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411 lines
9.8 KiB
411 lines
9.8 KiB
/*****************************************************************************\
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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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static bool8 S9xAllHex (const char *, int);
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static bool8 S9xAllHex (const char *code, int len)
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{
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for (int i = 0; i < len; i++)
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if ((code[i] < '0' || code[i] > '9') && (code[i] < 'a' || code[i] > 'f') && (code[i] < 'A' || code[i] > 'F'))
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return (FALSE);
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return (TRUE);
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}
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const char * S9xProActionReplayToRaw (const char *code, uint32 &address, uint8 &byte)
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{
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uint32 data = 0;
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if (strlen(code) != 8 || !S9xAllHex(code, 8) || sscanf(code, "%x", &data) != 1)
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return ("Invalid Pro Action Replay code - should be 8 hex digits in length.");
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address = data >> 8;
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byte = (uint8) data;
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return (NULL);
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}
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const char * S9xGoldFingerToRaw (const char *code, uint32 &address, bool8 &sram, uint8 &num_bytes, uint8 bytes[3])
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{
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char tmp[15];
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int i;
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if (strlen(code) != 14)
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return ("Invalid Gold Finger code - should be 14 hex digits in length.");
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strncpy(tmp, code, 5);
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tmp[5] = 0;
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if (sscanf(tmp, "%x", &address) != 1)
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return ("Invalid Gold Finger code.");
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// Correct GoldFinger Address
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address = (address & 0x7FFF) | ((address & 0x7F8000) << 1) | 0x8000;
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for (i = 0; i < 3; i++)
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{
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unsigned int byte;
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strncpy(tmp, code + 5 + i * 2, 2);
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tmp[2] = 0;
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if (sscanf(tmp, "%x", &byte) != 1)
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break;
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bytes[i] = (uint8) byte;
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}
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num_bytes = i;
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sram = code[13] == '1';
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return (NULL);
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}
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const char * S9xGameGenieToRaw (const char *code, uint32 &address, uint8 &byte)
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{
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char new_code[12];
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if (strlen(code) != 9 || *(code + 4) != '-' || !S9xAllHex(code, 4) || !S9xAllHex(code + 5, 4))
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return ("Invalid Game Genie(tm) code - should be 'xxxx-xxxx'.");
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strcpy(new_code, "0x");
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strncpy(new_code + 2, code, 4);
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strcpy(new_code + 6, code + 5);
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static const char *real_hex = "0123456789ABCDEF";
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static const char *genie_hex = "DF4709156BC8A23E";
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for (int i = 2; i < 10; i++)
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{
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if (islower(new_code[i]))
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new_code[i] = toupper(new_code[i]);
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int j;
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for (j = 0; j < 16; j++)
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{
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if (new_code[i] == genie_hex[j])
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{
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new_code[i] = real_hex[j];
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break;
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}
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}
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if (j == 16)
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return ("Invalid hex-character in Game Genie(tm) code.");
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}
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uint32 data = 0;
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sscanf(new_code, "%x", &data);
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byte = (uint8) (data >> 24);
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address = data & 0xffffff;
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address = ((address & 0x003c00) << 10) +
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((address & 0x00003c) << 14) +
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((address & 0xf00000) >> 8) +
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((address & 0x000003) << 10) +
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((address & 0x00c000) >> 6) +
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((address & 0x0f0000) >> 12) +
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((address & 0x0003c0) >> 6);
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return (NULL);
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}
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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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