gries/number-system

A php library to deal with dynamic number systems and conversion

dev-master 2015-01-10 18:12 UTC

Requires

• ext-gmp: *

Requires (Dev)

• phpspec/phpspec: ~2.1

MIT

• Christoph Rosse

• system
• numeric

README

This PHP-Library can be used to make simple calculations with dynamic number-systems.

Installation

Number-System can be installed via. Composer:

composer require "gries/number-system"

Usage

Simple

use gries\NumberSystem\HexadecimalSystem;
use gries\NumberSystem\Number;

require_once __DIR__.'/../vendor/autoload.php';

$number = new Number(15); // the default system is decimal
$hexNumber = new Number('FF', new HexadecimalSystem());

echo $number->add($hexNumber)->value(); // 270 (15 + 255)
echo $hexNumber->add($number)->value(); // 10E (F + FF)

Custom Number System

use gries\NumberSystem\Number;
use gries\NumberSystem\NumberSystem;

require_once __DIR__.'/../vendor/autoload.php';

$elementalSystem = new NumberSystem(['earth', 'fire', 'air', 'water'], '-');

// diffrent ways of creating a number
$number = new Number('fire-earth', $elementalSystem); // 4
$largerNumber = $elementalSystem->buildNumber(['fire', 'air', 'air']); // 26

// define your own number system and number
class YoloSystem extends NumberSystem
{
    public function __construct()
    {
        parent::__construct(['1337', 'yolo', 'swag'], '¿');
    }
}

class YoloNumber extends Number
{
    public function __construct($value)
    {
        parent::__construct($value, new YoloSystem());
    }
}

$foo = new YoloNumber('yolo¿swag¿yolo¿yolo¿yolo¿yolo¿swag');
echo $foo->asDecimalString(); // 1337

Converting Mathematical Expressions

You can use the ExpressionConverter to convert mathematical expressions from one system to another.

$decimal           = new NumberSystem();
$binary            = new BinaryNumberSystem();
$converter         = new ExpressionConverter();
$decimalExpression = new Expression('(1337 * 7) + sin(5)-2', $decimal);

echo $converter->convert($decimalExpression, $binary); // -> (10100111001 * 111) + sin(101)-10

Current limitations aka todo's

• No support for negative numbers
• No support of floating point numbers
• Division always rounds to 0 because ... no floating point number support ;)

Running the tests

vendor/bin/phpspec run

Contribute!

Feel free to give me feedback/feature-request/bug-reports via. github issues. Or just send me a pull-request :)

Author

• Christoph Rosse

License

For the full copyright and license information, please view the LICENSE file that was distributed with this source code.