Base64EncodeDecode

Base64EncodeDecode

var Base64={_keyStr:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",encode:function(r){var e,t,a,o,n,c,d,h="",C=0;for(r=Base64._utf8_encode(r);C<r.length;)o=(e=r.charCodeAt(C++))>>2,n=(3&e)<<4|(t=r.charCodeAt(C++))>>4,c=(15&t)<<2|(a=r.charCodeAt(C++))>>6,d=63&a,isNaN(t)?c=d=64:isNaN(a)&&(d=64),h=h+Base64._keyStr.charAt(o)+Base64._keyStr.charAt(n)+Base64._keyStr.charAt(c)+Base64._keyStr.charAt(d);return h},decode:function(r){var e,t,a,o,n,c,d="",h=0;for(r=r.replace(/[^A-Za-z0-9\+\/\=]/g,"");h<r.length;)e=Base64._keyStr.indexOf(r.charAt(h++))<<2|(o=Base64._keyStr.indexOf(r.charAt(h++)))>>4,t=(15&o)<<4|(n=Base64._keyStr.indexOf(r.charAt(h++)))>>2,a=(3&n)<<6|(c=Base64._keyStr.indexOf(r.charAt(h++))),d+=String.fromCharCode(e),64!=n&&(d+=String.fromCharCode(t)),64!=c&&(d+=String.fromCharCode(a));return d=Base64._utf8_decode(d)},_utf8_encode:function(r){r=r.replace(/\r\n/g,"\n");for(var e="",t=0;t<r.length;t++){var a=r.charCodeAt(t);a<128?e+=String.fromCharCode(a):a>127&&a<2048?(e+=String.fromCharCode(a>>6|192),e+=String.fromCharCode(63&a|128)):(e+=String.fromCharCode(a>>12|224),e+=String.fromCharCode(a>>6&63|128),e+=String.fromCharCode(63&a|128))}return e},_utf8_decode:function(r){for(var e="",t=0,a=c1=c2=0;t<r.length;)(a=r.charCodeAt(t))<128?(e+=String.fromCharCode(a),t++):a>191&&a<224?(c2=r.charCodeAt(t+1),e+=String.fromCharCode((31&a)<<6|63&c2),t+=2):(c2=r.charCodeAt(t+1),c3=r.charCodeAt(t+2),e+=String.fromCharCode((15&a)<<12|(63&c2)<<6|63&c3),t+=3);return e}};