Class HintedBsearchSelect

  • All Implemented Interfaces:
    Select, java.io.Serializable

    public class HintedBsearchSelect
    extends java.lang.Object
    implements Select
    A hinted binary-search select implementation.

    Instances of this class perform selection using a hinted binary search over an underlying Rank9 instance. We use 12.5% additional space for a small inventory.

    See Also:
    Serialized Form
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      it.unimi.dsi.bits.BitVector bitVector()
      Returns the bit vector indexed by this structure.
      long numBits()
      Returns the overall number of bits allocated by this structure.
      long select​(long rank)
      Returns the position of the bit of given rank.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • HintedBsearchSelect

        public HintedBsearchSelect​(Rank9 rank9)
    • Method Detail

      • select

        public long select​(long rank)
        Description copied from interface: Select
        Returns the position of the bit of given rank. Equivalently, returns the greatest position that is preceded by the specified number of ones.
        Specified by:
        select in interface Select
        Parameters:
        rank - a rank.
        Returns:
        the position of the bit of given rank; if no such bit exists, behavior is undefined .
      • numBits

        public long numBits()
        Description copied from interface: Select
        Returns the overall number of bits allocated by this structure.
        Specified by:
        numBits in interface Select
        Returns:
        the overall number of bits allocated by this structure (not including the bits of the indexed vector).
      • bitVector

        public it.unimi.dsi.bits.BitVector bitVector()
        Description copied from interface: Select
        Returns the bit vector indexed by this structure.

        Note that you are not supposed to modify the returned vector.

        Specified by:
        bitVector in interface Select
        Returns:
        the bit vector indexed by this structure.