wstring和string相互转换

wstring to string

std::string stows(std::wstring& ws)
{
	std::string curLocale = setlocale(LC_ALL, NULL); // curLocale = "C";
	setlocale(LC_ALL, "chs");
	const wchar_t* _Source = ws.c_str();
	size_t _Dsize = 2 * ws.size() + 1;
	char *_Dest = new char[_Dsize];
	memset(_Dest, 0, _Dsize);
	wcstombs(_Dest, _Source, _Dsize);
	std::string result = _Dest;
	delete[]_Dest;
	setlocale(LC_ALL, curLocale.c_str());
	return result;
}

string to wstring

std::wstring s2ws(const std::string& s)
{
	setlocale(LC_ALL, "chs");
	const char* _Source = s.c_str();
	size_t _Dsize = s.size() + 1;
	wchar_t *_Dest = new wchar_t[_Dsize];
	wmemset(_Dest, 0, _Dsize);
	mbstowcs(_Dest, _Source, _Dsize);
	std::wstring result = _Dest;
	delete[]_Dest;
	setlocale(LC_ALL, "C");
	return result;
}