diff options
Diffstat (limited to 'webclients/novnc/include/base64.js')
| -rw-r--r-- | webclients/novnc/include/base64.js | 232 |
1 files changed, 99 insertions, 133 deletions
diff --git a/webclients/novnc/include/base64.js b/webclients/novnc/include/base64.js index e9b3c52..651fbad 100644 --- a/webclients/novnc/include/base64.js +++ b/webclients/novnc/include/base64.js @@ -1,147 +1,113 @@ -/* - * Modified from: - * http://lxr.mozilla.org/mozilla/source/extensions/xml-rpc/src/nsXmlRpcClient.js#956 - */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ -/* ***** BEGIN LICENSE BLOCK ***** - * Version: MPL 1.1/GPL 2.0/LGPL 2.1 - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * http://www.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - * - * The Original Code is Mozilla XML-RPC Client component. - * - * The Initial Developer of the Original Code is - * Digital Creations 2, Inc. - * Portions created by the Initial Developer are Copyright (C) 2000 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): - * Martijn Pieters <mj@digicool.com> (original author) - * Samuel Sieb <samuel@sieb.net> - * - * Alternatively, the contents of this file may be used under the terms of - * either the GNU General Public License Version 2 or later (the "GPL"), or - * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), - * in which case the provisions of the GPL or the LGPL are applicable instead - * of those above. If you wish to allow use of your version of this file only - * under the terms of either the GPL or the LGPL, and not to allow others to - * use your version of this file under the terms of the MPL, indicate your - * decision by deleting the provisions above and replace them with the notice - * and other provisions required by the GPL or the LGPL. If you do not delete - * the provisions above, a recipient may use your version of this file under - * the terms of any one of the MPL, the GPL or the LGPL. - * - * ***** END LICENSE BLOCK ***** */ +// From: http://hg.mozilla.org/mozilla-central/raw-file/ec10630b1a54/js/src/devtools/jint/sunspider/string-base64.js -/*jslint white: false, bitwise: false, plusplus: false */ +/*jslint white: false */ /*global console */ var Base64 = { - -/* Convert data (an array of integers) to a Base64 string. */ -toBase64Table : 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/', -base64Pad : '=', - -encode: function (data) { - "use strict"; - var result = '', - chrTable = Base64.toBase64Table.split(''), - pad = Base64.base64Pad, - length = data.length, - i; - // Convert every three bytes to 4 ascii characters. - for (i = 0; i < (length - 2); i += 3) { - result += chrTable[data[i] >> 2]; - result += chrTable[((data[i] & 0x03) << 4) + (data[i+1] >> 4)]; - result += chrTable[((data[i+1] & 0x0f) << 2) + (data[i+2] >> 6)]; - result += chrTable[data[i+2] & 0x3f]; - } - - // Convert the remaining 1 or 2 bytes, pad out to 4 characters. - if (length%3) { - i = length - (length%3); - result += chrTable[data[i] >> 2]; - if ((length%3) === 2) { - result += chrTable[((data[i] & 0x03) << 4) + (data[i+1] >> 4)]; - result += chrTable[(data[i+1] & 0x0f) << 2]; - result += pad; - } else { - result += chrTable[(data[i] & 0x03) << 4]; - result += pad + pad; + /* Convert data (an array of integers) to a Base64 string. */ + toBase64Table : 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='.split(''), + base64Pad : '=', + + encode: function (data) { + "use strict"; + var result = ''; + var toBase64Table = Base64.toBase64Table; + var length = data.length; + var lengthpad = (length % 3); + // Convert every three bytes to 4 ascii characters. + + for (var i = 0; i < (length - 2); i += 3) { + result += toBase64Table[data[i] >> 2]; + result += toBase64Table[((data[i] & 0x03) << 4) + (data[i + 1] >> 4)]; + result += toBase64Table[((data[i + 1] & 0x0f) << 2) + (data[i + 2] >> 6)]; + result += toBase64Table[data[i + 2] & 0x3f]; } - } - - return result; -}, - -/* Convert Base64 data to a string */ -toBinaryTable : [ - -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, - -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, - -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63, - 52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1, - -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14, - 15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1, - -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40, - 41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1 -], - -decode: function (data, offset) { - "use strict"; - offset = typeof(offset) !== 'undefined' ? offset : 0; - var binTable = Base64.toBinaryTable, - pad = Base64.base64Pad, - result, result_length, idx, i, c, padding, - leftbits = 0, // number of bits decoded, but yet to be appended - leftdata = 0, // bits decoded, but yet to be appended - data_length = data.indexOf('=') - offset; - if (data_length < 0) { data_length = data.length - offset; } - - /* Every four characters is 3 resulting numbers */ - result_length = (data_length >> 2) * 3 + Math.floor((data_length%4)/1.5); - result = new Array(result_length); - - // Convert one by one. - for (idx = 0, i = offset; i < data.length; i++) { - c = binTable[data.charCodeAt(i) & 0x7f]; - padding = (data.charAt(i) === pad); - // Skip illegal characters and whitespace - if (c === -1) { - console.error("Illegal character code " + data.charCodeAt(i) + " at position " + i); - continue; + // Convert the remaining 1 or 2 bytes, pad out to 4 characters. + var j = 0; + if (lengthpad === 2) { + j = length - lengthpad; + result += toBase64Table[data[j] >> 2]; + result += toBase64Table[((data[j] & 0x03) << 4) + (data[j + 1] >> 4)]; + result += toBase64Table[(data[j + 1] & 0x0f) << 2]; + result += toBase64Table[64]; + } else if (lengthpad === 1) { + j = length - lengthpad; + result += toBase64Table[data[j] >> 2]; + result += toBase64Table[(data[j] & 0x03) << 4]; + result += toBase64Table[64]; + result += toBase64Table[64]; } - - // Collect data into leftdata, update bitcount - leftdata = (leftdata << 6) | c; - leftbits += 6; - // If we have 8 or more bits, append 8 bits to the result - if (leftbits >= 8) { - leftbits -= 8; - // Append if not padding. - if (!padding) { - result[idx++] = (leftdata >> leftbits) & 0xff; + return result; + }, + + /* Convert Base64 data to a string */ + /* jshint -W013 */ + toBinaryTable : [ + -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, + -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, + -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63, + 52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1, + -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14, + 15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1, + -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40, + 41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1 + ], + /* jshint +W013 */ + + decode: function (data, offset) { + "use strict"; + offset = typeof(offset) !== 'undefined' ? offset : 0; + var toBinaryTable = Base64.toBinaryTable; + var base64Pad = Base64.base64Pad; + var result, result_length; + var leftbits = 0; // number of bits decoded, but yet to be appended + var leftdata = 0; // bits decoded, but yet to be appended + var data_length = data.indexOf('=') - offset; + + if (data_length < 0) { data_length = data.length - offset; } + + /* Every four characters is 3 resulting numbers */ + result_length = (data_length >> 2) * 3 + Math.floor((data_length % 4) / 1.5); + result = new Array(result_length); + + // Convert one by one. + for (var idx = 0, i = offset; i < data.length; i++) { + var c = toBinaryTable[data.charCodeAt(i) & 0x7f]; + var padding = (data.charAt(i) === base64Pad); + // Skip illegal characters and whitespace + if (c === -1) { + console.error("Illegal character code " + data.charCodeAt(i) + " at position " + i); + continue; + } + + // Collect data into leftdata, update bitcount + leftdata = (leftdata << 6) | c; + leftbits += 6; + + // If we have 8 or more bits, append 8 bits to the result + if (leftbits >= 8) { + leftbits -= 8; + // Append if not padding. + if (!padding) { + result[idx++] = (leftdata >> leftbits) & 0xff; + } + leftdata &= (1 << leftbits) - 1; } - leftdata &= (1 << leftbits) - 1; } - } - // If there are any bits left, the base64 string was corrupted - if (leftbits) { - throw {name: 'Base64-Error', - message: 'Corrupted base64 string'}; - } - - return result; -} + // If there are any bits left, the base64 string was corrupted + if (leftbits) { + err = new Error('Corrupted base64 string'); + err.name = 'Base64-Error'; + throw err; + } + return result; + } }; /* End of Base64 namespace */ |
