Function isBinary

packages/core/src/utils/textUtils.ts:15–35

(
  data: Buffer | null | undefined,
  sampleSize = 512,
)

 * @returns True if a NULL byte is found, false otherwise.
 */
export function isBinary(
  data: Buffer | null | undefined,
  sampleSize = 512,
): boolean {
  if (!data) {
    return false;
  }

  const sample = data.length > sampleSize ? data.subarray(0, sampleSize) : data;

  for (const byte of sample) {
    // The presence of a NULL byte (0x00) is one of the most reliable
    // indicators of a binary file. Text files should not contain them.
    if (byte === 0) {
      return true;
    }
  }

  // If no NULL bytes were found in the sample, we assume it's text.
  return false;
}