Mercurial > vba-linux

     1 #include <cstdio>

     2 #include <cstdlib>

     3 #include <cctype>

     4 #include <cstring>

     5 

     6 #include "../NLS.h"

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

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

     9 

    10 #include "gbCheats.h"

    11 #include "gbGlobals.h"

    12 

    13 gbCheat gbCheatList[100];

    14 int     gbCheatNumber = 0;

    15 bool    gbCheatMap[0x10000];

    16 

    17 extern bool8 cheatsEnabled;

    18 

    19 #define GBCHEAT_IS_HEX(a) (((a) >= 'A' && (a) <= 'F') || ((a) >= '0' && (a) <= '9'))

    20 #define GBCHEAT_HEX_VALUE(a) ((a) >= 'A' ? (a) - 'A' + 10 : (a) - '0')

    21 

    22 void gbCheatUpdateMap()

    23 {

    24 	memset(gbCheatMap, 0, 0x10000);

    25 

    26 	for (int i = 0; i < gbCheatNumber; i++)

    27 	{

    28 		if (gbCheatList[i].enabled)

    29 			gbCheatMap[gbCheatList[i].address] = true;

    30 	}

    31 }

    32 

    33 void gbCheatsSaveGame(gzFile gzFile)

    34 {

    35 	utilWriteInt(gzFile, gbCheatNumber);

    36 	if (gbCheatNumber)

    37 		utilGzWrite(gzFile, &gbCheatList[0], sizeof(gbCheat)*gbCheatNumber);

    38 }

    39 

    40 void gbCheatsReadGame(gzFile gzFile, int version)

    41 {

    42 	if (version <= 8)

    43 	{

    44 		int gbGgOn = utilReadInt(gzFile);

    45 

    46 		if (gbGgOn)

    47 		{

    48 			int       n = utilReadInt(gzFile);

    49 			gbXxCheat tmpCheat;

    50 			for (int i = 0; i < n; i++)

    51 			{

    52 				utilGzRead(gzFile, &tmpCheat, sizeof(gbXxCheat));

    53 				gbAddGgCheat(tmpCheat.cheatCode, tmpCheat.cheatDesc);

    54 			}

    55 		}

    56 

    57 		int gbGsOn = utilReadInt(gzFile);

    58 

    59 		if (gbGsOn)

    60 		{

    61 			int       n = utilReadInt(gzFile);

    62 			gbXxCheat tmpCheat;

    63 			for (int i = 0; i < n; i++)

    64 			{

    65 				utilGzRead(gzFile, &tmpCheat, sizeof(gbXxCheat));

    66 				gbAddGsCheat(tmpCheat.cheatCode, tmpCheat.cheatDesc);

    67 			}

    68 		}

    69 	}

    70 	else

    71 	{

    72 		gbCheatNumber = utilReadInt(gzFile);

    73 

    74 		if (gbCheatNumber)

    75 		{

    76 			utilGzRead(gzFile, &gbCheatList[0], sizeof(gbCheat)*gbCheatNumber);

    77 		}

    78 	}

    79 

    80 	gbCheatUpdateMap();

    81 }

    82 

    83 void gbCheatsSaveCheatList(const char *file)

    84 {

    85 	if (gbCheatNumber == 0)

    86 		return;

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

    88 	if (f == NULL)

    89 		return;

    90 	int version = 1;

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

    92 	int type = 1;

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

    94 	fwrite(&gbCheatNumber, 1, sizeof(gbCheatNumber), f);

    95 	fwrite(gbCheatList, 1, sizeof(gbCheatList), f);

    96 	fclose(f);

    97 }

    98 

    99 bool gbCheatsLoadCheatList(const char *file)

   100 {

   101 	gbCheatNumber = 0;

   102 

   103 	gbCheatUpdateMap();

   104 

   105 	int count = 0;

   106 

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

   108 

   109 	if (f == NULL)

   110 		return false;

   111 

   112 	int version = 0;

   113 

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

   115 	{

   116 		fclose(f);

   117 		return false;

   118 	}

   119 

   120 	if (version != 1)

   121 	{

   122 		systemMessage(MSG_UNSUPPORTED_CHEAT_LIST_VERSION,

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

   124 		fclose(f);

   125 		return false;

   126 	}

   127 

   128 	int type = 0;

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

   130 	{

   131 		fclose(f);

   132 		return false;

   133 	}

   134 

   135 	if (type != 1)

   136 	{

   137 		systemMessage(MSG_UNSUPPORTED_CHEAT_LIST_TYPE,

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

   139 		fclose(f);

   140 		return false;

   141 	}

   142 

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

   144 	{

   145 		fclose(f);

   146 		return false;

   147 	}

   148 

   149 	if (fread(gbCheatList, 1, sizeof(gbCheatList), f) != sizeof(gbCheatList))

   150 	{

   151 		fclose(f);

   152 		return false;

   153 	}

   154 

   155 	fclose(f);

   156 	gbCheatNumber = count;

   157 	gbCheatUpdateMap();

   158 

   159 	return true;

   160 }

   161 

   162 bool gbVerifyGsCode(const char *code)

   163 {

   164 	int len = strlen(code);

   165 

   166 	if (len == 0)

   167 		return true;

   168 

   169 	if (len != 8)

   170 		return false;

   171 

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

   173 		if (!GBCHEAT_IS_HEX(code[i]))

   174 			return false;

   175 

   176 	int address = GBCHEAT_HEX_VALUE(code[6]) << 12 |

   177 	              GBCHEAT_HEX_VALUE(code[7]) << 8 |

   178 	              GBCHEAT_HEX_VALUE(code[4]) << 4 |

   179 	              GBCHEAT_HEX_VALUE(code[5]);

   180 

   181 	if (address < 0xa000 ||

   182 	    address > 0xdfff)

   183 		return false;

   184 

   185 	return true;

   186 }

   187 

   188 void gbAddGsCheat(const char *code, const char *desc)

   189 {

   190 	if (gbCheatNumber > 99)

   191 	{

   192 		systemMessage(MSG_MAXIMUM_NUMBER_OF_CHEATS,

   193 		              N_("Maximum number of cheats reached."));

   194 		return;

   195 	}

   196 

   197 	if (!gbVerifyGsCode(code))

   198 	{

   199 		systemMessage(MSG_INVALID_GAMESHARK_CODE,

   200 		              N_("Invalid GameShark code: %s"), code);

   201 		return;

   202 	}

   203 

   204 	int i = gbCheatNumber;

   205 

   206 	strcpy(gbCheatList[i].cheatCode, code);

   207 	strcpy(gbCheatList[i].cheatDesc, desc);

   208 

   209 	gbCheatList[i].code = GBCHEAT_HEX_VALUE(code[0]) << 4 |

   210 	                      GBCHEAT_HEX_VALUE(code[1]);

   211 

   212 	gbCheatList[i].value = GBCHEAT_HEX_VALUE(code[2]) << 4 |

   213 	                       GBCHEAT_HEX_VALUE(code[3]);

   214 

   215 	gbCheatList[i].address = GBCHEAT_HEX_VALUE(code[6]) << 12 |

   216 	                         GBCHEAT_HEX_VALUE(code[7]) << 8 |

   217 	                         GBCHEAT_HEX_VALUE(code[4]) << 4 |

   218 	                         GBCHEAT_HEX_VALUE(code[5]);

   219 

   220 	gbCheatList[i].compare = 0;

   221 

   222 	gbCheatList[i].enabled = true;

   223 

   224 	gbCheatMap[gbCheatList[i].address] = true;

   225 

   226 	gbCheatNumber++;

   227 }

   228 

   229 bool gbVerifyGgCode(const char *code)

   230 {

   231 	int len = strlen(code);

   232 

   233 	if (len != 11 &&

   234 	    len != 7 &&

   235 	    len != 6 &&

   236 	    len != 0)

   237 		return false;

   238 

   239 	if (len == 0)

   240 		return true;

   241 

   242 	if (!GBCHEAT_IS_HEX(code[0]))

   243 		return false;

   244 	if (!GBCHEAT_IS_HEX(code[1]))

   245 		return false;

   246 	if (!GBCHEAT_IS_HEX(code[2]))

   247 		return false;

   248 	if (code[3] != '-')

   249 		return false;

   250 	if (!GBCHEAT_IS_HEX(code[4]))

   251 		return false;

   252 	if (!GBCHEAT_IS_HEX(code[5]))

   253 		return false;

   254 	if (!GBCHEAT_IS_HEX(code[6]))

   255 		return false;

   256 	if (code[7] != 0)

   257 	{

   258 		if (code[7] != '-')

   259 			return false;

   260 		if (code[8] != 0)

   261 		{

   262 			if (!GBCHEAT_IS_HEX(code[8]))

   263 				return false;

   264 			if (!GBCHEAT_IS_HEX(code[9]))

   265 				return false;

   266 			if (!GBCHEAT_IS_HEX(code[10]))

   267 				return false;

   268 		}

   269 	}

   270 

   271 	//  int replace = (GBCHEAT_HEX_VALUE(code[0]) << 4) +

   272 	//    GBCHEAT_HEX_VALUE(code[1]);

   273 

   274 	int address = (GBCHEAT_HEX_VALUE(code[2]) << 8) +

   275 	              (GBCHEAT_HEX_VALUE(code[4]) << 4) +

   276 	              (GBCHEAT_HEX_VALUE(code[5])) +

   277 	              ((GBCHEAT_HEX_VALUE(code[6]) ^ 0x0f) << 12);

   278 

   279 	if (address >= 0x8000 && address <= 0x9fff)

   280 		return false;

   281 

   282 	if (address >= 0xc000)

   283 		return false;

   284 

   285 	if (code[7] == 0 || code[8] == '0')

   286 		return true;

   287 

   288 	int compare = (GBCHEAT_HEX_VALUE(code[8]) << 4) +

   289 	              (GBCHEAT_HEX_VALUE(code[10]));

   290 	compare  = compare ^ 0xff;

   291 	compare  = (compare >> 2) | ((compare << 6) & 0xc0);

   292 	compare ^= 0x45;

   293 

   294 	int cloak = (GBCHEAT_HEX_VALUE(code[8])) ^ (GBCHEAT_HEX_VALUE(code[9]));

   295 

   296 	if (cloak >= 1 && cloak <= 7)

   297 		return false;

   298 

   299 	return true;

   300 }

   301 

   302 void gbAddGgCheat(const char *code, const char *desc)

   303 {

   304 	if (gbCheatNumber > 99)

   305 	{

   306 		systemMessage(MSG_MAXIMUM_NUMBER_OF_CHEATS,

   307 		              N_("Maximum number of cheats reached."));

   308 		return;

   309 	}

   310 

   311 	if (!gbVerifyGgCode(code))

   312 	{

   313 		systemMessage(MSG_INVALID_GAMEGENIE_CODE,

   314 		              N_("Invalid GameGenie code: %s"), code);

   315 		return;

   316 	}

   317 

   318 	int i = gbCheatNumber;

   319 

   320 	int len = strlen(code);

   321 

   322 	strcpy(gbCheatList[i].cheatCode, code);

   323 	strcpy(gbCheatList[i].cheatDesc, desc);

   324 

   325 	gbCheatList[i].code  = 1;

   326 	gbCheatList[i].value = (GBCHEAT_HEX_VALUE(code[0]) << 4) +

   327 	                       GBCHEAT_HEX_VALUE(code[1]);

   328 

   329 	gbCheatList[i].address = (GBCHEAT_HEX_VALUE(code[2]) << 8) +

   330 	                         (GBCHEAT_HEX_VALUE(code[4]) << 4) +

   331 	                         (GBCHEAT_HEX_VALUE(code[5])) +

   332 	                         ((GBCHEAT_HEX_VALUE(code[6]) ^ 0x0f) << 12);

   333 

   334 	gbCheatList[i].compare = 0;

   335 

   336 	if (len != 7 && len != 8)

   337 	{

   338 		int compare = (GBCHEAT_HEX_VALUE(code[8]) << 4) +

   339 		              (GBCHEAT_HEX_VALUE(code[10]));

   340 		compare  = compare ^ 0xff;

   341 		compare  = (compare >> 2) | ((compare << 6) & 0xc0);

   342 		compare ^= 0x45;

   343 

   344 		gbCheatList[i].compare = compare;

   345 		gbCheatList[i].code    = 0;

   346 	}

   347 

   348 	gbCheatList[i].enabled = true;

   349 

   350 	gbCheatMap[gbCheatList[i].address] = true;

   351 

   352 	gbCheatNumber++;

   353 }

   354 

   355 void gbCheatRemove(int i)

   356 {

   357 	if (i < 0 || i >= gbCheatNumber)

   358 	{

   359 		systemMessage(MSG_INVALID_CHEAT_TO_REMOVE,

   360 		              N_("Invalid cheat to remove %d"), i);

   361 		return;

   362 	}

   363 

   364 	if ((i+1) <  gbCheatNumber)

   365 	{

   366 		memcpy(&gbCheatList[i], &gbCheatList[i+1], sizeof(gbCheat)*

   367 		       (gbCheatNumber-i-1));

   368 	}

   369 

   370 	gbCheatNumber--;

   371 

   372 	gbCheatUpdateMap();

   373 }

   374 

   375 void gbCheatRemoveAll()

   376 {

   377 	gbCheatNumber = 0;

   378 	gbCheatUpdateMap();

   379 }

   380 

   381 void gbCheatEnable(int i)

   382 {

   383 	if (i >= 0 && i < gbCheatNumber)

   384 	{

   385 		if (!gbCheatList[i].enabled)

   386 		{

   387 			gbCheatList[i].enabled = true;

   388 			gbCheatUpdateMap();

   389 		}

   390 	}

   391 }

   392 

   393 void gbCheatDisable(int i)

   394 {

   395 	if (i >= 0 && i < gbCheatNumber)

   396 	{

   397 		if (gbCheatList[i].enabled)

   398 		{

   399 			gbCheatList[i].enabled = false;

   400 			gbCheatUpdateMap();

   401 		}

   402 	}

   403 }

   404 

   405 bool gbCheatReadGSCodeFile(const char *fileName)

   406 {

   407 	FILE *file = fopen(fileName, "rb");

   408 

   409 	if (!file)

   410 		return false;

   411 

   412 	fseek(file, 0x18, SEEK_SET);

   413 	int count = 0;

   414 	fread(&count, 1, 2, file);

   415 	int dummy = 0;

   416 	gbCheatRemoveAll();

   417 	char desc[13];

   418 	char code[9];

   419 	int  i;

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

   421 	{

   422 		fread(&dummy, 1, 2, file);

   423 		fread(desc, 1, 12, file);

   424 		desc[12] = 0;

   425 		fread(code, 1, 8, file);

   426 		code[8] = 0;

   427 		gbAddGsCheat(code, desc);

   428 	}

   429 

   430 	for (i = 0; i < gbCheatNumber; i++)

   431 		gbCheatDisable(i);

   432 

   433 	fclose(file);

   434 	return true;

   435 }

   436 

   437 u8 gbCheatRead(u16 address)

   438 {

   439 	if (!cheatsEnabled)

   440 		return gbReadMemoryQuick(address);

   441 

   442 	for (int i = 0; i < gbCheatNumber; i++)

   443 	{

   444 		if (gbCheatList[i].enabled && gbCheatList[i].address == address)

   445 		{

   446 			switch (gbCheatList[i].code)

   447 			{

   448 			case 0x100: // GameGenie support

   449 				if (gbReadMemoryQuick(address) == gbCheatList[i].compare)

   450 					return gbCheatList[i].value;

   451 				break;

   452 			case 0x00:

   453 			case 0x01:

   454 			case 0x80:

   455 				return gbCheatList[i].value;

   456 			case 0x90:

   457 			case 0x91:

   458 			case 0x92:

   459 			case 0x93:

   460 			case 0x94:

   461 			case 0x95:

   462 			case 0x96:

   463 			case 0x97:

   464 				if (address >= 0xd000 && address < 0xe000)

   465 				{

   466 					if (((gbMemoryMap[0x0d] - gbWram)/0x1000) ==

   467 					    (gbCheatList[i].code - 0x90))

   468 						return gbCheatList[i].value;

   469 				}

   470 				else

   471 					return gbCheatList[i].value;

   472 			}

   473 		}

   474 	}

   475 	return gbReadMemoryQuick(address);

   476 }

   477
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:33:11 -0600
parents	f9f4f1b99eed
children	5e8e5083da94