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Copy pathutf8.js
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57 lines (51 loc) · 1.55 KB
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/* jshint bitwise: false */
/*
* UTF-8 encoder/decoder
* http://www.webtoolkit.info/
*/
var UTF8 = {
encode: function (s) {
var utftext = '';
for (var n = 0; n < s.length; n++) {
var c = s.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
}
else if((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
}
else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
},
decode: function (utftext) {
var s = '';
var i = 0;
var c = 0, c1 = 0, c2 = 0;
while ( i < utftext.length ) {
c = utftext.charCodeAt(i);
if (c < 128) {
s += String.fromCharCode(c);
i++;
}
else if((c > 191) && (c < 224)) {
c1 = utftext.charCodeAt(i+1);
s += String.fromCharCode(((c & 31) << 6) | (c1 & 63));
i += 2;
}
else {
c1 = utftext.charCodeAt(i+1);
c2 = utftext.charCodeAt(i+2);
s += String.fromCharCode(((c & 15) << 12) | ((c1 & 63) << 6) | (c2 & 63));
i += 3;
}
}
return s;
}
};
export default UTF8;