Dexmaker 1.5 · org.droidparts.dexmaker.dx.util.Bits

Access	Constructor and Description
private	Bits() This class is uninstantiable.

Method Summary

Modifier and Type	Method and Description
public static boolean	Returns: `true` if any bit is set to `true` in the indicated range anyInRange(int[] `non-null;` bit set to operate on bits, int `>= 0;` index of the first bit in the range (inclusive) start, int `>= 0;` index of the last bit in the range (exclusive) end) Returns whether any bits are set to `true` in the specified range.
public static int	Returns: `>= 0;` the bit count (aka population count) of the set bitCount(int[] `non-null;` bit set to operate on bits) Gets the number of bits set to `true` in the given bit set.
public static void	clear(int[] `non-null;` bit set to operate on bits, int `>= 0, < getMax(set);` which bit idx) Sets the given bit to `false`.
public static int	Returns: `>= -1;` lowest-order bit set at or after `idx`, or `-1` if there is no appropriate bit index to return findFirst(int[] `non-null;` bit set to operate on bits, int `>= 0;` minimum index to return idx) Finds the lowest-order bit set at or after the given index in the given bit set.
public static int	Returns: `>= -1;` lowest-order bit set at or after `idx`, or `-1` if there is no appropriate bit index to return findFirst(int the value in question value, int 0..31 the minimum bit index to return idx) Finds the lowest-order bit set at or after the given index in the given `int`.
public static boolean	Returns: the value of the indicated bit get(int[] `non-null;` bit set to operate on bits, int `>= 0, < getMax(set);` which bit idx) Gets the value of the bit at the given index.
public static int	Returns: `>= 0;` the maximum index (exclusive) that may be set getMax(int[] `non-null;` bit set in question bits) Gets the maximum index (exclusive) for the given bit set.
public static boolean	Returns: `true` iff all bits are `false` isEmpty(int[] `non-null;` bit set to operate on bits) Returns whether or not the given bit set is empty, that is, whether no bit is set to `true`.
public static int[]	Returns: `non-null;` an appropriately-constructed instance makeBitSet(int `>= 0;` the maximum bit index (exclusive) max) Constructs a bit set to contain bits up to the given index (exclusive).
public static void	or(int[] `non-null;` int array to be ored with other argument. This argument is modified. a, int[] `non-null;` int array to be ored into `a`. This argument is not modified. b) Ors bit array `b` into bit array `a`.
public static void	set(int[] `non-null;` bit set to operate on bits, int `>= 0, < getMax(set);` which bit idx, boolean the new value for the bit value) Sets the given bit to the given value.
public static void	set(int[] `non-null;` bit set to operate on bits, int `>= 0, < getMax(set);` which bit idx) Sets the given bit to `true`.
public static String	toHuman(int[] bits)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Bits	back to summary
private Bits() This class is uninstantiable.

Method Detail

anyInRange back to summary

anyInRange	back to summary
public static boolean anyInRange(int[] bits, int start, int end) Returns whether any bits are set to `true` in the specified range. Parameters bits:int[] `non-null;` bit set to operate on start:int `>= 0;` index of the first bit in the range (inclusive) end:int `>= 0;` index of the last bit in the range (exclusive) Returns:boolean `true` if any bit is set to `true` in the indicated range

public static boolean anyInRange(int[] bits, int start, int end)

Returns whether any bits are set to true in the specified range.

Parameters

bits:int[]: non-null; bit set to operate on
start:int: >= 0; index of the first bit in the range (inclusive)
end:int: >= 0; index of the last bit in the range (exclusive)

Returns:boolean

true if any bit is set to true in the indicated range

bitCount back to summary

bitCount	back to summary
public static int bitCount(int[] bits) Gets the number of bits set to `true` in the given bit set. Parameters bits:int[] `non-null;` bit set to operate on Returns:int `>= 0;` the bit count (aka population count) of the set

public static int bitCount(int[] bits)

Gets the number of bits set to true in the given bit set.

Parameters

bits:int[]: non-null; bit set to operate on

Returns:int

>= 0; the bit count (aka population count) of the set

clear back to summary

clear	back to summary
public static void clear(int[] bits, int idx) Sets the given bit to `false`. Parameters bits:int[] `non-null;` bit set to operate on idx:int `>= 0, < getMax(set);` which bit

public static void clear(int[] bits, int idx)

Sets the given bit to false.

Parameters

bits:int[]: non-null; bit set to operate on
idx:int: >= 0, < getMax(set); which bit

findFirst back to summary

findFirst	back to summary
public static int findFirst(int[] bits, int idx) Finds the lowest-order bit set at or after the given index in the given bit set. Parameters bits:int[] `non-null;` bit set to operate on idx:int `>= 0;` minimum index to return Returns:int `>= -1;` lowest-order bit set at or after `idx`, or `-1` if there is no appropriate bit index to return

public static int findFirst(int[] bits, int idx)

Finds the lowest-order bit set at or after the given index in the given bit set.

Parameters

bits:int[]: non-null; bit set to operate on
idx:int: >= 0; minimum index to return

Returns:int

>= -1; lowest-order bit set at or after idx, or -1 if there is no appropriate bit index to return

findFirst back to summary

findFirst	back to summary
public static int findFirst(int value, int idx) Finds the lowest-order bit set at or after the given index in the given `int`. Parameters value:int the value in question idx:int 0..31 the minimum bit index to return Returns:int `>= -1;` lowest-order bit set at or after `idx`, or `-1` if there is no appropriate bit index to return

public static int findFirst(int value, int idx)

Finds the lowest-order bit set at or after the given index in the given int.

Parameters

value:int: the value in question
idx:int: 0..31 the minimum bit index to return

Returns:int

>= -1; lowest-order bit set at or after idx, or -1 if there is no appropriate bit index to return

get back to summary

get	back to summary
public static boolean get(int[] bits, int idx) Gets the value of the bit at the given index. Parameters bits:int[] `non-null;` bit set to operate on idx:int `>= 0, < getMax(set);` which bit Returns:boolean the value of the indicated bit

public static boolean get(int[] bits, int idx)

Gets the value of the bit at the given index.

Parameters

bits:int[]: non-null; bit set to operate on
idx:int: >= 0, < getMax(set); which bit

Returns:boolean

the value of the indicated bit

getMax back to summary

getMax	back to summary
public static int getMax(int[] bits) Gets the maximum index (exclusive) for the given bit set. Parameters bits:int[] `non-null;` bit set in question Returns:int `>= 0;` the maximum index (exclusive) that may be set

public static int getMax(int[] bits)

Gets the maximum index (exclusive) for the given bit set.

Parameters

bits:int[]: non-null; bit set in question

Returns:int

>= 0; the maximum index (exclusive) that may be set

isEmpty back to summary

isEmpty	back to summary
public static boolean isEmpty(int[] bits) Returns whether or not the given bit set is empty, that is, whether no bit is set to `true`. Parameters bits:int[] `non-null;` bit set to operate on Returns:boolean `true` iff all bits are `false`

public static boolean isEmpty(int[] bits)

Returns whether or not the given bit set is empty, that is, whether no bit is set to true.

Parameters

bits:int[]: non-null; bit set to operate on

Returns:boolean

true iff all bits are false

makeBitSet back to summary

makeBitSet	back to summary
public static int[] makeBitSet(int max) Constructs a bit set to contain bits up to the given index (exclusive). Parameters max:int `>= 0;` the maximum bit index (exclusive) Returns:int[] `non-null;` an appropriately-constructed instance

public static int[] makeBitSet(int max)

Constructs a bit set to contain bits up to the given index (exclusive).

Parameters

max:int: >= 0; the maximum bit index (exclusive)

Returns:int[]

non-null; an appropriately-constructed instance

or back to summary

or	back to summary
public static void or(int[] a, int[] b) Ors bit array `b` into bit array `a`. `a.length` must be greater than or equal to `b.length`. Parameters a:int[] `non-null;` int array to be ored with other argument. This argument is modified. b:int[] `non-null;` int array to be ored into `a`. This argument is not modified.

public static void or(int[] a, int[] b)

Ors bit array b into bit array a. a.length must be greater than or equal to b.length.

Parameters

a:int[]: non-null; int array to be ored with other argument. This argument is modified.
b:int[]: non-null; int array to be ored into a. This argument is not modified.

set back to summary

set	back to summary
public static void set(int[] bits, int idx, boolean value) Sets the given bit to the given value. Parameters bits:int[] `non-null;` bit set to operate on idx:int `>= 0, < getMax(set);` which bit value:boolean the new value for the bit

public static void set(int[] bits, int idx, boolean value)

Sets the given bit to the given value.

Parameters

bits:int[]: non-null; bit set to operate on
idx:int: >= 0, < getMax(set); which bit
value:boolean: the new value for the bit

set back to summary

set	back to summary
public static void set(int[] bits, int idx) Sets the given bit to `true`. Parameters bits:int[] `non-null;` bit set to operate on idx:int `>= 0, < getMax(set);` which bit

public static void set(int[] bits, int idx)

Sets the given bit to true.

Parameters

bits:int[]: non-null; bit set to operate on
idx:int: >= 0, < getMax(set); which bit

toHuman	back to summary
public static String toHuman(int[] bits)

public final Class Bits

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Constructor Detail

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