Toggle world_db["WORLD_ACTIVE"] if possible.
1007
1008     An active world can always be set inactive. An inactive world can only be
1009     set active with a "wait" ThingAction, and a player Thing (of ID 0). On
1010     activation, rebuild all Things' FOVs, and the player's map memory.
1011     """
1012     # In original version, map existence was also tested (unnecessarily?).
1013     val = integer_test(worldactive_string, 0, 1)
1014     if val:
1015         if 0 != world_db["WORLD_ACTIVE"]:
1016             if 0 == val:
1017                 set_world_inactive()
1018             else:
1019                 print("World already active.")
1020         elif 0 == world_db["WORLD_ACTIVE"]:
1021             wait_exists = False
1022             for ThingAction in world_db["ThingActions"]:
1023                 if "wait" == world_db["ThingActions"][ThingAction]["TA_NAME"]:
1024                     wait_exists = True
1025                     break
1026             player_exists = False
1027             for Thing in world_db["Things"]:
1028                 if 0 == Thing:
1029                     player_exists = True
1030                     break
1031             if wait_exists and player_exists:
1032                 for id in world_db["Things"]:
1033                     if world_db["Things"][id]["T_LIFEPOINTS"]:
1034                         build_fov_map(world_db["Things"][id])
1035                         if 0 == id:
1036                             update_map_memory(world_db["Things"][id])
1037                 world_db["WORLD_ACTIVE"] = 1
1038
1039
1040 def test_for_id_maker(object, category):
1041     """Return decorator testing for object having "id" attribute."""
1042     def decorator(f):
1043         def helper(*args):
1044             if hasattr(object, "id"):
1045                 f(*args)
1046             else:
1047                 print("Ignoring: No " + category +
1048                       " defined to manipulate yet.")
1049         return helper
1050     return decorator
1051
1052
1053 def command_tid(id_string):
1054     """Set ID of Thing to manipulate. ID unused? Create new one.
1055
1056     Default new Thing's type to the first available ThingType, others: zero.
1057     """
1058     id = id_setter(id_string, "Things", command_tid)
1059     if None != id:
1060         if world_db["ThingTypes"] == {}:
1061             print("Ignoring: No ThingType to settle new Thing in.")
1062             return
1063         type = list(world_db["ThingTypes"].keys())[0]
1064         world_db["Things"][id] = new_Thing(type)
1065
1066
1067 test_Thing_id = test_for_id_maker(command_tid, "Thing")
1068
1069
1070 @test_Thing_id
1071 def command_tcommand(str_int):
1072     """Set T_COMMAND of selected Thing."""
1073     val = integer_test(str_int, 0, 255)
1074     if None != val:
1075         if 0 == val or val in world_db["ThingActions"]:
1076             world_db["Things"][command_tid.id]["T_COMMAND"] = val
1077         else:
1078             print("Ignoring: ThingAction ID belongs to no known ThingAction.")
1079
1080
1081 @test_Thing_id
1082 def command_ttype(str_int):
1083     """Set T_TYPE of selected Thing."""
1084     val = integer_test(str_int, 0, 255)
1085     if None != val:
1086         if val in world_db["ThingTypes"]:
1087             world_db["Things"][command_tid.id]["T_TYPE"] = val
1088         else:
1089             print("Ignoring: ThingType ID belongs to no known ThingType.")
1090
1091
1092 @test_Thing_id
1093 def command_tcarries(str_int):
1094     """Append int(str_int) to T_CARRIES of selected Thing.
1095
1096     The ID int(str_int) must not be of the selected Thing, and must belong to a
1097     Thing with unset "carried" flag. Its "carried" flag will be set on owning.
1098     """
1099     val = integer_test(str_int, 0, 255)
1100     if None != val:
1101         if val == command_tid.id:
1102             print("Ignoring: Thing cannot carry itself.")
1103         elif val in world_db["Things"] \
1104              and not world_db["Things"][val]["carried"]:
1105             world_db["Things"][command_tid.id]["T_CARRIES"].append(val)
1106             world_db["Things"][val]["carried"] = True
1107         else:
1108             print("Ignoring: Thing not available for carrying.")
1109     # Note that the whole carrying structure is different from the C version:
1110     # Carried-ness is marked by a "carried" flag, not by Things containing
1111     # Things internally.
1112
1113
1114 @test_Thing_id
1115 def command_tmemthing(str_t, str_y, str_x):
1116     """Add (int(str_t), int(str_y), int(str_x)) to selected Thing's T_MEMTHING.
1117
1118     The type must fit to an existing ThingType, and the position into the map.
1119     """
1120     type = integer_test(str_t, 0, 255)
1121     posy = integer_test(str_y, 0, 255)
1122     posx = integer_test(str_x, 0, 255)
1123     if None != type and None != posy and None != posx:
1124         if type not in world_db["ThingTypes"] \
1125            or posy >= world_db["MAP_LENGTH"] or posx >= world_db["MAP_LENGTH"]:
1126             print("Ignoring: Illegal value for thing type or position.")
1127         else:
1128             memthing = (type, posy, posx)
1129             world_db["Things"][command_tid.id]["T_MEMTHING"].append(memthing)
1130
1131
1132 def setter_map(maptype):
1133     """Set selected Thing's map of maptype's int(str_int)-th line to mapline.
1134
1135     If Thing has no map of maptype yet, initialize it with ' ' bytes first.
1136     """
1137     @test_Thing_id
1138     def helper(str_int, mapline):
1139         val = integer_test(str_int, 0, 255)
1140         if None != val:
1141             if val >= world_db["MAP_LENGTH"]:
1142                 print("Illegal value for map line number.")
1143             elif len(mapline) != world_db["MAP_LENGTH"]:
1144                 print("Map line length is unequal map width.")
1145             else:
1146                 length = world_db["MAP_LENGTH"]
1147                 map = None
1148                 if not world_db["Things"][command_tid.id][maptype]:
1149                     map = bytearray(b' ' * (length ** 2))
1150                 else:
1151                     map = world_db["Things"][command_tid.id][maptype]
1152                 map[val * length:(val * length) + length] = mapline.encode()
1153                 world_db["Things"][command_tid.id][maptype] = map
1154     return helper
1155
1156
1157 def setter_tpos(axis):
1158     """Generate setter for T_POSX or  T_POSY of selected Thing.
1159
1160     If world is active, rebuilds animate things' fovmap, player's memory map.
1161     """
1162     @test_Thing_id
1163     def helper(str_int):
1164         val = integer_test(str_int, 0, 255)
1165         if None != val:
1166             if val < world_db["MAP_LENGTH"]:
1167                 world_db["Things"][command_tid.id]["T_POS" + axis] = val
1168                 if world_db["WORLD_ACTIVE"] \
1169                    and world_db["Things"][command_tid.id]["T_LIFEPOINTS"]:
1170                     build_fov_map(world_db["Things"][command_tid.id])
1171                     if 0 == command_tid.id:
1172                         update_map_memory(world_db["Things"][command_tid.id])
1173             else:
1174                 print("Ignoring: Position is outside of map.")
1175     return helper
1176
1177
1178 def command_ttid(id_string):
1179     """Set ID of ThingType to manipulate. ID unused? Create new one.
1180
1181     Default new ThingType's TT_SYMBOL to "?", TT_CORPSE_ID to self, others: 0.
1182     """
1183     id = id_setter(id_string, "ThingTypes", command_ttid)
1184     if None != id:
1185         world_db["ThingTypes"][id] = {
1186             "TT_NAME": "(none)",
1187             "TT_CONSUMABLE": 0,
1188             "TT_LIFEPOINTS": 0,
1189             "TT_PROLIFERATE": 0,
1190             "TT_START_NUMBER": 0,
1191             "TT_SYMBOL": "?",
1192             "TT_CORPSE_ID": id
1193         }
1194
1195
1196 test_ThingType_id = test_for_id_maker(command_ttid, "ThingType")
1197
1198
1199 @test_ThingType_id
1200 def command_ttname(name):
1201     """Set TT_NAME of selected ThingType."""
1202     world_db["ThingTypes"][command_ttid.id]["TT_NAME"] = name
1203
1204
1205 @test_ThingType_id
1206 def command_ttsymbol(char):
1207     """Set TT_SYMBOL of selected ThingType. """
1208     if 1 == len(char):
1209         world_db["ThingTypes"][command_ttid.id]["TT_SYMBOL"] = char
1210     else:
1211         print("Ignoring: Argument must be single character.")
1212
1213
1214 @test_ThingType_id
1215 def command_ttcorpseid(str_int):
1216     """Set TT_CORPSE_ID of selected ThingType."""
1217     val = integer_test(str_int, 0, 255)
1218     if None != val:
1219         if val in world_db["ThingTypes"]:
1220             world_db["ThingTypes"][command_ttid.id]["TT_CORPSE_ID"] = val
1221         else:
1222             print("Ignoring: Corpse ID belongs to no known ThignType.")
1223
1224
1225 def command_taid(id_string):
1226     """Set ID of ThingAction to manipulate. ID unused? Create new one.
1227
1228     Default new ThingAction's TA_EFFORT to 1, its TA_NAME to "wait".
1229     """
1230     id = id_setter(id_string, "ThingActions", command_taid, True)
1231     if None != id:
1232         world_db["ThingActions"][id] = {
1233             "TA_EFFORT": 1,
1234             "TA_NAME": "wait"
1235         }
1236
1237
1238 test_ThingAction_id = test_for_id_maker(command_taid, "ThingAction")
1239
1240
1241 @test_ThingAction_id
1242 def command_taname(name):
1243     """Set TA_NAME of selected ThingAction.
1244
1245     The name must match a valid thing action function. If after the name
1246     setting no ThingAction with name "wait" remains, call set_world_inactive().
1247     """
1248     if name == "wait" or name == "move" or name == "use" or name == "drop" \
1249        or name == "pick_up":
1250         world_db["ThingActions"][command_taid.id]["TA_NAME"] = name
1251         if 1 == world_db["WORLD_ACTIVE"]:
1252             wait_defined = False
1253             for id in world_db["ThingActions"]:
1254                 if "wait" == world_db["ThingActions"][id]["TA_NAME"]:
1255                     wait_defined = True
1256                     break
1257             if not wait_defined:
1258                 set_world_inactive()
1259     else:
1260         print("Ignoring: Invalid action name.")
1261     # In contrast to the original,naming won't map a function to a ThingAction.
1262
1263
1264 """Commands database.
1265
1266 Map command start tokens to ([0]) number of expected command arguments, ([1])
1267 the command's meta-ness (i.e. is it to be written to the record file, is it to
1268 be ignored in replay mode if read from server input file), and ([2]) a function
1269 to be called on it.
1270 """
1271 commands_db = {
1272     "QUIT": (0, True, command_quit),
1273     "PING": (0, True, command_ping),
1274     "THINGS_HERE": (2, True, command_thingshere),
1275     "MAKE_WORLD": (1, False, command_makeworld),
1276     "SEED_MAP": (1, False, command_seedmap),
1277     "SEED_RANDOMNESS": (1, False, command_seedrandomness),
1278     "TURN": (1, False, setter(None, "TURN", 0, 65535)),
1279     "PLAYER_TYPE": (1, False, setter(None, "PLAYER_TYPE", 0, 255)),
1280     "MAP_LENGTH": (1, False, command_maplength),
1281     "WORLD_ACTIVE": (1, False, command_worldactive),
1282     "TA_ID": (1, False, command_taid),
1283     "TA_EFFORT": (1, False, setter("ThingAction", "TA_EFFORT", 0, 255)),
1284     "TA_NAME": (1, False, command_taname),
1285     "TT_ID": (1, False, command_ttid),
1286     "TT_NAME": (1, False, command_ttname),
1287     "TT_SYMBOL": (1, False, command_ttsymbol),
1288     "TT_CORPSE_ID": (1, False, command_ttcorpseid),
1289     "TT_CONSUMABLE": (1, False, setter("ThingType", "TT_CONSUMABLE",
1290                                        0, 65535)),
1291     "TT_START_NUMBER": (1, False, setter("ThingType", "TT_START_NUMBER",
1292                                          0, 255)),
1293     "TT_PROLIFERATE": (1, False, setter("ThingType", "TT_PROLIFERATE",
1294                                         0, 255)),
1295     "TT_LIFEPOINTS": (1, False, setter("ThingType", "TT_LIFEPOINTS", 0, 255)),
1296     "T_ID": (1, False, command_tid),
1297     "T_ARGUMENT": (1, False, setter("Thing", "T_ARGUMENT", 0, 255)),
1298     "T_PROGRESS": (1, False, setter("Thing", "T_PROGRESS", 0, 255)),
1299     "T_LIFEPOINTS": (1, False, setter("Thing", "T_LIFEPOINTS", 0, 255)),
1300     "T_SATIATION": (1, False, setter("Thing", "T_SATIATION", -32768, 32767)),
1301     "T_COMMAND": (1, False, command_tcommand),
1302     "T_TYPE": (1, False, command_ttype),
1303     "T_CARRIES": (1, False, command_tcarries),
1304     "T_MEMMAP": (2, False, setter_map("T_MEMMAP")),
1305     "T_MEMDEPTHMAP": (2, False, setter_map("T_MEMDEPTHMAP")),
1306     "T_MEMTHING": (3, False, command_tmemthing),
1307     "T_POSY": (1, False, setter_tpos("Y")),
1308     "T_POSX": (1, False, setter_tpos("X")),
1309     "wait": (0, False, play_commander("wait")),
1310     "move": (1, False, play_commander("move")),
1311     "pick_up": (0, False, play_commander("pick_up")),
1312     "drop": (1, False, play_commander("drop", True)),
1313     "use": (1, False, play_commander("use", True)),
1314 }
1315
1316
1317 """World state database. With sane default values. (Randomness is in rand.)"""
1318 world_db = {
1319     "TURN": 0,
1320     "SEED_MAP": 0,
1321     "PLAYER_TYPE": 0,
1322     "MAP_LENGTH": 64,
1323     "WORLD_ACTIVE": 0,
1324     "ThingActions": {},
1325     "ThingTypes": {},
1326     "Things": {}
1327 }
1328
1329 """Mapping of direction names to internal direction chars."""
1330 directions_db = {"east": "d", "south-east": "c", "south-west": "x",
1331                  "west": "s", "north-west": "w", "north-east": "e"}
1332
1333 """File IO database."""
1334 io_db = {
1335     "path_save": "save",
1336     "path_record": "record",
1337     "path_worldconf": "confserver/world",
1338     "path_server": "server/",
1339     "path_in": "server/in",
1340     "path_out": "server/out",
1341     "path_worldstate": "server/worldstate",
1342     "tmp_suffix": "_tmp",
1343     "kicked_by_rival": False,
1344     "worldstate_updateable": False
1345 }
1346
1347
1348 try:
1349     libpr = prep_library()
1350     rand = RandomnessIO()
1351     opts = parse_command_line_arguments()
1352     setup_server_io()
1353     if None != opts.replay:
1354         replay_game()
1355     else:
1356         play_game()
1357 except SystemExit as exit:
1358     print("ABORTING: " + exit.args[0])
1359 except:
1360     print("SOMETHING WENT WRONG IN UNEXPECTED WAYS")
1361     raise
1362 finally:
1363     cleanup_server_io()