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/* ScummVM - Scumm Interpreter
* Copyright (C) 2006 The ScummVM project
*
* Copyright (C) 1999-2003 Sarien Team
*
* 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; either version 2
* of the License, or (at your option) any later version.
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "common/stdafx.h"
#include "agi/agi.h"
namespace Agi {
int AgiEngine::getflag(int n) {
uint8 *set = (uint8 *)&_game.flags;
set += n >> 3;
return (*set & (1 << (n & 0x07))) != 0;
}
void AgiEngine::setflag(int n, int v) {
uint8 *set = (uint8 *)&_game.flags;
set += n >> 3;
if (v)
*set |= 1 << (n & 0x07); /* set bit */
else
*set &= ~(1 << (n & 0x07)); /* clear bit */
}
void AgiEngine::flipflag(int n) {
uint8 *set = (uint8 *)&_game.flags;
set += n >> 3;
*set ^= 1 << (n & 0x07); /* flip bit */
}
void AgiEngine::setvar(int var, int val) {
_game.vars[var] = val;
}
int AgiEngine::getvar(int var) {
return _game.vars[var];
}
void AgiEngine::decrypt(uint8 *mem, int len) {
const uint8 *key;
int i;
key = _opt.agdsMode ? (const uint8 *)CRYPT_KEY_AGDS
: (const uint8 *)CRYPT_KEY_SIERRA;
for (i = 0; i < len; i++)
*(mem + i) ^= *(key + (i % 11));
}
} // End of namespace Agi
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