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add crc16

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Looly
2020-07-18 10:53:11 +08:00
parent 9157fa332b
commit b58f98eb95
13 changed files with 438 additions and 48 deletions
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69
hutool-core/src/main/java/cn/hutool/core/io/checksum/CRC16.java
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package cn.hutool.core.io.checksum;
import java.io.Serializable;
import java.util.zip.Checksum;
import cn.hutool.core.io.checksum.crc16.CRC16Checksum;
import cn.hutool.core.io.checksum.crc16.CRC16IBM;
/**
* CRC16 循环冗余校验码（Cyclic Redundancy Check）实现<br>
* 代码来自：https://github.com/BBSc0der
*
* CRC16 循环冗余校验码（Cyclic Redundancy Check）实现，默认IBM算法
*
* @author looly
* @since 4.4.1
*/
public class CRC16 implements Checksum, Serializable {
public class CRC16 extends CRC16Checksum {
private static final long serialVersionUID = 1L;
// CRC16 = bb3d
// Uses irreducible polynomial: 1 + x^2 + x^15 + x^16
private final CRC16Checksum crc16;
private static final int[] TABLE = { //
0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241, //
0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440, //
0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40, //
0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841, //
0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40, //
0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41, //
0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641, //
0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040, //
0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240, //
0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441, //
0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41, //
0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840, //
0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41, //
0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40, //
0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640, //
0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041, //
0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240, //
0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441, //
0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41, //
0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840, //
0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41, //
0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40, //
0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640, //
0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041, //
0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241, //
0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440, //
0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40, //
0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841, //
0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40, //
0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41, //
0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641, //
0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040//
};
CRC16(){
this(new CRC16IBM());
}
private int sum = 0x0000;
/**
* 构造
*
* @param crc16Checksum {@link CRC16Checksum} 实现
*/
CRC16(CRC16Checksum crc16Checksum){
this.crc16 = crc16Checksum;
}
@Override
public long getValue() {
return sum;
return crc16.getValue();
}
@Override
public void reset() {
sum = 0x0000;
crc16.reset();
}
@Override
public void update(byte[] b, int off, int len) {
for (int i = off; i < off + len; i++)
update(b[i]);
crc16.update(b, off, len);
}
@Override
public void update(int b) {
sum = (sum >> 8) ^ TABLE[((sum) ^ (b & 0xff)) & 0xff];
crc16.update(b);
}
}

26
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16CCITT.java Normal file
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package cn.hutool.core.io.checksum.crc16;
/**
* CRC16_CCITT：多项式x16+x12+x5+1（0x1021），初始值0x0000，低位在前，高位在后，结果与0x0000异或
* 0x8408是0x1021按位颠倒后的结果。
*
* @author looly
* @since 5.3.10
*/
public class CRC16CCITT extends CRC16Checksum{
private static final int wCPoly = 0x8408;
@Override
public void update(int b) {
wCRCin ^= (b & 0x00ff);
for (int j = 0; j < 8; j++) {
if ((wCRCin & 0x0001) != 0) {
wCRCin >>= 1;
wCRCin ^= wCPoly;
} else {
wCRCin >>= 1;
}
}
}
}

33
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16CCITTFalse.java Normal file
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package cn.hutool.core.io.checksum.crc16;
/**
* CRC16_CCITT_FALSE：多项式x16+x12+x5+1（0x1021），初始值0xFFFF，低位在后，高位在前，结果与0x0000异或
*
* @author looly
* @since 5.3.10
*/
public class CRC16CCITTFalse extends CRC16Checksum{
private static final int wCPoly = 0x1021;
public CRC16CCITTFalse(){
this.wCRCin = 0xffff;
}
@Override
public void update(byte[] b, int off, int len) {
super.update(b, off, len);
wCRCin &= 0xffff;
}
@Override
public void update(int b) {
for (int i = 0; i < 8; i++) {
boolean bit = ((b >> (7 - i) & 1) == 1);
boolean c15 = ((wCRCin >> 15 & 1) == 1);
wCRCin <<= 1;
if (c15 ^ bit)
wCRCin ^= wCPoly;
}
}
}

45
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Checksum.java Normal file
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package cn.hutool.core.io.checksum.crc16;
import java.io.Serializable;
import java.util.zip.Checksum;
/**
* CRC16 Checksum，用于提供多种CRC16算法的通用实现<br>
* 通过继承此类，重写update和reset完成相应算法。
*
* @author looly
* @since 5.3.10
*/
public abstract class CRC16Checksum implements Checksum, Serializable {
private static final long serialVersionUID = 1L;
/**
* CRC16 Checksum 结果值
*/
protected int wCRCin = 0x0000;
@Override
public long getValue() {
return wCRCin;
}
@Override
public void reset() {
wCRCin = 0x0000;
}
/**
* 计算全部字节
* @param b 字节
*/
public void update(byte[] b){
update(b, 0, b.length);
}
@Override
public void update(byte[] b, int off, int len) {
for (int i = off; i < off + len; i++)
update(b[i]);
}
}

32
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16DNP.java Normal file
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package cn.hutool.core.io.checksum.crc16;
/**
* CRC16_DNP：多项式x16+x13+x12+x11+x10+x8+x6+x5+x2+1（0x3D65），初始值0x0000，低位在前，高位在后，结果与0xFFFF异或
* 0xA6BC是0x3D65按位颠倒后的结果
*
* @author looly
* @since 5.3.10
*/
public class CRC16DNP extends CRC16Checksum{
private static final int wCPoly = 0xA6BC;
@Override
public void update(byte[] b, int off, int len) {
super.update(b, off, len);
wCRCin ^= 0xffff;
}
@Override
public void update(int b) {
wCRCin ^= (b & 0x00ff);
for (int j = 0; j < 8; j++) {
if ((wCRCin & 0x0001) != 0) {
wCRCin >>= 1;
wCRCin ^= wCPoly;
} else {
wCRCin >>= 1;
}
}
}
}

26
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16IBM.java Normal file
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package cn.hutool.core.io.checksum.crc16;
/**
* CRC16_IBM：多项式x16+x15+x2+1（0x8005），初始值0x0000，低位在前，高位在后，结果与0x0000异或
* 0xA001是0x8005按位颠倒后的结果
*
* @author looly
* @since 5.3.10
*/
public class CRC16IBM extends CRC16Checksum{
private static final int wCPoly = 0xa001;
@Override
public void update(int b) {
wCRCin ^= (b & 0x00ff);
for (int j = 0; j < 8; j++) {
if ((wCRCin & 0x0001) != 0) {
wCRCin >>= 1;
wCRCin ^= wCPoly;
} else {
wCRCin >>= 1;
}
}
}
}

32
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Maxim.java Normal file
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package cn.hutool.core.io.checksum.crc16;
/**
* CRC16_MAXIM：多项式x16+x15+x2+1（0x8005），初始值0x0000，低位在前，高位在后，结果与0xFFFF异或
* 0xA001是0x8005按位颠倒后的结果
*
* @author looly
* @since 5.3.10
*/
public class CRC16Maxim extends CRC16Checksum{
private static final int wCPoly = 0xa001;
@Override
public void update(byte[] b, int off, int len) {
super.update(b, off, len);
wCRCin ^= 0xffff;
}
@Override
public void update(int b) {
wCRCin ^= (b & 0x00ff);
for (int j = 0; j < 8; j++) {
if ((wCRCin & 0x0001) != 0) {
wCRCin >>= 1;
wCRCin ^= wCPoly;
} else {
wCRCin >>= 1;
}
}
}
}

31
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Modbus.java Normal file
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package cn.hutool.core.io.checksum.crc16;
/**
* CRC-16 (Modbus)
* CRC16_MODBUS：多项式x16+x15+x2+1（0x8005），初始值0xFFFF，低位在前，高位在后，结果与0x0000异或
* 0xA001是0x8005按位颠倒后的结果
*
* @author looly
* @since 5.3.10
*/
public class CRC16Modbus extends CRC16Checksum{
private static final int wCPoly = 0xa001;
public CRC16Modbus(){
this.wCRCin = 0xffff;
}
@Override
public void update(int b) {
wCRCin ^= ((int) b & 0x00ff);
for (int j = 0; j < 8; j++) {
if ((wCRCin & 0x0001) != 0) {
wCRCin >>= 1;
wCRCin ^= wCPoly;
} else {
wCRCin >>= 1;
}
}
}
}

36
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16USB.java Normal file
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package cn.hutool.core.io.checksum.crc16;
/**
* CRC16_USB：多项式x16+x15+x2+1（0x8005），初始值0xFFFF，低位在前，高位在后，结果与0xFFFF异或
* 0xA001是0x8005按位颠倒后的结果
*
* @author looly
* @since 5.3.10
*/
public class CRC16USB extends CRC16Checksum{
private static final int wCPoly = 0xa001;
public CRC16USB(){
this.wCRCin = 0xFFFF;
}
@Override
public void update(byte[] b, int off, int len) {
super.update(b, off, len);
wCRCin ^= 0xffff;
}
@Override
public void update(int b) {
wCRCin ^= (b & 0x00ff);
for (int j = 0; j < 8; j++) {
if ((wCRCin & 0x0001) != 0) {
wCRCin >>= 1;
wCRCin ^= wCPoly;
} else {
wCRCin >>= 1;
}
}
}
}

36
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16X25.java Normal file
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package cn.hutool.core.io.checksum.crc16;
/**
* CRC16_X25：多项式x16+x12+x5+1（0x1021），初始值0xffff，低位在前，高位在后，结果与0xFFFF异或
* 0x8408是0x1021按位颠倒后的结果。
*
* @author looly
* @since 5.3.10
*/
public class CRC16X25 extends CRC16Checksum{
private static final int wCPoly = 0x8408;
public CRC16X25(){
this.wCRCin = 0xffff;
}
@Override
public void update(byte[] b, int off, int len) {
super.update(b, off, len);
wCRCin ^= 0xffff;
}
@Override
public void update(int b) {
wCRCin ^= (b & 0x00ff);
for (int j = 0; j < 8; j++) {
if ((wCRCin & 0x0001) != 0) {
wCRCin >>= 1;
wCRCin ^= wCPoly;
} else {
wCRCin >>= 1;
}
}
}
}

31
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16XModem.java Normal file
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package cn.hutool.core.io.checksum.crc16;
/**
* CRC-CCITT (XModem)
* CRC16_XMODEM：多项式x16+x12+x5+1（0x1021），初始值0x0000，低位在后，高位在前，结果与0x0000异或
*
* @author looly
* @since 5.3.10
*/
public class CRC16XModem extends CRC16Checksum{
// 0001 0000 0010 0001 (0, 5, 12)
private static final int wCPoly = 0x1021;
@Override
public void update(byte[] b, int off, int len) {
super.update(b, off, len);
wCRCin &= 0xffff;
}
@Override
public void update(int b) {
for (int i = 0; i < 8; i++) {
boolean bit = ((b >> (7 - i) & 1) == 1);
boolean c15 = ((wCRCin >> 15 & 1) == 1);
wCRCin <<= 1;
if (c15 ^ bit)
wCRCin ^= wCPoly;
}
}
}

7
hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/package-info.java Normal file
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/**
* CRC16相关算法封装为Checksum
*
* @author looly
*
*/
package cn.hutool.core.io.checksum.crc16;

82
hutool-core/src/test/java/cn/hutool/core/io/checksum/CRC16Test.java Normal file
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package cn.hutool.core.io.checksum;
import cn.hutool.core.io.checksum.crc16.CRC16CCITT;
import cn.hutool.core.io.checksum.crc16.CRC16CCITTFalse;
import cn.hutool.core.io.checksum.crc16.CRC16DNP;
import cn.hutool.core.io.checksum.crc16.CRC16IBM;
import cn.hutool.core.io.checksum.crc16.CRC16Maxim;
import cn.hutool.core.io.checksum.crc16.CRC16Modbus;
import cn.hutool.core.io.checksum.crc16.CRC16USB;
import cn.hutool.core.io.checksum.crc16.CRC16X25;
import cn.hutool.core.io.checksum.crc16.CRC16XModem;
import cn.hutool.core.util.HexUtil;
import org.junit.Assert;
import org.junit.Test;
public class CRC16Test {
private final String data = "QN=20160801085857223;ST=23;CN=2011;PW=123456;MN=010000A8900016F000169DC0;Flag=5;CP=&&DataTime=20160801085857; LA-Rtd=50.1&&";
@Test
public void ccittTest(){
final CRC16CCITT crc16 = new CRC16CCITT();
crc16.update(data.getBytes());
Assert.assertEquals("c852", HexUtil.toHex(crc16.getValue()));
}
@Test
public void ccittFalseTest(){
final CRC16CCITTFalse crc16 = new CRC16CCITTFalse();
crc16.update(data.getBytes());
Assert.assertEquals("a5e4", HexUtil.toHex(crc16.getValue()));
}
@Test
public void xmodemTest(){
final CRC16XModem crc16 = new CRC16XModem();
crc16.update(data.getBytes());
Assert.assertEquals("5a8d", HexUtil.toHex(crc16.getValue()));
}
@Test
public void x25Test(){
final CRC16X25 crc16 = new CRC16X25();
crc16.update(data.getBytes());
Assert.assertEquals("a152", HexUtil.toHex(crc16.getValue()));
}
@Test
public void modbusTest(){
final CRC16Modbus crc16 = new CRC16Modbus();
crc16.update(data.getBytes());
Assert.assertEquals("25fb", HexUtil.toHex(crc16.getValue()));
}
@Test
public void ibmTest(){
final CRC16IBM crc16 = new CRC16IBM();
crc16.update(data.getBytes());
Assert.assertEquals("18c", HexUtil.toHex(crc16.getValue()));
}
@Test
public void maximTest(){
final CRC16Maxim crc16 = new CRC16Maxim();
crc16.update(data.getBytes());
Assert.assertEquals("fe73", HexUtil.toHex(crc16.getValue()));
}
@Test
public void usbTest(){
final CRC16USB crc16 = new CRC16USB();
crc16.update(data.getBytes());
Assert.assertEquals("da04", HexUtil.toHex(crc16.getValue()));
}
@Test
public void dnpTest(){
final CRC16DNP crc16 = new CRC16DNP();
crc16.update(data.getBytes());
Assert.assertEquals("3d1a", HexUtil.toHex(crc16.getValue()));
}
}