mirror of
https://github.com/snes9xgit/snes9x.git
synced 2024-05-15 02:49:38 -04:00
305 lines
7.4 KiB
C++
305 lines
7.4 KiB
C++
/*****************************************************************************\
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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This file is licensed under the Snes9x License.
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For further information, consult the LICENSE file in the root directory.
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\*****************************************************************************/
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#include <ctype.h>
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#include "snes9x.h"
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#include "memmap.h"
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#include "cheats.h"
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#define WRAM_BITS ALL_BITS
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#define SRAM_BITS ALL_BITS + (0x20000 >> 5)
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#define IRAM_BITS ALL_BITS + (0x30000 >> 5)
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#define BIT_CLEAR(a, v) (a)[(v) >> 5] &= ~(1 << ((v) & 31))
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#define TEST_BIT(a, v) ((a)[(v) >> 5] & (1 << ((v) & 31)))
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#define _S9XCHTC(c, a, b) \
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((c) == S9X_LESS_THAN ? (a) < (b) : \
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(c) == S9X_GREATER_THAN ? (a) > (b) : \
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(c) == S9X_LESS_THAN_OR_EQUAL ? (a) <= (b) : \
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(c) == S9X_GREATER_THAN_OR_EQUAL ? (a) >= (b) : \
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(c) == S9X_EQUAL ? (a) == (b) : \
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(a) != (b))
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#define _S9XCHTD(s, m, o) \
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((s) == S9X_8_BITS ? ((uint8) (*((m) + (o)))) : \
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(s) == S9X_16_BITS ? ((uint16) (*((m) + (o)) + (*((m) + (o) + 1) << 8))) : \
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(s) == S9X_24_BITS ? ((uint32) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16))) : \
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((uint32) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16) + (*((m) + (o) + 3) << 24))))
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#define _S9XCHTDS(s, m, o) \
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((s) == S9X_8_BITS ? ((int8) (*((m) + (o)))) : \
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(s) == S9X_16_BITS ? ((int16) (*((m) + (o)) + (*((m) + (o) + 1) << 8))) : \
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(s) == S9X_24_BITS ? (((int32) ((*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16)) << 8)) >> 8): \
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((int32) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16) + (*((m) + (o) + 3) << 24))))
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void S9xStartCheatSearch (SCheatData *d)
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{
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memmove(d->CWRAM, d->RAM, 0x20000);
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memmove(d->CSRAM, d->SRAM, 0x80000);
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memmove(d->CIRAM, &d->FillRAM[0x3000], 0x2000);
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memset((char *) d->ALL_BITS, 0xff, 0x32000 >> 3);
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}
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void S9xSearchForChange (SCheatData *d, S9xCheatComparisonType cmp, S9xCheatDataSize size, bool8 is_signed, bool8 update)
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{
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int l, i;
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switch (size)
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{
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case S9X_8_BITS: l = 0; break;
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case S9X_16_BITS: l = 1; break;
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case S9X_24_BITS: l = 2; break;
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default:
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case S9X_32_BITS: l = 3; break;
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}
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if (is_signed)
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{
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for (i = 0; i < 0x20000 - l; i++)
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{
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if (TEST_BIT(d->WRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTDS(size, d->RAM, i), _S9XCHTDS(size, d->CWRAM, i)))
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{
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if (update)
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d->CWRAM[i] = d->RAM[i];
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}
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else
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BIT_CLEAR(d->WRAM_BITS, i);
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}
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for (i = 0; i < 0x10000 - l; i++)
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{
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if (TEST_BIT(d->SRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTDS(size, d->SRAM, i), _S9XCHTDS(size, d->CSRAM, i)))
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{
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if (update)
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d->CSRAM[i] = d->SRAM[i];
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}
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else
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BIT_CLEAR(d->SRAM_BITS, i);
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}
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for (i = 0; i < 0x2000 - l; i++)
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{
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if (TEST_BIT(d->IRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTDS(size, d->FillRAM + 0x3000, i), _S9XCHTDS(size, d->CIRAM, i)))
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{
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if (update)
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d->CIRAM[i] = d->FillRAM[i + 0x3000];
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}
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else
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BIT_CLEAR(d->IRAM_BITS, i);
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}
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}
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else
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{
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for (i = 0; i < 0x20000 - l; i++)
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{
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if (TEST_BIT(d->WRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTD(size, d->RAM, i), _S9XCHTD(size, d->CWRAM, i)))
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{
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if (update)
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d->CWRAM[i] = d->RAM[i];
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}
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else
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BIT_CLEAR(d->WRAM_BITS, i);
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}
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for (i = 0; i < 0x10000 - l; i++)
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{
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if (TEST_BIT(d->SRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTD(size, d->SRAM, i), _S9XCHTD(size, d->CSRAM, i)))
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{
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if (update)
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d->CSRAM[i] = d->SRAM[i];
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}
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else
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BIT_CLEAR(d->SRAM_BITS, i);
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}
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for (i = 0; i < 0x2000 - l; i++)
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{
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if (TEST_BIT(d->IRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTD(size, d->FillRAM + 0x3000, i), _S9XCHTD(size, d->CIRAM, i)))
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{
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if (update)
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d->CIRAM[i] = d->FillRAM[i + 0x3000];
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}
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else
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BIT_CLEAR(d->IRAM_BITS, i);
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}
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}
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for (i = 0x20000 - l; i < 0x20000; i++)
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BIT_CLEAR(d->WRAM_BITS, i);
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for (i = 0x10000 - l; i < 0x10000; i++)
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BIT_CLEAR(d->SRAM_BITS, i);
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}
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void S9xSearchForValue (SCheatData *d, S9xCheatComparisonType cmp, S9xCheatDataSize size, uint32 value, bool8 is_signed, bool8 update)
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{
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int l, i;
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switch (size)
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{
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case S9X_8_BITS: l = 0; break;
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case S9X_16_BITS: l = 1; break;
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case S9X_24_BITS: l = 2; break;
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default:
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case S9X_32_BITS: l = 3; break;
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}
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if (is_signed)
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{
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for (i = 0; i < 0x20000 - l; i++)
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{
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if (TEST_BIT(d->WRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTDS(size, d->RAM, i), (int32) value))
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{
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if (update)
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d->CWRAM[i] = d->RAM[i];
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}
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else
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BIT_CLEAR(d->WRAM_BITS, i);
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}
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for (i = 0; i < 0x10000 - l; i++)
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{
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if (TEST_BIT(d->SRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTDS(size, d->SRAM, i), (int32) value))
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{
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if (update)
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d->CSRAM[i] = d->SRAM[i];
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}
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else
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BIT_CLEAR(d->SRAM_BITS, i);
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}
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for (i = 0; i < 0x2000 - l; i++)
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{
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if (TEST_BIT(d->IRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTDS(size, d->FillRAM + 0x3000, i), (int32) value))
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{
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if (update)
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d->CIRAM[i] = d->FillRAM[i + 0x3000];
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}
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else
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BIT_CLEAR(d->IRAM_BITS, i);
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}
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}
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else
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{
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for (i = 0; i < 0x20000 - l; i++)
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{
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if (TEST_BIT(d->WRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTD(size, d->RAM, i), value))
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{
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if (update)
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d->CWRAM[i] = d->RAM[i];
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}
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else
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BIT_CLEAR(d->WRAM_BITS, i);
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}
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for (i = 0; i < 0x10000 - l; i++)
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{
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if (TEST_BIT(d->SRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTD(size, d->SRAM, i), value))
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{
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if (update)
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d->CSRAM[i] = d->SRAM[i];
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}
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else
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BIT_CLEAR(d->SRAM_BITS, i);
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}
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for (i = 0; i < 0x2000 - l; i++)
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{
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if (TEST_BIT(d->IRAM_BITS, i) && _S9XCHTC(cmp, _S9XCHTD(size, d->FillRAM + 0x3000, i), value))
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{
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if (update)
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d->CIRAM[i] = d->FillRAM[i + 0x3000];
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}
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else
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BIT_CLEAR(d->IRAM_BITS, i);
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}
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}
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for (i = 0x20000 - l; i < 0x20000; i++)
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BIT_CLEAR(d->WRAM_BITS, i);
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for (i = 0x10000 - l; i < 0x10000; i++)
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BIT_CLEAR(d->SRAM_BITS, i);
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}
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void S9xSearchForAddress (SCheatData *d, S9xCheatComparisonType cmp, S9xCheatDataSize size, uint32 value, bool8 update)
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{
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int l, i;
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switch (size)
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{
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case S9X_8_BITS: l = 0; break;
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case S9X_16_BITS: l = 1; break;
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case S9X_24_BITS: l = 2; break;
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default:
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case S9X_32_BITS: l = 3; break;
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}
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for (i = 0; i < 0x20000 - l; i++)
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{
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if (TEST_BIT(d->WRAM_BITS, i) && _S9XCHTC(cmp, i, (int32) value))
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{
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if (update)
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d->CWRAM[i] = d->RAM[i];
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}
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else
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BIT_CLEAR(d->WRAM_BITS, i);
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}
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for (i = 0; i < 0x10000 - l; i++)
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{
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if (TEST_BIT(d->SRAM_BITS, i) && _S9XCHTC(cmp, i + 0x20000, (int32) value))
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{
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if (update)
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d->CSRAM[i] = d->SRAM[i];
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}
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else
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BIT_CLEAR(d->SRAM_BITS, i);
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}
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for (i = 0; i < 0x2000 - l; i++)
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{
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if (TEST_BIT(d->IRAM_BITS, i) && _S9XCHTC(cmp, i + 0x30000, (int32) value))
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{
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if (update)
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d->CIRAM[i] = d->FillRAM[i + 0x3000];
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}
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else
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BIT_CLEAR(d->IRAM_BITS, i);
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}
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for (i = 0x20000 - l; i < 0x20000; i++)
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BIT_CLEAR(d->WRAM_BITS, i);
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for (i = 0x10000 - l; i < 0x10000; i++)
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BIT_CLEAR(d->SRAM_BITS, i);
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}
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void S9xOutputCheatSearchResults (SCheatData *d)
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{
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int i;
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for (i = 0; i < 0x20000; i++)
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{
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if (TEST_BIT(d->WRAM_BITS, i))
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printf("WRAM: %05x: %02x\n", i, d->RAM[i]);
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}
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for (i = 0; i < 0x10000; i++)
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{
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if (TEST_BIT(d->SRAM_BITS, i))
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printf("SRAM: %04x: %02x\n", i, d->SRAM[i]);
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}
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for (i = 0; i < 0x2000; i++)
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{
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if (TEST_BIT(d->IRAM_BITS, i))
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printf("IRAM: %05x: %02x\n", i, d->FillRAM[i + 0x3000]);
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}
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}
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