l3_arrex.h

此为破解装载器一书中的源代码,在看雪论坛下载的,

#ifndef _INCLUDED_L3_ARREX_H
#define _INCLUDED_L3_ARREX_H

// *Array Exceptions* Copyright (C) Krzysztof Bosak, 2000-11-10...2000-11-20
// All rights reserved.
// [e-mail]
// http://www.kbosak.prv.pl

// neither <exception> nor <stdexcept> are not widely implemented, as for 2000-11-19.

#include <string.h>
#ifndef NDEBUG
	#include <string.h>
#endif

#ifdef USE_ARRAY_EXCEPTIONS
class ArrayEx
{
protected:
	static char * const _description;
	static const unsigned MAX_DESCRIPTION_LENGTH;
	inline ArrayEx(const char * const strf, int strl, int arrlen)
	{	// protected constructor: you can create an object derived from this class
		assert(strf!=NULL);
		assert(_description!=NULL);
		sprintf(const_cast<char*>(_description),
			"Compilation stardate is %s, %s.\n"
			"Array Exception thrown in file %s at line %d.\n"
			"Last recorded array size was %d.\n",
			__DATE__, __TIME__, strf, strl, arrlen);
		assert( strlen(_description)+1 < MAX_DESCRIPTION_LENGTH );
	}
	friend ostream& operator<<(ostream& str, const ArrayEx&)
	{
		assert(ArrayEx::_description!=NULL);
		return str<<ArrayEx::_description;
	}
};
char * const ArrayEx::_description=new char[MAX_DESCRIPTION_LENGTH];
const unsigned ArrayEx::MAX_DESCRIPTION_LENGTH=1024;

class OutOfMemoryEx: public ArrayEx
{
public:
	inline OutOfMemoryEx(int cells, int cellsize, const char * const strf, int strl, int arrlen)
		: ArrayEx(strf, strl, arrlen)
	{
		assert( strlen(_description)+1 < MAX_DESCRIPTION_LENGTH );
		sprintf(const_cast<char*>(_description)+strlen(_description),
			"Out Of Memory, tried to allocate %d cell(s), %d byte(s) each (%dKB total).\n",
			cells, cellsize, static_cast<int>(cells*cellsize/1024.0+0.5));
	}
};
class SentinelOverwrittenEx: public ArrayEx
{
public:
	inline SentinelOverwrittenEx(const char * const strf, int strl, int arrlen)
		: ArrayEx(strf, strl, arrlen)
	{
		assert( strlen(_description)+1 < MAX_DESCRIPTION_LENGTH );
		sprintf(const_cast<char*>(_description)+strlen(_description),
			"One of two terminating sentinels were overwritten.\n");
	}
};
class BadIndexEx: public ArrayEx
{
public:
	inline BadIndexEx(int bad_array_index, const char * const strf, int strl, int arrlen)
		: ArrayEx(strf, strl, arrlen)
	{
		assert( strlen(_description)+1 < MAX_DESCRIPTION_LENGTH );
		sprintf(const_cast<char*>(_description)+strlen(_description),
			"Unauthorized access out of array boundary, used index: %d.\n", bad_array_index);
	}
};
class TooLowIndexEx: public BadIndexEx
{
public:
	inline TooLowIndexEx(int bad_array_index, const char * const strf, int strl, int arrlen)
		: BadIndexEx(bad_array_index, strf, strl, arrlen)
	{
		assert( strlen(_description)+1 < MAX_DESCRIPTION_LENGTH );
		sprintf(const_cast<char*>(_description)+strlen(_description),
			"Too low array index.\n");
	}
};
class TooBigIndexEx: public BadIndexEx
{
public:
	inline TooBigIndexEx(int bad_array_index, const char * const strf, int strl, int arrlen)
		: BadIndexEx(bad_array_index, strf, strl, arrlen)
	{
		assert( strlen(_description)+1 < MAX_DESCRIPTION_LENGTH );
		sprintf(const_cast<char*>(_description)+strlen(_description),
			"Too big array index.\n");
	}
};
#endif // USE_ARRAY_EXCEPTIONS

#endif //_INCLUDED_L3_ARREX_H