6 lines
1.5 KiB
JavaScript
6 lines
1.5 KiB
JavaScript
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/**
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*
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* Base64 encode / decode
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* http://www.webtoolkit.info/
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*
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**/var Base64={_keyStr:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",encode:function(e){var t="",n,r,i,s,o,u,a,f=0;e=Base64._utf8_encode(e);while(f<e.length)n=e.charCodeAt(f++),r=e.charCodeAt(f++),i=e.charCodeAt(f++),s=n>>2,o=(n&3)<<4|r>>4,u=(r&15)<<2|i>>6,a=i&63,isNaN(r)?u=a=64:isNaN(i)&&(a=64),t=t+this._keyStr.charAt(s)+this._keyStr.charAt(o)+this._keyStr.charAt(u)+this._keyStr.charAt(a);return t},decode:function(e){var t="",n,r,i,s,o,u,a,f=0;e=e.replace(/[^A-Za-z0-9\+\/\=]/g,"");while(f<e.length)s=this._keyStr.indexOf(e.charAt(f++)),o=this._keyStr.indexOf(e.charAt(f++)),u=this._keyStr.indexOf(e.charAt(f++)),a=this._keyStr.indexOf(e.charAt(f++)),n=s<<2|o>>4,r=(o&15)<<4|u>>2,i=(u&3)<<6|a,t+=String.fromCharCode(n),u!=64&&(t+=String.fromCharCode(r)),a!=64&&(t+=String.fromCharCode(i));return t=Base64._utf8_decode(t),t},_utf8_encode:function(e){e=e.replace(/\r\n/g,"\n");var t="";for(var n=0;n<e.length;n++){var r=e.charCodeAt(n);r<128?t+=String.fromCharCode(r):r>127&&r<2048?(t+=String.fromCharCode(r>>6|192),t+=String.fromCharCode(r&63|128)):(t+=String.fromCharCode(r>>12|224),t+=String.fromCharCode(r>>6&63|128),t+=String.fromCharCode(r&63|128))}return t},_utf8_decode:function(e){var t="",n=0,r=c1=c2=0;while(n<e.length)r=e.charCodeAt(n),r<128?(t+=String.fromCharCode(r),n++):r>191&&r<224?(c2=e.charCodeAt(n+1),t+=String.fromCharCode((r&31)<<6|c2&63),n+=2):(c2=e.charCodeAt(n+1),c3=e.charCodeAt(n+2),t+=String.fromCharCode((r&15)<<12|(c2&63)<<6|c3&63),n+=3);return t}};
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