Function computeTopLevelEntries

src/native-ts/file-index/index.ts:336–367

* Extract unique top-level path segments, sorted by (length asc, then alpha asc). * Handles both Unix (/) and Windows (\) path separators. * Mirrors FileIndex::compute_top_level_entries in lib.rs.

(
  paths: string[],
  limit: number,
)

 * Mirrors FileIndex::compute_top_level_entries in lib.rs.
 */
function computeTopLevelEntries(
  paths: string[],
  limit: number,
): SearchResult[] {
  const topLevel = new Set<string>()

  for (const p of paths) {
    // Split on first / or \ separator
    let end = p.length
    for (let i = 0; i < p.length; i++) {
      const c = p.charCodeAt(i)
      if (c === 47 || c === 92) {
        end = i
        break
      }
    }
    const segment = p.slice(0, end)
    if (segment.length > 0) {
      topLevel.add(segment)
      if (topLevel.size >= limit) break
    }
  }

  const sorted = Array.from(topLevel)
  sorted.sort((a, b) => {
    const lenDiff = a.length - b.length
    if (lenDiff !== 0) return lenDiff
    return a < b ? -1 : a > b ? 1 : 0
  })

  return sorted.slice(0, limit).map(path => ({ path, score: 0.0 }))
}

export default FileIndex
export type { FileIndex as FileIndexType }