程序包 net.dongliu.commons.io

类 Bits

java.lang.Object

net.dongliu.commons.io.Bits

public class Bits
extends java.lang.Object

Util for bit operation. The methods of this class do not do any range check, caller should take care this.

构造器概要

构造器

构造器	说明
Bits()

方法概要

修饰符和类型	方法	说明
static int	clear(int v, int idx)	Clear the bit in value
static int	clear(int v, int from, int to)	Clear bits of value, in range [from, to).The indexes are starts with 0, from low to high.
static long	clear(long v, int idx)	Clear the bit in value
static long	clear(long v, int from, int to)	Clear bits of value, in range [from, to).
static int	flip(int v, int idx)	Set the bit in value to the complement of current.
static int	flip(int v, int from, int to)	Set bits of value, in range [from, to), to the complement of current values.
static long	flip(long v, int idx)	Set the bit in value to the complement of current.
static long	flip(long v, int from, int to)	Set bits of value, in range [from, to), to the complement of current values.
static int	set(int v, int idx)	Set the bit in value
static int	set(int v, int from, int to)	Set bits of value, in range [from, to).
static long	set(long v, int idx)	Set the bit in value
static long	set(long v, int from, int to)	Set bits of value, in range [from, to).
static int	take(int v, int from, int to)	Take bits of value, in range [from, to), to be a new value.
static long	take(long v, int from, int to)	Take bits of value, in range [from, to), to be a new value.
static int	takeDown(int v, int from, int to)	Take bits of value, in range [from, to), and then shift to lowest bits, to be a new value.
static long	takeDown(long v, int from, int to)	Take bits of value, in range [from, to), and then shift to lowest bits, to be a new value.
static boolean	test(int v, int idx)	If the bit in value is set.
static boolean	test(long v, int idx)	If the bit in value is set.

从类继承的方法 java.lang.Object

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

构造器详细资料

Bits

public Bits()

方法详细资料

test

public static boolean test(int v,
                           int idx)

If the bit in value is set.

参数:

v - the value

idx - bit index, starts with 0, from low to high

返回:

if bit is set

set

public static int set(int v,
                      int idx)

Set the bit in value

参数:

v - the value

idx - bit index, starts with 0, from low to high

返回:

new value with the bit set

clear

public static int clear(int v,
                        int idx)

Clear the bit in value

参数:

v - the value

idx - bit index, starts with 0, from low to high

返回:

new value with the bit cleared

flip

public static int flip(int v,
                       int idx)

Set the bit in value to the complement of current.

参数:

v - the value

idx - bit index, starts with 0, from low to high

返回:

new value with the bit flipped

set

public static int set(int v,
                      int from,
                      int to)

Set bits of value, in range [from, to). The indexes are starts with 0, from low to high.

参数:

v - the original value

from - the from bit index, include

to - the to bit index, exclude

返回:

the value with bits set

clear

public static int clear(int v,
                        int from,
                        int to)

Clear bits of value, in range [from, to).The indexes are starts with 0, from low to high.

参数:

v - the original value

from - the from bit index, include

to - the to bit index, exclude

返回:

the value with bits cleared

flip

public static int flip(int v,
                       int from,
                       int to)

Set bits of value, in range [from, to), to the complement of current values. The indexes are starts with 0, from low to high.

参数:

v - the original value

from - the from bit index, include

to - the to bit index, exclude

返回:

the value with bits flipped

take

public static int take(int v,
                       int from,
                       int to)

Take bits of value, in range [from, to), to be a new value. The other bits of new value is zero. The indexes are starts with 0, from low to high.

参数:

v - the original value

from - the from bit index, include

to - the to bit index, exclude

返回:

the new value

takeDown

public static int takeDown(int v,
                           int from,
                           int to)

Take bits of value, in range [from, to), and then shift to lowest bits, to be a new value. The other bits of new value is zero. The indexes are starts with 0, from low to high.

参数:

v - the original value

from - the from bit index, include

to - the to bit index, exclude

返回:

the new value

test

public static boolean test(long v,
                           int idx)

If the bit in value is set.

参数:

v - the value

idx - bit index, starts with 0, from low to high

返回:

if bit is set

set

public static long set(long v,
                       int idx)

Set the bit in value

参数:

v - the value

idx - bit index, starts with 0, from low to high

返回:

new value with the bit set

clear

public static long clear(long v,
                         int idx)

Clear the bit in value

参数:

v - the value

idx - bit index, starts with 0, from low to high

返回:

new value with the bit cleared

flip

public static long flip(long v,
                        int idx)

Set the bit in value to the complement of current.

参数:

v - the value

idx - bit index, starts with 0, from low to high

返回:

new value with the bit flipped

set

public static long set(long v,
                       int from,
                       int to)

Set bits of value, in range [from, to). The indexes are starts with 0, from low to high.

参数:

v - the original value

from - the from bit index, include

to - the to bit index, exclude

返回:

the value with bits set

clear

public static long clear(long v,
                         int from,
                         int to)

Clear bits of value, in range [from, to). The indexes are starts with 0, from low to high.

参数:

v - the original value

from - the from bit index, include

to - the to bit index, exclude

返回:

the value with bits cleared

flip

public static long flip(long v,
                        int from,
                        int to)

Set bits of value, in range [from, to), to the complement of current values. The indexes are starts with 0, from low to high.

参数:

v - the original value

from - the from bit index, include

to - the to bit index, exclude

返回:

the value with bits flipped

take

public static long take(long v,
                        int from,
                        int to)

Take bits of value, in range [from, to), to be a new value. The other bits of new value is zero. The indexes are starts with 0, from low to high.

参数:

v - the original value

from - the from bit index, include

to - the to bit index, exclude

返回:

the new value

takeDown

public static long takeDown(long v,
                            int from,
                            int to)

Take bits of value, in range [from, to), and then shift to lowest bits, to be a new value. The other bits of new value is zero. The indexes are starts with 0, from low to high.

参数:

v - the original value

from - the from bit index, include

to - the to bit index, exclude

返回:

the new value