mirror of
https://gitlab.com/libeigen/eigen.git
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3036eeca0a
release of tvmet (inactive for 2 years and developer unreachable) as the basis for eigen2, because it provides seemingly good expression template mechanisms, we want that, and it would take years to reinvent that wheel. We'll see. So this commit imports the last tvmet release.
69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
/*
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* Tiny Vector Matrix Library
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* Dense Vector Matrix Libary of Tiny size using Expression Templates
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*
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* Copyright (C) 2001 - 2003 Olaf Petzold <opetzold@users.sourceforge.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id: Io.h,v 1.3 2004/04/30 16:03:38 opetzold Exp $
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*/
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#ifndef TVMET_IO_H
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#define TVMET_IO_H
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namespace tvmet {
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/**
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* \class IoPrintHelper Io.h "tvmet/Io.h"
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* \brief Determines the number of digits regarding the sign of the
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* container.
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* This class is nesessary due to the complex type and the
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* function min(), which are not defined for this type.
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* So we have to dispatch between pod and complex types
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* to get an information about the extra space for signs.
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*/
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template<class C>
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class IoPrintHelper {
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IoPrintHelper();
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IoPrintHelper(const IoPrintHelper&);
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IoPrintHelper& operator=(const IoPrintHelper&);
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private:
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static std::streamsize width(const C& e) {
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std::streamsize w = static_cast<std::streamsize>(std::log10(max(abs(e)))+1);
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return w > 0 ? w : 0;
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}
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public:
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static std::streamsize width(dispatch<true>, const C& e) {
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return width(e);
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}
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static std::streamsize width(dispatch<false>, const C& e) {
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std::streamsize w = width(e);
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if(min(e) < 0) return w+1;
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else return w;
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}
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};
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};
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#endif /* TVMET_IO_H */
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// Local Variables:
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// mode:C++
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// End:
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