ilMathBCMathAdapter Class Reference

Class ilMathBCMathAdapter. More...

Inheritance diagram for ilMathBCMathAdapter:

Collaboration diagram for ilMathBCMathAdapter:

Public Member Functions
	__construct ($scale=0)
	ilMathBcMathAdapter constructor. More...
	add ($left_operand, $right_operand, $scale=null)
	{Adds two numbers. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed } More...
	sub ($left_operand, $right_operand, $scale=null)
	{Subtracts two numbers. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed } More...
	mul ($left_operand, $right_operand, $scale=null)
	{Multiplies two numbers. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed } More...
	div ($left_operand, $right_operand, $scale=null)
	{Divides two numbers. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed Exceptions ilMathDivisionByZeroException } More...
	mod ($left_operand, $right_operand)
	{Gets modulus of two numbers. Parameters mixed $left_operand mixed $right_operand Returns mixed Exceptions ilMathDivisionByZeroException } More...
	pow ($left_operand, $right_operand, $scale=null)
	{Raises a number to another. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed } More...
	sqrt ($operand, $scale=null)
	{Gets the square root of a number. Parameters mixed $operand int $scale Returns mixed } More...
	comp ($left_operand, $right_operand, $scale=null)
	{Compares two numbers. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed } More...
Public Member Functions inherited from ilMathBaseAdapter
	applyScale ($number, $scale=null)
	This method adapts the behaviour of bcscale() More...
	round ($value, $precision=0)
	Parameters mixed $value int $precision Returns string More...
	equals ($left_operand, $right_operand, $scale=null)
	{Checks whether or not two numbers are identical. Parameters mixed $left_operand mixed $right_operand int $scale Returns bool } More...
	add ($left_operand, $right_operand, $scale=null)
	Adds two numbers. More...
	sub ($left_operand, $right_operand, $scale=null)
	Subtracts two numbers. More...
	mul ($left_operand, $right_operand, $scale=null)
	Multiplies two numbers. More...
	div ($left_operand, $right_operand, $scale=null)
	Divides two numbers. More...
	mod ($left_operand, $right_operand)
	Gets modulus of two numbers. More...
	pow ($left_operand, $right_operand, $scale=null)
	Raises a number to another. More...
	sqrt ($operand, $scale=null)
	Gets the square root of a number. More...
	comp ($left_operand, $right_operand, $scale=null)
	Compares two numbers. More...
	equals ($left_operand, $right_operand, $scale=null)
	Checks whether or not two numbers are identical. More...
	applyScale ($left_operand, $scale=null)
	round ($value, $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)
	Moved from ilMath... Converts numbers in the form "1.5e4" into decimal notation. More...

Detailed Description

Class ilMathBCMathAdapter.

Author

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

Definition at line 10 of file class.ilMathBCMathAdapter.php.

Constructor & Destructor Documentation

__construct()

ilMathBCMathAdapter::__construct

(

$scale = 0

)

ilMathBcMathAdapter constructor.

Parameters

int

$scale

Definition at line 16 of file class.ilMathBCMathAdapter.php.

    {
        bcscale($scale);
    }

Member Function Documentation

add()

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

{Adds two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 24 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,
			$scale = null
	)

{Compares two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 105 of file class.ilMathBCMathAdapter.php.

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

div()

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

{Divides two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

Exceptions

ilMathDivisionByZeroException

}

Implements ilMathAdapter.

Definition at line 48 of file class.ilMathBCMathAdapter.php.

    {
        if ($right_operand == 0) {
            require_once 'Services/Math/exceptions/class.ilMathDivisionByZeroException.php';
            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
	)

{Gets modulus of two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand

Returns

mixed

Exceptions

ilMathDivisionByZeroException

}

Implements ilMathAdapter.

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

    {
        if ($right_operand == 0) {
            require_once 'Services/Math/exceptions/class.ilMathDivisionByZeroException.php';
            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,
			$scale = null
	)

{Multiplies two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 40 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,
			$scale = null
	)

{Raises a number to another.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 74 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 $this->applyScale(pow($left_operand, $right_operand), $scale);
    }

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

Referenced by pow().

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sqrt()

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

{Gets the square root of a number.

Parameters

mixed	$operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 97 of file class.ilMathBCMathAdapter.php.

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

sub()

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

{Subtracts two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 32 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