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- // https://mathiasbynens.be/notes/javascript-encoding
- // https://github.com/bestiejs/punycode.js - punycode.ucs2.decode
- export default function ucs2length(str: string): number {
- const len = str.length
- let length = 0
- let pos = 0
- let value: number
- while (pos < len) {
- length++
- value = str.charCodeAt(pos++)
- if (value >= 0xd800 && value <= 0xdbff && pos < len) {
- // high surrogate, and there is a next character
- value = str.charCodeAt(pos)
- if ((value & 0xfc00) === 0xdc00) pos++ // low surrogate
- }
- }
- return length
- }
- ucs2length.code = 'require("ajv/dist/runtime/ucs2length").default'
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