diff options
Diffstat (limited to 'sal')
| -rw-r--r-- | sal/inc/rtl/math.hxx | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sal/inc/rtl/math.hxx b/sal/inc/rtl/math.hxx index 2018308f9c6c..8f4991a378d0 100644 --- a/sal/inc/rtl/math.hxx +++ b/sal/inc/rtl/math.hxx @@ -263,6 +263,19 @@ inline bool approxEqual(double a, double b) < ((a < 0.0 ? -a : a) * (1.0 / (16777216.0 * 16777216.0))); } +/** Test equality of two values with an accuracy defined by nPrec + + @attention + approxEqual( value!=0.0, 0.0 ) _never_ yields true. + */ +inline bool approxEqual(double a, double b, sal_Int16 nPrec) +{ + if ( a == b ) + return true; + double x = a - b; + return (x < 0.0 ? -x : x) + < ((a < 0.0 ? -a : a) * (1.0 / (pow(2, nPrec)))); +} /** Add two values. If signs differ and the absolute values are equal according to approxEqual() |