Mercurial > vba-clojure

view src/gba/GBACheats.cpp @ 609:65b7c5b47de1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
first draft of explination.
author Robert McIntyre <rlm@mit.edu>
date Thu, 22 Nov 2012 10:54:59 -0600
parents f9f4f1b99eed
children
line wrap: on
line source
     1 #include <cstdio>



     2 #include <cctype>



     3 #include <cstring>



     4 



     5 #include "../common/System.h"



     6 #include "../common/Util.h"



     7 #include "../NLS.h"



     8 #include "GBACheats.h"



     9 #include "GBA.h"



    10 #include "GBAinline.h"



    11 #include "GBAGlobals.h"



    12 



    13 /**



    14  * Gameshark code types:



    15  *



    16  * NNNNNNNN 001DC0DE - ID code for the game (game 4 character name) from ROM



    17  * DEADFACE XXXXXXXX - changes decryption seeds



    18  * 0AAAAAAA 000000YY - 8-bit constant write



    19  * 1AAAAAAA 0000YYYY - 16-bit constant write



    20  * 2AAAAAAA YYYYYYYY - 32-bit constant write



    21  * 3AAAAAAA YYYYYYYY - ??



    22  * 6AAAAAAA 0000YYYY - 16-bit ROM Patch (address >> 1)



    23  * 6AAAAAAA 1000YYYY - 16-bit ROM Patch ? (address >> 1)



    24  * 6AAAAAAA 2000YYYY - 16-bit ROM Patch ? (address >> 1)



    25  * 8A1AAAAA 000000YY - 8-bit button write



    26  * 8A2AAAAA 0000YYYY - 16-bit button write



    27  * 8A3AAAAA YYYYYYYY - 32-bit button write



    28  * 80F00000 0000YYYY - button slow motion



    29  * DAAAAAAA 0000YYYY - if address contains 16-bit value enable next code



    30  * FAAAAAAA 0000YYYY - Master code function



    31  *



    32  * CodeBreaker codes types:



    33  *



    34  * 0000AAAA 000Y - Game CRC (Y are flags: 8 - CRC, 2 - DI)



    35  * 1AAAAAAA YYYY - Master Code function (store address at ((YYYY << 0x16)



    36  *                 + 0x08000100))



    37  * 2AAAAAAA YYYY - 16-bit or



    38  * 3AAAAAAA YYYY - 8-bit constant write



    39  * 4AAAAAAA YYYY - Slide code



    40  * XXXXCCCC IIII   (C is count and I is address increment, X is value incr.)



    41  * 5AAAAAAA CCCC - Super code (Write bytes to address, CCCC is count)



    42  * BBBBBBBB BBBB



    43  * 6AAAAAAA YYYY - 16-bit and



    44  * 7AAAAAAA YYYY - if address contains 16-bit value enable next code



    45  * 8AAAAAAA YYYY - 16-bit constant write



    46  * 9AAAAAAA YYYY - change decryption (when first code only?)



    47  * AAAAAAAA YYYY - if address does not contain 16-bit value enable next code



    48  * BAAAAAAA YYYY - if 16-bit < YYYY



    49  * CAAAAAAA YYYY - if 16-bit > YYYY



    50  * D0000020 YYYY - if button keys equal value enable next code



    51  * EAAAAAAA YYYY - increase value stored in address



    52  */



    53 #define UNKNOWN_CODE           -1



    54 #define INT_8_BIT_WRITE        0



    55 #define INT_16_BIT_WRITE       1



    56 #define INT_32_BIT_WRITE       2



    57 #define GSA_16_BIT_ROM_PATCH   3



    58 #define GSA_8_BIT_GS_WRITE     4



    59 #define GSA_16_BIT_GS_WRITE    5



    60 #define GSA_32_BIT_GS_WRITE    6



    61 #define CBA_IF_KEYS_PRESSED    7



    62 #define CBA_IF_TRUE            8



    63 #define CBA_SLIDE_CODE         9



    64 #define CBA_IF_FALSE           10



    65 #define CBA_AND                11



    66 #define GSA_8_BIT_GS_WRITE2    12



    67 #define GSA_16_BIT_GS_WRITE2   13



    68 #define GSA_32_BIT_GS_WRITE2   14



    69 #define GSA_16_BIT_ROM_PATCH2  15



    70 #define GSA_8_BIT_SLIDE        16



    71 #define GSA_16_BIT_SLIDE       17



    72 #define GSA_32_BIT_SLIDE       18



    73 #define GSA_8_BIT_IF_TRUE      19



    74 #define GSA_32_BIT_IF_TRUE     20



    75 #define GSA_8_BIT_IF_FALSE     21



    76 #define GSA_32_BIT_IF_FALSE    22



    77 #define GSA_8_BIT_FILL         23



    78 #define GSA_16_BIT_FILL        24



    79 #define GSA_8_BIT_IF_TRUE2     25



    80 #define GSA_16_BIT_IF_TRUE2    26



    81 #define GSA_32_BIT_IF_TRUE2    27



    82 #define GSA_8_BIT_IF_FALSE2    28



    83 #define GSA_16_BIT_IF_FALSE2   29



    84 #define GSA_32_BIT_IF_FALSE2   30



    85 #define GSA_SLOWDOWN           31



    86 #define CBA_ADD                32



    87 #define CBA_OR                 33



    88 #define CBA_LT                 34



    89 #define CBA_GT                 35



    90 #define CBA_SUPER              36



    91 



    92 CheatsData cheatsList[100];



    93 int        cheatsNumber = 0;



    94 



    95 u8   cheatsCBASeedBuffer[0x30];



    96 u32  cheatsCBASeed[4];



    97 u32  cheatsCBATemporaryValue = 0;



    98 u16  cheatsCBATable[256];



    99 bool cheatsCBATableGenerated = false;



   100 



   101 u8 cheatsCBACurrentSeed[12] = {



   102 	0x00, 0x00, 0x00, 0x00,



   103 	0x00, 0x00, 0x00, 0x00,



   104 	0x00, 0x00, 0x00, 0x00



   105 };



   106 



   107 #define CHEAT_IS_HEX(a) (((a) >= 'A' && (a) <= 'F') || ((a) >= '0' && (a) <= '9'))



   108 



   109 #define CHEAT_PATCH_ROM_16BIT(a, v) \



   110     WRITE16LE(((u16 *)&rom[(a) & 0x1ffffff]), v);



   111 



   112 static bool isMultilineWithData(int i)



   113 {



   114 	// we consider it a multiline code if it has more than one line of data



   115 	// otherwise, it can still be considered a single code



   116 	if (i < cheatsNumber && i >= 0)



   117 		switch (cheatsList[i].size)



   118 		{



   119 		case INT_8_BIT_WRITE:



   120 		case INT_16_BIT_WRITE:



   121 		case INT_32_BIT_WRITE:



   122 		case GSA_16_BIT_ROM_PATCH:



   123 		case GSA_8_BIT_GS_WRITE:



   124 		case GSA_16_BIT_GS_WRITE:



   125 		case GSA_32_BIT_GS_WRITE:



   126 		case CBA_AND:



   127 		case CBA_IF_KEYS_PRESSED:



   128 		case CBA_IF_TRUE:



   129 		case CBA_IF_FALSE:



   130 		case GSA_8_BIT_IF_TRUE:



   131 		case GSA_32_BIT_IF_TRUE:



   132 		case GSA_8_BIT_IF_FALSE:



   133 		case GSA_32_BIT_IF_FALSE:



   134 		case GSA_8_BIT_FILL:



   135 		case GSA_16_BIT_FILL:



   136 		case GSA_8_BIT_IF_TRUE2:



   137 		case GSA_16_BIT_IF_TRUE2:



   138 		case GSA_32_BIT_IF_TRUE2:



   139 		case GSA_8_BIT_IF_FALSE2:



   140 		case GSA_16_BIT_IF_FALSE2:



   141 		case GSA_32_BIT_IF_FALSE2:



   142 		case GSA_SLOWDOWN:



   143 		case CBA_ADD:



   144 		case CBA_OR:



   145 			return false;



   146 		// the codes below have two lines of data



   147 		case CBA_SLIDE_CODE:



   148 		case GSA_8_BIT_GS_WRITE2:



   149 		case GSA_16_BIT_GS_WRITE2:



   150 		case GSA_32_BIT_GS_WRITE2:



   151 		case GSA_16_BIT_ROM_PATCH2:



   152 		case GSA_8_BIT_SLIDE:



   153 		case GSA_16_BIT_SLIDE:



   154 		case GSA_32_BIT_SLIDE:



   155 		case CBA_LT:



   156 		case CBA_GT:



   157 		case CBA_SUPER:



   158 			return true;



   159 		}



   160 	return false;



   161 }



   162 



   163 static int getCodeLength(int num)



   164 {



   165 	if (num >= cheatsNumber || num < 0)



   166 		return 1;



   167 



   168 	// this is for all the codes that are true multiline



   169 	switch (cheatsList[num].size)



   170 	{



   171 	case INT_8_BIT_WRITE:



   172 	case INT_16_BIT_WRITE:



   173 	case INT_32_BIT_WRITE:



   174 	case GSA_16_BIT_ROM_PATCH:



   175 	case GSA_8_BIT_GS_WRITE:



   176 	case GSA_16_BIT_GS_WRITE:



   177 	case GSA_32_BIT_GS_WRITE:



   178 	case CBA_AND:



   179 	case GSA_8_BIT_FILL:



   180 	case GSA_16_BIT_FILL:



   181 	case GSA_SLOWDOWN:



   182 	case CBA_ADD:



   183 	case CBA_OR:



   184 		return 1;



   185 	case CBA_IF_KEYS_PRESSED:



   186 	case CBA_IF_TRUE:



   187 	case CBA_IF_FALSE:



   188 	case CBA_SLIDE_CODE:



   189 	case GSA_8_BIT_GS_WRITE2:



   190 	case GSA_16_BIT_GS_WRITE2:



   191 	case GSA_32_BIT_GS_WRITE2:



   192 	case GSA_16_BIT_ROM_PATCH2:



   193 	case GSA_8_BIT_SLIDE:



   194 	case GSA_16_BIT_SLIDE:



   195 	case GSA_32_BIT_SLIDE:



   196 	case GSA_8_BIT_IF_TRUE:



   197 	case GSA_32_BIT_IF_TRUE:



   198 	case GSA_8_BIT_IF_FALSE:



   199 	case GSA_32_BIT_IF_FALSE:



   200 	case CBA_LT:



   201 	case CBA_GT:



   202 		return 2;



   203 	case GSA_8_BIT_IF_TRUE2:



   204 	case GSA_16_BIT_IF_TRUE2:



   205 	case GSA_32_BIT_IF_TRUE2:



   206 	case GSA_8_BIT_IF_FALSE2:



   207 	case GSA_16_BIT_IF_FALSE2:



   208 	case GSA_32_BIT_IF_FALSE2:



   209 		return 3;



   210 	case CBA_SUPER:



   211 		return (cheatsList[num].value+5)/6;



   212 	}



   213 	return 1;



   214 }



   215 



   216 int cheatsCheckKeys(u32 keys, u32 extended)



   217 {



   218 	int ticks = 0;



   219 	for (int i = 0; i < cheatsNumber; i++)



   220 	{



   221 		if (!cheatsList[i].enabled)



   222 		{



   223 			// make sure we skip other lines in this code



   224 			i += getCodeLength(i)-1;



   225 			continue;



   226 		}



   227 		switch (cheatsList[i].size)



   228 		{



   229 		case INT_8_BIT_WRITE:



   230 			CPUWriteByte(cheatsList[i].address, cheatsList[i].value);



   231 			break;



   232 		case INT_16_BIT_WRITE:



   233 			CPUWriteHalfWord(cheatsList[i].address, cheatsList[i].value);



   234 			break;



   235 		case INT_32_BIT_WRITE:



   236 			CPUWriteMemory(cheatsList[i].address, cheatsList[i].value);



   237 			break;



   238 		case GSA_16_BIT_ROM_PATCH:



   239 			if ((cheatsList[i].status & 1) == 0)



   240 			{



   241 				if (CPUReadHalfWord(cheatsList[i].address) != cheatsList[i].value)



   242 				{



   243 					cheatsList[i].oldValue = CPUReadHalfWord(cheatsList[i].address);



   244 					cheatsList[i].status  |= 1;



   245 					CHEAT_PATCH_ROM_16BIT(cheatsList[i].address, cheatsList[i].value);



   246 				}



   247 			}



   248 			break;



   249 		case GSA_8_BIT_GS_WRITE:



   250 			if (extended & 4)



   251 			{



   252 				CPUWriteByte(cheatsList[i].address, cheatsList[i].value);



   253 			}



   254 			break;



   255 		case GSA_16_BIT_GS_WRITE:



   256 			if (extended & 4)



   257 			{



   258 				CPUWriteHalfWord(cheatsList[i].address, cheatsList[i].value);



   259 			}



   260 			break;



   261 		case GSA_32_BIT_GS_WRITE:



   262 			if (extended & 4)



   263 			{



   264 				CPUWriteMemory(cheatsList[i].address, cheatsList[i].value);



   265 			}



   266 			break;



   267 		case CBA_IF_KEYS_PRESSED:



   268 		{



   269 			u16 value = cheatsList[i].value;



   270 			u32 addr  = cheatsList[i].address;



   271 			if ((addr & 0x30) == 0x20)



   272 			{



   273 				if ((keys & value) != value)



   274 				{



   275 					i++;



   276 				}



   277 			}



   278 			else if ((addr & 0x30) == 0x10)



   279 			{



   280 				if ((keys & value) == value)



   281 				{



   282 					i++;



   283 				}



   284 			}



   285 			break;



   286 		}



   287 		case CBA_IF_TRUE:



   288 			if (CPUReadHalfWord(cheatsList[i].address) != cheatsList[i].value)



   289 			{



   290 				i++;



   291 			}



   292 			break;



   293 		case CBA_SLIDE_CODE:



   294 		{



   295 			u32 address = cheatsList[i].address;



   296 			u16 value   = cheatsList[i].value;



   297 			i++;



   298 			if (i < cheatsNumber)



   299 			{



   300 				int count = (cheatsList[i].address & 0xFFFF);



   301 				u16 vinc  = (cheatsList[i].address >> 16) & 0xFFFF;



   302 				int inc   = cheatsList[i].value;



   303 



   304 				for (int x = 0; x < count; x++)



   305 				{



   306 					CPUWriteHalfWord(address, value);



   307 					address += inc;



   308 					value   += vinc;



   309 				}



   310 			}



   311 			break;



   312 		}



   313 		case CBA_IF_FALSE:



   314 			if (CPUReadHalfWord(cheatsList[i].address) == cheatsList[i].value)



   315 			{



   316 				i++;



   317 			}



   318 			break;



   319 		case CBA_AND:



   320 			CPUWriteHalfWord(cheatsList[i].address,



   321 			                 CPUReadHalfWord(cheatsList[i].address) &



   322 			                 cheatsList[i].value);



   323 			break;



   324 		case GSA_8_BIT_GS_WRITE2:



   325 			i++;



   326 			if (i < cheatsNumber)



   327 			{



   328 				if (extended & 4)



   329 				{



   330 					CPUWriteByte(cheatsList[i-1].value, cheatsList[i].address);



   331 				}



   332 			}



   333 			break;



   334 		case GSA_16_BIT_GS_WRITE2:



   335 			i++;



   336 			if (i < cheatsNumber)



   337 			{



   338 				if (extended & 4)



   339 				{



   340 					CPUWriteHalfWord(cheatsList[i-1].value, cheatsList[i].address);



   341 				}



   342 			}



   343 			break;



   344 		case GSA_32_BIT_GS_WRITE2:



   345 			i++;



   346 			if (i < cheatsNumber)



   347 			{



   348 				if (extended & 4)



   349 				{



   350 					CPUWriteMemory(cheatsList[i-1].value, cheatsList[i].address);



   351 				}



   352 			}



   353 			break;



   354 		case GSA_16_BIT_ROM_PATCH2:



   355 			i++;



   356 			if (i < cheatsNumber)



   357 			{



   358 				if ((cheatsList[i-1].status & 1) == 0)



   359 				{



   360 					u32 addr = ((cheatsList[i-1].value & 0x00FFFFFF) << 1) + 0x8000000;



   361 					if (CPUReadHalfWord(addr) != (cheatsList[i].address & 0xFFFF))



   362 					{



   363 						cheatsList[i-1].oldValue = CPUReadHalfWord(addr);



   364 						cheatsList[i-1].status  |= 1;



   365 						CHEAT_PATCH_ROM_16BIT(addr, cheatsList[i].address & 0xFFFF);



   366 					}



   367 				}



   368 			}



   369 			break;



   370 		case GSA_8_BIT_SLIDE:



   371 			i++;



   372 			if (i < cheatsNumber)



   373 			{



   374 				u32 addr  = cheatsList[i-1].value;



   375 				u8  value = cheatsList[i].address;



   376 				int vinc  = (cheatsList[i].value >> 24) & 255;



   377 				int count = (cheatsList[i].value >> 16) & 255;



   378 				int ainc  = (cheatsList[i].value & 0xffff);



   379 				while (count > 0)



   380 				{



   381 					CPUWriteByte(addr, value);



   382 					value += vinc;



   383 					addr  += ainc;



   384 					count--;



   385 				}



   386 			}



   387 			break;



   388 		case GSA_16_BIT_SLIDE:



   389 			i++;



   390 			if (i < cheatsNumber)



   391 			{



   392 				u32 addr  = cheatsList[i-1].value;



   393 				u16 value = cheatsList[i].address;



   394 				int vinc  = (cheatsList[i].value >> 24) & 255;



   395 				int count = (cheatsList[i].value >> 16) & 255;



   396 				int ainc  = (cheatsList[i].value & 0xffff)*2;



   397 				while (count > 0)



   398 				{



   399 					CPUWriteHalfWord(addr, value);



   400 					value += vinc;



   401 					addr  += ainc;



   402 					count--;



   403 				}



   404 			}



   405 			break;



   406 		case GSA_32_BIT_SLIDE:



   407 			i++;



   408 			if (i < cheatsNumber)



   409 			{



   410 				u32 addr  = cheatsList[i-1].value;



   411 				u32 value = cheatsList[i].address;



   412 				int vinc  = (cheatsList[i].value >> 24) & 255;



   413 				int count = (cheatsList[i].value >> 16) & 255;



   414 				int ainc  = (cheatsList[i].value & 0xffff)*4;



   415 				while (count > 0)



   416 				{



   417 					CPUWriteMemory(addr, value);



   418 					value += vinc;



   419 					addr  += ainc;



   420 					count--;



   421 				}



   422 			}



   423 			break;



   424 		case GSA_8_BIT_IF_TRUE:



   425 			if (CPUReadByte(cheatsList[i].address) != cheatsList[i].value)



   426 			{



   427 				i++;



   428 			}



   429 			break;



   430 		case GSA_32_BIT_IF_TRUE:



   431 			if (CPUReadMemory(cheatsList[i].address) != cheatsList[i].value)



   432 			{



   433 				i++;



   434 			}



   435 			break;



   436 		case GSA_8_BIT_IF_FALSE:



   437 			if (CPUReadByte(cheatsList[i].address) == cheatsList[i].value)



   438 			{



   439 				i++;



   440 			}



   441 			break;



   442 		case GSA_32_BIT_IF_FALSE:



   443 			if (CPUReadMemory(cheatsList[i].address) == cheatsList[i].value)



   444 			{



   445 				i++;



   446 			}



   447 			break;



   448 		case GSA_8_BIT_FILL:



   449 		{



   450 			u32 addr = cheatsList[i].address;



   451 			u8  v    = cheatsList[i].value & 0xff;



   452 			u32 end  = addr + (cheatsList[i].value >> 8);



   453 			do



   454 			{



   455 				CPUWriteByte(addr, v);



   456 				addr++;



   457 			}



   458 			while (addr <= end);



   459 			break;



   460 		}



   461 		case GSA_16_BIT_FILL:



   462 		{



   463 			u32 addr = cheatsList[i].address;



   464 			u16 v    = cheatsList[i].value & 0xffff;



   465 			u32 end  = addr + ((cheatsList[i].value >> 16) << 1);



   466 			do



   467 			{



   468 				CPUWriteHalfWord(addr, v);



   469 				addr += 2;



   470 			}



   471 			while (addr <= end);



   472 			break;



   473 		}



   474 		case GSA_8_BIT_IF_TRUE2:



   475 			if (CPUReadByte(cheatsList[i].address) != cheatsList[i].value)



   476 			{



   477 				i += 2;



   478 			}



   479 			break;



   480 		case GSA_16_BIT_IF_TRUE2:



   481 			if (CPUReadHalfWord(cheatsList[i].address) != cheatsList[i].value)



   482 			{



   483 				i += 2;



   484 			}



   485 			break;



   486 		case GSA_32_BIT_IF_TRUE2:



   487 			if (CPUReadMemory(cheatsList[i].address) != cheatsList[i].value)



   488 			{



   489 				i += 2;



   490 			}



   491 			break;



   492 		case GSA_8_BIT_IF_FALSE2:



   493 			if (CPUReadByte(cheatsList[i].address) == cheatsList[i].value)



   494 			{



   495 				i += 2;



   496 			}



   497 			break;



   498 		case GSA_16_BIT_IF_FALSE2:



   499 			if (CPUReadHalfWord(cheatsList[i].address) == cheatsList[i].value)



   500 			{



   501 				i += 2;



   502 			}



   503 			break;



   504 		case GSA_32_BIT_IF_FALSE2:



   505 			if (CPUReadMemory(cheatsList[i].address) == cheatsList[i].value)



   506 			{



   507 				i += 2;



   508 			}



   509 			break;



   510 		case GSA_SLOWDOWN:



   511 			// check if button was pressed and released, if so toggle our state



   512 			if ((cheatsList[i].status & 4) && !(extended & 4))



   513 				cheatsList[i].status ^= 1;



   514 			if (extended & 4)



   515 				cheatsList[i].status |= 4;



   516 			else



   517 				cheatsList[i].status &= ~4;



   518 



   519 			if (cheatsList[i].status & 1)



   520 				ticks += 2*256*((cheatsList[i].value >> 8) & 255);



   521 			break;



   522 		case CBA_ADD:



   523 			CPUWriteHalfWord(cheatsList[i].address,



   524 			                 CPUReadHalfWord(cheatsList[i].address) +



   525 			                 (u16)cheatsList[i].value);



   526 			break;



   527 		case CBA_OR:



   528 			CPUWriteHalfWord(cheatsList[i].address,



   529 			                 CPUReadHalfWord(cheatsList[i].address) |



   530 			                 cheatsList[i].value);



   531 			break;



   532 		case CBA_LT:



   533 			if (CPUReadHalfWord(cheatsList[i].address) >= cheatsList[i].value)



   534 				i++;



   535 			break;



   536 		case CBA_GT:



   537 			if (CPUReadHalfWord(cheatsList[i].address) <= cheatsList[i].value)



   538 				i++;



   539 			break;



   540 		case CBA_SUPER:



   541 		{



   542 			int count   = 2*cheatsList[i].value;



   543 			u32 address = cheatsList[i].address;



   544 			for (int x = 0; x < count; x++)



   545 			{



   546 				u8  b;



   547 				int res = x % 6;



   548 				if (res < 4)



   549 					b = (cheatsList[i].address >> (24-8*res)) & 0xFF;



   550 				else



   551 					b = (cheatsList[i].value >> (8 - 8*(res-4))) & 0x0FF;



   552 				CPUWriteByte(address, b);



   553 				address++;



   554 				if (x && !res)



   555 					i++;



   556 			}



   557 			if (count % 6)



   558 				i++;



   559 			break;



   560 		}



   561 		}



   562 	}



   563 	return ticks;



   564 }



   565 



   566 void cheatsAdd(const char *codeStr,



   567                const char *desc,



   568                u32 address,



   569                u32 value,



   570                int code,



   571                int size)



   572 {



   573 	if (cheatsNumber < 100)



   574 	{



   575 		int x = cheatsNumber;



   576 		cheatsList[x].code    = code;



   577 		cheatsList[x].size    = size;



   578 		cheatsList[x].address = address;



   579 		cheatsList[x].value   = value;



   580 		strcpy(cheatsList[x].codestring, codeStr);



   581 		strcpy(cheatsList[x].desc, desc);



   582 		cheatsList[x].enabled = true;



   583 		cheatsList[x].status  = 0;



   584 



   585 		// we only store the old value for this simple codes. ROM patching



   586 		// is taken care when it actually patches the ROM



   587 		switch (cheatsList[x].size)



   588 		{



   589 		case INT_8_BIT_WRITE:



   590 			cheatsList[x].oldValue = CPUReadByte(address);



   591 			break;



   592 		case INT_16_BIT_WRITE:



   593 			cheatsList[x].oldValue = CPUReadHalfWord(address);



   594 			break;



   595 		case INT_32_BIT_WRITE:



   596 			cheatsList[x].oldValue = CPUReadMemory(address);



   597 			break;



   598 		}



   599 		cheatsNumber++;



   600 	}



   601 }



   602 



   603 void cheatsDelete(int number, bool restore)



   604 {



   605 	if (number < cheatsNumber && number >= 0)



   606 	{



   607 		int x = number;



   608 



   609 		if (restore)



   610 		{



   611 			switch (cheatsList[x].size)



   612 			{



   613 			case INT_8_BIT_WRITE:



   614 				CPUWriteByte(cheatsList[x].address, (u8)cheatsList[x].oldValue);



   615 				break;



   616 			case INT_16_BIT_WRITE:



   617 				CPUWriteHalfWord(cheatsList[x].address, (u16)cheatsList[x].oldValue);



   618 				break;



   619 			case INT_32_BIT_WRITE:



   620 				CPUWriteMemory(cheatsList[x].address, cheatsList[x].oldValue);



   621 				break;



   622 			case GSA_16_BIT_ROM_PATCH:



   623 				if (cheatsList[x].status & 1)



   624 				{



   625 					cheatsList[x].status &= ~1;



   626 					CHEAT_PATCH_ROM_16BIT(cheatsList[x].address,



   627 					                      cheatsList[x].oldValue);



   628 				}



   629 				break;



   630 			case GSA_16_BIT_ROM_PATCH2:



   631 				if (cheatsList[x].status & 1)



   632 				{



   633 					cheatsList[x].status &= ~1;



   634 					CHEAT_PATCH_ROM_16BIT(((cheatsList[x].value & 0x00FFFFFF) << 1)+



   635 					                      0x8000000,



   636 					                      cheatsList[x].oldValue);



   637 				}



   638 				break;



   639 			}



   640 		}



   641 		if ((x+1) <  cheatsNumber)



   642 		{



   643 			memcpy(&cheatsList[x], &cheatsList[x+1], sizeof(CheatsData)*



   644 			       (cheatsNumber-x-1));



   645 		}



   646 		cheatsNumber--;



   647 	}



   648 }



   649 



   650 void cheatsDeleteAll(bool restore)



   651 {



   652 	for (int i = cheatsNumber-1; i >= 0; i--)



   653 	{



   654 		cheatsDelete(i, restore);



   655 	}



   656 }



   657 



   658 void cheatsEnable(int i)



   659 {



   660 	if (i >= 0 && i < cheatsNumber)



   661 	{



   662 		cheatsList[i].enabled = true;



   663 	}



   664 }



   665 



   666 void cheatsDisable(int i)



   667 {



   668 	if (i >= 0 && i < cheatsNumber)



   669 	{



   670 		switch (cheatsList[i].size)



   671 		{



   672 		case GSA_16_BIT_ROM_PATCH:



   673 			if (cheatsList[i].status & 1)



   674 			{



   675 				cheatsList[i].status &= ~1;



   676 				CHEAT_PATCH_ROM_16BIT(cheatsList[i].address,



   677 				                      cheatsList[i].oldValue);



   678 			}



   679 			break;



   680 		case GSA_16_BIT_ROM_PATCH2:



   681 			if (cheatsList[i].status & 1)



   682 			{



   683 				cheatsList[i].status &= ~1;



   684 				CHEAT_PATCH_ROM_16BIT(((cheatsList[i].value & 0x00FFFFFF) << 1)+



   685 				                      0x8000000,



   686 				                      cheatsList[i].oldValue);



   687 			}



   688 			break;



   689 		}



   690 		cheatsList[i].enabled = false;



   691 	}



   692 }



   693 



   694 bool cheatsVerifyCheatCode(const char *code, const char *desc)



   695 {



   696 	int len = strlen(code);



   697 	if (len != 11 && len != 13 && len != 17)



   698 	{



   699 		systemMessage(MSG_INVALID_CHEAT_CODE, N_("Invalid cheat code '%s'"), code);



   700 		return false;



   701 	}



   702 



   703 	if (code[8] != ':')



   704 	{



   705 		systemMessage(MSG_INVALID_CHEAT_CODE, N_("Invalid cheat code '%s'"), code);



   706 		return false;



   707 	}



   708 



   709 	int i;



   710 	for (i = 0; i < 8; i++)



   711 	{



   712 		if (!CHEAT_IS_HEX(code[i]))



   713 		{



   714 			// wrong cheat



   715 			systemMessage(MSG_INVALID_CHEAT_CODE,



   716 			              N_("Invalid cheat code '%s'"), code);



   717 			return false;



   718 		}



   719 	}



   720 	for (i = 9; i < len; i++)



   721 	{



   722 		if (!CHEAT_IS_HEX(code[i]))



   723 		{



   724 			// wrong cheat



   725 			systemMessage(MSG_INVALID_CHEAT_CODE,



   726 			              N_("Invalid cheat code '%s'"), code);



   727 			return false;



   728 		}



   729 	}



   730 



   731 	u32 address = 0;



   732 	u32 value   = 0;



   733 



   734 	char buffer[10];



   735 	strncpy(buffer, code, 8);



   736 	buffer[8] = 0;



   737 	sscanf(buffer, "%x", &address);



   738 



   739 	switch (address >> 24)



   740 	{



   741 	case 2:



   742 	case 3:



   743 		break;



   744 	default:



   745 		systemMessage(MSG_INVALID_CHEAT_CODE_ADDRESS,



   746 		              N_("Invalid cheat code address: %08x"),



   747 		              address);



   748 		return false;



   749 	}



   750 



   751 	strncpy(buffer, &code[9], 8);



   752 	sscanf(buffer, "%x", &value);



   753 	int type = 0;



   754 	if (len == 13)



   755 		type = 1;



   756 	if (len == 17)



   757 		type = 2;



   758 	cheatsAdd(code, desc, address, value, type, type);



   759 	return true;



   760 }



   761 



   762 void cheatsAddCheatCode(const char *code, const char *desc)



   763 {



   764 	cheatsVerifyCheatCode(code, desc);



   765 }



   766 



   767 void cheatsDecryptGSACode(u32& address, u32& value, bool v3)



   768 {



   769 	u32  rollingseed = 0xC6EF3720;



   770 	u32  seeds_v1[]  =  { 0x09F4FBBD, 0x9681884A, 0x352027E9, 0xF3DEE5A7 };



   771 	u32  seeds_v3[]  = { 0x7AA9648F, 0x7FAE6994, 0xC0EFAAD5, 0x42712C57 };



   772 	u32 *seeds       = v3 ? seeds_v3 : seeds_v1;



   773 



   774 	int bitsleft = 32;



   775 	while (bitsleft > 0)



   776 	{



   777 		value -= ((((address << 4) + seeds[2]) ^ (address + rollingseed)) ^



   778 		          ((address >> 5) + seeds[3]));



   779 		address -= ((((value << 4) + seeds[0]) ^ (value + rollingseed)) ^



   780 		            ((value >> 5) + seeds[1]));



   781 		rollingseed -= 0x9E3779B9;



   782 		bitsleft--;



   783 	}



   784 }



   785 



   786 void cheatsAddGSACode(const char *code, const char *desc, bool v3)



   787 {



   788 	if (strlen(code) != 16)



   789 	{



   790 		// wrong cheat



   791 		systemMessage(MSG_INVALID_GSA_CODE,



   792 		              N_("Invalid GSA code. Format is XXXXXXXXYYYYYYYY"));



   793 		return;



   794 	}



   795 



   796 	int i;



   797 	for (i = 0; i < 16; i++)



   798 	{



   799 		if (!CHEAT_IS_HEX(code[i]))



   800 		{



   801 			// wrong cheat



   802 			systemMessage(MSG_INVALID_GSA_CODE,



   803 			              N_("Invalid GSA code. Format is XXXXXXXXYYYYYYYY"));



   804 			return;



   805 		}



   806 	}



   807 



   808 	char buffer[10];



   809 	strncpy(buffer, code, 8);



   810 	buffer[8] = 0;



   811 	u32 address;



   812 	sscanf(buffer, "%x", &address);



   813 	strncpy(buffer, &code[8], 8);



   814 	buffer[8] = 0;



   815 	u32 value;



   816 	sscanf(buffer, "%x", &value);



   817 



   818 	cheatsDecryptGSACode(address, value, v3);



   819 



   820 	if (value == 0x1DC0DE)



   821 	{



   822 		u32 gamecode = READ32LE(((u32 *)&rom[0xac]));



   823 		if (gamecode != address)



   824 		{



   825 			char buffer[5];



   826 			*((u32 *)buffer) = address;



   827 			buffer[4]        = 0;



   828 			char buffer2[5];



   829 			*((u32 *)buffer2) = READ32LE(((u32 *)&rom[0xac]));



   830 			buffer2[4]        = 0;



   831 			systemMessage(MSG_GBA_CODE_WARNING,



   832 			              N_("Warning: cheats are for game %s. Current game is %s.\nCodes may not work correctly."),



   833 			              buffer, buffer2);



   834 		}



   835 		cheatsAdd(code, desc, address & 0x0FFFFFFF, value, v3 ? 257 : 256,



   836 		          UNKNOWN_CODE);



   837 		return;



   838 	}



   839 	if (isMultilineWithData(cheatsNumber-1))



   840 	{



   841 		cheatsAdd(code, desc, address, value, v3 ? 257 : 256, UNKNOWN_CODE);



   842 		return;



   843 	}



   844 	if (v3)



   845 	{



   846 		int type = (address >> 25) & 127;



   847 		u32 addr = (address & 0x00F00000) << 4 | (address & 0x0003FFFF);



   848 		switch (type)



   849 		{



   850 		case 0x00:



   851 			if (address == 0)



   852 			{



   853 				type = (value >> 25) & 127;



   854 				addr = (value & 0x00F00000) << 4 | (value & 0x0003FFFF);



   855 				switch (type)



   856 				{



   857 				case 0x04:



   858 					cheatsAdd(code, desc, 0, value & 0x00FFFFFF, 257, GSA_SLOWDOWN);



   859 					break;



   860 				case 0x08:



   861 					cheatsAdd(code, desc, 0, addr, 257, GSA_8_BIT_GS_WRITE2);



   862 					break;



   863 				case 0x09:



   864 					cheatsAdd(code, desc, 0, addr, 257, GSA_16_BIT_GS_WRITE2);



   865 					break;



   866 				case 0x0a:



   867 					cheatsAdd(code, desc, 0, addr, 257, GSA_32_BIT_GS_WRITE2);



   868 					break;



   869 				case 0x0c:



   870 				case 0x0d:



   871 				case 0x0e:



   872 				case 0x0f:



   873 					cheatsAdd(code, desc, 0, value & 0x00FFFFFF, 257, GSA_16_BIT_ROM_PATCH2);



   874 					break;



   875 				case 0x40:



   876 					cheatsAdd(code, desc, 0, addr, 257, GSA_8_BIT_SLIDE);



   877 					break;



   878 				case 0x41:



   879 					cheatsAdd(code, desc, 0, addr, 257, GSA_16_BIT_SLIDE);



   880 					break;



   881 				case 0x42:



   882 					cheatsAdd(code, desc, 0, addr, 257, GSA_32_BIT_SLIDE);



   883 					break;



   884 				default:



   885 					cheatsAdd(code, desc, address, value, 257, UNKNOWN_CODE);



   886 					break;



   887 				}



   888 			}



   889 			else



   890 				cheatsAdd(code, desc, addr, value, 257, GSA_8_BIT_FILL);



   891 			break;



   892 		case 0x01:



   893 			cheatsAdd(code, desc, addr, value, 257, GSA_16_BIT_FILL);



   894 			break;



   895 		case 0x02:



   896 			cheatsAdd(code, desc, addr, value, 257, INT_32_BIT_WRITE);



   897 			break;



   898 		case 0x04:



   899 			cheatsAdd(code, desc, addr, value, 257, GSA_8_BIT_IF_TRUE);



   900 			break;



   901 		case 0x05:



   902 			cheatsAdd(code, desc, addr, value, 257, CBA_IF_TRUE);



   903 			break;



   904 		case 0x06:



   905 			cheatsAdd(code, desc, addr, value, 257, GSA_32_BIT_IF_TRUE);



   906 			break;



   907 		case 0x08:



   908 			cheatsAdd(code, desc, addr, value, 257, GSA_8_BIT_IF_FALSE);



   909 			break;



   910 		case 0x09:



   911 			cheatsAdd(code, desc, addr, value, 257, CBA_IF_FALSE);



   912 			break;



   913 		case 0x0a:



   914 			cheatsAdd(code, desc, addr, value, 257, GSA_32_BIT_IF_FALSE);



   915 			break;



   916 		case 0x24:



   917 			cheatsAdd(code, desc, addr, value, 257, GSA_8_BIT_IF_TRUE2);



   918 			break;



   919 		case 0x25:



   920 			cheatsAdd(code, desc, addr, value, 257, GSA_16_BIT_IF_TRUE2);



   921 			break;



   922 		case 0x26:



   923 			cheatsAdd(code, desc, addr, value, 257, GSA_32_BIT_IF_TRUE2);



   924 			break;



   925 		case 0x28:



   926 			cheatsAdd(code, desc, addr, value, 257, GSA_8_BIT_IF_FALSE2);



   927 			break;



   928 		case 0x29:



   929 			cheatsAdd(code, desc, addr, value, 257, GSA_16_BIT_IF_FALSE2);



   930 			break;



   931 		case 0x2a:



   932 			cheatsAdd(code, desc, addr, value, 257, GSA_32_BIT_IF_FALSE2);



   933 			break;



   934 		default:



   935 			cheatsAdd(code, desc, address, value, 257, UNKNOWN_CODE);



   936 			break;



   937 		}



   938 	}



   939 	else



   940 	{



   941 		int type = (address >> 28) & 15;



   942 		switch (type)



   943 		{



   944 		case 0:



   945 		case 1:



   946 		case 2:



   947 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 256, type);



   948 			break;



   949 		case 6:



   950 			address <<= 1;



   951 			type      = (address >> 28) & 15;



   952 			if (type == 0x0c)



   953 			{



   954 				cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 256,



   955 				          GSA_16_BIT_ROM_PATCH);



   956 				break;



   957 			}



   958 			// unsupported code



   959 			cheatsAdd(code, desc, address, value, 256,



   960 			          UNKNOWN_CODE);



   961 			break;



   962 		case 8:



   963 			switch ((address >> 20) & 15)



   964 			{



   965 			case 1:



   966 				cheatsAdd(code, desc, address & 0x0F0FFFFF, value, 256,



   967 				          GSA_8_BIT_GS_WRITE);



   968 				break;



   969 			case 2:



   970 				cheatsAdd(code, desc, address & 0x0F0FFFFF, value, 256,



   971 				          GSA_16_BIT_GS_WRITE);



   972 				break;



   973 			case 3:



   974 				cheatsAdd(code, desc, address & 0x0F0FFFFF, value, 256,



   975 				          GSA_32_BIT_GS_WRITE);



   976 			case 15:



   977 				cheatsAdd(code, desc, 0, value & 0xFF00, 256, GSA_SLOWDOWN);



   978 				break;



   979 			default:



   980 				// unsupported code



   981 				cheatsAdd(code, desc, address, value, 256,



   982 				          UNKNOWN_CODE);



   983 				break;



   984 			}



   985 			break;



   986 		case 0x0d:



   987 			if (address != 0xDEADFACE)



   988 			{



   989 				cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 256,



   990 				          CBA_IF_TRUE);



   991 			}



   992 			else



   993 				cheatsAdd(code, desc, address, value, 256,



   994 				          UNKNOWN_CODE);



   995 			break;



   996 		default:



   997 			// unsupported code



   998 			cheatsAdd(code, desc, address, value, 256,



   999 			          UNKNOWN_CODE);



  1000 			break;



  1001 		}



  1002 	}



  1003 }



  1004 



  1005 bool cheatsImportGSACodeFile(const char *name, int game, bool v3)



  1006 {



  1007 	FILE *f = fopen(name, "rb");



  1008 	if (!f)



  1009 		return false;



  1010 



  1011 	int games = 0;



  1012 	int len   = 0;



  1013 	fseek(f, 0x1e, SEEK_CUR);



  1014 	fread(&games, 1, 4, f);



  1015 	bool found = false;



  1016 	int  g     = 0;



  1017 	while (games > 0)



  1018 	{



  1019 		if (g == game)



  1020 		{



  1021 			found = true;



  1022 			break;



  1023 		}



  1024 		fread(&len, 1, 4, f);



  1025 		fseek(f, len, SEEK_CUR);



  1026 		int codes = 0;



  1027 		fread(&codes, 1, 4, f);



  1028 		while (codes > 0)



  1029 		{



  1030 			fread(&len, 1, 4, f);



  1031 			fseek(f, len, SEEK_CUR);



  1032 			fseek(f, 8, SEEK_CUR);



  1033 			fread(&len, 1, 4, f);



  1034 			fseek(f, len*12, SEEK_CUR);



  1035 			codes--;



  1036 		}



  1037 		games--;



  1038 		g++;



  1039 	}



  1040 	if (found)



  1041 	{



  1042 		char desc[256];



  1043 		char code[17];



  1044 		fread(&len, 1, 4, f);



  1045 		fseek(f, len, SEEK_CUR);



  1046 		int codes = 0;



  1047 		fread(&codes, 1, 4, f);



  1048 		while (codes > 0)



  1049 		{



  1050 			fread(&len, 1, 4, f);



  1051 			fread(desc, 1, len, f);



  1052 			desc[len] = 0;



  1053 			desc[31]  = 0;



  1054 			fread(&len, 1, 4, f);



  1055 			fseek(f, len, SEEK_CUR);



  1056 			fseek(f, 4, SEEK_CUR);



  1057 			fread(&len, 1, 4, f);



  1058 			while (len)



  1059 			{



  1060 				fseek(f, 4, SEEK_CUR);



  1061 				fread(code, 1, 8, f);



  1062 				fseek(f, 4, SEEK_CUR);



  1063 				fread(&code[8], 1, 8, f);



  1064 				code[16] = 0;



  1065 				cheatsAddGSACode(code, desc, v3);



  1066 				len -= 2;



  1067 			}



  1068 			codes--;



  1069 		}



  1070 	}



  1071 	fclose(f);



  1072 	return false;



  1073 }



  1074 



  1075 void cheatsCBAReverseArray(u8 *array, u8 *dest)



  1076 {



  1077 	dest[0] = array[3];



  1078 	dest[1] = array[2];



  1079 	dest[2] = array[1];



  1080 	dest[3] = array[0];



  1081 	dest[4] = array[5];



  1082 	dest[5] = array[4];



  1083 }



  1084 



  1085 void chatsCBAScramble(u8 *array, int count, u8 b)



  1086 {



  1087 	u8 *x  = array + (count >> 3);



  1088 	u8 *y  = array + (b >> 3);



  1089 	u32 z  = *x & (1 << (count & 7));



  1090 	u32 x0 = (*x & (~(1 << (count & 7))));



  1091 	if (z != 0)



  1092 		z = 1;



  1093 	if ((*y & (1 << (b & 7))) != 0)



  1094 		x0 |= (1 << (count & 7));



  1095 	*x = x0;



  1096 	u32 temp = *y & (~(1 << (b & 7)));



  1097 	if (z != 0)



  1098 		temp |= (1 << (b & 7));



  1099 	*y = temp;



  1100 }



  1101 



  1102 u32 cheatsCBAGetValue(u8 *array)



  1103 {



  1104 	return array[0] | array[1]<<8 | array[2] << 16 | array[3]<<24;



  1105 }



  1106 



  1107 u16 cheatsCBAGetData(u8 *array)



  1108 {



  1109 	return array[4] | array[5]<<8;



  1110 }



  1111 



  1112 void cheatsCBAArrayToValue(u8 *array, u8 *dest)



  1113 {



  1114 	dest[0] = array[3];



  1115 	dest[1] = array[2];



  1116 	dest[2] = array[1];



  1117 	dest[3] = array[0];



  1118 	dest[4] = array[5];



  1119 	dest[5] = array[4];



  1120 }



  1121 



  1122 void cheatsCBAParseSeedCode(u32 address, u32 value, u32 *array)



  1123 {



  1124 	array[0] = 1;



  1125 	array[1] = value & 0xFF;



  1126 	array[2] = (address >> 0x10) & 0xFF;



  1127 	array[3] = (value >> 8) & 0xFF;



  1128 	array[4] = (address >> 0x18) & 0x0F;



  1129 	array[5] = address & 0xFFFF;



  1130 	array[6] = address;



  1131 	array[7] = value;



  1132 }



  1133 



  1134 u32 cheatsCBAEncWorker()



  1135 {



  1136 	u32 x = (cheatsCBATemporaryValue * 0x41c64e6d) + 0x3039;



  1137 	u32 y = (x * 0x41c64e6d) + 0x3039;



  1138 	u32 z = x >> 0x10;



  1139 	x = ((y >> 0x10) & 0x7fff) << 0x0f;



  1140 	z = (z << 0x1e) | x;



  1141 	x = (y * 0x41c64e6d) + 0x3039;



  1142 	cheatsCBATemporaryValue = x;



  1143 	return z | ((x >> 0x10) & 0x7fff);



  1144 }



  1145 



  1146 #define ROR(v, s) \



  1147     (((v) >> (s)) | (((v) & ((1 << (s))-1)) << (32 - (s))))



  1148 



  1149 u32 cheatsCBACalcIndex(u32 x, u32 y)



  1150 {



  1151 	if (y != 0)



  1152 	{



  1153 		if (y == 1)



  1154 			x = 0;



  1155 		else if (x == y)



  1156 			x = 0;



  1157 		if (y < 1)



  1158 			return x;



  1159 		else if (x < y)



  1160 			return x;



  1161 		u32 x0 = 1;



  1162 



  1163 		while (y < 0x10000000)



  1164 		{



  1165 			if (y < x)



  1166 			{



  1167 				y  = y << 4;



  1168 				x0 = x0 << 4;



  1169 			}



  1170 			else



  1171 				break;



  1172 		}



  1173 



  1174 		while (y < 0x80000000)



  1175 		{



  1176 			if (y < x)



  1177 			{



  1178 				y  = y << 1;



  1179 				x0 = x0 << 1;



  1180 			}



  1181 			else



  1182 				break;



  1183 		}



  1184 



  1185 loop:



  1186 		u32 z = 0;



  1187 		if (x >= y)



  1188 			x -= y;



  1189 		if (x >= (y >> 1))



  1190 		{



  1191 			x -= (y >> 1);



  1192 			z |= ROR(x0, 1);



  1193 		}



  1194 		if (x >= (y >> 2))



  1195 		{



  1196 			x -= (y >> 2);



  1197 			z |= ROR(x0, 2);



  1198 		}



  1199 		if (x >= (y >> 3))



  1200 		{



  1201 			x -= (y >> 3);



  1202 			z |= ROR(x0, 3);



  1203 		}



  1204 



  1205 		u32 temp = x0;



  1206 



  1207 		if (x != 0)



  1208 		{



  1209 			x0 = x0 >> 4;



  1210 			if (x0 != 0)



  1211 			{



  1212 				y = y >> 4;



  1213 				goto loop;



  1214 			}



  1215 		}



  1216 



  1217 		z = z & 0xe0000000;



  1218 



  1219 		if (z != 0)



  1220 		{



  1221 			if ((temp & 7) == 0)



  1222 				return x;



  1223 		}



  1224 		else



  1225 			return x;



  1226 



  1227 		if ((z & ROR(temp, 3)) != 0)



  1228 			x += y >> 3;



  1229 		if ((z & ROR(temp, 2)) != 0)



  1230 			x += y >> 2;



  1231 		if ((z & ROR(temp, 1)) != 0)



  1232 			x += y >> 1;



  1233 		return x;



  1234 	}



  1235 	else



  1236 	{}



  1237 	// should not happen in the current code



  1238 	return 0;



  1239 }



  1240 



  1241 void cheatsCBAUpdateSeedBuffer(u32 a, u8 *buffer, int count)



  1242 {



  1243 	int i;



  1244 	for (i = 0; i < count; i++)



  1245 		buffer[i] = i;



  1246 	for (i = 0; (u32)i < a; i++)



  1247 	{



  1248 		u32 a = cheatsCBACalcIndex(cheatsCBAEncWorker(), count);



  1249 		u32 b = cheatsCBACalcIndex(cheatsCBAEncWorker(), count);



  1250 		u32 t = buffer[a];



  1251 		buffer[a] = buffer[b];



  1252 		buffer[b] = t;



  1253 	}



  1254 }



  1255 



  1256 void cheatsCBAChangeEncryption(u32 *seed)



  1257 {



  1258 	int i;



  1259 



  1260 	cheatsCBATemporaryValue = (seed[1] ^ 0x1111);



  1261 	cheatsCBAUpdateSeedBuffer(0x50, cheatsCBASeedBuffer, 0x30);



  1262 	cheatsCBATemporaryValue = 0x4efad1c3;



  1263 



  1264 	for (i = 0; (u32)i < seed[4]; i++)



  1265 	{



  1266 		cheatsCBATemporaryValue = cheatsCBAEncWorker();



  1267 	}



  1268 	cheatsCBASeed[2] = cheatsCBAEncWorker();



  1269 	cheatsCBASeed[3] = cheatsCBAEncWorker();



  1270 



  1271 	cheatsCBATemporaryValue = seed[3] ^ 0xf254;



  1272 



  1273 	for (i = 0; (u32)i < seed[3]; i++)



  1274 	{



  1275 		cheatsCBATemporaryValue = cheatsCBAEncWorker();



  1276 	}



  1277 



  1278 	cheatsCBASeed[0] = cheatsCBAEncWorker();



  1279 	cheatsCBASeed[1] = cheatsCBAEncWorker();



  1280 



  1281 	*((u32 *)&cheatsCBACurrentSeed[0]) = seed[6];



  1282 	*((u32 *)&cheatsCBACurrentSeed[4]) = seed[7];



  1283 	*((u32 *)&cheatsCBACurrentSeed[8]) = 0;



  1284 }



  1285 



  1286 u16 cheatsCBAGenValue(u32 x, u32 y, u32 z)



  1287 {



  1288 	y <<= 0x10;



  1289 	z <<= 0x10;



  1290 	x <<= 0x18;



  1291 	u32 x0 = (int)y >> 0x10;



  1292 	z = (int)z >> 0x10;



  1293 	x = (int)x >> 0x10;



  1294 	for (int i = 0; i < 8; i++)



  1295 	{



  1296 		u32 temp = z ^ x;



  1297 		if ((int)temp >= 0)



  1298 		{



  1299 			temp = z << 0x11;



  1300 		}



  1301 		else



  1302 		{



  1303 			temp  = z << 0x01;



  1304 			temp ^= x0;



  1305 			temp  = temp << 0x10;



  1306 		}



  1307 		z    = (int)temp >> 0x10;



  1308 		temp = x << 0x11;



  1309 		x    = (int)temp >> 0x10;



  1310 	}



  1311 	return z & 0xffff;



  1312 }



  1313 



  1314 void cheatsCBAGenTable()



  1315 {



  1316 	for (int i = 0; i < 0x100; i++)



  1317 	{



  1318 		cheatsCBATable[i] = cheatsCBAGenValue(i, 0x1021, 0);



  1319 	}



  1320 	cheatsCBATableGenerated = true;



  1321 }



  1322 



  1323 u16 cheatsCBACalcCRC(u8 *rom, int count)



  1324 {



  1325 	u32 crc = 0xffffffff;



  1326 



  1327 	if (count & 3)



  1328 	{



  1329 		// 0x08000EAE



  1330 	}



  1331 	else



  1332 	{



  1333 		count = (count >> 2) - 1;



  1334 		if (count != -1)



  1335 		{



  1336 			while (count != -1)



  1337 			{



  1338 				crc = (((crc << 0x08) ^ cheatsCBATable[(((u32)crc << 0x10) >> 0x18)



  1339 				                                       ^ *rom++]) << 0x10) >> 0x10;



  1340 				crc = (((crc << 0x08) ^ cheatsCBATable[(((u32)crc << 0x10) >> 0x18)



  1341 				                                       ^ *rom++]) << 0x10) >> 0x10;



  1342 				crc = (((crc << 0x08) ^ cheatsCBATable[(((u32)crc << 0x10) >> 0x18)



  1343 				                                       ^ *rom++]) << 0x10) >> 0x10;



  1344 				crc = (((crc << 0x08) ^ cheatsCBATable[(((u32)crc << 0x10) >> 0x18)



  1345 				                                       ^ *rom++]) << 0x10) >> 0x10;



  1346 				count--;



  1347 			}



  1348 		}



  1349 	}



  1350 	return crc & 0xffff;



  1351 }



  1352 



  1353 void cheatsCBADecrypt(u8 *decrypt)



  1354 {



  1355 	u8  buffer[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };



  1356 	u8 *array     = &buffer[1];



  1357 



  1358 	cheatsCBAReverseArray(decrypt, array);



  1359 



  1360 	for (int count = 0x2f; count >= 0; count--)



  1361 	{



  1362 		chatsCBAScramble(array, count, cheatsCBASeedBuffer[count]);



  1363 	}



  1364 	cheatsCBAArrayToValue(array, decrypt);



  1365 	*((u32 *)decrypt) = cheatsCBAGetValue(decrypt) ^



  1366 	                    cheatsCBASeed[0];



  1367 	*((u16 *)(decrypt+4)) = (cheatsCBAGetData(decrypt) ^



  1368 	                         cheatsCBASeed[1]) & 0xffff;



  1369 



  1370 	cheatsCBAReverseArray(decrypt, array);



  1371 



  1372 	u32 cs = cheatsCBAGetValue(cheatsCBACurrentSeed);



  1373 	for (int i = 0; i <= 4; i++)



  1374 	{



  1375 		array[i] = ((cs >> 8) ^ array[i+1]) ^ array[i] ;



  1376 	}



  1377 



  1378 	array[5] = (cs >> 8) ^ array[5];



  1379 



  1380 	for (int j = 5; j >= 0; j--)



  1381 	{



  1382 		array[j] = (cs ^ array[j-1]) ^ array[j];



  1383 	}



  1384 



  1385 	cheatsCBAArrayToValue(array, decrypt);



  1386 



  1387 	*((u32 *)decrypt) = cheatsCBAGetValue(decrypt)



  1388 	                    ^ cheatsCBASeed[2];



  1389 	*((u16 *)(decrypt+4)) = (cheatsCBAGetData(decrypt)



  1390 	                         ^ cheatsCBASeed[3]) & 0xffff;



  1391 }



  1392 



  1393 int cheatsCBAGetCount()



  1394 {



  1395 	int count = 0;



  1396 	for (int i = 0; i < cheatsNumber; i++)



  1397 	{



  1398 		if (cheatsList[i].code == 512)



  1399 			count++;



  1400 	}



  1401 	return count;



  1402 }



  1403 



  1404 bool cheatsCBAShouldDecrypt()



  1405 {



  1406 	for (int i = 0; i < cheatsNumber; i++)



  1407 	{



  1408 		if (cheatsList[i].code == 512)



  1409 		{



  1410 			return (cheatsList[i].codestring[0] == '9');



  1411 		}



  1412 	}



  1413 	return false;



  1414 }



  1415 



  1416 void cheatsAddCBACode(const char *code, const char *desc)



  1417 {



  1418 	if (strlen(code) != 13)



  1419 	{



  1420 		// wrong cheat



  1421 		systemMessage(MSG_INVALID_CBA_CODE,



  1422 		              N_("Invalid CBA code. Format is XXXXXXXX YYYY."));



  1423 		return;



  1424 	}



  1425 



  1426 	int i;



  1427 	for (i = 0; i < 8; i++)



  1428 	{



  1429 		if (!CHEAT_IS_HEX(code[i]))



  1430 		{



  1431 			// wrong cheat



  1432 			systemMessage(MSG_INVALID_CBA_CODE,



  1433 			              N_("Invalid CBA code. Format is XXXXXXXX YYYY."));



  1434 			return;



  1435 		}



  1436 	}



  1437 



  1438 	if (code[8] != ' ')



  1439 	{



  1440 		systemMessage(MSG_INVALID_CBA_CODE,



  1441 		              N_("Invalid CBA code. Format is XXXXXXXX YYYY."));



  1442 		return;



  1443 	}



  1444 



  1445 	for (i = 9; i < 13; i++)



  1446 	{



  1447 		if (!CHEAT_IS_HEX(code[i]))



  1448 		{



  1449 			// wrong cheat



  1450 			systemMessage(MSG_INVALID_CBA_CODE,



  1451 			              N_("Invalid CBA code. Format is XXXXXXXX YYYY."));



  1452 			return;



  1453 		}



  1454 	}



  1455 



  1456 	char buffer[10];



  1457 	strncpy(buffer, code, 8);



  1458 	buffer[8] = 0;



  1459 	u32 address;



  1460 	sscanf(buffer, "%x", &address);



  1461 	strncpy(buffer, &code[9], 4);



  1462 	buffer[4] = 0;



  1463 	u32 value;



  1464 	sscanf(buffer, "%x", &value);



  1465 



  1466 	u8 array[8] = {



  1467 		address &255,



  1468 		(address >> 8) & 255,



  1469 		(address >> 16) & 255,



  1470 		(address >> 24) & 255,



  1471 		(value & 255),



  1472 		(value >> 8) & 255,



  1473 		0,



  1474 		0



  1475 	};



  1476 



  1477 	if (cheatsCBAGetCount() == 0 &&



  1478 	    (address >> 28) == 9)



  1479 	{



  1480 		u32 seed[8];



  1481 		cheatsCBAParseSeedCode(address, value, seed);



  1482 		cheatsCBAChangeEncryption(seed);



  1483 		cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512, UNKNOWN_CODE);



  1484 	}



  1485 	else



  1486 	{



  1487 		if (cheatsCBAShouldDecrypt())



  1488 			cheatsCBADecrypt(array);



  1489 



  1490 		address = READ32LE(((u32 *)array));



  1491 		value   = READ16LE(((u16 *)&array[4]));



  1492 



  1493 		int type = (address >> 28) & 15;



  1494 



  1495 		if (isMultilineWithData(cheatsNumber-1))



  1496 		{



  1497 			cheatsAdd(code, desc, address, value, 512, UNKNOWN_CODE);



  1498 			return;



  1499 		}



  1500 



  1501 		switch (type)



  1502 		{



  1503 		case 0x00:



  1504 		{



  1505 			if (!cheatsCBATableGenerated)



  1506 				cheatsCBAGenTable();



  1507 			u32 crc = cheatsCBACalcCRC(rom, 0x10000);



  1508 			if (crc != address)



  1509 			{



  1510 				systemMessage(MSG_CBA_CODE_WARNING,



  1511 				              N_("Warning: Codes seem to be for a different game.\nCodes may not work correctly."));



  1512 			}



  1513 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1514 			          UNKNOWN_CODE);



  1515 			break;



  1516 		}



  1517 		case 0x02:



  1518 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1519 			          CBA_OR);



  1520 			break;



  1521 		case 0x03:



  1522 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1523 			          INT_8_BIT_WRITE);



  1524 			break;



  1525 		case 0x04:



  1526 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1527 			          CBA_SLIDE_CODE);



  1528 			break;



  1529 		case 0x05:



  1530 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1531 			          CBA_SUPER);



  1532 			break;



  1533 		case 0x06:



  1534 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1535 			          CBA_AND);



  1536 			break;



  1537 		case 0x07:



  1538 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1539 			          CBA_IF_TRUE);



  1540 			break;



  1541 		case 0x08:



  1542 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1543 			          INT_16_BIT_WRITE);



  1544 			break;



  1545 		case 0x0a:



  1546 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1547 			          CBA_IF_FALSE);



  1548 			break;



  1549 		case 0x0b:



  1550 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1551 			          CBA_LT);



  1552 			break;



  1553 		case 0x0c:



  1554 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1555 			          CBA_GT);



  1556 			break;



  1557 		case 0x0d:



  1558 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1559 			          CBA_IF_KEYS_PRESSED);



  1560 			break;



  1561 		case 0x0e:



  1562 			cheatsAdd(code, desc, address & 0x0FFFFFFF, value, 512,



  1563 			          CBA_ADD);



  1564 			break;



  1565 		default:



  1566 			// unsupported code



  1567 			cheatsAdd(code, desc, address & 0xFFFFFFFF, value, 512,



  1568 			          UNKNOWN_CODE);



  1569 			break;



  1570 		}



  1571 	}



  1572 }



  1573 



  1574 void cheatsSaveGame(gzFile file)



  1575 {



  1576 	utilWriteInt(file, cheatsNumber);



  1577 



  1578 	utilGzWrite(file, cheatsList, sizeof(cheatsList));



  1579 }



  1580 



  1581 void cheatsReadGame(gzFile file)



  1582 {



  1583 	cheatsNumber = 0;



  1584 



  1585 	cheatsNumber = utilReadInt(file);



  1586 



  1587 	utilGzRead(file, cheatsList, sizeof(cheatsList));



  1588 



  1589 	bool firstCodeBreaker = true;



  1590 



  1591 	for (int i = 0; i < cheatsNumber; i++)



  1592 	{



  1593 		cheatsList[i].status = 0;



  1594 		if (!cheatsList[i].codestring[0])



  1595 		{



  1596 			switch (cheatsList[i].size)



  1597 			{



  1598 			case 0:



  1599 				sprintf(cheatsList[i].codestring, "%08x:%02x", cheatsList[i].address,



  1600 				        cheatsList[i].value);



  1601 				break;



  1602 			case 1:



  1603 				sprintf(cheatsList[i].codestring, "%08x:%04x", cheatsList[i].address,



  1604 				        cheatsList[i].value);



  1605 				break;



  1606 			case 2:



  1607 				sprintf(cheatsList[i].codestring, "%08x:%08x", cheatsList[i].address,



  1608 				        cheatsList[i].value);



  1609 				break;



  1610 			}



  1611 		}



  1612 



  1613 		if (cheatsList[i].enabled)



  1614 		{



  1615 			cheatsEnable(i);



  1616 		}



  1617 



  1618 		if (cheatsList[i].code == 512 && firstCodeBreaker)



  1619 		{



  1620 			firstCodeBreaker = false;



  1621 			char buffer[10];



  1622 			strncpy(buffer, cheatsList[i].codestring, 8);



  1623 			buffer[8] = 0;



  1624 			u32 address;



  1625 			sscanf(buffer, "%x", &address);



  1626 			if ((address >> 28) == 9)



  1627 			{



  1628 				strncpy(buffer, &cheatsList[i].codestring[9], 4);



  1629 				buffer[4] = 0;



  1630 				u32 value;



  1631 				sscanf(buffer, "%x", &value);



  1632 



  1633 				u32 seed[8];



  1634 				cheatsCBAParseSeedCode(address, value, seed);



  1635 				cheatsCBAChangeEncryption(seed);



  1636 			}



  1637 		}



  1638 	}



  1639 }



  1640 



  1641 void cheatsSaveCheatList(const char *file)



  1642 {



  1643 	if (cheatsNumber == 0)



  1644 		return;



  1645 	FILE *f = fopen(file, "wb");



  1646 	if (f == NULL)



  1647 		return;



  1648 	int version = 1;



  1649 	fwrite(&version, 1, sizeof(version), f);



  1650 	int type = 0;



  1651 	fwrite(&type, 1, sizeof(type), f);



  1652 	fwrite(&cheatsNumber, 1, sizeof(cheatsNumber), f);



  1653 	fwrite(cheatsList, 1, sizeof(cheatsList), f);



  1654 	fclose(f);



  1655 }



  1656 



  1657 bool cheatsLoadCheatList(const char *file)



  1658 {



  1659 	cheatsNumber = 0;



  1660 



  1661 	int count = 0;



  1662 



  1663 	FILE *f = fopen(file, "rb");



  1664 



  1665 	if (f == NULL)



  1666 		return false;



  1667 



  1668 	int version = 0;



  1669 



  1670 	if (fread(&version, 1, sizeof(version), f) != sizeof(version))



  1671 	{



  1672 		fclose(f);



  1673 		return false;



  1674 	}



  1675 



  1676 	if (version != 1)



  1677 	{



  1678 		systemMessage(MSG_UNSUPPORTED_CHEAT_LIST_VERSION,



  1679 		              N_("Unsupported cheat list version %d"), version);



  1680 		fclose(f);



  1681 		return false;



  1682 	}



  1683 



  1684 	int type = 0;



  1685 	if (fread(&type, 1, sizeof(type), f) != sizeof(type))



  1686 	{



  1687 		fclose(f);



  1688 		return false;



  1689 	}



  1690 



  1691 	if (type != 0)



  1692 	{



  1693 		systemMessage(MSG_UNSUPPORTED_CHEAT_LIST_TYPE,



  1694 		              N_("Unsupported cheat list type %d"), type);



  1695 		fclose(f);



  1696 		return false;



  1697 	}



  1698 



  1699 	if (fread(&count, 1, sizeof(count), f) != sizeof(count))



  1700 	{



  1701 		fclose(f);



  1702 		return false;



  1703 	}



  1704 



  1705 	if (fread(cheatsList, 1, sizeof(cheatsList), f) != sizeof(cheatsList))



  1706 	{



  1707 		fclose(f);



  1708 		return false;



  1709 	}



  1710 



  1711 	bool firstCodeBreaker = true;



  1712 



  1713 	for (int i = 0; i < count; i++)



  1714 	{



  1715 		cheatsList[i].status = 0; // remove old status as it is not used



  1716 		if (!cheatsList[i].codestring[0])



  1717 		{



  1718 			switch (cheatsList[i].size)



  1719 			{



  1720 			case 0:



  1721 				sprintf(cheatsList[i].codestring, "%08x:%02x", cheatsList[i].address,



  1722 				        cheatsList[i].value);



  1723 				break;



  1724 			case 1:



  1725 				sprintf(cheatsList[i].codestring, "%08x:%04x", cheatsList[i].address,



  1726 				        cheatsList[i].value);



  1727 				break;



  1728 			case 2:



  1729 				sprintf(cheatsList[i].codestring, "%08x:%08x", cheatsList[i].address,



  1730 				        cheatsList[i].value);



  1731 				break;



  1732 			}



  1733 		}



  1734 



  1735 		if (cheatsList[i].code == 512 && firstCodeBreaker)



  1736 		{



  1737 			firstCodeBreaker = false;



  1738 			char buffer[10];



  1739 			strncpy(buffer, cheatsList[i].codestring, 8);



  1740 			buffer[8] = 0;



  1741 			u32 address;



  1742 			sscanf(buffer, "%x", &address);



  1743 			if ((address >> 28) == 9)



  1744 			{



  1745 				strncpy(buffer, &cheatsList[i].codestring[9], 4);



  1746 				buffer[4] = 0;



  1747 				u32 value;



  1748 				sscanf(buffer, "%x", &value);



  1749 



  1750 				u32 seed[8];



  1751 				cheatsCBAParseSeedCode(address, value, seed);



  1752 				cheatsCBAChangeEncryption(seed);



  1753 			}



  1754 		}



  1755 	}



  1756 	cheatsNumber = count;



  1757 	fclose(f);



  1758 	return true;



  1759 }



  1760 



  1761 extern int *extCpuLoopTicks;



  1762 extern int *extClockTicks;



  1763 extern int *extTicks;



  1764 extern int  cpuSavedTicks;



  1765 



  1766 extern void debuggerBreakOnWrite(u32 *, u32, u32, int);



  1767 



  1768 #define CPU_BREAK_LOOP2 \



  1769     cpuSavedTicks    = cpuSavedTicks - *extCpuLoopTicks; \



  1770     *extCpuLoopTicks = *extClockTicks; \



  1771     *extTicks        = *extClockTicks;



  1772 



  1773 void cheatsWriteMemory(u32 *address, u32 value, u32 mask)



  1774 {



  1775 #ifdef BKPT_SUPPORT



  1776 #ifdef SDL



  1777 	if (cheatsNumber == 0)



  1778 	{



  1779 		debuggerBreakOnWrite(address, *address, value, 2);



  1780 		CPU_BREAK_LOOP2;



  1781 		*address = value;



  1782 		return;



  1783 	}



  1784 #endif



  1785 #endif



  1786 }



  1787 



  1788 void cheatsWriteHalfWord(u16 *address, u16 value, u16 mask)



  1789 {



  1790 #ifdef BKPT_SUPPORT



  1791 #ifdef SDL



  1792 	if (cheatsNumber == 0)



  1793 	{



  1794 		debuggerBreakOnWrite((u32 *)address, *address, value, 1);



  1795 		CPU_BREAK_LOOP2;



  1796 		*address = value;



  1797 		return;



  1798 	}



  1799 #endif



  1800 #endif



  1801 }



  1802 



  1803 #if defined BKPT_SUPPORT && defined SDL



  1804 void cheatsWriteByte(u8 *address, u8 value)



  1805 #else



  1806 void cheatsWriteByte(u8 *, u8)



  1807 #endif



  1808 {



  1809 #ifdef BKPT_SUPPORT



  1810 #ifdef SDL



  1811 	if (cheatsNumber == 0)



  1812 	{



  1813 		debuggerBreakOnWrite((u32 *)address, *address, value, 0);



  1814 		CPU_BREAK_LOOP2;



  1815 		*address = value;



  1816 		return;



  1817 	}



  1818 #endif



  1819 #endif



  1820 }



  1821 



  1822 #undef CPU_BREAK_LOOP2