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package com.diozero.util;
/*
* #%L
* Organisation: diozero
* Project: diozero - Core
* Filename: MutableInt.java
*
* This file is part of the diozero project. More information about this project
* can be found at https://www.diozero.com/.
* %%
* Copyright (C) 2016 - 2021 diozero
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
public class MutableInt {
private int value;
public MutableInt() {
this(0);
}
public MutableInt(final int value) {
this.value = value;
}
public int getValue() {
return value;
}
public boolean isBitSet(final int bit) {
return isBitSet(value, bit);
}
public MutableInt setValue(final int value) {
this.value = value;
return this;
}
public MutableInt setBit(final int bit) {
value = setBitValue(value, bit, true);
return this;
}
public MutableInt unsetBit(final int bit) {
value = setBitValue(value, bit, false);
return this;
}
public MutableInt setBitValue(final int bit, final boolean on) {
value = setBitValue(value, bit, on);
return this;
}
/**
* Update only the bits as specified by mask with the specified bits
*
* @param mask a bit mask with 1s specifying the bits to update
* @param bits the new bits to apply to the value
* @return this object
*/
public MutableInt updateWithMaskedData(final int mask, final int bits) {
value = updateValueWithMaskedData(value, mask, bits);
return this;
}
public boolean equals(final int b) {
return value == b;
}
// Static methods
public static int setBitValue(final int value, final int bit, final boolean on) {
int mask = getBitMask(bit);
int new_value = value;
if (on) {
new_value |= mask;
} else {
new_value &= ~mask;
}
return new_value;
}
public static int getBitMask(final int... bits) {
int mask = 0;
for (int bit : bits) {
mask |= getBitMask(bit);
}
return mask;
}
public static int getBitMask(final int bit) {
if (bit > 31) {
throw new IllegalArgumentException("Bit (" + bit + ") out of range for int");
}
return 1 << bit;
}
public static boolean isBitSet(final int value, final int bit) {
return (value & getBitMask(bit)) != 0;
}
/**
* Update only the bits as specified by mask with the specified bits
*
* @param value the value to update
* @param mask a bit mask with 1s specifying the bits to update
* @param data the new bits to apply to the value
* @return the updated value
*/
public static int updateValueWithMaskedData(final int value, final int mask, final int data) {
return (value & ~mask) | (data & mask);
}
}
