Public
Edited
May 19, 2024
2 stars
control = await gunzip(await FileAttachment("unicode-15.1.0-names-control.json.gz").blob()).json()
names = await gunzip(await FileAttachment("unicode-15.1.0-names.json.gz").blob()).json()
function gunzip(data) {
return new Response(new Blob([data]).stream().pipeThrough(new DecompressionStream('gzip')))
}
// modified from https://github.com/node-unicode/unicode-15.1.0/blob/main/decode-property-map.js
function* generateEntries(runs) {
const len = runs.length - 2
for (let cp = 0, i = 0; i < len; /* i++ */) {
cp += runs[i++]
const end = cp + (runs[i++])
const value = runs[i++]
while (cp < end) {
yield [cp++, value]
}
}
}
getNameByCodePoint = {
const map = new Map(
Object.entries(control).map(([k, v]) => [Number(k), v.at(0)])
)
const generator = generateEntries(names)
return function getNameByCodePoint(codePoint) {
while (true) {
const { value } = generator.next()
if (!value) break
const [cp, name] = value
if (!map.has(cp)) {
map.set(cp, name)
}
if (cp >= codePoint) break
}
return map.get(codePoint) ?? null
}
}
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