(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004, 2005, 2007, 2008 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 *)

{$INCLUDE "options.inc"}

unit uIO;

interface

uses SDLh;

var ipcPort: Word;

    hiTicks: Word;

procedure init_uIO;

procedure free_uIO;

procedure SendIPC(s: shortstring);

procedure SendIPCXY(cmd: char; X, Y: SmallInt);

procedure SendIPCRaw(p: pointer; len: Longword);

procedure SendIPCAndWaitReply(s: shortstring);

procedure SendIPCTimeInc;

procedure SendKeepAliveMessage(Lag: Longword);

procedure LoadRecordFromFile(fileName: shortstring);

procedure IPCWaitPongEvent;

procedure IPCCheckSock;

procedure InitIPC;

procedure CloseIPC;

procedure NetGetNextCmd;

implementation

uses uConsole, uConsts, uWorld, uMisc, uLand, uChat, uTeams;

type PCmd = ^TCmd;

     TCmd = packed record

            Next: PCmd;

            loTime: Word;

            case byte of

            1: (len: byte;

                cmd: Char;

                X, Y: SmallInt);

            2: (str: shortstring);

            end;

function AddCmd(Time: Word; str: shortstring): PCmd;

var command: PCmd;

begin

new(command);

FillChar(command^, sizeof(TCmd), 0);

command^.loTime:= Time;

command^.str:= str;

if command^.cmd <> 'F' then dec(command^.len, 2); // cut timestamp

if headcmd = nil then

   begin

   headcmd:= command;

   lastcmd:= command

   end else

   begin

   lastcmd^.Next:= command;

   lastcmd:= command

   end;

AddCmd:= command;

end;

procedure RemoveCmd;

var tmp: PCmd;

begin

TryDo(headcmd <> nil, 'Engine bug: headcmd = nil', true);

tmp:= headcmd;

headcmd:= headcmd^.Next;

if headcmd = nil then lastcmd:= nil;

dispose(tmp)

end;

procedure InitIPC;

var ipaddr: TIPAddress;

begin

WriteToConsole('Init SDL_Net... ');

SDLTry(SDLNet_Init = 0, true);

fds:= SDLNet_AllocSocketSet(1);

SDLTry(fds <> nil, true);

WriteLnToConsole(msgOK);

WriteToConsole('Establishing IPC connection... ');

SDLTry(SDLNet_ResolveHost(ipaddr, '127.0.0.1', ipcPort) = 0, true);

IPCSock:= SDLNet_TCP_Open(ipaddr);

SDLTry(IPCSock <> nil, true);

WriteLnToConsole(msgOK)

end;

procedure CloseIPC;

begin

end;

procedure ParseIPCCommand(s: shortstring);

var loTicks: Word;

begin

case s[1] of

     '!': begin {$IFDEF DEBUGFILE}AddFileLog('Ping? Pong!');{$ENDIF}isPonged:= true; end;

     '?': SendIPC('!');

     'e': ParseCommand(copy(s, 2, Length(s) - 1), true);

     'E': OutError(copy(s, 2, Length(s) - 1), true);

     'W': OutError(copy(s, 2, Length(s) - 1), false);

     'M': CheckLandDigest(s);

     'T': case s[2] of

               'L': GameType:= gmtLocal;

               'D': GameType:= gmtDemo;

               'N': GameType:= gmtNet;

               'S': GameType:= gmtSave;

               else OutError(errmsgIncorrectUse + ' IPC "T" :' + s[2], true) end;

     else

     loTicks:= SDLNet_Read16(@s[byte(s[0]) - 1]);

     AddCmd(loTicks, s);

     {$IFDEF DEBUGFILE}AddFileLog('IPC in: '+s[1]+' ticks '+inttostr(lastcmd^.loTime));{$ENDIF}

     end

end;

procedure IPCCheckSock;

const ss: shortstring = '';

var i: LongInt;

begin

if IPCSock = nil then

   exit;

fds^.numsockets:= 0;

SDLNet_AddSocket(fds, IPCSock);

while SDLNet_CheckSockets(fds, 0) > 0 do

end;

procedure LoadRecordFromFile(fileName: shortstring);

var f: file;

begin

// set RDNLY on file open

filemode:= 0;

assign(f, fileName);

reset(f, 1);

repeat

until i = 0;

close(f)

end;

procedure SendIPC(s: shortstring);

begin

if IPCSock <> nil then

end;

procedure SendIPCRaw(p: pointer; len: Longword);

begin

if IPCSock <> nil then

   begin

   SDLNet_TCP_Send(IPCSock, p, len)

   end

end;

procedure SendIPCXY(cmd: char; X, Y: SmallInt);

var s: shortstring;

begin

s[0]:= #5;

s[1]:= cmd;

SDLNet_Write16(X, @s[2]);

SDLNet_Write16(Y, @s[4]);

SendIPC(s)

end;

procedure SendIPCTimeInc;

const timeinc: shortstring = '#';

begin

SendIPCRaw(@timeinc, 2)

end;

procedure IPCWaitPongEvent;

begin

isPonged:= false;

repeat

   IPCCheckSock;

   SDL_Delay(1)

until isPonged

end;

procedure SendIPCAndWaitReply(s: shortstring);

begin

SendIPC(s);

SendIPC('?');

IPCWaitPongEvent

end;

procedure SendKeepAliveMessage(Lag: Longword);

begin

inc(SendEmptyPacketTicks, Lag);

if (SendEmptyPacketTicks >= cSendEmptyPacketTime) then

end;

procedure NetGetNextCmd;

var tmpflag: boolean;

begin

tmpflag:= true;

while (headcmd <> nil)

if (headcmd <> nil) and tmpflag and (not CurrentTeam^.hasGone) then

isInLag:= (headcmd = nil) and tmpflag and (not CurrentTeam^.hasGone);

if isInLag then fastUntilLag:= false

end;

procedure init_uIO;

begin

end;

procedure free_uIO;

begin

end;

end.