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/* cheats3.cpp
*
* Copyright (C) 2010 dking <dking024@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licens e 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 <stdio.h>
#include <ctype.h>
#include <string.h>
#include "snes9x.h"
#include "cheats.h"
#include "memmap.h"
#include "gcheat.h"
extern SCheatData Cheat;
int S9xAddCheat_ex (unsigned int address, unsigned char* cheat_dat, unsigned int cheat_dat_len,
unsigned int cheat_cell_num, unsigned int part_id, unsigned int str_num)
{
if(cheat_cell_num < MAX_CHEATS_T)
{
Cheat.c[cheat_cell_num].address = address;
Cheat.c[cheat_cell_num].enabled = FALSE;
if(cheat_dat_len > 1)
memcpy(Cheat.c[cheat_cell_num].name, cheat_dat, cheat_dat_len);
else
Cheat.c[cheat_cell_num].byte = cheat_dat[0];
Cheat.c[cheat_cell_num].total_part = 0; //default are sub-part
Cheat.c[cheat_cell_num].part_id = part_id;
Cheat.c[cheat_cell_num].part_len = cheat_dat_len;
Cheat.c[cheat_cell_num].cheat_type = 0; //default are sub-part
Cheat.c[cheat_cell_num].name_id = str_num;
return 0;
}
return -1;
}
void S9xAddCheat_ov(unsigned int cheat_cell_num, unsigned int total_part)
{
if(cheat_cell_num < MAX_CHEATS_T)
{
Cheat.c[cheat_cell_num].total_part = total_part; //default are sub-part
Cheat.c[cheat_cell_num].cheat_type = 0x80;
}
}
static unsigned int S9xGetSub_id(unsigned int start, unsigned int sub_part)
{
unsigned int i, m, n;
if(0 == sub_part)
return start;
if((start+1) >= g_cheat_cell_num)
return start;
m = 0;
for(i= start; i < g_cheat_cell_num; )
{
n = Cheat.c[i].total_part;
i += n;
m += 1;
if(m == sub_part) break;
}
return i;
}
unsigned int S9xGetCheat_nameid(unsigned int start, unsigned int part)
{
#if 0
unsigned int m, n, i;
unsigned int ret;
unsigned int cell_num;
cell_num = g_cheat_cell_num;
ret = Cheat.c[start].name_id;
if((start+1) >= cell_num)
return ret;
m = 0;
for(i = start; i < cell_num; ) {
if(m == part) break;
n = Cheat.c[i].total_part;
i += n;
m += 1;
}
if(i < cell_num)
ret = Cheat.c[i].name_id;
return ret;
#else
unsigned int i;
i = S9xGetSub_id(start, part);
return Cheat.c[i].name_id;
#endif
}
void S9xCheat_switch(unsigned int start, unsigned int sub_part, unsigned int enable)
{
unsigned int i, m, n;
if((start+1) >= g_cheat_cell_num)
return;
i = S9xGetSub_id(start, sub_part);
m = Cheat.c[i].total_part;
for(n = 0; n < m; n++)
Cheat.c[i+n].enabled = enable;
}
static inline void S9xApplyCheat_ex(unsigned int start, unsigned int num)
{
unsigned int i, m;
unsigned int address, len;
for(i = 0; i < num; i++)
{
address = Cheat.c[start+i].address;
len = Cheat.c[start+i].part_len;
int block = (address >> MEMMAP_SHIFT) & MEMMAP_MASK;
unsigned char *ptr = Memory.Map [block];
if(1 == len)
{
if (ptr >= (uint8 *) CMemory::MAP_LAST)
*(ptr + (address & 0xffff)) = Cheat.c[start+i].byte;
else
S9xSetByte (Cheat.c[start+i].byte, address);
}
else
{
for(m= 0; m < len; m++)
{
if (ptr >= (uint8 *) CMemory::MAP_LAST)
*(ptr + (address & 0xffff)) = Cheat.c[start+i].name[m];
else
S9xSetByte (Cheat.c[start+i].name[m], address);
}
}
}
}
void S9xApplyCheats_ex(void)
{
unsigned int i, m, n;
if (Settings.ApplyCheats)
{
for(i= 0; i < g_cheat_cell_num; i++)
{
m = Cheat.c[i].total_part;
if(Cheat.c[i].enabled)
S9xApplyCheat_ex(i, m);
i += m;
}
}
}
#if 1
extern "C" void dump_mem(unsigned char* addr, unsigned int len);
void S9x_dumpcheat(unsigned int id)
{
cprintf("\nid %d------------\n", id);
cprintf("total %d; part %d\n", Cheat.c[id].total_part, Cheat.c[id].part_id);
cprintf("address: %08x; data: %d\n", Cheat.c[id].address, Cheat.c[id].part_len);
if(Cheat.c[id].part_len == 1)
cprintf("data: %02x\n", Cheat.c[id].byte);
else
dump_mem((unsigned char*)Cheat.c[id].name, Cheat.c[id].part_len);
cprintf(" ------\n");
}
#endif
void S9xCheat_Disable(void)
{
Settings.ApplyCheats = FALSE;
}
void S9xCheat_Enable(void)
{
Settings.ApplyCheats = TRUE;
}
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