class StringConv {
	public:
	char* cbuf = NULL;
	size_t cbuf_size = 0;
	WCHAR* wbuf = NULL;
	size_t wbuf_size = 0;
	StringConv() {
		//
	}
	LPCWSTR wget(size_t size) {
		if (wbuf_size < size) {
			if (wbuf != NULL) delete wbuf;
			wbuf = new WCHAR[size];
			wbuf_size = size;
		}
		return wbuf;
	}
	LPCWSTR proc(char* src, int cp = CP_UTF8) {
		size_t size = MultiByteToWideChar(cp, 0, src, -1, NULL, 0);
		LPCWSTR buf = wget(size);
		MultiByteToWideChar(cp, 0, src, -1, wbuf, size);
		return wbuf;
	}
	char* get(size_t size) {
		if (cbuf_size < size) {
			if (cbuf != NULL) delete cbuf;
			cbuf = new char[size];
			cbuf_size = size;
		}
		return cbuf;
	}
	char* proc(LPCWSTR src, int cp = CP_UTF8) {
		size_t size = WideCharToMultiByte(cp, 0, src, -1, NULL, 0, NULL, NULL);
		char* buf = get(size);
		WideCharToMultiByte(cp, 0, src, -1, buf, size, NULL, NULL);
		return buf;
	}
}