ilMath Class Reference

This file is part of ILIAS, a powerful learning management system published by ILIAS open source e-Learning e.V. More...

Collaboration diagram for ilMath:

Static Public Member Functions
static	_add ($left_operand, $right_operand, int $scale=50)
static	_div ($left_operand, $right_operand, int $scale=50)
static	_mod ($operand, $modulu)
static	_mul ($left_operand, $right_operand, int $scale=50)
static	_pow ($left_operand, $right_operand, int $scale=50)
static	_sqrt ($operand, int $scale=50)
static	_sub ($left_operand, $right_operand, int $scale=50)
static	isCoprimeFraction ($numerator, $denominator)
static	getGreatestCommonDivisor ($a, $b)
static	setDefaultAdapter (ilMathAdapter $adapter)
static	getDefaultAdapter ()
static	getInstance (?string $adapter=null)
static	getFirstValidAdapter ()
static	__callStatic (string $method, $args)
	Backward compatibility: Map all static calls to an equivalent instance method of the adapter. More...

Static Protected Attributes
static ilMathAdapter	$default_adapter = null

Detailed Description

This file is part of ILIAS, a powerful learning management system published by ILIAS open source e-Learning e.V.

ILIAS is licensed with the GPL-3.0, see https://www.gnu.org/licenses/gpl-3.0.en.html You should have received a copy of said license along with the source code, too.

If this is not the case or you just want to try ILIAS, you'll find us at: https://www.ilias.de https://github.com/ILIAS-eLearning static _round(mixed $value, int $precision) : string static _equals(mixed $left_operand, mixed $right_operand, int $scale = null) : bool

Definition at line 23 of file class.ilMath.php.

Member Function Documentation

__callStatic()

static ilMath::__callStatic ( string  $method,   $args  )

static

Backward compatibility: Map all static calls to an equivalent instance method of the adapter.

Parameters

string	$method
mixed	$args

Returns

mixed

Definition at line 184 of file class.ilMath.php.

    {
        if (strpos($method, '_') === 0) {
            $method = substr($method, 1);
        }

        $adapter = static::getDefaultAdapter();

        return call_user_func_array([$adapter, $method], $args);
    }

_add()

static ilMath::_add (   $left_operand,   $right_operand, int  $scale = 50  )

static

Parameters

int | float	$left_operand
int | float	$right_operand

Returns

mixed

Definition at line 32 of file class.ilMath.php.

Referenced by assFormulaQuestionVariable\getRandomValue(), assFormulaQuestionResult\isInTolerance(), and EvalMath\pfx().

    {
        return static::getDefaultAdapter()->add($left_operand, $right_operand, $scale);
    }

Here is the caller graph for this function:

_div()

static ilMath::_div (   $left_operand,   $right_operand, int  $scale = 50  )

static

Parameters

int | float	$left_operand
int | float	$right_operand

Returns

mixed

Exceptions

ilMathDivisionByZeroException

Definition at line 43 of file class.ilMath.php.

Referenced by assFormulaQuestionResult\calculateFormula(), assFormulaQuestion\getBestSolution(), assFormulaQuestionVariable\getRandomValue(), assFormulaQuestionResult\getReachedPoints(), assFormulaQuestionResult\isCorrect(), assFormulaQuestionResult\isInTolerance(), EvalMath\pfx(), and assFormulaQuestionResult\suggestRange().

    {
        return static::getDefaultAdapter()->div($left_operand, $right_operand, $scale);
    }

Here is the caller graph for this function:

_mod()

static ilMath::_mod (   $operand,   $modulu  )

static

Parameters

int | float	$operand
int | float	$modulu

Exceptions

ilMathDivisionByZeroException

Definition at line 53 of file class.ilMath.php.

                                                  : int
    {
        return static::getDefaultAdapter()->mod($operand, $modulu);
    }

_mul()

static ilMath::_mul (   $left_operand,   $right_operand, int  $scale = 50  )

static

Parameters

int | float	$left_operand
int | float	$right_operand

Returns

mixed

Definition at line 63 of file class.ilMath.php.

Referenced by assFormulaQuestionVariable\getBaseValue(), assFormulaQuestionVariable\getRandomValue(), assFormulaQuestionResult\getRangeMaxBase(), assFormulaQuestionResult\getRangeMinBase(), assFormulaQuestionResult\getReachedPoints(), assFormulaQuestionResult\getResultInfo(), assFormulaQuestionResult\isCorrect(), assFormulaQuestionResult\isInTolerance(), EvalMath\pfx(), and assFormulaQuestionResult\suggestRange().

    {
        return static::getDefaultAdapter()->mul($left_operand, $right_operand, $scale);
    }

Here is the caller graph for this function:

_pow()

static ilMath::_pow (   $left_operand,   $right_operand, int  $scale = 50  )

static

Parameters

int | float	$left_operand
int | float	$right_operand

Returns

mixed

Definition at line 73 of file class.ilMath.php.

Referenced by assFormulaQuestionVariable\getRandomValue(), and EvalMath\pfx().

    {
        return static::getDefaultAdapter()->pow($left_operand, $right_operand, $scale);
    }

Here is the caller graph for this function:

_sqrt()

static ilMath::_sqrt (   $operand, int  $scale = 50  )

static

Parameters

int | float

$operand

Returns

mixed

Definition at line 82 of file class.ilMath.php.

    {
        return static::getDefaultAdapter()->sqrt($operand, $scale);
    }

_sub()

static ilMath::_sub (   $left_operand,   $right_operand, int  $scale = 50  )

static

Parameters

int | float	$left_operand
int | float	$right_operand

Returns

mixed

Definition at line 92 of file class.ilMath.php.

Referenced by assFormulaQuestionVariable\getRandomValue(), assFormulaQuestionResult\isInTolerance(), and EvalMath\pfx().

    {
        return static::getDefaultAdapter()->sub($left_operand, $right_operand, $scale);
    }

Here is the caller graph for this function:

getDefaultAdapter()

static ilMath::getDefaultAdapter ( )

static

Definition at line 127 of file class.ilMath.php.

References null.

                                              : ilMathAdapter
    {
        if (null === static::$default_adapter) {
            static::$default_adapter = static::getFirstValidAdapter();
        }

        return static::$default_adapter;
    }

getFirstValidAdapter()

static ilMath::getFirstValidAdapter ( )

static

Exceptions

ilMathException

Definition at line 169 of file class.ilMath.php.

                                                 : ilMathAdapter
    {
        if (extension_loaded('bcmath')) {
            return static::getInstance('BCMath');
        }

        return static::getInstance('Php');
    }

getGreatestCommonDivisor()

static ilMath::getGreatestCommonDivisor (   $a,   $b  )

static

Parameters

int | float	$a
int | float	$b

Returns

int|float

Definition at line 113 of file class.ilMath.php.

References Vendor\Package\$a, and Vendor\Package\$b.

Referenced by ilMathTest\testGcd().

    {
        if ($b > 0) {
            return self::getGreatestCommonDivisor($b, $a % $b);
        }

        return $a;
    }

Here is the caller graph for this function:

getInstance()

static ilMath::getInstance ( ?string  $adapter = null )

static

Exceptions

ilMathException

Definition at line 139 of file class.ilMath.php.

References null.

                                                               : \ilMathAdapter
    {
        if (null === $adapter) {
            return static::getFirstValidAdapter();
        }

        $class_name = 'ilMath' . $adapter . 'Adapter';
        $path_to_class = __DIR__ . '/class.' . $class_name . '.php';

        if (!is_file($path_to_class) || !is_readable($path_to_class)) {
            throw new ilMathException(sprintf(
                'The math adapter %s is not valid, please refer to a class implementing %s',
                $adapter,
                ilMathAdapter::class
            ));
        }
        if (!class_exists($class_name) || !is_subclass_of($class_name, ilMathAdapter::class)) {
            throw new ilMathException(sprintf(
                'The math adapter class %s is not valid, please refer to a class implementing %s',
                $class_name,
                ilMathAdapter::class
            ));
        }

        return new $class_name();
    }

isCoprimeFraction()

static ilMath::isCoprimeFraction (   $numerator,   $denominator  )

static

Parameters

int | float	$numerator
int | float	$denominator

Definition at line 101 of file class.ilMath.php.

                                                                      : bool
    {
        $gcd = self::getGreatestCommonDivisor(abs($numerator), abs($denominator));

        return $gcd == 1;
    }

setDefaultAdapter()

static ilMath::setDefaultAdapter ( ilMathAdapter  $adapter )

static

Definition at line 122 of file class.ilMath.php.

Referenced by ilMathBaseAdapterTestCase\setUp().

                                                                    : void
    {
        static::$default_adapter = $adapter;
    }

Here is the caller graph for this function:

Field Documentation

$default_adapter

ilMathAdapter ilMath::$default_adapter = null

staticprotected

Definition at line 25 of file class.ilMath.php.

---

The documentation for this class was generated from the following file:

• components/ILIAS/Math/classes/class.ilMath.php