00001 // Copyright (C) 2006 EPITA Research and Development Laboratory 00002 // 00003 // This file is part of the Olena Library. This library is free 00004 // software; you can redistribute it and/or modify it under the terms 00005 // of the GNU General Public License version 2 as published by the 00006 // Free Software Foundation. 00007 // 00008 // This library is distributed in the hope that it will be useful, 00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00011 // General Public License for more details. 00012 // 00013 // You should have received a copy of the GNU General Public License 00014 // along with this library; see the file COPYING. If not, write to 00015 // the Free Software Foundation, 51 Franklin Street, Fifth Floor, 00016 // Boston, Boston, MA 02110-1301, USA. 00017 // 00018 // As a special exception, you may use this file as part of a free 00019 // software library without restriction. Specifically, if other files 00020 // instantiate templates or use macros or inline functions from this 00021 // file, or you compile this file and link it with other files to 00022 // produce an executable, this file does not by itself cause the 00023 // resulting executable to be covered by the GNU General Public 00024 // License. This exception does not however invalidate any other 00025 // reasons why the executable file might be covered by the GNU General 00026 // Public License. 00027 00028 #ifndef OLENA_CONVERT_FLOAT_CMP_HH 00029 # define OLENA_CONVERT_FLOAT_CMP_HH 00030 00031 # include <cmath> 00032 # include <cfloat> 00033 00034 namespace oln { 00035 00036 namespace convert { 00037 00040 inline bool 00041 approx_eq(float x, float y) 00042 { 00043 return std::abs(x - y) <= FLT_EPSILON; 00044 } 00045 00048 inline bool 00049 approx_neq(float x, float y) 00050 { 00051 return std::abs(x - y) > FLT_EPSILON; 00052 } 00053 00054 } // end of namespace convert 00055 00056 } // end of namespace oln 00057 00058 #endif // OLENA_CONVERT_FLOAT_CMP_HH