elshort.h

《3D游戏引擎设计》的源码

#ifndef ELSHORT_H
#define ELSHORT_H

#include "element.h"

class mgcShort : public mgcElement
{
// object information
public:
	mgcShort () : mgcElement(type,&value)
		{ value = 0; }
	mgcShort (const short& _value) : mgcElement(type,&value)
		{ value = _value; }
	mgcShort (const mgcElement& element) : mgcElement(type,&value)
		{ *this = element; }

	operator short () const
		{ return value; }

	mgcShort& operator= (short _value)
		{ value = _value;  return *this; }
	mgcShort& operator= (const mgcShort& derived)
		{ value = derived.value;  return *this; }
	mgcShort& operator= (const mgcElement& element);

	int operator== (const mgcShort& derived) const
		{ return value == derived.value; }
	int operator!= (const mgcShort& derived) const
		{ return value != derived.value; }

	friend istream& operator>> (istream& istr, mgcShort& derived)
		{ return istr >> derived.value; }
	friend ostream& operator<< (ostream& ostr, const mgcShort& derived)
		{ return ostr << derived.value; }

private:
	short value;

// class information
public:
	static const char* description;
	static const int type;
	static const int size;

	static int Register ();
	static void ToChar   (int quantity, void* src, void* trg);
	static void ToUchar  (int quantity, void* src, void* trg);
	static void ToShort  (int quantity, void* src, void* trg);
	static void ToUshort (int quantity, void* src, void* trg);
	static void ToInt    (int quantity, void* src, void* trg);
	static void ToUint   (int quantity, void* src, void* trg);
	static void ToLong   (int quantity, void* src, void* trg);
	static void ToUlong  (int quantity, void* src, void* trg);
	static void ToFloat  (int quantity, void* src, void* trg);
	static void ToDouble (int quantity, void* src, void* trg);

	static void Input (istream& istr, void* trg)
		{ istr >> *(short*)trg; }
	static void Output (ostream& ostr, const void* src)
		{ ostr << *(short*)src; }

// error handling
public:
	static int verbose;
	static unsigned error;
	static void Report (ostream& ostr);
private:
    static const unsigned registration_failed;
    static const char* message[1];
    static int Number (unsigned single_error);
    static void Report (unsigned single_error);
};

static int mgcShort_key = mgcShort::Register();

#endif