ilMathBCMathAdapter Class Reference

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

Inheritance diagram for ilMathBCMathAdapter:

Collaboration diagram for ilMathBCMathAdapter:

Public Member Functions
	__construct ($scale=0)
	ilMathBcMathAdapter constructor. More...
	add ($left_operand, $right_operand, int $scale=null)
	@inheritDoc More...
	sub ($left_operand, $right_operand, int $scale=null)
	@inheritDoc More...
	mul ($left_operand, $right_operand, int $scale=null)
	@inheritDoc More...
	div ($left_operand, $right_operand, int $scale=null)
	@inheritDoc More...
	mod ($left_operand, $right_operand)
	@inheritDoc More...
	pow ($left_operand, $right_operand, int $scale=null)
	@inheritDoc More...
	sqrt ($operand, int $scale=null)
	@inheritDoc More...
	comp ($left_operand, $right_operand, int $scale=null)
	@inheritDoc More...
Public Member Functions inherited from ilMathBaseAdapter
	applyScale ($left_operand, int $scale=null)
	@inheritDoc More...
	round ($value, int $precision=0)
	@inheritDoc More...
	equals ($left_operand, $right_operand, int $scale=null)
	@inheritDoc More...
	add ($left_operand, $right_operand, int $scale=null)
	Adds two numbers. More...
	sub ($left_operand, $right_operand, int $scale=null)
	Subtracts two numbers. More...
	mul ($left_operand, $right_operand, int $scale=null)
	Multiplies two numbers. More...
	div ($left_operand, $right_operand, int $scale=null)
	Divides two numbers. More...
	mod ($left_operand, $right_operand)
	Gets modulus of two numbers. More...
	pow ($left_operand, $right_operand, int $scale=null)
	Raises a number to another. More...
	sqrt ($operand, int $scale=null)
	Gets the square root of a number. More...
	comp ($left_operand, $right_operand, int $scale=null)
	Compares two numbers. More...
	equals ($left_operand, $right_operand, int $scale=null)
	Checks whether or not two numbers are identical. More...
	applyScale ($left_operand, int $scale=null)
	This method adapts the behaviour of bcscale() More...
	round ($value, int $precision=0)

Additional Inherited Members
Protected Member Functions inherited from ilMathBaseAdapter
	normalize ($number)
	This function fixes problems which occur when locale ist set to de_DE for example, because bc* function expecting strings. More...
	exp2dec ($float_str)

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 Class ilMathBCMathAdapter

Author

Michael Jansen mjans.nosp@m.en@d.nosp@m.ataba.nosp@m.y.de

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

Constructor & Destructor Documentation

__construct()

ilMathBCMathAdapter::__construct

(

$scale = 0

)

ilMathBcMathAdapter constructor.

Parameters

int

$scale

Definition at line 29 of file class.ilMathBCMathAdapter.php.

    {
        bcscale($scale);
    }

Member Function Documentation

add()

ilMathBCMathAdapter::add	(		$left_operand,
			$right_operand,
		int	$scale = null
	)

@inheritDoc

Implements ilMathAdapter.

Definition at line 37 of file class.ilMathBCMathAdapter.php.

    {
        return bcadd($this->normalize($left_operand), $this->normalize($right_operand), $this->normalize($scale));
    }

References ilMathBaseAdapter\normalize().

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comp()

ilMathBCMathAdapter::comp	(		$left_operand,
			$right_operand,
		int	$scale = null
	)

@inheritDoc

Implements ilMathAdapter.

Definition at line 116 of file class.ilMathBCMathAdapter.php.

                                                                          : int
    {
        return bccomp($left_operand, $right_operand, $scale);
    }

div()

ilMathBCMathAdapter::div	(		$left_operand,
			$right_operand,
		int	$scale = null
	)

@inheritDoc

Implements ilMathAdapter.

Definition at line 61 of file class.ilMathBCMathAdapter.php.

    {
        if ($right_operand == 0) {
            throw new ilMathDivisionByZeroException(sprintf("Division of %s by %s not possible!", $left_operand, $right_operand));
        }
 
        return bcdiv($this->normalize($left_operand), $this->normalize($right_operand), $this->normalize($scale));
    }

References ilMathBaseAdapter\normalize().

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mod()

ilMathBCMathAdapter::mod	(		$left_operand,
			$right_operand
	)

@inheritDoc

Implements ilMathAdapter.

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

    {
        if ($right_operand == 0) {
            throw new ilMathDivisionByZeroException(sprintf("Division of %s by %s not possible!", $left_operand, $right_operand));
        }
 
        return bcmod($this->normalize($left_operand), $this->normalize($right_operand));
    }

References ilMathBaseAdapter\normalize().

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mul()

ilMathBCMathAdapter::mul	(		$left_operand,
			$right_operand,
		int	$scale = null
	)

@inheritDoc

Implements ilMathAdapter.

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

    {
        return bcmul($this->normalize($left_operand), $this->normalize($right_operand), $this->normalize($scale));
    }

References ilMathBaseAdapter\normalize().

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pow()

ilMathBCMathAdapter::pow	(		$left_operand,
			$right_operand,
		int	$scale = null
	)

@inheritDoc

Implements ilMathAdapter.

Definition at line 85 of file class.ilMathBCMathAdapter.php.

    {
        $left_operand = $this->normalize($left_operand);
        $right_operand = $this->normalize($right_operand);
        $scale = $this->normalize($scale);
 
        // bcpow() only supports exponents less than or equal to 2^31-1.
        // Also, bcpow() does not support decimal numbers.
        // If you have scale set to 0, then the exponent is converted to an integer; otherwise an error is generated.
        $left_operand_dec = $this->exp2dec($left_operand);
        $right_operand_dec = $this->exp2dec($right_operand);
 
        // bcpow does NOT support decimal exponents
        if (strpos($right_operand_dec, '.') === false) {
            return bcpow($left_operand_dec, $right_operand_dec, $scale);
        }
 
        return $this->applyScale($left_operand ** $right_operand, $scale);
    }

References ilMathBaseAdapter\applyScale(), ilMathBaseAdapter\exp2dec(), and ilMathBaseAdapter\normalize().

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sqrt()

ilMathBCMathAdapter::sqrt	(		$operand,
		int	$scale = null
	)

@inheritDoc

Implements ilMathAdapter.

Definition at line 108 of file class.ilMathBCMathAdapter.php.

    {
        return bcsqrt($operand, $scale);
    }

sub()

ilMathBCMathAdapter::sub	(		$left_operand,
			$right_operand,
		int	$scale = null
	)

@inheritDoc

Implements ilMathAdapter.

Definition at line 45 of file class.ilMathBCMathAdapter.php.

    {
        return bcsub($this->normalize($left_operand), $this->normalize($right_operand), $this->normalize($scale));
    }

References ilMathBaseAdapter\normalize().

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

• Services/Math/classes/class.ilMathBCMathAdapter.php