it.unimi.dsi.bits
Class LongArrayBitVector

java.lang.Object
  java.util.AbstractCollection<Boolean>
      it.unimi.dsi.fastutil.booleans.AbstractBooleanCollection
          it.unimi.dsi.fastutil.booleans.AbstractBooleanBigList
              it.unimi.dsi.bits.AbstractBitVector
                  it.unimi.dsi.bits.LongArrayBitVector

All Implemented Interfaces:

BitVector, BigList<Boolean>, BooleanBigList, BooleanCollection, BooleanIterable, BooleanStack, Size64, Stack<Boolean>, Serializable, Cloneable, Comparable<BigList<? extends Boolean>>, Iterable<Boolean>, Collection<Boolean>, RandomAccess

public class LongArrayBitVector
extends AbstractBitVector
implements Cloneable, Serializable

A bit vector implementation based on arrays of longs.

The main goal of this class is to be fast and flexible. It implements a lightweight, fast, open, optimized, reuse-oriented version of bit vectors. Instances of this class represent a bit vector an array of longs that is enlarged as needed when new entries are created (by dividing the current length by the golden ratio), but is never made smaller (even on a clear()). Use trim() for that purpose.

Besides usual methods for setting and getting bits, this class provides views that make it possible to access comfortably the bit vector in different ways: for instance, asLongBigList(int) provide access as a list of longs, whereas AbstractBitVector.asLongSet() provides access in setwise form.

When enlarging the underlying array (e.g., for append(long, int) operations or add operations on the big list view), or when invoking ensureCapacity(long), this class calls LongArrays.grow(long[], int, int), which could enlarge the array more than expected. On the contrary, length(long) (and the corresponding method in the big list view) sizes the underlying array in an exact manner.

Bit numbering follows the right-to-left convention: bit k (counted from the right) of word w is bit 64w + k of the overall bit vector.

If CHECKS is true at compile time, boundary checks for all bit operations will be compiled in. For maximum speed, you may want to recompile this class with CHECKS set to false. CHECKS is public, so you can check from your code whether you're being provided a version with checks or not.

Warning: A few optional methods have still to be implemented (e.g., adding an element at an arbitrary position using the list view).

Warning: In some cases, you might want to cache locally the result of bits() to speed up computations on immutable bit vectors (this is what happens, for instance, in static ranking structures). This class, however, does its own serialisation of the bit vector: as a result, all cached references to the result of bits() must be marked as transient and rebuilt at deserialisation time, or you will end up saving the bits twice.

See Also:

Serialized Form

Nested Class Summary

protected static class

LongArrayBitVector.LongBigListView A list-of-integers view of a bit vector.

Nested classes/interfaces inherited from class it.unimi.dsi.bits.AbstractBitVector

AbstractBitVector.LongSetView, AbstractBitVector.SubBitVector

Nested classes/interfaces inherited from class it.unimi.dsi.fastutil.booleans.AbstractBooleanBigList

AbstractBooleanBigList.BooleanSubList

Field Summary

static long	ALL_ONES
protected long[]	bits The backing array of this vector.
static int	BITS_PER_WORD
static boolean	CHECKS Whether this class has been compiled with index checks or not.
static int	LAST_BIT
static long	LAST_BIT_MASK
protected long	length The number of bits in this vector.
static int	LOG2_BITS_PER_WORD
static int	WORD_MASK

Constructor Summary

protected

LongArrayBitVector(long capacity)

Method Summary

void	add(long index, boolean value) Adds a bit with specified value at the specified index (optional operation).
BitVector	and(BitVector v) Performs a logical and between this bit vector and another one, leaving the result in this vector.
LongArrayBitVector	append(long value, int width) Appends the less significant bits of a long integer to this bit vector.
LongBigList	asLongBigList(int width) Returns a view of this bit vector as a list of nonnegative integers of specified width.
protected static int	bit(long index) Returns the inside-word index of the bit that would hold the bit of specified index.
long[]	bits() Returns the bits in this bit vector as an array of longs, not to be modified.
void	clear() Sets the size of this bit vector to 0.
void	clear(long index) Clears a bit in this bit vector (optional operation).
LongArrayBitVector	clone() Returns a cloned copy of this bit vector.
LongArrayBitVector	copy() Returns a copy of this bit vector.
static LongArrayBitVector	copy(BitVector bv) Returns a copy of the given bit vector.
LongArrayBitVector	copy(long from, long to) Returns a copy of a part of this bit vector.
long	count() Counts the number of bits set to true in this bit vector.
LongArrayBitVector	ensureCapacity(long numBits) Ensures that this bit vector can hold the specified number of bits.
boolean	equals(LongArrayBitVector v)
boolean	equals(LongArrayBitVector v, long start, long end)
boolean	equals(Object o)
LongArrayBitVector	fast() Returns this bit vector.
void	fill(boolean value) Sets all bits this bit vector to the given boolean value (optional operation).
void	fill(long from, long to, boolean value) Fills a range of bits in this bit vector (optional operation).
void	flip() Flips all bits in this bit vector (optional operation).
void	flip(long from, long to) Flips a range of bits in this bit vector (optional operation).
boolean	getBoolean(long index) Returns the value of the specified bit.
static LongArrayBitVector	getInstance() Creates a new empty bit vector.
static LongArrayBitVector	getInstance(long capacity) Creates a new empty bit vector of given capacity.
long	getLong(long from, long to) Returns the specified bit range as a long.
int	hashCode() Returns a hash code for this bit vector.
long	length() Returns the number of bits in this bit vector.
LongArrayBitVector	length(long newLength) Sets the number of bits in this bit vector.
long	longestCommonPrefixLength(BitVector v) Returns the length of the greatest common prefix between this and the specified vector.
long	longestCommonPrefixLength(LongArrayBitVector v)
protected static long	mask(long index) Returns a mask having a 1 exactly at the bit bit(index).
long	nextOne(long index) Returns the position of the first bit set after the given position.
long	nextZero(long index) Returns the position of the first bit unset after the given position.
protected static int	numWords(long size) Returns the number of words that are necessary to hold the given number of bits.
static LongArrayBitVector	of(int... bit) Creates a new bit vector with given bits.
static LongArrayBitVector	ofLength(long length) Creates a new empty bit vector of given length.
BitVector	or(BitVector v) Performs a logical or between this bit vector and another one, leaving the result in this vector.
long	previousOne(long index) Returns the position of the first bit set before or at the given position.
long	previousZero(long index) Returns the position of the first bit unset before or at the given position.
boolean	removeBoolean(long index) Removes a bit with specified index (optional operation).
LongArrayBitVector	replace(BitVector bv) Replaces the content of this bit vector with another bit vector.
LongArrayBitVector	replace(LongArrayBitVector bv)
void	set(long index) Sets a bit in this bit vector (optional operation).
boolean	set(long index, boolean value) Sets the value of the specified bit (optional operation).
boolean	trim() Reduces as must as possible the size of the backing array.
protected static int	word(long index) Return the index of the word that holds a bit of specified index.
static LongArrayBitVector	wrap(long[] array) Wraps the given array of longs in a bit vector.
static LongArrayBitVector	wrap(long[] array, long size) Wraps the given array of longs in a bit vector for the given number of bits.
BitVector	xor(BitVector v) Performs a logical xor between this bit vector and another one, leaving the result in this vector.

Methods inherited from class it.unimi.dsi.bits.AbstractBitVector

add, add, add, add, append, asLongSet, clear, compareTo, compareTo, ensureIndex, ensureRestrictedIndex, equals, fill, fill, firstOne, firstZero, flip, flip, getBoolean, getInt, isPrefix, isProperPrefix, lastOne, lastZero, removeBoolean, set, set, set, size, size, size, size64, subList, subVector, subVector, toString

Methods inherited from class it.unimi.dsi.fastutil.booleans.AbstractBooleanBigList

add, addAll, addAll, addAll, addAll, addAll, addAll, addAll, addElements, addElements, contains, get, getElements, indexOf, indexOf, iterator, lastIndexOf, lastIndexOf, listIterator, listIterator, listIterator, peek, peekBoolean, pop, popBoolean, push, push, rem, remove, remove, removeElements, set, subList, top, topBoolean

Methods inherited from class it.unimi.dsi.fastutil.booleans.AbstractBooleanCollection

add, booleanIterator, contains, containsAll, containsAll, isEmpty, rem, remove, removeAll, removeAll, retainAll, retainAll, toArray, toArray, toArray, toBooleanArray, toBooleanArray

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.booleans.BooleanBigList

addAll, addAll, addAll, addElements, addElements, getElements, indexOf, iterator, lastIndexOf, listIterator, listIterator, removeElements, subList

Methods inherited from interface it.unimi.dsi.fastutil.BigList

add, addAll, get, indexOf, lastIndexOf, remove, set

Methods inherited from interface it.unimi.dsi.fastutil.booleans.BooleanCollection

addAll, booleanIterator, contains, containsAll, rem, removeAll, retainAll, toArray, toArray, toBooleanArray, toBooleanArray

Methods inherited from interface java.util.Collection

add, addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray

Methods inherited from interface it.unimi.dsi.fastutil.Stack

isEmpty

Field Detail

LOG2_BITS_PER_WORD

public static final int LOG2_BITS_PER_WORD

See Also:

Constant Field Values

BITS_PER_WORD

public static final int BITS_PER_WORD

See Also:

Constant Field Values

WORD_MASK

public static final int WORD_MASK

See Also:

Constant Field Values

LAST_BIT

public static final int LAST_BIT

See Also:

Constant Field Values

ALL_ONES

public static final long ALL_ONES

See Also:

Constant Field Values

LAST_BIT_MASK

public static final long LAST_BIT_MASK

See Also:

Constant Field Values

CHECKS

public static final boolean CHECKS

Whether this class has been compiled with index checks or not.

See Also:

Constant Field Values

length

protected long length

The number of bits in this vector.

bits

protected transient long[] bits

The backing array of this vector. Bit 0 of the first element contains bit 0 of the bit vector, bit 1 of the second element contains bit BITS_PER_WORD of the bit vector and so on.

Constructor Detail

LongArrayBitVector

protected LongArrayBitVector(long capacity)

Method Detail

numWords

protected static final int numWords(long size)

Returns the number of words that are necessary to hold the given number of bits.

Parameters:

size - a number of bits.

Returns:

the number of words that are necessary to hold the given number of bits.

word

protected static final int word(long index)

Return the index of the word that holds a bit of specified index.

Parameters:

index - the index of a bit, or -1.

Returns:

the index of the word that holds the bit of given index, or -1 if index is -1.

bit

protected static final int bit(long index)

Returns the inside-word index of the bit that would hold the bit of specified index.

Note that bit 0 is positioned in word 0, index 0, bit 1 in word 0, index 1, …, bit BITS_PER_WORD in word 0, index 0, bit BITS_PER_WORD + 1 in word 1, index 1, and so on.

Parameters:

index - the index of a bit.

Returns:

the inside-word index of the bit that would hold the bit of specified index.

mask

protected static final long mask(long index)

Returns a mask having a 1 exactly at the bit bit(index).

Parameters:

index - the index of a bit

Returns:

a mask having a 1 exactly at the bit bit(index).

getInstance

public static LongArrayBitVector getInstance(long capacity)

Creates a new empty bit vector of given capacity. The resulting vector will be able to contain capacity bits without reallocations of the backing array.

Note that this constructor creates an empty bit vector. If you want a cleared bit vector of a specified size, please use the ofLength(long) factory method.

Parameters:

capacity - the capacity (in bits) of the new bit vector.

Returns:

a new bit vector of given capacity.

getInstance

public static LongArrayBitVector getInstance()

Creates a new empty bit vector. No allocation is actually performed.

Returns:

a new bit vector with no capacity.

ofLength

public static LongArrayBitVector ofLength(long length)

Creates a new empty bit vector of given length.

Parameters:

length - the size (in bits) of the new bit vector.

of

public static LongArrayBitVector of(int... bit)

Creates a new bit vector with given bits.

Parameters:

bit - a list of bits that will be set in the newly created bit vector.

bits

public long[] bits()

Description copied from interface: BitVector

Returns the bits in this bit vector as an array of longs, not to be modified.

Specified by:

bits in interface BitVector

Overrides:

bits in class AbstractBitVector

Returns:

an array of longs whose first BitVector.length() bits contain the bits of this bit vector. The array cannot be modified.

length

public long length()

Description copied from interface: BitVector

Returns the number of bits in this bit vector.

If the number of bits in this vector is smaller than or equal to Integer.MAX_VALUE, this method is semantically equivalent to List.size(). In any case, this method is semantically equivalent to Size64.size64().

Specified by:

length in interface BitVector

Returns:

the number of bits in this bit vector.

ensureCapacity

public LongArrayBitVector ensureCapacity(long numBits)

Ensures that this bit vector can hold the specified number of bits.

This method uses LongArrays.grow(long[], int, int) to ensure that there is enough space for the given number of bits. As a consequence, the actual length of the long array allocated might be larger than expected.

Parameters:

numBits - the number of bits that this vector must be able to contain.

Returns:

this bit vector.

length

public LongArrayBitVector length(long newLength)

Description copied from interface: BitVector

Sets the number of bits in this bit vector.

It is expected that this method will try to allocate exactly the necessary space.

If the number of bits in this vector is smaller than or equal to Integer.MAX_VALUE, this method is semantically equivalent to BooleanList.size(int). In any case, this method is semantically essentially equivalent to BigList.size(long).

Specified by:

length in interface BitVector

Overrides:

length in class AbstractBitVector

Returns:

this bit vector.

fill

public void fill(boolean value)

Description copied from interface: BitVector

Sets all bits this bit vector to the given boolean value (optional operation).

Specified by:

fill in interface BitVector

Overrides:

fill in class AbstractBitVector

fill

public void fill(long from,
                 long to,
                 boolean value)

Description copied from interface: BitVector

Fills a range of bits in this bit vector (optional operation).

Specified by:

fill in interface BitVector

Overrides:

fill in class AbstractBitVector

Parameters:

from - the first index (inclusive).

to - the last index (not inclusive).

value - the value (true or false).

flip

public void flip()

Description copied from interface: BitVector

Flips all bits in this bit vector (optional operation).

Specified by:

flip in interface BitVector

Overrides:

flip in class AbstractBitVector

flip

public void flip(long from,
                 long to)

Description copied from interface: BitVector

Flips a range of bits in this bit vector (optional operation).

Specified by:

flip in interface BitVector

Overrides:

flip in class AbstractBitVector

Parameters:

from - the first index (inclusive).

to - the last index (not inclusive).

trim

public boolean trim()

Reduces as must as possible the size of the backing array.

Returns:

true if some trimming was actually necessary.

clear

public void clear()

Sets the size of this bit vector to 0.

Note that this method does not try to reallocate that backing array. If you want to force that behaviour, call trim() afterwards.

Specified by:

clear in interface Collection<Boolean>

Overrides:

clear in class AbstractBitVector

copy

public LongArrayBitVector copy(long from,
                               long to)

Description copied from interface: BitVector

Returns a copy of a part of this bit vector.

Specified by:

copy in interface BitVector

Overrides:

copy in class AbstractBitVector

Parameters:

from - the starting bit, inclusive.

to - the ending bit, not inclusive.

Returns:

a copy of the part of this bit vector going from bit from (inclusive) to bit to (not inclusive)

copy

public LongArrayBitVector copy()

Description copied from interface: BitVector

Returns a copy of this bit vector.

Specified by:

copy in interface BitVector

Overrides:

copy in class AbstractBitVector

Returns:

a copy of this bit vector.

fast

public LongArrayBitVector fast()

Returns this bit vector.

Specified by:

fast in interface BitVector

Overrides:

fast in class AbstractBitVector

Returns:

this bit vector.

copy

public static LongArrayBitVector copy(BitVector bv)

Returns a copy of the given bit vector.

This method uses BitVector.getLong(long, long) on Long.SIZE boundaries to copy at high speed.

Parameters:

bv - a bit vector.

Returns:

an instance of this class containing a copy of the given vector.

getBoolean

public boolean getBoolean(long index)

Description copied from interface: BitVector

Returns the value of the specified bit.

This method is semantically equivalent to BooleanList.getBoolean(int), but it gives access to long indices.

Specified by:

getBoolean in interface BitVector

Specified by:

getBoolean in interface BooleanBigList

Parameters:

index - the index of a bit.

Returns:

the value of the specified bit.

set

public boolean set(long index,
                   boolean value)

Description copied from interface: BitVector

Sets the value of the specified bit (optional operation).

This method is semantically equivalent to BooleanList.set(int,boolean), but it gives access to long indices.

Specified by:

set in interface BitVector

Specified by:

set in interface BooleanBigList

Overrides:

set in class AbstractBitVector

Parameters:

index - the index of a bit.

value - the new value.

set

public void set(long index)

Description copied from interface: BitVector

Sets a bit in this bit vector (optional operation).

Specified by:

set in interface BitVector

Overrides:

set in class AbstractBitVector

Parameters:

index - the index of a bit.

clear

public void clear(long index)

Description copied from interface: BitVector

Clears a bit in this bit vector (optional operation).

Specified by:

clear in interface BitVector

Overrides:

clear in class AbstractBitVector

Parameters:

index - the index of a bit.

add

public void add(long index,
                boolean value)

Description copied from interface: BitVector

Adds a bit with specified value at the specified index (optional operation).

This method is semantically equivalent to BooleanList.add(int,boolean), but it gives access to long indices.

Specified by:

add in interface BitVector

Specified by:

add in interface BooleanBigList

Overrides:

add in class AbstractBitVector

Parameters:

index - the index of a bit.

value - the value that will be inserted at position index.

removeBoolean

public boolean removeBoolean(long index)

Description copied from interface: BitVector

Removes a bit with specified index (optional operation).

This method is semantically equivalent to BooleanList.removeBoolean(int), but it gives access to long indices.

Specified by:

removeBoolean in interface BitVector

Specified by:

removeBoolean in interface BooleanBigList

Overrides:

removeBoolean in class AbstractBitVector

Parameters:

index - the index of a bit.

Returns:

the previous value of the bit.

append

public LongArrayBitVector append(long value,
                                 int width)

Description copied from interface: BitVector

Appends the less significant bits of a long integer to this bit vector.

Specified by:

append in interface BitVector

Overrides:

append in class AbstractBitVector

Parameters:

value - a value to be appended

width - the number of less significant bits to be added to this bit vector.

Returns:

this bit vector.

getLong

public long getLong(long from,
                    long to)

Description copied from interface: BitVector

Returns the specified bit range as a long.

Note that bit 0 of the returned long will be bit from of this bit vector.

Implementations are invited to provide high-speed implementations for the case in which from is a multiple of Long.SIZE and to is from + Long.SIZE (or less, in case the vector length is exceeded). This behaviour make it possible to implement high-speed hashing, copies, etc.

Specified by:

getLong in interface BitVector

Overrides:

getLong in class AbstractBitVector

Parameters:

from - the starting bit (inclusive).

to - the ending bit (exclusive).

Returns:

the long value contained in the specified bits.

count

public long count()

Description copied from interface: BitVector

Counts the number of bits set to true in this bit vector.

Specified by:

count in interface BitVector

Overrides:

count in class AbstractBitVector

Returns:

the number of bits set to true in this bit vector.

nextOne

public long nextOne(long index)

Description copied from interface: BitVector

Returns the position of the first bit set after the given position.

Specified by:

nextOne in interface BitVector

Overrides:

nextOne in class AbstractBitVector

Returns:

the first bit set after position index (inclusive), or -1 if no such bit exists.

previousOne

public long previousOne(long index)

Description copied from interface: BitVector

Returns the position of the first bit set before or at the given position.

Specified by:

previousOne in interface BitVector

Overrides:

previousOne in class AbstractBitVector

Returns:

the first bit set before or at the given position, or -1 if no such bit exists.

nextZero

public long nextZero(long index)

Description copied from interface: BitVector

Returns the position of the first bit unset after the given position.

Specified by:

nextZero in interface BitVector

Overrides:

nextZero in class AbstractBitVector

Returns:

the first bit unset after position index (inclusive), or -1 if no such bit exists.

previousZero

public long previousZero(long index)

Description copied from interface: BitVector

Returns the position of the first bit unset before or at the given position.

Specified by:

previousZero in interface BitVector

Overrides:

previousZero in class AbstractBitVector

Returns:

the first bit unset before or at the given position, or -1 if no such bit exists.

longestCommonPrefixLength

public long longestCommonPrefixLength(BitVector v)

Description copied from interface: BitVector

Returns the length of the greatest common prefix between this and the specified vector.

Specified by:

longestCommonPrefixLength in interface BitVector

Overrides:

longestCommonPrefixLength in class AbstractBitVector

Parameters:

v - a bit vector.

Returns:

the length of the greatest common prefix.

longestCommonPrefixLength

public long longestCommonPrefixLength(LongArrayBitVector v)

and

public BitVector and(BitVector v)

Description copied from interface: BitVector

Performs a logical and between this bit vector and another one, leaving the result in this vector.

Specified by:

and in interface BitVector

Overrides:

and in class AbstractBitVector

Parameters:

v - a bit vector.

Returns:

this bit vector.

or

public BitVector or(BitVector v)

Description copied from interface: BitVector

Performs a logical or between this bit vector and another one, leaving the result in this vector.

Specified by:

or in interface BitVector

Overrides:

or in class AbstractBitVector

Parameters:

v - a bit vector.

Returns:

this bit vector.

xor

public BitVector xor(BitVector v)

Description copied from interface: BitVector

Performs a logical xor between this bit vector and another one, leaving the result in this vector.

Specified by:

xor in interface BitVector

Overrides:

xor in class AbstractBitVector

Parameters:

v - a bit vector.

Returns:

this bit vector.

wrap

public static LongArrayBitVector wrap(long[] array,
                                      long size)

Wraps the given array of longs in a bit vector for the given number of bits.

Note that all bits in array beyond that of index size must be unset, or an exception will be thrown.

Parameters:

array - an array of longs.

size - the number of bits of the newly created bit vector.

Returns:

a bit vector of size size using array as backing array.

wrap

public static LongArrayBitVector wrap(long[] array)

Wraps the given array of longs in a bit vector.

Parameters:

array - an array of longs.

Returns:

a bit vector of size array.length * Long.SIZE using array as backing array.

clone

public LongArrayBitVector clone()
                         throws CloneNotSupportedException

Returns a cloned copy of this bit vector.

This method is functionally equivalent to copy(), except that copy() trims the backing array.

Overrides:

clone in class Object

Returns:

a copy of this bit vector.

Throws:

CloneNotSupportedException

replace

public LongArrayBitVector replace(LongArrayBitVector bv)

replace

public LongArrayBitVector replace(BitVector bv)

Description copied from interface: BitVector

Replaces the content of this bit vector with another bit vector.

Specified by:

replace in interface BitVector

Overrides:

replace in class AbstractBitVector

Parameters:

bv - a bit vector.

Returns:

this bit vector.

equals

public boolean equals(Object o)

Specified by:

equals in interface Collection<Boolean>

Overrides:

equals in class AbstractBitVector

equals

public boolean equals(LongArrayBitVector v)

equals

public boolean equals(LongArrayBitVector v,
                      long start,
                      long end)

hashCode

public int hashCode()

Description copied from interface: BitVector

Returns a hash code for this bit vector.

Hash codes for bit vectors are defined as follows:

 final long length = length();
 long fullLength = length - length % Long.SIZE;
 long h = 0x9e3779b97f4a7c13L ^ length; 
 for( long i = 0; i < fullLength; i += Long.SIZE ) h ^= ( h << 5 ) + getLong( i, i + Long.SIZE ) + ( h >>> 2 );
 if ( length != fullLength ) h ^= ( h << 5 ) + getLong( fullLength, length ) + ( h >>> 2 );
 (int)( ( h >>> 32 ) ^ h );
 

The last value is the hash code of the bit vector. This hashing is based on shift-add-xor hashing (M.V. Ramakrishna and Justin Zobel, “Performance in practice of string hashing functions”, Proc. of the Fifth International Conference on Database Systems for Advanced Applications, 1997, pages 215−223).

The returned value is not a high-quality hash such as Jenkins's, but it can be computed very quickly; in any case, 32 bits are too few for a high-quality hash to be used in large-scale applications.

Important: all bit vector implementations are required to return the value defined here. The simplest way to obtain this result is to subclass AbstractBitVector.

Specified by:

hashCode in interface BitVector

Specified by:

hashCode in interface Collection<Boolean>

Overrides:

hashCode in class AbstractBitVector

Returns:

a hash code for this bit vector.

asLongBigList

public LongBigList asLongBigList(int width)

Description copied from interface: BitVector

Returns a view of this bit vector as a list of nonnegative integers of specified width.

More formally, getLong(p) will return the nonnegative integer defined by the bits starting at p * width (bit 0, inclusive) and ending at (p + 1) * width (bit width − 1, exclusive).

Specified by:

asLongBigList in interface BitVector

Overrides:

asLongBigList in class AbstractBitVector