return when {
          b2bit8 && b3bit8 -> 127
          b3bit8 -> 126
          b2bit8 -> 125
          else -> 124
        }
      }

    val b2: Int
      get() = mappedTo[0] and 0x7f

    val b3: Int
      get() = mappedTo[1] and 0x7f
  }

  data class InlineDelta(
    override val rangeStart: Int,
    val codepointDelta: Int,
  ) : MappedRange {
    private val absoluteDelta = abs(codepointDelta)

 * prefix. Entries are sorted by their complete code points.
 *
 * The 4 bytes are named b0, b1, b2 and b3. We also define these supplemental values:
 *
 *  * **b2a**: b2 + 0x80
 *  * **b3a**: b3 + 0x80
 *  * **b2b3**: (b2 << 7) + b3
 *
 * b0
 * --
 *
 * The inclusive start of the range. We get the first 14 bits of this code point from the section

          rangesBuffer.writeByte(range.b1)
          rangesBuffer.writeByte(range.b2)
          rangesBuffer.writeByte(range.b3)
        }
        is MappedRange.InlineDelta -> {
          rangesBuffer.writeByte(range.b1)
          rangesBuffer.writeByte(range.b2)
          rangesBuffer.writeByte(range.b3)
        }
        is MappedRange.External -> {
          // Write the mapping.
          val mappingOffset: Int

    set("b", "b1", "b2")
    val iterator = cache.snapshots()
    iterator.next().use {
      assertThat(it.key()).isEqualTo("a")
    }
    set("b", "b3", "b4")
    iterator.next().use {
      assertThat(it.key()).isEqualTo("b")
      it.assertValue(0, "b3")
      it.assertValue(1, "b4")
    }
  }

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)

    server.enqueue(
      MockResponse.Builder()
        .addHeader("Etag", "a")
        .addHeader("Cache-Control: max-age=0")
        .addHeader("A: a1")
        .addHeader("B: b2")
        .addHeader("B: b3")
        .body("abcd")
        .build(),
    )
    server.enqueue(
      MockResponse.Builder()
        .code(HttpURLConnection.HTTP_NOT_MODIFIED)
        .addHeader("B: b4")