mirror of
https://github.com/DSheirer/sdrtrunk.git
synced 2026-11-12 08:37:25 -05:00
Updates pull request from Roman Tsypuk to convert the build system from
ant to gradle. Removes linux and windows application launch scripts and produces an executable jar with all resources included.
This commit is contained in:
901
src/main/java/io/github/dsheirer/bits/BinaryMessage.java
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901
src/main/java/io/github/dsheirer/bits/BinaryMessage.java
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@@ -0,0 +1,901 @@
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/*******************************************************************************
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* SDR Trunk
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* Copyright (C) 2014 Dennis Sheirer
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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******************************************************************************/
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package io.github.dsheirer.bits;
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import io.github.dsheirer.edac.CRC;
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import org.apache.commons.lang3.Validate;
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import java.util.BitSet;
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public class BinaryMessage extends BitSet
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{
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private static final long serialVersionUID = 1L;
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/**
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* Logical (ie constructed) size of this bitset, despite the actual size of
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* the super bitset that this class is based on
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*/
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private int mSize = 0;
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/**
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* Pointer to the next fill index location, when adding bits to this bitset
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* one at a time.
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*/
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private int mPointer = 0;
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/**
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* Bitset that buffers bits added one at a time, up to the size of the this
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* bitset.
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*
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* Note: the super class bitset behind this class may have a size larger
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* that the size parameter specified.
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* @param size
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*/
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/**
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* Used for temporary storage of CRC check results when we're passing this
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* message to an EDAC function.
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*/
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private CRC mCRC;
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public BinaryMessage( int size )
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{
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super( size );
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mSize = size;
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}
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/**
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* Constructs a bitset buffer and preloads it with the bits contained in
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* the bitsToPreload parameter. If the bitsToPreload are longer than the
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* size of the bitset, only those bits that fit will be preloaded
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*
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* @param size
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* @param bitsToPreload
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*/
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public BinaryMessage( int size, boolean[] bitsToPreload )
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{
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this( size );
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int pointer = 0;
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while( !this.isFull() && pointer < bitsToPreload.length )
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{
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try
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{
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this.add( bitsToPreload[ pointer ] );
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}
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catch( BitSetFullException e )
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||||
{
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e.printStackTrace();
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}
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pointer++;
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}
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}
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/**
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* Constructs a new BitSetBuffer from an existing one
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*/
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private BinaryMessage( BinaryMessage toCopyFrom )
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{
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this( toCopyFrom.size() );
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this.or( toCopyFrom );
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this.mPointer = toCopyFrom.pointer();
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}
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||||
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public BinaryMessage( BitSet bitset, int size )
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||||
{
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this( size );
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this.or( bitset );
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this.mPointer = size - 1;
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}
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public BinaryMessage(byte[] data)
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{
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this(BitSet.valueOf(data), data.length * 8);
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}
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/**
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* Returns a mew binary message containing the bits from (inclusive) to
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* end (exclusive).
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*
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* @param start
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* @param end
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* @return
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*/
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public BinaryMessage getSubMessage( int start, int end )
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{
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BitSet subset = this.get( start, end );
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return new BinaryMessage( subset, end - start );
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||||
}
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public CRC getCRC()
|
||||
{
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return mCRC;
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}
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public void setCRC( CRC crc )
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||||
{
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mCRC = crc;
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}
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/**
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* Indicates the number of bit errors that were corrected in this message.
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*
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* @see CorrectedBinaryMessage subclass that supports setting this value
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* @return number of corrected bits in this message
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*/
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public int getCorrectedBitCount()
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||||
{
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return 0;
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}
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/**
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* Current pointer index
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||||
*/
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public int pointer()
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||||
{
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return mPointer;
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}
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||||
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||||
/**
|
||||
* Sets the pointer to a specific value
|
||||
* @param index
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||||
*/
|
||||
public void setPointer( int index )
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||||
{
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||||
mPointer = index;
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}
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||||
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||||
/**
|
||||
* Moves the current pointer position left (negative adjustment) or
|
||||
* right (positive adjustment)
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||||
*/
|
||||
public void adjustPointer( int adjustment )
|
||||
{
|
||||
mPointer += adjustment;
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||||
}
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||||
|
||||
/**
|
||||
* Static method to construct a new BitSetBuffer, preloaded with the bits
|
||||
* from the preload parameter, and then filled with the bits from the
|
||||
* second bitsetbuffer parameter.
|
||||
*
|
||||
* @param preloadBits - boolean array of bits to be prepended to the new
|
||||
* bitset
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* @param bitsetToAppend - full bitset to be appended to the residual bits array
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||||
* @return - new Bitset preloaded with residual bits and new bitset
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||||
*/
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public static BinaryMessage merge( boolean[] preloadBits, BinaryMessage bitsetToAppend )
|
||||
{
|
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BinaryMessage returnValue = new BinaryMessage( preloadBits.length + bitsetToAppend.size(), preloadBits );
|
||||
|
||||
int pointer = 0;
|
||||
|
||||
while( pointer < bitsetToAppend.size() && !returnValue.isFull() )
|
||||
{
|
||||
try
|
||||
{
|
||||
returnValue.add( bitsetToAppend.get( pointer ) );
|
||||
}
|
||||
catch( BitSetFullException e )
|
||||
{
|
||||
e.printStackTrace();
|
||||
}
|
||||
|
||||
pointer++;
|
||||
}
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||||
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||||
return returnValue;
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||||
}
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||||
/**
|
||||
* Returns a (new) copy of this bitsetbuffer
|
||||
* @return
|
||||
*/
|
||||
public BinaryMessage copy()
|
||||
{
|
||||
return new BinaryMessage( this );
|
||||
}
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||||
|
||||
public boolean isFull()
|
||||
{
|
||||
return mPointer >= mSize;
|
||||
}
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||||
|
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/**
|
||||
* Overrides the in-build size() method of the bitset and returns the value
|
||||
* specified at instantiation. The actual bitset size may be larger than
|
||||
* this value, and that size is managed by the super class.
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||||
*/
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||||
@Override
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||||
public int size()
|
||||
{
|
||||
return mSize;
|
||||
}
|
||||
|
||||
public void setSize( int size )
|
||||
{
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||||
mSize = size;
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||||
}
|
||||
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||||
/**
|
||||
* Clears (sets to false or 0) the bits in this bitset and resets the
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||||
* pointer to zero.
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*/
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@Override
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||||
public void clear()
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||||
{
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this.clear( 0, mSize );
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mPointer = 0;
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||||
}
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||||
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||||
/**
|
||||
* Adds a the bit parameters to this bitset, placing it in the index
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||||
* specified by mPointer, and incrementing mPointer to prepare for the next
|
||||
* call to this method
|
||||
* @param value
|
||||
* @throws BitSetFullException - if the size specified at construction is
|
||||
* exceeded. Invoke full() to determine if the bitset is full either before
|
||||
* adding a new bit, or after adding a bit.
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||||
*/
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||||
public void add( boolean value ) throws BitSetFullException
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||||
{
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if( !isFull() )
|
||||
{
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this.set( mPointer++, value );
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||||
}
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||||
else
|
||||
{
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||||
throw new BitSetFullException( "bitset is full -- contains " +
|
||||
( mPointer + 1 ) + "bits");
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||||
}
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}
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||||
public String toString()
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||||
{
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StringBuilder sb = new StringBuilder();
|
||||
|
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for( int x = 0; x < mSize; x++ )
|
||||
{
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||||
sb.append( ( this.get( x ) ? "1" : "0" ) );
|
||||
}
|
||||
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return sb.toString();
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}
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/**
|
||||
* Returns this bitset as an array of integer ones and zeros
|
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*/
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||||
public int[] toIntegerArray()
|
||||
{
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int[] values = new int[ mSize ];
|
||||
|
||||
for (int i = nextSetBit( 0 ); i >= 0 && i < mSize; i = nextSetBit( i+1 ) )
|
||||
{
|
||||
values[ i ] = 1;
|
||||
}
|
||||
|
||||
return values;
|
||||
}
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|
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/**
|
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* Returns this message as a little endian byte array. Extra 0 bits will be padded to the end to make the overall
|
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* length a multiple of 8.
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* @return little endian message byte array
|
||||
*/
|
||||
public byte[] toByteArray()
|
||||
{
|
||||
int length = size() / 8;
|
||||
|
||||
if(length * 8 < size())
|
||||
{
|
||||
length ++;
|
||||
}
|
||||
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||||
byte[] bytes = new byte[length];
|
||||
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||||
int pointer = 0;
|
||||
|
||||
for(int x = 0; x < length; x++)
|
||||
{
|
||||
bytes[x] = getByte(pointer);
|
||||
pointer += 8;
|
||||
}
|
||||
|
||||
return bytes;
|
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}
|
||||
|
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/**
|
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* Returns this bitset as a reversed bit order array of integer ones and zeros
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* from the specified index range
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*/
|
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public int[] toReverseIntegerArray( int start, int end )
|
||||
{
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||||
int[] values = new int[ end - start + 1 ];
|
||||
|
||||
for (int i = nextSetBit( start ); i >= start && i <= end; i = nextSetBit( i+1 ) )
|
||||
{
|
||||
values[ end - i ] = 1;
|
||||
}
|
||||
|
||||
return values;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a boolean array from startIndex to end of the bitset
|
||||
*/
|
||||
public boolean[] getBits( int startIndex )
|
||||
{
|
||||
return getBits( startIndex, mSize - 1 );
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a boolean array of the right-most bitCount number of bits
|
||||
*/
|
||||
public boolean[] right( int bitCount )
|
||||
{
|
||||
return getBits( mSize - bitCount - 1 );
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a boolean array representing the bits located from startIndex
|
||||
* through endIndex
|
||||
*/
|
||||
public boolean[] getBits( int startIndex, int endIndex )
|
||||
{
|
||||
boolean[] returnValue = null;
|
||||
|
||||
if( startIndex >= 0 &&
|
||||
startIndex < endIndex &&
|
||||
endIndex < mSize )
|
||||
{
|
||||
returnValue = new boolean[ endIndex - startIndex + 1 ];
|
||||
|
||||
int bitsetPointer = startIndex;
|
||||
int returnPointer = 0;
|
||||
|
||||
while( bitsetPointer <= endIndex )
|
||||
{
|
||||
returnValue[ returnPointer ] = this.get( bitsetPointer );
|
||||
bitsetPointer++;
|
||||
returnPointer++;
|
||||
}
|
||||
}
|
||||
|
||||
return returnValue;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the integer value represented by the bit array
|
||||
* @param bits - an array of bit positions that will be treated as if they
|
||||
* were contiguous bits, with index 0 being the MSB and index
|
||||
* length - 1 being the LSB
|
||||
* @return - integer value of the bit array
|
||||
*/
|
||||
public int getInt( int[] bits )
|
||||
{
|
||||
if( bits.length > 32 )
|
||||
{
|
||||
throw new IllegalArgumentException( "Overflow - must be 32 bits "
|
||||
+ "or less to fit into a primitive integer value" );
|
||||
}
|
||||
|
||||
int value = 0;
|
||||
|
||||
for( int index: bits )
|
||||
{
|
||||
value = Integer.rotateLeft( value, 1 );
|
||||
|
||||
if( get( index ) )
|
||||
{
|
||||
value++;
|
||||
}
|
||||
}
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
public void setInt(int value, int[] indices)
|
||||
{
|
||||
for(int x = 0; x < indices.length; x++)
|
||||
{
|
||||
int mask = 1<<(indices.length - x - 1);
|
||||
|
||||
if((value & mask) == mask)
|
||||
{
|
||||
set(indices[x]);
|
||||
}
|
||||
else
|
||||
{
|
||||
clear(indices[x]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the byte value represented by the bit array
|
||||
* @param bits - an array of bit positions that will be treated as if they
|
||||
* were contiguous bits, with index 0 being the MSB and index
|
||||
* length - 1 being the LSB
|
||||
* @return - byte value of the bit array
|
||||
*/
|
||||
public byte getByte( int[] bits )
|
||||
{
|
||||
if( bits.length != 8 )
|
||||
{
|
||||
throw new IllegalArgumentException( "Invalid - there must be 8"
|
||||
+ "indexes to form a proper byte" );
|
||||
}
|
||||
|
||||
int value = 0;
|
||||
|
||||
for( int index: bits )
|
||||
{
|
||||
value = Integer.rotateLeft( value, 1 );
|
||||
|
||||
if( get( index ) )
|
||||
{
|
||||
value++;
|
||||
}
|
||||
}
|
||||
|
||||
return (byte)( value & 0xFF );
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the byte value contained between index and index + 7 bit positions
|
||||
* @param index specifying the start of the byte value
|
||||
* @return byte value contained at index <> index + 7 bit positions
|
||||
*/
|
||||
public byte getByte(int index)
|
||||
{
|
||||
Validate.isTrue((index + 7) <= size());
|
||||
|
||||
int value = 0;
|
||||
|
||||
for(int x = 0; x < 8; x++)
|
||||
{
|
||||
value = value << 1;
|
||||
|
||||
if(get(index + x))
|
||||
{
|
||||
value++;
|
||||
}
|
||||
}
|
||||
|
||||
return (byte)value;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the byte value at index position through index + 7 position.
|
||||
*
|
||||
* @param index bit position where to write the MSB of the byte value
|
||||
* @param value to write at the index through index + 7 bit positions
|
||||
*/
|
||||
public void setByte(int index, byte value)
|
||||
{
|
||||
Validate.isTrue((index + 8) <= size());
|
||||
|
||||
int mask = 0x80;
|
||||
|
||||
for(int x = 0; x < 8; x++)
|
||||
{
|
||||
if((mask & value) == mask)
|
||||
{
|
||||
set(index + x);
|
||||
}
|
||||
else
|
||||
{
|
||||
clear(index + x);
|
||||
}
|
||||
|
||||
mask = mask >> 1;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the long value represented by the bit array
|
||||
* @param bits - an array of bit positions that will be treated as if they
|
||||
* were contiguous bits, with index 0 being the MSB and index
|
||||
* length - 1 being the LSB
|
||||
* @return - integer value of the bit array
|
||||
*/
|
||||
public long getLong( int[] bits )
|
||||
{
|
||||
if( bits.length > 64 )
|
||||
{
|
||||
throw new IllegalArgumentException( "Overflow - must be 64 bits "
|
||||
+ "or less to fit into a primitive long value" );
|
||||
}
|
||||
|
||||
long value = 0;
|
||||
|
||||
for( int index: bits )
|
||||
{
|
||||
value = Long.rotateLeft( value, 1 );
|
||||
|
||||
if( get( index ) )
|
||||
{
|
||||
value++;
|
||||
}
|
||||
}
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* Converts up to 63 bits from the bit array into an integer and then
|
||||
* formats the value into hexadecimal, prefixing the value with zeros to
|
||||
* provide a total length of digitDisplayCount;
|
||||
*
|
||||
* @param bits
|
||||
* @param digitDisplayCount
|
||||
* @return
|
||||
*/
|
||||
public String getHex( int[] bits, int digitDisplayCount )
|
||||
{
|
||||
if( bits.length <= 32 )
|
||||
{
|
||||
int value = getInt( bits );
|
||||
|
||||
return String.format( "%0" + digitDisplayCount + "X", value );
|
||||
}
|
||||
else if( bits.length <= 64 )
|
||||
{
|
||||
long value = getLong( bits );
|
||||
|
||||
return String.format( "%0" + digitDisplayCount + "X", value );
|
||||
}
|
||||
else
|
||||
{
|
||||
throw new IllegalArgumentException( "BitSetBuffer.getHex() "
|
||||
+ "maximum array length is 63 bits" );
|
||||
}
|
||||
}
|
||||
|
||||
public String getHex( int msb, int lsb, int digitDisplayCount )
|
||||
{
|
||||
int length = lsb - msb;
|
||||
|
||||
if( length <= 32 )
|
||||
{
|
||||
int value = getInt( msb, lsb );
|
||||
|
||||
return String.format( "%0" + digitDisplayCount + "X", value );
|
||||
}
|
||||
else if( length <= 64 )
|
||||
{
|
||||
long value = getLong( msb, lsb );
|
||||
|
||||
return String.format( "%0" + digitDisplayCount + "X", value );
|
||||
}
|
||||
else
|
||||
{
|
||||
throw new IllegalArgumentException( "BitSetBuffer.getHex() "
|
||||
+ "maximum array length is 64 bits" );
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the int value represented by the bit range. This method will
|
||||
* parse the bits in big endian or little endian format. The start value
|
||||
* represents the MSB and the end value represents the LSB of the value.
|
||||
*
|
||||
* start < end: little endian interpretation
|
||||
* end < start: big endian interpretation
|
||||
*
|
||||
* @param start - MSB of the value
|
||||
* @param end - LSB of the value
|
||||
*
|
||||
* @return - int value of the bit range
|
||||
*/
|
||||
public int getInt( int start, int end )
|
||||
{
|
||||
if( Math.abs( end - start ) > 32 )
|
||||
{
|
||||
throw new IllegalArgumentException( "Overflow - must be 32 bits "
|
||||
+ "or less to fit into a primitive integer value" );
|
||||
}
|
||||
|
||||
int value = 0;
|
||||
|
||||
if( start < end )
|
||||
{
|
||||
for( int x = start; x <= end; x++ )
|
||||
{
|
||||
value = Integer.rotateLeft( value, 1 );
|
||||
|
||||
if( get( x ) )
|
||||
{
|
||||
value++;;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
for( int x = end; x >= start; x-- )
|
||||
{
|
||||
value = Integer.rotateLeft( value, 1 );
|
||||
|
||||
if( get( x ) )
|
||||
{
|
||||
value++;;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the long value represented by the bit range. This method will
|
||||
* parse the bits in big endian or little endian format. The start value
|
||||
* represents the MSB and the end value represents the LSB of the value.
|
||||
*
|
||||
* start < end: little endian interpretation
|
||||
* end < start: big endian interpretation
|
||||
*
|
||||
* @param start - MSB of the value
|
||||
* @param end - LSB of the value
|
||||
*
|
||||
* @return - long value of the bit range
|
||||
*/
|
||||
public long getLong( int start, int end )
|
||||
{
|
||||
if( Math.abs( end - start ) > 64 )
|
||||
{
|
||||
throw new IllegalArgumentException( "Overflow - must be 64 bits "
|
||||
+ "or less to fit into a primitive long value" );
|
||||
}
|
||||
|
||||
long value = 0;
|
||||
|
||||
if( start < end )
|
||||
{
|
||||
for( int x = start; x <= end; x++ )
|
||||
{
|
||||
value = Long.rotateLeft( value, 1 );
|
||||
|
||||
if( get( x ) )
|
||||
{
|
||||
value++;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
for( int x = end; x >= start; x-- )
|
||||
{
|
||||
value = Long.rotateLeft( value, 1 );
|
||||
|
||||
if( get( x ) )
|
||||
{
|
||||
value++;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a buffer of size=width and fills the buffer with the fill value
|
||||
* @param width - size of the buffer
|
||||
* @param fill - initial fill value
|
||||
* @return - filled buffer
|
||||
*/
|
||||
public static BinaryMessage getBuffer( int width, long fill )
|
||||
{
|
||||
BinaryMessage buffer = new BinaryMessage( width );
|
||||
|
||||
buffer.load( 0, width, fill );
|
||||
|
||||
return buffer;
|
||||
}
|
||||
|
||||
/**
|
||||
* Loads the value into the buffer starting at the offset index, and
|
||||
* assuming that the value represents (width) number of bits. The MSB of
|
||||
* the value will be located at the offset and the LSB of the value will
|
||||
* be located at ( offset + width ).
|
||||
*
|
||||
* @param offset - starting bit index for the MSB of the value
|
||||
* @param width - representative bit width of the value
|
||||
* @param value - value to be loaded into the buffer
|
||||
*/
|
||||
public void load( int offset, int width, long value )
|
||||
{
|
||||
for( int x = 0; x < width; x++ )
|
||||
{
|
||||
long mask = Long.rotateLeft( 1, width - x - 1 );
|
||||
|
||||
if( ( mask & value ) == mask )
|
||||
{
|
||||
set( offset + x );
|
||||
}
|
||||
else
|
||||
{
|
||||
clear( offset + x );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Generates an array of message bit position indexes to support accessing
|
||||
* a contiguous field value
|
||||
*
|
||||
* @param start - starting bit position of the field
|
||||
* @param length - field length
|
||||
* @return - array of field indexes
|
||||
*/
|
||||
public static int[] getFieldIndexes( int start, int length, boolean bigEndian )
|
||||
{
|
||||
int[] checksumIndexes = new int[ length ];
|
||||
|
||||
for( int x = 0; x < length; x++ )
|
||||
{
|
||||
if( bigEndian )
|
||||
{
|
||||
checksumIndexes[ length - x - 1 ] = start + x;
|
||||
}
|
||||
else
|
||||
{
|
||||
checksumIndexes[ x ] = start + x;
|
||||
}
|
||||
}
|
||||
|
||||
return checksumIndexes;
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a bitsetbuffer loaded from a string of zeros and ones
|
||||
*
|
||||
* @param message - string containing only zeros and ones
|
||||
* @return - loaded buffer
|
||||
*/
|
||||
public static BinaryMessage load( String message )
|
||||
{
|
||||
if( !message.matches( "[01]*" ) )
|
||||
{
|
||||
throw new IllegalArgumentException(
|
||||
"Message must contain only zeros and ones" );
|
||||
}
|
||||
|
||||
BinaryMessage buffer = new BinaryMessage( message.length() );
|
||||
|
||||
for( int x = 0; x < message.length(); x++ )
|
||||
{
|
||||
if( message.substring( x, x + 1 ).contentEquals( "1" ) )
|
||||
{
|
||||
buffer.set( x );
|
||||
}
|
||||
}
|
||||
|
||||
return buffer;
|
||||
}
|
||||
|
||||
/**
|
||||
* Left rotates the bits between start and end indices, number of places.
|
||||
*/
|
||||
public void rotateLeft( int places, int startIndex, int endIndex )
|
||||
{
|
||||
for( int x = 0; x < places; x++ )
|
||||
{
|
||||
rotateLeft( startIndex, endIndex );
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Left rotates the bits between start and end and wraps the left-most
|
||||
* bit around to the end.
|
||||
*/
|
||||
public void rotateLeft( int startIndex, int endIndex )
|
||||
{
|
||||
boolean wrapBit = get( startIndex );
|
||||
|
||||
for( int x = startIndex; x < endIndex; x++ )
|
||||
{
|
||||
if( get( x + 1 ) )
|
||||
{
|
||||
set( x );
|
||||
}
|
||||
else
|
||||
{
|
||||
clear( x );
|
||||
}
|
||||
}
|
||||
|
||||
if( wrapBit )
|
||||
{
|
||||
set( endIndex );
|
||||
}
|
||||
else
|
||||
{
|
||||
clear( endIndex );
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Right rotates the bits between start and end indices, number of places.
|
||||
*/
|
||||
public void rotateRight( int places, int startIndex, int endIndex )
|
||||
{
|
||||
for( int x = 0; x < places; x++ )
|
||||
{
|
||||
rotateRight( startIndex, endIndex );
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Right rotates the bits between start and end and wraps the right-most
|
||||
* bit around to the start.
|
||||
*/
|
||||
public void rotateRight( int startIndex, int endIndex )
|
||||
{
|
||||
boolean wrapBit = get( endIndex );
|
||||
|
||||
for( int x = endIndex - 1; x >= startIndex; x-- )
|
||||
{
|
||||
if( get( x ) )
|
||||
{
|
||||
set( x + 1 );
|
||||
}
|
||||
else
|
||||
{
|
||||
clear( x + 1 );
|
||||
}
|
||||
}
|
||||
|
||||
if( wrapBit )
|
||||
{
|
||||
set( startIndex );
|
||||
}
|
||||
else
|
||||
{
|
||||
clear( startIndex );
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Performs exclusive or of the value against this bitset starting at the
|
||||
* offset position using width bits from the value.
|
||||
*/
|
||||
public void xor( int offset, int width, int value )
|
||||
{
|
||||
BinaryMessage mask = new BinaryMessage( this.size() );
|
||||
|
||||
mask.load( offset, width, value );
|
||||
|
||||
this.xor( mask );
|
||||
}
|
||||
|
||||
public static void main(String[] args)
|
||||
{
|
||||
BinaryMessage b = new BinaryMessage(32);
|
||||
|
||||
int[] indices = {2,3,7,8};
|
||||
|
||||
b.setInt(0xF, indices);
|
||||
|
||||
System.out.println(b.toString());
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user