utility/numutil.h File Reference
#include <cmath>#include <cfloat>#include <limits>
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Defines | |
| #define | M_PI 3.14159265358979323846 |
| #define | M_E 2.7182818284590452353 |
Functions | |
| template<class T > | |
| bool | isNaN (T value) |
| template<typename T > | |
| bool | isInfinity (T value) |
| template<class T > | |
| bool | isClose (T a, T b, T tolerance) |
| bool | almostEqual (float x, float y, float epsilon=FLT_EPSILON) |
| bool | almostEqual (double x, double y, double epsilon=DBL_EPSILON) |
| bool | almostEqual (long double x, long double y, long double epsilon=LDBL_EPSILON) |
Variables | |
| const int | WORD_LENGTH = 32 |
| const double | LN2 = 0.69314718055994528622676 |
| const unsigned long | LN2BYTES = 0xB1721814 |
| const double | NATURAL_E = 2.718281828459045 |
Define Documentation
| #define M_E 2.7182818284590452353 |
Referenced by Func::Func(), FuncTerm::FuncTerm(), Function::Function(), Function::operator=(), and Func::operator=().
| #define M_PI 3.14159265358979323846 |
Referenced by calcSurf(), Func::Func(), FuncTerm::FuncTerm(), Function::Function(), Function::operator=(), and Func::operator=().
Function Documentation
| bool almostEqual | ( | long double | x, | |
| long double | y, | |||
| long double | epsilon = LDBL_EPSILON | |||
| ) |
| bool almostEqual | ( | double | x, | |
| double | y, | |||
| double | epsilon = DBL_EPSILON | |||
| ) |
| bool almostEqual | ( | float | x, | |
| float | y, | |||
| float | epsilon = FLT_EPSILON | |||
| ) |
Referenced by Interpol::setXmax(), and Interpol::setXmin().
template<class T >
| bool isClose | ( | T | a, | |
| T | b, | |||
| T | tolerance | |||
| ) | [inline] |
Check 2 floating-point numbers for "equality". Algorithm (from Knuth) 'a' and 'b' are close if: | ( a - b ) / a | < e AND | ( a - b ) / b | < e where 'e' is a small number.
In this function, 'e' is computed as: e = tolerance * machine-epsilon
template<typename T >
| bool isInfinity | ( | T | value | ) | [inline] |
template<class T >
| bool isNaN | ( | T | value | ) | [inline] |
Functions for floating point comparisons
Referenced by SteadyState::classifyState().
Variable Documentation
| const double LN2 = 0.69314718055994528622676 |
| const unsigned long LN2BYTES = 0xB1721814 |
| const double NATURAL_E = 2.718281828459045 |
| const int WORD_LENGTH = 32 |
