s-binary

s-binary

Work in progress

Usage example

var binary = require('s-binary');

binary.toInt('11001100'); // returns 204

// 8bit 5 - 9
var five = binary.toBinary(5, 8); // '00000101'
var nine = binary.toBinary(9, 8); // '00001001'
var negativeNine = binary.complement(nine); // '11110111'
var sum = binary.add(five, negativeNine); // '11111100'
var checkAnswer = binary.complement(sum); // '00000100'

binary.toInt(checkAnswer); // 4

Installation

npm install --save s-binary

Available methods

This module assumes big-endian byte order

Unit conversion

binary to integer

binary.toInt('11001100'); // returns 204

binary to hex

binary.toHex('11001100'); // returns 'cc'

binary to Unicode

binary.toUnicode('0110100001101001'); // returns 'hi'

string/integer/buffer to binary

binary.toBinary(204); // returns '11001100'
binary.toBinary('foo'); // returns '011001100110111101101111'

Arithmetic

Simple addition

binary.add('111', '1'); // returns '1000'

Bit addition

binary.addBits('1', '1'); // returns ['0', '1']
// ------------------------------- sum ^ -- ^ carry

Multiplication

binary.multiply('1010', '10'); // returns '10100'
//            10 ^     2 ^              20 ^

Division

binary.divide('1010', '101'); // returns '10'
//          10 ^     5 ^                2 ^

Logic

NOT

binary.not('1011'); // returns '0100'

AND

binary.and('101', '110'); // returns '100'

OR

binary.or('101', '110'); // returns '111'

XOR

binary.xor('101', '110'); // returns '011'

NAND

binary.nand('101', '110'); // returns '011'

NOR

binary.nor('101', '110'); // returns '000'

Two's complement

binary.complement('00000101'); // returns '11111011'

Helper methods

(Left) pad

binary.pad('01', 4); // returns '0001' (left pad)

Equalize lengths by padding shorter value

binary.equalize('11', '0001'); // returns ['0011', '0001']

Split

binary.split('1111111100000000', 8); // returns ['11111111', '00000000']

LSB (get least significant bits)

Last bit from each byte. Note: bytes can be of any length.

var data = ['01000100', '11001100', '01010101'];
binary.lsb(data); // returns '001'