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// license:BSD-3-Clause
// copyright-holders:Andreas Naive,David Haywood
#ifndef _IGS036CRYPT_H_
#define _IGS036CRYPT_H_
#include "emu.h"
class igs036_decryptor
{
public:
igs036_decryptor(const uint16_t* game_key);
void decrypter_rom(memory_region* region);
uint16_t decrypt(uint16_t cipherword, int word_address)const;
uint16_t deobfuscate(uint16_t cipherword, int word_address)const;
private:
const uint16_t* key;
static int (*rot_enabling[16][4])(int);
static int (*rot_direction[4][8])(int);
static const uint16_t triggers[16][2];
int rotation(int address)const;
uint16_t rol(uint16_t num, int shift)const;
int rot_enabled(int address, const int* group)const ;
int rot_group(int address, const int* group)const;
};
extern const uint16_t orleg2_key[0x100];
extern const uint16_t m312cn_key[0x100];
extern const uint16_t cjddzsp_key[0x100];
extern const uint16_t cjdh2_key[0x100];
extern const uint16_t kov3_key[0x100];
extern const uint16_t kov2_key[0x100];
extern const uint16_t ddpdoj_key[0x100];
#endif
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