Function numUtf8BytesToNumCodeUnits

src/utf.ts:40–55

(text: string, numUtf8Bytes?: number)

}

export function numUtf8BytesToNumCodeUnits(text: string, numUtf8Bytes?: number): number {
  if (numUtf8Bytes === 0) {
    return 0;
  }
  let curNumCodeUnits = 0;
  let curNumUtf8Bytes = 0;
  for (const codePoint of text) {
    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
    curNumUtf8Bytes += numUtf8BytesForCodePoint(codePoint.codePointAt(0)!);
    curNumCodeUnits += codePoint.length;
    if (numUtf8Bytes !== undefined && curNumUtf8Bytes >= numUtf8Bytes) {
      break;
    }
  }
  return curNumCodeUnits;
}