Function indexOfWithin

src/utils/readEditContext.ts:148–151

buf.indexOf bounded to [0, end) without allocating a view.

(buf: Buffer, needle: Buffer, end: number)

/** buf.indexOf bounded to [0, end) without allocating a view. */
function indexOfWithin(buf: Buffer, needle: Buffer, end: number): number {
  const at = buf.indexOf(needle)
  return at === -1 || at + needle.length > end ? -1 : at
}

function countNewlines(buf: Buffer, start: number, end: number): number {
  let n = 0