eightbyte

Eightbyte
===============

Javascript does not contain 64 bit operations....

Instead, the standard complies to a 64 bit floating point representation that gives 58 bits of precision in integers.

The functions include:
* add(a, b) :: Addition
* multiply(a, b) :: Multiplication
* shiftr(a, bits) :: Shift right
* shiftl(a, bits) :: Shift left
* rotl(a, bits) :: Rotate left
* where (a) or (b) are a 64 bit integer of format [nHigh, nLow]

$3

```js
var long = require('eightbyte');

var added = long.add([0xAABBCCDD, 0x0011FFEE], [0x00112233, 0x44556677]),
added_hex = added.hex();

var mult = long.multiply([0xAABBCCDD, 0x0011FFEE], [0x00112233, 0x44556677]),
mult_hex = mult.hex();

var shiftr = long.shiftr([0xAABBCCDD, 0x0011FFEE], 2),
shiftr_hex = shiftr.hex();

var shiftl = long.shiftl([0xAABBCCDD, 0x0011FFEE], 16),
shiftl_hex = shiftl.hex();

var rotl = long.rotl([0xAABBCCDD, 0x0011FFEE], 2),
rotl_hex = rotl.hex();

var rotr = long.rotr([0xAABBCCDD, 0x0011FFEE], 2),
rotr_hex = rotr.hex();
``

$3

By default, the functions return the array representation of the long ([32bit, 32bit]).

For hex formatting, use:

// returns 16 character hex representation as a string
var long = require('eightbyte');
var string_hex = long.add(first_long, second_long).hex();


Testing
===============

Install mocha and should using

npm install --dev

Note: npm 1.2.18 contains a bug that tries to install the development version of all devDependencies. Omit the --dev` option and it should work correctly.

Once everything is installed:

make test