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cmd_exec.cpp
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cmd_exec.cpp
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/*
CMD_EXEC.C v0.14
Core command execution, higher level cmd functions and ext cmd syntax.
Copyright (c) 2004 Francesco Orsenigo <francesco.orsenigo@gmail.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.
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; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "main.h"
#include "game.h"
#include "cmd.h"
#include "net.h"
/*=============================================================================
* LAST TRANSMIT
* Holds the game time of the last call to cmdRoute()
*/
static unsigned long int last_transmit;
/*=============================================================================
* BRAIN SELECTION
* These variables select the targets of all game commands.
* Only cmd() and cmdReadBrain() will change this value.
*/
static unsigned cmdSelectedBrain;
brainC* cmdGetBrain() { return game->Brains + cmdSelectedBrain; }
int cmdGetBrainId() { return cmdSelectedBrain; }
int cmdSelectBrain(int b) { cmdSelectedBrain = b; }
/*=============================================================================
* BRAIN ID TO CHAR
* CHAR TO BRAIN ID
*/
int cmdBrainIdToChar(int id)
{
if(id == 0xff) return '*';
if(id < 10) return '0' + id;
return 'A' + (id-10);
}
int cmdCharToBrainId(char c)
{
if(c >= '0' && c <= '9') return c - '0';
if(c >= 'A' && c - 'A' + 10 < GAME_MAX_BRAINS) return c - 'A' + 10;
return 0xff;
}
/*=============================================================================
* SEND TO SERVER
* Sends a cmd to server.
*/
int cmd_execSendToServer(char *bf)
{
if(netConnected()) net_fastSend(net_connections, bf);
}
/*=============================================================================
* ROUTE
* Prepares a command string for routing (ie adds brainID) and
* sends it to all clients.
*/
static int cmdRoute(char *s)
{
char bf[CMD_MAX_LENGHT+10];
sprintf(bf, "%c: %s", cmdBrainIdToChar(cmdGetBrainId()), s);
net_fastSendAll(bf);
}
/*=============================================================================
* READ BRAIN
* Selects brain specifyed in command string s.
*/
static char *cmdReadBrain(char *s, char *fe)
{
// read brain id, and check it //
cmdSelectBrain(cmdCharToBrainId(*s));
//@@debug if(cmdGetBrainId() == 0xff) goto ERROR;
s++;
// ": " expected //
if(strncmp(": ", s, 2)) goto ERROR;
s += 2;
return s;
ERROR:
pe("%sno valid BrainId in packet.\n", fe);
return 0;
}
/*=============================================================================
* EXEC REMOTE
* Executes a remote command, ie a command from the network.
*/
static int cmdExecRemote(cmdC* c)
{
char fe[] = "cmdExecRemote: ";
if(!c->Game)
{
pe("%s`%s` is not a game command.\n", fe, arg0.s);
return -1;
}
// assuming CURRENT BRAIN is already correctly set //
c->Game(); // execute command locally //
return 0;
}
/*=============================================================================
* FROM SERVER
* Used by client to process incoming commands from server.
*/
int cmdFromServer(char *s)
{
char fe[] = "cmdFromServer: ";
cmdC* c;
s = cmdReadBrain(s, fe); if(!s) return -1;
c = cmdInterprete(s, fe); if(!c) return -1;
if(cmdExecRemote(c)) return -1; // exec as remote command //
return 0;
}
/*=============================================================================
* FROM CLIENT
* cmd version used by server to process incoming commands from client.
*/
int cmdFromClient(char *s)
{
char fe[] = "cmdFromClient: ";
cmdC* c;
c = cmdInterprete(s, fe); if(!c) return -1;
if(c->Check && c->Check())
{
pe("%serror, cmd ignored.\n", fe);
return -1;
}
if(cmdExecRemote(c)) return -1; // exec as remote command //
// route the command to all clients //
cmdRoute(s);
return 0;
}
//EOF =========================================================================