* permissive and permits the `_` character.
 *
 * [mapping table]: https://www.unicode.org/reports/tr46/#IDNA_Mapping_Table
 * [mapping step]: https://www.unicode.org/reports/tr46/#ProcessingStepMap
 */
class SimpleIdnaMappingTable internal constructor(
  internal val mappings: List<Mapping>,
) {
  /**
   * Returns true if the [codePoint] was applied successfully. Returns false if it was disallowed.
   */
  fun map(
    codePoint: Int,

package okhttp3.internal.idn

import kotlin.math.abs
import kotlin.streams.toList
import okio.Buffer

/** Index [table] for compactness as specified by `IdnaMappingTable`. */
fun buildIdnaMappingTableData(table: SimpleIdnaMappingTable): IdnaMappingTableData {
  val simplified = mergeAdjacentRanges(table.mappings)
  val withoutSectionSpans = withoutSectionSpans(simplified)
  val sections = sections(withoutSectionSpans)

  val rangesBuffer = Buffer()

import org.junit.jupiter.api.Test

/** Confirm we get the expected table whether we build it from the .txt file or compact that. */
class IdnaMappingTableTest {
  private lateinit var table: SimpleIdnaMappingTable
  private lateinit var compactTable: IdnaMappingTable

  @BeforeEach
  fun setUp() {
    val path = "/okhttp3/internal/idna/IdnaMappingTable.txt".toPath()
    val plainTable =