forked from sheetjs/sheetjs
SheetJS
547fba56a2
- XLSX empty numeric cells stubbed (fixes #891 h/t @mgoku) - XLS sheet type identification - XLS/XLSB/XLSM CodeName exposure (fixes #361 h/t @TennisVisuals) - CFB re-exported
42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
JavaScript
var Base64 = (function make_b64(){
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var map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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return {
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encode: function(input/*:string*/)/*:string*/ {
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var o = "";
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var c1=0, c2=0, c3=0, e1=0, e2=0, e3=0, e4=0;
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for(var i = 0; i < input.length; ) {
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c1 = input.charCodeAt(i++);
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c2 = input.charCodeAt(i++);
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c3 = input.charCodeAt(i++);
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e1 = c1 >> 2;
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e2 = ((c1 & 3) << 4) | (c2 >> 4);
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e3 = ((c2 & 15) << 2) | (c3 >> 6);
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e4 = c3 & 63;
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if (isNaN(c2)) { e3 = e4 = 64; }
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else if (isNaN(c3)) { e4 = 64; }
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o += map.charAt(e1) + map.charAt(e2) + map.charAt(e3) + map.charAt(e4);
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}
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return o;
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},
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decode: function b64_decode(input/*:string*/)/*:string*/ {
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var o = "";
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var c1=0, c2=0, c3=0;
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var e1=0, e2=0, e3=0, e4=0;
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input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
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for(var i = 0; i < input.length;) {
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e1 = map.indexOf(input.charAt(i++));
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e2 = map.indexOf(input.charAt(i++));
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e3 = map.indexOf(input.charAt(i++));
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e4 = map.indexOf(input.charAt(i++));
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c1 = (e1 << 2) | (e2 >> 4);
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c2 = ((e2 & 15) << 4) | (e3 >> 2);
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c3 = ((e3 & 3) << 6) | e4;
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o += String.fromCharCode(c1);
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if (e3 !== 64) { o += String.fromCharCode(c2); }
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if (e4 !== 64) { o += String.fromCharCode(c3); }
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}
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return o;
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}
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};
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})();
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