root / trunk / web / dojo / dojox / encoding / base64.js
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1 | 9 | andrej.cim | /*
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2 | Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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3 | Available via Academic Free License >= 2.1 OR the modified BSD license.
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4 | see: http://dojotoolkit.org/license for details
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5 | */
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6 | |||
7 | |||
8 | if(!dojo._hasResource["dojox.encoding.base64"]){ |
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9 | dojo._hasResource["dojox.encoding.base64"]=true; |
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10 | dojo.provide("dojox.encoding.base64");
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11 | (function(){
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12 | var p="="; |
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13 | var _1="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
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14 | var _2=dojox.encoding;
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15 | _2.base64.encode=function(ba){ |
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16 | var s=[],l=ba.length;
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17 | var rm=l%3; |
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18 | var x=l-rm;
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19 | for(var i=0;i<x;){ |
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20 | var t=ba[i++]<<16|ba[i++]<<8|ba[i++]; |
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21 | s.push(_1.charAt((t>>>18)&63)); |
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22 | s.push(_1.charAt((t>>>12)&63)); |
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23 | s.push(_1.charAt((t>>>6)&63)); |
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24 | s.push(_1.charAt(t&63));
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25 | } |
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26 | switch(rm){
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27 | case 2: |
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28 | var t=ba[i++]<<16|ba[i++]<<8; |
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29 | s.push(_1.charAt((t>>>18)&63)); |
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30 | s.push(_1.charAt((t>>>12)&63)); |
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31 | s.push(_1.charAt((t>>>6)&63)); |
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32 | s.push(p); |
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33 | break;
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34 | case 1: |
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35 | var t=ba[i++]<<16; |
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36 | s.push(_1.charAt((t>>>18)&63)); |
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37 | s.push(_1.charAt((t>>>12)&63)); |
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38 | s.push(p); |
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39 | s.push(p); |
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40 | break;
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41 | } |
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42 | return s.join(""); |
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43 | }; |
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44 | _2.base64.decode=function(_3){ |
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45 | var s=_3.split(""),_4=[]; |
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46 | var l=s.length;
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47 | while(s[--l]==p){
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48 | } |
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49 | for(var i=0;i<l;){ |
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50 | var t=_1.indexOf(s[i++])<<18; |
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51 | if(i<=l){
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52 | t|=_1.indexOf(s[i++])<<12;
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53 | } |
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54 | if(i<=l){
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55 | t|=_1.indexOf(s[i++])<<6;
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56 | } |
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57 | if(i<=l){
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58 | t|=_1.indexOf(s[i++]); |
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59 | } |
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60 | _4.push((t>>>16)&255); |
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61 | _4.push((t>>>8)&255); |
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62 | _4.push(t&255);
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63 | } |
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64 | while(_4[_4.length-1]==0){ |
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65 | _4.pop(); |
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66 | } |
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67 | return _4;
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68 | }; |
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69 | })(); |
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70 | } |