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32
LICENSE
32
LICENSE
|
@ -1,3 +1,32 @@
|
|||
At your option you may choose either of the following licenses:
|
||||
|
||||
* The MIT License (MIT)
|
||||
* The Apache License 2.0 (Apache-2.0)
|
||||
|
||||
|
||||
The MIT License (MIT)
|
||||
|
||||
Copyright (c) 2015 AJ ONeal
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in all
|
||||
copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
SOFTWARE.
|
||||
|
||||
|
||||
Apache License
|
||||
Version 2.0, January 2004
|
||||
http://www.apache.org/licenses/
|
||||
|
@ -186,7 +215,7 @@
|
|||
same "printed page" as the copyright notice for easier
|
||||
identification within third-party archives.
|
||||
|
||||
Copyright {yyyy} {name of copyright owner}
|
||||
Copyright 2015 AJ ONeal
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
|
@ -199,4 +228,3 @@
|
|||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
|
||||
|
|
62
README.md
62
README.md
|
@ -1,7 +1,7 @@
|
|||
Unibabel
|
||||
==========
|
||||
========
|
||||
|
||||
Base64, TypedArrays, and UTF-8 / Unicode conversions in Browser (and Node) JavaScript
|
||||
Minimalistic **Base64**, **TypedArrays**, and **UTF-8** / **Unicode** conversions in Browser (and Node) JavaScript. Optional add-on support for **hex** and **base32**.
|
||||
|
||||
See <https://coolaj86.com/articles/base64-unicode-utf-8-javascript-and-you/>
|
||||
|
||||
|
@ -14,6 +14,41 @@ See also
|
|||
* [TextEncoderLite (based on text-encoding)](https://github.com/coolaj86/TextEncoderLite/tree/lite)
|
||||
* [Beatgammit's base64-js](https://github.com/beatgammit/base64-js)
|
||||
|
||||
Are you in the right place?
|
||||
------------------------
|
||||
|
||||
Dear Node.js Users:
|
||||
|
||||
You SHOULD NOT use this module. You already have [`Buffer`](https://nodejs.org/api/buffer.html) and [`thirty-two`](https://github.com/chrisumbel/thirty-two):
|
||||
|
||||
```javascript
|
||||
var buf = new Buffer('I ½ ♥ 💩', 'utf8');
|
||||
buf.toString('hex');
|
||||
buf.toString('base64');
|
||||
buf.toString('ascii');
|
||||
buf.toString('utf8');
|
||||
buf.toString('binary'); // deprecated, do not use
|
||||
```
|
||||
|
||||
Install
|
||||
-------
|
||||
|
||||
You just include the `index.js` in a lovely script tag.
|
||||
|
||||
```bash
|
||||
bower install --save unibabel
|
||||
```
|
||||
|
||||
```html
|
||||
<script src="/bower_components/unibabel/index.js"></script>
|
||||
```
|
||||
|
||||
Dear WebPack / Broccoli, Gulp / Grunt Users:
|
||||
|
||||
I don't know how your build systems work these days,
|
||||
but Unibabel is exported as `Unibabel`
|
||||
and you can access it as `window.Unibabel`.
|
||||
|
||||
API
|
||||
===
|
||||
|
||||
|
@ -29,12 +64,12 @@ var uint8Array = Unibabel.base64ToArr(base64)
|
|||
|
||||
**Normal APIs**
|
||||
|
||||
`index.js`
|
||||
|
||||
* utf8ToBuffer(utf8str) => array
|
||||
* bufferToUtf8(array) => string
|
||||
|
||||
* utf8ToBase64(utf8str) => base64
|
||||
* base64ToUtf8(base64) => string
|
||||
|
||||
* bufferToBase64(array) => base64
|
||||
* base64ToBuffer(base64) => array
|
||||
|
||||
|
@ -45,6 +80,13 @@ var uint8Array = Unibabel.base64ToArr(base64)
|
|||
* hexToBuffer(hexstr) => array
|
||||
* bufferToHex(array) => hexstr
|
||||
|
||||
**Base32 APIs**
|
||||
|
||||
`unibabel.base32.js`
|
||||
|
||||
* base32ToBuffer(b32str) => array
|
||||
* bufferToBase32(array) => b32str
|
||||
|
||||
**Helper APIs**
|
||||
|
||||
* utf8ToBinaryString(utf8str) => binstr
|
||||
|
@ -80,14 +122,22 @@ alert(sMyOutput);
|
|||
License
|
||||
=======
|
||||
|
||||
Mozilla has licensed this code in the Public Domain, which means that I am at liberty to re-license my copy
|
||||
under the Apache 2, which is something that, general speaking, your legal department will feel more comfortable with.
|
||||
* `index.js` and `unibabel.hex.js` are dual-licensed as Apache 2.0 and MIT.
|
||||
* `unibabel.base32.js` is a modified version of [thirty-two](https://github.com/chrisumbel/thirty-two) and is therefore licensed MIT.
|
||||
|
||||
Some parts of the code were taken from MDN, which Mozilla has licensed in the Public Domain,
|
||||
which means that I am at liberty to re-license my copy under the Apache 2 and MIT licenses.
|
||||
|
||||
See <https://developer.mozilla.org/en-US/docs/MDN/About#Copyrights_and_licenses>
|
||||
|
||||
ChangeLog
|
||||
====
|
||||
|
||||
v2.1.0
|
||||
------
|
||||
|
||||
Added `unibabel.base32.js`
|
||||
|
||||
v2.0.0
|
||||
------
|
||||
|
||||
|
|
15
bower.json
15
bower.json
|
@ -1,10 +1,9 @@
|
|||
{
|
||||
"name": "unibabel",
|
||||
"main": "index.js",
|
||||
"version": "2.0.1",
|
||||
"homepage": "https://github.com/coolaj86/unibabel-js",
|
||||
"homepage": "https://git.coolaj86.com/coolaj86/unibabel.js",
|
||||
"authors": [
|
||||
"AJ ONeal <awesome@coolaj86.com>"
|
||||
"AJ ONeal <coolaj86@gmail.com>"
|
||||
],
|
||||
"description": "Convert between UTF8, TypedArrays, and Base64",
|
||||
"moduleType": [
|
||||
|
@ -12,15 +11,21 @@
|
|||
"node"
|
||||
],
|
||||
"keywords": [
|
||||
"ascii",
|
||||
"binary",
|
||||
"utf8",
|
||||
"utf-8",
|
||||
"ArrayBuffer",
|
||||
"TypedArrays",
|
||||
"TypedArray",
|
||||
"Uint",
|
||||
"Uint8Array",
|
||||
"Base64",
|
||||
"b64"
|
||||
"b64",
|
||||
"Base32",
|
||||
"b32"
|
||||
],
|
||||
"license": "Apache2",
|
||||
"license": "Apache-2.0",
|
||||
"ignore": [
|
||||
"**/.*",
|
||||
"node_modules",
|
||||
|
|
|
@ -0,0 +1,12 @@
|
|||
<html>
|
||||
<head>
|
||||
<meta charset="UTF-8">
|
||||
</head>
|
||||
<body>
|
||||
This is for testing. Look in the console.
|
||||
<script src="../index.js"></script>
|
||||
<script src="../unibabel.hex.js"></script>
|
||||
<script src="../unibabel.base32.js"></script>
|
||||
<script src="./test.js"></script>
|
||||
</body>
|
||||
</html>
|
|
@ -0,0 +1,8 @@
|
|||
var base32 = require('thirty-two');
|
||||
var str = "I ½ ♥ 𩶘";
|
||||
var buf = new Buffer(str, 'utf8');
|
||||
console.log('charLen', 7);
|
||||
console.log('byteLen', buf.byteLength, JSON.stringify(buf.toString('utf8')));
|
||||
var b32 = base32.encode(buf); // to base32
|
||||
console.log('encoded', b32.toString('utf8'));
|
||||
console.log('decoded', base32.decode(b32).toString('utf8'));
|
|
@ -0,0 +1,95 @@
|
|||
(function () {
|
||||
'use strict';
|
||||
|
||||
var Unibabel = window.Unibabel;
|
||||
|
||||
//UTF-8
|
||||
var pass = true;
|
||||
var references = {
|
||||
string: "I ½ ♥ 𩶘"
|
||||
, array: [ 73, 32, 194, 189, 32, 226, 153, 165, 32, 240, 169, 182, 152 ]
|
||||
, hex: "4920c2bd20e299a520f0a9b698"
|
||||
, base64: "SSDCvSDimaUg8Km2mA=="
|
||||
, base32: 'JEQMFPJA4KM2KIHQVG3JQ==='
|
||||
};
|
||||
references.buffer = new Uint8Array(references.array);
|
||||
var binrefs = {
|
||||
// Note that the binary string "ÿâó<86>Î<93>k" can't be serialized to text
|
||||
array: [ 255, 226, 26, 243, 134, 206, 147, 107 ]
|
||||
, hex: "ffe21af386ce936b"
|
||||
, base64: "/+Ia84bOk2s="
|
||||
};
|
||||
binrefs.buffer = new Uint8Array(binrefs.array);
|
||||
|
||||
var str = references.string;
|
||||
var buf = Unibabel.utf8ToBuffer(references.string);
|
||||
var base64 = Unibabel.bufferToBase64(references.buffer);
|
||||
var hex = Unibabel.bufferToHex(references.buffer);
|
||||
var b32 = Unibabel.bufferToBase32(references.buffer);
|
||||
|
||||
function buffersAreEqual(buf1, buf2) {
|
||||
if (buf1.length !== buf2.length) {
|
||||
return false;
|
||||
}
|
||||
return Array.prototype.every.call(buf1, function (byte, i) {
|
||||
if (byte === buf2[i]) {
|
||||
return true;
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
// TODO compare buffer
|
||||
if (!buffersAreEqual(buf, references.array)) {
|
||||
pass = false;
|
||||
console.warn('[FAIL] utf8 -> buffer', buf);
|
||||
}
|
||||
if (base64 !== references.base64) {
|
||||
pass = false;
|
||||
console.warn('[FAIL] utf8 -> base64', base64);
|
||||
}
|
||||
if (hex !== references.hex) {
|
||||
pass = false;
|
||||
console.warn('[FAIL] utf8 -> hex', hex);
|
||||
}
|
||||
|
||||
|
||||
// binary
|
||||
var bytes = binrefs.array;
|
||||
buf = new Uint8Array(bytes);
|
||||
str = Unibabel.bufferToBinaryString(buf);
|
||||
base64 = Unibabel.bufferToBase64(buf);
|
||||
hex = Unibabel.bufferToHex(buf);
|
||||
|
||||
// This can't be properly tested because binary strings can't be parsed
|
||||
// if (str !== "ÿâóÎk") {
|
||||
// pass = false;
|
||||
// console.log('[FAIL] binary -> str', str);
|
||||
// }
|
||||
if (binrefs.base64 !== base64) {
|
||||
pass = false;
|
||||
console.warn('[FAIL] binary -> base64', base64);
|
||||
}
|
||||
if (binrefs.hex !== hex) {
|
||||
pass = false;
|
||||
console.warn('[FAIL] binary -> hex', hex);
|
||||
}
|
||||
|
||||
//
|
||||
// Base32
|
||||
//
|
||||
b32 = Unibabel.bufferToBase32(references.buffer);
|
||||
if (references.base32 !== b32) {
|
||||
pass = false;
|
||||
console.warn('[FAIL] binary -> base32', references.base32, '!==', b32);
|
||||
}
|
||||
buf = Unibabel.base32ToBuffer(references.base32);
|
||||
if (!buffersAreEqual(buf, references.buffer)) {
|
||||
pass = false;
|
||||
console.warn('[FAIL] base32 -> binary', references.buffer, '!==', buf);
|
||||
}
|
||||
|
||||
if (pass) {
|
||||
console.info('[PASS] :-D');
|
||||
}
|
||||
|
||||
}());
|
|
@ -1,8 +0,0 @@
|
|||
<html>
|
||||
<script src="./index.js"></script>
|
||||
<script src="./unibabel.hex.js"></script>
|
||||
<script src="./test.js"></script>
|
||||
<body>
|
||||
This is for testing. Look in the console.
|
||||
</body>
|
||||
</html>
|
12
index.js
12
index.js
|
@ -1,4 +1,4 @@
|
|||
(function () {
|
||||
(function (exports) {
|
||||
'use strict';
|
||||
|
||||
function utf8ToBinaryString(str) {
|
||||
|
@ -6,7 +6,7 @@ function utf8ToBinaryString(str) {
|
|||
// replaces any uri escape sequence, such as %0A,
|
||||
// with binary escape, such as 0x0A
|
||||
var binstr = escstr.replace(/%([0-9A-F]{2})/g, function(match, p1) {
|
||||
return String.fromCharCode('0x' + p1);
|
||||
return String.fromCharCode(parseInt(p1, 16));
|
||||
});
|
||||
|
||||
return binstr;
|
||||
|
@ -25,7 +25,7 @@ function utf8ToBase64(str) {
|
|||
|
||||
function binaryStringToUtf8(binstr) {
|
||||
var escstr = binstr.replace(/(.)/g, function (m, p) {
|
||||
var code = p.charCodeAt(p).toString(16).toUpperCase();
|
||||
var code = p.charCodeAt(0).toString(16).toUpperCase();
|
||||
if (code.length < 2) {
|
||||
code = '0' + code;
|
||||
}
|
||||
|
@ -63,7 +63,7 @@ function bufferToBase64(arr) {
|
|||
function binaryStringToBuffer(binstr) {
|
||||
var buf;
|
||||
|
||||
if ('undefined' === typeof Uint8Array) {
|
||||
if ('undefined' !== typeof Uint8Array) {
|
||||
buf = new Uint8Array(binstr.length);
|
||||
} else {
|
||||
buf = [];
|
||||
|
@ -82,7 +82,7 @@ function base64ToBuffer(base64) {
|
|||
return buf;
|
||||
}
|
||||
|
||||
window.Unibabel = {
|
||||
exports.Unibabel = {
|
||||
utf8ToBinaryString: utf8ToBinaryString
|
||||
, utf8ToBuffer: utf8ToBuffer
|
||||
, utf8ToBase64: utf8ToBase64
|
||||
|
@ -101,4 +101,4 @@ window.Unibabel = {
|
|||
, base64ToArr: base64ToBuffer
|
||||
};
|
||||
|
||||
}());
|
||||
}('undefined' !== typeof exports && exports || 'undefined' !== typeof window && window || global));
|
||||
|
|
|
@ -0,0 +1,19 @@
|
|||
'use strict';
|
||||
|
||||
console.warn("Please don't use Unibabel in node.js. If you think you really think you have a valid use case please report it at https://git.coolaj86.com/coolaj86/unibabel.js/issues/new");
|
||||
throw new Error("[unibabel] you're doing it wrong");
|
||||
|
||||
/*
|
||||
var data = 'I ½ ♥ 💩';
|
||||
var encoding = 'utf8';
|
||||
var buf = new Buffer(data, encoding);
|
||||
buf.toString('hex');
|
||||
buf.toString('base64');
|
||||
buf.toString('ascii');
|
||||
buf.toString('utf8');
|
||||
buf.toString('binary'); // deprecated, do not use
|
||||
|
||||
var Base32 = require('thirty-two');
|
||||
var b32 = Base32.encode(buf);
|
||||
Base32.decode(buf);
|
||||
*/
|
|
@ -0,0 +1,37 @@
|
|||
{
|
||||
"name": "unibabel",
|
||||
"version": "2.1.8",
|
||||
"description": "Base64, TypedArrays, and UTF-8 / Unicode conversions in Browser (and Node) JavaScript",
|
||||
"main": "node.js",
|
||||
"browser": {
|
||||
"./node.js": "./index.js"
|
||||
},
|
||||
"scripts": {
|
||||
"test": "echo \"Error: no test specified\" && exit 1"
|
||||
},
|
||||
"repository": {
|
||||
"type": "git",
|
||||
"url": "https://git.coolaj86.com/coolaj86/unibabel.js.git"
|
||||
},
|
||||
"keywords": [
|
||||
"ascii",
|
||||
"binary",
|
||||
"utf8",
|
||||
"utf-8",
|
||||
"ArrayBuffer",
|
||||
"TypedArrays",
|
||||
"TypedArray",
|
||||
"Uint",
|
||||
"Uint8Array",
|
||||
"Base64",
|
||||
"b64",
|
||||
"Base32",
|
||||
"b32"
|
||||
],
|
||||
"author": "AJ ONeal <coolaj86@gmail.com> (https://coolaj86.com/)",
|
||||
"license": "(MIT OR Apache-2.0)",
|
||||
"bugs": {
|
||||
"url": "https://git.coolaj86.com/coolaj86/unibabel.js/issues"
|
||||
},
|
||||
"homepage": "https://git.coolaj86.com/coolaj86/unibabel.js#readme"
|
||||
}
|
66
test.js
66
test.js
|
@ -1,66 +0,0 @@
|
|||
(function () {
|
||||
'use strict';
|
||||
|
||||
var Unibabel = window.Unibabel;
|
||||
|
||||
//UTF-8
|
||||
var pass = true;
|
||||
var str = "I ½ ♥ 𩶘";
|
||||
var buf = Unibabel.utf8ToBuffer(str);
|
||||
var base64 = Unibabel.bufferToBase64(buf);
|
||||
var hex = Unibabel.bufferToHex(buf);
|
||||
|
||||
function buffersAreEqual(buf1, buf2) {
|
||||
if (buf1.length !== buf2.length) {
|
||||
return false;
|
||||
}
|
||||
return Array.prototype.every.call(buf1, function (byte, i) {
|
||||
if (byte === buf2[i]) {
|
||||
return true;
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
console.log('buffer', buf);
|
||||
// TODO compare buffer
|
||||
var reference = [ 73, 32, 194, 189, 32, 226, 153, 165, 32, 240, 169, 182, 152 ];
|
||||
if (!buffersAreEqual(buf, reference)) {
|
||||
pass = false;
|
||||
console.log('[FAIL] utf8 -> buffer', buf);
|
||||
}
|
||||
if (base64 !== "SSDCvSDimaUg8Km2mA==") {
|
||||
pass = false;
|
||||
console.log('[FAIL] utf8 -> base64', base64);
|
||||
}
|
||||
if (hex !== "4920c2bd20e299a520f0a9b698") {
|
||||
pass = false;
|
||||
console.log('[FAIL] utf8 -> hex', hex);
|
||||
}
|
||||
|
||||
|
||||
// binary
|
||||
var bytes = [ 255, 226, 26, 243, 134, 206, 147, 107 ];
|
||||
buf = new Uint8Array(bytes);
|
||||
str = Unibabel.bufferToBinaryString(buf);
|
||||
base64 = Unibabel.bufferToBase64(buf);
|
||||
hex = Unibabel.bufferToHex(buf);
|
||||
|
||||
// This can't be properly tested because binary strings can't be parsed
|
||||
// if (str !== "ÿâóÎk") {
|
||||
// pass = false;
|
||||
// console.log('[FAIL] binary -> str', str);
|
||||
// }
|
||||
if ("/+Ia84bOk2s=" !== base64) {
|
||||
pass = false;
|
||||
console.log('[FAIL] binary -> base64', base64);
|
||||
}
|
||||
if (hex !== "ffe21af386ce936b") {
|
||||
pass = false;
|
||||
console.log('[FAIL] binary -> hex', hex);
|
||||
}
|
||||
|
||||
if (pass) {
|
||||
console.log('[PASS] :-D');
|
||||
}
|
||||
|
||||
}());
|
|
@ -1 +0,0 @@
|
|||
index.js
|
|
@ -0,0 +1,142 @@
|
|||
/*
|
||||
Copyright (c) 2011, Chris Umbel
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
*/
|
||||
(function (exports) {
|
||||
'use strict';
|
||||
|
||||
var charTable = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
|
||||
var byteTable = [
|
||||
0xff, 0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
|
||||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||||
0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
|
||||
0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
|
||||
0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
|
||||
0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||||
0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
|
||||
0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
|
||||
0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
|
||||
0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff
|
||||
];
|
||||
|
||||
function quintetCount(buff) {
|
||||
var quintets = Math.floor(buff.length / 5);
|
||||
return buff.length % 5 === 0 ? quintets: quintets + 1;
|
||||
}
|
||||
|
||||
exports.bufferToBase32 = function(plain) {
|
||||
// plain MUST come in either as Array or Uint8Array
|
||||
if('undefined' !== typeof Uint8Array) {
|
||||
if (!(plain instanceof Uint8Array)){
|
||||
plain = new Uint8Array(plain);
|
||||
}
|
||||
}
|
||||
var i = 0;
|
||||
var j = 0;
|
||||
var shiftIndex = 0;
|
||||
var digit = 0;
|
||||
var encoded = new Array(quintetCount(plain) * 8);
|
||||
|
||||
/* byte by byte isn't as pretty as quintet by quintet but tests a bit
|
||||
faster. will have to revisit. */
|
||||
while(i < plain.length) {
|
||||
var current = plain[i];
|
||||
|
||||
if(shiftIndex > 3) {
|
||||
digit = current & (0xff >> shiftIndex);
|
||||
shiftIndex = (shiftIndex + 5) % 8;
|
||||
digit = (digit << shiftIndex) | ((i + 1 < plain.length) ?
|
||||
plain[i + 1] : 0) >> (8 - shiftIndex);
|
||||
i++;
|
||||
} else {
|
||||
digit = (current >> (8 - (shiftIndex + 5))) & 0x1f;
|
||||
shiftIndex = (shiftIndex + 5) % 8;
|
||||
if(shiftIndex === 0) { i++; }
|
||||
}
|
||||
|
||||
encoded[j] = charTable[digit];
|
||||
j++;
|
||||
}
|
||||
|
||||
for(i = j; i < encoded.length; i++) {
|
||||
encoded[i] = '=';
|
||||
}
|
||||
|
||||
return encoded.join('');
|
||||
};
|
||||
|
||||
exports.base32ToBuffer = function(encoded) {
|
||||
var shiftIndex = 0;
|
||||
var plainDigit = 0;
|
||||
var plainChar;
|
||||
var plainPos = 0;
|
||||
var len = Math.ceil(encoded.length * 5 / 8);
|
||||
var decoded;
|
||||
encoded = encoded.split('').map(function (ch) {
|
||||
return ch.charCodeAt(0);
|
||||
});
|
||||
if('undefined' !== typeof Uint8Array) {
|
||||
encoded = new Uint8Array(encoded);
|
||||
decoded = new Uint8Array(len);
|
||||
} else {
|
||||
decoded = new Array(len);
|
||||
}
|
||||
|
||||
/* byte by byte isn't as pretty as octet by octet but tests a bit
|
||||
faster. will have to revisit. */
|
||||
for(var i = 0; i < encoded.length; i++) {
|
||||
if(encoded[i] === 0x3d){ //'='
|
||||
break;
|
||||
}
|
||||
|
||||
var encodedByte = encoded[i] - 0x30;
|
||||
|
||||
if(encodedByte < byteTable.length) {
|
||||
plainDigit = byteTable[encodedByte];
|
||||
|
||||
if(shiftIndex <= 3) {
|
||||
shiftIndex = (shiftIndex + 5) % 8;
|
||||
|
||||
if(shiftIndex === 0) {
|
||||
plainChar |= plainDigit;
|
||||
decoded[plainPos] = plainChar;
|
||||
plainPos++;
|
||||
plainChar = 0;
|
||||
} else {
|
||||
plainChar |= 0xff & (plainDigit << (8 - shiftIndex));
|
||||
}
|
||||
} else {
|
||||
shiftIndex = (shiftIndex + 5) % 8;
|
||||
plainChar |= 0xff & (plainDigit >>> shiftIndex);
|
||||
decoded[plainPos] = plainChar;
|
||||
plainPos++;
|
||||
|
||||
plainChar = 0xff & (plainDigit << (8 - shiftIndex));
|
||||
}
|
||||
} else {
|
||||
throw new Error('Invalid input - it is not base32 encoded string');
|
||||
}
|
||||
}
|
||||
|
||||
if (decoded.slice) { // Array or TypedArray
|
||||
return decoded.slice(0, plainPos);
|
||||
} else { // Mobile Safari TypedArray
|
||||
return new Uint8Array(Array.prototype.slice.call(decoded, 0, plainPos));
|
||||
}
|
||||
};
|
||||
|
||||
}(window.Unibabel || window));
|
Loading…
Reference in New Issue