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75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2006 The ScummVM project
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*
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* Copyright (C) 1999-2003 Sarien Team
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/stdafx.h"
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#include "agi/agi.h"
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namespace Agi {
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int AgiEngine::getflag(int n) {
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uint8 *set = (uint8 *)&_game.flags;
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set += n >> 3;
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return (*set & (1 << (n & 0x07))) != 0;
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}
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void AgiEngine::setflag(int n, int v) {
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uint8 *set = (uint8 *)&_game.flags;
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set += n >> 3;
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if (v)
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*set |= 1 << (n & 0x07); /* set bit */
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else
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*set &= ~(1 << (n & 0x07)); /* clear bit */
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}
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void AgiEngine::flipflag(int n) {
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uint8 *set = (uint8 *)&_game.flags;
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set += n >> 3;
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*set ^= 1 << (n & 0x07); /* flip bit */
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}
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void AgiEngine::setvar(int var, int val) {
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_game.vars[var] = val;
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}
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int AgiEngine::getvar(int var) {
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return _game.vars[var];
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}
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void AgiEngine::decrypt(uint8 *mem, int len) {
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const uint8 *key;
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int i;
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key = _opt.agdsMode ? (const uint8 *)CRYPT_KEY_AGDS
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: (const uint8 *)CRYPT_KEY_SIERRA;
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for (i = 0; i < len; i++)
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*(mem + i) ^= *(key + (i % 11));
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}
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} // End of namespace Agi
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