Function decodeUtf16LeIgnore

packages/kaos/src/internal.ts:84–121

(data: Buffer)

}

function decodeUtf16LeIgnore(data: Buffer): string {
  let output = '';
  let i = 0;

  while (i + 1 < data.length) {
    const first = data[i];
    const second = data[i + 1];
    if (first === undefined || second === undefined) break;

    const codeUnit = first | (second << 8);

    if (codeUnit >= 0xd800 && codeUnit <= 0xdbff) {
      const lowFirst = data[i + 2];
      const lowSecond = data[i + 3];
      if (lowFirst !== undefined && lowSecond !== undefined) {
        const low = lowFirst | (lowSecond << 8);
        if (low >= 0xdc00 && low <= 0xdfff) {
          const codePoint = 0x10000 + ((codeUnit - 0xd800) << 10) + (low - 0xdc00);
          output += String.fromCodePoint(codePoint);
          i += 4;
          continue;
        }
      }
      i += 2;
      continue;
    }

    if (codeUnit >= 0xdc00 && codeUnit <= 0xdfff) {
      i += 2;
      continue;
    }

    output += String.fromCodePoint(codeUnit);
    i += 2;
  }

  return output;
}

/**
 * Decode a Buffer into a string with Python-compatible `errors` handling.