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fow.c

/*    $Id: fow.c,v 1.8 2002/08/31 17:46:00 riq Exp $  */
/* Tenes Empanadas Graciela
 *
 * Copyright (C) 2002 Ricardo Quesada
 *
 * Author: Ricardo Calixto Quesada <riq@corest.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; only 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.
 */
/* Fog of War */

#include <stdio.h>
#include <string.h>
#include <stdarg.h>

#include "server.h"

#include "fow.h"

TEG_STATUS fow_set_mode( BOOLEAN b )
{
      if( JUEGO_EMPEZADO )
            return TEG_STATUS_ERROR;

      if( b!=0)
            b=1;
      g_game.fog_of_war = b;
      return TEG_STATUS_SUCCESS;
}

BOOLEAN fow_can_player_see_country( PSPLAYER pJ, PCOUNTRY pP )
{
      PLIST_ENTRY pL;
      PCOUNTRY pcountry;

      if( ! pJ  || ! pP )
            return FALSE;

      pL = pJ->countries.Flink;
      while( !IsListEmpty( &pJ->countries ) && (pL != &pJ->countries) ) {
            pcountry = (PCOUNTRY) pL;

            if( countries_eslimitrofe(pP->id, pcountry->id) )
                  return TRUE;

            if(  pP->id == pcountry->id )
                  return TRUE;

            pL = LIST_NEXT(pL);
      }

      return FALSE;
}

TEG_STATUS fow_fill_with_boundaries( int country, char *buffer, int buf_len )
{
      int i;
      int first_time=1;

      if( ! g_game.player_fow )
            return TEG_STATUS_ERROR;

      for( i=0; i < COUNTRIES_CANT; i++ )
      {
            if( i != country && g_countries[i].numjug != g_game.player_fow->numjug && countries_eslimitrofe( country, i ) )
            {
                  char buf[1024];

                  if( first_time ) {
                        snprintf( buf, sizeof(buf)-1,"%s=%d,%d,%d", TOKEN_COUNTRY, i, g_countries[i].numjug, g_countries[i].ejercitos );
                        first_time = 0;
                  } else
                        snprintf( buf, sizeof(buf)-1,";%s=%d,%d,%d", TOKEN_COUNTRY, i, g_countries[i].numjug, g_countries[i].ejercitos );

                  strncat( buffer, buf, buf_len );
            }
      }


      /* dont send, since I didnt modify the buffer */
      if( first_time )
            return TEG_STATUS_ERROR;

      return TEG_STATUS_SUCCESS;
}

int fow_netall_printf( int country, char *format, ...)
{
        va_list args;
      char buf[PROT_MAX_LEN];
      PLIST_ENTRY pLplayer = g_list_player.Flink;
      PLIST_ENTRY pLcountry;
      PSPLAYER pJ;
      PCOUNTRY pP;

      if( country < 0 || country >= COUNTRIES_CANT )
            return -1;

      va_start(args, format);
      vsnprintf(buf, sizeof(buf) -1, format, args);
      va_end(args);

      buf[ sizeof(buf) -1 ] = 0;

      while( !IsListEmpty( &g_list_player ) && (pLplayer != &g_list_player) ) {
            pJ = (PSPLAYER) pLplayer;
            if( pJ->fd > 0 && pJ->is_player )
            {
                  pLcountry = pJ->countries.Flink;
                  /* check if he has a boundry country wih 'country' */
                  while( !IsListEmpty( &pJ->countries ) && (pLcountry != &pJ->countries) ) {
                        pP = (PCOUNTRY) pLcountry;

                        if( countries_eslimitrofe(pP->id, country) || pP->id == country )
                        {
                              net_print(pJ->fd, buf);
                              break;
                        }

                        pLcountry = LIST_NEXT(pLcountry);
                  }

            }

            pLplayer = LIST_NEXT( pLplayer );
      }
      return 0;
}

/*
 * IMPORTANT: it is very important the user can't control the format
 * in this function to prevent a format string vulnerability
 *
 * After format is parsed, 2 "%d" should be present, because they will
 * be filled with src & dst
 */
int fow_2_netall_printf( int src, int dst, char *format, ...)
{
        va_list args;
      char buf[PROT_MAX_LEN];
      PLIST_ENTRY pLplayer = g_list_player.Flink;
      PLIST_ENTRY pLcountry;
      PSPLAYER pJ;
      PCOUNTRY pP;
      int src_country;
      int dst_country;

      if( src<0 || src>=COUNTRIES_CANT || dst<0 || dst>=COUNTRIES_CANT)
            return -1;

      va_start(args, format);
      vsnprintf(buf, sizeof(buf) -1, format, args);
      va_end(args);

      buf[ sizeof(buf) -1 ] = 0;

      while( !IsListEmpty( &g_list_player ) && (pLplayer != &g_list_player) ) {
            pJ = (PSPLAYER) pLplayer;
            if( pJ->fd > 0 && pJ->is_player )
            {
                  pLcountry = pJ->countries.Flink;
                  /* check if he has a boundry country wih src && dst */

                  src_country = -1;
                  dst_country = -1;
                  while( !IsListEmpty( &pJ->countries ) && (pLcountry != &pJ->countries) ) {
                        pP = (PCOUNTRY) pLcountry;

                        if(countries_eslimitrofe(pP->id, src) || pP->id == src)
                              src_country = src;

                        if(countries_eslimitrofe(pP->id, dst) || pP->id == dst)
                              dst_country = dst;

                        if( dst_country >= 0 && src_country >=0 )
                              break;

                        pLcountry = LIST_NEXT(pLcountry);
                  }

                  net_printf(pJ->fd, buf, src_country, dst_country);
            }

            pLplayer = LIST_NEXT( pLplayer );
      }
      return 0;
}

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