(*
* 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;
interface
uses SDLh;
{$INCLUDE options.inc}
const ipcPort: Word = 0;
procedure SendIPC(s: shortstring);
procedure SendIPCAndWaitReply(s: shortstring);
procedure IPCCheckSock;
procedure InitIPC;
procedure CloseIPC;
procedure NetGetNextCmd;
procedure LoadFortPoints(Fort: shortstring; isRight: boolean; Count: Longword);
implementation
uses uConsole, uConsts, uWorld, uMisc, uRandom, uLand;
const isPonged: boolean = false;
var IPCSock: PTCPSocket = nil;
fds: PSDLNet_SocketSet;
extcmd: array[word] of packed record
Time: LongWord;
case byte of
1: (len: byte;
cmd: Char;
X, Y: integer;);
2: (str: shortstring);
end;
cmdcurpos: integer = 0;
cmdendpos: integer = -1;
procedure InitIPC;
var ipaddr: TIPAddress;
begin
WriteToConsole('Init SDL_Net... ');
SDLTry(SDLNet_Init = 0, true);
fds:= SDLNet_AllocSocketSet(1);
SDLTry(fds <> nil, true);
WriteLnToConsole(msgOK);
WriteToConsole('Establishing IPC connection... ');
SDLTry(SDLNet_ResolveHost(ipaddr, '127.0.0.1', ipcPort) = 0, true);
IPCSock:= SDLNet_TCP_Open(ipaddr);
SDLTry(IPCSock <> nil, true);
WriteLnToConsole(msgOK)
end;
procedure CloseIPC;
begin
SDLNet_FreeSocketSet(fds);
SDLNet_TCP_Close(IPCSock);
SDLNet_Quit
end;
procedure ParseIPCCommand(s: shortstring);
begin
case s[1] of
'!': begin {$IFDEF DEBUGFILE}AddFileLog('Ping? Pong!');{$ENDIF}isPonged:= true; end;
'?': SendIPC('!');
'e': ParseCommand(copy(s, 2, Length(s) - 1));
'E': OutError(copy(s, 2, Length(s) - 1), true);
'W': OutError(copy(s, 2, Length(s) - 1), false);
'T': case s[2] of
'L': GameType:= gmtLocal;
'D': GameType:= gmtDemo;
'N': GameType:= gmtNet;
else OutError(errmsgIncorrectUse + ' IPC "T" :' + s[2], true) end;
else
inc(cmdendpos);
extcmd[cmdendpos].Time := PLongWord(@s[byte(s[0]) - 3])^;
extcmd[cmdendpos].str := s;
{$IFDEF DEBUGFILE}AddFileLog('IPC in: '+s[1]+' ticks '+inttostr(extcmd[cmdendpos].Time)+' at '+inttostr(cmdendpos));{$ENDIF}
dec(extcmd[cmdendpos].len, 4)
end
end;
procedure IPCCheckSock;
const ss: string = '';
var i: integer;
buf: array[0..255] of byte;
s: shortstring absolute buf;
begin
fds.numsockets:= 0;
SDLNet_AddSocket(fds, IPCSock);
while SDLNet_CheckSockets(fds, 0) > 0 do
begin
i:= SDLNet_TCP_Recv(IPCSock, @buf[1], 255);
if i > 0 then
begin
buf[0]:= i;
ss:= ss + s;
while (Length(ss) > 1)and(Length(ss) > byte(ss[1])) do
begin
ParseIPCCommand(copy(ss, 2, byte(ss[1])));
Delete(ss, 1, Succ(byte(ss[1])))
end
end else OutError('IPC connection lost', true)
end;
end;
procedure SendIPC(s: shortstring);
begin
if IPCSock <> nil then
begin
if s[0]>#251 then s[0]:= #251;
PLongWord(@s[Succ(byte(s[0]))])^:= GameTicks;
{$IFDEF DEBUGFILE}AddFileLog('IPC send: '+s);{$ENDIF}
inc(s[0],4);
SDLNet_TCP_Send(IPCSock, @s, Succ(byte(s[0])))
end
end;
procedure SendIPCAndWaitReply(s: shortstring);
begin
SendIPC(s);
SendIPC('?');
isPonged:= false;
repeat
IPCCheckSock;
SDL_Delay(1)
until isPonged
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)), $FFFFFF, capgrpNetSay);
inc(cmdcurpos)
end;
if cmdcurpos <= cmdendpos then
if GameTicks > extcmd[cmdcurpos].Time then
outerror('oops, queue error. in buffer: '+extcmd[cmdcurpos].cmd+' ('+inttostr(GameTicks)+' > '+inttostr(extcmd[cmdcurpos].Time)+')', true);
tmpflag:= true;
while (cmdcurpos <= cmdendpos)and(GameTicks = extcmd[cmdcurpos].Time) do
begin
case extcmd[cmdcurpos].cmd of
'L': ParseCommand('+left');
'l': ParseCommand('-left');
'R': ParseCommand('+right');
'r': ParseCommand('-right');
'U': ParseCommand('+up');
'u': ParseCommand('-up');
'D': ParseCommand('+down');
'd': ParseCommand('-down');
'A': ParseCommand('+attack');
'a': ParseCommand('-attack');
'S': ParseCommand('switch');
'j': ParseCommand('ljump');
'J': ParseCommand('hjump');
',': ParseCommand('skip');
'N': begin
tmpflag:= false;
{$IFDEF DEBUGFILE}AddFileLog('got cmd "N": time '+inttostr(extcmd[cmdcurpos].Time)){$ENDIF}
end;
'p': begin
TargetPoint.X:= extcmd[cmdcurpos].X;
TargetPoint.Y:= extcmd[cmdcurpos].Y;
ParseCommand('put')
end;
'P': begin
CursorPoint.X:= extcmd[cmdcurpos].X + WorldDx;
CursorPoint.Y:= extcmd[cmdcurpos].Y + WorldDy;
end;
'1'..'5': ParseCommand('timer ' + extcmd[cmdcurpos].cmd);
#128..#134: ParseCommand('slot ' + char(byte(extcmd[cmdcurpos].cmd) - 79))
end;
inc(cmdcurpos)
end;
isInLag:= (cmdcurpos > cmdendpos) and tmpflag
end;
procedure LoadFortPoints(Fort: shortstring; isRight: boolean; Count: Longword);
const cMAXFORTPOINTS = 20;
var f: textfile;
i, t: integer;
cnt: Longword;
ar: array[0..Pred(cMAXFORTPOINTS)] of TPoint;
p: TPoint;
begin
if isRight then Fort:= Pathz[ptForts] + '/' + Fort + 'R.txt'
else Fort:= Pathz[ptForts] + '/' + Fort + 'L.txt';
WriteToConsole(msgLoading + Fort + ' ');
{$I-}
AssignFile(f, Fort);
Reset(f);
cnt:= 0;
while not (eof(f) or (cnt = cMAXFORTPOINTS)) do
begin
Readln(f, ar[cnt].x, ar[cnt].y);
if isRight then inc(ar[cnt].x, 1024);
inc(cnt);
end;
Closefile(f);
{$I+}
TryDo(IOResult = 0, msgFailed, true);
WriteLnToConsole(msgOK);
TryDo(Count < cnt, 'Fort doesn''t contain needed amount of spawn points', true);
for i:= 0 to Pred(cnt) do
begin
t:= GetRandom(cnt);
if i <> t then
begin
p:= ar[i];
ar[i]:= ar[t];
ar[t]:= p
end
end;
for i:= 0 to Pred(Count) do
AddHHPoint(ar[i].x, ar[i].y);
end;
end.