3 * Communication of the server with the outside world and its client via input,
4 * output and world state files.
12 /* Return single \0-terminated string read from input queue (world.queue); or,
13 * if queue is empty and world.turn is unequal world.last_update_turn, update
14 * world state file (and world.last_update_turn) and write a single dot line to
15 * server out file, then read server in file for the next load of bytes to put
16 * onto the input queue.
18 * Reading the server in file may put many \0-terminated strings on the queue at
19 * once. Successive calls of io_round() will make these available one by one.
20 * Each such call cuts off bytes from the beginning of world.queue, up to and
21 * including the last \0 byte that is followed by a non-\0 byte or ends the
22 * queue. If the queue starts with a \0 byte, it and its \0 followers are cut
23 * and a NULL pointer is returned. Reading from the input file stops only when
24 * one or more byte were read and the next read returns 0 bytes. If the
25 * re-filled queue does not end in a \0 byte, a \0 byte is appended to it.
27 extern char * io_round();
29 /* Write to savefile (atomically) god commands (one per line) to rebuild the
30 * current world state.
32 extern void save_world();