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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
*/
#include "agi/agi.h"
namespace Agi {
int AgiBase::getflag(int n) {
uint8 *set = (uint8 *)&_game.flags;
set += n >> 3;
return (*set & (1 << (n & 0x07))) != 0;
}
void AgiBase::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 AgiBase::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;
if (var == vVolume) {
_mixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, val * 17);
_mixer->setVolumeForSoundType(Audio::Mixer::kMusicSoundType, val * 17);
}
}
int AgiEngine::getvar(int var) {
return _game.vars[var];
}
void AgiEngine::decrypt(uint8 *mem, int len) {
const uint8 *key;
int i;
key = (getFeatures() & GF_AGDS) ? (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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