Dogcows Code - chaz/thecheat/blob - SearchContext.h

   1
   2 // **********************************************************************
   3 // The Cheat - A universal game cheater for Mac OS X
   4 // (C) 2003-2005 Chaz McGarvey (BrokenZipper)
   5 //
   6 // This program is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 1, or (at your option)
   9 // any later version.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 //
  20
  21
  22 #import <Cocoa/Cocoa.h>
  23 #include "ChazLog.h"
  24
  25 #import "CheaterTypes.h"
  26 #import "Searching.h"
  27 #import "VMRegion.h"
  28 #import "Variable.h"
  29
  30
  31 #define TC_BUFFER_SIZE (8192)
  32 // used when buffers are expanded; use a multiple for 4096 because
  33 // the virtual memory system uses those sizes for optimization.
  34
  35 #define TC_EPSILON (0.1)
  36 // defines the accuracy for floating point comparisons
  37
  38
  39 @interface SearchContext : NSObject
  40 {
  41         /*
  42          * So here's the big, bad, rather ugly search context class.
  43          * There is quite a bit to keep track of, as you can see.
  44          */
  45
  46         TCVariableType _variableType;
  47         TCIntegerSign _integerSign;
  48         TCSearchOperator _operator;
  49         TCSearchType _searchType;
  50
  51         // for fast access while iterating through the task loop.
  52         @public;
  53
  54         pid_t process; // the pid of the process being searched
  55         unsigned regionCount; // estimation of the # of regions used for progress reporting
  56         VMRegion lastRegion; // used to find the next region to search
  57
  58         Variable *value; // the value to compare against (TCGivenValue searches)
  59         BOOL (*compareFunc)(void const *, void const*); // comparison function
  60
  61         TCArray addresses; // array to store hit addresses
  62         TCArray values; // parallel array to store hit values
  63         TCArray regions; // array of addresses, one for each region which contains a hit
  64         TCArray perRegion; // number of variables found for each region
  65         unsigned numberOfResults; // actual number of hits so far
  66
  67         TCArray lastAddresses; // the addresses of variables to check
  68         TCArray lastValues; // the values to compare against (TCLastValue searches)
  69         TCArray lastRegions; // optimizes "again" searches
  70         TCArray lastPerRegion; // parallels lastRegions
  71
  72         void *buffer; // the working buffer for reading in memory from the other app
  73         unsigned bufferSize; // size of the working buffer
  74
  75         // pointers
  76         void *valuePtr, *lastValuePtr;
  77         TCAddress *addressPtr, *lastAddressPtr;
  78         TCAddress *lastRegionPtr;
  79         unsigned *lastPerRegionPtr;
  80
  81         int progress; // 0-100
  82 }
  83
  84 // Initialization
  85
  86 // this initializer must be used to create a context for a first-time search
  87 - (id)initWithPID:(pid_t)pid searchOperator:(TCSearchOperator)op value:(Variable *)val;
  88 // these initializers take data from the last search that was performed
  89 - (id)initWithLastContext:(SearchContext *)context searchOperator:(TCSearchOperator)op;
  90 - (id)initWithLastContext:(SearchContext *)context searchOperator:(TCSearchOperator)op value:(Variable *)val;
  91
  92 // Accessors
  93
  94 - (TCVariableType)variableType;
  95 - (TCIntegerSign)integerSign;
  96 - (TCSearchOperator)searchOperator;
  97
  98 - (BOOL (*)(void const *, void const *))compareFunction;
  99 - (int (*)(id, unsigned))iterationFunction;
 100
 101
 102 @end