Class Rank12

All Implemented Interfaces:
Rank, Serializable

public class Rank12 extends AbstractRank implements Rank
A rank12 implementation.

rank12 is a ranking structure using 3.125% additional space and providing fast ranking. It is the natural loosening of Rank11 in which the words for superblock are doubled.

See Also:
  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected long[]
     
    protected final it.unimi.dsi.bits.BitVector
     
    protected final long[]
     
    protected final long
     
    protected final long
     
    protected final int
     
  • Constructor Summary

    Constructors
    Constructor
    Description
    Rank12(long[] bits, long length)
     
    Rank12(it.unimi.dsi.bits.BitVector bitVector)
     
  • Method Summary

    Modifier and Type
    Method
    Description
    it.unimi.dsi.bits.BitVector
    Returns the bit vector indexed by this structure.
    long
    Returns the number of ones in the bit vector indexed by this class.
    long
     
    long
    Returns the overall number of bits allocated by this structure.
    long
    rank(long pos)
    Returns the number of ones preceding the specified position.
    long
    rank(long from, long to)
    Returns the number of ones in the specified interval.

    Methods inherited from class it.unimi.dsi.sux4j.bits.AbstractRank

    rankZero, rankZero

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    Methods inherited from interface it.unimi.dsi.sux4j.bits.Rank

    rankZero, rankZero
  • Field Details

    • bits

      protected transient long[] bits
    • bitVector

      protected final it.unimi.dsi.bits.BitVector bitVector
    • count

      protected final long[] count
    • numWords

      protected final int numWords
    • numOnes

      protected final long numOnes
    • lastOne

      protected final long lastOne
  • Constructor Details

    • Rank12

      public Rank12(long[] bits, long length)
    • Rank12

      public Rank12(it.unimi.dsi.bits.BitVector bitVector)
  • Method Details

    • rank

      public long rank(long pos)
      Description copied from interface: Rank
      Returns the number of ones preceding the specified position.
      Specified by:
      rank in interface Rank
      Parameters:
      pos - a position in the bit vector between 0 (inclusive) and the length of the bit vector (inclusive).
      Returns:
      the number of ones preceding position pos; if pos is out of bounds, behavior is undefined.
    • numBits

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

      public long count()
      Description copied from interface: Rank
      Returns the number of ones in the bit vector indexed by this class.
      Specified by:
      count in interface Rank
      Overrides:
      count in class AbstractRank
      Returns:
      number of ones in the bit vector indexed by this class.
    • rank

      public long rank(long from, long to)
      Description copied from interface: Rank
      Returns the number of ones in the specified interval.
      Specified by:
      rank in interface Rank
      Overrides:
      rank in class AbstractRank
      Parameters:
      from - a position in the bit vector between 0 (inclusive) and the length of the bit vector (inclusive).
      to - a position in the bit vector between 0 (inclusive) and the length of the bit vector (inclusive); must be greater than or equal to from.
      Returns:
      the number of ones between from (inclusive) and to (exclusive); if the parameters are out of bounds, behavior is undefined.
    • lastOne

      public long lastOne()
    • bitVector

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

      Note that you must not modify the returned vector.

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