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

   1 //
   2 //  SearchContext.h
   3 //  The Cheat
   4 //
   5 //  Created by Chaz McGarvey on 12/4/04.
   6 //  Copyright 2004 Chaz McGarvey. All rights reserved.
   7 //
   8
   9 #import <Cocoa/Cocoa.h>
  10 #include "ChazLog.h"
  11
  12 #import "CheaterTypes.h"
  13 #import "Searching.h"
  14 #import "VMRegion.h"
  15 #import "Variable.h"
  16
  17
  18 #define TC_BUFFER_SIZE (8192)
  19 // used when buffers are expanded; use a multiple for 4096 because
  20 // the virtual memory system uses those sizes for optimization.
  21
  22 #define TC_EPSILON (0.1)
  23 // defines the accuracy for floating point comparisons
  24
  25
  26 @interface SearchContext : NSObject
  27 {
  28         /*
  29          * So here's the big, bad, rather ugly search context class.
  30          * There is quite a bit to keep track of, as you can see.
  31          */
  32
  33         TCVariableType _variableType;
  34         TCIntegerSign _integerSign;
  35         TCSearchOperator _operator;
  36         TCSearchType _searchType;
  37
  38         // for fast access while iterating through the task loop.
  39         @public;
  40
  41         pid_t process; // the pid of the process being searched
  42         unsigned regionCount; // estimation of the # of regions used for progress reporting
  43         VMRegion lastRegion; // used to find the next region to search
  44
  45         Variable *value; // the value to compare against (TCGivenValue searches)
  46         BOOL (*compareFunc)(void const *, void const*); // comparison function
  47
  48         TCArray addresses; // array to store hit addresses
  49         TCArray values; // parallel array to store hit values
  50         TCArray regions; // array of addresses, one for each region which contains a hit
  51         TCArray perRegion; // number of variables found for each region
  52         unsigned numberOfResults; // actual number of hits so far
  53
  54         TCArray lastAddresses; // the addresses of variables to check
  55         TCArray lastValues; // the values to compare against (TCLastValue searches)
  56         TCArray lastRegions; // optimizes "again" searches
  57         TCArray lastPerRegion; // parallels lastRegions
  58
  59         void *buffer; // the working buffer for reading in memory from the other app
  60         unsigned bufferSize; // size of the working buffer
  61
  62         // pointers
  63         void *valuePtr, *lastValuePtr;
  64         TCAddress *addressPtr, *lastAddressPtr;
  65         TCAddress *lastRegionPtr;
  66         unsigned *lastPerRegionPtr;
  67
  68         int progress; // 0-100
  69 }
  70
  71 // Initialization
  72
  73 // this initializer must be used to create a context for a first-time search
  74 - (id)initWithPID:(pid_t)pid searchOperator:(TCSearchOperator)op value:(Variable *)val;
  75 // these initializers take data from the last search that was performed
  76 - (id)initWithLastContext:(SearchContext *)context searchOperator:(TCSearchOperator)op;
  77 - (id)initWithLastContext:(SearchContext *)context searchOperator:(TCSearchOperator)op value:(Variable *)val;
  78
  79 // Accessors
  80
  81 - (TCVariableType)variableType;
  82 - (TCIntegerSign)integerSign;
  83 - (TCSearchOperator)searchOperator;
  84
  85 - (BOOL (*)(void const *, void const *))compareFunction;
  86 - (int (*)(id, unsigned))iterationFunction;
  87
  88
  89 @end