hedgewars/uIO.pas
author unc0rr
Wed, 20 Sep 2006 18:24:13 +0000
changeset 155 401f4ea24715
parent 154 5667e6f38704
child 159 63909aecb0ed
permissions -rw-r--r--
Engine can generate land preview and send it via IPC
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(*
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 * Hedgewars, a worms-like game
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 * Copyright (c) 2004, 2005 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * Distributed under the terms of the BSD-modified licence:
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * with the Software without restriction, including without limitation the
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 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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 * sell copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * 1. Redistributions of source code must retain the above copyright notice,
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 *    this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 *    this list of conditions and the following disclaimer in the documentation
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 *    and/or other materials provided with the distribution.
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 * 3. The name of the author may not be used to endorse or promote products
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 *    derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *)
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unit uIO;
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interface
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uses SDLh;
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{$INCLUDE options.inc}
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const ipcPort: Word = 0;
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procedure SendIPC(s: shortstring);
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procedure SendIPCXY(cmd: char; X, Y: SmallInt);
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procedure SendIPCRaw(p: pointer; len: Longword);
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procedure SendIPCAndWaitReply(s: shortstring);
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procedure IPCCheckSock;
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procedure InitIPC;
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procedure CloseIPC;
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procedure NetGetNextCmd;
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implementation
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uses uConsole, uConsts, uWorld, uMisc, uRandom, uLand;
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const isPonged: boolean = false;
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var  IPCSock: PTCPSocket = nil;
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     fds: PSDLNet_SocketSet;
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     extcmd: array[word] of packed record
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                                   Time: LongWord;
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                                   case byte of
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                                        1: (len: byte;
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                                            cmd: Char;
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                                            X, Y: SmallInt);
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                                        2: (str: shortstring);
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                                   end;
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     cmdcurpos: integer = 0;
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     cmdendpos: integer = -1;
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procedure InitIPC;
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var ipaddr: TIPAddress;
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begin
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WriteToConsole('Init SDL_Net... ');
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SDLTry(SDLNet_Init = 0, true);
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fds:= SDLNet_AllocSocketSet(1);
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SDLTry(fds <> nil, true);
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WriteLnToConsole(msgOK);
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WriteToConsole('Establishing IPC connection... ');
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SDLTry(SDLNet_ResolveHost(ipaddr, '127.0.0.1', ipcPort) = 0, true);
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IPCSock:= SDLNet_TCP_Open(ipaddr);
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SDLTry(IPCSock <> nil, true);
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WriteLnToConsole(msgOK)
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end;
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procedure CloseIPC;
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begin
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SDLNet_FreeSocketSet(fds);
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SDLNet_TCP_Close(IPCSock);
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SDLNet_Quit
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end;
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procedure ParseIPCCommand(s: shortstring);
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begin
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case s[1] of
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     '!': begin {$IFDEF DEBUGFILE}AddFileLog('Ping? Pong!');{$ENDIF}isPonged:= true; end;
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     '?': SendIPC('!');
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     'e': ParseCommand(copy(s, 2, Length(s) - 1));
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     'E': OutError(copy(s, 2, Length(s) - 1), true);
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     'W': OutError(copy(s, 2, Length(s) - 1), false);
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     'T': case s[2] of
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               'L': GameType:= gmtLocal;
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               'D': GameType:= gmtDemo;
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               'N': GameType:= gmtNet;
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               'S': GameType:= gmtSave;
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               else OutError(errmsgIncorrectUse + ' IPC "T" :' + s[2], true) end;
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     else
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     inc(cmdendpos);
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     extcmd[cmdendpos].Time := SDLNet_Read32(@s[byte(s[0]) - 3]);
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     extcmd[cmdendpos].str  := s;
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     {$IFDEF DEBUGFILE}AddFileLog('IPC in: '+s[1]+' ticks '+inttostr(extcmd[cmdendpos].Time)+' at '+inttostr(cmdendpos));{$ENDIF}
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     dec(extcmd[cmdendpos].len, 4)
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     end
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end;
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procedure IPCCheckSock;
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const ss: string = '';
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var i: integer;
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    buf: array[0..255] of byte;
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    s: shortstring absolute buf;
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begin
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fds.numsockets:= 0;
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SDLNet_AddSocket(fds, IPCSock);
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while SDLNet_CheckSockets(fds, 0) > 0 do
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      begin
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      i:= SDLNet_TCP_Recv(IPCSock, @buf[1], 255);
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      if i > 0 then
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         begin
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         buf[0]:= i;
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         ss:= ss + s;
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         while (Length(ss) > 1)and(Length(ss) > byte(ss[1])) do
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               begin
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               ParseIPCCommand(copy(ss, 2, byte(ss[1])));
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               Delete(ss, 1, Succ(byte(ss[1])))
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               end
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         end else OutError('IPC connection lost', true)
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      end;
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end;
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procedure SendIPC(s: shortstring);
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begin
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if IPCSock <> nil then
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   begin
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   if s[0]>#251 then s[0]:= #251;
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   SDLNet_Write32(GameTicks, @s[Succ(byte(s[0]))]);
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   {$IFDEF DEBUGFILE}AddFileLog('IPC send: '+s);{$ENDIF}
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   inc(s[0],4);
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   SDLNet_TCP_Send(IPCSock, @s, Succ(byte(s[0])))
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   end
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end;
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procedure SendIPCRaw(p: pointer; len: Longword);
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begin
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SDLNet_TCP_Send(IPCSock, p, len)
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end;
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procedure SendIPCXY(cmd: char; X, Y: SmallInt);
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var s: shortstring;
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begin
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s[0]:= #5;
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s[1]:= cmd;
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SDLNet_Write16(X, @s[2]);
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SDLNet_Write16(Y, @s[4]);
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SendIPC(s)
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end;
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procedure SendIPCAndWaitReply(s: shortstring);
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begin
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SendIPC(s);
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SendIPC('?');
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isPonged:= false;
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repeat
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   IPCCheckSock;
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   SDL_Delay(1)
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until isPonged
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end;
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procedure NetGetNextCmd;
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var tmpflag: boolean;
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begin
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while (cmdcurpos <= cmdendpos)and(extcmd[cmdcurpos].cmd = 's') do
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      begin
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      WriteLnToConsole('> ' + copy(extcmd[cmdcurpos].str, 2, Pred(extcmd[cmdcurpos].len)));
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      AddCaption('> ' + copy(extcmd[cmdcurpos].str, 2, Pred(extcmd[cmdcurpos].len)), $FFFFFF, capgrpNetSay);
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      inc(cmdcurpos)
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      end;
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if cmdcurpos <= cmdendpos then
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   TryDo(GameTicks <= extcmd[cmdcurpos].Time,
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         'oops, queue error. in buffer: ' + extcmd[cmdcurpos].cmd +
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         ' (' + inttostr(GameTicks) + ' > ' +
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         inttostr(extcmd[cmdcurpos].Time) + ')',
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         true);
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tmpflag:= true;
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while (cmdcurpos <= cmdendpos)and(GameTicks = extcmd[cmdcurpos].Time) do
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   begin
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   case extcmd[cmdcurpos].cmd of
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        'L': ParseCommand('+left');
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        'l': ParseCommand('-left');
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        'R': ParseCommand('+right');
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        'r': ParseCommand('-right');
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        'U': ParseCommand('+up');
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        'u': ParseCommand('-up');
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        'D': ParseCommand('+down');
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        'd': ParseCommand('-down');
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        'A': ParseCommand('+attack');
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        'a': ParseCommand('-attack');
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        'S': ParseCommand('switch');
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        'j': ParseCommand('ljump');
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        'J': ParseCommand('hjump');
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        ',': ParseCommand('skip');
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        'N': begin
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             tmpflag:= false;
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             {$IFDEF DEBUGFILE}AddFileLog('got cmd "N": time '+inttostr(extcmd[cmdcurpos].Time)){$ENDIF}
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             end;
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        'p': begin
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             TargetPoint.X:= SDLNet_Read16(@extcmd[cmdcurpos].X);
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             TargetPoint.Y:= SDLNet_Read16(@extcmd[cmdcurpos].Y);
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             ParseCommand('put')
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             end;
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        'P': begin
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             CursorPoint.X:= SDLNet_Read16(@extcmd[cmdcurpos].X) + WorldDx;
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             CursorPoint.Y:= SDLNet_Read16(@extcmd[cmdcurpos].Y) + WorldDy;
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             end;
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        '1'..'5': ParseCommand('timer ' + extcmd[cmdcurpos].cmd);
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        #128..char(128 + cMaxSlotIndex): ParseCommand('slot ' + char(byte(extcmd[cmdcurpos].cmd) - 79))
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        end;
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   inc(cmdcurpos)
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   end;
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isInLag:= (cmdcurpos > cmdendpos) and tmpflag
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end;
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end.