+
−(*
+
− * Hedgewars, a worms-like game
+
− * Copyright (c) 2004, 2005 Andrey Korotaev <unC0Rr@gmail.com>
+
− *
+
− * Distributed under the terms of the BSD-modified licence:
+
− *
+
− * Permission is hereby granted, free of charge, to any person obtaining a copy
+
− * of this software and associated documentation files (the "Software"), to deal
+
− * with the Software without restriction, including without limitation the
+
− * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+
− * sell copies of the Software, and to permit persons to whom the Software is
+
− * furnished to do so, subject to the following conditions:
+
− *
+
− * 1. Redistributions of source code must retain the above copyright notice,
+
− *    this list of conditions and the following disclaimer.
+
− * 2. Redistributions in binary form must reproduce the above copyright notice,
+
− *    this list of conditions and the following disclaimer in the documentation
+
− *    and/or other materials provided with the distribution.
+
− * 3. The name of the author may not be used to endorse or promote products
+
− *    derived from this software without specific prior written permission.
+
− *
+
− * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+
− * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+
− * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+
− * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+
− * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+
− * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+
− * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+
− * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+
− * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+
− * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
− *)
+
−
+
−unit uIO;
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−interface
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−uses SDLh;
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−{$INCLUDE options.inc}
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−
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−const ipcPort: Word = 0;
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−
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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 IPCWaitPongEvent;
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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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−
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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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−
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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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−
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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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−
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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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−
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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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−
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−procedure IPCWaitPongEvent;
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−begin
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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 SendIPCAndWaitReply(s: shortstring);
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−begin
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−SendIPC(s);
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−SendIPC('?');
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−IPCWaitPongEvent
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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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−         
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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.