74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004-2007, University in Hagen, Faculty of Mathematics and
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Computer Science, Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO 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 SECONDO; 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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1 Header File: AlmostEqual
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This file defines several different methods to test float values on whether they
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are semantically equal and selects the standard method for more complex ones
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(as for Points, Units, etc.).
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The implementation and the standard tolerance factors are located in
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file ``../Tools/Utilities/AlmostEqual.cpp''.
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*/
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#ifndef ALMOSTEQUAL_H
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#define ALMOSTEQUAL_H
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#include <stdint.h>
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double getAlmostEqualFactor();
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int64_t getAlmostEqualDeltaNumbers();
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const double FACTOR = getAlmostEqualFactor();// Precision factor. Maximun
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// tolerated absolute difference
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// between "equal" float numbers.
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// used by AlmostEqualAbsolute()
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const int64_t DELTA_NUMBERS = getAlmostEqualDeltaNumbers();
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inline double getAlmostEqualFACTOR(){
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return FACTOR;
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}
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inline int64_t getAlmostEqualDELTA_NUMBERS(){
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return DELTA_NUMBERS;
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}
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// standard methode
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bool AlmostEqual( const double &d1, const double &d2 );
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// Using absolute difference
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bool AlmostEqualAbsolute( const double &d1,
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const double &d2, const double &epsilon);
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// Using distance in number of separating prepresentable in-between values
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bool AlmostEqual2sComplement( const double &A,
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const double &B, const int64_t &maxUlps );
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bool AlmostEqual_CheckTypeSizes();
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#endif
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