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Merge pull request #1337 from tsparber/pr-ccittcrc-crlf

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CCITT_CRC.java Change line endings from CRLF to LF
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Nicolas Tsiftes 2015-11-02 14:00:51 +01:00
parent 2e07e1fc48 d817540f19
commit 139f427458
1 changed files with 88 additions and 89 deletions
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177
tools/cooja/java/org/contikios/cooja/util/CCITT_CRC.java
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@ -1,89 +1,88 @@
/**
* Copyright (c) 2008, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of MSPSim.
*
* -----------------------------------------------------------------
*
* Author : Joakim Eriksson
*/
package org.contikios.cooja.util;
/* basic CRC-CCITT code */
public class CCITT_CRC {
int crc;
public int getCRC() {
return crc;
}
/* this will only work with zero... */
public void setCRC(int val) {
crc = val;
}
public void clr() {
crc = 0xffff;
}
public void addBitrev(int data) {
add(bitrev(data));
}
public int getCRCLow() {
return bitrev(crc & 0xff);
}
public int getCRCHi() {
return bitrev(crc >> 8);
}
public int add(int data) {
int newCrc = ((crc >> 8) & 0xff) | (crc << 8) & 0xffff;
newCrc ^= (data & 0xff);
newCrc ^= (newCrc & 0xff) >> 4;
newCrc ^= (newCrc << 12) & 0xffff;
newCrc ^= (newCrc & 0xff) << 5;
crc = newCrc & 0xffff;
return crc;
}
public int getCRCBitrev() {
return getCRCLow() + (getCRCHi() << 8);
}
public static final String hex = "0123456789abcdef";
private static int bitrev(int data) {
return ((data << 7) & 0x80) | ((data << 5) & 0x40) |
(data << 3) & 0x20 | (data << 1) & 0x10 |
(data >> 7) & 0x01 | (data >> 5) & 0x02 |
(data >> 3) & 0x04 | (data >> 1) & 0x08;
}
}
/**
* Copyright (c) 2008, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of MSPSim.
*
* -----------------------------------------------------------------
*
* Author : Joakim Eriksson
*/
package org.contikios.cooja.util;
/* basic CRC-CCITT code */
public class CCITT_CRC {
int crc;
public int getCRC() {
return crc;
}
/* this will only work with zero... */
public void setCRC(int val) {
crc = val;
}
public void clr() {
crc = 0xffff;
}
public void addBitrev(int data) {
add(bitrev(data));
}
public int getCRCLow() {
return bitrev(crc & 0xff);
}
public int getCRCHi() {
return bitrev(crc >> 8);
}
public int add(int data) {
int newCrc = ((crc >> 8) & 0xff) | (crc << 8) & 0xffff;
newCrc ^= (data & 0xff);
newCrc ^= (newCrc & 0xff) >> 4;
newCrc ^= (newCrc << 12) & 0xffff;
newCrc ^= (newCrc & 0xff) << 5;
crc = newCrc & 0xffff;
return crc;
}
public int getCRCBitrev() {
return getCRCLow() + (getCRCHi() << 8);
}
public static final String hex = "0123456789abcdef";
private static int bitrev(int data) {
return ((data << 7) & 0x80) | ((data << 5) & 0x40) |
(data << 3) & 0x20 | (data << 1) & 0x10 |
(data >> 7) & 0x01 | (data >> 5) & 0x02 |
(data >> 3) & 0x04 | (data >> 1) & 0x08;
}
}