ICRS Eurobot 2013
Dependencies: mbed mbed-rtos Servo QEI
Diff: tvmet/Io.h
- Revision:
- 15:9c5aaeda36dc
diff -r c638d4b9ee94 -r 9c5aaeda36dc tvmet/Io.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tvmet/Io.h Sat Apr 06 20:57:54 2013 +0000 @@ -0,0 +1,69 @@ +/* + * Tiny Vector Matrix Library + * Dense Vector Matrix Libary of Tiny size using Expression Templates + * + * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * $Id: Io.h,v 1.8 2007-06-23 15:58:58 opetzold Exp $ + */ + +#ifndef TVMET_IO_H +#define TVMET_IO_H + +namespace tvmet { + +/** + * \class IoPrintHelper Io.h "tvmet/Io.h" + * \brief Determines the number of digits regarding the sign of the + * container. + * This class is nesessary due to the complex type and the + * function min(), which are not defined for this type. + * So we have to dispatch between pod and complex types + * to get an information about the extra space for signs. + */ +template<class C> +class IoPrintHelper { + IoPrintHelper(); + IoPrintHelper(const IoPrintHelper&); + IoPrintHelper& operator=(const IoPrintHelper&); + +private: + static std::streamsize width(const C& e) { + std::streamsize w = static_cast<std::streamsize>(std::log10(max(abs(e)))+1); + return w > 0 ? w : 0; + } + +public: + static std::streamsize width(dispatch<true>, const C& e) { + return width(e); + } + static std::streamsize width(dispatch<false>, const C& e) { + std::streamsize w = width(e); + if(min(e) < 0) return w+1; + else return w; + } +}; + + +} + +#endif /* TVMET_IO_H */ + +// Local Variables: +// mode:C++ +// tab-width:8 +// End: