Mercurial > vba-linux

     1 #include <cstdlib>

     2 #include <cstring>

     3 

     4 #include "CheatSearch.h"

     5 

     6 CheatSearchBlock cheatSearchBlocks[4];

     7 

     8 CheatSearchData cheatSearchData = {

     9 	0,

    10 	cheatSearchBlocks

    11 };

    12 

    13 static bool cheatSearchEQ(u32 a, u32 b)

    14 {

    15 	return a == b;

    16 }

    17 

    18 static bool cheatSearchNE(u32 a, u32 b)

    19 {

    20 	return a != b;

    21 }

    22 

    23 static bool cheatSearchLT(u32 a, u32 b)

    24 {

    25 	return a < b;

    26 }

    27 

    28 static bool cheatSearchLE(u32 a, u32 b)

    29 {

    30 	return a <= b;

    31 }

    32 

    33 static bool cheatSearchGT(u32 a, u32 b)

    34 {

    35 	return a > b;

    36 }

    37 

    38 static bool cheatSearchGE(u32 a, u32 b)

    39 {

    40 	return a >= b;

    41 }

    42 

    43 static bool cheatSearchSignedEQ(s32 a, s32 b)

    44 {

    45 	return a == b;

    46 }

    47 

    48 static bool cheatSearchSignedNE(s32 a, s32 b)

    49 {

    50 	return a != b;

    51 }

    52 

    53 static bool cheatSearchSignedLT(s32 a, s32 b)

    54 {

    55 	return a < b;

    56 }

    57 

    58 static bool cheatSearchSignedLE(s32 a, s32 b)

    59 {

    60 	return a <= b;

    61 }

    62 

    63 static bool cheatSearchSignedGT(s32 a, s32 b)

    64 {

    65 	return a > b;

    66 }

    67 

    68 static bool cheatSearchSignedGE(s32 a, s32 b)

    69 {

    70 	return a >= b;

    71 }

    72 

    73 static bool (*cheatSearchFunc[])(u32, u32) = {

    74 	cheatSearchEQ,

    75 	cheatSearchNE,

    76 	cheatSearchLT,

    77 	cheatSearchLE,

    78 	cheatSearchGT,

    79 	cheatSearchGE

    80 };

    81 

    82 static bool (*cheatSearchSignedFunc[])(s32, s32) = {

    83 	cheatSearchSignedEQ,

    84 	cheatSearchSignedNE,

    85 	cheatSearchSignedLT,

    86 	cheatSearchSignedLE,

    87 	cheatSearchSignedGT,

    88 	cheatSearchSignedGE

    89 };

    90 

    91 void cheatSearchSetSavedAndBits(CheatSearchBlock *block)

    92 {

    93 	if (!block->saved)

    94 	{

    95 		block->saved = (u8 *)malloc(block->size);

    96 		memcpy(block->saved, block->data, block->size);

    97 	}

    98 	if (!block->bits)

    99 	{

   100 		block->bits  = (u8 *)malloc(block->size >> 3);

   101 		memset(block->bits, 0xff, block->size >> 3);

   102 	}

   103 }

   104 

   105 void cheatSearchZeroBlock(CheatSearchBlock *block)

   106 {

   107 	block->data	  = 0;

   108 	block->offset = 0;

   109 	block->size	  = 0;

   110 	free(block->saved);

   111 	free(block->bits);

   112 	block->saved  = 0;

   113 	block->bits	  = 0;

   114 }

   115 

   116 void cheatSearchCleanup(CheatSearchData *cs)

   117 {

   118 	int count = cs->count;

   119 

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

   121 	{

   122 		CheatSearchBlock &block = cs->blocks[i];

   123 		free(block.saved);

   124 		free(block.bits);

   125 		block.saved = 0;

   126 		block.bits  = 0;

   127 	}

   128 	cs->count = 0;

   129 }

   130 

   131 void cheatSearchStart(const CheatSearchData *cs)

   132 {

   133 	int count = cs->count;

   134 

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

   136 	{

   137 		CheatSearchBlock *block = &cs->blocks[i];

   138 

   139 		memset(block->bits, 0xff, block->size >> 3);

   140 		memcpy(block->saved, block->data, block->size);

   141 	}

   142 }

   143 

   144 s32 cheatSearchSignedRead(u8 *data, int off, int size)

   145 {

   146 	u32 res = data[off++];

   147 

   148 	switch (size)

   149 	{

   150 	case BITS_8:

   151 		res <<= 24;

   152 		return ((s32)res) >> 24;

   153 	case BITS_16:

   154 		res  |= ((u32)data[off++])<<8;

   155 		res <<= 16;

   156 		return ((s32)res) >> 16;

   157 	case BITS_32:

   158 		res |= ((u32)data[off++])<<8;

   159 		res |= ((u32)data[off++])<<16;

   160 		res |= ((u32)data[off++])<<24;

   161 		return (s32)res;

   162 	}

   163 	return (s32)res;

   164 }

   165 

   166 u32 cheatSearchRead(u8 *data, int off, int size)

   167 {

   168 	u32 res = data[off++];

   169 	if (size == BITS_16)

   170 		res |= ((u32)data[off++])<<8;

   171 	else if (size == BITS_32)

   172 	{

   173 		res |= ((u32)data[off++])<<8;

   174 		res |= ((u32)data[off++])<<16;

   175 		res |= ((u32)data[off++])<<24;

   176 	}

   177 	return res;

   178 }

   179 

   180 void cheatSearch(const CheatSearchData *cs, int compare, int size,

   181                  bool isSigned)

   182 {

   183 	if (compare < 0 || compare > SEARCH_GE)

   184 		return;

   185 	int inc = 1;

   186 	if (size == BITS_16)

   187 		inc = 2;

   188 	else if (size == BITS_32)

   189 		inc = 4;

   190 

   191 	if (isSigned)

   192 	{

   193 		bool (*func)(s32, s32) = cheatSearchSignedFunc[compare];

   194 

   195 		for (int i = 0; i < cs->count; i++)

   196 		{

   197 			CheatSearchBlock *block = &cs->blocks[i];

   198 			int size2 = block->size;

   199 			u8 *bits  = block->bits;

   200 			u8 *data  = block->data;

   201 			u8 *saved = block->saved;

   202 

   203 			for (int j = 0; j < size2; j += inc)

   204 			{

   205 				if (IS_BIT_SET(bits, j))

   206 				{

   207 					s32 a = cheatSearchSignedRead(data, j, size);

   208 					s32 b = cheatSearchSignedRead(saved, j, size);

   209 

   210 					if (!func(a, b))

   211 					{

   212 						CLEAR_BIT(bits, j);

   213 						if (size == BITS_16)

   214 							CLEAR_BIT(bits, j+1);

   215 						if (size == BITS_32)

   216 						{

   217 							CLEAR_BIT(bits, j+2);

   218 							CLEAR_BIT(bits, j+3);

   219 						}

   220 					}

   221 				}

   222 			}

   223 		}

   224 	}

   225 	else

   226 	{

   227 		bool (*func)(u32, u32) = cheatSearchFunc[compare];

   228 

   229 		for (int i = 0; i < cs->count; i++)

   230 		{

   231 			CheatSearchBlock *block = &cs->blocks[i];

   232 			int size2 = block->size;

   233 			u8 *bits  = block->bits;

   234 			u8 *data  = block->data;

   235 			u8 *saved = block->saved;

   236 

   237 			for (int j = 0; j < size2; j += inc)

   238 			{

   239 				if (IS_BIT_SET(bits, j))

   240 				{

   241 					u32 a = cheatSearchRead(data, j, size);

   242 					u32 b = cheatSearchRead(saved, j, size);

   243 

   244 					if (!func(a, b))

   245 					{

   246 						CLEAR_BIT(bits, j);

   247 						if (size == BITS_16)

   248 							CLEAR_BIT(bits, j+1);

   249 						if (size == BITS_32)

   250 						{

   251 							CLEAR_BIT(bits, j+2);

   252 							CLEAR_BIT(bits, j+3);

   253 						}

   254 					}

   255 				}

   256 			}

   257 		}

   258 	}

   259 }

   260 

   261 void cheatSearchValue(const CheatSearchData *cs, int compare, int size,

   262                       bool isSigned, u32 value)

   263 {

   264 	if (compare < 0 || compare > SEARCH_GE)

   265 		return;

   266 	int inc = 1;

   267 	if (size == BITS_16)

   268 		inc = 2;

   269 	else if (size == BITS_32)

   270 		inc = 4;

   271 

   272 	if (isSigned)

   273 	{

   274 		bool (*func)(s32, s32) = cheatSearchSignedFunc[compare];

   275 

   276 		for (int i = 0; i < cs->count; i++)

   277 		{

   278 			CheatSearchBlock *block = &cs->blocks[i];

   279 			int size2 = block->size;

   280 			u8 *bits  = block->bits;

   281 			u8 *data  = block->data;

   282 

   283 			for (int j = 0; j < size2; j += inc)

   284 			{

   285 				if (IS_BIT_SET(bits, j))

   286 				{

   287 					s32 a = cheatSearchSignedRead(data, j, size);

   288 					s32 b = (s32)value;

   289 

   290 					if (!func(a, b))

   291 					{

   292 						CLEAR_BIT(bits, j);

   293 						if (size == BITS_16)

   294 							CLEAR_BIT(bits, j+1);

   295 						if (size == BITS_32)

   296 						{

   297 							CLEAR_BIT(bits, j+2);

   298 							CLEAR_BIT(bits, j+3);

   299 						}

   300 					}

   301 				}

   302 			}

   303 		}

   304 	}

   305 	else

   306 	{

   307 		bool (*func)(u32, u32) = cheatSearchFunc[compare];

   308 

   309 		for (int i = 0; i < cs->count; i++)

   310 		{

   311 			CheatSearchBlock *block = &cs->blocks[i];

   312 			int size2 = block->size;

   313 			u8 *bits  = block->bits;

   314 			u8 *data  = block->data;

   315 

   316 			for (int j = 0; j < size2; j += inc)

   317 			{

   318 				if (IS_BIT_SET(bits, j))

   319 				{

   320 					u32 a = cheatSearchRead(data, j, size);

   321 

   322 					if (!func(a, value))

   323 					{

   324 						CLEAR_BIT(bits, j);

   325 						if (size == BITS_16)

   326 							CLEAR_BIT(bits, j+1);

   327 						if (size == BITS_32)

   328 						{

   329 							CLEAR_BIT(bits, j+2);

   330 							CLEAR_BIT(bits, j+3);

   331 						}

   332 					}

   333 				}

   334 			}

   335 		}

   336 	}

   337 }

   338 

   339 int cheatSearchGetCount(const CheatSearchData *cs, int size)

   340 {

   341 	int res = 0;

   342 	int inc = 1;

   343 	if (size == BITS_16)

   344 		inc = 2;

   345 	else if (size == BITS_32)

   346 		inc = 4;

   347 

   348 	for (int i = 0; i < cs->count; i++)

   349 	{

   350 		CheatSearchBlock *block = &cs->blocks[i];

   351 

   352 		int size2 = block->size;

   353 		u8 *bits  = block->bits;

   354 		for (int j = 0; j < size2; j += inc)

   355 		{

   356 			if (IS_BIT_SET(bits, j))

   357 				res++;

   358 		}

   359 	}

   360 	return res;

   361 }

   362 

   363 void cheatSearchUpdateValues(const CheatSearchData *cs)

   364 {

   365 	for (int i = 0; i < cs->count; i++)

   366 	{

   367 		CheatSearchBlock *block = &cs->blocks[i];

   368 

   369 		memcpy(block->saved, block->data, block->size);

   370 	}

   371 }
author	Robert McIntyre <rlm@mit.edu>
date	Thu, 21 Mar 2013 17:21:54 +0000
parents	f9f4f1b99eed
children