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'use strict';
module.exports = function utf8_encode(argString) {
// eslint-disable-line camelcase
// discuss at: http://locutus.io/php/utf8_encode/
// original by: Webtoolkit.info (http://www.webtoolkit.info/)
// improved by: Kevin van Zonneveld (http://kvz.io)
// improved by: sowberry
// improved by: Jack
// improved by: Yves Sucaet
// improved by: kirilloid
// bugfixed by: Onno Marsman (https://twitter.com/onnomarsman)
// bugfixed by: Onno Marsman (https://twitter.com/onnomarsman)
// bugfixed by: Ulrich
// bugfixed by: Rafał Kukawski (http://blog.kukawski.pl)
// bugfixed by: kirilloid
// example 1: utf8_encode('Kevin van Zonneveld')
// returns 1: 'Kevin van Zonneveld'
if (argString === null || typeof argString === 'undefined') {
return '';
}
// .replace(/\r\n/g, "\n").replace(/\r/g, "\n");
var string = argString + '';
var utftext = '';
var start;
var end;
var stringl = 0;
start = end = 0;
stringl = string.length;
for (var n = 0; n < stringl; n++) {
var c1 = string.charCodeAt(n);
var enc = null;
if (c1 < 128) {
end++;
} else if (c1 > 127 && c1 < 2048) {
enc = String.fromCharCode(c1 >> 6 | 192, c1 & 63 | 128);
} else if ((c1 & 0xF800) !== 0xD800) {
enc = String.fromCharCode(c1 >> 12 | 224, c1 >> 6 & 63 | 128, c1 & 63 | 128);
} else {
// surrogate pairs
if ((c1 & 0xFC00) !== 0xD800) {
throw new RangeError('Unmatched trail surrogate at ' + n);
}
var c2 = string.charCodeAt(++n);
if ((c2 & 0xFC00) !== 0xDC00) {
throw new RangeError('Unmatched lead surrogate at ' + (n - 1));
}
c1 = ((c1 & 0x3FF) << 10) + (c2 & 0x3FF) + 0x10000;
enc = String.fromCharCode(c1 >> 18 | 240, c1 >> 12 & 63 | 128, c1 >> 6 & 63 | 128, c1 & 63 | 128);
}
if (enc !== null) {
if (end > start) {
utftext += string.slice(start, end);
}
utftext += enc;
start = end = n + 1;
}
}
if (end > start) {
utftext += string.slice(start, stringl);
}
return utftext;
};
//# sourceMappingURL=utf8_encode.js.map
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