103 lines
3.1 KiB
C++
103 lines
3.1 KiB
C++
/*
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UtilFloorwrap(Test) - verify integer scale remainder wrapping
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Copyright (C) Lumiera.org
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2011, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include "lib/test/run.hpp"
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#include "lib/test/test-helper.hpp"
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#include "lib/util.hpp"
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#include <cmath>
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#include <iostream>
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#include <boost/format.hpp>
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#include <boost/lexical_cast.hpp>
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using ::Test;
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using std::cout;
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using std::endl;
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using boost::format;
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using boost::lexical_cast;
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using lib::test::showType;
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namespace util {
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namespace test {
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/***************************************************************************
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* @test Verify a custom built integer scale division and wrapping function.
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* This function is relevant for decimating values into a given scale,
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* like splitting time measurements in hours, minutes, seconds etc.
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* Basically, in Lumiera the quantisation into a scale is always
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* done with the same orientation, irrespective of the zero point
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* on the given scale. Contrast this to the built-in integer
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* division and modulo operators working symmetrical to zero.
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* @see util.hpp
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* @see TimeFormats_test
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*/
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class UtilFloorwrap_test : public Test
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{
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virtual void
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run (Arg arg)
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{
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int range = 0 < arg.size()? lexical_cast<int> (arg[0]) : 12;
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int scale = 1 < arg.size()? lexical_cast<int> (arg[1]) : 4;
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checkWrap (range, scale);
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checkWrap (range, -scale);
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checkWrap<long> (range, scale);
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checkWrap<long> (range, -scale);
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}
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template<typename I>
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void
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checkWrap (I range, I scale)
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{
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cout << "--------"<< showType<I>()
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<< "--------"<< range<<"/"<<scale<<endl;
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for (I i=range; i >=-range; --i)
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showWrap (i, scale);
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}
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template<typename I>
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void
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showWrap (I val, I scale)
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{
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IDiv<I> wrap = floorwrap(val,scale);
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cout << format ("% 3d /% 1d =% 1d %% =% d floor=% 4.1f wrap = (%2d,%2d)\n")
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% val % scale % (val/scale)
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% (val%scale) % floor(double(val)/scale)
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% wrap.quot % wrap.rem;
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}
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};
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LAUNCHER (UtilFloorwrap_test, "unit common");
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}} // namespace util::test
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