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Generic Java language CRC implementation (includes CRC16, CRC32, CRC64, etc). With more than 170 predefined CRC like: CRC-32/ISO-HDLC, CRC-64/ECMA-182,...
The newest version!
/*
* Copyright (c) 2017-20xx Andrey D. Shindarev ([email protected])
* This program is made available under the terms of the BSD 3-Clause License.
*/
package com.github.sftwnd.crayfish.common.crc;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import lombok.EqualsAndHashCode;
import lombok.Generated;
import lombok.Getter;
import lombok.SneakyThrows;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Predicate;
import java.util.stream.Stream;
/**
* Registered predefined CrcModel for CrcDescription
*/
@SuppressWarnings({"java:S100", "java:S107"})
@EqualsAndHashCode(callSuper = true)
public class CrcModel extends CrcDescription {
public static final String CHECK_BUFF = "123456789";
@Getter public final String name;
@Getter public final Long check;
@Getter private final CrcDescription crcDescription;
private CrcModel(@Nullable final String name, final int width, final long poly, final long init, final boolean refin, final boolean refot, final long xorot, @Nullable final Long check) {
this(name, new CrcDescription(width, poly, init, refin, refot, xorot), check);
}
private CrcModel(@Nullable final String name, @NonNull final CrcDescription model, @Nullable final Long check) {
super(_config(Objects.requireNonNull(model, "CRC_model_t::new - model is null")));
this.name = name == null ? super.toString() : name;
this.crcDescription = model;
this.check = Optional.ofNullable(check).orElseGet(() -> new CrcModel(null, model, -1L).getCRC().update(CHECK_BUFF.getBytes()).getCrc());
}
@Override
public long getPoly() {
return crcDescription.getPoly();
}
@Override
public long getInit() {
return crcDescription.getInit();
}
@Override
public boolean isRefot() {
return crcDescription.isRefot();
}
@Override
public @NonNull CRC getCRC() {
CRC result = new CRC(this);
_init();
return result;
}
/**
* Create CRC and update by the value of buff
* @param buff buffer
* @param offset buffer offset
* @param len used buffer size
* @return created CRC
*/
public @NonNull CRC getCRC(byte[] buff, int offset, int len) {
return getCRC().update(buff, offset, len);
}
/**
* Create CRC and update by the value of buff
* @param buff buffer
* @param len used buffer size
* @return created CRC
*/
public @NonNull CRC getCRC(byte[] buff, int len) {
return getCRC(buff, 0, len);
}
/**
* Create CRC and update by the value of buff
* @param buff buffer
* @return created CRC
*/
public @NonNull CRC getCRC(byte[] buff) {
return getCRC(buff, 0, buff == null ? 0 : buff.length);
}
/**
* Create CRC and update by the value of buff
* @param crc initial crc value
* @param len initial processed length
* @return created CRC
*/
@Override
public @NonNull CRC getCRC(long crc, int len) {
CRC result = new CRC(this, crc, len);
_init();
return result;
}
@Override
public String toString() {
return name;
}
// This DCL is correct because variable is volatile and initialization makes before
protected void _init() {
if (this.table_byte == null) {
synchronized (this.crcDescription) {
if (this.crcDescription.table_byte == null) {
this.crcDescription.table_byte = _createBytewiseTable();
}
this.table_byte = this.crcDescription.table_byte;
}
}
}
/**
* Process the model data for th calculation.
* constants will be equals of original values, but variables - changed
*/
@SuppressWarnings("java:S3358")
private static CrcDescription _config(@NonNull final CrcDescription model) {
return new CrcDescription(
model.width,
model.refin ? CrcModel.reflect(model.poly, model.width) : model.poly,
(model.refot ? CrcModel.reflect(model.init, model.width) : model.init) ^ model.xorot,
model.refin,
model.refot ^ model.refin,
model.xorot
);
}
private long[] _createBytewiseTable() {
long[] table = new long[256];
long crc;
for (int k = 0; k < table.length; k++) {
crc = createBitwiseValue(k);
if (refot) {
crc = reflect(crc);
}
if (width < 8 && !refin) {
crc <<= 8 - width;
}
table[k] = crc;
}
return table;
}
@SuppressWarnings({"java:S3776", "java:S125"})
private long createBitwiseValue(int k) {
/* if requested, return the initial CRC: if (k < 0) return init; */
long poly = this.poly;
/* pre-process the CRC */
long crc = xorot;
if (refot) {
crc = reflect(crc);
}
/* process the input data a bit at a time */
if (refin) {
crc &= widmask(width);
crc ^= k;
for (int i = 0; i < 8; i++) {
crc = ((crc & 1) != 0) ? (crc >>> 1) ^ poly : crc >>> 1;
}
} else if (width <= 8) {
int shift = 8 - width; /* 0..7 */
poly <<= shift;
crc <<= shift;
crc ^= k;
for (int i = 0; i < 8; i++) {
crc = (crc & 0x80) != 0 ? (crc << 1) ^ poly : crc << 1;
}
crc >>= shift;
crc &= widmask(width);
} else {
long mask = 1L << (width - 1);
int shift = width - 8; /* 1..WORDBITS-8 */
crc ^= ((long) k) << shift;
for (int i = 0; i < 8; i++) {
crc = ((crc & mask) != 0) ? (crc << 1) ^ poly : crc << 1;
}
crc &= widmask(width);
}
/* post-process and return the CRC */
if (refot) {
crc = reflect(crc);
}
return crc ^ xorot;
}
protected long crcBytewise(long crc, byte[] buf, int offset, int len) {
/* if requested, return the initial CRC */
if (buf == null)
return init;
/* pre-process the CRC */
if (refot) {
crc = reflect(crc);
}
/* process the input data a byte at a time */
if (refin) {
crc &= widmask(width);
while (len-- > 0) {
crc = (crc >>> 8) ^ table_byte[(int) ((crc ^ buf[offset++]) & 0xff)];
}
} else if (width <= 8) {
int shift = 8 - width; /* 0..7 */
crc <<= shift;
while (len-- > 0) {
crc = table_byte[(int) (crc ^ buf[offset++])];
}
crc >>>= shift;
} else {
int shift = width - 8; /* 1..WORDBITS-8 */
while (len-- > 0) {
crc = (crc << 8) ^
table_byte[(int) (((crc >>> shift) ^ (buf[offset++] & 0xff)) & 0xff)];
}
crc &= widmask(width);
}
/* post-process and return the CRC */
if (refot) {
crc = reflect(crc);
}
return crc;
}
private static final List models = new ArrayList<>();
/**
* Stream of all registered models
* @return stream of models
*/
public static @NonNull Stream getModels() {
return getModels(null);
}
@Generated
@SneakyThrows
private static CrcModel castModel(Field field) {
if (field != null && field.getType().equals(CrcModel.class)) {
try {
return (CrcModel) field.get(0);
} catch (IllegalAccessException iaex) {
return null;
}
}
return null;
}
/**
* Stream of all registered models
* @param filter filter predicate for models
* @return stream of models
*/
public static @NonNull Stream getModels(@Nullable final Predicate filter) {
synchronized (models) {
return Stream.concat(
Arrays.stream(CrcModel.class.getDeclaredFields())
.map(CrcModel::castModel)
.filter(Objects::nonNull)
.map(CrcModel.class::cast)
, models.stream()
).filter(filter == null ? m -> true : filter);
}
}
/**
* Look up Crc Model by the name
* @param name Name of model
* @return CrcModel for the name or null
*/
public static @Nullable
CrcModel lookUp(@Nullable final String name) {
return name == null ? null
: getModels(m -> name.equals(m.getName())).findFirst().orElse(null);
}
@Generated
private static @NonNull String modelNameFirst(@NonNull final CrcModel model, @Nullable final String name) {
return (model.getName().equals(name) ? "a" : "b") + model.getName();
}
/**
* Creation and registration of CrcModel
* @param name Name of model
* @param crcDescription CrcDescription
* @param value Check value
* @return registered model
*/
public static @NonNull CrcModel construct(@Nullable final String name, @NonNull final CrcDescription crcDescription, @Nullable final Long value) {
return getModels(m -> Optional.of(Objects.requireNonNull(crcDescription, "CrcModel::construct - crcDescription is null"))
.filter(CrcModel.class::isInstance).map(CrcModel.class::cast)
.map(CrcModel::getCrcDescription)
.orElse(crcDescription)
.equals(m.getCrcDescription()))
.min(Comparator.comparing(mdl -> modelNameFirst(mdl, name)))
.map(model -> (name == null || model.getName().equals(name)) ? model : registerModel(name, model.getCrcDescription(), model.getCheck()))
.orElseGet(() -> registerModel(name, crcDescription, value));
}
private static CrcModel registerModel(@Nullable String name, @NonNull CrcDescription crcDescription, @Nullable Long checkValue) {
CrcModel crcModel = new CrcModel(name, crcDescription, checkValue);
synchronized (models) {
models.add(crcModel);
}
return crcModel;
}
/**
* Creation and registration of CrcModel
* @param crcDescription CrcDescription
* @param value Check value
* @return registered model
*/
public static @NonNull CrcModel construct(@NonNull final CrcDescription crcDescription, @Nullable final Long value) {
return construct(null, crcDescription, value);
}
/**
* Creation and registration of CrcModel
* @param crcDescription CrcDescription
* @return registered model
*/
public static @NonNull CrcModel construct(@NonNull final CrcDescription crcDescription) {
return construct(crcDescription, null);
}
/**
* Creation and registration of CrcModel
* @param name Name of model
* @param crcDescription CrcDescription
* @return registered model
*/
public static @NonNull CrcModel construct(@Nullable final String name, @NonNull final CrcDescription crcDescription) {
return construct(name, crcDescription, null);
}
@Generated
private static @NonNull CrcModel alias(@NonNull final String name, @NonNull CrcModel model) {
return new CrcModel(name, model.getCrcDescription(), model.getCheck());
}
protected final long reflect(long value) {
return reflect(value, getWidth());
}
protected static long reflect(long value, int bits) {
long mask = widmask(bits);
long rmask = ~mask;
long prefix = value & rmask;
long suffix = Long.reverse(value << (Long.SIZE - bits));
return prefix | suffix;
}
protected static long widmask(int width) {
return (((1L << (width-1)) - 1L) << 1) | 1L;
}
private static long gf2_matrix_times(long[] mat, long vec) {
long sum = 0L;
for (int i=0; vec != 0; vec >>>= 1, i++) {
if ((vec & 1) != 0) {
sum ^= mat[i];
}
}
return sum;
}
private static void gf2_matrix_square(long[] square, long[] mat, int width) {
for (int n = 0; n < width; n++) {
square[n] = gf2_matrix_times(mat, mat[n]);
}
}
protected static long crc_general_combine(long crc1, long crc2, int len2, int width, long init, long poly, long xorot, boolean reflect) {
int n;
long col;
long[] even = new long[width]; /* even-power-of-two zeros operator */
long[] odd = new long[width]; /* odd-power-of-two zeros operator */
if (reflect) {
init = reflect(init, width);
poly = reflect(poly, width);
}
/* degenerate case (also disallow negative lengths if type changed) */
if (len2 <= 0) {
return crc1;
}
/* exclusive-or the result with len2 zeros applied to the CRC of an empty
sequence */
crc1 ^= init ^ xorot;
/* construct the operator for one zero bit and put in odd[] */
if (reflect) {
odd[0] = poly; /* polynomial */
col = 1;
for (n = 1; n < width; n++) {
odd[n] = col;
col <<= 1;
}
} else {
col = 2;
for (n = 0; n < width - 1; n++) {
odd[n] = col;
col <<= 1;
}
odd[n] = poly; /* polynomial */
}
/* put operator for two zero bits in even[] */
gf2_matrix_square(even, odd, width);
/* put operator for four zero bits in odd[] */
gf2_matrix_square(odd, even, width);
/* apply len2 zeros to crc1 (first square will put the operator for eight
zero bits == one zero byte, in even[]) */
do {
/* apply zeros operator for this bit of len2 */
gf2_matrix_square(even, odd, width);
if ((len2 & 1) != 0) {
crc1 = gf2_matrix_times(even, crc1);
}
len2 >>>= 1;
/* if no more bits set, then done */
if (len2 == 0)
break;
/* another iteration of the loop with odd[] and even[] swapped */
gf2_matrix_square(odd, even, width);
if ((len2 & 1) != 0) {
crc1 = gf2_matrix_times(odd, crc1);
}
len2 >>>= 1;
/* if no more bits set, then done */
} while (len2 != 0);
/* return combined crc */
crc1 ^= crc2;
return crc1;
}
// CRC-3
public static final CrcModel CRC3_GSM = new CrcModel("CRC-3/GSM", 3, 0x3, 0x0, false, false, 0x7, 0x4L);
public static final CrcModel CRC3_ROHC = new CrcModel("CRC-3/ROHC", 3, 0x3, 0x7, true, true, 0x0, 0x6L);
// CRC-4
public static final CrcModel CRC4_INTERLAKEN = new CrcModel("CRC-4/INTERLAKEN", 4, 0x3, 0xf, false, false, 0xF, 0xBL);
public static final CrcModel CRC4_G_704 = new CrcModel("CRC-4/G-704", 4, 0x3, 0x0, true, true, 0x0, 0x7L);
public static final CrcModel CRC4_ITU = alias("CRC-4/ITU", CRC4_G_704);
// CRC-5
public static final CrcModel CRC5_EPC_C1G2 = new CrcModel("CRC-5/EPC-C1G2", 5, 0x9, 0x9, false, false, 0x0, 0x0L);
public static final CrcModel CRC5_EPC = alias("CRC-5/EPC", CRC5_EPC_C1G2);
public static final CrcModel CRC5_G_704 = new CrcModel("CCRC-5/G-704", 5, 0x15, 0x0, true, true, 0x0, 0x7L);
public static final CrcModel CRC5_ITU = alias("CRC-5/ITU", CRC5_G_704);
public static final CrcModel CRC5_USB = new CrcModel("CRC-5/USB", 5, 0x5, 0x1F, true, true, 0x1F, 0x19L);
// CRC-6
public static final CrcModel CRC6_CDMA2000_A = new CrcModel("CRC-6/CDMA2000-A", 6, 0x27, 0x3F, false, false, 0x0, 0xDL);
public static final CrcModel CRC6_CDMA2000_B = new CrcModel("CRC-6/CDMA2000-B", 6, 0x7, 0x3F, false, false, 0x0, 0x3BL);
public static final CrcModel CRC6_DARC = new CrcModel("CRC-6/DARC", 6, 0x19, 0x0, true, true, 0x0, 0x26L);
public static final CrcModel CRC6_GSM = new CrcModel("CRC-6/GSM", 6, 0x2F, 0x0, false, false, 0x3F, 0x13L);
public static final CrcModel CRC6_G_704 = new CrcModel("CRC-6/G-704", 6, 0x3, 0x0, true, true, 0x0, 0x6L);
public static final CrcModel CRC6_ITU = alias("CRC-6/ITU", CRC6_G_704);
// CRC-7
public static final CrcModel CRC7_MMC = new CrcModel("CRC-7/MMC", 7, 0x9, 0x0, false, false, 0x0, 0x75L);
public static final CrcModel CRC7 = alias("CRC-7", CRC7_MMC);
public static final CrcModel CRC7_ROHC = new CrcModel("CRC-7/ROHC", 7, 0x4F, 0x7F, true, true, 0x0, 0x53L);
public static final CrcModel CRC7_UMTS = new CrcModel("CRC-7/UMTS", 7, 0x45, 0x0, false, false, 0x0, 0x61L);
// CRC-8
public static final CrcModel CRC8_SMBUS = new CrcModel("CRC-8/SMBUS", 8, 0x7, 0x0, false, false, 0x0, 0xF4L);
public static final CrcModel CRC8 = alias("CRC-8", CRC8_SMBUS);
public static final CrcModel CRC8_AUTOSAR = new CrcModel("CRC-8/AUTOSAR", 8, 0x2F, 0xFF, false, false, 0xFF, 0xDFL);
public static final CrcModel CRC8_BLUETOOTH = new CrcModel("CRC-8/BLUETOOTH", 8, 0xA7, 0x0, true, true, 0x0, 0x26L);
public static final CrcModel CRC8_CDMA_2000 = new CrcModel("CRC-8/CDMA2000", 8, 0x9B, 0xFF, false, false, 0x0, 0xDAL);
public static final CrcModel CRC8_DARC = new CrcModel("CRC-8/DARC", 8, 0x39, 0x0, true, true, 0x0, 0x15L);
public static final CrcModel CRC8_DVB_S2 = new CrcModel("CRC-8/DVB-S2", 8, 0xD5, 0x0, false, false, 0x0, 0xBCL);
public static final CrcModel CRC8_TECH_3250 = new CrcModel("CRC-8/TECH-3250", 8, 0x1D, 0xFF, true, true, 0x0, 0x97L);
public static final CrcModel CRC8_AES = alias("CRC-8/AES", CRC8_TECH_3250);
public static final CrcModel CRC8_EBU = alias("CRC-8/EBU", CRC8_TECH_3250);
public static final CrcModel CRC8_GSM_A = new CrcModel("CRC-8/GSM-A", 8, 0x1D, 0x0, false, false, 0x0, 0x37L);
public static final CrcModel CRC8_GSM_B = new CrcModel("CRC-8/GSM-B", 8, 0x49, 0x0, false, false, 0xFF, 0x94L);
public static final CrcModel CRC8_ICODE = new CrcModel("CRC-8/I-CODE", 8, 0x1D, 0xFD, false, false, 0x0, 0x7EL);
public static final CrcModel CRC8_I_432_1 = new CrcModel("CRC-8/I-432-1", 8, 0x7, 0x0, false, false, 0x55, 0xA1L);
public static final CrcModel CRC8_ITU = alias("CRC-8/ITU", CRC8_I_432_1);
public static final CrcModel CRC8_LTE = new CrcModel("CRC-8/LTE", 8, 0x9B, 0x0, false, false, 0x0, 0xEAL);
public static final CrcModel CRC8_MAXIM_DOW = new CrcModel("CRC-8/MAXIM-DOW", 8, 0x31, 0x0, true, true, 0x0, 0xA1L);
public static final CrcModel CRC8_MAXIM = alias("CRC-8/MAXIM", CRC8_MAXIM_DOW);
public static final CrcModel DOW_CRC = alias("DOW-CRC", CRC8_MAXIM_DOW);
public static final CrcModel CRC8_OPENSAFETY = new CrcModel("CRC-8/OPENSAFETY", 8, 0x2F, 0x0, false, false, 0x0, 0x3EL);
public static final CrcModel CRC8_ROHC = new CrcModel("CRC-8/ROHC", 8, 0x7, 0xFF, true, true, 0x0, 0xD0L);
public static final CrcModel CRC8_SAE_J1850 = new CrcModel("CRC-8/SAE-J1850", 8, 0x1D, 0xFF, false, false, 0xFF, 0x4BL);
public static final CrcModel CRC8_WCDMA = new CrcModel("CRC-8/WCDMA", 8, 0x9B, 0x0, true, true, 0x0, 0x25L);
// CRC-10
public static final CrcModel CRC10_ATM = new CrcModel("CRC-10/ATM", 10, 0x233, 0x0, false, false, 0x0, 0x199L);
public static final CrcModel CRC10_I_610 = alias("CRC-10/I-610", CRC10_ATM);
public static final CrcModel CRC10 = alias("CRC-10", CRC10_ATM);
public static final CrcModel CRC10_CDMA2000 = new CrcModel("CRC-10/CDMA2000", 10, 0x3D9, 0x3FF, false, false, 0x0, 0x233L);
public static final CrcModel CRC10_GSM = new CrcModel("CRC-10/GSM", 10, 0x175, 0x0, false, false, 0x3FF, 0x12AL);
// CRC-11
public static final CrcModel CRC11_FLEXRAY = new CrcModel("CRC-11/FLEXRAY", 11, 0x385, 0x1A, false, false, 0x0, 0x5A3L);
public static final CrcModel CRC11 = alias("CRC-11", CRC11_FLEXRAY);
public static final CrcModel CRC11_UMTS = new CrcModel("CRC-11/UMTS", 11, 0x307, 0x0, false, false, 0x0, 0x061L);
// CRC-12
public static final CrcModel CRC12_UMTS = new CrcModel("CRC-12/UMTS", 12, 0x80F, 0x0, false, true, 0x0, 0xDAFL);
public static final CrcModel CRC12_3GPP = alias("CRC-12/3GPP", CRC12_UMTS);
public static final CrcModel CRC12_CDMA2000 = new CrcModel("CRC-12/CDMA2000", 12, 0xF13, 0xFFF, false, false, 0x0, 0xD4DL);
public static final CrcModel CRC12_DECT = new CrcModel("CRC-12/DECT", 12, 0x80F, 0x0, false, false, 0x0, 0xF5BL);
public static final CrcModel X_CRC_12 = alias("X-CRC-12", CRC12_DECT);
public static final CrcModel CRC12_GSM = new CrcModel("CRC-12/GSM", 12, 0xD31, 0x0, false, false, 0xFFF, 0xB34L);
// CRC-13
public static final CrcModel CRC13_BBC = new CrcModel("CRC-13/BBC", 13, 0x1CF5, 0x0, false, false, 0x0, 0x4FAL);
// CRC-14
public static final CrcModel CRC14_DARC = new CrcModel("CRC-14/DARC", 14, 0x805, 0x0, true, true, 0x0, 0x82DL);
public static final CrcModel CRC14_GSM = new CrcModel("CRC-14/GSM", 14, 0x202D, 0x0, false, false, 0x3fff, 0x30AEL);
// CRC-15
public static final CrcModel CRC15_CAN = new CrcModel("CRC-15/CAN", 15, 0x4599, 0x0, false, false, 0x0, 0x59EL);
public static final CrcModel CRC15 = alias("CRC-15", CRC15_CAN);
public static final CrcModel CRC15_MPT1327 = new CrcModel("CRC-15/MPT1327", 15, 0x6815, 0x0, false, false, 0x1, 0x2566L);
// CRC-16
public static final CrcModel CRC16_ARC = new CrcModel("CRC-16/ARC", 16, 0x8005, 0x0, true, true, 0x0, 0xBB3DL);
public static final CrcModel ARC = alias("ARC", CRC16_ARC);
public static final CrcModel CRC16 = alias("CRC-16", CRC16_ARC);
public static final CrcModel CRC16_LHA = alias("CRC-16/LHA", CRC16_ARC);
public static final CrcModel CRC_IBM = alias("CRC-IBM", CRC16_ARC);
public static final CrcModel CRC16_SPI_FUJITSU = new CrcModel("CRC-16/SPI-FUJITSU", 16, 0x1021, 0x1D0F, false, false, 0x0, 0xE5CCL);
public static final CrcModel CRC16_AUG_CCITT = alias("CRC-16/AUG-CCITT", CRC16_SPI_FUJITSU);
public static final CrcModel CRC16_UMTS = new CrcModel("CRC-16/UMTS", 16, 0x8005, 0x0, false, false, 0x0, 0xFEE8L);
public static final CrcModel CRC16_BUYPASS = alias("CRC-16/BUYPASS", CRC16_UMTS);
public static final CrcModel CRC16_VERIFONE = alias("CRC-16/VERIFONE", CRC16_UMTS);
public static final CrcModel CRC16_IBM_3740 = new CrcModel("CRC-16/IBM-3740", 16, 0x1021, 0xFFFF, false, false, 0x0, 0x29B1L);
public static final CrcModel CRC16_AUTOSAR = alias("CRC-16/AUTOSAR", CRC16_IBM_3740);
public static final CrcModel CRC16_CCITT_FALSE = alias("CRC-16/CCITT-FALSE", CRC16_IBM_3740);
public static final CrcModel CRC16_CDMA2000 = new CrcModel("CRC-16/CDMA2000", 16, 0xC867, 0xFFFF, false, false, 0x0, 0x4C06L);
public static final CrcModel CRC16_CMS = new CrcModel("CRC-16/CMS", 16, 0x8005, 0xFFFF, false, false, 0x0, 0xAEE7L);
public static final CrcModel CRC16_DDS_110 = new CrcModel("CRC-16/DDS-110", 16, 0x8005, 0x800D, false, false, 0x0, 0x9ECFL);
public static final CrcModel CRC16_DECT_R = new CrcModel("CRC-16/DECT-R", 16, 0x589, 0x0, false, false, 0x1, 0x7EL);
public static final CrcModel R_CRC_16 = alias("R-CRC-16", CRC16_DECT_R);
public static final CrcModel CRC16_DECT_X = new CrcModel("CRC-16/DECT-X", 16, 0x589, 0x0, false, false, 0x0, 0x7FL);
public static final CrcModel X_CRC_16 = alias("X-CRC-16", CRC16_DECT_X);
public static final CrcModel CRC16_DNP = new CrcModel("CRC-16/DNP", 16, 0x3D65, 0x0, true, true, 0xFFFF, 0xEA82L);
public static final CrcModel CRC16_EN13757 = new CrcModel("CRC-16/EN-13757", 16, 0x3D65, 0x0, false, false, 0xFFFF, 0xC2B7L);
public static final CrcModel CRC16_GENIBUS = new CrcModel("CRC-16/GENIBUS", 16, 0x1021, 0xFFFF, false, false, 0xFFFF, 0xD64EL);
public static final CrcModel CRC16_DARC = alias("CRC-16/DARC", CRC16_GENIBUS);
public static final CrcModel CRC16_EPC = alias("CRC-16/EPC", CRC16_GENIBUS);
public static final CrcModel CRC16_EPC_C1G2 = alias("CRC-16/EPC-C1G2", CRC16_GENIBUS);
public static final CrcModel CRC16_I_CODE = alias("CRC-16/I-CODE", CRC16_GENIBUS);
public static final CrcModel CRC16_GSM = new CrcModel("CRC-16/GSM", 16, 0x1021, 0x0, false, false, 0xFFFF, 0xCE3CL);
public static final CrcModel CRC16_KERMIT = new CrcModel("CRC-16/KERMIT", 16, 0x1021, 0x0, true, true, 0x0, 0x2189L);
public static final CrcModel CRC16_CCITT = alias("CRC-16/CCITT", CRC16_KERMIT);
public static final CrcModel CRC16_CCITT_TRUE = alias("CRC-16/CCITT-TRUE", CRC16_KERMIT);
public static final CrcModel CRC16_V_41_LSB = alias("CRC-16/V-41-LSB", CRC16_KERMIT);
public static final CrcModel CRC_CCITT = alias("CRC-CCITT", CRC16_KERMIT);
public static final CrcModel KERMIT = alias("KERMIT", CRC16_KERMIT);
public static final CrcModel CRC16_LJ1200 = new CrcModel("CRC-16/LJ1200", 16, 0x6F63, 0x0, false, false, 0x0, 0xBDF4L);
public static final CrcModel CRC16_MAXIM_DOW = new CrcModel("CRC-16/MAXIM-DOW", 16, 0x8005, 0x0, true, true, 0xFFFF, 0x44C2L);
public static final CrcModel CRC16_MAXIM = alias("CRC-16/MAXIM", CRC16_MAXIM_DOW);
public static final CrcModel CRC16_MCRF4XX = new CrcModel("CRC-16/MCRF4XX", 16, 0x1021, 0xFFFF, true, true, 0x0, 0x6F91L);
public static final CrcModel CRC16_MODBUS = new CrcModel("CRC-16/MODBUS", 16, 0x8005, 0xFFFF, true, true, 0x0, 0x4B37L);
public static final CrcModel MODBUS = alias("MODBUS", CRC16_MODBUS);
public static final CrcModel CRC16_OPENSAFETY_A = new CrcModel("CRC-16/OPENSAFETY-A", 16, 0x5935, 0x0, false, false, 0x0, 0x5D38L);
public static final CrcModel CRC16_OPENSAFETY_B = new CrcModel("CRC-16/OPENSAFETY-B", 16, 0x755B, 0x0, false, false, 0x0, 0x20FEL);
public static final CrcModel CRC16_PROFIBUS = new CrcModel("CRC-16/PROFIBUS", 16, 0x1DCF, 0xFFFF, false, false, 0xFFFF, 0xA819L);
public static final CrcModel CRC16_IEC_61158_2 = alias("CRC-16/IEC-61158-2", CRC16_PROFIBUS);
public static final CrcModel CRC16_RIELLO = new CrcModel("CRC-16/RIELLO", 16, 0x1021, 0xB2AA, true, true, 0x0, 0x63D0L);
public static final CrcModel CRC16_T10_DIF = new CrcModel("CRC-16/T10-DIF", 16, 0x8BB7, 0x0, false, false, 0x0, 0xD0DBL);
public static final CrcModel CRC16_TELEDISK = new CrcModel("CRC-16/TELEDISK", 16, 0xA097, 0x0, false, false, 0x0, 0xFB3L);
public static final CrcModel CRC16_TMS37157 = new CrcModel("CRC-16/TMS37157", 16, 0x1021, 0x89EC, true, true, 0x0, 0x26B1L);
public static final CrcModel CRC16_USB = new CrcModel("CRC-16/USB", 16, 0x8005, 0xFFFF, true, true, 0xFFFF, 0xB4C8L);
public static final CrcModel CRC16_ISO_IEC_14443_3_A = new CrcModel("CRC-16/ISO-IEC-14443-3-A", 16, 0x1021, 0xc6c6, true, true, 0x0, 0xBF05L);
public static final CrcModel CRC_A = alias("CRC-A", CRC16_ISO_IEC_14443_3_A);
public static final CrcModel CRC16_XMODEM = new CrcModel("CRC-16/XMODEM", 16, 0x1021, 0x0, false, false, 0x0, 0x31C3L);
public static final CrcModel CRC16_ACORN = alias("CRC-16/ACORN", CRC16_XMODEM);
public static final CrcModel CRC16_LTE = alias("CRC-16/LTE", CRC16_XMODEM);
public static final CrcModel CRC16_V_41_MSB = alias("CRC-16/V-41-MSB", CRC16_XMODEM);
public static final CrcModel XMODEM = alias("XMODEM", CRC16_XMODEM);
public static final CrcModel ZMODEM = alias("ZMODEM", CRC16_XMODEM);
public static final CrcModel CRC16_IBM_SDLC = new CrcModel("CRC-16/IBM-SDLC", 16, 0x1021, 0xFFFF, true, true, 0xFFFF, 0x906EL);
public static final CrcModel CRC16_ISO_HDLC = alias("CRC-16/ISO-HDLC", CRC16_IBM_SDLC);
public static final CrcModel CRC16_ISO_IEC_14443_3_B = alias("CRC-16/ISO-IEC-14443-3-B", CRC16_IBM_SDLC);
public static final CrcModel CRC16_X_25 = alias("CRC-16/X-25", CRC16_IBM_SDLC);
public static final CrcModel CRCB = alias("CRC-B", CRC16_IBM_SDLC);
public static final CrcModel X_25 = alias("X-25", CRC16_IBM_SDLC);
// CRC-17
public static final CrcModel CRC17_CAN_FD = new CrcModel("CRC-17/CAN-FD", 17, 0x1685B, 0x0, false, false, 0x0, 0x04F03L);
// CRC-21
public static final CrcModel CRC21_CAN_FD = new CrcModel("CRC-21/CAN-FD", 21, 0x102899, 0x0, false, false, 0x0, 0x0ED841L);
// CRC-24
public static final CrcModel CRC24_OPENPGP = new CrcModel("CRC-24/OPENPGP", 24, 0x864CFB, 0xB704CE, false, false, 0x0, 0x21CF02L);
public static final CrcModel CRC24 = alias("CRC-24", CRC24_OPENPGP);
public static final CrcModel CRC24_BLE = new CrcModel("CRC-24/BLE", 24, 0x65B, 0x555555, true, true, 0x0, 0xC25A56L);
public static final CrcModel CRC24_FLEXRAY_A = new CrcModel("CRC-24/FLEXRAY-A", 24, 0x5D6DCB, 0xFEDCBA, false, false, 0x0, 0x7979BDL);
public static final CrcModel CRC24_FLEXRAY_B = new CrcModel("CRC-24/FLEXRAY-B", 24, 0x5D6DCB, 0xABCDEF, false, false, 0x0, 0x1F23B8L);
public static final CrcModel CRC24_INTERLAKEN = new CrcModel("CRC-24/INTERLAKEN", 24, 0x328B63, 0xFFFFFF, false, false, 0xFFFFFF, 0xB4F3E6L);
public static final CrcModel CRC24_LTE_A = new CrcModel("CRC-24/LTE-A", 24, 0x864CFB, 0x0, false, false, 0x0, 0xCDE703L);
public static final CrcModel CRC24_LTE_B = new CrcModel("CRC-24/LTE-B", 24, 0x800063, 0x0, false, false, 0x0, 0x23EF52L);
// CRC-30
public static final CrcModel CRC30_CDMA = new CrcModel("CRC-30/CDMA", 30, 0x2030B9C7, 0x3FFFFFFF, false, false , 0x3FFFFFFFL, 0x04C34ABFL);
// CRC-31
public static final CrcModel CRC31_PHILIPS = new CrcModel("CRC-31/PHILIPS", 31, 0x4C11DB7, 0x7FFFFFFF, false, false , 0x7FFFFFFFL, 0xCE9E46CL);
// CRC-32
public static final CrcModel CRC32_ISO_HDLC = new CrcModel("CRC-32/ISO-HDLC", 32, 0x04C11DB7L, 0xFFFFFFFFL, true, true, 0xFFFFFFFFL, 0xCBF43926L);
public static final CrcModel CRC32 = alias("CRC-32", CRC32_ISO_HDLC);
public static final CrcModel CRC32_ADCCP = alias("CRC-32/ADCCP", CRC32_ISO_HDLC);
public static final CrcModel CRC32_V42 = alias("CRC-32/V-42", CRC32_ISO_HDLC);
public static final CrcModel CRC32_XZ = alias("CRC-32/XZ", CRC32_ISO_HDLC);
public static final CrcModel PKZIP = alias("PKZIP", CRC32_ISO_HDLC);
public static final CrcModel CRC32_AUTOSAR = new CrcModel("CRC-32/AUTOSAR", 32, 0xF4ACFB13L, 0xFFFFFFFFL, true, true, 0xFFFFFFFFL, 0x1697D06AL);
public static final CrcModel CRC32_BZIP2 = new CrcModel("CRC-32/BZIP2", 32, 0x04C11DB7L, 0xFFFFFFFFL, false, false, 0xFFFFFFFFL, 0xFC891918L);
public static final CrcModel CRC32_AAL5 = alias("CRC-32/AAL5", CRC32_BZIP2);
public static final CrcModel CRC32_DECT_B = alias("CRC-32/DECT-B", CRC32_BZIP2);
public static final CrcModel B_CRC_32 = alias("B-CRC-32", CRC32_BZIP2);
public static final CrcModel CRC32_ISCSI = new CrcModel("CRC-32/ISCSI", 32, 0x1EDC6F41L, 0xFFFFFFFFL, true, true, 0xFFFFFFFFL, 0xE3069283L);
public static final CrcModel CRC32_BASE91_C = alias("CRC-32/BASE91-C", CRC32_ISCSI);
public static final CrcModel CRC32_CASTAGNOLI = alias("CRC-32/CASTAGNOLI", CRC32_ISCSI);
public static final CrcModel CRC32_INTERLAKEN = alias("CRC-32/INTERLAKEN", CRC32_ISCSI);
public static final CrcModel CRC32_C = alias("CRC32_C ", CRC32_ISCSI);
public static final CrcModel CRC32_BASE91_D = new CrcModel("CRC-32/BASE91-D", 32, 0xA833982BL, 0xFFFFFFFFL, true, true, 0xFFFFFFFFL, 0x87315576L);
public static final CrcModel CRC32_D = alias("CRC-32D", CRC32_BASE91_D);
public static final CrcModel CRC32_JAMCRC = new CrcModel("CRC-32/JAMCRC", 32, 0x04C11DB7L, 0xFFFFFFFFL, true, true, 0x00000000L, 0x340BC6D9L);
public static final CrcModel JAMCRC = alias("JAMCRC", CRC32_JAMCRC);
public static final CrcModel CRC32_MPEG_2 = new CrcModel("CRC-32/MPEG-2", 32, 0x04C11DB7L, 0xFFFFFFFFL, false, false, 0x00000000L, 0x0376E6E7L);
public static final CrcModel CRC32_CKSUM = new CrcModel("CRC-32/CKSUM", 32, 0x04C11DB7L, 0x00000000L, false, false, 0xFFFFFFFFL, 0x765E7680L);
public static final CrcModel CKSUM = alias("CKSUM", CRC32_CKSUM);
public static final CrcModel CRC32_POSIX = alias("CRC-32/POSIX", CRC32_CKSUM);
public static final CrcModel CRC32_AIXM = new CrcModel("CRC-32/AIXM", 32, 0x814141ABL, 0x00000000L, false, false, 0x00000000L, 0x3010BF7FL);
public static final CrcModel CRC32_Q = alias("CRC-32Q", CRC32_AIXM);
public static final CrcModel CRC32_XFER = new CrcModel("CRC-32/XFER", 32, 0x000000AFL, 0x00000000L, false, false, 0x00000000L, 0xBD0BE338L);
public static final CrcModel XFER = alias("XFER", CRC32_XFER);
// CRC-40
public static final CrcModel CRC40_GSM = new CrcModel("CRC-40/GSM", 40, 0x4820009, 0x0, false, false, 0xFFFFFFFFFFL, 0xD4164FC646L);
// CRC-64
public static final CrcModel CRC64_GO_ISO = new CrcModel("CRC-64/GO-ISO",64, 0x000000000000001BL, 0xFFFFFFFFFFFFFFFFL, true, true, 0xFFFFFFFFFFFFFFFFL, 0xB90956C775A41001L);
public static final CrcModel CRC64_ECMA_182 = new CrcModel("CRC-64/ECMA-182",64, 0x42F0E1EBA9EA3693L, 0x00000000L, false, false, 0x00000000L, 0x6C40DF5F0B497347L);
public static final CrcModel CRC64 = alias("CRC-64", CRC64_ECMA_182);
public static final CrcModel CRC64_WE = new CrcModel("CRC-64/WE", 64, 0x42F0E1EBA9EA3693L, 0xFFFFFFFFFFFFFFFFL, false, false, 0xFFFFFFFFFFFFFFFFL,0x62EC59E3F1A4F00AL);
public static final CrcModel CRC64_XZ = new CrcModel("CRC-64/XZ", 64, 0x42F0E1EBA9EA3693L, 0xFFFFFFFFFFFFFFFFL, true, true, 0xFFFFFFFFFFFFFFFFL,0x995DC9BBDF1939FAL);
public static final CrcModel CRC64_GO_ECMA = alias("CRC-64/GO-ECMA", CRC64_XZ);
}