Class FixedSizeBitVector

java.lang.Object
com.ibm.wala.util.intset.FixedSizeBitVector
All Implemented Interfaces:
Serializable, Cloneable
public final class FixedSizeBitVector extends Object implements Cloneable, Serializable
See Also:

  • Constructor Details

    • FixedSizeBitVector

      public FixedSizeBitVector(int nbits)
      Creates an empty string with the specified size.
      Parameters:
      nbits - the size of the string

    • FixedSizeBitVector

      public FixedSizeBitVector(FixedSizeBitVector s)
      Creates a copy of a Bit String
      Parameters:
      s - the string to copy
      Throws:
      IllegalArgumentException - if s is null

  • Method Details

    • setAll

      public void setAll()
      Sets all bits.

    • set

      public void set(int bit)
      Sets a bit.
      Parameters:
      bit - the bit to be set

    • clearAll

      public void clearAll()
      Clears all bits.

    • clear

      public void clear(int bit)
      Clears a bit.
      Parameters:
      bit - the bit to be cleared

    • get

      public boolean get(int bit)
      Gets a bit.
      Parameters:
      bit - the bit to be gotten

    • not

      public void not()
      Logically NOT this bit string

    • not

      public static FixedSizeBitVector not(FixedSizeBitVector s)
      Return the NOT of a bit string

    • and

      public void and(FixedSizeBitVector set)
      Logically ANDs this bit set with the specified set of bits.
      Parameters:
      set - the bit set to be ANDed with

    • and

      public static FixedSizeBitVector and(FixedSizeBitVector b1, FixedSizeBitVector b2)
      Return a new bit string as the AND of two others.

    • or

      public void or(FixedSizeBitVector set) throws IllegalArgumentException
      Logically ORs this bit set with the specified set of bits.
      Parameters:
      set - the bit set to be ORed with
      Throws:
      IllegalArgumentException - if set == null

    • or

      public static FixedSizeBitVector or(FixedSizeBitVector b1, FixedSizeBitVector b2) throws IllegalArgumentException
      Return a new FixedSizeBitVector as the OR of two others
      Throws:
      IllegalArgumentException - if b2 == null

    • xor

      public void xor(FixedSizeBitVector set)
      Logically XORs this bit set with the specified set of bits.
      Parameters:
      set - the bit set to be XORed with
      Throws:
      IllegalArgumentException - if set is null

    • intersectionEmpty

      public boolean intersectionEmpty(FixedSizeBitVector other)
      Check if the intersection of the two sets is empty
      Parameters:
      other - the set to check intersection with

    • copyBits

      public void copyBits(FixedSizeBitVector set)
      Copies the values of the bits in the specified set into this set.
      Parameters:
      set - the bit set to copy the bits from
      Throws:
      IllegalArgumentException - if set is null

    • hashCode

      public int hashCode()
      Gets the hashcode.
      Overrides:
      hashCode in class Object

    • populationCount

      public int populationCount()
      How many bits are set?

    • length

      public int length()
      Calculates and returns the set's size in bits. The maximum element in the set is the size - 1st element.

    • equals

      public boolean equals(Object obj)
      Compares this object against the specified object.
      Overrides:
      equals in class Object
      Parameters:
      obj - the object to compare with
      Returns:
      true if the objects are the same; false otherwise.

    • isZero

      public boolean isZero()

    • clone

      public Object clone()
      Clones the FixedSizeBitVector.
      Overrides:
      clone in class Object

    • toString

      public String toString()
      Converts the FixedSizeBitVector to a String.
      Overrides:
      toString in class Object