pcsxr/libpcsxcore/cheat.c

1026 lines
20 KiB
C

/* Cheat Support for PCSX-Reloaded
* Copyright (c) 2009, Wei Mingzhi <whistler_wmz@users.sf.net>.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "psxcommon.h"
#include "r3000a.h"
#include "psxmem.h"
#include "cheat.h"
Cheat *Cheats = NULL;
int NumCheats = 0;
static int NumCheatsAllocated = 0;
CheatCode *CheatCodes = NULL;
int NumCodes = 0;
static int NumCodesAllocated = 0;
s8 *prevM = NULL;
u32 *SearchResults = NULL;
int NumSearchResults = 0;
static int NumSearchResultsAllocated = 0;
#define ALLOC_INCREMENT 100
void ClearAllCheats() {
int i;
if (Cheats != NULL) {
for (i = 0; i < NumCheats; i++) {
free(Cheats[i].Descr);
}
free(Cheats);
}
Cheats = NULL;
NumCheats = 0;
NumCheatsAllocated = 0;
if (CheatCodes != NULL) {
free(CheatCodes);
}
CheatCodes = NULL;
NumCodes = 0;
NumCodesAllocated = 0;
}
// load cheats from the specific filename
void LoadCheats(const char *filename) {
FILE *fp;
char buf[256];
int count = 0;
unsigned int t1, t2;
fp = fopen(filename, "r");
if (fp == NULL) {
SysPrintf(_("Could not load cheats from: %s\n"), filename);
return;
}
ClearAllCheats();
while (fgets(buf, 255, fp) != NULL) {
buf[255] = '\0';
trim(buf);
// Skip comment or blank lines
if (buf[0] == '#' || buf[0] == ';' || buf[0] == '/' || buf[0] == '\"' || buf[0] == '\0')
continue;
if (buf[0] == '[' && buf[strlen(buf) - 1] == ']') {
if (NumCheats > 0)
Cheats[NumCheats - 1].n = count;
if (NumCheats >= NumCheatsAllocated) {
NumCheatsAllocated += ALLOC_INCREMENT;
if (Cheats == NULL) {
assert(NumCheats == 0);
assert(NumCheatsAllocated == ALLOC_INCREMENT);
Cheats = (Cheat *)malloc(sizeof(Cheat) * NumCheatsAllocated);
} else {
Cheats = (Cheat *)realloc(Cheats, sizeof(Cheat) * NumCheatsAllocated);
}
}
buf[strlen(buf) - 1] = '\0';
count = 0;
if (buf[1] == '*') {
Cheats[NumCheats].Descr = strdup(buf + 2);
Cheats[NumCheats].Enabled = 1;
} else {
Cheats[NumCheats].Descr = strdup(buf + 1);
Cheats[NumCheats].Enabled = 0;
}
Cheats[NumCheats].First = NumCodes;
NumCheats++;
continue;
}
if (NumCheats <= 0)
continue;
if (NumCodes >= NumCodesAllocated) {
NumCodesAllocated += ALLOC_INCREMENT;
if (CheatCodes == NULL) {
assert(NumCodes == 0);
assert(NumCodesAllocated == ALLOC_INCREMENT);
CheatCodes = (CheatCode *)malloc(sizeof(CheatCode) * NumCodesAllocated);
} else {
CheatCodes = (CheatCode *)realloc(CheatCodes, sizeof(CheatCode) * NumCodesAllocated);
}
}
sscanf(buf, "%x %x", &t1, &t2);
CheatCodes[NumCodes].Addr = t1;
CheatCodes[NumCodes].Val = t2;
NumCodes++;
count++;
}
if (NumCheats > 0)
Cheats[NumCheats - 1].n = count;
fclose(fp);
SysPrintf(_("Cheats loaded from: %s\n"), filename);
}
// save all cheats to the specified filename
void SaveCheats(const char *filename) {
FILE *fp;
int i, j;
fp = fopen(filename, "w");
if (fp == NULL) {
return;
}
for (i = 0; i < NumCheats; i++) {
// write the description
if (Cheats[i].Enabled)
fprintf(fp, "[*%s]\n", Cheats[i].Descr);
else
fprintf(fp, "[%s]\n", Cheats[i].Descr);
// write all cheat codes
for (j = 0; j < Cheats[i].n; j++) {
fprintf(fp, "%.8X %.4X\n",
CheatCodes[Cheats[i].First + j].Addr,
CheatCodes[Cheats[i].First + j].Val);
}
fprintf(fp, "\n");
}
fclose(fp);
SysPrintf(_("Cheats saved to: %s\n"), filename);
}
// apply all enabled cheats
void ApplyCheats() {
int i, j, k, endindex;
for (i = 0; i < NumCheats; i++) {
if (!Cheats[i].Enabled) {
continue;
}
// process all cheat codes
endindex = Cheats[i].First + Cheats[i].n;
for (j = Cheats[i].First; j < endindex; j++) {
u8 type = (uint8_t)(CheatCodes[j].Addr >> 24);
u32 addr = (CheatCodes[j].Addr & 0x001FFFFF);
u16 val = CheatCodes[j].Val;
u32 taddr;
switch (type) {
case CHEAT_CONST8:
psxMu8ref(addr) = (u8)val;
break;
case CHEAT_CONST16:
psxMu16ref(addr) = SWAPu16(val);
break;
case CHEAT_INC16:
psxMu16ref(addr) = SWAPu16(psxMu16(addr) + val);
break;
case CHEAT_DEC16:
psxMu16ref(addr) = SWAPu16(psxMu16(addr) - val);
break;
case CHEAT_INC8:
psxMu8ref(addr) += (u8)val;
break;
case CHEAT_DEC8:
psxMu8ref(addr) -= (u8)val;
break;
case CHEAT_SLIDE:
j++;
if (j >= endindex)
break;
type = (uint8_t)(CheatCodes[j].Addr >> 24);
taddr = (CheatCodes[j].Addr & 0x001FFFFF);
val = CheatCodes[j].Val;
if (type == CHEAT_CONST8) {
for (k = 0; k < ((addr >> 8) & 0xFF); k++) {
psxMu8ref(taddr) = (u8)val;
taddr += (s8)(addr & 0xFF);
val += (s8)(CheatCodes[j - 1].Val & 0xFF);
}
}
else if (type == CHEAT_CONST16) {
for (k = 0; k < ((addr >> 8) & 0xFF); k++) {
psxMu16ref(taddr) = SWAPu16(val);
taddr += (s8)(addr & 0xFF);
val += (s8)(CheatCodes[j - 1].Val & 0xFF);
}
}
break;
case CHEAT_MEMCPY:
j++;
if (j >= endindex)
break;
taddr = (CheatCodes[j].Addr & 0x001FFFFF);
for (k = 0; k < val; k++) {
psxMu8ref(taddr + k) = PSXMu8(addr + k);
}
break;
case CHEAT_EQU8:
if (PSXMu8(addr) != (u8)val)
j++; // skip the next code
break;
case CHEAT_NOTEQU8:
if (PSXMu8(addr) == (u8)val)
j++; // skip the next code
break;
case CHEAT_LESSTHAN8:
if (PSXMu8(addr) >= (u8)val)
j++; // skip the next code
break;
case CHEAT_GREATERTHAN8:
if (PSXMu8(addr) <= (u8)val)
j++; // skip the next code
break;
case CHEAT_EQU16:
if (PSXMu16(addr) != val)
j++; // skip the next code
break;
case CHEAT_NOTEQU16:
if (PSXMu16(addr) == val)
j++; // skip the next code
break;
case CHEAT_LESSTHAN16:
if (PSXMu16(addr) >= val)
j++; // skip the next code
break;
case CHEAT_GREATERTHAN16:
if (PSXMu16(addr) <= val)
j++; // skip the next code
break;
}
}
}
}
int AddCheat(const char *descr, char *code) {
int c = 1;
char *p1, *p2;
if (NumCheats >= NumCheatsAllocated) {
NumCheatsAllocated += ALLOC_INCREMENT;
if (Cheats == NULL) {
assert(NumCheats == 0);
assert(NumCheatsAllocated == ALLOC_INCREMENT);
Cheats = (Cheat *)malloc(sizeof(Cheat) * NumCheatsAllocated);
}
else {
Cheats = (Cheat *)realloc(Cheats, sizeof(Cheat) * NumCheatsAllocated);
}
}
Cheats[NumCheats].Descr = strdup(descr[0] ? descr : _("(Untitled)"));
Cheats[NumCheats].Enabled = 0;
Cheats[NumCheats].First = NumCodes;
Cheats[NumCheats].n = 0;
p1 = code;
p2 = code;
while (c) {
unsigned int t1, t2;
while (*p2 != '\n' && *p2 != '\0')
p2++;
if (*p2 == '\0')
c = 0;
*p2 = '\0';
p2++;
t1 = 0;
t2 = 0;
sscanf(p1, "%x %x", &t1, &t2);
if (t1 > 0x10000000) {
if (NumCodes >= NumCodesAllocated) {
NumCodesAllocated += ALLOC_INCREMENT;
if (CheatCodes == NULL) {
assert(NumCodes == 0);
assert(NumCodesAllocated == ALLOC_INCREMENT);
CheatCodes = (CheatCode *)malloc(sizeof(CheatCode) * NumCodesAllocated);
}
else {
CheatCodes = (CheatCode *)realloc(CheatCodes, sizeof(CheatCode) * NumCodesAllocated);
}
}
CheatCodes[NumCodes].Addr = t1;
CheatCodes[NumCodes].Val = t2;
NumCodes++;
Cheats[NumCheats].n++;
}
p1 = p2;
}
if (Cheats[NumCheats].n == 0) {
return -1;
}
NumCheats++;
return 0;
}
void RemoveCheat(int index) {
assert(index >= 0 && index < NumCheats);
free(Cheats[index].Descr);
while (index < NumCheats - 1) {
Cheats[index] = Cheats[index + 1];
index++;
}
NumCheats--;
}
int EditCheat(int index, const char *descr, char *code) {
int c = 1;
int prev = NumCodes;
char *p1, *p2;
assert(index >= 0 && index < NumCheats);
p1 = code;
p2 = code;
while (c) {
unsigned int t1, t2;
while (*p2 != '\n' && *p2 != '\0')
p2++;
if (*p2 == '\0')
c = 0;
*p2 = '\0';
p2++;
t1 = 0;
t2 = 0;
sscanf(p1, "%x %x", &t1, &t2);
if (t1 > 0x10000000) {
if (NumCodes >= NumCodesAllocated) {
NumCodesAllocated += ALLOC_INCREMENT;
if (CheatCodes == NULL) {
assert(NumCodes == 0);
assert(NumCodesAllocated == ALLOC_INCREMENT);
CheatCodes = (CheatCode *)malloc(sizeof(CheatCode) * NumCodesAllocated);
}
else {
CheatCodes = (CheatCode *)realloc(CheatCodes, sizeof(CheatCode) * NumCodesAllocated);
}
}
CheatCodes[NumCodes].Addr = t1;
CheatCodes[NumCodes].Val = t2;
NumCodes++;
}
p1 = p2;
}
if (NumCodes == prev) {
return -1;
}
free(Cheats[index].Descr);
Cheats[index].Descr = strdup(descr[0] ? descr : _("(Untitled)"));
Cheats[index].First = prev;
Cheats[index].n = NumCodes - prev;
return 0;
}
void FreeCheatSearchResults() {
if (SearchResults != NULL) {
free(SearchResults);
}
SearchResults = NULL;
NumSearchResults = 0;
NumSearchResultsAllocated = 0;
}
void FreeCheatSearchMem() {
if (prevM != NULL) {
free(prevM);
}
prevM = NULL;
}
void CheatSearchBackupMemory() {
if (prevM != NULL) {
memcpy(prevM, psxM, 0x200000);
}
}
static void CheatSearchInitBackupMemory() {
if (prevM == NULL) {
prevM = (s8 *)malloc(0x200000);
CheatSearchBackupMemory();
}
}
static void CheatSearchAddResult(u32 addr) {
if (NumSearchResults >= NumSearchResultsAllocated) {
NumSearchResultsAllocated += ALLOC_INCREMENT;
if (SearchResults == NULL) {
SearchResults = (u32 *)malloc(sizeof(u32) * NumSearchResultsAllocated);
}
else {
SearchResults = (u32 *)realloc(SearchResults, sizeof(u32) * NumSearchResultsAllocated);
}
}
SearchResults[NumSearchResults++] = addr;
}
void CheatSearchEqual8(u8 val) {
u32 i, j;
CheatSearchInitBackupMemory();
if (SearchResults == NULL) {
// search the whole memory
for (i = 0; i < 0x200000; i++) {
if (PSXMu8(i) == val) {
CheatSearchAddResult(i);
}
}
}
else {
// only search within the previous results
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu8(SearchResults[i]) == val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
}
void CheatSearchEqual16(u16 val) {
u32 i, j;
CheatSearchInitBackupMemory();
if (SearchResults == NULL) {
// search the whole memory
for (i = 0; i < 0x200000; i += 2) {
if (PSXMu16(i) == val) {
CheatSearchAddResult(i);
}
}
}
else {
// only search within the previous results
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu16(SearchResults[i]) == val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
}
void CheatSearchEqual32(u32 val) {
u32 i, j;
CheatSearchInitBackupMemory();
if (SearchResults == NULL) {
// search the whole memory
for (i = 0; i < 0x200000; i += 4) {
if (PSXMu32(i) == val) {
CheatSearchAddResult(i);
}
}
}
else {
// only search within the previous results
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu32(SearchResults[i]) == val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
}
void CheatSearchNotEqual8(u8 val) {
u32 i, j;
CheatSearchInitBackupMemory();
if (SearchResults == NULL) {
// search the whole memory
for (i = 0; i < 0x200000; i++) {
if (PSXMu8(i) != val) {
CheatSearchAddResult(i);
}
}
}
else {
// only search within the previous results
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu8(SearchResults[i]) != val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
}
void CheatSearchNotEqual16(u16 val) {
u32 i, j;
CheatSearchInitBackupMemory();
if (SearchResults == NULL) {
// search the whole memory
for (i = 0; i < 0x200000; i += 2) {
if (PSXMu16(i) != val) {
CheatSearchAddResult(i);
}
}
}
else {
// only search within the previous results
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu16(SearchResults[i]) != val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
}
void CheatSearchNotEqual32(u32 val) {
u32 i, j;
CheatSearchInitBackupMemory();
if (SearchResults == NULL) {
// search the whole memory
for (i = 0; i < 0x200000; i += 4) {
if (PSXMu32(i) != val) {
CheatSearchAddResult(i);
}
}
}
else {
// only search within the previous results
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu32(SearchResults[i]) != val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
}
void CheatSearchRange8(u8 min, u8 max) {
u32 i, j;
CheatSearchInitBackupMemory();
if (SearchResults == NULL) {
// search the whole memory
for (i = 0; i < 0x200000; i++) {
if (PSXMu8(i) >= min && PSXMu8(i) <= max) {
CheatSearchAddResult(i);
}
}
}
else {
// only search within the previous results
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu8(SearchResults[i]) >= min && PSXMu8(SearchResults[i]) <= max) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
}
void CheatSearchRange16(u16 min, u16 max) {
u32 i, j;
CheatSearchInitBackupMemory();
if (SearchResults == NULL) {
// search the whole memory
for (i = 0; i < 0x200000; i += 2) {
if (PSXMu16(i) >= min && PSXMu16(i) <= max) {
CheatSearchAddResult(i);
}
}
}
else {
// only search within the previous results
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu16(SearchResults[i]) >= min && PSXMu16(SearchResults[i]) <= max) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
}
void CheatSearchRange32(u32 min, u32 max) {
u32 i, j;
CheatSearchInitBackupMemory();
if (SearchResults == NULL) {
// search the whole memory
for (i = 0; i < 0x200000; i += 4) {
if (PSXMu32(i) >= min && PSXMu32(i) <= max) {
CheatSearchAddResult(i);
}
}
}
else {
// only search within the previous results
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu32(SearchResults[i]) >= min && PSXMu32(SearchResults[i]) <= max) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
}
void CheatSearchIncreasedBy8(u8 val) {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu8(SearchResults[i]) - PrevMu8(SearchResults[i]) == val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchIncreasedBy16(u16 val) {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu16(SearchResults[i]) - PrevMu16(SearchResults[i]) == val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchIncreasedBy32(u32 val) {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PSXMu32(SearchResults[i]) - PrevMu32(SearchResults[i]) == val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchDecreasedBy8(u8 val) {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu8(SearchResults[i]) - PSXMu8(SearchResults[i]) == val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchDecreasedBy16(u16 val) {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu16(SearchResults[i]) - PSXMu16(SearchResults[i]) == val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchDecreasedBy32(u32 val) {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu32(SearchResults[i]) - PSXMu32(SearchResults[i]) == val) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchIncreased8() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu8(SearchResults[i]) < PSXMu8(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchIncreased16() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu16(SearchResults[i]) < PSXMu16(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchIncreased32() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu32(SearchResults[i]) < PSXMu32(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchDecreased8() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu8(SearchResults[i]) > PSXMu8(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchDecreased16() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu16(SearchResults[i]) > PSXMu16(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchDecreased32() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu32(SearchResults[i]) > PSXMu32(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchDifferent8() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu8(SearchResults[i]) != PSXMu8(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchDifferent16() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu16(SearchResults[i]) != PSXMu16(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchDifferent32() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu32(SearchResults[i]) != PSXMu32(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchNoChange8() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu8(SearchResults[i]) == PSXMu8(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchNoChange16() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu16(SearchResults[i]) == PSXMu16(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}
void CheatSearchNoChange32() {
u32 i, j;
assert(prevM != NULL); // not possible for the first search
j = 0;
for (i = 0; i < NumSearchResults; i++) {
if (PrevMu32(SearchResults[i]) == PSXMu32(SearchResults[i])) {
SearchResults[j++] = SearchResults[i];
}
}
NumSearchResults = j;
}