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snes9x/cheats.cpp

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Use a license stub everywhere. This points to the full license in the root directory.
2018-11-15 23:31:39 +00:00
/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
Initial 1.52 import
2010-09-25 15:46:12 +00:00
#include <ctype.h>
#include "snes9x.h"
#include "memmap.h"
#include "cheats.h"
#define WRAM_BITS ALL_BITS
#define SRAM_BITS ALL_BITS + (0x20000 >> 5)
#define IRAM_BITS ALL_BITS + (0x30000 >> 5)
#define BIT_CLEAR(a, v) (a)[(v) >> 5] &= ~(1 << ((v) & 31))
#define TEST_BIT(a, v) ((a)[(v) >> 5] & (1 << ((v) & 31)))
#define _S9XCHTC(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 _S9XCHTD(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 _S9XCHTDS(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 S9xStartCheatSearch (SCheatData *d)
{
memmove(d->CWRAM, d->RAM, 0x20000);
Add 128KByte SRAM support in cheats and netplay client
2021-08-25 17:12:11 +00:00
memmove(d->CSRAM, d->SRAM, 0x80000);
Initial 1.52 import
2010-09-25 15:46:12 +00:00
memmove(d->CIRAM, &d->FillRAM[0x3000], 0x2000);
memset((char *) d->ALL_BITS, 0xff, 0x32000 >> 3);
}
void S9xSearchForChange (SCheatData *d, S9xCheatComparisonType cmp, S9xCheatDataSize size, bool8 is_signed, bool8 update)
{
int l, i;
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;
}
if (is_signed)
{
for (i = 0; i < 0x20000 - l; i++)
{
if (TEST_BIT(d->WRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTDS(size, d->RAM, i), _S9XCHTDS(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) && _S9XCHTC(cmp, _S9XCHTDS(size, d->SRAM, i), _S9XCHTDS(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) && _S9XCHTC(cmp, _S9XCHTDS(size, d->FillRAM + 0x3000, i), _S9XCHTDS(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) && _S9XCHTC(cmp, _S9XCHTD(size, d->RAM, i), _S9XCHTD(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) && _S9XCHTC(cmp, _S9XCHTD(size, d->SRAM, i), _S9XCHTD(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) && _S9XCHTC(cmp, _S9XCHTD(size, d->FillRAM + 0x3000, i), _S9XCHTD(size, d->CIRAM, i)))
{
if (update)
d->CIRAM[i] = d->FillRAM[i + 0x3000];
}
else
BIT_CLEAR(d->IRAM_BITS, i);
}
}
for (i = 0x20000 - l; i < 0x20000; i++)
BIT_CLEAR(d->WRAM_BITS, i);
for (i = 0x10000 - l; i < 0x10000; i++)
BIT_CLEAR(d->SRAM_BITS, i);
}
void S9xSearchForValue (SCheatData *d, S9xCheatComparisonType cmp, S9xCheatDataSize size, uint32 value, bool8 is_signed, bool8 update)
{
int l, i;
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;
}
if (is_signed)
{
for (i = 0; i < 0x20000 - l; i++)
{
if (TEST_BIT(d->WRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTDS(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) && _S9XCHTC(cmp, _S9XCHTDS(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) && _S9XCHTC(cmp, _S9XCHTDS(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) && _S9XCHTC(cmp, _S9XCHTD(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) && _S9XCHTC(cmp, _S9XCHTD(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) && _S9XCHTC(cmp, _S9XCHTD(size, d->FillRAM + 0x3000, i), value))
{
if (update)
d->CIRAM[i] = d->FillRAM[i + 0x3000];
}
else
BIT_CLEAR(d->IRAM_BITS, i);
}
}
for (i = 0x20000 - l; i < 0x20000; i++)
BIT_CLEAR(d->WRAM_BITS, i);
for (i = 0x10000 - l; i < 0x10000; i++)
BIT_CLEAR(d->SRAM_BITS, i);
}
void S9xSearchForAddress (SCheatData *d, S9xCheatComparisonType cmp, S9xCheatDataSize size, uint32 value, bool8 update)
{
int l, i;
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;
}
for (i = 0; i < 0x20000 - l; i++)
{
if (TEST_BIT(d->WRAM_BITS, i) && _S9XCHTC(cmp, 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) && _S9XCHTC(cmp, i + 0x20000, (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) && _S9XCHTC(cmp, i + 0x30000, (int32) value))
{
if (update)
d->CIRAM[i] = d->FillRAM[i + 0x3000];
}
else
BIT_CLEAR(d->IRAM_BITS, i);
}
for (i = 0x20000 - l; i < 0x20000; i++)
BIT_CLEAR(d->WRAM_BITS, i);
for (i = 0x10000 - l; i < 0x10000; i++)
BIT_CLEAR(d->SRAM_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]);
}
}