Skip to content
master
Go to file
Code

Latest commit

 

Git stats

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
src
 
 
 
 
 
 
 
 
 
 
 
 

README.md

Numbase

Build Status SensioLabsInsight License Latest Stable Version Dependency Status Scrutinizer Code Quality Code Coverage Code Climate

Easily convert numbers between arbitrary bases and symbol sets.

Requirements

This library requires PHP >=5.3 (namespaces) and GMP extension (for handling large numbers exceeding PHP capabilities).

Installation

This library is available on Packagist as thunderer/numbase.

Usage

The Simplest Way™

use Thunder\Numbase\Numbase;

$numbase = Numbase::createDefault();

// decimal 15 to hexadecimal number
assert('F' === $numbase->convert(15, 10, 16));
// 64000 decimal to base 32000
assert('20' === $numbase->convert(64000, 10, 32000));

Regular usage (see Internals section for more options):

use Thunder\Numbase\Numbase;

$base62 = new Base62Symbols();
$numbase = new Numbase(new GmpConverter($base62), new StrictFormatter($base62));

// decimal 15 to hexadecimal number
assert('F' === $numbase->convert(15, 10, 16));

Showcase

Convert number to and from a different set of symbols:

$base10 = new Base10Symbols();
$upper = new StringSymbols('!@#$%^&*()');

$numbase = new Numbase(new GmpDigits($base10), new StrictFormatter($upper));

assert('#!' === $numbase->convert('20', 10, 10));
assert('-$!' === $numbase->convert('-30', 10, 10));

$numbase = new Numbase(new GmpDigits($upper), new StrictFormatter($base10));

assert('20' === $numbase->convert('#!', 10, 10));
assert('-30' === $numbase->convert('-$!', 10, 10));

Get array of digit values (for bases too large for any symbol set):

$numbase = new Numbase(new GmpDigits(new Base62Symbols()), new ArrayFormatter());

// convert 10^12 to base 99:
assert(array('10', '61', '53', '3', '51', '60', '10') 
    === $numbase->convert('10000000000000', 10, 99));

Internals

Numbase is built upon several concepts:

  • converters that convert numbers to array of numbers of digits,
  • formatters that take those arrays and return final numbers,
  • symbols used in converters to check symbols values and to get digits symbols in formatters.

There are several implementations of each concept bundled with this library, for example:

  • converters:
    • GmpConverter: can convert any integer between any base greater than 2, uses gmp_*() functions,
    • GmpStrvalConverter: uses gmp_strval() to convert between bases 2 and 62,
    • BaseConvertConverter: uses base_convert() to convert between bases 2 and 32,
  • formatters:
    • ArrayFormatter: returns raw array of digits numbers,
    • StrictFormatter: returns number as string, throws exception when digit is not found in symbols set,
    • FallbackFormatter: returns number as string, but returns string with digit values separated by configured separator when any digit is not found in symbols set,
  • symbols:
    • ArraySymbols: takes associative array(value => symbol),
    • Base62Symbols: contains alphanumeric set of symbols 0-9A-Za-z up to base 62,
    • StringSymbols: takes string and splits it assigning consecutive values to each character.

The named constructor Numbase::createDefault() uses GmpConverter, StrictFormatter and Base62Symbols as defaults.

License

See LICENSE file in the main directory of this library.

You can’t perform that action at this time.