132 lines
3.6 KiB
C++
132 lines
3.6 KiB
C++
|
/*
|
||
|
|
UtilFloorwrap(Test) - verify integer scale remainder wrapping
|
||
|
|
|
||
|
|
Copyright (C) Lumiera.org
|
||
|
|
2011, Hermann Vosseler <Ichthyostega@web.de>
|
||
|
|
|
||
|
|
This program is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU General Public License as
|
||
|
|
published by the Free Software Foundation; either version 2 of
|
||
|
|
the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
This program 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 General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with this program; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
|
|
||
|
|
* *****************************************************/
|
||
|
|
|
||
|
|
|
||
|
|
#include "lib/test/run.hpp"
|
||
|
|
#include "lib/util.hpp"
|
||
|
|
|
||
|
|
#include <cmath>
|
||
|
|
//#include <vector>
|
||
|
|
#include <iostream>
|
||
|
|
#include <boost/format.hpp>
|
||
|
|
|
||
|
|
using ::Test;
|
||
|
|
using std::cout;
|
||
|
|
//using std::rand;
|
||
|
|
using boost::format;
|
||
|
|
|
||
|
|
|
||
|
|
namespace util {
|
||
|
|
namespace test {
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
namespace{ // Test data and operations
|
||
|
|
|
||
|
|
div_t
|
||
|
|
floorwrap (int num, int den)
|
||
|
|
{
|
||
|
|
div_t res = div (num,den);
|
||
|
|
if (0 > (num^den) && res.rem)
|
||
|
|
{ // wrap similar to floor()
|
||
|
|
--res.quot;
|
||
|
|
res.rem = den - (-res.rem);
|
||
|
|
}
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void
|
||
|
|
showWrap (int val, int scale)
|
||
|
|
{
|
||
|
|
div_t wrap = floorwrap(val,scale);
|
||
|
|
cout << format ("% 3d /% 1d =% 1d %% =% d floor=% 4.1f wrap = (%2d,%2d) \n")
|
||
|
|
% val % scale % (val/scale)
|
||
|
|
% (val%scale) % floor(double(val)/scale)
|
||
|
|
% wrap.quot % wrap.rem;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
} // (End) test data and operations
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/**********************************************************************
|
||
|
|
* @test Evaluate a custom built integer floor function.
|
||
|
|
* This function is crucial for Lumiera's rule of quantisation
|
||
|
|
* of time values into frame intervals. This rule requires time
|
||
|
|
* points to be rounded towards the next lower frame border always,
|
||
|
|
* irrespective of the relation to the actual time origin.
|
||
|
|
* Contrast this to the built-in integer division operator, which
|
||
|
|
* truncates towards zero.
|
||
|
|
*
|
||
|
|
* @note if invoked with an non empty parameter, this test performs
|
||
|
|
* some interesting timing comparisons, which initially were
|
||
|
|
* used to tweak the implementation a bit.
|
||
|
|
* @see util.hpp
|
||
|
|
* @see QuantiserBasics_test
|
||
|
|
*/
|
||
|
|
class UtilFloorwrap_test : public Test
|
||
|
|
{
|
||
|
|
|
||
|
|
virtual void
|
||
|
|
run (Arg arg)
|
||
|
|
{
|
||
|
|
showWrap ( 12,4);
|
||
|
|
showWrap ( 11,4);
|
||
|
|
showWrap ( 10,4);
|
||
|
|
showWrap ( 9,4);
|
||
|
|
showWrap ( 8,4);
|
||
|
|
showWrap ( 7,4);
|
||
|
|
showWrap ( 6,4);
|
||
|
|
showWrap ( 5,4);
|
||
|
|
showWrap ( 4,4);
|
||
|
|
showWrap ( 3,4);
|
||
|
|
showWrap ( 2,4);
|
||
|
|
showWrap ( 1,4);
|
||
|
|
showWrap ( 0,4);
|
||
|
|
showWrap (- 1,4);
|
||
|
|
showWrap (- 2,4);
|
||
|
|
showWrap (- 3,4);
|
||
|
|
showWrap (- 4,4);
|
||
|
|
showWrap (- 5,4);
|
||
|
|
showWrap (- 6,4);
|
||
|
|
showWrap (- 7,4);
|
||
|
|
showWrap (- 8,4);
|
||
|
|
showWrap (- 9,4);
|
||
|
|
showWrap (-10,4);
|
||
|
|
showWrap (-11,4);
|
||
|
|
showWrap (-12,4);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
LAUNCHER (UtilFloorwrap_test, "unit common");
|
||
|
|
|
||
|
|
|
||
|
|
}} // namespace util::test
|