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|
#include "../copyright"
#ifdef WANT_CHEATS
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "snes9x.h"
#include "cheats.h"
#include "memmap.h"
static bool S9xAllHex(const char* code, int len)
{
int i;
for (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_t* address,
uint8_t* byte)
{
uint32_t 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_t) data;
return (NULL);
}
const char* S9xGoldFingerToRaw(const char* code, uint32_t* address, bool* sram,
uint8_t* num_bytes, uint8_t 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_t) byte;
}
*num_bytes = i;
*sram = code [13] == '1';
return (NULL);
}
const char* S9xGameGenieToRaw(const char* code, uint32_t* address, uint8_t* 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";
int i;
for (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_t data = 0;
sscanf(new_code, "%x", &data);
*byte = (uint8_t)(data >> 24);
*address = ((data & 0x003c00) << 10) +
((data & 0x00003c) << 14) +
((data & 0xf00000) >> 8) +
((data & 0x000003) << 10) +
((data & 0x00c000) >> 6) +
((data & 0x0f0000) >> 12) +
((data & 0x0003c0) >> 6);
return (NULL);
}
void S9xStartCheatSearch(SCheatData* d)
{
// memmove may be required: Source is usually a different malloc, but could be pointed to d->CWRAM [Neb]
memmove(d->CWRAM, d->RAM, 0x20000);
// memmove may be required: Source is usually a different malloc, but could be pointed to d->CSRAM [Neb]
memmove(d->CSRAM, d->SRAM, 0x10000);
// memmove may be required: Source is usually a different malloc, but could be pointed to d->CIRAM [Neb]
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 CHEATS_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_t) (*((m) + (o))) : \
(s) == S9X_16_BITS ? ((uint16_t) (*((m) + (o)) + (*((m) + (o) + 1) << 8))) : \
(s) == S9X_24_BITS ? ((uint32_t) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16))) : \
((uint32_t) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16) + (*((m) + (o) + 3) << 24))))
#define _DS(s,m,o) \
((s) == S9X_8_BITS ? ((int8_t) *((m) + (o))) : \
(s) == S9X_16_BITS ? ((int16_t) (*((m) + (o)) + (*((m) + (o) + 1) << 8))) : \
(s) == S9X_24_BITS ? (((int32_t) ((*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16)) << 8)) >> 8): \
((int32_t) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16) + (*((m) + (o) + 3) << 24))))
void S9xSearchForChange(SCheatData* d, S9xCheatComparisonType cmp,
S9xCheatDataSize size, bool is_signed, bool 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) &&
CHEATS_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) &&
CHEATS_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) &&
CHEATS_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) &&
CHEATS_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) &&
CHEATS_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) &&
CHEATS_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_t value,
bool is_signed, bool 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) &&
CHEATS_C(cmp, _DS(size, d->RAM, i), (int32_t) 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) &&
CHEATS_C(cmp, _DS(size, d->SRAM, i), (int32_t) 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) &&
CHEATS_C(cmp, _DS(size, d->FillRAM + 0x3000, i), (int32_t) 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) &&
CHEATS_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) &&
CHEATS_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) &&
CHEATS_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]);
}
}
#endif
|
