base64.js downgraded from 2.6 to 1.7
because otherwise it would have broken compatibility with data files. (cherry picked from commit 75a27b6243b8cffa69f59c068dac61263574dc5b)pull/17/head
Sebastien SAUVAGE
El RIDO
parent
8435b9ab3a
commit
1b95d6fff7
336
js/base64.js
336
js/base64.js
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@ -1,5 +1,5 @@
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/*
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* $Id: base64.js,v 2.6 2012/08/24 05:23:18 dankogai Exp dankogai $
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* $Id: base64.js,v 1.7 2012/08/23 10:30:18 dankogai Exp dankogai $
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*
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* Licensed under the MIT license.
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* http://www.opensource.org/licenses/mit-license.php
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@ -8,132 +8,230 @@
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* http://en.wikipedia.org/wiki/Base64
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*/
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(function(global) {
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'use strict';
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// if node.js, we use Buffer
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var buffer;
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if (typeof module !== 'undefined' && module.exports) {
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buffer = require('buffer').Buffer;
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}
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// constants
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(function(global){
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var b64chars
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= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
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var b64tab = function(bin) {
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var b64charcodes = function(){
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var a = [];
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var codeA = 'A'.charCodeAt(0);
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var codea = 'a'.charCodeAt(0);
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var code0 = '0'.charCodeAt(0);
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for (var i = 0; i < 26; i ++) a.push(codeA + i);
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for (var i = 0; i < 26; i ++) a.push(codea + i);
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for (var i = 0; i < 10; i ++) a.push(code0 + i);
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a.push('+'.charCodeAt(0));
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a.push('/'.charCodeAt(0));
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return a;
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}();
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var b64tab = function(bin){
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var t = {};
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for (var i = 0, l = bin.length; i < l; i++) t[bin.charAt(i)] = i;
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return t;
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}(b64chars);
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var fromCharCode = String.fromCharCode;
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// encoder stuff
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var cb_utob = function(c) {
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var cc = c.charCodeAt(0);
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return cc < 0x80 ? c
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: cc < 0x800 ? fromCharCode(0xc0 | (cc >>> 6))
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+ fromCharCode(0x80 | (cc & 0x3f))
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: fromCharCode(0xe0 | ((cc >>> 12) & 0x0f))
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+ fromCharCode(0x80 | ((cc >>> 6) & 0x3f))
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+ fromCharCode(0x80 | ( cc & 0x3f));
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var stringToArray = function(s){
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var a = [];
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for (var i = 0, l = s.length; i < l; i ++) a[i] = s.charCodeAt(i);
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return a;
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};
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var utob = function(u) {
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return u.replace(/[^\x00-\x7F]/g, cb_utob);
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};
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var cb_encode = function(ccc) {
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var padlen = [0, 2, 1][ccc.length % 3],
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ord = ccc.charCodeAt(0) << 16
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| ((ccc.length > 1 ? ccc.charCodeAt(1) : 0) << 8)
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| ((ccc.length > 2 ? ccc.charCodeAt(2) : 0)),
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chars = [
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b64chars.charAt( ord >>> 18),
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b64chars.charAt((ord >>> 12) & 63),
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padlen >= 2 ? '=' : b64chars.charAt((ord >>> 6) & 63),
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padlen >= 1 ? '=' : b64chars.charAt(ord & 63)
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];
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return chars.join('');
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};
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var btoa = global.btoa || function(b) {
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return b.replace(/[\s\S]{1,3}/g, cb_encode);
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};
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var _encode = buffer
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? function (u) { return (new buffer(u)).toString('base64') }
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: function (u) { return btoa(utob(u)) }
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;
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var encode = function(u, urisafe) {
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return !urisafe
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? _encode(u)
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: _encode(u).replace(/[+\/]/g, function(m0) {
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return m0 == '+' ? '-' : '_';
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});
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};
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var encodeURI = function(u) { return encode(u, true) };
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// decoder stuff
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var re_btou = /[\xC0-\xDF][\x80-\xBF]|[\xE0-\xEF][\x80-\xBF]{2}/g;
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var cb_btou = function(ccc) {
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return fromCharCode(
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ccc.length < 3 ? ((0x1f & ccc.charCodeAt(0)) << 6)
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| (0x3f & ccc.charCodeAt(1))
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: ((0x0f & ccc.charCodeAt(0)) << 12)
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| ((0x3f & ccc.charCodeAt(1)) << 6)
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| (0x3f & ccc.charCodeAt(2))
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);
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};
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var btou = function(b) {
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return b.replace(re_btou, cb_btou);
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};
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var cb_decode = function(cccc) {
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var len = cccc.length,
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padlen = len % 4,
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n = (len > 0 ? b64tab[cccc.charAt(0)] << 18 : 0)
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| (len > 1 ? b64tab[cccc.charAt(1)] << 12 : 0)
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| (len > 2 ? b64tab[cccc.charAt(2)] << 6 : 0)
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| (len > 3 ? b64tab[cccc.charAt(3)] : 0),
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chars = [
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fromCharCode( n >>> 16),
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fromCharCode((n >>> 8) & 0xff),
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fromCharCode( n & 0xff)
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];
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chars.length -= [0, 0, 2, 1][padlen];
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return chars.join('');
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};
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var atob = global.atob || function(a){
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return a.replace(/[\s\S]{1,4}/g, cb_decode);
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};
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var _decode = buffer
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? function(a) { return (new buffer(a, 'base64')).toString() }
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: function(a) { return btou(atob(a)) }
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;
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var decode = function(a){
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return _decode(
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a.replace(/[-_]/g, function(m0) { return m0 == '-' ? '+' : '/' })
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.replace(/[^A-Za-z0-9\+\/]/g, '')
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);
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};
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// export Base64
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global.Base64 = {
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atob: atob,
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btoa: btoa,
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fromBase64: decode,
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toBase64: encode,
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utob: utob,
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encode: encode,
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encodeURI: encodeURI,
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btou: btou,
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decode: decode
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};
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// if ES5 is available, make Base64.extendString() available
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if (typeof Object.defineProperty === 'function') {
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var noEnum = function(v){
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return {value:v,enumerable:false,writable:true,configurable:true};
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var convertUTF8ArrayToBase64 = function(bin){
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var padlen = 0;
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while (bin.length % 3){
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bin.push(0);
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padlen++;
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};
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global.Base64.extendString = function () {
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Object.defineProperty(
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String.prototype, 'fromBase64', noEnum(function () {
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return decode(this)
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}));
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Object.defineProperty(
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String.prototype, 'toBase64', noEnum(function (urisafe) {
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return encode(this, urisafe)
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}));
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var b64 = [];
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for (var i = 0, l = bin.length; i < l; i += 3){
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var c0 = bin[i], c1 = bin[i+1], c2 = bin[i+2];
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if (c0 >= 256 || c1 >= 256 || c2 >= 256)
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throw 'unsupported character found';
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var n = (c0 << 16) | (c1 << 8) | c2;
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b64.push(
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b64charcodes[ n >>> 18],
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b64charcodes[(n >>> 12) & 63],
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b64charcodes[(n >>> 6) & 63],
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b64charcodes[ n & 63]
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);
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}
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while (padlen--) b64[b64.length - padlen - 1] = '='.charCodeAt(0);
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return chunkStringFromCharCodeApply(b64);
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};
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var convertBase64ToUTF8Array = function(b64){
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b64 = b64.replace(/[^A-Za-z0-9+\/]+/g, '');
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var bin = [];
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var padlen = b64.length % 4;
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for (var i = 0, l = b64.length; i < l; i += 4){
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var n = ((b64tab[b64.charAt(i )] || 0) << 18)
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| ((b64tab[b64.charAt(i+1)] || 0) << 12)
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| ((b64tab[b64.charAt(i+2)] || 0) << 6)
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| ((b64tab[b64.charAt(i+3)] || 0));
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bin.push(
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( n >> 16 ),
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( (n >> 8) & 0xff ),
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( n & 0xff )
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);
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}
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bin.length -= [0,0,2,1][padlen];
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return bin;
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};
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var convertUTF16ArrayToUTF8Array = function(uni){
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var bin = [];
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for (var i = 0, l = uni.length; i < l; i++){
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var n = uni[i];
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if (n < 0x80)
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bin.push(n);
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else if (n < 0x800)
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bin.push(
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0xc0 | (n >>> 6),
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0x80 | (n & 0x3f));
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else
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bin.push(
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0xe0 | ((n >>> 12) & 0x0f),
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0x80 | ((n >>> 6) & 0x3f),
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0x80 | (n & 0x3f));
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}
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return bin;
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};
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var convertUTF8ArrayToUTF16Array = function(bin){
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var uni = [];
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for (var i = 0, l = bin.length; i < l; i++){
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var c0 = bin[i];
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if (c0 < 0x80){
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uni.push(c0);
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}else{
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var c1 = bin[++i];
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if (c0 < 0xe0){
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uni.push(((c0 & 0x1f) << 6) | (c1 & 0x3f));
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}else{
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var c2 = bin[++i];
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uni.push(
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((c0 & 0x0f) << 12) | ((c1 & 0x3f) << 6) | (c2 & 0x3f)
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);
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}
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}
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}
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return uni;
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};
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var convertUTF8StringToBase64 = function(bin){
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return convertUTF8ArrayToBase64(stringToArray(bin));
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};
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var convertBase64ToUTF8String = function(b64){
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return chunkStringFromCharCodeApply(convertBase64ToUTF8Array(b64));
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};
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var convertUTF8StringToUTF16Array = function(bin){
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return convertUTF8ArrayToUTF16Array(stringToArray(bin));
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};
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var convertUTF8ArrayToUTF16String = function(bin){
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return chunkStringFromCharCodeApply(convertUTF8ArrayToUTF16Array(bin));
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};
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var convertUTF8StringToUTF16String = function(bin){
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return chunkStringFromCharCodeApply(
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convertUTF8ArrayToUTF16Array(stringToArray(bin))
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);
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};
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var convertUTF16StringToUTF8Array = function(uni){
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return convertUTF16ArrayToUTF8Array(stringToArray(uni));
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};
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var convertUTF16ArrayToUTF8String = function(uni){
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return chunkStringFromCharCodeApply(convertUTF16ArrayToUTF8Array(uni));
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};
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var convertUTF16StringToUTF8String = function(uni){
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return chunkStringFromCharCodeApply(
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convertUTF16ArrayToUTF8Array(stringToArray(uni))
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);
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};
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/*
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* String.fromCharCode.apply will only handle arrays as big as 65536,
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* after that it'll return a truncated string with no warning.
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*/
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var chunkStringFromCharCodeApply = function(arr){
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var strs = [], i;
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for (i = 0; i < arr.length; i += 65536){
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strs.push(String.fromCharCode.apply(String, arr.slice(i, i+65536)));
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}
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return strs.join('');
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};
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if (global.btoa){
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var btoa = global.btoa;
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var convertUTF16StringToBase64 = function (uni){
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return btoa(convertUTF16StringToUTF8String(uni));
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};
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}
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// that's it!
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else {
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var btoa = convertUTF8StringToBase64;
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var convertUTF16StringToBase64 = function (uni){
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return convertUTF8ArrayToBase64(convertUTF16StringToUTF8Array(uni));
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};
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}
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if (global.atob){
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var atob = global.atob;
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var convertBase64ToUTF16String = function (b64){
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return convertUTF8StringToUTF16String(atob(b64));
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};
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}
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else {
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var atob = convertBase64ToUTF8String;
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var convertBase64ToUTF16String = function (b64){
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return convertUTF8ArrayToUTF16String(convertBase64ToUTF8Array(b64));
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};
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}
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global.Base64 = {
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convertUTF8ArrayToBase64:convertUTF8ArrayToBase64,
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convertByteArrayToBase64:convertUTF8ArrayToBase64,
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convertBase64ToUTF8Array:convertBase64ToUTF8Array,
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convertBase64ToByteArray:convertBase64ToUTF8Array,
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convertUTF16ArrayToUTF8Array:convertUTF16ArrayToUTF8Array,
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convertUTF16ArrayToByteArray:convertUTF16ArrayToUTF8Array,
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convertUTF8ArrayToUTF16Array:convertUTF8ArrayToUTF16Array,
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convertByteArrayToUTF16Array:convertUTF8ArrayToUTF16Array,
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convertUTF8StringToBase64:convertUTF8StringToBase64,
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convertBase64ToUTF8String:convertBase64ToUTF8String,
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convertUTF8StringToUTF16Array:convertUTF8StringToUTF16Array,
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convertUTF8ArrayToUTF16String:convertUTF8ArrayToUTF16String,
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convertByteArrayToUTF16String:convertUTF8ArrayToUTF16String,
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convertUTF8StringToUTF16String:convertUTF8StringToUTF16String,
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convertUTF16StringToUTF8Array:convertUTF16StringToUTF8Array,
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convertUTF16StringToByteArray:convertUTF16StringToUTF8Array,
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convertUTF16ArrayToUTF8String:convertUTF16ArrayToUTF8String,
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convertUTF16StringToUTF8String:convertUTF16StringToUTF8String,
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convertUTF16StringToBase64:convertUTF16StringToBase64,
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convertBase64ToUTF16String:convertBase64ToUTF16String,
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fromBase64:convertBase64ToUTF8String,
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toBase64:convertUTF8StringToBase64,
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atob:atob,
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btoa:btoa,
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utob:convertUTF16StringToUTF8String,
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btou:convertUTF8StringToUTF16String,
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encode:convertUTF16StringToBase64,
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encodeURI:function(u){
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return convertUTF16StringToBase64(u).replace(/[+\/]/g, function(m0){
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return m0 == '+' ? '-' : '_';
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}).replace(/=+$/, '');
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},
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decode:function(a){
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return convertBase64ToUTF16String(a.replace(/[-_]/g, function(m0){
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return m0 == '-' ? '+' : '/';
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}));
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}
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};
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})(this);
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