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| 1 | // https://mathiasbynens.be/notes/javascript-encoding
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| 2 | // https://github.com/bestiejs/punycode.js - punycode.ucs2.decode
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| 3 | export default function ucs2length(str: string): number {
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| 4 | const len = str.length
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| 5 | let length = 0
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| 6 | let pos = 0
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| 7 | let value: number
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| 8 | while (pos < len) {
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| 9 | length++
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| 10 | value = str.charCodeAt(pos++)
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| 11 | if (value >= 0xd800 && value <= 0xdbff && pos < len) {
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| 12 | // high surrogate, and there is a next character
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| 13 | value = str.charCodeAt(pos)
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| 14 | if ((value & 0xfc00) === 0xdc00) pos++ // low surrogate
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| 15 | }
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| 16 | }
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| 17 | return length
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| 18 | }
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| 19 |
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| 20 | ucs2length.code = 'require("ajv/dist/runtime/ucs2length").default'
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