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25 lines
663 B
25 lines
663 B
3 years ago
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/**
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* @description: utf16to8
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* @param {String} str
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* @return {String}
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*/
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export default function utf16to8(str) {
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var out, i, len, c;
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out = '';
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len = str.length;
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for (i = 0; i < len; i++) {
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c = str.charCodeAt(i);
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if (c >= 0x0001 && c <= 0x007f) {
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out += str.charAt(i);
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} else if (c > 0x07ff) {
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out += String.fromCharCode(0xe0 | ((c >> 12) & 0x0f));
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out += String.fromCharCode(0x80 | ((c >> 6) & 0x3f));
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out += String.fromCharCode(0x80 | ((c >> 0) & 0x3f));
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} else {
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out += String.fromCharCode(0xc0 | ((c >> 6) & 0x1f));
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out += String.fromCharCode(0x80 | ((c >> 0) & 0x3f));
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}
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}
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return out;
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}
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