testing/performance/talos/page_load_test/jss/real-base64-5.html

   1 <html><head>
   2 <!-- MOZ_INSERT_CONTENT_HOOK -->
   3 <script src = runner.js></script>
   4 <script>
   5 var onlyName = 'Convert String to Base 64', onlyNum = 8192;
   6 function thisTest() {
   7
   8 /* ***** BEGIN LICENSE BLOCK *****
   9  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  10  *
  11  * The contents of this file are subject to the Mozilla Public License Version
  12  * 1.1 (the "License"); you may not use this file except in compliance with
  13  * the License. You may obtain a copy of the License at
  14  * http://www.mozilla.org/MPL/
  15  *
  16  * Software distributed under the License is distributed on an "AS IS" basis,
  17  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  18  * for the specific language governing rights and limitations under the
  19  * License.
  20  *
  21  * The Original Code is Mozilla XML-RPC Client component.
  22  *
  23  * The Initial Developer of the Original Code is
  24  * Digital Creations 2, Inc.
  25  * Portions created by the Initial Developer are Copyright (C) 2000
  26  * the Initial Developer. All Rights Reserved.
  27  *
  28  * Contributor(s):
  29  *   Martijn Pieters <mj@digicool.com> (original author)
  30  *   Samuel Sieb <samuel@sieb.net>
  31  *
  32  * Alternatively, the contents of this file may be used under the terms of
  33  * either the GNU General Public License Version 2 or later (the "GPL"), or
  34  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  35  * in which case the provisions of the GPL or the LGPL are applicable instead
  36  * of those above. If you wish to allow use of your version of this file only
  37  * under the terms of either the GPL or the LGPL, and not to allow others to
  38  * use your version of this file under the terms of the MPL, indicate your
  39  * decision by deleting the provisions above and replace them with the notice
  40  * and other provisions required by the GPL or the LGPL. If you do not delete
  41  * the provisions above, a recipient may use your version of this file under
  42  * the terms of any one of the MPL, the GPL or the LGPL.
  43  *
  44  * ***** END LICENSE BLOCK ***** */
  45
  46 // From: http://lxr.mozilla.org/mozilla/source/extensions/xml-rpc/src/nsXmlRpcClient.js#956
  47
  48 /* Convert data (an array of integers) to a Base64 string. */
  49 var toBase64Table = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
  50 var base64Pad = '=';
  51
  52 function toBase64(data) {
  53     var result = '';
  54     var length = data.length;
  55     var i;
  56     // Convert every three bytes to 4 ascii characters.
  57     for (i = 0; i < (length - 2); i += 3) {
  58         result += toBase64Table[data[i] >> 2];
  59         result += toBase64Table[((data[i] & 0x03) << 4) + (data[i+1] >> 4)];
  60         result += toBase64Table[((data[i+1] & 0x0f) << 2) + (data[i+2] >> 6)];
  61         result += toBase64Table[data[i+2] & 0x3f];
  62     }
  63
  64     // Convert the remaining 1 or 2 bytes, pad out to 4 characters.
  65     if (length%3) {
  66         i = length - (length%3);
  67         result += toBase64Table[data[i] >> 2];
  68         if ((length%3) == 2) {
  69             result += toBase64Table[((data[i] & 0x03) << 4) + (data[i+1] >> 4)];
  70             result += toBase64Table[(data[i+1] & 0x0f) << 2];
  71             result += base64Pad;
  72         } else {
  73             result += toBase64Table[(data[i] & 0x03) << 4];
  74             result += base64Pad + base64Pad;
  75         }
  76     }
  77
  78     return result;
  79 }
  80
  81 /* Convert Base64 data to a string */
  82 var toBinaryTable = [
  83     -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
  84     -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
  85     -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
  86     52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1,
  87     -1, 0, 1, 2,  3, 4, 5, 6,  7, 8, 9,10, 11,12,13,14,
  88     15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
  89     -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
  90     41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
  91 ];
  92
  93 function base64ToString(data) {
  94     var result = '';
  95     var leftbits = 0; // number of bits decoded, but yet to be appended
  96     var leftdata = 0; // bits decoded, but yet to be appended
  97
  98     // Convert one by one.
  99     for (var i = 0; i < data.length; i++) {
 100         var c = toBinaryTable[data.charCodeAt(i) & 0x7f];
 101         var padding = (data[i] == base64Pad);
 102         // Skip illegal characters and whitespace
 103         if (c == -1) continue;
 104
 105         // Collect data into leftdata, update bitcount
 106         leftdata = (leftdata << 6) | c;
 107         leftbits += 6;
 108
 109         // If we have 8 or more bits, append 8 bits to the result
 110         if (leftbits >= 8) {
 111             leftbits -= 8;
 112             // Append if not padding.
 113             if (!padding)
 114                 result += String.fromCharCode((leftdata >> leftbits) & 0xff);
 115             leftdata &= (1 << leftbits) - 1;
 116         }
 117     }
 118
 119     // If there are any bits left, the base64 string was corrupted
 120     if (leftbits)
 121         throw Components.Exception('Corrupted base64 string');
 122
 123     return result;
 124 }
 125
 126 startTest("real-base64");
 127
 128 var str = "";
 129
 130 for ( var i = 0; i < 2048; i++ )
 131         str += String.fromCharCode( (25 * Math.random()) + 97 );
 132
 133 for ( var i = 2048; i <= 16384; i *= 2 ) (function(i){
 134
 135         var base64;
 136
 137         test( "Convert String to Base 64", i, function(){
 138                 base64 = toBase64(str);
 139         });
 140
 141         if ( !base64 )
 142                 base64 = toBase64(str);
 143
 144         test( "Convert Base 64 to String", i, function(){
 145                 base64ToString(base64);
 146         });
 147
 148         // Double the string
 149         str += str;
 150 })(i);
 151
 152 endTest();
 153 }
 154 </script>
 155 <body onload="thisTest()"></body></html>