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maths: add relatively_equal comparator

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Danny Robson 2018-03-20 13:32:24 +11:00
parent 84f8600f85
commit 5d02171a6f
1 changed files with 8 additions and 1 deletions
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9
maths.hpp
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@ -11,7 +11,7 @@
* See the License for the specific language governing permissions and * See the License for the specific language governing permissions and
* limitations under the License. * limitations under the License.
* *
* Copyright 2010-2014 Danny Robson <danny@nerdcruft.net> * Copyright 2010-2018 Danny Robson <danny@nerdcruft.net>
*/ */
#ifndef __MATHS_HPP #ifndef __MATHS_HPP
@ -81,6 +81,13 @@ namespace util {
/////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////
// Comparisons // Comparisons
inline bool inline bool
relatively_equal (float a, float b, float percentage)
{
return std::abs (1 - b / a ) < percentage;
}
//-------------------------------------------------------------------------
inline bool
almost_equal (float a, float b) almost_equal (float a, float b)
{ {
return ieee_single::almost_equal (a, b); return ieee_single::almost_equal (a, b);