The Cheat 1.2

[chaz/thecheat] / SearchContext.h

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+//
+//  SearchContext.h
+//  The Cheat
+//
+//  Created by Chaz McGarvey on 12/4/04.
+//  Copyright 2004 Chaz McGarvey. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+#include "ChazLog.h"
+
+#import "CheaterTypes.h"
+#import "Searching.h"
+#import "VMRegion.h"
+#import "Variable.h"
+
+
+#define TC_BUFFER_SIZE (8192)
+// used when buffers are expanded; use a multiple for 4096 because
+// the virtual memory system uses those sizes for optimization.
+
+#define TC_EPSILON (0.1)
+// defines the accuracy for floating point comparisons
+
+
+@interface SearchContext : NSObject
+{
+       /*
+        * So here's the big, bad, rather ugly search context class.
+        * There is quite a bit to keep track of, as you can see.
+        */
+       
+       TCVariableType _variableType;
+       TCIntegerSign _integerSign;
+       TCSearchOperator _operator;
+       TCSearchType _searchType;
+       
+       // for fast access while iterating through the task loop.
+       @public;
+       
+       pid_t process; // the pid of the process being searched
+       unsigned regionCount; // estimation of the # of regions used for progress reporting
+       VMRegion lastRegion; // used to find the next region to search
+       
+       Variable *value; // the value to compare against (TCGivenValue searches)
+       BOOL (*compareFunc)(void const *, void const*); // comparison function
+       
+       TCArray addresses; // array to store hit addresses
+       TCArray values; // parallel array to store hit values
+       TCArray regions; // array of addresses, one for each region which contains a hit
+       TCArray perRegion; // number of variables found for each region
+       unsigned numberOfResults; // actual number of hits so far
+       
+       TCArray lastAddresses; // the addresses of variables to check
+       TCArray lastValues; // the values to compare against (TCLastValue searches)
+       TCArray lastRegions; // optimizes "again" searches
+       TCArray lastPerRegion; // parallels lastRegions
+       
+       void *buffer; // the working buffer for reading in memory from the other app
+       unsigned bufferSize; // size of the working buffer
+       
+       // pointers
+       void *valuePtr, *lastValuePtr;
+       TCAddress *addressPtr, *lastAddressPtr;
+       TCAddress *lastRegionPtr;
+       unsigned *lastPerRegionPtr;
+       
+       int progress; // 0-100
+}
+
+// Initialization
+
+// this initializer must be used to create a context for a first-time search
+- (id)initWithPID:(pid_t)pid searchOperator:(TCSearchOperator)op value:(Variable *)val;
+// these initializers take data from the last search that was performed
+- (id)initWithLastContext:(SearchContext *)context searchOperator:(TCSearchOperator)op;
+- (id)initWithLastContext:(SearchContext *)context searchOperator:(TCSearchOperator)op value:(Variable *)val;
+
+// Accessors
+
+- (TCVariableType)variableType;
+- (TCIntegerSign)integerSign;
+- (TCSearchOperator)searchOperator;
+
+- (BOOL (*)(void const *, void const *))compareFunction;
+- (int (*)(id, unsigned))iterationFunction;
+
+
+@end