PandaLib/pandalib-net/src/main/java/fr/pandacube/lib/net/Array8Bit.java

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package fr.pandacube.lib.net;
import java.util.Arrays;
import com.google.common.annotations.Beta;
@Beta
public class Array8Bit {
public static final int BIT_COUNT = Byte.SIZE;
private boolean[] values = new boolean[BIT_COUNT];
public Array8Bit(byte b) {
fromByte(b);
}
/**
* @param bits (index 0 is the lowest significant bit)
*/
public Array8Bit(boolean[] bits) {
if (bits == null || bits.length != BIT_COUNT)
throw new IllegalArgumentException("bits is null or bits.length != "+BIT_COUNT);
values = Arrays.copyOf(bits, BIT_COUNT);
}
/**
* i = 0 is the lowest significant bit
*/
public boolean getBit(int i) {
return values[i];
}
/**
* i = 0 is the lowest significant bit
*/
public void setBit(int i, boolean b) {
values[i] = b;
}
public void fromByte(byte b) {
int mask = 1;
for (int i = 0; i < BIT_COUNT; i++) {
values[i] = (b & mask) != 0;
mask <<= 1;
}
}
public byte toByte() {
byte b = 0;
for (int i=BIT_COUNT-1; i>=0; i--) {
b <<= 1;
if (values[i]) b |= 1;
}
return b;
}
}