/*
* Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
*
* (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
* Jerremy Koot (jkoot@snes9x.com)
*
* Super FX C emulator code
* (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and
* Gary Henderson.
* Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
*
* DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
* C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
* C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com).
*
* DOS port code contains the works of other authors. See headers in
* individual files.
*
* Snes9x homepage: http://www.snes9x.com
*
* Permission to use, copy, modify and distribute Snes9x in both binary and
* source form, for non-commercial purposes, is hereby granted without fee,
* providing that this license information and copyright notice appear with
* all copies and any derived work.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event shall the authors be held liable for any damages
* arising from the use of this software.
*
* Snes9x is freeware for PERSONAL USE only. Commercial users should
* seek permission of the copyright holders first. Commercial use includes
* charging money for Snes9x or software derived from Snes9x.
*
* The copyright holders request that bug fixes and improvements to the code
* should be forwarded to them so everyone can benefit from the modifications
* in future versions.
*
* Super NES and Super Nintendo Entertainment System are trademarks of
* Nintendo Co., Limited and its subsidiary companies.
*/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "snes9x.h"
#include "cheats.h"
#include "memmap.h"
static bool8 S9xAllHex (const char *code, int len)
{
for (int i = 0; i < len; i++)
if ((code [i] < '0' || code [i] > '9') &&
(code [i] < 'a' || code [i] > 'f') &&
(code [i] < 'A' || code [i] > 'F'))
return (FALSE);
return (TRUE);
}
const char *S9xProActionReplayToRaw (const char *code, uint32 &address, uint8 &byte)
{
uint32 data = 0;
if (strlen (code) != 8 || !S9xAllHex (code, 8) ||
sscanf (code, "%x", &data) != 1)
return ("Invalid Pro Action Replay code - should be 8 hex digits in length.");
address = data >> 8;
byte = (uint8) data;
return (NULL);
}
const char *S9xGoldFingerToRaw (const char *code, uint32 &address, bool8 &sram,
uint8 &num_bytes, uint8 bytes[3])
{
char tmp [15];
if (strlen (code) != 14)
return ("Invalid Gold Finger code should be 14 hex digits in length.");
strncpy (tmp, code, 5);
tmp [5] = 0;
if (sscanf (tmp, "%x", &address) != 1)
return ("Invalid Gold Finger code.");
int i;
for (i = 0; i < 3; i++)
{
strncpy (tmp, code + 5 + i * 2, 2);
tmp [2] = 0;
int byte;
if (sscanf (tmp, "%x", &byte) != 1)
break;
bytes [i] = (uint8) byte;
}
num_bytes = i;
sram = code [13] == '1';
return (NULL);
}
const char *S9xGameGenieToRaw (const char *code, uint32 &address, uint8 &byte)
{
char new_code [12];
if (strlen (code) != 9 || *(code + 4) != '-' || !S9xAllHex (code, 4) ||
!S9xAllHex (code + 5, 4))
return ("Invalid Game Genie(tm) code - should be 'xxxx-xxxx'.");
strcpy (new_code, "0x");
strncpy (new_code + 2, code, 4);
strcpy (new_code + 6, code + 5);
static char *real_hex = "0123456789ABCDEF";
static char *genie_hex = "DF4709156BC8A23E";
for (int i = 2; i < 10; i++)
{
if (islower (new_code [i]))
new_code [i] = toupper (new_code [i]);
int j;
for (j = 0; j < 16; j++)
{
if (new_code [i] == genie_hex [j])
{
new_code [i] = real_hex [j];
break;
}
}
if (j == 16)
return ("Invalid hex-character in Game Genie(tm) code");
}
uint32 data = 0;
sscanf (new_code, "%x", &data);
byte = (uint8)(data >> 24);
address = data & 0xffffff;
address = ((address & 0x003c00) << 10) +
((address & 0x00003c) << 14) +
((address & 0xf00000) >> 8) +
((address & 0x000003) << 10) +
((address & 0x00c000) >> 6) +
((address & 0x0f0000) >> 12) +
((address & 0x0003c0) >> 6);
return (NULL);
}
void S9xStartCheatSearch (SCheatData *d)
{
memmove (d->CWRAM, d->RAM, 0x20000);
memmove (d->CSRAM, d->SRAM, 0x10000);
memmove (d->CIRAM, &d->FillRAM [0x3000], 0x2000);
memset ((char *) d->WRAM_BITS, 0xff, 0x20000 >> 3);
memset ((char *) d->SRAM_BITS, 0xff, 0x10000 >> 3);
memset ((char *) d->IRAM_BITS, 0xff, 0x2000 >> 3);
}
#define BIT_CLEAR(a,v) \
(a)[(v) >> 5] &= ~(1 << ((v) & 31))
#define BIT_SET(a,v) \
(a)[(v) >> 5] |= 1 << ((v) & 31)
#define TEST_BIT(a,v) \
((a)[(v) >> 5] & (1 << ((v) & 31)))
#define _C(c,a,b) \
((c) == S9X_LESS_THAN ? (a) < (b) : \
(c) == S9X_GREATER_THAN ? (a) > (b) : \
(c) == S9X_LESS_THAN_OR_EQUAL ? (a) <= (b) : \
(c) == S9X_GREATER_THAN_OR_EQUAL ? (a) >= (b) : \
(c) == S9X_EQUAL ? (a) == (b) : \
(a) != (b))
#define _D(s,m,o) \
((s) == S9X_8_BITS ? (uint8) (*((m) + (o))) : \
(s) == S9X_16_BITS ? ((uint16) (*((m) + (o)) + (*((m) + (o) + 1) << 8))) : \
(s) == S9X_24_BITS ? ((uint32) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16))) : \
((uint32) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16) + (*((m) + (o) + 3) << 24))))
#define _DS(s,m,o) \
((s) == S9X_8_BITS ? ((int8) *((m) + (o))) : \
(s) == S9X_16_BITS ? ((int16) (*((m) + (o)) + (*((m) + (o) + 1) << 8))) : \
(s) == S9X_24_BITS ? (((int32) ((*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16)) << 8)) >> 8): \
((int32) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16) + (*((m) + (o) + 3) << 24))))
void S9xSearchForChange (SCheatData *d, S9xCheatComparisonType cmp,
S9xCheatDataSize size, bool8 is_signed, bool8 update)
{
int l;
switch (size)
{
case S9X_8_BITS: l = 0; break;
case S9X_16_BITS: l = 1; break;
case S9X_24_BITS: l = 2; break;
default:
case S9X_32_BITS: l = 3; break;
}
int i;
if (is_signed)
{
for (i = 0; i < 0x20000 - l; i++)
{
if (TEST_BIT (d->WRAM_BITS, i) &&
_C(cmp, _DS(size, d->RAM, i), _DS(size, d->CWRAM, i)))
{
if (update)
d->CWRAM [i] = d->RAM [i];
}
else
BIT_CLEAR (d->WRAM_BITS, i);
}
for (i = 0; i < 0x10000 - l; i++)
{
if (TEST_BIT (d->SRAM_BITS, i) &&
_C(cmp, _DS(size, d->SRAM, i), _DS(size, d->CSRAM, i)))
{
if (update)
d->CSRAM [i] = d->SRAM [i];
}
else
BIT_CLEAR (d->SRAM_BITS, i);
}
for (i = 0; i < 0x2000 - l; i++)
{
if (TEST_BIT (d->IRAM_BITS, i) &&
_C(cmp, _DS(size, d->FillRAM + 0x3000, i), _DS(size, d->CIRAM, i)))
{
if (update)
d->CIRAM [i] = d->FillRAM [i + 0x3000];
}
else
BIT_CLEAR (d->IRAM_BITS, i);
}
}
else
{
for (i = 0; i < 0x20000 - l; i++)
{
if (TEST_BIT (d->WRAM_BITS, i) &&
_C(cmp, _D(size, d->RAM, i), _D(size, d->CWRAM, i)))
{
if (update)
d->CWRAM [i] = d->RAM [i];
}
else
BIT_CLEAR (d->WRAM_BITS, i);
}
for (i = 0; i < 0x10000 - l; i++)
{
if (TEST_BIT (d->SRAM_BITS, i) &&
_C(cmp, _D(size, d->SRAM, i), _D(size, d->CSRAM, i)))
{
if (update)
d->CSRAM [i] = d->SRAM [i];
}
else
BIT_CLEAR (d->SRAM_BITS, i);
}
for (i = 0; i < 0x2000 - l; i++)
{
if (TEST_BIT (d->IRAM_BITS, i) &&
_C(cmp, _D(size, d->FillRAM + 0x3000, i), _D(size, d->CIRAM, i)))
{
if (update)
d->CIRAM [i] = d->FillRAM [i + 0x3000];
}
else
BIT_CLEAR (d->IRAM_BITS, i);
}
}
}
void S9xSearchForValue (SCheatData *d, S9xCheatComparisonType cmp,
S9xCheatDataSize size, uint32 value,
bool8 is_signed, bool8 update)
{
int l;
switch (size)
{
case S9X_8_BITS: l = 0; break;
case S9X_16_BITS: l = 1; break;
case S9X_24_BITS: l = 2; break;
default:
case S9X_32_BITS: l = 3; break;
}
int i;
if (is_signed)
{
for (i = 0; i < 0x20000 - l; i++)
{
if (TEST_BIT (d->WRAM_BITS, i) &&
_C(cmp, _DS(size, d->RAM, i), (int32) value))
{
if (update)
d->CWRAM [i] = d->RAM [i];
}
else
BIT_CLEAR (d->WRAM_BITS, i);
}
for (i = 0; i < 0x10000 - l; i++)
{
if (TEST_BIT (d->SRAM_BITS, i) &&
_C(cmp, _DS(size, d->SRAM, i), (int32) value))
{
if (update)
d->CSRAM [i] = d->SRAM [i];
}
else
BIT_CLEAR (d->SRAM_BITS, i);
}
for (i = 0; i < 0x2000 - l; i++)
{
if (TEST_BIT (d->IRAM_BITS, i) &&
_C(cmp, _DS(size, d->FillRAM + 0x3000, i), (int32) value))
{
if (update)
d->CIRAM [i] = d->FillRAM [i + 0x3000];
}
else
BIT_CLEAR (d->IRAM_BITS, i);
}
}
else
{
for (i = 0; i < 0x20000 - l; i++)
{
if (TEST_BIT (d->WRAM_BITS, i) &&
_C(cmp, _D(size, d->RAM, i), value))
{
if (update)
d->CWRAM [i] = d->RAM [i];
}
else
BIT_CLEAR (d->WRAM_BITS, i);
}
for (i = 0; i < 0x10000 - l; i++)
{
if (TEST_BIT (d->SRAM_BITS, i) &&
_C(cmp, _D(size, d->SRAM, i), value))
{
if (update)
d->CSRAM [i] = d->SRAM [i];
}
else
BIT_CLEAR (d->SRAM_BITS, i);
}
for (i = 0; i < 0x2000 - l; i++)
{
if (TEST_BIT (d->IRAM_BITS, i) &&
_C(cmp, _D(size, d->FillRAM + 0x3000, i), value))
{
if (update)
d->CIRAM [i] = d->FillRAM [i + 0x3000];
}
else
BIT_CLEAR (d->IRAM_BITS, i);
}
}
}
void S9xOutputCheatSearchResults (SCheatData *d)
{
int i;
for (i = 0; i < 0x20000; i++)
{
if (TEST_BIT (d->WRAM_BITS, i))
printf ("WRAM: %05x: %02x\n", i, d->RAM [i]);
}
for (i = 0; i < 0x10000; i++)
{
if (TEST_BIT (d->SRAM_BITS, i))
printf ("SRAM: %04x: %02x\n", i, d->SRAM [i]);
}
for (i = 0; i < 0x2000; i++)
{
if (TEST_BIT (d->IRAM_BITS, i))
printf ("IRAM: %05x: %02x\n", i, d->FillRAM [i + 0x3000]);
}
}
) is private.
