Half implement possibility for different backends of servers list
(www for getting list is supported now)
(*
* Hedgewars, a worms-like game
* Copyright (c) 2004, 2005 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
*)
unit uIO;
interface
uses SDLh;
{$INCLUDE options.inc}
const ipcPort: Word = 0;
procedure SendIPC(s: shortstring);
procedure SendIPCXY(cmd: char; X, Y: SmallInt);
procedure SendIPCRaw(p: pointer; len: Longword);
procedure SendIPCAndWaitReply(s: shortstring);
procedure IPCWaitPongEvent;
procedure IPCCheckSock;
procedure InitIPC;
procedure CloseIPC;
procedure NetGetNextCmd;
implementation
uses uConsole, uConsts, uWorld, uMisc, uLand;
const isPonged: boolean = false;
MAXCMDS = 65535;
var IPCSock: PTCPSocket = nil;
fds: PSDLNet_SocketSet;
extcmd: array[0..MAXCMDS] of packed record
Time: LongWord;
case byte of
1: (len: byte;
cmd: Char;
X, Y: SmallInt);
2: (str: shortstring);
end;
cmdcurpos: LongInt = 0;
cmdendpos: LongInt = -1;
procedure InitIPC;
var ipaddr: TIPAddress;
begin
WriteToConsole('Init SDL_Net... ');
SDLTry(SDLNet_Init = 0, true);
fds:= SDLNet_AllocSocketSet(1);
SDLTry(fds <> nil, true);
WriteLnToConsole(msgOK);
WriteToConsole('Establishing IPC connection... ');
SDLTry(SDLNet_ResolveHost(ipaddr, '127.0.0.1', ipcPort) = 0, true);
IPCSock:= SDLNet_TCP_Open(ipaddr);
SDLTry(IPCSock <> nil, true);
WriteLnToConsole(msgOK)
end;
procedure CloseIPC;
begin
SDLNet_FreeSocketSet(fds);
SDLNet_TCP_Close(IPCSock);
SDLNet_Quit
end;
procedure ParseIPCCommand(s: shortstring);
begin
case s[1] of
'!': begin {$IFDEF DEBUGFILE}AddFileLog('Ping? Pong!');{$ENDIF}isPonged:= true; end;
'?': SendIPC('!');
'e': ParseCommand(copy(s, 2, Length(s) - 1), true);
'E': OutError(copy(s, 2, Length(s) - 1), true);
'W': OutError(copy(s, 2, Length(s) - 1), false);
'M': CheckLandDigest(s);
'T': case s[2] of
'L': GameType:= gmtLocal;
'D': GameType:= gmtDemo;
'N': GameType:= gmtNet;
'S': GameType:= gmtSave;
else OutError(errmsgIncorrectUse + ' IPC "T" :' + s[2], true) end;
else
inc(cmdendpos);
TryDo(cmdendpos <= MAXCMDS, 'Too many commands in queue', true);
extcmd[cmdendpos].Time := SDLNet_Read32(@s[byte(s[0]) - 3]);
extcmd[cmdendpos].str := s;
{$IFDEF DEBUGFILE}AddFileLog('IPC in: '+s[1]+' ticks '+inttostr(extcmd[cmdendpos].Time)+' at '+inttostr(cmdendpos));{$ENDIF}
dec(extcmd[cmdendpos].len, 4)
end
end;
procedure IPCCheckSock;
const ss: string = '';
var i: LongInt;
buf: array[0..255] of byte;
s: shortstring absolute buf;
begin
fds^.numsockets:= 0;
SDLNet_AddSocket(fds, IPCSock);
while SDLNet_CheckSockets(fds, 0) > 0 do
begin
i:= SDLNet_TCP_Recv(IPCSock, @buf[1], 255 - Length(ss));
if i > 0 then
begin
buf[0]:= i;
ss:= ss + s;
while (Length(ss) > 1)and(Length(ss) > byte(ss[1])) do
begin
ParseIPCCommand(copy(ss, 2, byte(ss[1])));
Delete(ss, 1, Succ(byte(ss[1])))
end
end else OutError('IPC connection lost', true)
end;
end;
procedure SendIPC(s: shortstring);
begin
if IPCSock <> nil then
begin
if s[0]>#251 then s[0]:= #251;
SDLNet_Write32(GameTicks, @s[Succ(byte(s[0]))]);
{$IFDEF DEBUGFILE}AddFileLog('IPC send: '+s);{$ENDIF}
inc(s[0],4);
SDLNet_TCP_Send(IPCSock, @s, Succ(byte(s[0])))
end
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 IPCWaitPongEvent;
begin
isPonged:= false;
repeat
IPCCheckSock;
SDL_Delay(1)
until isPonged
end;
procedure SendIPCAndWaitReply(s: shortstring);
begin
SendIPC(s);
SendIPC('?');
IPCWaitPongEvent
end;
procedure NetGetNextCmd;
var tmpflag: boolean;
begin
while (cmdcurpos <= cmdendpos)and(extcmd[cmdcurpos].cmd = 's') do
begin
WriteLnToConsole('> ' + copy(extcmd[cmdcurpos].str, 2, Pred(extcmd[cmdcurpos].len)));
AddCaption('> ' + copy(extcmd[cmdcurpos].str, 2, Pred(extcmd[cmdcurpos].len)), $FFFFFF, capgrpNetSay);
inc(cmdcurpos)
end;
if cmdcurpos <= cmdendpos then
TryDo(GameTicks <= extcmd[cmdcurpos].Time,
'oops, queue error. in buffer: ' + extcmd[cmdcurpos].cmd +
' (' + inttostr(GameTicks) + ' > ' +
inttostr(extcmd[cmdcurpos].Time) + ')',
true);
tmpflag:= true;
while (cmdcurpos <= cmdendpos)and(GameTicks = extcmd[cmdcurpos].Time) do
begin
case extcmd[cmdcurpos].cmd of
'L': ParseCommand('+left', true);
'l': ParseCommand('-left', true);
'R': ParseCommand('+right', true);
'r': ParseCommand('-right', true);
'U': ParseCommand('+up', true);
'u': ParseCommand('-up', true);
'D': ParseCommand('+down', true);
'd': ParseCommand('-down', true);
'A': ParseCommand('+attack', true);
'a': ParseCommand('-attack', true);
'S': ParseCommand('switch', true);
'j': ParseCommand('ljump', true);
'J': ParseCommand('hjump', true);
',': ParseCommand('skip', true);
'N': begin
tmpflag:= false;
{$IFDEF DEBUGFILE}AddFileLog('got cmd "N": time '+inttostr(extcmd[cmdcurpos].Time)){$ENDIF}
end;
'p': begin
TargetPoint.X:= SmallInt(SDLNet_Read16(@extcmd[cmdcurpos].X));
TargetPoint.Y:= SmallInt(SDLNet_Read16(@extcmd[cmdcurpos].Y));
ParseCommand('put', true)
end;
'P': begin
CursorPoint.X:= SmallInt(SDLNet_Read16(@extcmd[cmdcurpos].X) + WorldDx);
CursorPoint.Y:= SmallInt(SDLNet_Read16(@extcmd[cmdcurpos].Y) + WorldDy);
end;
'1'..'5': ParseCommand('timer ' + extcmd[cmdcurpos].cmd, true);
#128..char(128 + cMaxSlotIndex): ParseCommand('slot ' + char(byte(extcmd[cmdcurpos].cmd) - 79), true)
end;
inc(cmdcurpos)
end;
isInLag:= (cmdcurpos > cmdendpos) and tmpflag
end;
end.