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https://github.com/DSheirer/sdrtrunk.git
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9316599dec
ant to gradle. Removes linux and windows application launch scripts and produces an executable jar with all resources included.
53 lines
1.6 KiB
Java
53 lines
1.6 KiB
Java
/*******************************************************************************
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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.edac;
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import java.util.BitSet;
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/**
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* Calculates a 7-bit checksum using an array of xor values from the
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* ChecksumType class
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*/
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public class Checksum
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{
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public static boolean validate7BitChecksum( BitSet message,
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byte messageChecksum,
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ChecksumType checksumType )
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{
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return ( messageChecksum & get7BitChecksum( message, checksumType ) ) == 0;
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}
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public static byte get7BitChecksum( BitSet message,
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ChecksumType checksumType )
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{
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byte checksum = 0x00;
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short[] checkValues = checksumType.getValues();
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for( int x = 0; x < checkValues.length; x++ )
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{
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if( message.get( x ) )
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{
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checksum ^= checkValues[ x ];
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}
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}
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return checksum;
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}
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}
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