val sectionOffset = rangesBuffer.size.toInt() / 4

    // Section prefix.
    sectionIndexBuffer.writeByte(section and 0x1fc000 shr 14)
    sectionIndexBuffer.writeByte((section and 0x3f80) shr 7)

    // Section index.
    sectionIndexBuffer.writeByte((sectionOffset and 0x3f80) shr 7)
    sectionIndexBuffer.writeByte(sectionOffset and 0x7f)

    // Ranges.
    for (range in sectionMappedRanges) {

   * in (by dividing by 4) and out (by multiplying by 4).
   */
  private fun findSectionsIndex(codePoint: Int): Int {
    val target = (codePoint and 0x1fff80) shr 7
    val offset =
      binarySearch(
        position = 0,
        limit = sections.length / 4,
      ) { index ->
        val entryIndex = index * 4
        val b0b1 = sections.read14BitInt(entryIndex)