#define INTERNAL_SIZE_T size_t

struct _chunk { 
	 struct				_chunk * fd; 
     struct				_chunk * bk;
	 unsigned long		xz1;
     INTERNAL_SIZE_T	prev_size; 
     INTERNAL_SIZE_T	size;
	 unsigned long		xz2;
	 unsigned long		xz3;	
     unsigned long		magic_start; 
 };
size_t get_size_new(void *l){
	try{
		_chunk		*p;
		p=(_chunk*)(((char*)l)-sizeof(_chunk));
		return p->size;
	}catch(...){
		return  0 ;
	}
}

void Test(void *lp){
	printf("Size:%d\n",get_size_new(lp));
}

int _tmain(int argc, _TCHAR* argv[])
{
	
	char *a = new char[ 65 ];
	char *b = new char[ 10000 ];
	char *c = new char[ 122 ];

	Test(a);
	Test(b);
	Test(c);

	return  0 ;
}