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

   1 #!/usr/bin/python3
   2
   3 # This file is part of PlomRogue. PlomRogue is licensed under the GPL version 3
   4 # or any later version. For details on its copyright, license, and warranties,
   5 # see the file NOTICE in the root directory of the PlomRogue source package.
   6
   7
   8 import argparse
   9 import errno
  10 import os
  11 import shlex
  12 import shutil
  13 import time
  14 import ctypes
  15
  16
  17 class RandomnessIO:
  18     """"Interface to libplomrogue's pseudo-randomness generator."""
  19
  20     def set_seed(self, seed):
  21         libpr.seed_rrand(1, seed)
  22
  23     def get_seed(self):
  24         return libpr.seed_rrand(0, 0)
  25
  26     def next(self):
  27         return libpr.rrand()
  28
  29     seed = property(get_seed, set_seed)
  30
  31
  32 def prep_library():
  33     """Prepare ctypes library at ./libplomrogue.so"""
  34     libpath = ("./libplomrogue.so")
  35     if not os.access(libpath, os.F_OK):
  36         raise SystemExit("No library " + libpath + ", run ./redo first?")
  37     libpr = ctypes.cdll.LoadLibrary(libpath)
  38     libpr.seed_rrand.restype = ctypes.c_uint32
  39     return libpr
  40
  41
  42 def c_pointer_to_bytearray(ba):
  43     """Return C char * pointer to ba."""
  44     type = ctypes.c_char * len(ba)
  45     return type.from_buffer(ba)
  46
  47
  48 def strong_write(file, string):
  49     """Apply write(string), then flush()."""
  50     file.write(string)
  51     file.flush()
  52
  53
  54 def setup_server_io():
  55     """Fill IO files DB with proper file( path)s. Write process IO test string.
  56
  57     Ensure IO files directory at server/. Remove any old input file if found.
  58     Set up new input file for reading, and new output file for writing. Start
  59     output file with process hash line of format PID + " " + floated UNIX time
  60     (io_db["teststring"]). Raise SystemExit if file is found at path of either
  61     record or save file plus io_db["tmp_suffix"].
  62     """
  63     def detect_atomic_leftover(path, tmp_suffix):
  64         path_tmp = path + tmp_suffix
  65         msg = "Found file '" + path_tmp + "' that may be a leftover from an " \
  66               "aborted previous attempt to write '" + path + "'. Aborting " \
  67              "until matter is resolved by removing it from its current path."
  68         if os.access(path_tmp, os.F_OK):
  69             raise SystemExit(msg)
  70     io_db["teststring"] = str(os.getpid()) + " " + str(time.time())
  71     io_db["save_wait"] = 0
  72     io_db["verbose"] = False
  73     io_db["record_chunk"] = ""
  74     os.makedirs(io_db["path_server"], exist_ok=True)
  75     io_db["file_out"] = open(io_db["path_out"], "w")
  76     strong_write(io_db["file_out"], io_db["teststring"] + "\n")
  77     if os.access(io_db["path_in"], os.F_OK):
  78         os.remove(io_db["path_in"])
  79     io_db["file_in"] = open(io_db["path_in"], "w")
  80     io_db["file_in"].close()
  81     io_db["file_in"] = open(io_db["path_in"], "r")
  82     detect_atomic_leftover(io_db["path_save"], io_db["tmp_suffix"])
  83     detect_atomic_leftover(io_db["path_record"], io_db["tmp_suffix"])
  84
  85
  86 def cleanup_server_io():
  87     """Close and (if io_db["kicked_by_rival"] false) remove files in io_db."""
  88     def helper(file_key, path_key):
  89         if file_key in io_db:
  90             io_db[file_key].close()
  91         if not io_db["kicked_by_rival"] \
  92            and os.access(io_db[path_key], os.F_OK):
  93             os.remove(io_db[path_key])
  94     helper("file_in", "path_in")
  95     helper("file_out", "path_out")
  96     helper("file_worldstate", "path_worldstate")
  97     if "file_record" in io_db:
  98         io_db["file_record"].close()
  99
 100
 101 def obey(command, prefix, replay=False, do_record=False):
 102     """Call function from commands_db mapped to command's first token.
 103
 104     Tokenize command string with shlex.split(comments=True). If replay is set,
 105     a non-meta command from the commands_db merely triggers obey() on the next
 106     command from the records file. If not, non-meta commands set
 107     io_db["worldstate_updateable"] to world_db["WORLD_ACTIVE"], and, if
 108     do_record is set, are recorded to io_db["record_chunk"], and save_world()
 109     is called (and io_db["record_chunk"] written) if 15 seconds have passed
 110     since the last time it was called. The prefix string is inserted into the
 111     server's input message between its beginning 'input ' and ':'. All activity
 112     is preceded by a server_test() call.
 113     """
 114     server_test()
 115     if io_db["verbose"]:
 116         print("input " + prefix + ": " + command)
 117     try:
 118         tokens = shlex.split(command, comments=True)
 119     except ValueError as err:
 120         print("Can't tokenize command string: " + str(err) + ".")
 121         return
 122     if len(tokens) > 0 and tokens[0] in commands_db \
 123        and len(tokens) == commands_db[tokens[0]][0] + 1:
 124         if commands_db[tokens[0]][1]:
 125             commands_db[tokens[0]][2](*tokens[1:])
 126         elif replay:
 127             print("Due to replay mode, reading command as 'go on in record'.")
 128             line = io_db["file_record"].readline()
 129             if len(line) > 0:
 130                 obey(line.rstrip(), io_db["file_record"].prefix
 131                      + str(io_db["file_record"].line_n))
 132                 io_db["file_record"].line_n = io_db["file_record"].line_n + 1
 133             else:
 134                 print("Reached end of record file.")
 135         else:
 136             commands_db[tokens[0]][2](*tokens[1:])
 137             if do_record:
 138                 io_db["record_chunk"] += command + "\n"
 139                 if time.time() > io_db["save_wait"] + 15:
 140                     atomic_write(io_db["path_record"], io_db["record_chunk"],
 141                                  do_append=True)
 142                     save_world()
 143                     io_db["record_chunk"] = ""
 144                     io_db["save_wait"] = time.time()
 145             io_db["worldstate_updateable"] = world_db["WORLD_ACTIVE"]
 146     elif 0 != len(tokens):
 147         print("Invalid command/argument, or bad number of tokens.")
 148
 149
 150 def atomic_write(path, text, do_append=False, delete=True):
 151     """Atomic write of text to file at path, appended if do_append is set."""
 152     path_tmp = path + io_db["tmp_suffix"]
 153     mode = "w"
 154     if do_append:
 155         mode = "a"
 156         if os.access(path, os.F_OK):
 157             shutil.copyfile(path, path_tmp)
 158     file = open(path_tmp, mode)
 159     strong_write(file, text)
 160     file.close()
 161     if delete and os.access(path, os.F_OK):
 162         os.remove(path)
 163     os.rename(path_tmp, path)
 164
 165
 166 def save_world():
 167     """Save all commands needed to reconstruct current world state."""
 168
 169     def quote(string):
 170         string = string.replace("\u005C", '\u005C\u005C')
 171         return '"' + string.replace('"', '\u005C"') + '"'
 172
 173     def mapsetter(key):
 174         def helper(id):
 175             string = ""
 176             if world_db["Things"][id][key]:
 177                 map = world_db["Things"][id][key]
 178                 length = world_db["MAP_LENGTH"]
 179                 for i in range(length):
 180                     line = map[i * length:(i * length) + length].decode()
 181                     string = string + key + " " + str(i) + " " + quote(line) \
 182                              + "\n"
 183             return string
 184         return helper
 185
 186     def memthing(id):
 187         string = ""
 188         for memthing in world_db["Things"][id]["T_MEMTHING"]:
 189             string = string + "T_MEMTHING " + str(memthing[0]) + " " + \
 190                      str(memthing[1]) + " " + str(memthing[2]) + "\n"
 191         return string
 192
 193     def helper(category, id_string, special_keys={}):
 194         string = ""
 195         for id in sorted(world_db[category].keys()):
 196             string = string + id_string + " " + str(id) + "\n"
 197             for key in sorted(world_db[category][id].keys()):
 198                 if not key in special_keys:
 199                     x = world_db[category][id][key]
 200                     argument = quote(x) if str == type(x) else str(x)
 201                     string = string + key + " " + argument + "\n"
 202                 elif special_keys[key]:
 203                     string = string + special_keys[key](id)
 204         return string
 205
 206     string = ""
 207     for key in sorted(world_db.keys()):
 208         if dict != type(world_db[key]) and key != "MAP" and \
 209            key != "WORLD_ACTIVE" and key != "SEED_MAP":
 210             string = string + key + " " + str(world_db[key]) + "\n"
 211     string = string + "SEED_MAP " + str(world_db["SEED_MAP"]) + "\n"
 212     string = string + helper("ThingActions", "TA_ID")
 213     string = string + helper("ThingTypes", "TT_ID", {"TT_CORPSE_ID": False})
 214     for id in sorted(world_db["ThingTypes"].keys()):
 215         string = string + "TT_ID " + str(id) + "\n" + "TT_CORPSE_ID " + \
 216                  str(world_db["ThingTypes"][id]["TT_CORPSE_ID"]) + "\n"
 217     string = string + helper("Things", "T_ID",
 218                              {"T_CARRIES": False, "carried": False,
 219                               "T_MEMMAP": mapsetter("T_MEMMAP"),
 220                               "T_MEMTHING": memthing, "fovmap": False,
 221                               "T_MEMDEPTHMAP": mapsetter("T_MEMDEPTHMAP")})
 222     for id in sorted(world_db["Things"].keys()):
 223         if [] != world_db["Things"][id]["T_CARRIES"]:
 224             string = string + "T_ID " + str(id) + "\n"
 225             for carried in sorted(world_db["Things"][id]["T_CARRIES"].keys()):
 226                 string = string + "T_CARRIES " + str(carried) + "\n"
 227     string = string + "SEED_RANDOMNESS " + str(rand.seed) + "\n" + \
 228              "WORLD_ACTIVE " + str(world_db["WORLD_ACTIVE"])
 229     atomic_write(io_db["path_save"], string)
 230
 231
 232 def obey_lines_in_file(path, name, do_record=False):
 233     """Call obey() on each line of path's file, use name in input prefix."""
 234     file = open(path, "r")
 235     line_n = 1
 236     for line in file.readlines():
 237         obey(line.rstrip(), name + "file line " + str(line_n),
 238              do_record=do_record)
 239         line_n = line_n + 1
 240     file.close()
 241
 242
 243 def parse_command_line_arguments():
 244     """Return settings values read from command line arguments."""
 245     parser = argparse.ArgumentParser()
 246     parser.add_argument('-s', nargs='?', type=int, dest='replay', const=1,
 247                         action='store')
 248     parser.add_argument('-l', nargs="?", const="save", dest='savefile',
 249                         action="store")
 250     parser.add_argument('-v', dest='verbose', action='store_true')
 251     opts, unknown = parser.parse_known_args()
 252     return opts
 253
 254
 255 def server_test():
 256     """Ensure valid server out file belonging to current process.
 257
 258     This is done by comparing io_db["teststring"] to what's found at the start
 259     of the current file at io_db["path_out"]. On failure, set
 260     io_db["kicked_by_rival"] and raise SystemExit.
 261     """
 262     if not os.access(io_db["path_out"], os.F_OK):
 263         raise SystemExit("Server output file has disappeared.")
 264     file = open(io_db["path_out"], "r")
 265     test = file.readline().rstrip("\n")
 266     file.close()
 267     if test != io_db["teststring"]:
 268         io_db["kicked_by_rival"] = True
 269         msg = "Server test string in server output file does not match. This" \
 270               " indicates that the current server process has been " \
 271               "superseded by another one."
 272         raise SystemExit(msg)
 273
 274
 275 def read_command():
 276     """Return next newline-delimited command from server in file.
 277
 278     Keep building return string until a newline is encountered. Pause between
 279     unsuccessful reads, and after too much waiting, run server_test().
 280     """
 281     wait_on_fail = 0.03333
 282     max_wait = 5
 283     now = time.time()
 284     command = ""
 285     while True:
 286         add = io_db["file_in"].readline()
 287         if len(add) > 0:
 288             command = command + add
 289             if len(command) > 0 and "\n" == command[-1]:
 290                 command = command[:-1]
 291                 break
 292         else:
 293             time.sleep(wait_on_fail)
 294             if now + max_wait < time.time():
 295                 server_test()
 296                 now = time.time()
 297     return command
 298
 299
 300 def try_worldstate_update():
 301     """Write worldstate file if io_db["worldstate_updateable"] is set."""
 302     if io_db["worldstate_updateable"]:
 303
 304         def draw_visible_Things(map, run):
 305             for id in world_db["Things"]:
 306                 type = world_db["Things"][id]["T_TYPE"]
 307                 consumable = world_db["ThingTypes"][type]["TT_CONSUMABLE"]
 308                 alive = world_db["ThingTypes"][type]["TT_LIFEPOINTS"]
 309                 if (0 == run and not consumable and not alive) \
 310                    or (1 == run and consumable and not alive) \
 311                    or (2 == run and alive):
 312                     y = world_db["Things"][id]["T_POSY"]
 313                     x = world_db["Things"][id]["T_POSX"]
 314                     fovflag = world_db["Things"][0]["fovmap"][(y * length) + x]
 315                     if 'v' == chr(fovflag):
 316                         c = world_db["ThingTypes"][type]["TT_SYMBOL"]
 317                         map[(y * length) + x] = ord(c)
 318
 319         def write_map(string, map):
 320             for i in range(length):
 321                 line = map[i * length:(i * length) + length].decode()
 322                 string = string + line + "\n"
 323             return string
 324
 325         inventory = ""
 326         if [] == world_db["Things"][0]["T_CARRIES"]:
 327             inventory = "(none)\n"
 328         else:
 329             for id in world_db["Things"][0]["T_CARRIES"]:
 330                 type_id = world_db["Things"][id]["T_TYPE"]
 331                 name = world_db["ThingTypes"][type_id]["TT_NAME"]
 332                 inventory = inventory + name + "\n"
 333         string = str(world_db["TURN"]) + "\n" + \
 334                  str(world_db["Things"][0]["T_LIFEPOINTS"]) + "\n" + \
 335                  str(world_db["Things"][0]["T_SATIATION"]) + "\n" + \
 336                  inventory + "%\n" + \
 337                  str(world_db["Things"][0]["T_POSY"]) + "\n" + \
 338                  str(world_db["Things"][0]["T_POSX"]) + "\n" + \
 339                  str(world_db["MAP_LENGTH"]) + "\n"
 340         length = world_db["MAP_LENGTH"]
 341         fov = bytearray(b' ' * (length ** 2))
 342         for pos in range(length ** 2):
 343             if 'v' == chr(world_db["Things"][0]["fovmap"][pos]):
 344                 fov[pos] = world_db["MAP"][pos]
 345         for i in range(3):
 346             draw_visible_Things(fov, i)
 347         string = write_map(string, fov)
 348         mem = world_db["Things"][0]["T_MEMMAP"][:]
 349         for i in range(2):
 350             for mt in world_db["Things"][0]["T_MEMTHING"]:
 351                 consumable = world_db["ThingTypes"][mt[0]]["TT_CONSUMABLE"]
 352                 if (i == 0 and not consumable) or (i == 1 and consumable):
 353                     c = world_db["ThingTypes"][mt[0]]["TT_SYMBOL"]
 354                     mem[(mt[1] * length) + mt[2]] = ord(c)
 355         string = write_map(string, mem)
 356         atomic_write(io_db["path_worldstate"], string, delete=False)
 357         strong_write(io_db["file_out"], "WORLD_UPDATED\n")
 358         io_db["worldstate_updateable"] = False
 359
 360
 361 def replay_game():
 362     """Replay game from record file.
 363
 364     Use opts.replay as breakpoint turn to which to replay automatically before
 365     switching to manual input by non-meta commands in server input file
 366     triggering further reads of record file. Ensure opts.replay is at least 1.
 367     Run try_worldstate_update() before each interactive obey()/read_command().
 368     """
 369     if opts.replay < 1:
 370         opts.replay = 1
 371     print("Replay mode. Auto-replaying up to turn " + str(opts.replay) +
 372           " (if so late a turn is to be found).")
 373     if not os.access(io_db["path_record"], os.F_OK):
 374         raise SystemExit("No record file found to replay.")
 375     io_db["file_record"] = open(io_db["path_record"], "r")
 376     io_db["file_record"].prefix = "record file line "
 377     io_db["file_record"].line_n = 1
 378     while world_db["TURN"] < opts.replay:
 379         line = io_db["file_record"].readline()
 380         if "" == line:
 381             break
 382         obey(line.rstrip(), io_db["file_record"].prefix
 383              + str(io_db["file_record"].line_n))
 384         io_db["file_record"].line_n = io_db["file_record"].line_n + 1
 385     while True:
 386         try_worldstate_update()
 387         obey(read_command(), "in file", replay=True)
 388
 389
 390 def play_game():
 391     """Play game by server input file commands. Before, load save file found.
 392
 393     If no save file is found, a new world is generated from the commands in the
 394     world config plus a 'MAKE WORLD [current Unix timestamp]'. Record this
 395     command and all that follow via the server input file. Run
 396     try_worldstate_update() before each interactive obey()/read_command().
 397     """
 398     if os.access(io_db["path_save"], os.F_OK):
 399         obey_lines_in_file(io_db["path_save"], "save")
 400     else:
 401         if not os.access(io_db["path_worldconf"], os.F_OK):
 402             msg = "No world config file from which to start a new world."
 403             raise SystemExit(msg)
 404         obey_lines_in_file(io_db["path_worldconf"], "world config ",
 405                            do_record=True)
 406         obey("MAKE_WORLD " + str(int(time.time())), "in file", do_record=True)
 407     while True:
 408         try_worldstate_update()
 409         obey(read_command(), "in file", do_record=True)
 410
 411
 412 def remake_map():
 413     """(Re-)make island map.
 414
 415     Let "~" represent water, "." land, "X" trees: Build island shape randomly,
 416     start with one land cell in the middle, then go into cycle of repeatedly
 417     selecting a random sea cell and transforming it into land if it is neighbor
 418     to land. The cycle ends when a land cell is due to be created at the map's
 419     border. Then put some trees on the map (TODO: more precise algorithm desc).
 420     """
 421     def is_neighbor(coordinates, type):
 422         y = coordinates[0]
 423         x = coordinates[1]
 424         length = world_db["MAP_LENGTH"]
 425         ind = y % 2
 426         diag_west = x + (ind > 0)
 427         diag_east = x + (ind < (length - 1))
 428         pos = (y * length) + x
 429         if (y > 0 and diag_east
 430             and type == chr(world_db["MAP"][pos - length + ind])) \
 431            or (x < (length - 1)
 432                and type == chr(world_db["MAP"][pos + 1])) \
 433            or (y < (length - 1) and diag_east
 434                and type == chr(world_db["MAP"][pos + length + ind])) \
 435            or (y > 0 and diag_west
 436                and type == chr(world_db["MAP"][pos - length - (not ind)])) \
 437            or (x > 0
 438                and type == chr(world_db["MAP"][pos - 1])) \
 439            or (y < (length - 1) and diag_west
 440                and type == chr(world_db["MAP"][pos + length - (not ind)])):
 441             return True
 442         return False
 443     store_seed = rand.seed
 444     rand.seed = world_db["SEED_MAP"]
 445     world_db["MAP"] = bytearray(b'~' * (world_db["MAP_LENGTH"] ** 2))
 446     length = world_db["MAP_LENGTH"]
 447     add_half_width = (not (length % 2)) * int(length / 2)
 448     world_db["MAP"][int((length ** 2) / 2) + add_half_width] = ord(".")
 449     while (1):
 450         y = rand.next() % length
 451         x = rand.next() % length
 452         pos = (y * length) + x
 453         if "~" == chr(world_db["MAP"][pos]) and is_neighbor((y, x), "."):
 454             if y == 0 or y == (length - 1) or x == 0 or x == (length - 1):
 455                 break
 456             world_db["MAP"][pos] = ord(".")
 457     n_trees = int((length ** 2) / 16)
 458     i_trees = 0
 459     while (i_trees <= n_trees):
 460         single_allowed = rand.next() % 32
 461         y = rand.next() % length
 462         x = rand.next() % length
 463         pos = (y * length) + x
 464         if "." == chr(world_db["MAP"][pos]) \
 465           and ((not single_allowed) or is_neighbor((y, x), "X")):
 466             world_db["MAP"][pos] = ord("X")
 467             i_trees += 1
 468     rand.seed = store_seed
 469     # This all-too-precise replica of the original C code misses iter_limit().
 470
 471
 472 def update_map_memory(t, age_map=True):
 473     """Update t's T_MEMMAP with what's in its FOV now,age its T_MEMMEPTHMAP."""
 474     if not t["T_MEMMAP"]:
 475         t["T_MEMMAP"] = bytearray(b' ' * (world_db["MAP_LENGTH"] ** 2))
 476     if not t["T_MEMDEPTHMAP"]:
 477         t["T_MEMDEPTHMAP"] = bytearray(b' ' * (world_db["MAP_LENGTH"] ** 2))
 478     ord_v = ord("v")
 479     ord_0 = ord("0")
 480     ord_space = ord(" ")
 481     for pos in [pos for pos in range(world_db["MAP_LENGTH"] ** 2)
 482                 if ord_v == t["fovmap"][pos]]:
 483         t["T_MEMDEPTHMAP"][pos] = ord_0
 484         if ord_space == t["T_MEMMAP"][pos]:
 485             t["T_MEMMAP"][pos] = world_db["MAP"][pos]
 486     if age_map:
 487         maptype = ctypes.c_char * len(t["T_MEMDEPTHMAP"])
 488         memdepthmap = maptype.from_buffer(t["T_MEMDEPTHMAP"])
 489         fovmap = maptype.from_buffer(t["fovmap"])
 490         libpr.age_some_memdepthmap_on_nonfov_cells(memdepthmap, fovmap)
 491     for mt in [mt for mt in t["T_MEMTHING"]
 492                if "v" == chr(t["fovmap"][(mt[1] * world_db["MAP_LENGTH"])
 493                                          + mt[2]])]:
 494          t["T_MEMTHING"].remove(mt)
 495     for id in [id for id in world_db["Things"]
 496                if not world_db["Things"][id]["carried"]]:
 497         type = world_db["Things"][id]["T_TYPE"]
 498         if not world_db["ThingTypes"][type]["TT_LIFEPOINTS"]:
 499             y = world_db["Things"][id]["T_POSY"]
 500             x = world_db["Things"][id]["T_POSX"]
 501             if "v" == chr(t["fovmap"][(y * world_db["MAP_LENGTH"]) + x]):
 502                 t["T_MEMTHING"].append((type, y, x))
 503
 504
 505 def set_world_inactive():
 506     """Set world_db["WORLD_ACTIVE"] to 0 and remove worldstate file."""
 507     server_test()
 508     if os.access(io_db["path_worldstate"], os.F_OK):
 509         os.remove(io_db["path_worldstate"])
 510     world_db["WORLD_ACTIVE"] = 0
 511
 512
 513 def integer_test(val_string, min, max=None):
 514     """Return val_string if integer >= min & (if max set) <= max, else None."""
 515     try:
 516         val = int(val_string)
 517         if val < min or (max != None and val > max):
 518             raise ValueError
 519         return val
 520     except ValueError:
 521         msg = "Ignoring: Please use integer >= " + str(min)
 522         if max != None:
 523             msg += " and <= " + str(max)
 524         msg += "."
 525         print(msg)
 526         return None
 527
 528
 529 def setter(category, key, min, max=None):
 530     """Build setter for world_db([category + "s"][id])[key] to >=min/<=max."""
 531     if category is None:
 532         def f(val_string):
 533             val = integer_test(val_string, min, max)
 534             if None != val:
 535                 world_db[key] = val
 536     else:
 537         if category == "Thing":
 538             id_store = command_tid
 539             decorator = test_Thing_id
 540         elif category == "ThingType":
 541             id_store = command_ttid
 542             decorator = test_ThingType_id
 543         elif category == "ThingAction":
 544             id_store = command_taid
 545             decorator = test_ThingAction_id
 546
 547         @decorator
 548         def f(val_string):
 549             val = integer_test(val_string, min, max)
 550             if None != val:
 551                 world_db[category + "s"][id_store.id][key] = val
 552     return f
 553
 554
 555 def build_fov_map(t):
 556     """Build Thing's FOV map."""
 557     t["fovmap"] = bytearray(b'v' * (world_db["MAP_LENGTH"] ** 2))
 558     maptype = ctypes.c_char * len(world_db["MAP"])
 559     test = libpr.build_fov_map(t["T_POSY"], t["T_POSX"],
 560                                maptype.from_buffer(t["fovmap"]),
 561                                maptype.from_buffer(world_db["MAP"]))
 562     if test:
 563         raise RuntimeError("Malloc error in build_fov_Map().")
 564
 565
 566 def decrement_lifepoints(t):
 567     """Decrement t's lifepoints by 1, and if to zero, corpse it.
 568
 569     If t is the player avatar, only blank its fovmap, so that the client may
 570     still display memory data. On non-player things, erase fovmap and memory.
 571     """
 572     t["T_LIFEPOINTS"] -= 1
 573     if 0 == t["T_LIFEPOINTS"]:
 574         t["T_TYPE"] = world_db["ThingTypes"][t["T_TYPE"]]["TT_CORPSE_ID"]
 575         if world_db["Things"][0] == t:
 576             t["fovmap"] = bytearray(b' ' * (world_db["MAP_LENGTH"] ** 2))
 577             strong_write(io_db["file_out"], "LOG You die.\n")
 578         else:
 579             t["fovmap"] = False
 580             t["T_MEMMAP"] = False
 581             t["T_MEMDEPTHMAP"] = False
 582             t["T_MEMTHING"] = []
 583             strong_write(io_db["file_out"], "LOG It dies.\n")
 584
 585
 586 def mv_yx_in_dir_legal(dir, y, x):
 587     """Wrapper around libpr.mv_yx_in_dir_legal to simplify its use."""
 588     dir_c = dir.encode("ascii")[0]
 589     test = libpr.mv_yx_in_dir_legal_wrap(dir_c, y, x)
 590     if -1 == test:
 591         raise RuntimeError("Too much wrapping in mv_yx_in_dir_legal_wrap()!")
 592     return (test, libpr.result_y(), libpr.result_x())
 593
 594
 595 def actor_wait(t):
 596     """Make t do nothing (but loudly, if player avatar)."""
 597     if t == world_db["Things"][0]:
 598         strong_write(io_db["file_out"], "LOG You wait.\n")
 599
 600
 601 def actor_move(t):
 602     """If passable, move/collide(=attack) thing into T_ARGUMENT's direction."""
 603     passable = False
 604     move_result = mv_yx_in_dir_legal(chr(t["T_ARGUMENT"]),
 605                                      t["T_POSY"], t["T_POSX"])
 606     if 1 == move_result[0]:
 607         pos = (move_result[1] * world_db["MAP_LENGTH"]) + move_result[2]
 608         passable = "." == chr(world_db["MAP"][pos])
 609         hitted = [id for id in world_db["Things"]
 610                   if world_db["Things"][id] != t
 611                   if world_db["Things"][id]["T_LIFEPOINTS"]
 612                   if world_db["Things"][id]["T_POSY"] == move_result[1]
 613                   if world_db["Things"][id]["T_POSX"] == move_result[2]]
 614         if len(hitted):
 615             hit_id = hitted[0]
 616             hitter_name = world_db["ThingTypes"][t["T_TYPE"]]["TT_NAME"]
 617             hitter = "You" if t == world_db["Things"][0] else hitter_name
 618             hitted_type = world_db["Things"][hit_id]["T_TYPE"]
 619             hitted_name = world_db["ThingTypes"][hitted_type]["TT_NAME"]
 620             hitted = "you" if hit_id == 0 else hitted_name
 621             verb = " wound " if hitter == "You" else " wounds "
 622             strong_write(io_db["file_out"], "LOG " + hitter + verb + hitted +
 623                                             ".\n")
 624             decrement_lifepoints(world_db["Things"][hit_id])
 625             return
 626     dir = [dir for dir in directions_db
 627            if directions_db[dir] == chr(t["T_ARGUMENT"])][0]
 628     if passable:
 629         t["T_POSY"] = move_result[1]
 630         t["T_POSX"] = move_result[2]
 631         for id in t["T_CARRIES"]:
 632             world_db["Things"][id]["T_POSY"] = move_result[1]
 633             world_db["Things"][id]["T_POSX"] = move_result[2]
 634         build_fov_map(t)
 635         if t == world_db["Things"][0]:
 636             strong_write(io_db["file_out"], "LOG You move " + dir + ".\n")
 637     elif t == world_db["Things"][0]:
 638         strong_write(io_db["file_out"], "LOG You fail to move " + dir + ".\n")
 639
 640
 641 def actor_pick_up(t):
 642     """Make t pick up (topmost?) Thing from ground into inventory."""
 643     # Topmostness is actually not defined so far. Picks Thing with highest ID.
 644     ids = [id for id in world_db["Things"] if world_db["Things"][id] != t
 645            if not world_db["Things"][id]["carried"]
 646            if world_db["Things"][id]["T_POSY"] == t["T_POSY"]
 647            if world_db["Things"][id]["T_POSX"] == t["T_POSX"]]
 648     if len(ids):
 649         highest_id = 0
 650         for id in ids:
 651             if id > highest_id:
 652                 highest_id = id
 653         world_db["Things"][highest_id]["carried"] = True
 654         t["T_CARRIES"].append(highest_id)
 655         if t == world_db["Things"][0]:
 656             strong_write(io_db["file_out"], "LOG You pick up an object.\n")
 657     elif t == world_db["Things"][0]:
 658         err = "You try to pick up an object, but there is none."
 659         strong_write(io_db["file_out"], "LOG " + err + "\n")
 660
 661
 662 def actor_drop(t):
 663     """Make t rop Thing from inventory to ground indexed by T_ARGUMENT."""
 664     # TODO: Handle case where T_ARGUMENT matches nothing.
 665     if len(t["T_CARRIES"]):
 666         id = t["T_CARRIES"][t["T_ARGUMENT"]]
 667         t["T_CARRIES"].remove(id)
 668         world_db["Things"][id]["carried"] = False
 669         if t == world_db["Things"][0]:
 670             strong_write(io_db["file_out"], "LOG You drop an object.\n")
 671     elif t == world_db["Things"][0]:
 672         err = "You try to drop an object, but you own none."
 673         strong_write(io_db["file_out"], "LOG " + err + "\n")
 674
 675
 676 def actor_use(t):
 677     """Make t use (for now: consume) T_ARGUMENT-indexed Thing in inventory."""
 678     # TODO: Handle case where T_ARGUMENT matches nothing.
 679     if len(t["T_CARRIES"]):
 680         id = t["T_CARRIES"][t["T_ARGUMENT"]]
 681         type = world_db["Things"][id]["T_TYPE"]
 682         if world_db["ThingTypes"][type]["TT_CONSUMABLE"]:
 683             t["T_CARRIES"].remove(id)
 684             del world_db["Things"][id]
 685             t["T_SATIATION"] += world_db["ThingTypes"][type]["TT_CONSUMABLE"]
 686             if t == world_db["Things"][0]:
 687                 strong_write(io_db["file_out"],
 688                              "LOG You consume this object.\n")
 689         elif t == world_db["Things"][0]:
 690             strong_write(io_db["file_out"],
 691                          "LOG You try to use this object, but fail.\n")
 692     elif t == world_db["Things"][0]:
 693         strong_write(io_db["file_out"],
 694                      "LOG You try to use an object, but you own none.\n")
 695
 696
 697 def thingproliferation(t):
 698     """To chance of 1/TT_PROLIFERATE, create t offspring in neighbor cell.
 699
 700     Naturally only works with TT_PROLIFERATE > 0. The neighbor cell must be
 701     passable and not be inhabited by a Thing of the same type, or, if Thing is
 702     animate, any other animate Thing. If there are several map cell candidates,
 703     one is selected randomly.
 704     """
 705     def test_cell(t, y, x):
 706         if "." == chr(world_db["MAP"][(y * world_db["MAP_LENGTH"]) + x]):
 707             for id in [id for id in world_db["Things"]
 708                        if y == world_db["Things"][id]["T_POSY"]
 709                        if x == world_db["Things"][id]["T_POSX"]
 710                        if (t["T_TYPE"] == world_db["Things"][id]["T_TYPE"])
 711                        or (t["T_LIFEPOINTS"] and
 712                            world_db["Things"][id]["T_LIFEPOINTS"])]:
 713                 return False
 714             return True
 715         return False
 716     prolscore = world_db["ThingTypes"][t["T_TYPE"]]["TT_PROLIFERATE"]
 717     if prolscore and (1 == prolscore or 1 == (rand.next() % prolscore)):
 718         candidates = []
 719         for dir in [directions_db[key] for key in directions_db]:
 720             mv_result = mv_yx_in_dir_legal(dir, t["T_POSY"], t["T_POSX"])
 721             if mv_result[0] and test_cell(t, mv_result[1], mv_result[2]):
 722                 candidates.append((mv_result[1], mv_result[2]))
 723         if len(candidates):
 724             i = rand.next() % len(candidates)
 725             id = id_setter(-1, "Things")
 726             newT = new_Thing(t["T_TYPE"], (candidates[i][0], candidates[i][1]))
 727             world_db["Things"][id] = newT
 728
 729
 730 def try_healing(t):
 731     """Grow t's HP to a 1/32 chance if < HP max, satiation > 0, and waiting.
 732
 733     On success, decrease satiation score by 32.
 734     """
 735     if t["T_SATIATION"] > 0 \
 736        and t["T_LIFEPOINTS"] < \
 737            world_db["ThingTypes"][t["T_TYPE"]]["TT_LIFEPOINTS"] \
 738        and 0 == (rand.next() % 31) \
 739        and t["T_COMMAND"] == [id for id in world_db["ThingActions"]
 740                               if world_db["ThingActions"][id]["TA_NAME"] ==
 741                                  "wait"][0]:
 742         t["T_LIFEPOINTS"] += 1
 743         t["T_SATIATION"] -= 32
 744         if t == world_db["Things"][0]:
 745             strong_write(io_db["file_out"], "LOG You heal.\n")
 746         else:
 747             name = world_db["ThingTypes"][t["T_TYPE"]]["TT_NAME"]
 748             strong_write(io_db["file_out"], "LOG " + name + "heals.\n")
 749
 750
 751 def hunger(t):
 752     """Decrement t's satiation,dependent on it trigger lifepoint dec chance."""
 753     if t["T_SATIATION"] > -32768:
 754         t["T_SATIATION"] -= 1
 755     testbase = t["T_SATIATION"] if t["T_SATIATION"] >= 0 else -t["T_SATIATION"]
 756     if not world_db["ThingTypes"][t["T_TYPE"]]["TT_LIFEPOINTS"]:
 757         raise RuntimeError("A thing that should not hunger is hungering.")
 758     stomach = int(32767 / world_db["ThingTypes"][t["T_TYPE"]]["TT_LIFEPOINTS"])
 759     if int(int(testbase / stomach) / ((rand.next() % stomach) + 1)):
 760         if t == world_db["Things"][0]:
 761             strong_write(io_db["file_out"], "LOG You suffer from hunger.\n")
 762         else:
 763             name = world_db["ThingTypes"][t["T_TYPE"]]["TT_NAME"]
 764             strong_write(io_db["file_out"], "LOG " + name +
 765                                             " suffers from hunger.\n")
 766         decrement_lifepoints(t)
 767
 768
 769 def get_dir_to_target(t, filter):
 770     """Try to set T_COMMAND/T_ARGUMENT for move to "filter"-determined target.
 771
 772     The path-wise nearest target is chosen, via the shortest available path.
 773     Target must not be t. On succcess, return positive value, else False.
 774     Filters:
 775     "a": Thing in FOV is below a certain distance, animate, but of ThingType
 776          that is not t's, and starts out weaker than t is; build path as
 777          avoiding things of t's ThingType
 778     "f": neighbor cell (not inhabited by any animate Thing) further away from
 779          animate Thing not further than x steps away and in FOV and of a
 780          ThingType that is not t's, and starts out stronger or as strong as t
 781          is currently; or (cornered), if no such flight cell, but Thing of
 782          above criteria is too near,1 a cell closer to it, or, if less near,
 783          just wait
 784     "c": Thing in memorized map is consumable
 785     "s": memory map cell with greatest-reachable degree of unexploredness
 786     """
 787
 788     def zero_score_map_where_char_on_memdepthmap(c):
 789         maptype = ctypes.c_char * len(t["T_MEMDEPTHMAP"])
 790         map = maptype.from_buffer(t["T_MEMDEPTHMAP"])
 791         test = libpr.zero_score_map_where_char_on_memdepthmap(c, map)
 792         if test:
 793             raise RuntimeError("No score map allocated for "
 794                                "zero_score_map_where_char_on_memdepthmap().")
 795
 796     def set_map_score(pos, score):
 797         test = libpr.set_map_score(pos, score)
 798         if test:
 799             raise RuntimeError("No score map allocated for set_map_score().")
 800
 801     def get_map_score(pos):
 802         result = libpr.get_map_score(pos)
 803         if result < 0:
 804             raise RuntimeError("No score map allocated for get_map_score().")
 805         return result
 806
 807     def seeing_thing():
 808         if t["fovmap"] and ("a" == filter or "f" == filter):
 809             for id in world_db["Things"]:
 810                 Thing = world_db["Things"][id]
 811                 if Thing != t and Thing["T_LIFEPOINTS"] and \
 812                    t["T_TYPE"] != Thing["T_TYPE"] and \
 813                    'v' == chr(t["fovmap"][(Thing["T_POSY"]
 814                                           * world_db["MAP_LENGTH"])
 815                                           + Thing["T_POSX"]]):
 816                     ThingType = world_db["ThingTypes"][Thing["T_TYPE"]]
 817                     if ("f" == filter and ThingType["TT_LIFEPOINTS"] >=
 818                                           t["T_LIFEPOINTS"]) \
 819                        or ("a" == filter and ThingType["TT_LIFEPOINTS"] <
 820                                              t["T_LIFEPOINTS"]):
 821                         return True
 822         elif t["T_MEMMAP"] and "c" == filter:
 823             for mt in t["T_MEMTHING"]:
 824                 if ' ' != chr(t["T_MEMMAP"][(mt[1] * world_db["MAP_LENGTH"])
 825                                          + mt[2]]) \
 826                    and world_db["ThingTypes"][mt[0]]["TT_CONSUMABLE"]:
 827                     return True
 828         return False
 829
 830     def set_cells_passable_on_memmap_to_65534_on_scoremap():
 831         # OUTSOURCED TO libplomrogue.so:
 832         # memmap = t["T_MEMMAP"]
 833         # for i in [i for i in range(world_db["MAP_LENGTH"] ** 2)
 834         #            if ord_dot == memmap[i]]:
 835         #     set_map_score(i, 65534) # i.e. 65535-1
 836         map = c_pointer_to_bytearray(t["T_MEMMAP"])
 837         if libpr.set_cells_passable_on_memmap_to_65534_on_scoremap(map):
 838             raise RuntimeError("No score map allocated for "
 839                          "set_cells_passable_on_memmap_to_65534_on_scoremap().")
 840
 841     def init_score_map():
 842         test = libpr.init_score_map()
 843         if test:
 844             raise RuntimeError("Malloc error in init_score_map().")
 845         ord_dot = ord(".")
 846         ord_v = ord("v")
 847         ord_blank = ord(" ")
 848         set_cells_passable_on_memmap_to_65534_on_scoremap()
 849         if "a" == filter:
 850             for id in world_db["Things"]:
 851                 Thing = world_db["Things"][id]
 852                 pos = Thing["T_POSY"] * world_db["MAP_LENGTH"] \
 853                       + Thing["T_POSX"]
 854                 if t != Thing and Thing["T_LIFEPOINTS"] and \
 855                    t["T_TYPE"] != Thing["T_TYPE"] and \
 856                    ord_v == t["fovmap"][pos] and \
 857                    t["T_LIFEPOINTS"] > \
 858                    world_db["ThingTypes"][Thing["T_TYPE"]]["TT_LIFEPOINTS"]:
 859                     set_map_score(pos, 0)
 860                 elif t["T_TYPE"] == Thing["T_TYPE"]:
 861                     set_map_score(pos, 65535)
 862         elif "f" == filter:
 863             for id in [id for id in world_db["Things"]
 864                        if world_db["Things"][id]["T_LIFEPOINTS"]]:
 865                 Thing = world_db["Things"][id]
 866                 pos = Thing["T_POSY"] * world_db["MAP_LENGTH"] \
 867                       + Thing["T_POSX"]
 868                 if t["T_TYPE"] != Thing["T_TYPE"] and \
 869                    ord_v == t["fovmap"][pos] and \
 870                    t["T_LIFEPOINTS"] <= \
 871                    world_db["ThingTypes"][Thing["T_TYPE"]]["TT_LIFEPOINTS"]:
 872                     set_map_score(pos, 0)
 873         elif "c" == filter:
 874             for mt in [mt for mt in t["T_MEMTHING"]
 875                        if ord_blank != t["T_MEMMAP"][mt[1]
 876                                                     * world_db["MAP_LENGTH"]
 877                                                     + mt[2]]
 878                        if world_db["ThingTypes"][mt[0]]["TT_CONSUMABLE"]]:
 879                 set_map_score(mt[1] * world_db["MAP_LENGTH"] + mt[2], 0)
 880         elif "s" == filter:
 881             zero_score_map_where_char_on_memdepthmap(mem_depth_c[0])
 882
 883     def rand_target_dir(neighbors, cmp, dirs):
 884         candidates = []
 885         n_candidates = 0
 886         for i in range(len(dirs)):
 887             if cmp == neighbors[i]:
 888                 candidates.append(dirs[i])
 889                 n_candidates += 1
 890         return candidates[rand.next() % n_candidates] if n_candidates else 0
 891
 892     def get_neighbor_scores(dirs, eye_pos):
 893         scores = []
 894         if libpr.ready_neighbor_scores(eye_pos):
 895             raise RuntimeError("No score map allocated for " +
 896                                "ready_neighbor_scores.()")
 897         for i in range(len(dirs)):
 898             scores.append(libpr.get_neighbor_score(i))
 899         return scores
 900
 901     def get_dir_from_neighbors():
 902         dir_to_target = False
 903         dirs = "edcxsw"
 904         eye_pos = t["T_POSY"] * world_db["MAP_LENGTH"] + t["T_POSX"]
 905         neighbors = get_neighbor_scores(dirs, eye_pos)
 906         if "f" == filter:
 907             inhabited = [world_db["Things"][id]["T_POSY"]
 908                          * world_db["MAP_LENGTH"]
 909                          + world_db["Things"][id]["T_POSX"]
 910                          for id in world_db["Things"]
 911                          if world_db["Things"][id]["T_LIFEPOINTS"]]
 912             for i in range(len(dirs)):
 913                 mv_yx_in_dir_legal(dirs[i], t["T_POSY"], t["T_POSX"])
 914                 pos_cmp = libpr.result_y() * world_db["MAP_LENGTH"] \
 915                           + libpr.result_x()
 916                 for pos in [pos for pos in inhabited if pos == pos_cmp]:
 917                     neighbors[i] = 65535
 918                     break
 919         minmax_start = 0 if "f" == filter else 65535 - 1
 920         minmax_neighbor = minmax_start
 921         for i in range(len(dirs)):
 922             if ("f" == filter and get_map_score(eye_pos) < neighbors[i] and
 923                 minmax_neighbor < neighbors[i] and 65535 != neighbors[i]) \
 924                or ("f" != filter and minmax_neighbor > neighbors[i]):
 925                 minmax_neighbor = neighbors[i]
 926         if minmax_neighbor != minmax_start:
 927             dir_to_target = rand_target_dir(neighbors, minmax_neighbor, dirs)
 928         if "f" == filter:
 929             if not dir_to_target:
 930                 if 1 == get_map_score(eye_pos):
 931                     dir_to_target = rand_target_dir(neighbors, 0, dirs)
 932                 elif 3 >= get_map_score(eye_pos):
 933                     t["T_COMMAND"] = [id for id in world_db["ThingActions"]
 934                                       if
 935                                       world_db["ThingActions"][id]["TA_NAME"]
 936                                          == "wait"][0]
 937                     return 1
 938             elif dir_to_target and 3 < get_map_score(eye_pos):
 939                 dir_to_target = 0
 940         elif "a" == filter and 10 <= get_map_score(eye_pos):
 941             dir_to_target = 0
 942         return dir_to_target
 943
 944     dir_to_target = False
 945     mem_depth_c = b' '
 946     run_i = 9 + 1 if "s" == filter else 1
 947     while run_i and not dir_to_target and ("s" == filter or seeing_thing()):
 948         run_i -= 1
 949         init_score_map()
 950         mem_depth_c = b'9' if b' ' == mem_depth_c \
 951                            else bytes([mem_depth_c[0] - 1])
 952         if libpr.dijkstra_map():
 953             raise RuntimeError("No score map allocated for dijkstra_map().")
 954         dir_to_target = get_dir_from_neighbors()
 955         libpr.free_score_map()
 956         if dir_to_target and str == type(dir_to_target):
 957             t["T_COMMAND"] = [id for id in world_db["ThingActions"]
 958                               if world_db["ThingActions"][id]["TA_NAME"]
 959                                  == "move"][0]
 960             t["T_ARGUMENT"] = ord(dir_to_target)
 961     return dir_to_target
 962
 963
 964 def standing_on_consumable(t):
 965     """Return True/False whether t is standing on a consumable."""
 966     for id in [id for id in world_db["Things"] if world_db["Things"][id] != t
 967                if world_db["Things"][id]["T_POSY"] == t["T_POSY"]
 968                if world_db["Things"][id]["T_POSX"] == t["T_POSX"]
 969                if world_db["ThingTypes"][world_db["Things"][id]["T_TYPE"]]
 970                           ["TT_CONSUMABLE"]]:
 971         return True
 972     return False
 973
 974
 975 def get_inventory_slot_to_consume(t):
 976     """Return slot Id of strongest consumable in t's inventory, else -1."""
 977     cmp_consumability = 0
 978     selection = -1
 979     i = 0
 980     for id in t["T_CARRIES"]:
 981         type = world_db["Things"][id]["T_TYPE"]
 982         if world_db["ThingTypes"][type]["TT_CONSUMABLE"] > cmp_consumability:
 983             cmp_consumability = world_db["ThingTypes"][type]["TT_CONSUMABLE"]
 984             selection = i
 985         i += 1
 986     return selection
 987
 988
 989 def ai(t):
 990     """Determine next command/argment for actor t via AI algorithms.
 991
 992     AI will look for, and move towards, enemies (animate Things not of their
 993     own ThingType); if they see none, they will consume consumables in their
 994     inventory; if there are none, they will pick up what they stand on if they
 995     stand on consumables; if they stand on none, they will move towards the
 996     next consumable they see or remember on the map; if they see or remember
 997     none, they will explore parts of the map unseen since ever or for at least
 998     one turn; if there is nothing to explore, they will simply wait.
 999     """
1000     t["T_COMMAND"] = [id for id in world_db["ThingActions"]
1001                       if world_db["ThingActions"][id]["TA_NAME"] == "wait"][0]
1002     if not get_dir_to_target(t, "f"):
1003         sel = get_inventory_slot_to_consume(t)
1004         if -1 != sel:
1005             t["T_COMMAND"] = [id for id in world_db["ThingActions"]
1006                               if world_db["ThingActions"][id]["TA_NAME"]
1007                                  == "use"][0]
1008             t["T_ARGUMENT"] = sel
1009         elif standing_on_consumable(t):
1010             t["T_COMMAND"] = [id for id in world_db["ThingActions"]
1011                               if world_db["ThingActions"][id]["TA_NAME"]
1012                                  == "pick_up"][0]
1013         elif (not get_dir_to_target(t, "c")) and \
1014              (not get_dir_to_target(t, "a")):
1015             get_dir_to_target(t, "s")
1016
1017
1018 def turn_over():
1019     """Run game world and its inhabitants until new player input expected."""
1020     id = 0
1021     whilebreaker = False
1022     while world_db["Things"][0]["T_LIFEPOINTS"]:
1023         for id in [id for id in world_db["Things"]]:  # Only what's from start!
1024             if not id in world_db["Things"] or \
1025                world_db["Things"][id]["carried"]:   # May have been consumed or
1026                 continue                            # picked up during turn …
1027             Thing = world_db["Things"][id]
1028             if Thing["T_LIFEPOINTS"]:
1029                 if not Thing["T_COMMAND"]:
1030                     update_map_memory(Thing)
1031                     if 0 == id:
1032                         whilebreaker = True
1033                         break
1034                     ai(Thing)
1035                 try_healing(Thing)
1036                 Thing["T_PROGRESS"] += 1
1037                 taid = [a for a in world_db["ThingActions"]
1038                           if a == Thing["T_COMMAND"]][0]
1039                 ThingAction = world_db["ThingActions"][taid]
1040                 if Thing["T_PROGRESS"] == ThingAction["TA_EFFORT"]:
1041                     eval("actor_" + ThingAction["TA_NAME"])(Thing)
1042                     Thing["T_COMMAND"] = 0
1043                     Thing["T_PROGRESS"] = 0
1044                 hunger(Thing)
1045             thingproliferation(Thing)
1046         if whilebreaker:
1047             break
1048         world_db["TURN"] += 1
1049
1050
1051 def new_Thing(type, pos=(0, 0)):
1052     """Return Thing of type T_TYPE, with fovmap if alive and world active."""
1053     thing = {
1054         "T_LIFEPOINTS": world_db["ThingTypes"][type]["TT_LIFEPOINTS"],
1055         "T_ARGUMENT": 0,
1056         "T_PROGRESS": 0,
1057         "T_SATIATION": 0,
1058         "T_COMMAND": 0,
1059         "T_TYPE": type,
1060         "T_POSY": pos[0],
1061         "T_POSX": pos[1],
1062         "T_CARRIES": [],
1063         "carried": False,
1064         "T_MEMTHING": [],
1065         "T_MEMMAP": False,
1066         "T_MEMDEPTHMAP": False,
1067         "fovmap": False
1068     }
1069     if world_db["WORLD_ACTIVE"] and thing["T_LIFEPOINTS"]:
1070         build_fov_map(thing)
1071     return thing
1072
1073
1074 def id_setter(id, category, id_store=False, start_at_1=False):
1075     """Set ID of object of category to manipulate ID unused? Create new one.
1076     The ID is stored as id_store.id (if id_store is set). If the integer of the
1077     input is valid (if start_at_1, >= 0, else >= -1), but <0 or (if start_at_1)
1078     <1, calculate new ID: lowest unused ID >=0 or (if start_at_1) >= 1. None is
1079     always returned when no new object is created, else the new object's ID.
1080     """
1081     min = 0 if start_at_1 else -1
1082     if str == type(id):
1083         id = integer_test(id, min)
1084     if None != id:
1085         if id in world_db[category]:
1086             if id_store:
1087                 id_store.id = id
1088             return None
1089         else:
1090             if (start_at_1 and 0 == id) \
1091                or ((not start_at_1) and (id < 0)):
1092                 id = 0 if start_at_1 else -1
1093                 while 1:
1094                     id = id + 1
1095                     if id not in world_db[category]:
1096                         break
1097             if id_store:
1098                 id_store.id = id
1099     return id
1100
1101
1102 def command_ping():
1103     """Send PONG line to server output file."""
1104     strong_write(io_db["file_out"], "PONG\n")
1105
1106
1107 def command_quit():
1108     """Abort server process."""
1109     save_world()
1110     atomic_write(io_db["path_record"], io_db["record_chunk"], do_append=True)
1111     raise SystemExit("received QUIT command")
1112
1113
1114 def command_thingshere(str_y, str_x):
1115     """Write to out file list of Things known to player at coordinate y, x."""
1116     if world_db["WORLD_ACTIVE"]:
1117         y = integer_test(str_y, 0, 255)
1118         x = integer_test(str_x, 0, 255)
1119         length = world_db["MAP_LENGTH"]
1120         if None != y and None != x and y < length and x < length:
1121             pos = (y * world_db["MAP_LENGTH"]) + x
1122             strong_write(io_db["file_out"], "THINGS_HERE START\n")
1123             if "v" == chr(world_db["Things"][0]["fovmap"][pos]):
1124                 for id in world_db["Things"]:
1125                     if y == world_db["Things"][id]["T_POSY"] \
1126                        and x == world_db["Things"][id]["T_POSX"] \
1127                        and not world_db["Things"][id]["carried"]:
1128                         type = world_db["Things"][id]["T_TYPE"]
1129                         name = world_db["ThingTypes"][type]["TT_NAME"]
1130                         strong_write(io_db["file_out"], name + "\n")
1131             else:
1132                 for mt in world_db["Things"][0]["T_MEMTHING"]:
1133                     if y == mt[1] and x == mt[2]:
1134                         name = world_db["ThingTypes"][mt[0]]["TT_NAME"]
1135                         strong_write(io_db["file_out"], name + "\n")
1136             strong_write(io_db["file_out"], "THINGS_HERE END\n")
1137         else:
1138             print("Ignoring: Invalid map coordinates.")
1139     else:
1140         print("Ignoring: Command only works on existing worlds.")
1141
1142
1143 def play_commander(action, args=False):
1144     """Setter for player's T_COMMAND and T_ARGUMENT, then calling turn_over().
1145
1146     T_ARGUMENT is set to direction char if action=="wait",or 8-bit int if args.
1147     """
1148
1149     def set_command():
1150         id = [x for x in world_db["ThingActions"]
1151                 if world_db["ThingActions"][x]["TA_NAME"] == action][0]
1152         world_db["Things"][0]["T_COMMAND"] = id
1153         turn_over()
1154
1155     def set_command_and_argument_int(str_arg):
1156         val = integer_test(str_arg, 0, 255)
1157         if None != val:
1158             world_db["Things"][0]["T_ARGUMENT"] = val
1159             set_command()
1160
1161     def set_command_and_argument_movestring(str_arg):
1162         if str_arg in directions_db:
1163             world_db["Things"][0]["T_ARGUMENT"] = ord(directions_db[str_arg])
1164             set_command()
1165         else:
1166             print("Ignoring: Argument must be valid direction string.")
1167
1168     if action == "move":
1169         return set_command_and_argument_movestring
1170     elif args:
1171         return set_command_and_argument_int
1172     else:
1173         return set_command
1174
1175
1176 def command_seedrandomness(seed_string):
1177     """Set rand seed to int(seed_string)."""
1178     val = integer_test(seed_string, 0, 4294967295)
1179     if None != val:
1180         rand.seed = val
1181
1182
1183 def command_seedmap(seed_string):
1184     """Set world_db["SEED_MAP"] to int(seed_string), then (re-)make map."""
1185     setter(None, "SEED_MAP", 0, 4294967295)(seed_string)
1186     remake_map()
1187
1188
1189 def command_makeworld(seed_string):
1190     """(Re-)build game world, i.e. map, things, to a new turn 1 from seed.
1191
1192     Seed rand with seed, fill it into world_db["SEED_MAP"]. Do more only with a
1193     "wait" ThingAction and world["PLAYER_TYPE"] matching ThingType of
1194     TT_START_NUMBER > 0. Then, world_db["Things"] emptied, call remake_map()
1195     and set world_db["WORLD_ACTIVE"], world_db["TURN"] to 1. Build new Things
1196     according to ThingTypes' TT_START_NUMBERS, with Thing of ID 0 to ThingType
1197     of ID = world["PLAYER_TYPE"]. Place Things randomly, and actors not on each
1198     other. Init player's memory map. Write "NEW_WORLD" line to out file.
1199     """
1200
1201     def free_pos():
1202         i = 0
1203         while 1:
1204             err = "Space to put thing on too hard to find. Map too small?"
1205             while 1:
1206                 y = rand.next() % world_db["MAP_LENGTH"]
1207                 x = rand.next() % world_db["MAP_LENGTH"]
1208                 if "." == chr(world_db["MAP"][y * world_db["MAP_LENGTH"] + x]):
1209                     break
1210                 i += 1
1211                 if i == 65535:
1212                     raise SystemExit(err)
1213             # Replica of C code, wrongly ignores animatedness of new Thing.
1214             pos_clear = (0 == len([id for id in world_db["Things"]
1215                                    if world_db["Things"][id]["T_LIFEPOINTS"]
1216                                    if world_db["Things"][id]["T_POSY"] == y
1217                                    if world_db["Things"][id]["T_POSX"] == x]))
1218             if pos_clear:
1219                 break
1220         return (y, x)
1221
1222     val = integer_test(seed_string, 0, 4294967295)
1223     if None == val:
1224         return
1225     rand.seed = val
1226     world_db["SEED_MAP"] = val
1227     player_will_be_generated = False
1228     playertype = world_db["PLAYER_TYPE"]
1229     for ThingType in world_db["ThingTypes"]:
1230         if playertype == ThingType:
1231             if 0 < world_db["ThingTypes"][ThingType]["TT_START_NUMBER"]:
1232                 player_will_be_generated = True
1233             break
1234     if not player_will_be_generated:
1235         print("Ignoring beyond SEED_MAP: " +
1236               "No player type with start number >0 defined.")
1237         return
1238     wait_action = False
1239     for ThingAction in world_db["ThingActions"]:
1240         if "wait" == world_db["ThingActions"][ThingAction]["TA_NAME"]:
1241             wait_action = True
1242     if not wait_action:
1243         print("Ignoring beyond SEED_MAP: " +
1244               "No thing action with name 'wait' defined.")
1245         return
1246     world_db["Things"] = {}
1247     remake_map()
1248     world_db["WORLD_ACTIVE"] = 1
1249     world_db["TURN"] = 1
1250     for i in range(world_db["ThingTypes"][playertype]["TT_START_NUMBER"]):
1251         id = id_setter(-1, "Things")
1252         world_db["Things"][id] = new_Thing(playertype, free_pos())
1253     update_map_memory(world_db["Things"][0])
1254     for type in world_db["ThingTypes"]:
1255         for i in range(world_db["ThingTypes"][type]["TT_START_NUMBER"]):
1256             if type != playertype:
1257                 id = id_setter(-1, "Things")
1258                 world_db["Things"][id] = new_Thing(type, free_pos())
1259     strong_write(io_db["file_out"], "NEW_WORLD\n")
1260
1261
1262 def command_maplength(maplength_string):
1263     """Redefine map length. Invalidate map, therefore lose all things on it."""
1264     val = integer_test(maplength_string, 1, 256)
1265     if None != val:
1266         world_db["MAP_LENGTH"] = val
1267         set_world_inactive()
1268         world_db["Things"] = {}
1269         libpr.set_maplength(val)
1270
1271
1272 def command_worldactive(worldactive_string):
1273     """Toggle world_db["WORLD_ACTIVE"] if possible.
1274
1275     An active world can always be set inactive. An inactive world can only be
1276     set active with a "wait" ThingAction, and a player Thing (of ID 0). On
1277     activation, rebuild all Things' FOVs, and the player's map memory.
1278     """
1279     # In original version, map existence was also tested (unnecessarily?).
1280     val = integer_test(worldactive_string, 0, 1)
1281     if val:
1282         if 0 != world_db["WORLD_ACTIVE"]:
1283             if 0 == val:
1284                 set_world_inactive()
1285             else:
1286                 print("World already active.")
1287         elif 0 == world_db["WORLD_ACTIVE"]:
1288             wait_exists = False
1289             for ThingAction in world_db["ThingActions"]:
1290                 if "wait" == world_db["ThingActions"][ThingAction]["TA_NAME"]:
1291                     wait_exists = True
1292                     break
1293             player_exists = False
1294             for Thing in world_db["Things"]:
1295                 if 0 == Thing:
1296                     player_exists = True
1297                     break
1298             if wait_exists and player_exists:
1299                 for id in world_db["Things"]:
1300                     if world_db["Things"][id]["T_LIFEPOINTS"]:
1301                         build_fov_map(world_db["Things"][id])
1302                         if 0 == id:
1303                             update_map_memory(world_db["Things"][id], False)
1304                 world_db["WORLD_ACTIVE"] = 1
1305
1306
1307 def test_for_id_maker(object, category):
1308     """Return decorator testing for object having "id" attribute."""
1309     def decorator(f):
1310         def helper(*args):
1311             if hasattr(object, "id"):
1312                 f(*args)
1313             else:
1314                 print("Ignoring: No " + category +
1315                       " defined to manipulate yet.")
1316         return helper
1317     return decorator
1318
1319
1320 def command_tid(id_string):
1321     """Set ID of Thing to manipulate. ID unused? Create new one.
1322
1323     Default new Thing's type to the first available ThingType, others: zero.
1324     """
1325     id = id_setter(id_string, "Things", command_tid)
1326     if None != id:
1327         if world_db["ThingTypes"] == {}:
1328             print("Ignoring: No ThingType to settle new Thing in.")
1329             return
1330         type = list(world_db["ThingTypes"].keys())[0]
1331         world_db["Things"][id] = new_Thing(type)
1332
1333
1334 test_Thing_id = test_for_id_maker(command_tid, "Thing")
1335
1336
1337 @test_Thing_id
1338 def command_tcommand(str_int):
1339     """Set T_COMMAND of selected Thing."""
1340     val = integer_test(str_int, 0)
1341     if None != val:
1342         if 0 == val or val in world_db["ThingActions"]:
1343             world_db["Things"][command_tid.id]["T_COMMAND"] = val
1344         else:
1345             print("Ignoring: ThingAction ID belongs to no known ThingAction.")
1346
1347
1348 @test_Thing_id
1349 def command_ttype(str_int):
1350     """Set T_TYPE of selected Thing."""
1351     val = integer_test(str_int, 0)
1352     if None != val:
1353         if val in world_db["ThingTypes"]:
1354             world_db["Things"][command_tid.id]["T_TYPE"] = val
1355         else:
1356             print("Ignoring: ThingType ID belongs to no known ThingType.")
1357
1358
1359 @test_Thing_id
1360 def command_tcarries(str_int):
1361     """Append int(str_int) to T_CARRIES of selected Thing.
1362
1363     The ID int(str_int) must not be of the selected Thing, and must belong to a
1364     Thing with unset "carried" flag. Its "carried" flag will be set on owning.
1365     """
1366     val = integer_test(str_int, 0)
1367     if None != val:
1368         if val == command_tid.id:
1369             print("Ignoring: Thing cannot carry itself.")
1370         elif val in world_db["Things"] \
1371              and not world_db["Things"][val]["carried"]:
1372             world_db["Things"][command_tid.id]["T_CARRIES"].append(val)
1373             world_db["Things"][val]["carried"] = True
1374         else:
1375             print("Ignoring: Thing not available for carrying.")
1376     # Note that the whole carrying structure is different from the C version:
1377     # Carried-ness is marked by a "carried" flag, not by Things containing
1378     # Things internally.
1379
1380
1381 @test_Thing_id
1382 def command_tmemthing(str_t, str_y, str_x):
1383     """Add (int(str_t), int(str_y), int(str_x)) to selected Thing's T_MEMTHING.
1384
1385     The type must fit to an existing ThingType, and the position into the map.
1386     """
1387     type = integer_test(str_t, 0)
1388     posy = integer_test(str_y, 0, 255)
1389     posx = integer_test(str_x, 0, 255)
1390     if None != type and None != posy and None != posx:
1391         if type not in world_db["ThingTypes"] \
1392            or posy >= world_db["MAP_LENGTH"] or posx >= world_db["MAP_LENGTH"]:
1393             print("Ignoring: Illegal value for thing type or position.")
1394         else:
1395             memthing = (type, posy, posx)
1396             world_db["Things"][command_tid.id]["T_MEMTHING"].append(memthing)
1397
1398
1399 def setter_map(maptype):
1400     """Set selected Thing's map of maptype's int(str_int)-th line to mapline.
1401
1402     If Thing has no map of maptype yet, initialize it with ' ' bytes first.
1403     """
1404     @test_Thing_id
1405     def helper(str_int, mapline):
1406         val = integer_test(str_int, 0, 255)
1407         if None != val:
1408             if val >= world_db["MAP_LENGTH"]:
1409                 print("Illegal value for map line number.")
1410             elif len(mapline) != world_db["MAP_LENGTH"]:
1411                 print("Map line length is unequal map width.")
1412             else:
1413                 length = world_db["MAP_LENGTH"]
1414                 map = None
1415                 if not world_db["Things"][command_tid.id][maptype]:
1416                     map = bytearray(b' ' * (length ** 2))
1417                 else:
1418                     map = world_db["Things"][command_tid.id][maptype]
1419                 map[val * length:(val * length) + length] = mapline.encode()
1420                 world_db["Things"][command_tid.id][maptype] = map
1421     return helper
1422
1423
1424 def setter_tpos(axis):
1425     """Generate setter for T_POSX or  T_POSY of selected Thing.
1426
1427     If world is active, rebuilds animate things' fovmap, player's memory map.
1428     """
1429     @test_Thing_id
1430     def helper(str_int):
1431         val = integer_test(str_int, 0, 255)
1432         if None != val:
1433             if val < world_db["MAP_LENGTH"]:
1434                 world_db["Things"][command_tid.id]["T_POS" + axis] = val
1435                 if world_db["WORLD_ACTIVE"] \
1436                    and world_db["Things"][command_tid.id]["T_LIFEPOINTS"]:
1437                     build_fov_map(world_db["Things"][command_tid.id])
1438                     if 0 == command_tid.id:
1439                         update_map_memory(world_db["Things"][command_tid.id])
1440             else:
1441                 print("Ignoring: Position is outside of map.")
1442     return helper
1443
1444
1445 def command_ttid(id_string):
1446     """Set ID of ThingType to manipulate. ID unused? Create new one.
1447
1448     Default new ThingType's TT_SYMBOL to "?", TT_CORPSE_ID to self, others: 0.
1449     """
1450     id = id_setter(id_string, "ThingTypes", command_ttid)
1451     if None != id:
1452         world_db["ThingTypes"][id] = {
1453             "TT_NAME": "(none)",
1454             "TT_CONSUMABLE": 0,
1455             "TT_LIFEPOINTS": 0,
1456             "TT_PROLIFERATE": 0,
1457             "TT_START_NUMBER": 0,
1458             "TT_SYMBOL": "?",
1459             "TT_CORPSE_ID": id
1460         }
1461
1462
1463 test_ThingType_id = test_for_id_maker(command_ttid, "ThingType")
1464
1465
1466 @test_ThingType_id
1467 def command_ttname(name):
1468     """Set TT_NAME of selected ThingType."""
1469     world_db["ThingTypes"][command_ttid.id]["TT_NAME"] = name
1470
1471
1472 @test_ThingType_id
1473 def command_ttsymbol(char):
1474     """Set TT_SYMBOL of selected ThingType. """
1475     if 1 == len(char):
1476         world_db["ThingTypes"][command_ttid.id]["TT_SYMBOL"] = char
1477     else:
1478         print("Ignoring: Argument must be single character.")
1479
1480
1481 @test_ThingType_id
1482 def command_ttcorpseid(str_int):
1483     """Set TT_CORPSE_ID of selected ThingType."""
1484     val = integer_test(str_int, 0)
1485     if None != val:
1486         if val in world_db["ThingTypes"]:
1487             world_db["ThingTypes"][command_ttid.id]["TT_CORPSE_ID"] = val
1488         else:
1489             print("Ignoring: Corpse ID belongs to no known ThignType.")
1490
1491
1492 def command_taid(id_string):
1493     """Set ID of ThingAction to manipulate. ID unused? Create new one.
1494
1495     Default new ThingAction's TA_EFFORT to 1, its TA_NAME to "wait".
1496     """
1497     id = id_setter(id_string, "ThingActions", command_taid, True)
1498     if None != id:
1499         world_db["ThingActions"][id] = {
1500             "TA_EFFORT": 1,
1501             "TA_NAME": "wait"
1502         }
1503
1504
1505 test_ThingAction_id = test_for_id_maker(command_taid, "ThingAction")
1506
1507
1508 @test_ThingAction_id
1509 def command_taname(name):
1510     """Set TA_NAME of selected ThingAction.
1511
1512     The name must match a valid thing action function. If after the name
1513     setting no ThingAction with name "wait" remains, call set_world_inactive().
1514     """
1515     if name == "wait" or name == "move" or name == "use" or name == "drop" \
1516        or name == "pick_up":
1517         world_db["ThingActions"][command_taid.id]["TA_NAME"] = name
1518         if 1 == world_db["WORLD_ACTIVE"]:
1519             wait_defined = False
1520             for id in world_db["ThingActions"]:
1521                 if "wait" == world_db["ThingActions"][id]["TA_NAME"]:
1522                     wait_defined = True
1523                     break
1524             if not wait_defined:
1525                 set_world_inactive()
1526     else:
1527         print("Ignoring: Invalid action name.")
1528     # In contrast to the original,naming won't map a function to a ThingAction.
1529
1530
1531 def command_ai():
1532     """Call ai() on player Thing, then turn_over()."""
1533     ai(world_db["Things"][0])
1534     turn_over()
1535
1536
1537 """Commands database.
1538
1539 Map command start tokens to ([0]) number of expected command arguments, ([1])
1540 the command's meta-ness (i.e. is it to be written to the record file, is it to
1541 be ignored in replay mode if read from server input file), and ([2]) a function
1542 to be called on it.
1543 """
1544 commands_db = {
1545     "QUIT": (0, True, command_quit),
1546     "PING": (0, True, command_ping),
1547     "THINGS_HERE": (2, True, command_thingshere),
1548     "MAKE_WORLD": (1, False, command_makeworld),
1549     "SEED_MAP": (1, False, command_seedmap),
1550     "SEED_RANDOMNESS": (1, False, command_seedrandomness),
1551     "TURN": (1, False, setter(None, "TURN", 0, 65535)),
1552     "PLAYER_TYPE": (1, False, setter(None, "PLAYER_TYPE", 0)),
1553     "MAP_LENGTH": (1, False, command_maplength),
1554     "WORLD_ACTIVE": (1, False, command_worldactive),
1555     "TA_ID": (1, False, command_taid),
1556     "TA_EFFORT": (1, False, setter("ThingAction", "TA_EFFORT", 0, 255)),
1557     "TA_NAME": (1, False, command_taname),
1558     "TT_ID": (1, False, command_ttid),
1559     "TT_NAME": (1, False, command_ttname),
1560     "TT_SYMBOL": (1, False, command_ttsymbol),
1561     "TT_CORPSE_ID": (1, False, command_ttcorpseid),
1562     "TT_CONSUMABLE": (1, False, setter("ThingType", "TT_CONSUMABLE",
1563                                        0, 65535)),
1564     "TT_START_NUMBER": (1, False, setter("ThingType", "TT_START_NUMBER",
1565                                          0, 255)),
1566     "TT_PROLIFERATE": (1, False, setter("ThingType", "TT_PROLIFERATE",
1567                                         0, 255)),
1568     "TT_LIFEPOINTS": (1, False, setter("ThingType", "TT_LIFEPOINTS", 0, 255)),
1569     "T_ID": (1, False, command_tid),
1570     "T_ARGUMENT": (1, False, setter("Thing", "T_ARGUMENT", 0, 255)),
1571     "T_PROGRESS": (1, False, setter("Thing", "T_PROGRESS", 0, 255)),
1572     "T_LIFEPOINTS": (1, False, setter("Thing", "T_LIFEPOINTS", 0, 255)),
1573     "T_SATIATION": (1, False, setter("Thing", "T_SATIATION", -32768, 32767)),
1574     "T_COMMAND": (1, False, command_tcommand),
1575     "T_TYPE": (1, False, command_ttype),
1576     "T_CARRIES": (1, False, command_tcarries),
1577     "T_MEMMAP": (2, False, setter_map("T_MEMMAP")),
1578     "T_MEMDEPTHMAP": (2, False, setter_map("T_MEMDEPTHMAP")),
1579     "T_MEMTHING": (3, False, command_tmemthing),
1580     "T_POSY": (1, False, setter_tpos("Y")),
1581     "T_POSX": (1, False, setter_tpos("X")),
1582     "wait": (0, False, play_commander("wait")),
1583     "move": (1, False, play_commander("move")),
1584     "pick_up": (0, False, play_commander("pick_up")),
1585     "drop": (1, False, play_commander("drop", True)),
1586     "use": (1, False, play_commander("use", True)),
1587     "ai": (0, False, command_ai)
1588 }
1589
1590
1591 """World state database. With sane default values. (Randomness is in rand.)"""
1592 world_db = {
1593     "TURN": 0,
1594     "MAP_LENGTH": 64,
1595     "SEED_MAP": 0,
1596     "PLAYER_TYPE": 0,
1597     "WORLD_ACTIVE": 0,
1598     "ThingActions": {},
1599     "ThingTypes": {},
1600     "Things": {}
1601 }
1602
1603 """Mapping of direction names to internal direction chars."""
1604 directions_db = {"east": "d", "south-east": "c", "south-west": "x",
1605                  "west": "s", "north-west": "w", "north-east": "e"}
1606
1607 """File IO database."""
1608 io_db = {
1609     "path_save": "save",
1610     "path_record": "record_save",
1611     "path_worldconf": "confserver/world",
1612     "path_server": "server/",
1613     "path_in": "server/in",
1614     "path_out": "server/out",
1615     "path_worldstate": "server/worldstate",
1616     "tmp_suffix": "_tmp",
1617     "kicked_by_rival": False,
1618     "worldstate_updateable": False
1619 }
1620
1621
1622 try:
1623     libpr = prep_library()
1624     rand = RandomnessIO()
1625     opts = parse_command_line_arguments()
1626     if opts.savefile:
1627         io_db["path_save"] = opts.savefile
1628         io_db["path_record"] = "record_" + opts.savefile
1629     setup_server_io()
1630     if opts.verbose:
1631         io_db["verbose"] = True
1632     if None != opts.replay:
1633         replay_game()
1634     else:
1635         play_game()
1636 except SystemExit as exit:
1637     print("ABORTING: " + exit.args[0])
1638 except:
1639     print("SOMETHING WENT WRONG IN UNEXPECTED WAYS")
1640     raise
1641 finally:
1642     cleanup_server_io()