xxhash.jsx

Synopsis

JSX implementation of very fast hasing algorithm xxHash. It can use from any JavaScript environment (common.js(node.js), AMD, browser, etc).

This code is based on Pierrec's js-xxhash.

Code Example

Use from JSX

import "xxhash.jsx";
 
class _Main {
    static function main(argv : string[]) : void
    {
        var seed = 0xabcd;
        // single line way
        var hashStr : string = StringXXH.digestHex('input string', seed);
 
        // flexible way
        var hhx = new StringXXH(seed);
        hhx.update('first input string');
        hhx.update('second input string');
        var hashNum : number = hhx.digest();
        // or 
        var hashStr2 : string = hhx.digestHex();
    }
}

Use from node.js

var xxhash = require('xxhash.common.js');
var fs = require('fs');
 
var buffer = fs.readFileSync('inputfile.txt');
var hash = xxhash.XXH.digestHex(buffer, 0xabcd);
console.log(hash);

Use from require.js

// use xxhash.amd.js
define(['xxhash'], function (xxhash) {
    var hash = xxhash.XXH.digest('input string', 0x1111);
});

Use via global variables

<script src="xxhash.global.js" type="text/javascript"></script>
<script type="text/javascript">
window.onload = function () {
    alert(XXH.digestHex('content', 0xabcd));
});
</script> 

Installation

$ npm install xxhash.jsx

If you want to use this library from other JSX project, install like the following:

$ npm install xxhash.jsx --save-dev

API Reference for JS

For JavaScript environment, it provides entrypoint "XXH". It provides static methods to calculate XXHASH.

XXH.digest(input : string/ArrayBuffer/Uint8Array, seed : number) : number

It returns calculated hash value as number.

XXH.digestHex(input : string/ArrayBufferUint8Array, seed : number) : string

It returns calculated hash value as hex string.

API Reference for JSX

In addition to XXH class, there are two classes in this module;

• class StringXXH
• class ArrayBufferXXH

All classes have same methods. ArrayBufferXXH supports Uint8Array as input in addition to ArrayBuffer.

static function digest(input : inputtype, seed : number) : number

It returns calculated hash value as number.

static function digestHex(input : inputtype, seed : number) : string

It returns calculated hash value as hex string.

function constructor(seed : number)

Initialize hash calculator object.

function update(input : inputtype) : self

Add input. This method can be called multipul times.

function digest() : number

It returns calculated hash as number.

function digestHex() : string

It returns calculated hash as string.

function init(seed : number) : void

Initialize object content.

Development

JSX

Don't be afraid JSX! If you have an experience of JavaScript, you can learn JSX quickly.

• Static type system and unified class syntax.
• All variables and methods belong to class.
• JSX includes optimizer. You don't have to write tricky unreadalbe code for speed.
• You can use almost all JavaScript API as you know. Some functions become static class functions. See reference.

Setup

To create development environment, call following command:

$ npm install

Repository

• Repository: git://github.com/shibukawa.yoshiki/xxhash.jsx.git
• Issues: https://github.com/shibukawa.yoshiki/xxhash.jsx/issues

Run Test

$ grunt test

Build

$ grunt build

Generate API reference

$ grunt doc

Author

• shibukawa.yoshiki / [e-mail]

License

The MIT License (MIT)

Complete license is written in LICENSE.md.