使用Unicode写文本文件：一个简单类的示例

参考了http://forums.codeguru.com/showthread.php?457106-Unicode-text-file示例。

class WOFSTREAM : public std::ofstream
{
public:
	WOFSTREAM()
	{
	}
	WOFSTREAM(const wchar_t *path)
	{
		
		setlocale(LC_ALL,"");
		size_t sz=-1;
		char szPath[MAX_PATH]={0};
		wcstombs_s(&sz,szPath,sizeof(szPath),path,_TRUNCATE);
		
		cout<<szPath<<"\n";
		open(szPath,ios::binary);//注意此处如不指定binary,ostream对象被默认视为对文本进行操作，会额外在行末添加字符：0x0D
		this->WriteBOM();
		setlocale(LC_ALL,"C");
	}
	WOFSTREAM& operator <<(const wchar_t* text)
	{
		const char *pData = (const char *)text;
		const unsigned int length = wcslen(text) * sizeof(text[0]);
		write(pData, length);
		return *this;
	} 
	WOFSTREAM& operator <<(unsigned short ch)
	{
		const char *pData = (char *)&ch;
		const unsigned int length = sizeof(ch);
		write(pData, length);
		return *this;
	} 
	WOFSTREAM& operator<<(WOFSTREAM& (*pfunc)(WOFSTREAM&))
	{
		return ((*pfunc)(*this));
	}
protected:
	void WriteBOM()
	{
		const static wchar_t BOM = 0xfeff;
		write((const char *)&BOM, sizeof(BOM));
	}
};
WOFSTREAM& endl(WOFSTREAM& wf)//重载换行符
{
	wf<<0x000D<<0x000A;
	return wf;
}
//使用：
int __cdecl main()
{
	WOFSTREAM wf2(L"xx2.txt");
	if (wf2.good())
	{
		wf2<<L"一个世界一个梦想"<<endl;
		wf2<<L"one world one dream";
		wf2.flush();
		wf2.close();
	}
	else
	{
		cout<<"bad!"<<endl;
	}
getchar();
return 1;
}