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2_29 | /*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
* This project is based on a modification of https://github.com/uber/h3 which is licensed under the Apache 2.0 License.
*
* Copyright 2016-2018, 2020-2021 Uber Technologies, Inc.
*/
package org.elasticsearch.h3;
/**
* Mutable IJK hexagon coordinates
*
* Each axis is spaced 120 degrees apart.
*
* References two Vec2d cartesian coordinate systems:
*
* 1. gnomonic: face-centered polyhedral gnomonic projection space with
* traditional scaling and x-axes aligned with the face Class II
* i-axes.
*
* 2. hex2d: local face-centered coordinate system scaled a specific H3 grid
* resolution unit length and with x-axes aligned with the local
* i-axes
*/
final class CoordIJK {
/** CoordIJK unit vectors corresponding to the 7 H3 digits.
*/
private static final int[][] UNIT_VECS = {
{ 0, 0, 0 }, // direction 0
{ 0, 0, 1 }, // direction 1
{ 0, 1, 0 }, // direction 2
{ 0, 1, 1 }, // direction 3
{ 1, 0, 0 }, // direction 4
{ 1, 0, 1 }, // direction 5
{ 1, 1, 0 } // direction 6
};
/** H3 digit representing ijk+ axes direction.
* Values will be within the lowest 3 bits of an integer.
*/
public enum Direction {
CENTER_DIGIT(0),
K_AXES_DIGIT(1),
J_AXES_DIGIT(2),
JK_AXES_DIGIT(J_AXES_DIGIT.digit() | K_AXES_DIGIT.digit()),
I_AXES_DIGIT(4),
IK_AXES_DIGIT(I_AXES_DIGIT.digit() | K_AXES_DIGIT.digit()),
IJ_AXES_DIGIT(I_AXES_DIGIT.digit() | J_AXES_DIGIT.digit()),
INVALID_DIGIT(7),
NUM_DIGITS(INVALID_DIGIT.digit()),
PENTAGON_SKIPPED_DIGIT(K_AXES_DIGIT.digit());
Direction(int digit) {
this.digit = digit;
}
private final int digit;
public int digit() {
return digit;
}
}
int i; // i component
int j; // j component
int k; // k component
CoordIJK(int i, int j, int k) {
this.i = i;
this.j = j;
this.k = k;
}
/**
* Reset the value of the IJK coordinates to the provided ones.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
void reset(int i, int j, int k) {
this.i = i;
this.j = j;
this.k = k;
}
/**
* Find the center point in 2D cartesian coordinates of a hex.
*/
public Vec2d ijkToHex2d() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
return new Vec2d(i - 0.5 * j, j * Constants.M_SQRT3_2);
}
/**
* Find the center point in spherical coordinates of a hex on a particular icosahedral face.
*/
public LatLng ijkToGeo(int face, int res, boolean substrate) {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
return Vec2d.hex2dToGeo(i - 0.5 * j, j * Constants.M_SQRT3_2, face, res, substrate);
}
/**
* Add ijk coordinates.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
public void ijkAdd(int i, int j, int k) {
this.i = Math.addExact(this.i, i);
this.j = Math.addExact(this.j, j);
this.k = Math.addExact(this.k, k);
}
/**
* Subtract ijk coordinates.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
public void ijkSub(int i, int j, int k) {
this.i = Math.subtractExact(this.i, i);
this.j = Math.subtractExact(this.j, j);
this.k = Math.subtractExact(this.k, k);
}
/**
* Normalizes ijk coordinates by setting the ijk coordinates
* to the smallest possible positive values.
*/
public void ijkNormalize() {
final int min = Math.min(i, Math.min(j, k));
ijkSub(min, min, min);
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 7 counter-clockwise resolution.
*/
public void downAp7() {
// res r unit vectors in res r+1
// iVec (3, 0, 1)
// jVec (1, 3, 0)
// kVec (0, 1, 3)
final int i = Math.addExact(Math.multiplyExact(this.i, 3), this.j);
final int j = Math.addExact(Math.multiplyExact(this.j, 3), this.k);
final int k = Math.addExact(Math.multiplyExact(this.k, 3), this.i);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 7 clockwise resolution.
*/
public void downAp7r() {
// iVec (3, 1, 0)
// jVec (0, 3, 1)
// kVec (1, 0, 3)
final int i = Math.addExact(Math.multiplyExact(this.i, 3), this.k);
final int j = Math.addExact(Math.multiplyExact(this.j, 3), this.i);
final int k = Math.addExact(Math.multiplyExact(this.k, 3), this.j);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 3 counter-clockwise resolution.
*/
public void downAp3() {
// res r unit vectors in res r+1
// iVec (2, 0, 1)
// jVec (1, 2, 0)
// kVec (0, 1, 2)
final int i = Math.addExact(Math.multiplyExact(this.i, 2), this.j);
final int j = Math.addExact(Math.multiplyExact(this.j, 2), this.k);
final int k = Math.addExact(Math.multiplyExact(this.k, 2), this.i);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 3 clockwise resolution.
*/
public void downAp3r() {
// res r unit vectors in res r+1
// iVec (2, 1, 0)
// jVec (0, 2, 1)
// kVec (1, 0, 2)
final int i = Math.addExact(Math.multiplyExact(this.i, 2), this.k);
final int j = Math.addExact(Math.multiplyExact(this.j, 2), this.i);
final int k = Math.addExact(Math.multiplyExact(this.k, 2), this.j);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Rotates ijk coordinates 60 degrees clockwise.
*
*/
public void ijkRotate60cw() {
// unit vector rotations
// iVec (1, 0, 1)
// jVec (1, 1, 0)
// kVec (0, 1, 1)
final int i = Math.addExact(this.i, this.j);
final int j = Math.addExact(this.j, this.k);
final int k = Math.addExact(this.i, this.k);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Rotates ijk coordinates 60 degrees counter-clockwise.
*/
public void ijkRotate60ccw() {
// unit vector rotations
// iVec (1, 1, 0)
// jVec (0, 1, 1)
// kVec (1, 0, 1)
final int i = Math.addExact(this.i, this.k);
final int j = Math.addExact(this.i, this.j);
final int k = Math.addExact(this.j, this.k);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex in the specified digit
* direction from the current ijk coordinates.
* @param digit The digit direction from the original ijk coordinates.
*/
public void neighbor(int digit) {
if (digit > Direction.CENTER_DIGIT.digit() && digit < Direction.NUM_DIGITS.digit()) {
ijkAdd(UNIT_VECS[digit][0], UNIT_VECS[digit][1], UNIT_VECS[digit][2]);
ijkNormalize();
}
}
/**
* Find the normalized ijk coordinates of the indexing parent of a cell in a
* clockwise aperture 7 grid.
*/
public void upAp7r() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
this.i = (int) Math.round((Math.addExact(Math.multiplyExact(2, i), j)) / 7.0);
this.j = (int) Math.round((Math.subtractExact(Math.multiplyExact(3, j), i)) / 7.0);
this.k = 0;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the indexing parent of a cell in a
* counter-clockwise aperture 7 grid.
*
*/
public void upAp7() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
this.i = (int) Math.round((Math.subtractExact(Math.multiplyExact(3, i), j)) / 7.0);
this.j = (int) Math.round((Math.addExact(Math.multiplyExact(2, j), i)) / 7.0);
this.k = 0;
ijkNormalize();
}
/**
* Determines the H3 digit corresponding to a unit vector in ijk coordinates.
*
* @return The H3 digit (0-6) corresponding to the ijk unit vector, or
* INVALID_DIGIT on failure.
*/
public int unitIjkToDigit() {
// should be call on a normalized object
if (Math.min(i, Math.min(j, k)) < 0 || Math.max(i, Math.max(j, k)) > 1) {
return Direction.INVALID_DIGIT.digit();
}
return i << 2 | j << 1 | k;
}
/**
* Rotates indexing digit 60 degrees clockwise. Returns result.
*
* @param digit Indexing digit (between 1 and 6 inclusive)
*/
public static int rotate60cw(int digit) {
return switch (digit) {
case 1 -> // K_AXES_DIGIT
Direction.JK_AXES_DIGIT.digit();
case 3 -> // JK_AXES_DIGIT:
Direction.J_AXES_DIGIT.digit();
case 2 -> // J_AXES_DIGIT:
Direction.IJ_AXES_DIGIT.digit();
case 6 -> // IJ_AXES_DIGIT
Direction.I_AXES_DIGIT.digit();
case 4 -> // I_AXES_DIGIT
Direction.IK_AXES_DIGIT.digit();
case 5 -> // IK_AXES_DIGIT
Direction.K_AXES_DIGIT.digit();
default -> digit;
};
}
/**
* Rotates indexing digit 60 degrees counter-clockwise. Returns result.
*
* @param digit Indexing digit (between 1 and 6 inclusive)
*/
public static int rotate60ccw(int digit) {
return switch (digit) {
case 1 -> // K_AXES_DIGIT
Direction.IK_AXES_DIGIT.digit();
case 5 -> // IK_AXES_DIGIT
Direction.I_AXES_DIGIT.digit();
case 4 -> // I_AXES_DIGIT
Direction.IJ_AXES_DIGIT.digit();
case 6 -> // IJ_AXES_DIGIT
Direction.J_AXES_DIGIT.digit();
case 2 -> // J_AXES_DIGIT:
Direction.JK_AXES_DIGIT.digit();
case 3 -> // JK_AXES_DIGIT:
Direction.K_AXES_DIGIT.digit();
default -> digit;
};
}
}
| elastic/elasticsearch | libs/h3/src/main/java/org/elasticsearch/h3/CoordIJK.java | 3,778 | /**
* Rotates ijk coordinates 60 degrees clockwise.
*
*/ | block_comment | nl | /*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
* This project is based on a modification of https://github.com/uber/h3 which is licensed under the Apache 2.0 License.
*
* Copyright 2016-2018, 2020-2021 Uber Technologies, Inc.
*/
package org.elasticsearch.h3;
/**
* Mutable IJK hexagon coordinates
*
* Each axis is spaced 120 degrees apart.
*
* References two Vec2d cartesian coordinate systems:
*
* 1. gnomonic: face-centered polyhedral gnomonic projection space with
* traditional scaling and x-axes aligned with the face Class II
* i-axes.
*
* 2. hex2d: local face-centered coordinate system scaled a specific H3 grid
* resolution unit length and with x-axes aligned with the local
* i-axes
*/
final class CoordIJK {
/** CoordIJK unit vectors corresponding to the 7 H3 digits.
*/
private static final int[][] UNIT_VECS = {
{ 0, 0, 0 }, // direction 0
{ 0, 0, 1 }, // direction 1
{ 0, 1, 0 }, // direction 2
{ 0, 1, 1 }, // direction 3
{ 1, 0, 0 }, // direction 4
{ 1, 0, 1 }, // direction 5
{ 1, 1, 0 } // direction 6
};
/** H3 digit representing ijk+ axes direction.
* Values will be within the lowest 3 bits of an integer.
*/
public enum Direction {
CENTER_DIGIT(0),
K_AXES_DIGIT(1),
J_AXES_DIGIT(2),
JK_AXES_DIGIT(J_AXES_DIGIT.digit() | K_AXES_DIGIT.digit()),
I_AXES_DIGIT(4),
IK_AXES_DIGIT(I_AXES_DIGIT.digit() | K_AXES_DIGIT.digit()),
IJ_AXES_DIGIT(I_AXES_DIGIT.digit() | J_AXES_DIGIT.digit()),
INVALID_DIGIT(7),
NUM_DIGITS(INVALID_DIGIT.digit()),
PENTAGON_SKIPPED_DIGIT(K_AXES_DIGIT.digit());
Direction(int digit) {
this.digit = digit;
}
private final int digit;
public int digit() {
return digit;
}
}
int i; // i component
int j; // j component
int k; // k component
CoordIJK(int i, int j, int k) {
this.i = i;
this.j = j;
this.k = k;
}
/**
* Reset the value of the IJK coordinates to the provided ones.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
void reset(int i, int j, int k) {
this.i = i;
this.j = j;
this.k = k;
}
/**
* Find the center point in 2D cartesian coordinates of a hex.
*/
public Vec2d ijkToHex2d() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
return new Vec2d(i - 0.5 * j, j * Constants.M_SQRT3_2);
}
/**
* Find the center point in spherical coordinates of a hex on a particular icosahedral face.
*/
public LatLng ijkToGeo(int face, int res, boolean substrate) {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
return Vec2d.hex2dToGeo(i - 0.5 * j, j * Constants.M_SQRT3_2, face, res, substrate);
}
/**
* Add ijk coordinates.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
public void ijkAdd(int i, int j, int k) {
this.i = Math.addExact(this.i, i);
this.j = Math.addExact(this.j, j);
this.k = Math.addExact(this.k, k);
}
/**
* Subtract ijk coordinates.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
public void ijkSub(int i, int j, int k) {
this.i = Math.subtractExact(this.i, i);
this.j = Math.subtractExact(this.j, j);
this.k = Math.subtractExact(this.k, k);
}
/**
* Normalizes ijk coordinates by setting the ijk coordinates
* to the smallest possible positive values.
*/
public void ijkNormalize() {
final int min = Math.min(i, Math.min(j, k));
ijkSub(min, min, min);
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 7 counter-clockwise resolution.
*/
public void downAp7() {
// res r unit vectors in res r+1
// iVec (3, 0, 1)
// jVec (1, 3, 0)
// kVec (0, 1, 3)
final int i = Math.addExact(Math.multiplyExact(this.i, 3), this.j);
final int j = Math.addExact(Math.multiplyExact(this.j, 3), this.k);
final int k = Math.addExact(Math.multiplyExact(this.k, 3), this.i);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 7 clockwise resolution.
*/
public void downAp7r() {
// iVec (3, 1, 0)
// jVec (0, 3, 1)
// kVec (1, 0, 3)
final int i = Math.addExact(Math.multiplyExact(this.i, 3), this.k);
final int j = Math.addExact(Math.multiplyExact(this.j, 3), this.i);
final int k = Math.addExact(Math.multiplyExact(this.k, 3), this.j);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 3 counter-clockwise resolution.
*/
public void downAp3() {
// res r unit vectors in res r+1
// iVec (2, 0, 1)
// jVec (1, 2, 0)
// kVec (0, 1, 2)
final int i = Math.addExact(Math.multiplyExact(this.i, 2), this.j);
final int j = Math.addExact(Math.multiplyExact(this.j, 2), this.k);
final int k = Math.addExact(Math.multiplyExact(this.k, 2), this.i);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 3 clockwise resolution.
*/
public void downAp3r() {
// res r unit vectors in res r+1
// iVec (2, 1, 0)
// jVec (0, 2, 1)
// kVec (1, 0, 2)
final int i = Math.addExact(Math.multiplyExact(this.i, 2), this.k);
final int j = Math.addExact(Math.multiplyExact(this.j, 2), this.i);
final int k = Math.addExact(Math.multiplyExact(this.k, 2), this.j);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Rotates ijk coordinates<SUF>*/
public void ijkRotate60cw() {
// unit vector rotations
// iVec (1, 0, 1)
// jVec (1, 1, 0)
// kVec (0, 1, 1)
final int i = Math.addExact(this.i, this.j);
final int j = Math.addExact(this.j, this.k);
final int k = Math.addExact(this.i, this.k);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Rotates ijk coordinates 60 degrees counter-clockwise.
*/
public void ijkRotate60ccw() {
// unit vector rotations
// iVec (1, 1, 0)
// jVec (0, 1, 1)
// kVec (1, 0, 1)
final int i = Math.addExact(this.i, this.k);
final int j = Math.addExact(this.i, this.j);
final int k = Math.addExact(this.j, this.k);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex in the specified digit
* direction from the current ijk coordinates.
* @param digit The digit direction from the original ijk coordinates.
*/
public void neighbor(int digit) {
if (digit > Direction.CENTER_DIGIT.digit() && digit < Direction.NUM_DIGITS.digit()) {
ijkAdd(UNIT_VECS[digit][0], UNIT_VECS[digit][1], UNIT_VECS[digit][2]);
ijkNormalize();
}
}
/**
* Find the normalized ijk coordinates of the indexing parent of a cell in a
* clockwise aperture 7 grid.
*/
public void upAp7r() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
this.i = (int) Math.round((Math.addExact(Math.multiplyExact(2, i), j)) / 7.0);
this.j = (int) Math.round((Math.subtractExact(Math.multiplyExact(3, j), i)) / 7.0);
this.k = 0;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the indexing parent of a cell in a
* counter-clockwise aperture 7 grid.
*
*/
public void upAp7() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
this.i = (int) Math.round((Math.subtractExact(Math.multiplyExact(3, i), j)) / 7.0);
this.j = (int) Math.round((Math.addExact(Math.multiplyExact(2, j), i)) / 7.0);
this.k = 0;
ijkNormalize();
}
/**
* Determines the H3 digit corresponding to a unit vector in ijk coordinates.
*
* @return The H3 digit (0-6) corresponding to the ijk unit vector, or
* INVALID_DIGIT on failure.
*/
public int unitIjkToDigit() {
// should be call on a normalized object
if (Math.min(i, Math.min(j, k)) < 0 || Math.max(i, Math.max(j, k)) > 1) {
return Direction.INVALID_DIGIT.digit();
}
return i << 2 | j << 1 | k;
}
/**
* Rotates indexing digit 60 degrees clockwise. Returns result.
*
* @param digit Indexing digit (between 1 and 6 inclusive)
*/
public static int rotate60cw(int digit) {
return switch (digit) {
case 1 -> // K_AXES_DIGIT
Direction.JK_AXES_DIGIT.digit();
case 3 -> // JK_AXES_DIGIT:
Direction.J_AXES_DIGIT.digit();
case 2 -> // J_AXES_DIGIT:
Direction.IJ_AXES_DIGIT.digit();
case 6 -> // IJ_AXES_DIGIT
Direction.I_AXES_DIGIT.digit();
case 4 -> // I_AXES_DIGIT
Direction.IK_AXES_DIGIT.digit();
case 5 -> // IK_AXES_DIGIT
Direction.K_AXES_DIGIT.digit();
default -> digit;
};
}
/**
* Rotates indexing digit 60 degrees counter-clockwise. Returns result.
*
* @param digit Indexing digit (between 1 and 6 inclusive)
*/
public static int rotate60ccw(int digit) {
return switch (digit) {
case 1 -> // K_AXES_DIGIT
Direction.IK_AXES_DIGIT.digit();
case 5 -> // IK_AXES_DIGIT
Direction.I_AXES_DIGIT.digit();
case 4 -> // I_AXES_DIGIT
Direction.IJ_AXES_DIGIT.digit();
case 6 -> // IJ_AXES_DIGIT
Direction.J_AXES_DIGIT.digit();
case 2 -> // J_AXES_DIGIT:
Direction.JK_AXES_DIGIT.digit();
case 3 -> // JK_AXES_DIGIT:
Direction.K_AXES_DIGIT.digit();
default -> digit;
};
}
}
|
2_34 | /*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
* This project is based on a modification of https://github.com/uber/h3 which is licensed under the Apache 2.0 License.
*
* Copyright 2016-2018, 2020-2021 Uber Technologies, Inc.
*/
package org.elasticsearch.h3;
/**
* Mutable IJK hexagon coordinates
*
* Each axis is spaced 120 degrees apart.
*
* References two Vec2d cartesian coordinate systems:
*
* 1. gnomonic: face-centered polyhedral gnomonic projection space with
* traditional scaling and x-axes aligned with the face Class II
* i-axes.
*
* 2. hex2d: local face-centered coordinate system scaled a specific H3 grid
* resolution unit length and with x-axes aligned with the local
* i-axes
*/
final class CoordIJK {
/** CoordIJK unit vectors corresponding to the 7 H3 digits.
*/
private static final int[][] UNIT_VECS = {
{ 0, 0, 0 }, // direction 0
{ 0, 0, 1 }, // direction 1
{ 0, 1, 0 }, // direction 2
{ 0, 1, 1 }, // direction 3
{ 1, 0, 0 }, // direction 4
{ 1, 0, 1 }, // direction 5
{ 1, 1, 0 } // direction 6
};
/** H3 digit representing ijk+ axes direction.
* Values will be within the lowest 3 bits of an integer.
*/
public enum Direction {
CENTER_DIGIT(0),
K_AXES_DIGIT(1),
J_AXES_DIGIT(2),
JK_AXES_DIGIT(J_AXES_DIGIT.digit() | K_AXES_DIGIT.digit()),
I_AXES_DIGIT(4),
IK_AXES_DIGIT(I_AXES_DIGIT.digit() | K_AXES_DIGIT.digit()),
IJ_AXES_DIGIT(I_AXES_DIGIT.digit() | J_AXES_DIGIT.digit()),
INVALID_DIGIT(7),
NUM_DIGITS(INVALID_DIGIT.digit()),
PENTAGON_SKIPPED_DIGIT(K_AXES_DIGIT.digit());
Direction(int digit) {
this.digit = digit;
}
private final int digit;
public int digit() {
return digit;
}
}
int i; // i component
int j; // j component
int k; // k component
CoordIJK(int i, int j, int k) {
this.i = i;
this.j = j;
this.k = k;
}
/**
* Reset the value of the IJK coordinates to the provided ones.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
void reset(int i, int j, int k) {
this.i = i;
this.j = j;
this.k = k;
}
/**
* Find the center point in 2D cartesian coordinates of a hex.
*/
public Vec2d ijkToHex2d() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
return new Vec2d(i - 0.5 * j, j * Constants.M_SQRT3_2);
}
/**
* Find the center point in spherical coordinates of a hex on a particular icosahedral face.
*/
public LatLng ijkToGeo(int face, int res, boolean substrate) {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
return Vec2d.hex2dToGeo(i - 0.5 * j, j * Constants.M_SQRT3_2, face, res, substrate);
}
/**
* Add ijk coordinates.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
public void ijkAdd(int i, int j, int k) {
this.i = Math.addExact(this.i, i);
this.j = Math.addExact(this.j, j);
this.k = Math.addExact(this.k, k);
}
/**
* Subtract ijk coordinates.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
public void ijkSub(int i, int j, int k) {
this.i = Math.subtractExact(this.i, i);
this.j = Math.subtractExact(this.j, j);
this.k = Math.subtractExact(this.k, k);
}
/**
* Normalizes ijk coordinates by setting the ijk coordinates
* to the smallest possible positive values.
*/
public void ijkNormalize() {
final int min = Math.min(i, Math.min(j, k));
ijkSub(min, min, min);
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 7 counter-clockwise resolution.
*/
public void downAp7() {
// res r unit vectors in res r+1
// iVec (3, 0, 1)
// jVec (1, 3, 0)
// kVec (0, 1, 3)
final int i = Math.addExact(Math.multiplyExact(this.i, 3), this.j);
final int j = Math.addExact(Math.multiplyExact(this.j, 3), this.k);
final int k = Math.addExact(Math.multiplyExact(this.k, 3), this.i);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 7 clockwise resolution.
*/
public void downAp7r() {
// iVec (3, 1, 0)
// jVec (0, 3, 1)
// kVec (1, 0, 3)
final int i = Math.addExact(Math.multiplyExact(this.i, 3), this.k);
final int j = Math.addExact(Math.multiplyExact(this.j, 3), this.i);
final int k = Math.addExact(Math.multiplyExact(this.k, 3), this.j);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 3 counter-clockwise resolution.
*/
public void downAp3() {
// res r unit vectors in res r+1
// iVec (2, 0, 1)
// jVec (1, 2, 0)
// kVec (0, 1, 2)
final int i = Math.addExact(Math.multiplyExact(this.i, 2), this.j);
final int j = Math.addExact(Math.multiplyExact(this.j, 2), this.k);
final int k = Math.addExact(Math.multiplyExact(this.k, 2), this.i);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 3 clockwise resolution.
*/
public void downAp3r() {
// res r unit vectors in res r+1
// iVec (2, 1, 0)
// jVec (0, 2, 1)
// kVec (1, 0, 2)
final int i = Math.addExact(Math.multiplyExact(this.i, 2), this.k);
final int j = Math.addExact(Math.multiplyExact(this.j, 2), this.i);
final int k = Math.addExact(Math.multiplyExact(this.k, 2), this.j);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Rotates ijk coordinates 60 degrees clockwise.
*
*/
public void ijkRotate60cw() {
// unit vector rotations
// iVec (1, 0, 1)
// jVec (1, 1, 0)
// kVec (0, 1, 1)
final int i = Math.addExact(this.i, this.j);
final int j = Math.addExact(this.j, this.k);
final int k = Math.addExact(this.i, this.k);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Rotates ijk coordinates 60 degrees counter-clockwise.
*/
public void ijkRotate60ccw() {
// unit vector rotations
// iVec (1, 1, 0)
// jVec (0, 1, 1)
// kVec (1, 0, 1)
final int i = Math.addExact(this.i, this.k);
final int j = Math.addExact(this.i, this.j);
final int k = Math.addExact(this.j, this.k);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex in the specified digit
* direction from the current ijk coordinates.
* @param digit The digit direction from the original ijk coordinates.
*/
public void neighbor(int digit) {
if (digit > Direction.CENTER_DIGIT.digit() && digit < Direction.NUM_DIGITS.digit()) {
ijkAdd(UNIT_VECS[digit][0], UNIT_VECS[digit][1], UNIT_VECS[digit][2]);
ijkNormalize();
}
}
/**
* Find the normalized ijk coordinates of the indexing parent of a cell in a
* clockwise aperture 7 grid.
*/
public void upAp7r() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
this.i = (int) Math.round((Math.addExact(Math.multiplyExact(2, i), j)) / 7.0);
this.j = (int) Math.round((Math.subtractExact(Math.multiplyExact(3, j), i)) / 7.0);
this.k = 0;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the indexing parent of a cell in a
* counter-clockwise aperture 7 grid.
*
*/
public void upAp7() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
this.i = (int) Math.round((Math.subtractExact(Math.multiplyExact(3, i), j)) / 7.0);
this.j = (int) Math.round((Math.addExact(Math.multiplyExact(2, j), i)) / 7.0);
this.k = 0;
ijkNormalize();
}
/**
* Determines the H3 digit corresponding to a unit vector in ijk coordinates.
*
* @return The H3 digit (0-6) corresponding to the ijk unit vector, or
* INVALID_DIGIT on failure.
*/
public int unitIjkToDigit() {
// should be call on a normalized object
if (Math.min(i, Math.min(j, k)) < 0 || Math.max(i, Math.max(j, k)) > 1) {
return Direction.INVALID_DIGIT.digit();
}
return i << 2 | j << 1 | k;
}
/**
* Rotates indexing digit 60 degrees clockwise. Returns result.
*
* @param digit Indexing digit (between 1 and 6 inclusive)
*/
public static int rotate60cw(int digit) {
return switch (digit) {
case 1 -> // K_AXES_DIGIT
Direction.JK_AXES_DIGIT.digit();
case 3 -> // JK_AXES_DIGIT:
Direction.J_AXES_DIGIT.digit();
case 2 -> // J_AXES_DIGIT:
Direction.IJ_AXES_DIGIT.digit();
case 6 -> // IJ_AXES_DIGIT
Direction.I_AXES_DIGIT.digit();
case 4 -> // I_AXES_DIGIT
Direction.IK_AXES_DIGIT.digit();
case 5 -> // IK_AXES_DIGIT
Direction.K_AXES_DIGIT.digit();
default -> digit;
};
}
/**
* Rotates indexing digit 60 degrees counter-clockwise. Returns result.
*
* @param digit Indexing digit (between 1 and 6 inclusive)
*/
public static int rotate60ccw(int digit) {
return switch (digit) {
case 1 -> // K_AXES_DIGIT
Direction.IK_AXES_DIGIT.digit();
case 5 -> // IK_AXES_DIGIT
Direction.I_AXES_DIGIT.digit();
case 4 -> // I_AXES_DIGIT
Direction.IJ_AXES_DIGIT.digit();
case 6 -> // IJ_AXES_DIGIT
Direction.J_AXES_DIGIT.digit();
case 2 -> // J_AXES_DIGIT:
Direction.JK_AXES_DIGIT.digit();
case 3 -> // JK_AXES_DIGIT:
Direction.K_AXES_DIGIT.digit();
default -> digit;
};
}
}
| elastic/elasticsearch | libs/h3/src/main/java/org/elasticsearch/h3/CoordIJK.java | 3,778 | /**
* Rotates ijk coordinates 60 degrees counter-clockwise.
*/ | block_comment | nl | /*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
* This project is based on a modification of https://github.com/uber/h3 which is licensed under the Apache 2.0 License.
*
* Copyright 2016-2018, 2020-2021 Uber Technologies, Inc.
*/
package org.elasticsearch.h3;
/**
* Mutable IJK hexagon coordinates
*
* Each axis is spaced 120 degrees apart.
*
* References two Vec2d cartesian coordinate systems:
*
* 1. gnomonic: face-centered polyhedral gnomonic projection space with
* traditional scaling and x-axes aligned with the face Class II
* i-axes.
*
* 2. hex2d: local face-centered coordinate system scaled a specific H3 grid
* resolution unit length and with x-axes aligned with the local
* i-axes
*/
final class CoordIJK {
/** CoordIJK unit vectors corresponding to the 7 H3 digits.
*/
private static final int[][] UNIT_VECS = {
{ 0, 0, 0 }, // direction 0
{ 0, 0, 1 }, // direction 1
{ 0, 1, 0 }, // direction 2
{ 0, 1, 1 }, // direction 3
{ 1, 0, 0 }, // direction 4
{ 1, 0, 1 }, // direction 5
{ 1, 1, 0 } // direction 6
};
/** H3 digit representing ijk+ axes direction.
* Values will be within the lowest 3 bits of an integer.
*/
public enum Direction {
CENTER_DIGIT(0),
K_AXES_DIGIT(1),
J_AXES_DIGIT(2),
JK_AXES_DIGIT(J_AXES_DIGIT.digit() | K_AXES_DIGIT.digit()),
I_AXES_DIGIT(4),
IK_AXES_DIGIT(I_AXES_DIGIT.digit() | K_AXES_DIGIT.digit()),
IJ_AXES_DIGIT(I_AXES_DIGIT.digit() | J_AXES_DIGIT.digit()),
INVALID_DIGIT(7),
NUM_DIGITS(INVALID_DIGIT.digit()),
PENTAGON_SKIPPED_DIGIT(K_AXES_DIGIT.digit());
Direction(int digit) {
this.digit = digit;
}
private final int digit;
public int digit() {
return digit;
}
}
int i; // i component
int j; // j component
int k; // k component
CoordIJK(int i, int j, int k) {
this.i = i;
this.j = j;
this.k = k;
}
/**
* Reset the value of the IJK coordinates to the provided ones.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
void reset(int i, int j, int k) {
this.i = i;
this.j = j;
this.k = k;
}
/**
* Find the center point in 2D cartesian coordinates of a hex.
*/
public Vec2d ijkToHex2d() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
return new Vec2d(i - 0.5 * j, j * Constants.M_SQRT3_2);
}
/**
* Find the center point in spherical coordinates of a hex on a particular icosahedral face.
*/
public LatLng ijkToGeo(int face, int res, boolean substrate) {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
return Vec2d.hex2dToGeo(i - 0.5 * j, j * Constants.M_SQRT3_2, face, res, substrate);
}
/**
* Add ijk coordinates.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
public void ijkAdd(int i, int j, int k) {
this.i = Math.addExact(this.i, i);
this.j = Math.addExact(this.j, j);
this.k = Math.addExact(this.k, k);
}
/**
* Subtract ijk coordinates.
*
* @param i the i coordinate
* @param j the j coordinate
* @param k the k coordinate
*/
public void ijkSub(int i, int j, int k) {
this.i = Math.subtractExact(this.i, i);
this.j = Math.subtractExact(this.j, j);
this.k = Math.subtractExact(this.k, k);
}
/**
* Normalizes ijk coordinates by setting the ijk coordinates
* to the smallest possible positive values.
*/
public void ijkNormalize() {
final int min = Math.min(i, Math.min(j, k));
ijkSub(min, min, min);
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 7 counter-clockwise resolution.
*/
public void downAp7() {
// res r unit vectors in res r+1
// iVec (3, 0, 1)
// jVec (1, 3, 0)
// kVec (0, 1, 3)
final int i = Math.addExact(Math.multiplyExact(this.i, 3), this.j);
final int j = Math.addExact(Math.multiplyExact(this.j, 3), this.k);
final int k = Math.addExact(Math.multiplyExact(this.k, 3), this.i);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 7 clockwise resolution.
*/
public void downAp7r() {
// iVec (3, 1, 0)
// jVec (0, 3, 1)
// kVec (1, 0, 3)
final int i = Math.addExact(Math.multiplyExact(this.i, 3), this.k);
final int j = Math.addExact(Math.multiplyExact(this.j, 3), this.i);
final int k = Math.addExact(Math.multiplyExact(this.k, 3), this.j);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 3 counter-clockwise resolution.
*/
public void downAp3() {
// res r unit vectors in res r+1
// iVec (2, 0, 1)
// jVec (1, 2, 0)
// kVec (0, 1, 2)
final int i = Math.addExact(Math.multiplyExact(this.i, 2), this.j);
final int j = Math.addExact(Math.multiplyExact(this.j, 2), this.k);
final int k = Math.addExact(Math.multiplyExact(this.k, 2), this.i);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex centered on the current
* hex at the next finer aperture 3 clockwise resolution.
*/
public void downAp3r() {
// res r unit vectors in res r+1
// iVec (2, 1, 0)
// jVec (0, 2, 1)
// kVec (1, 0, 2)
final int i = Math.addExact(Math.multiplyExact(this.i, 2), this.k);
final int j = Math.addExact(Math.multiplyExact(this.j, 2), this.i);
final int k = Math.addExact(Math.multiplyExact(this.k, 2), this.j);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Rotates ijk coordinates 60 degrees clockwise.
*
*/
public void ijkRotate60cw() {
// unit vector rotations
// iVec (1, 0, 1)
// jVec (1, 1, 0)
// kVec (0, 1, 1)
final int i = Math.addExact(this.i, this.j);
final int j = Math.addExact(this.j, this.k);
final int k = Math.addExact(this.i, this.k);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Rotates ijk coordinates<SUF>*/
public void ijkRotate60ccw() {
// unit vector rotations
// iVec (1, 1, 0)
// jVec (0, 1, 1)
// kVec (1, 0, 1)
final int i = Math.addExact(this.i, this.k);
final int j = Math.addExact(this.i, this.j);
final int k = Math.addExact(this.j, this.k);
this.i = i;
this.j = j;
this.k = k;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the hex in the specified digit
* direction from the current ijk coordinates.
* @param digit The digit direction from the original ijk coordinates.
*/
public void neighbor(int digit) {
if (digit > Direction.CENTER_DIGIT.digit() && digit < Direction.NUM_DIGITS.digit()) {
ijkAdd(UNIT_VECS[digit][0], UNIT_VECS[digit][1], UNIT_VECS[digit][2]);
ijkNormalize();
}
}
/**
* Find the normalized ijk coordinates of the indexing parent of a cell in a
* clockwise aperture 7 grid.
*/
public void upAp7r() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
this.i = (int) Math.round((Math.addExact(Math.multiplyExact(2, i), j)) / 7.0);
this.j = (int) Math.round((Math.subtractExact(Math.multiplyExact(3, j), i)) / 7.0);
this.k = 0;
ijkNormalize();
}
/**
* Find the normalized ijk coordinates of the indexing parent of a cell in a
* counter-clockwise aperture 7 grid.
*
*/
public void upAp7() {
final int i = Math.subtractExact(this.i, this.k);
final int j = Math.subtractExact(this.j, this.k);
this.i = (int) Math.round((Math.subtractExact(Math.multiplyExact(3, i), j)) / 7.0);
this.j = (int) Math.round((Math.addExact(Math.multiplyExact(2, j), i)) / 7.0);
this.k = 0;
ijkNormalize();
}
/**
* Determines the H3 digit corresponding to a unit vector in ijk coordinates.
*
* @return The H3 digit (0-6) corresponding to the ijk unit vector, or
* INVALID_DIGIT on failure.
*/
public int unitIjkToDigit() {
// should be call on a normalized object
if (Math.min(i, Math.min(j, k)) < 0 || Math.max(i, Math.max(j, k)) > 1) {
return Direction.INVALID_DIGIT.digit();
}
return i << 2 | j << 1 | k;
}
/**
* Rotates indexing digit 60 degrees clockwise. Returns result.
*
* @param digit Indexing digit (between 1 and 6 inclusive)
*/
public static int rotate60cw(int digit) {
return switch (digit) {
case 1 -> // K_AXES_DIGIT
Direction.JK_AXES_DIGIT.digit();
case 3 -> // JK_AXES_DIGIT:
Direction.J_AXES_DIGIT.digit();
case 2 -> // J_AXES_DIGIT:
Direction.IJ_AXES_DIGIT.digit();
case 6 -> // IJ_AXES_DIGIT
Direction.I_AXES_DIGIT.digit();
case 4 -> // I_AXES_DIGIT
Direction.IK_AXES_DIGIT.digit();
case 5 -> // IK_AXES_DIGIT
Direction.K_AXES_DIGIT.digit();
default -> digit;
};
}
/**
* Rotates indexing digit 60 degrees counter-clockwise. Returns result.
*
* @param digit Indexing digit (between 1 and 6 inclusive)
*/
public static int rotate60ccw(int digit) {
return switch (digit) {
case 1 -> // K_AXES_DIGIT
Direction.IK_AXES_DIGIT.digit();
case 5 -> // IK_AXES_DIGIT
Direction.I_AXES_DIGIT.digit();
case 4 -> // I_AXES_DIGIT
Direction.IJ_AXES_DIGIT.digit();
case 6 -> // IJ_AXES_DIGIT
Direction.J_AXES_DIGIT.digit();
case 2 -> // J_AXES_DIGIT:
Direction.JK_AXES_DIGIT.digit();
case 3 -> // JK_AXES_DIGIT:
Direction.K_AXES_DIGIT.digit();
default -> digit;
};
}
}
|
28_45 | /*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.handler.ssl;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.UnpooledByteBufAllocator;
import io.netty.internal.tcnative.Buffer;
import io.netty.internal.tcnative.Library;
import io.netty.internal.tcnative.SSL;
import io.netty.internal.tcnative.SSLContext;
import io.netty.util.CharsetUtil;
import io.netty.util.ReferenceCountUtil;
import io.netty.util.ReferenceCounted;
import io.netty.util.internal.EmptyArrays;
import io.netty.util.internal.NativeLibraryLoader;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.StringUtil;
import io.netty.util.internal.SystemPropertyUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.io.ByteArrayInputStream;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import static io.netty.handler.ssl.SslUtils.*;
/**
* Tells if <a href="https://netty.io/wiki/forked-tomcat-native.html">{@code netty-tcnative}</a> and its OpenSSL support
* are available.
*/
public final class OpenSsl {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(OpenSsl.class);
private static final Throwable UNAVAILABILITY_CAUSE;
static final List<String> DEFAULT_CIPHERS;
static final Set<String> AVAILABLE_CIPHER_SUITES;
private static final Set<String> AVAILABLE_OPENSSL_CIPHER_SUITES;
private static final Set<String> AVAILABLE_JAVA_CIPHER_SUITES;
private static final boolean SUPPORTS_KEYMANAGER_FACTORY;
private static final boolean USE_KEYMANAGER_FACTORY;
private static final boolean SUPPORTS_OCSP;
private static final boolean TLSV13_SUPPORTED;
private static final boolean IS_BORINGSSL;
private static final Set<String> CLIENT_DEFAULT_PROTOCOLS;
private static final Set<String> SERVER_DEFAULT_PROTOCOLS;
static final Set<String> SUPPORTED_PROTOCOLS_SET;
static final String[] EXTRA_SUPPORTED_TLS_1_3_CIPHERS;
static final String EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING;
static final String[] NAMED_GROUPS;
static final boolean JAVAX_CERTIFICATE_CREATION_SUPPORTED;
// Use default that is supported in java 11 and earlier and also in OpenSSL / BoringSSL.
// See https://github.com/netty/netty-tcnative/issues/567
// See https://www.java.com/en/configure_crypto.html for ordering
private static final String[] DEFAULT_NAMED_GROUPS = { "x25519", "secp256r1", "secp384r1", "secp521r1" };
static {
Throwable cause = null;
if (SystemPropertyUtil.getBoolean("io.netty.handler.ssl.noOpenSsl", false)) {
cause = new UnsupportedOperationException(
"OpenSSL was explicit disabled with -Dio.netty.handler.ssl.noOpenSsl=true");
logger.debug(
"netty-tcnative explicit disabled; " +
OpenSslEngine.class.getSimpleName() + " will be unavailable.", cause);
} else {
// Test if netty-tcnative is in the classpath first.
try {
Class.forName("io.netty.internal.tcnative.SSLContext", false,
PlatformDependent.getClassLoader(OpenSsl.class));
} catch (ClassNotFoundException t) {
cause = t;
logger.debug(
"netty-tcnative not in the classpath; " +
OpenSslEngine.class.getSimpleName() + " will be unavailable.");
}
// If in the classpath, try to load the native library and initialize netty-tcnative.
if (cause == null) {
try {
// The JNI library was not already loaded. Load it now.
loadTcNative();
} catch (Throwable t) {
cause = t;
logger.debug(
"Failed to load netty-tcnative; " +
OpenSslEngine.class.getSimpleName() + " will be unavailable, unless the " +
"application has already loaded the symbols by some other means. " +
"See https://netty.io/wiki/forked-tomcat-native.html for more information.", t);
}
try {
String engine = SystemPropertyUtil.get("io.netty.handler.ssl.openssl.engine", null);
if (engine == null) {
logger.debug("Initialize netty-tcnative using engine: 'default'");
} else {
logger.debug("Initialize netty-tcnative using engine: '{}'", engine);
}
initializeTcNative(engine);
// The library was initialized successfully. If loading the library failed above,
// reset the cause now since it appears that the library was loaded by some other
// means.
cause = null;
} catch (Throwable t) {
if (cause == null) {
cause = t;
}
logger.debug(
"Failed to initialize netty-tcnative; " +
OpenSslEngine.class.getSimpleName() + " will be unavailable. " +
"See https://netty.io/wiki/forked-tomcat-native.html for more information.", t);
}
}
}
UNAVAILABILITY_CAUSE = cause;
CLIENT_DEFAULT_PROTOCOLS = defaultProtocols("jdk.tls.client.protocols");
SERVER_DEFAULT_PROTOCOLS = defaultProtocols("jdk.tls.server.protocols");
if (cause == null) {
logger.debug("netty-tcnative using native library: {}", SSL.versionString());
final List<String> defaultCiphers = new ArrayList<String>();
final Set<String> availableOpenSslCipherSuites = new LinkedHashSet<String>(128);
boolean supportsKeyManagerFactory = false;
boolean useKeyManagerFactory = false;
boolean tlsv13Supported = false;
String[] namedGroups = DEFAULT_NAMED_GROUPS;
String[] defaultConvertedNamedGroups = new String[namedGroups.length];
for (int i = 0; i < namedGroups.length; i++) {
defaultConvertedNamedGroups[i] = GroupsConverter.toOpenSsl(namedGroups[i]);
}
IS_BORINGSSL = "BoringSSL".equals(versionString());
if (IS_BORINGSSL) {
EXTRA_SUPPORTED_TLS_1_3_CIPHERS = new String [] { "TLS_AES_128_GCM_SHA256",
"TLS_AES_256_GCM_SHA384" ,
"TLS_CHACHA20_POLY1305_SHA256" };
StringBuilder ciphersBuilder = new StringBuilder(128);
for (String cipher: EXTRA_SUPPORTED_TLS_1_3_CIPHERS) {
ciphersBuilder.append(cipher).append(":");
}
ciphersBuilder.setLength(ciphersBuilder.length() - 1);
EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING = ciphersBuilder.toString();
} else {
EXTRA_SUPPORTED_TLS_1_3_CIPHERS = EmptyArrays.EMPTY_STRINGS;
EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING = StringUtil.EMPTY_STRING;
}
try {
final long sslCtx = SSLContext.make(SSL.SSL_PROTOCOL_ALL, SSL.SSL_MODE_SERVER);
long certBio = 0;
long keyBio = 0;
long cert = 0;
long key = 0;
try {
// As we delegate to the KeyManager / TrustManager of the JDK we need to ensure it can actually
// handle TLSv13 as otherwise we may see runtime exceptions
if (SslProvider.isTlsv13Supported(SslProvider.JDK)) {
try {
StringBuilder tlsv13Ciphers = new StringBuilder();
for (String cipher : TLSV13_CIPHERS) {
String converted = CipherSuiteConverter.toOpenSsl(cipher, IS_BORINGSSL);
if (converted != null) {
tlsv13Ciphers.append(converted).append(':');
}
}
if (tlsv13Ciphers.length() == 0) {
tlsv13Supported = false;
} else {
tlsv13Ciphers.setLength(tlsv13Ciphers.length() - 1);
SSLContext.setCipherSuite(sslCtx, tlsv13Ciphers.toString(), true);
tlsv13Supported = true;
}
} catch (Exception ignore) {
tlsv13Supported = false;
}
}
SSLContext.setCipherSuite(sslCtx, "ALL", false);
final long ssl = SSL.newSSL(sslCtx, true);
try {
for (String c: SSL.getCiphers(ssl)) {
// Filter out bad input.
if (c == null || c.isEmpty() || availableOpenSslCipherSuites.contains(c) ||
// Filter out TLSv1.3 ciphers if not supported.
!tlsv13Supported && isTLSv13Cipher(c)) {
continue;
}
availableOpenSslCipherSuites.add(c);
}
if (IS_BORINGSSL) {
// Currently BoringSSL does not include these when calling SSL.getCiphers() even when these
// are supported.
Collections.addAll(availableOpenSslCipherSuites, EXTRA_SUPPORTED_TLS_1_3_CIPHERS);
Collections.addAll(availableOpenSslCipherSuites,
"AEAD-AES128-GCM-SHA256",
"AEAD-AES256-GCM-SHA384",
"AEAD-CHACHA20-POLY1305-SHA256");
}
PemEncoded privateKey = PemPrivateKey.valueOf(PROBING_KEY.getBytes(CharsetUtil.US_ASCII));
try {
// Let's check if we can set a callback, which may not work if the used OpenSSL version
// is to old.
SSLContext.setCertificateCallback(sslCtx, null);
X509Certificate certificate = selfSignedCertificate();
certBio = ReferenceCountedOpenSslContext.toBIO(ByteBufAllocator.DEFAULT, certificate);
cert = SSL.parseX509Chain(certBio);
keyBio = ReferenceCountedOpenSslContext.toBIO(
UnpooledByteBufAllocator.DEFAULT, privateKey.retain());
key = SSL.parsePrivateKey(keyBio, null);
SSL.setKeyMaterial(ssl, cert, key);
supportsKeyManagerFactory = true;
try {
boolean propertySet = SystemPropertyUtil.contains(
"io.netty.handler.ssl.openssl.useKeyManagerFactory");
if (!IS_BORINGSSL) {
useKeyManagerFactory = SystemPropertyUtil.getBoolean(
"io.netty.handler.ssl.openssl.useKeyManagerFactory", true);
if (propertySet) {
logger.info("System property " +
"'io.netty.handler.ssl.openssl.useKeyManagerFactory'" +
" is deprecated and so will be ignored in the future");
}
} else {
useKeyManagerFactory = true;
if (propertySet) {
logger.info("System property " +
"'io.netty.handler.ssl.openssl.useKeyManagerFactory'" +
" is deprecated and will be ignored when using BoringSSL");
}
}
} catch (Throwable ignore) {
logger.debug("Failed to get useKeyManagerFactory system property.");
}
} catch (Error ignore) {
logger.debug("KeyManagerFactory not supported.");
} finally {
privateKey.release();
}
} finally {
SSL.freeSSL(ssl);
if (certBio != 0) {
SSL.freeBIO(certBio);
}
if (keyBio != 0) {
SSL.freeBIO(keyBio);
}
if (cert != 0) {
SSL.freeX509Chain(cert);
}
if (key != 0) {
SSL.freePrivateKey(key);
}
}
String groups = SystemPropertyUtil.get("jdk.tls.namedGroups", null);
if (groups != null) {
String[] nGroups = groups.split(",");
Set<String> supportedNamedGroups = new LinkedHashSet<String>(nGroups.length);
Set<String> supportedConvertedNamedGroups = new LinkedHashSet<String>(nGroups.length);
Set<String> unsupportedNamedGroups = new LinkedHashSet<String>();
for (String namedGroup : nGroups) {
String converted = GroupsConverter.toOpenSsl(namedGroup);
if (SSLContext.setCurvesList(sslCtx, converted)) {
supportedConvertedNamedGroups.add(converted);
supportedNamedGroups.add(namedGroup);
} else {
unsupportedNamedGroups.add(namedGroup);
}
}
if (supportedNamedGroups.isEmpty()) {
namedGroups = defaultConvertedNamedGroups;
logger.info("All configured namedGroups are not supported: {}. Use default: {}.",
Arrays.toString(unsupportedNamedGroups.toArray(EmptyArrays.EMPTY_STRINGS)),
Arrays.toString(DEFAULT_NAMED_GROUPS));
} else {
String[] groupArray = supportedNamedGroups.toArray(EmptyArrays.EMPTY_STRINGS);
if (unsupportedNamedGroups.isEmpty()) {
logger.info("Using configured namedGroups -D 'jdk.tls.namedGroup': {} ",
Arrays.toString(groupArray));
} else {
logger.info("Using supported configured namedGroups: {}. Unsupported namedGroups: {}. ",
Arrays.toString(groupArray),
Arrays.toString(unsupportedNamedGroups.toArray(EmptyArrays.EMPTY_STRINGS)));
}
namedGroups = supportedConvertedNamedGroups.toArray(EmptyArrays.EMPTY_STRINGS);
}
} else {
namedGroups = defaultConvertedNamedGroups;
}
} finally {
SSLContext.free(sslCtx);
}
} catch (Exception e) {
logger.warn("Failed to get the list of available OpenSSL cipher suites.", e);
}
NAMED_GROUPS = namedGroups;
AVAILABLE_OPENSSL_CIPHER_SUITES = Collections.unmodifiableSet(availableOpenSslCipherSuites);
final Set<String> availableJavaCipherSuites = new LinkedHashSet<String>(
AVAILABLE_OPENSSL_CIPHER_SUITES.size() * 2);
for (String cipher: AVAILABLE_OPENSSL_CIPHER_SUITES) {
// Included converted but also openssl cipher name
if (!isTLSv13Cipher(cipher)) {
availableJavaCipherSuites.add(CipherSuiteConverter.toJava(cipher, "TLS"));
availableJavaCipherSuites.add(CipherSuiteConverter.toJava(cipher, "SSL"));
} else {
// TLSv1.3 ciphers have the correct format.
availableJavaCipherSuites.add(cipher);
}
}
addIfSupported(availableJavaCipherSuites, defaultCiphers, DEFAULT_CIPHER_SUITES);
addIfSupported(availableJavaCipherSuites, defaultCiphers, TLSV13_CIPHER_SUITES);
// Also handle the extra supported ciphers as these will contain some more stuff on BoringSSL.
addIfSupported(availableJavaCipherSuites, defaultCiphers, EXTRA_SUPPORTED_TLS_1_3_CIPHERS);
useFallbackCiphersIfDefaultIsEmpty(defaultCiphers, availableJavaCipherSuites);
DEFAULT_CIPHERS = Collections.unmodifiableList(defaultCiphers);
AVAILABLE_JAVA_CIPHER_SUITES = Collections.unmodifiableSet(availableJavaCipherSuites);
final Set<String> availableCipherSuites = new LinkedHashSet<String>(
AVAILABLE_OPENSSL_CIPHER_SUITES.size() + AVAILABLE_JAVA_CIPHER_SUITES.size());
availableCipherSuites.addAll(AVAILABLE_OPENSSL_CIPHER_SUITES);
availableCipherSuites.addAll(AVAILABLE_JAVA_CIPHER_SUITES);
AVAILABLE_CIPHER_SUITES = availableCipherSuites;
SUPPORTS_KEYMANAGER_FACTORY = supportsKeyManagerFactory;
USE_KEYMANAGER_FACTORY = useKeyManagerFactory;
Set<String> protocols = new LinkedHashSet<String>(6);
// Seems like there is no way to explicitly disable SSLv2Hello in openssl so it is always enabled
protocols.add(SslProtocols.SSL_v2_HELLO);
if (doesSupportProtocol(SSL.SSL_PROTOCOL_SSLV2, SSL.SSL_OP_NO_SSLv2)) {
protocols.add(SslProtocols.SSL_v2);
}
if (doesSupportProtocol(SSL.SSL_PROTOCOL_SSLV3, SSL.SSL_OP_NO_SSLv3)) {
protocols.add(SslProtocols.SSL_v3);
}
if (doesSupportProtocol(SSL.SSL_PROTOCOL_TLSV1, SSL.SSL_OP_NO_TLSv1)) {
protocols.add(SslProtocols.TLS_v1);
}
if (doesSupportProtocol(SSL.SSL_PROTOCOL_TLSV1_1, SSL.SSL_OP_NO_TLSv1_1)) {
protocols.add(SslProtocols.TLS_v1_1);
}
if (doesSupportProtocol(SSL.SSL_PROTOCOL_TLSV1_2, SSL.SSL_OP_NO_TLSv1_2)) {
protocols.add(SslProtocols.TLS_v1_2);
}
// This is only supported by java8u272 and later.
if (tlsv13Supported && doesSupportProtocol(SSL.SSL_PROTOCOL_TLSV1_3, SSL.SSL_OP_NO_TLSv1_3)) {
protocols.add(SslProtocols.TLS_v1_3);
TLSV13_SUPPORTED = true;
} else {
TLSV13_SUPPORTED = false;
}
SUPPORTED_PROTOCOLS_SET = Collections.unmodifiableSet(protocols);
SUPPORTS_OCSP = doesSupportOcsp();
if (logger.isDebugEnabled()) {
logger.debug("Supported protocols (OpenSSL): {} ", SUPPORTED_PROTOCOLS_SET);
logger.debug("Default cipher suites (OpenSSL): {}", DEFAULT_CIPHERS);
}
// Check if we can create a javax.security.cert.X509Certificate from our cert. This might fail on
// JDK17 and above. In this case we will later throw an UnsupportedOperationException if someone
// tries to access these via SSLSession. See https://github.com/netty/netty/issues/13560.
boolean javaxCertificateCreationSupported;
try {
javax.security.cert.X509Certificate.getInstance(PROBING_CERT.getBytes(CharsetUtil.US_ASCII));
javaxCertificateCreationSupported = true;
} catch (javax.security.cert.CertificateException ex) {
javaxCertificateCreationSupported = false;
}
JAVAX_CERTIFICATE_CREATION_SUPPORTED = javaxCertificateCreationSupported;
} else {
DEFAULT_CIPHERS = Collections.emptyList();
AVAILABLE_OPENSSL_CIPHER_SUITES = Collections.emptySet();
AVAILABLE_JAVA_CIPHER_SUITES = Collections.emptySet();
AVAILABLE_CIPHER_SUITES = Collections.emptySet();
SUPPORTS_KEYMANAGER_FACTORY = false;
USE_KEYMANAGER_FACTORY = false;
SUPPORTED_PROTOCOLS_SET = Collections.emptySet();
SUPPORTS_OCSP = false;
TLSV13_SUPPORTED = false;
IS_BORINGSSL = false;
EXTRA_SUPPORTED_TLS_1_3_CIPHERS = EmptyArrays.EMPTY_STRINGS;
EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING = StringUtil.EMPTY_STRING;
NAMED_GROUPS = DEFAULT_NAMED_GROUPS;
JAVAX_CERTIFICATE_CREATION_SUPPORTED = false;
}
}
static String checkTls13Ciphers(InternalLogger logger, String ciphers) {
if (IS_BORINGSSL && !ciphers.isEmpty()) {
assert EXTRA_SUPPORTED_TLS_1_3_CIPHERS.length > 0;
Set<String> boringsslTlsv13Ciphers = new HashSet<String>(EXTRA_SUPPORTED_TLS_1_3_CIPHERS.length);
Collections.addAll(boringsslTlsv13Ciphers, EXTRA_SUPPORTED_TLS_1_3_CIPHERS);
boolean ciphersNotMatch = false;
for (String cipher: ciphers.split(":")) {
if (boringsslTlsv13Ciphers.isEmpty()) {
ciphersNotMatch = true;
break;
}
if (!boringsslTlsv13Ciphers.remove(cipher) &&
!boringsslTlsv13Ciphers.remove(CipherSuiteConverter.toJava(cipher, "TLS"))) {
ciphersNotMatch = true;
break;
}
}
// Also check if there are ciphers left.
ciphersNotMatch |= !boringsslTlsv13Ciphers.isEmpty();
if (ciphersNotMatch) {
if (logger.isInfoEnabled()) {
StringBuilder javaCiphers = new StringBuilder(128);
for (String cipher : ciphers.split(":")) {
javaCiphers.append(CipherSuiteConverter.toJava(cipher, "TLS")).append(":");
}
javaCiphers.setLength(javaCiphers.length() - 1);
logger.info(
"BoringSSL doesn't allow to enable or disable TLSv1.3 ciphers explicitly." +
" Provided TLSv1.3 ciphers: '{}', default TLSv1.3 ciphers that will be used: '{}'.",
javaCiphers, EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING);
}
return EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING;
}
}
return ciphers;
}
static boolean isSessionCacheSupported() {
return version() >= 0x10100000L;
}
/**
* Returns a self-signed {@link X509Certificate} for {@code netty.io}.
*/
static X509Certificate selfSignedCertificate() throws CertificateException {
return (X509Certificate) SslContext.X509_CERT_FACTORY.generateCertificate(
new ByteArrayInputStream(PROBING_CERT.getBytes(CharsetUtil.US_ASCII))
);
}
private static boolean doesSupportOcsp() {
boolean supportsOcsp = false;
if (version() >= 0x10002000L) {
long sslCtx = -1;
try {
sslCtx = SSLContext.make(SSL.SSL_PROTOCOL_TLSV1_2, SSL.SSL_MODE_SERVER);
SSLContext.enableOcsp(sslCtx, false);
supportsOcsp = true;
} catch (Exception ignore) {
// ignore
} finally {
if (sslCtx != -1) {
SSLContext.free(sslCtx);
}
}
}
return supportsOcsp;
}
private static boolean doesSupportProtocol(int protocol, int opt) {
if (opt == 0) {
// If the opt is 0 the protocol is not supported. This is for example the case with BoringSSL and SSLv2.
return false;
}
long sslCtx = -1;
try {
sslCtx = SSLContext.make(protocol, SSL.SSL_MODE_COMBINED);
return true;
} catch (Exception ignore) {
return false;
} finally {
if (sslCtx != -1) {
SSLContext.free(sslCtx);
}
}
}
/**
* Returns {@code true} if and only if
* <a href="https://netty.io/wiki/forked-tomcat-native.html">{@code netty-tcnative}</a> and its OpenSSL support
* are available.
*/
public static boolean isAvailable() {
return UNAVAILABILITY_CAUSE == null;
}
/**
* Returns {@code true} if the used version of openssl supports
* <a href="https://tools.ietf.org/html/rfc7301">ALPN</a>.
*
* @deprecated use {@link SslProvider#isAlpnSupported(SslProvider)} with {@link SslProvider#OPENSSL}.
*/
@Deprecated
public static boolean isAlpnSupported() {
return version() >= 0x10002000L;
}
/**
* Returns {@code true} if the used version of OpenSSL supports OCSP stapling.
*/
public static boolean isOcspSupported() {
return SUPPORTS_OCSP;
}
/**
* Returns the version of the used available OpenSSL library or {@code -1} if {@link #isAvailable()}
* returns {@code false}.
*/
public static int version() {
return isAvailable() ? SSL.version() : -1;
}
/**
* Returns the version string of the used available OpenSSL library or {@code null} if {@link #isAvailable()}
* returns {@code false}.
*/
public static String versionString() {
return isAvailable() ? SSL.versionString() : null;
}
/**
* Ensure that <a href="https://netty.io/wiki/forked-tomcat-native.html">{@code netty-tcnative}</a> and
* its OpenSSL support are available.
*
* @throws UnsatisfiedLinkError if unavailable
*/
public static void ensureAvailability() {
if (UNAVAILABILITY_CAUSE != null) {
throw (Error) new UnsatisfiedLinkError(
"failed to load the required native library").initCause(UNAVAILABILITY_CAUSE);
}
}
/**
* Returns the cause of unavailability of
* <a href="https://netty.io/wiki/forked-tomcat-native.html">{@code netty-tcnative}</a> and its OpenSSL support.
*
* @return the cause if unavailable. {@code null} if available.
*/
public static Throwable unavailabilityCause() {
return UNAVAILABILITY_CAUSE;
}
/**
* @deprecated use {@link #availableOpenSslCipherSuites()}
*/
@Deprecated
public static Set<String> availableCipherSuites() {
return availableOpenSslCipherSuites();
}
/**
* Returns all the available OpenSSL cipher suites.
* Please note that the returned array may include the cipher suites that are insecure or non-functional.
*/
public static Set<String> availableOpenSslCipherSuites() {
return AVAILABLE_OPENSSL_CIPHER_SUITES;
}
/**
* Returns all the available cipher suites (Java-style).
* Please note that the returned array may include the cipher suites that are insecure or non-functional.
*/
public static Set<String> availableJavaCipherSuites() {
return AVAILABLE_JAVA_CIPHER_SUITES;
}
/**
* Returns {@code true} if and only if the specified cipher suite is available in OpenSSL.
* Both Java-style cipher suite and OpenSSL-style cipher suite are accepted.
*/
public static boolean isCipherSuiteAvailable(String cipherSuite) {
String converted = CipherSuiteConverter.toOpenSsl(cipherSuite, IS_BORINGSSL);
if (converted != null) {
cipherSuite = converted;
}
return AVAILABLE_OPENSSL_CIPHER_SUITES.contains(cipherSuite);
}
/**
* Returns {@code true} if {@link javax.net.ssl.KeyManagerFactory} is supported when using OpenSSL.
*/
public static boolean supportsKeyManagerFactory() {
return SUPPORTS_KEYMANAGER_FACTORY;
}
/**
* Always returns {@code true} if {@link #isAvailable()} returns {@code true}.
*
* @deprecated Will be removed because hostname validation is always done by a
* {@link javax.net.ssl.TrustManager} implementation.
*/
@Deprecated
public static boolean supportsHostnameValidation() {
return isAvailable();
}
static boolean useKeyManagerFactory() {
return USE_KEYMANAGER_FACTORY;
}
static long memoryAddress(ByteBuf buf) {
assert buf.isDirect();
return buf.hasMemoryAddress() ? buf.memoryAddress() :
// Use internalNioBuffer to reduce object creation.
Buffer.address(buf.internalNioBuffer(0, buf.readableBytes()));
}
private OpenSsl() { }
private static void loadTcNative() throws Exception {
String os = PlatformDependent.normalizedOs();
String arch = PlatformDependent.normalizedArch();
Set<String> libNames = new LinkedHashSet<String>(5);
String staticLibName = "netty_tcnative";
// First, try loading the platform-specific library. Platform-specific
// libraries will be available if using a tcnative uber jar.
if ("linux".equals(os)) {
Set<String> classifiers = PlatformDependent.normalizedLinuxClassifiers();
for (String classifier : classifiers) {
libNames.add(staticLibName + "_" + os + '_' + arch + "_" + classifier);
}
// generic arch-dependent library
libNames.add(staticLibName + "_" + os + '_' + arch);
// Fedora SSL lib so naming (libssl.so.10 vs libssl.so.1.0.0).
// note: should already be included from the classifiers but if not, we use this as an
// additional fallback option here
libNames.add(staticLibName + "_" + os + '_' + arch + "_fedora");
} else {
libNames.add(staticLibName + "_" + os + '_' + arch);
}
libNames.add(staticLibName + "_" + arch);
libNames.add(staticLibName);
NativeLibraryLoader.loadFirstAvailable(PlatformDependent.getClassLoader(SSLContext.class),
libNames.toArray(EmptyArrays.EMPTY_STRINGS));
}
private static boolean initializeTcNative(String engine) throws Exception {
return Library.initialize("provided", engine);
}
static void releaseIfNeeded(ReferenceCounted counted) {
if (counted.refCnt() > 0) {
ReferenceCountUtil.safeRelease(counted);
}
}
static boolean isTlsv13Supported() {
return TLSV13_SUPPORTED;
}
static boolean isOptionSupported(SslContextOption<?> option) {
if (isAvailable()) {
if (option == OpenSslContextOption.USE_TASKS) {
return true;
}
// Check for options that are only supported by BoringSSL atm.
if (isBoringSSL()) {
return option == OpenSslContextOption.ASYNC_PRIVATE_KEY_METHOD ||
option == OpenSslContextOption.PRIVATE_KEY_METHOD ||
option == OpenSslContextOption.CERTIFICATE_COMPRESSION_ALGORITHMS ||
option == OpenSslContextOption.TLS_FALSE_START ||
option == OpenSslContextOption.MAX_CERTIFICATE_LIST_BYTES;
}
}
return false;
}
private static Set<String> defaultProtocols(String property) {
String protocolsString = SystemPropertyUtil.get(property, null);
Set<String> protocols = new HashSet<String>();
if (protocolsString != null) {
for (String proto : protocolsString.split(",")) {
String p = proto.trim();
protocols.add(p);
}
} else {
protocols.add(SslProtocols.TLS_v1_2);
protocols.add(SslProtocols.TLS_v1_3);
}
return protocols;
}
static String[] defaultProtocols(boolean isClient) {
final Collection<String> defaultProtocols = isClient ? CLIENT_DEFAULT_PROTOCOLS : SERVER_DEFAULT_PROTOCOLS;
assert defaultProtocols != null;
List<String> protocols = new ArrayList<String>(defaultProtocols.size());
for (String proto : defaultProtocols) {
if (SUPPORTED_PROTOCOLS_SET.contains(proto)) {
protocols.add(proto);
}
}
return protocols.toArray(EmptyArrays.EMPTY_STRINGS);
}
static boolean isBoringSSL() {
return IS_BORINGSSL;
}
}
| netty/netty | handler/src/main/java/io/netty/handler/ssl/OpenSsl.java | 8,169 | // generic arch-dependent library | line_comment | nl | /*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.handler.ssl;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.UnpooledByteBufAllocator;
import io.netty.internal.tcnative.Buffer;
import io.netty.internal.tcnative.Library;
import io.netty.internal.tcnative.SSL;
import io.netty.internal.tcnative.SSLContext;
import io.netty.util.CharsetUtil;
import io.netty.util.ReferenceCountUtil;
import io.netty.util.ReferenceCounted;
import io.netty.util.internal.EmptyArrays;
import io.netty.util.internal.NativeLibraryLoader;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.StringUtil;
import io.netty.util.internal.SystemPropertyUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.io.ByteArrayInputStream;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import static io.netty.handler.ssl.SslUtils.*;
/**
* Tells if <a href="https://netty.io/wiki/forked-tomcat-native.html">{@code netty-tcnative}</a> and its OpenSSL support
* are available.
*/
public final class OpenSsl {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(OpenSsl.class);
private static final Throwable UNAVAILABILITY_CAUSE;
static final List<String> DEFAULT_CIPHERS;
static final Set<String> AVAILABLE_CIPHER_SUITES;
private static final Set<String> AVAILABLE_OPENSSL_CIPHER_SUITES;
private static final Set<String> AVAILABLE_JAVA_CIPHER_SUITES;
private static final boolean SUPPORTS_KEYMANAGER_FACTORY;
private static final boolean USE_KEYMANAGER_FACTORY;
private static final boolean SUPPORTS_OCSP;
private static final boolean TLSV13_SUPPORTED;
private static final boolean IS_BORINGSSL;
private static final Set<String> CLIENT_DEFAULT_PROTOCOLS;
private static final Set<String> SERVER_DEFAULT_PROTOCOLS;
static final Set<String> SUPPORTED_PROTOCOLS_SET;
static final String[] EXTRA_SUPPORTED_TLS_1_3_CIPHERS;
static final String EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING;
static final String[] NAMED_GROUPS;
static final boolean JAVAX_CERTIFICATE_CREATION_SUPPORTED;
// Use default that is supported in java 11 and earlier and also in OpenSSL / BoringSSL.
// See https://github.com/netty/netty-tcnative/issues/567
// See https://www.java.com/en/configure_crypto.html for ordering
private static final String[] DEFAULT_NAMED_GROUPS = { "x25519", "secp256r1", "secp384r1", "secp521r1" };
static {
Throwable cause = null;
if (SystemPropertyUtil.getBoolean("io.netty.handler.ssl.noOpenSsl", false)) {
cause = new UnsupportedOperationException(
"OpenSSL was explicit disabled with -Dio.netty.handler.ssl.noOpenSsl=true");
logger.debug(
"netty-tcnative explicit disabled; " +
OpenSslEngine.class.getSimpleName() + " will be unavailable.", cause);
} else {
// Test if netty-tcnative is in the classpath first.
try {
Class.forName("io.netty.internal.tcnative.SSLContext", false,
PlatformDependent.getClassLoader(OpenSsl.class));
} catch (ClassNotFoundException t) {
cause = t;
logger.debug(
"netty-tcnative not in the classpath; " +
OpenSslEngine.class.getSimpleName() + " will be unavailable.");
}
// If in the classpath, try to load the native library and initialize netty-tcnative.
if (cause == null) {
try {
// The JNI library was not already loaded. Load it now.
loadTcNative();
} catch (Throwable t) {
cause = t;
logger.debug(
"Failed to load netty-tcnative; " +
OpenSslEngine.class.getSimpleName() + " will be unavailable, unless the " +
"application has already loaded the symbols by some other means. " +
"See https://netty.io/wiki/forked-tomcat-native.html for more information.", t);
}
try {
String engine = SystemPropertyUtil.get("io.netty.handler.ssl.openssl.engine", null);
if (engine == null) {
logger.debug("Initialize netty-tcnative using engine: 'default'");
} else {
logger.debug("Initialize netty-tcnative using engine: '{}'", engine);
}
initializeTcNative(engine);
// The library was initialized successfully. If loading the library failed above,
// reset the cause now since it appears that the library was loaded by some other
// means.
cause = null;
} catch (Throwable t) {
if (cause == null) {
cause = t;
}
logger.debug(
"Failed to initialize netty-tcnative; " +
OpenSslEngine.class.getSimpleName() + " will be unavailable. " +
"See https://netty.io/wiki/forked-tomcat-native.html for more information.", t);
}
}
}
UNAVAILABILITY_CAUSE = cause;
CLIENT_DEFAULT_PROTOCOLS = defaultProtocols("jdk.tls.client.protocols");
SERVER_DEFAULT_PROTOCOLS = defaultProtocols("jdk.tls.server.protocols");
if (cause == null) {
logger.debug("netty-tcnative using native library: {}", SSL.versionString());
final List<String> defaultCiphers = new ArrayList<String>();
final Set<String> availableOpenSslCipherSuites = new LinkedHashSet<String>(128);
boolean supportsKeyManagerFactory = false;
boolean useKeyManagerFactory = false;
boolean tlsv13Supported = false;
String[] namedGroups = DEFAULT_NAMED_GROUPS;
String[] defaultConvertedNamedGroups = new String[namedGroups.length];
for (int i = 0; i < namedGroups.length; i++) {
defaultConvertedNamedGroups[i] = GroupsConverter.toOpenSsl(namedGroups[i]);
}
IS_BORINGSSL = "BoringSSL".equals(versionString());
if (IS_BORINGSSL) {
EXTRA_SUPPORTED_TLS_1_3_CIPHERS = new String [] { "TLS_AES_128_GCM_SHA256",
"TLS_AES_256_GCM_SHA384" ,
"TLS_CHACHA20_POLY1305_SHA256" };
StringBuilder ciphersBuilder = new StringBuilder(128);
for (String cipher: EXTRA_SUPPORTED_TLS_1_3_CIPHERS) {
ciphersBuilder.append(cipher).append(":");
}
ciphersBuilder.setLength(ciphersBuilder.length() - 1);
EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING = ciphersBuilder.toString();
} else {
EXTRA_SUPPORTED_TLS_1_3_CIPHERS = EmptyArrays.EMPTY_STRINGS;
EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING = StringUtil.EMPTY_STRING;
}
try {
final long sslCtx = SSLContext.make(SSL.SSL_PROTOCOL_ALL, SSL.SSL_MODE_SERVER);
long certBio = 0;
long keyBio = 0;
long cert = 0;
long key = 0;
try {
// As we delegate to the KeyManager / TrustManager of the JDK we need to ensure it can actually
// handle TLSv13 as otherwise we may see runtime exceptions
if (SslProvider.isTlsv13Supported(SslProvider.JDK)) {
try {
StringBuilder tlsv13Ciphers = new StringBuilder();
for (String cipher : TLSV13_CIPHERS) {
String converted = CipherSuiteConverter.toOpenSsl(cipher, IS_BORINGSSL);
if (converted != null) {
tlsv13Ciphers.append(converted).append(':');
}
}
if (tlsv13Ciphers.length() == 0) {
tlsv13Supported = false;
} else {
tlsv13Ciphers.setLength(tlsv13Ciphers.length() - 1);
SSLContext.setCipherSuite(sslCtx, tlsv13Ciphers.toString(), true);
tlsv13Supported = true;
}
} catch (Exception ignore) {
tlsv13Supported = false;
}
}
SSLContext.setCipherSuite(sslCtx, "ALL", false);
final long ssl = SSL.newSSL(sslCtx, true);
try {
for (String c: SSL.getCiphers(ssl)) {
// Filter out bad input.
if (c == null || c.isEmpty() || availableOpenSslCipherSuites.contains(c) ||
// Filter out TLSv1.3 ciphers if not supported.
!tlsv13Supported && isTLSv13Cipher(c)) {
continue;
}
availableOpenSslCipherSuites.add(c);
}
if (IS_BORINGSSL) {
// Currently BoringSSL does not include these when calling SSL.getCiphers() even when these
// are supported.
Collections.addAll(availableOpenSslCipherSuites, EXTRA_SUPPORTED_TLS_1_3_CIPHERS);
Collections.addAll(availableOpenSslCipherSuites,
"AEAD-AES128-GCM-SHA256",
"AEAD-AES256-GCM-SHA384",
"AEAD-CHACHA20-POLY1305-SHA256");
}
PemEncoded privateKey = PemPrivateKey.valueOf(PROBING_KEY.getBytes(CharsetUtil.US_ASCII));
try {
// Let's check if we can set a callback, which may not work if the used OpenSSL version
// is to old.
SSLContext.setCertificateCallback(sslCtx, null);
X509Certificate certificate = selfSignedCertificate();
certBio = ReferenceCountedOpenSslContext.toBIO(ByteBufAllocator.DEFAULT, certificate);
cert = SSL.parseX509Chain(certBio);
keyBio = ReferenceCountedOpenSslContext.toBIO(
UnpooledByteBufAllocator.DEFAULT, privateKey.retain());
key = SSL.parsePrivateKey(keyBio, null);
SSL.setKeyMaterial(ssl, cert, key);
supportsKeyManagerFactory = true;
try {
boolean propertySet = SystemPropertyUtil.contains(
"io.netty.handler.ssl.openssl.useKeyManagerFactory");
if (!IS_BORINGSSL) {
useKeyManagerFactory = SystemPropertyUtil.getBoolean(
"io.netty.handler.ssl.openssl.useKeyManagerFactory", true);
if (propertySet) {
logger.info("System property " +
"'io.netty.handler.ssl.openssl.useKeyManagerFactory'" +
" is deprecated and so will be ignored in the future");
}
} else {
useKeyManagerFactory = true;
if (propertySet) {
logger.info("System property " +
"'io.netty.handler.ssl.openssl.useKeyManagerFactory'" +
" is deprecated and will be ignored when using BoringSSL");
}
}
} catch (Throwable ignore) {
logger.debug("Failed to get useKeyManagerFactory system property.");
}
} catch (Error ignore) {
logger.debug("KeyManagerFactory not supported.");
} finally {
privateKey.release();
}
} finally {
SSL.freeSSL(ssl);
if (certBio != 0) {
SSL.freeBIO(certBio);
}
if (keyBio != 0) {
SSL.freeBIO(keyBio);
}
if (cert != 0) {
SSL.freeX509Chain(cert);
}
if (key != 0) {
SSL.freePrivateKey(key);
}
}
String groups = SystemPropertyUtil.get("jdk.tls.namedGroups", null);
if (groups != null) {
String[] nGroups = groups.split(",");
Set<String> supportedNamedGroups = new LinkedHashSet<String>(nGroups.length);
Set<String> supportedConvertedNamedGroups = new LinkedHashSet<String>(nGroups.length);
Set<String> unsupportedNamedGroups = new LinkedHashSet<String>();
for (String namedGroup : nGroups) {
String converted = GroupsConverter.toOpenSsl(namedGroup);
if (SSLContext.setCurvesList(sslCtx, converted)) {
supportedConvertedNamedGroups.add(converted);
supportedNamedGroups.add(namedGroup);
} else {
unsupportedNamedGroups.add(namedGroup);
}
}
if (supportedNamedGroups.isEmpty()) {
namedGroups = defaultConvertedNamedGroups;
logger.info("All configured namedGroups are not supported: {}. Use default: {}.",
Arrays.toString(unsupportedNamedGroups.toArray(EmptyArrays.EMPTY_STRINGS)),
Arrays.toString(DEFAULT_NAMED_GROUPS));
} else {
String[] groupArray = supportedNamedGroups.toArray(EmptyArrays.EMPTY_STRINGS);
if (unsupportedNamedGroups.isEmpty()) {
logger.info("Using configured namedGroups -D 'jdk.tls.namedGroup': {} ",
Arrays.toString(groupArray));
} else {
logger.info("Using supported configured namedGroups: {}. Unsupported namedGroups: {}. ",
Arrays.toString(groupArray),
Arrays.toString(unsupportedNamedGroups.toArray(EmptyArrays.EMPTY_STRINGS)));
}
namedGroups = supportedConvertedNamedGroups.toArray(EmptyArrays.EMPTY_STRINGS);
}
} else {
namedGroups = defaultConvertedNamedGroups;
}
} finally {
SSLContext.free(sslCtx);
}
} catch (Exception e) {
logger.warn("Failed to get the list of available OpenSSL cipher suites.", e);
}
NAMED_GROUPS = namedGroups;
AVAILABLE_OPENSSL_CIPHER_SUITES = Collections.unmodifiableSet(availableOpenSslCipherSuites);
final Set<String> availableJavaCipherSuites = new LinkedHashSet<String>(
AVAILABLE_OPENSSL_CIPHER_SUITES.size() * 2);
for (String cipher: AVAILABLE_OPENSSL_CIPHER_SUITES) {
// Included converted but also openssl cipher name
if (!isTLSv13Cipher(cipher)) {
availableJavaCipherSuites.add(CipherSuiteConverter.toJava(cipher, "TLS"));
availableJavaCipherSuites.add(CipherSuiteConverter.toJava(cipher, "SSL"));
} else {
// TLSv1.3 ciphers have the correct format.
availableJavaCipherSuites.add(cipher);
}
}
addIfSupported(availableJavaCipherSuites, defaultCiphers, DEFAULT_CIPHER_SUITES);
addIfSupported(availableJavaCipherSuites, defaultCiphers, TLSV13_CIPHER_SUITES);
// Also handle the extra supported ciphers as these will contain some more stuff on BoringSSL.
addIfSupported(availableJavaCipherSuites, defaultCiphers, EXTRA_SUPPORTED_TLS_1_3_CIPHERS);
useFallbackCiphersIfDefaultIsEmpty(defaultCiphers, availableJavaCipherSuites);
DEFAULT_CIPHERS = Collections.unmodifiableList(defaultCiphers);
AVAILABLE_JAVA_CIPHER_SUITES = Collections.unmodifiableSet(availableJavaCipherSuites);
final Set<String> availableCipherSuites = new LinkedHashSet<String>(
AVAILABLE_OPENSSL_CIPHER_SUITES.size() + AVAILABLE_JAVA_CIPHER_SUITES.size());
availableCipherSuites.addAll(AVAILABLE_OPENSSL_CIPHER_SUITES);
availableCipherSuites.addAll(AVAILABLE_JAVA_CIPHER_SUITES);
AVAILABLE_CIPHER_SUITES = availableCipherSuites;
SUPPORTS_KEYMANAGER_FACTORY = supportsKeyManagerFactory;
USE_KEYMANAGER_FACTORY = useKeyManagerFactory;
Set<String> protocols = new LinkedHashSet<String>(6);
// Seems like there is no way to explicitly disable SSLv2Hello in openssl so it is always enabled
protocols.add(SslProtocols.SSL_v2_HELLO);
if (doesSupportProtocol(SSL.SSL_PROTOCOL_SSLV2, SSL.SSL_OP_NO_SSLv2)) {
protocols.add(SslProtocols.SSL_v2);
}
if (doesSupportProtocol(SSL.SSL_PROTOCOL_SSLV3, SSL.SSL_OP_NO_SSLv3)) {
protocols.add(SslProtocols.SSL_v3);
}
if (doesSupportProtocol(SSL.SSL_PROTOCOL_TLSV1, SSL.SSL_OP_NO_TLSv1)) {
protocols.add(SslProtocols.TLS_v1);
}
if (doesSupportProtocol(SSL.SSL_PROTOCOL_TLSV1_1, SSL.SSL_OP_NO_TLSv1_1)) {
protocols.add(SslProtocols.TLS_v1_1);
}
if (doesSupportProtocol(SSL.SSL_PROTOCOL_TLSV1_2, SSL.SSL_OP_NO_TLSv1_2)) {
protocols.add(SslProtocols.TLS_v1_2);
}
// This is only supported by java8u272 and later.
if (tlsv13Supported && doesSupportProtocol(SSL.SSL_PROTOCOL_TLSV1_3, SSL.SSL_OP_NO_TLSv1_3)) {
protocols.add(SslProtocols.TLS_v1_3);
TLSV13_SUPPORTED = true;
} else {
TLSV13_SUPPORTED = false;
}
SUPPORTED_PROTOCOLS_SET = Collections.unmodifiableSet(protocols);
SUPPORTS_OCSP = doesSupportOcsp();
if (logger.isDebugEnabled()) {
logger.debug("Supported protocols (OpenSSL): {} ", SUPPORTED_PROTOCOLS_SET);
logger.debug("Default cipher suites (OpenSSL): {}", DEFAULT_CIPHERS);
}
// Check if we can create a javax.security.cert.X509Certificate from our cert. This might fail on
// JDK17 and above. In this case we will later throw an UnsupportedOperationException if someone
// tries to access these via SSLSession. See https://github.com/netty/netty/issues/13560.
boolean javaxCertificateCreationSupported;
try {
javax.security.cert.X509Certificate.getInstance(PROBING_CERT.getBytes(CharsetUtil.US_ASCII));
javaxCertificateCreationSupported = true;
} catch (javax.security.cert.CertificateException ex) {
javaxCertificateCreationSupported = false;
}
JAVAX_CERTIFICATE_CREATION_SUPPORTED = javaxCertificateCreationSupported;
} else {
DEFAULT_CIPHERS = Collections.emptyList();
AVAILABLE_OPENSSL_CIPHER_SUITES = Collections.emptySet();
AVAILABLE_JAVA_CIPHER_SUITES = Collections.emptySet();
AVAILABLE_CIPHER_SUITES = Collections.emptySet();
SUPPORTS_KEYMANAGER_FACTORY = false;
USE_KEYMANAGER_FACTORY = false;
SUPPORTED_PROTOCOLS_SET = Collections.emptySet();
SUPPORTS_OCSP = false;
TLSV13_SUPPORTED = false;
IS_BORINGSSL = false;
EXTRA_SUPPORTED_TLS_1_3_CIPHERS = EmptyArrays.EMPTY_STRINGS;
EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING = StringUtil.EMPTY_STRING;
NAMED_GROUPS = DEFAULT_NAMED_GROUPS;
JAVAX_CERTIFICATE_CREATION_SUPPORTED = false;
}
}
static String checkTls13Ciphers(InternalLogger logger, String ciphers) {
if (IS_BORINGSSL && !ciphers.isEmpty()) {
assert EXTRA_SUPPORTED_TLS_1_3_CIPHERS.length > 0;
Set<String> boringsslTlsv13Ciphers = new HashSet<String>(EXTRA_SUPPORTED_TLS_1_3_CIPHERS.length);
Collections.addAll(boringsslTlsv13Ciphers, EXTRA_SUPPORTED_TLS_1_3_CIPHERS);
boolean ciphersNotMatch = false;
for (String cipher: ciphers.split(":")) {
if (boringsslTlsv13Ciphers.isEmpty()) {
ciphersNotMatch = true;
break;
}
if (!boringsslTlsv13Ciphers.remove(cipher) &&
!boringsslTlsv13Ciphers.remove(CipherSuiteConverter.toJava(cipher, "TLS"))) {
ciphersNotMatch = true;
break;
}
}
// Also check if there are ciphers left.
ciphersNotMatch |= !boringsslTlsv13Ciphers.isEmpty();
if (ciphersNotMatch) {
if (logger.isInfoEnabled()) {
StringBuilder javaCiphers = new StringBuilder(128);
for (String cipher : ciphers.split(":")) {
javaCiphers.append(CipherSuiteConverter.toJava(cipher, "TLS")).append(":");
}
javaCiphers.setLength(javaCiphers.length() - 1);
logger.info(
"BoringSSL doesn't allow to enable or disable TLSv1.3 ciphers explicitly." +
" Provided TLSv1.3 ciphers: '{}', default TLSv1.3 ciphers that will be used: '{}'.",
javaCiphers, EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING);
}
return EXTRA_SUPPORTED_TLS_1_3_CIPHERS_STRING;
}
}
return ciphers;
}
static boolean isSessionCacheSupported() {
return version() >= 0x10100000L;
}
/**
* Returns a self-signed {@link X509Certificate} for {@code netty.io}.
*/
static X509Certificate selfSignedCertificate() throws CertificateException {
return (X509Certificate) SslContext.X509_CERT_FACTORY.generateCertificate(
new ByteArrayInputStream(PROBING_CERT.getBytes(CharsetUtil.US_ASCII))
);
}
private static boolean doesSupportOcsp() {
boolean supportsOcsp = false;
if (version() >= 0x10002000L) {
long sslCtx = -1;
try {
sslCtx = SSLContext.make(SSL.SSL_PROTOCOL_TLSV1_2, SSL.SSL_MODE_SERVER);
SSLContext.enableOcsp(sslCtx, false);
supportsOcsp = true;
} catch (Exception ignore) {
// ignore
} finally {
if (sslCtx != -1) {
SSLContext.free(sslCtx);
}
}
}
return supportsOcsp;
}
private static boolean doesSupportProtocol(int protocol, int opt) {
if (opt == 0) {
// If the opt is 0 the protocol is not supported. This is for example the case with BoringSSL and SSLv2.
return false;
}
long sslCtx = -1;
try {
sslCtx = SSLContext.make(protocol, SSL.SSL_MODE_COMBINED);
return true;
} catch (Exception ignore) {
return false;
} finally {
if (sslCtx != -1) {
SSLContext.free(sslCtx);
}
}
}
/**
* Returns {@code true} if and only if
* <a href="https://netty.io/wiki/forked-tomcat-native.html">{@code netty-tcnative}</a> and its OpenSSL support
* are available.
*/
public static boolean isAvailable() {
return UNAVAILABILITY_CAUSE == null;
}
/**
* Returns {@code true} if the used version of openssl supports
* <a href="https://tools.ietf.org/html/rfc7301">ALPN</a>.
*
* @deprecated use {@link SslProvider#isAlpnSupported(SslProvider)} with {@link SslProvider#OPENSSL}.
*/
@Deprecated
public static boolean isAlpnSupported() {
return version() >= 0x10002000L;
}
/**
* Returns {@code true} if the used version of OpenSSL supports OCSP stapling.
*/
public static boolean isOcspSupported() {
return SUPPORTS_OCSP;
}
/**
* Returns the version of the used available OpenSSL library or {@code -1} if {@link #isAvailable()}
* returns {@code false}.
*/
public static int version() {
return isAvailable() ? SSL.version() : -1;
}
/**
* Returns the version string of the used available OpenSSL library or {@code null} if {@link #isAvailable()}
* returns {@code false}.
*/
public static String versionString() {
return isAvailable() ? SSL.versionString() : null;
}
/**
* Ensure that <a href="https://netty.io/wiki/forked-tomcat-native.html">{@code netty-tcnative}</a> and
* its OpenSSL support are available.
*
* @throws UnsatisfiedLinkError if unavailable
*/
public static void ensureAvailability() {
if (UNAVAILABILITY_CAUSE != null) {
throw (Error) new UnsatisfiedLinkError(
"failed to load the required native library").initCause(UNAVAILABILITY_CAUSE);
}
}
/**
* Returns the cause of unavailability of
* <a href="https://netty.io/wiki/forked-tomcat-native.html">{@code netty-tcnative}</a> and its OpenSSL support.
*
* @return the cause if unavailable. {@code null} if available.
*/
public static Throwable unavailabilityCause() {
return UNAVAILABILITY_CAUSE;
}
/**
* @deprecated use {@link #availableOpenSslCipherSuites()}
*/
@Deprecated
public static Set<String> availableCipherSuites() {
return availableOpenSslCipherSuites();
}
/**
* Returns all the available OpenSSL cipher suites.
* Please note that the returned array may include the cipher suites that are insecure or non-functional.
*/
public static Set<String> availableOpenSslCipherSuites() {
return AVAILABLE_OPENSSL_CIPHER_SUITES;
}
/**
* Returns all the available cipher suites (Java-style).
* Please note that the returned array may include the cipher suites that are insecure or non-functional.
*/
public static Set<String> availableJavaCipherSuites() {
return AVAILABLE_JAVA_CIPHER_SUITES;
}
/**
* Returns {@code true} if and only if the specified cipher suite is available in OpenSSL.
* Both Java-style cipher suite and OpenSSL-style cipher suite are accepted.
*/
public static boolean isCipherSuiteAvailable(String cipherSuite) {
String converted = CipherSuiteConverter.toOpenSsl(cipherSuite, IS_BORINGSSL);
if (converted != null) {
cipherSuite = converted;
}
return AVAILABLE_OPENSSL_CIPHER_SUITES.contains(cipherSuite);
}
/**
* Returns {@code true} if {@link javax.net.ssl.KeyManagerFactory} is supported when using OpenSSL.
*/
public static boolean supportsKeyManagerFactory() {
return SUPPORTS_KEYMANAGER_FACTORY;
}
/**
* Always returns {@code true} if {@link #isAvailable()} returns {@code true}.
*
* @deprecated Will be removed because hostname validation is always done by a
* {@link javax.net.ssl.TrustManager} implementation.
*/
@Deprecated
public static boolean supportsHostnameValidation() {
return isAvailable();
}
static boolean useKeyManagerFactory() {
return USE_KEYMANAGER_FACTORY;
}
static long memoryAddress(ByteBuf buf) {
assert buf.isDirect();
return buf.hasMemoryAddress() ? buf.memoryAddress() :
// Use internalNioBuffer to reduce object creation.
Buffer.address(buf.internalNioBuffer(0, buf.readableBytes()));
}
private OpenSsl() { }
private static void loadTcNative() throws Exception {
String os = PlatformDependent.normalizedOs();
String arch = PlatformDependent.normalizedArch();
Set<String> libNames = new LinkedHashSet<String>(5);
String staticLibName = "netty_tcnative";
// First, try loading the platform-specific library. Platform-specific
// libraries will be available if using a tcnative uber jar.
if ("linux".equals(os)) {
Set<String> classifiers = PlatformDependent.normalizedLinuxClassifiers();
for (String classifier : classifiers) {
libNames.add(staticLibName + "_" + os + '_' + arch + "_" + classifier);
}
// generic arch-dependent<SUF>
libNames.add(staticLibName + "_" + os + '_' + arch);
// Fedora SSL lib so naming (libssl.so.10 vs libssl.so.1.0.0).
// note: should already be included from the classifiers but if not, we use this as an
// additional fallback option here
libNames.add(staticLibName + "_" + os + '_' + arch + "_fedora");
} else {
libNames.add(staticLibName + "_" + os + '_' + arch);
}
libNames.add(staticLibName + "_" + arch);
libNames.add(staticLibName);
NativeLibraryLoader.loadFirstAvailable(PlatformDependent.getClassLoader(SSLContext.class),
libNames.toArray(EmptyArrays.EMPTY_STRINGS));
}
private static boolean initializeTcNative(String engine) throws Exception {
return Library.initialize("provided", engine);
}
static void releaseIfNeeded(ReferenceCounted counted) {
if (counted.refCnt() > 0) {
ReferenceCountUtil.safeRelease(counted);
}
}
static boolean isTlsv13Supported() {
return TLSV13_SUPPORTED;
}
static boolean isOptionSupported(SslContextOption<?> option) {
if (isAvailable()) {
if (option == OpenSslContextOption.USE_TASKS) {
return true;
}
// Check for options that are only supported by BoringSSL atm.
if (isBoringSSL()) {
return option == OpenSslContextOption.ASYNC_PRIVATE_KEY_METHOD ||
option == OpenSslContextOption.PRIVATE_KEY_METHOD ||
option == OpenSslContextOption.CERTIFICATE_COMPRESSION_ALGORITHMS ||
option == OpenSslContextOption.TLS_FALSE_START ||
option == OpenSslContextOption.MAX_CERTIFICATE_LIST_BYTES;
}
}
return false;
}
private static Set<String> defaultProtocols(String property) {
String protocolsString = SystemPropertyUtil.get(property, null);
Set<String> protocols = new HashSet<String>();
if (protocolsString != null) {
for (String proto : protocolsString.split(",")) {
String p = proto.trim();
protocols.add(p);
}
} else {
protocols.add(SslProtocols.TLS_v1_2);
protocols.add(SslProtocols.TLS_v1_3);
}
return protocols;
}
static String[] defaultProtocols(boolean isClient) {
final Collection<String> defaultProtocols = isClient ? CLIENT_DEFAULT_PROTOCOLS : SERVER_DEFAULT_PROTOCOLS;
assert defaultProtocols != null;
List<String> protocols = new ArrayList<String>(defaultProtocols.size());
for (String proto : defaultProtocols) {
if (SUPPORTED_PROTOCOLS_SET.contains(proto)) {
protocols.add(proto);
}
}
return protocols.toArray(EmptyArrays.EMPTY_STRINGS);
}
static boolean isBoringSSL() {
return IS_BORINGSSL;
}
}
|
40_6 | /*
* Copyright 2020 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.buffer;
import static io.netty.buffer.PoolThreadCache.*;
/**
* SizeClasses requires {@code pageShifts} to be defined prior to inclusion,
* and it in turn defines:
* <p>
* LOG2_SIZE_CLASS_GROUP: Log of size class count for each size doubling.
* LOG2_MAX_LOOKUP_SIZE: Log of max size class in the lookup table.
* sizeClasses: Complete table of [index, log2Group, log2Delta, nDelta, isMultiPageSize,
* isSubPage, log2DeltaLookup] tuples.
* index: Size class index.
* log2Group: Log of group base size (no deltas added).
* log2Delta: Log of delta to previous size class.
* nDelta: Delta multiplier.
* isMultiPageSize: 'yes' if a multiple of the page size, 'no' otherwise.
* isSubPage: 'yes' if a subpage size class, 'no' otherwise.
* log2DeltaLookup: Same as log2Delta if a lookup table size class, 'no'
* otherwise.
* <p>
* nSubpages: Number of subpages size classes.
* nSizes: Number of size classes.
* nPSizes: Number of size classes that are multiples of pageSize.
*
* smallMaxSizeIdx: Maximum small size class index.
*
* lookupMaxClass: Maximum size class included in lookup table.
* log2NormalMinClass: Log of minimum normal size class.
* <p>
* The first size class and spacing are 1 << LOG2_QUANTUM.
* Each group has 1 << LOG2_SIZE_CLASS_GROUP of size classes.
*
* size = 1 << log2Group + nDelta * (1 << log2Delta)
*
* The first size class has an unusual encoding, because the size has to be
* split between group and delta*nDelta.
*
* If pageShift = 13, sizeClasses looks like this:
*
* (index, log2Group, log2Delta, nDelta, isMultiPageSize, isSubPage, log2DeltaLookup)
* <p>
* ( 0, 4, 4, 0, no, yes, 4)
* ( 1, 4, 4, 1, no, yes, 4)
* ( 2, 4, 4, 2, no, yes, 4)
* ( 3, 4, 4, 3, no, yes, 4)
* <p>
* ( 4, 6, 4, 1, no, yes, 4)
* ( 5, 6, 4, 2, no, yes, 4)
* ( 6, 6, 4, 3, no, yes, 4)
* ( 7, 6, 4, 4, no, yes, 4)
* <p>
* ( 8, 7, 5, 1, no, yes, 5)
* ( 9, 7, 5, 2, no, yes, 5)
* ( 10, 7, 5, 3, no, yes, 5)
* ( 11, 7, 5, 4, no, yes, 5)
* ...
* ...
* ( 72, 23, 21, 1, yes, no, no)
* ( 73, 23, 21, 2, yes, no, no)
* ( 74, 23, 21, 3, yes, no, no)
* ( 75, 23, 21, 4, yes, no, no)
* <p>
* ( 76, 24, 22, 1, yes, no, no)
*/
final class SizeClasses implements SizeClassesMetric {
static final int LOG2_QUANTUM = 4;
private static final int LOG2_SIZE_CLASS_GROUP = 2;
private static final int LOG2_MAX_LOOKUP_SIZE = 12;
private static final int LOG2GROUP_IDX = 1;
private static final int LOG2DELTA_IDX = 2;
private static final int NDELTA_IDX = 3;
private static final int PAGESIZE_IDX = 4;
private static final int SUBPAGE_IDX = 5;
private static final int LOG2_DELTA_LOOKUP_IDX = 6;
private static final byte no = 0, yes = 1;
final int pageSize;
final int pageShifts;
final int chunkSize;
final int directMemoryCacheAlignment;
final int nSizes;
final int nSubpages;
final int nPSizes;
final int lookupMaxSize;
final int smallMaxSizeIdx;
private final int[] pageIdx2sizeTab;
// lookup table for sizeIdx <= smallMaxSizeIdx
private final int[] sizeIdx2sizeTab;
// lookup table used for size <= lookupMaxClass
// spacing is 1 << LOG2_QUANTUM, so the size of array is lookupMaxClass >> LOG2_QUANTUM
private final int[] size2idxTab;
SizeClasses(int pageSize, int pageShifts, int chunkSize, int directMemoryCacheAlignment) {
int group = log2(chunkSize) - LOG2_QUANTUM - LOG2_SIZE_CLASS_GROUP + 1;
//generate size classes
//[index, log2Group, log2Delta, nDelta, isMultiPageSize, isSubPage, log2DeltaLookup]
short[][] sizeClasses = new short[group << LOG2_SIZE_CLASS_GROUP][7];
int normalMaxSize = -1;
int nSizes = 0;
int size = 0;
int log2Group = LOG2_QUANTUM;
int log2Delta = LOG2_QUANTUM;
int ndeltaLimit = 1 << LOG2_SIZE_CLASS_GROUP;
//First small group, nDelta start at 0.
//first size class is 1 << LOG2_QUANTUM
for (int nDelta = 0; nDelta < ndeltaLimit; nDelta++, nSizes++) {
short[] sizeClass = newSizeClass(nSizes, log2Group, log2Delta, nDelta, pageShifts);
sizeClasses[nSizes] = sizeClass;
size = sizeOf(sizeClass, directMemoryCacheAlignment);
}
log2Group += LOG2_SIZE_CLASS_GROUP;
//All remaining groups, nDelta start at 1.
for (; size < chunkSize; log2Group++, log2Delta++) {
for (int nDelta = 1; nDelta <= ndeltaLimit && size < chunkSize; nDelta++, nSizes++) {
short[] sizeClass = newSizeClass(nSizes, log2Group, log2Delta, nDelta, pageShifts);
sizeClasses[nSizes] = sizeClass;
size = normalMaxSize = sizeOf(sizeClass, directMemoryCacheAlignment);
}
}
//chunkSize must be normalMaxSize
assert chunkSize == normalMaxSize;
int smallMaxSizeIdx = 0;
int lookupMaxSize = 0;
int nPSizes = 0;
int nSubpages = 0;
for (int idx = 0; idx < nSizes; idx++) {
short[] sz = sizeClasses[idx];
if (sz[PAGESIZE_IDX] == yes) {
nPSizes++;
}
if (sz[SUBPAGE_IDX] == yes) {
nSubpages++;
smallMaxSizeIdx = idx;
}
if (sz[LOG2_DELTA_LOOKUP_IDX] != no) {
lookupMaxSize = sizeOf(sz, directMemoryCacheAlignment);
}
}
this.smallMaxSizeIdx = smallMaxSizeIdx;
this.lookupMaxSize = lookupMaxSize;
this.nPSizes = nPSizes;
this.nSubpages = nSubpages;
this.nSizes = nSizes;
this.pageSize = pageSize;
this.pageShifts = pageShifts;
this.chunkSize = chunkSize;
this.directMemoryCacheAlignment = directMemoryCacheAlignment;
//generate lookup tables
this.sizeIdx2sizeTab = newIdx2SizeTab(sizeClasses, nSizes, directMemoryCacheAlignment);
this.pageIdx2sizeTab = newPageIdx2sizeTab(sizeClasses, nSizes, nPSizes, directMemoryCacheAlignment);
this.size2idxTab = newSize2idxTab(lookupMaxSize, sizeClasses);
}
//calculate size class
private static short[] newSizeClass(int index, int log2Group, int log2Delta, int nDelta, int pageShifts) {
short isMultiPageSize;
if (log2Delta >= pageShifts) {
isMultiPageSize = yes;
} else {
int pageSize = 1 << pageShifts;
int size = calculateSize(log2Group, nDelta, log2Delta);
isMultiPageSize = size == size / pageSize * pageSize? yes : no;
}
int log2Ndelta = nDelta == 0? 0 : log2(nDelta);
byte remove = 1 << log2Ndelta < nDelta? yes : no;
int log2Size = log2Delta + log2Ndelta == log2Group? log2Group + 1 : log2Group;
if (log2Size == log2Group) {
remove = yes;
}
short isSubpage = log2Size < pageShifts + LOG2_SIZE_CLASS_GROUP? yes : no;
int log2DeltaLookup = log2Size < LOG2_MAX_LOOKUP_SIZE ||
log2Size == LOG2_MAX_LOOKUP_SIZE && remove == no
? log2Delta : no;
return new short[] {
(short) index, (short) log2Group, (short) log2Delta,
(short) nDelta, isMultiPageSize, isSubpage, (short) log2DeltaLookup
};
}
private static int[] newIdx2SizeTab(short[][] sizeClasses, int nSizes, int directMemoryCacheAlignment) {
int[] sizeIdx2sizeTab = new int[nSizes];
for (int i = 0; i < nSizes; i++) {
short[] sizeClass = sizeClasses[i];
sizeIdx2sizeTab[i] = sizeOf(sizeClass, directMemoryCacheAlignment);
}
return sizeIdx2sizeTab;
}
private static int calculateSize(int log2Group, int nDelta, int log2Delta) {
return (1 << log2Group) + (nDelta << log2Delta);
}
private static int sizeOf(short[] sizeClass, int directMemoryCacheAlignment) {
int log2Group = sizeClass[LOG2GROUP_IDX];
int log2Delta = sizeClass[LOG2DELTA_IDX];
int nDelta = sizeClass[NDELTA_IDX];
int size = calculateSize(log2Group, nDelta, log2Delta);
return alignSizeIfNeeded(size, directMemoryCacheAlignment);
}
private static int[] newPageIdx2sizeTab(short[][] sizeClasses, int nSizes, int nPSizes,
int directMemoryCacheAlignment) {
int[] pageIdx2sizeTab = new int[nPSizes];
int pageIdx = 0;
for (int i = 0; i < nSizes; i++) {
short[] sizeClass = sizeClasses[i];
if (sizeClass[PAGESIZE_IDX] == yes) {
pageIdx2sizeTab[pageIdx++] = sizeOf(sizeClass, directMemoryCacheAlignment);
}
}
return pageIdx2sizeTab;
}
private static int[] newSize2idxTab(int lookupMaxSize, short[][] sizeClasses) {
int[] size2idxTab = new int[lookupMaxSize >> LOG2_QUANTUM];
int idx = 0;
int size = 0;
for (int i = 0; size <= lookupMaxSize; i++) {
int log2Delta = sizeClasses[i][LOG2DELTA_IDX];
int times = 1 << log2Delta - LOG2_QUANTUM;
while (size <= lookupMaxSize && times-- > 0) {
size2idxTab[idx++] = i;
size = idx + 1 << LOG2_QUANTUM;
}
}
return size2idxTab;
}
@Override
public int sizeIdx2size(int sizeIdx) {
return sizeIdx2sizeTab[sizeIdx];
}
@Override
public int sizeIdx2sizeCompute(int sizeIdx) {
int group = sizeIdx >> LOG2_SIZE_CLASS_GROUP;
int mod = sizeIdx & (1 << LOG2_SIZE_CLASS_GROUP) - 1;
int groupSize = group == 0? 0 :
1 << LOG2_QUANTUM + LOG2_SIZE_CLASS_GROUP - 1 << group;
int shift = group == 0? 1 : group;
int lgDelta = shift + LOG2_QUANTUM - 1;
int modSize = mod + 1 << lgDelta;
return groupSize + modSize;
}
@Override
public long pageIdx2size(int pageIdx) {
return pageIdx2sizeTab[pageIdx];
}
@Override
public long pageIdx2sizeCompute(int pageIdx) {
int group = pageIdx >> LOG2_SIZE_CLASS_GROUP;
int mod = pageIdx & (1 << LOG2_SIZE_CLASS_GROUP) - 1;
long groupSize = group == 0? 0 :
1L << pageShifts + LOG2_SIZE_CLASS_GROUP - 1 << group;
int shift = group == 0? 1 : group;
int log2Delta = shift + pageShifts - 1;
int modSize = mod + 1 << log2Delta;
return groupSize + modSize;
}
@Override
public int size2SizeIdx(int size) {
if (size == 0) {
return 0;
}
if (size > chunkSize) {
return nSizes;
}
size = alignSizeIfNeeded(size, directMemoryCacheAlignment);
if (size <= lookupMaxSize) {
//size-1 / MIN_TINY
return size2idxTab[size - 1 >> LOG2_QUANTUM];
}
int x = log2((size << 1) - 1);
int shift = x < LOG2_SIZE_CLASS_GROUP + LOG2_QUANTUM + 1
? 0 : x - (LOG2_SIZE_CLASS_GROUP + LOG2_QUANTUM);
int group = shift << LOG2_SIZE_CLASS_GROUP;
int log2Delta = x < LOG2_SIZE_CLASS_GROUP + LOG2_QUANTUM + 1
? LOG2_QUANTUM : x - LOG2_SIZE_CLASS_GROUP - 1;
int mod = size - 1 >> log2Delta & (1 << LOG2_SIZE_CLASS_GROUP) - 1;
return group + mod;
}
@Override
public int pages2pageIdx(int pages) {
return pages2pageIdxCompute(pages, false);
}
@Override
public int pages2pageIdxFloor(int pages) {
return pages2pageIdxCompute(pages, true);
}
private int pages2pageIdxCompute(int pages, boolean floor) {
int pageSize = pages << pageShifts;
if (pageSize > chunkSize) {
return nPSizes;
}
int x = log2((pageSize << 1) - 1);
int shift = x < LOG2_SIZE_CLASS_GROUP + pageShifts
? 0 : x - (LOG2_SIZE_CLASS_GROUP + pageShifts);
int group = shift << LOG2_SIZE_CLASS_GROUP;
int log2Delta = x < LOG2_SIZE_CLASS_GROUP + pageShifts + 1?
pageShifts : x - LOG2_SIZE_CLASS_GROUP - 1;
int mod = pageSize - 1 >> log2Delta & (1 << LOG2_SIZE_CLASS_GROUP) - 1;
int pageIdx = group + mod;
if (floor && pageIdx2sizeTab[pageIdx] > pages << pageShifts) {
pageIdx--;
}
return pageIdx;
}
// Round size up to the nearest multiple of alignment.
private static int alignSizeIfNeeded(int size, int directMemoryCacheAlignment) {
if (directMemoryCacheAlignment <= 0) {
return size;
}
int delta = size & directMemoryCacheAlignment - 1;
return delta == 0? size : size + directMemoryCacheAlignment - delta;
}
@Override
public int normalizeSize(int size) {
if (size == 0) {
return sizeIdx2sizeTab[0];
}
size = alignSizeIfNeeded(size, directMemoryCacheAlignment);
if (size <= lookupMaxSize) {
int ret = sizeIdx2sizeTab[size2idxTab[size - 1 >> LOG2_QUANTUM]];
assert ret == normalizeSizeCompute(size);
return ret;
}
return normalizeSizeCompute(size);
}
private static int normalizeSizeCompute(int size) {
int x = log2((size << 1) - 1);
int log2Delta = x < LOG2_SIZE_CLASS_GROUP + LOG2_QUANTUM + 1
? LOG2_QUANTUM : x - LOG2_SIZE_CLASS_GROUP - 1;
int delta = 1 << log2Delta;
int delta_mask = delta - 1;
return size + delta_mask & ~delta_mask;
}
}
| netty/netty | buffer/src/main/java/io/netty/buffer/SizeClasses.java | 4,514 | //[index, log2Group, log2Delta, nDelta, isMultiPageSize, isSubPage, log2DeltaLookup] | line_comment | nl | /*
* Copyright 2020 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.buffer;
import static io.netty.buffer.PoolThreadCache.*;
/**
* SizeClasses requires {@code pageShifts} to be defined prior to inclusion,
* and it in turn defines:
* <p>
* LOG2_SIZE_CLASS_GROUP: Log of size class count for each size doubling.
* LOG2_MAX_LOOKUP_SIZE: Log of max size class in the lookup table.
* sizeClasses: Complete table of [index, log2Group, log2Delta, nDelta, isMultiPageSize,
* isSubPage, log2DeltaLookup] tuples.
* index: Size class index.
* log2Group: Log of group base size (no deltas added).
* log2Delta: Log of delta to previous size class.
* nDelta: Delta multiplier.
* isMultiPageSize: 'yes' if a multiple of the page size, 'no' otherwise.
* isSubPage: 'yes' if a subpage size class, 'no' otherwise.
* log2DeltaLookup: Same as log2Delta if a lookup table size class, 'no'
* otherwise.
* <p>
* nSubpages: Number of subpages size classes.
* nSizes: Number of size classes.
* nPSizes: Number of size classes that are multiples of pageSize.
*
* smallMaxSizeIdx: Maximum small size class index.
*
* lookupMaxClass: Maximum size class included in lookup table.
* log2NormalMinClass: Log of minimum normal size class.
* <p>
* The first size class and spacing are 1 << LOG2_QUANTUM.
* Each group has 1 << LOG2_SIZE_CLASS_GROUP of size classes.
*
* size = 1 << log2Group + nDelta * (1 << log2Delta)
*
* The first size class has an unusual encoding, because the size has to be
* split between group and delta*nDelta.
*
* If pageShift = 13, sizeClasses looks like this:
*
* (index, log2Group, log2Delta, nDelta, isMultiPageSize, isSubPage, log2DeltaLookup)
* <p>
* ( 0, 4, 4, 0, no, yes, 4)
* ( 1, 4, 4, 1, no, yes, 4)
* ( 2, 4, 4, 2, no, yes, 4)
* ( 3, 4, 4, 3, no, yes, 4)
* <p>
* ( 4, 6, 4, 1, no, yes, 4)
* ( 5, 6, 4, 2, no, yes, 4)
* ( 6, 6, 4, 3, no, yes, 4)
* ( 7, 6, 4, 4, no, yes, 4)
* <p>
* ( 8, 7, 5, 1, no, yes, 5)
* ( 9, 7, 5, 2, no, yes, 5)
* ( 10, 7, 5, 3, no, yes, 5)
* ( 11, 7, 5, 4, no, yes, 5)
* ...
* ...
* ( 72, 23, 21, 1, yes, no, no)
* ( 73, 23, 21, 2, yes, no, no)
* ( 74, 23, 21, 3, yes, no, no)
* ( 75, 23, 21, 4, yes, no, no)
* <p>
* ( 76, 24, 22, 1, yes, no, no)
*/
final class SizeClasses implements SizeClassesMetric {
static final int LOG2_QUANTUM = 4;
private static final int LOG2_SIZE_CLASS_GROUP = 2;
private static final int LOG2_MAX_LOOKUP_SIZE = 12;
private static final int LOG2GROUP_IDX = 1;
private static final int LOG2DELTA_IDX = 2;
private static final int NDELTA_IDX = 3;
private static final int PAGESIZE_IDX = 4;
private static final int SUBPAGE_IDX = 5;
private static final int LOG2_DELTA_LOOKUP_IDX = 6;
private static final byte no = 0, yes = 1;
final int pageSize;
final int pageShifts;
final int chunkSize;
final int directMemoryCacheAlignment;
final int nSizes;
final int nSubpages;
final int nPSizes;
final int lookupMaxSize;
final int smallMaxSizeIdx;
private final int[] pageIdx2sizeTab;
// lookup table for sizeIdx <= smallMaxSizeIdx
private final int[] sizeIdx2sizeTab;
// lookup table used for size <= lookupMaxClass
// spacing is 1 << LOG2_QUANTUM, so the size of array is lookupMaxClass >> LOG2_QUANTUM
private final int[] size2idxTab;
SizeClasses(int pageSize, int pageShifts, int chunkSize, int directMemoryCacheAlignment) {
int group = log2(chunkSize) - LOG2_QUANTUM - LOG2_SIZE_CLASS_GROUP + 1;
//generate size classes
//[index, log2Group,<SUF>
short[][] sizeClasses = new short[group << LOG2_SIZE_CLASS_GROUP][7];
int normalMaxSize = -1;
int nSizes = 0;
int size = 0;
int log2Group = LOG2_QUANTUM;
int log2Delta = LOG2_QUANTUM;
int ndeltaLimit = 1 << LOG2_SIZE_CLASS_GROUP;
//First small group, nDelta start at 0.
//first size class is 1 << LOG2_QUANTUM
for (int nDelta = 0; nDelta < ndeltaLimit; nDelta++, nSizes++) {
short[] sizeClass = newSizeClass(nSizes, log2Group, log2Delta, nDelta, pageShifts);
sizeClasses[nSizes] = sizeClass;
size = sizeOf(sizeClass, directMemoryCacheAlignment);
}
log2Group += LOG2_SIZE_CLASS_GROUP;
//All remaining groups, nDelta start at 1.
for (; size < chunkSize; log2Group++, log2Delta++) {
for (int nDelta = 1; nDelta <= ndeltaLimit && size < chunkSize; nDelta++, nSizes++) {
short[] sizeClass = newSizeClass(nSizes, log2Group, log2Delta, nDelta, pageShifts);
sizeClasses[nSizes] = sizeClass;
size = normalMaxSize = sizeOf(sizeClass, directMemoryCacheAlignment);
}
}
//chunkSize must be normalMaxSize
assert chunkSize == normalMaxSize;
int smallMaxSizeIdx = 0;
int lookupMaxSize = 0;
int nPSizes = 0;
int nSubpages = 0;
for (int idx = 0; idx < nSizes; idx++) {
short[] sz = sizeClasses[idx];
if (sz[PAGESIZE_IDX] == yes) {
nPSizes++;
}
if (sz[SUBPAGE_IDX] == yes) {
nSubpages++;
smallMaxSizeIdx = idx;
}
if (sz[LOG2_DELTA_LOOKUP_IDX] != no) {
lookupMaxSize = sizeOf(sz, directMemoryCacheAlignment);
}
}
this.smallMaxSizeIdx = smallMaxSizeIdx;
this.lookupMaxSize = lookupMaxSize;
this.nPSizes = nPSizes;
this.nSubpages = nSubpages;
this.nSizes = nSizes;
this.pageSize = pageSize;
this.pageShifts = pageShifts;
this.chunkSize = chunkSize;
this.directMemoryCacheAlignment = directMemoryCacheAlignment;
//generate lookup tables
this.sizeIdx2sizeTab = newIdx2SizeTab(sizeClasses, nSizes, directMemoryCacheAlignment);
this.pageIdx2sizeTab = newPageIdx2sizeTab(sizeClasses, nSizes, nPSizes, directMemoryCacheAlignment);
this.size2idxTab = newSize2idxTab(lookupMaxSize, sizeClasses);
}
//calculate size class
private static short[] newSizeClass(int index, int log2Group, int log2Delta, int nDelta, int pageShifts) {
short isMultiPageSize;
if (log2Delta >= pageShifts) {
isMultiPageSize = yes;
} else {
int pageSize = 1 << pageShifts;
int size = calculateSize(log2Group, nDelta, log2Delta);
isMultiPageSize = size == size / pageSize * pageSize? yes : no;
}
int log2Ndelta = nDelta == 0? 0 : log2(nDelta);
byte remove = 1 << log2Ndelta < nDelta? yes : no;
int log2Size = log2Delta + log2Ndelta == log2Group? log2Group + 1 : log2Group;
if (log2Size == log2Group) {
remove = yes;
}
short isSubpage = log2Size < pageShifts + LOG2_SIZE_CLASS_GROUP? yes : no;
int log2DeltaLookup = log2Size < LOG2_MAX_LOOKUP_SIZE ||
log2Size == LOG2_MAX_LOOKUP_SIZE && remove == no
? log2Delta : no;
return new short[] {
(short) index, (short) log2Group, (short) log2Delta,
(short) nDelta, isMultiPageSize, isSubpage, (short) log2DeltaLookup
};
}
private static int[] newIdx2SizeTab(short[][] sizeClasses, int nSizes, int directMemoryCacheAlignment) {
int[] sizeIdx2sizeTab = new int[nSizes];
for (int i = 0; i < nSizes; i++) {
short[] sizeClass = sizeClasses[i];
sizeIdx2sizeTab[i] = sizeOf(sizeClass, directMemoryCacheAlignment);
}
return sizeIdx2sizeTab;
}
private static int calculateSize(int log2Group, int nDelta, int log2Delta) {
return (1 << log2Group) + (nDelta << log2Delta);
}
private static int sizeOf(short[] sizeClass, int directMemoryCacheAlignment) {
int log2Group = sizeClass[LOG2GROUP_IDX];
int log2Delta = sizeClass[LOG2DELTA_IDX];
int nDelta = sizeClass[NDELTA_IDX];
int size = calculateSize(log2Group, nDelta, log2Delta);
return alignSizeIfNeeded(size, directMemoryCacheAlignment);
}
private static int[] newPageIdx2sizeTab(short[][] sizeClasses, int nSizes, int nPSizes,
int directMemoryCacheAlignment) {
int[] pageIdx2sizeTab = new int[nPSizes];
int pageIdx = 0;
for (int i = 0; i < nSizes; i++) {
short[] sizeClass = sizeClasses[i];
if (sizeClass[PAGESIZE_IDX] == yes) {
pageIdx2sizeTab[pageIdx++] = sizeOf(sizeClass, directMemoryCacheAlignment);
}
}
return pageIdx2sizeTab;
}
private static int[] newSize2idxTab(int lookupMaxSize, short[][] sizeClasses) {
int[] size2idxTab = new int[lookupMaxSize >> LOG2_QUANTUM];
int idx = 0;
int size = 0;
for (int i = 0; size <= lookupMaxSize; i++) {
int log2Delta = sizeClasses[i][LOG2DELTA_IDX];
int times = 1 << log2Delta - LOG2_QUANTUM;
while (size <= lookupMaxSize && times-- > 0) {
size2idxTab[idx++] = i;
size = idx + 1 << LOG2_QUANTUM;
}
}
return size2idxTab;
}
@Override
public int sizeIdx2size(int sizeIdx) {
return sizeIdx2sizeTab[sizeIdx];
}
@Override
public int sizeIdx2sizeCompute(int sizeIdx) {
int group = sizeIdx >> LOG2_SIZE_CLASS_GROUP;
int mod = sizeIdx & (1 << LOG2_SIZE_CLASS_GROUP) - 1;
int groupSize = group == 0? 0 :
1 << LOG2_QUANTUM + LOG2_SIZE_CLASS_GROUP - 1 << group;
int shift = group == 0? 1 : group;
int lgDelta = shift + LOG2_QUANTUM - 1;
int modSize = mod + 1 << lgDelta;
return groupSize + modSize;
}
@Override
public long pageIdx2size(int pageIdx) {
return pageIdx2sizeTab[pageIdx];
}
@Override
public long pageIdx2sizeCompute(int pageIdx) {
int group = pageIdx >> LOG2_SIZE_CLASS_GROUP;
int mod = pageIdx & (1 << LOG2_SIZE_CLASS_GROUP) - 1;
long groupSize = group == 0? 0 :
1L << pageShifts + LOG2_SIZE_CLASS_GROUP - 1 << group;
int shift = group == 0? 1 : group;
int log2Delta = shift + pageShifts - 1;
int modSize = mod + 1 << log2Delta;
return groupSize + modSize;
}
@Override
public int size2SizeIdx(int size) {
if (size == 0) {
return 0;
}
if (size > chunkSize) {
return nSizes;
}
size = alignSizeIfNeeded(size, directMemoryCacheAlignment);
if (size <= lookupMaxSize) {
//size-1 / MIN_TINY
return size2idxTab[size - 1 >> LOG2_QUANTUM];
}
int x = log2((size << 1) - 1);
int shift = x < LOG2_SIZE_CLASS_GROUP + LOG2_QUANTUM + 1
? 0 : x - (LOG2_SIZE_CLASS_GROUP + LOG2_QUANTUM);
int group = shift << LOG2_SIZE_CLASS_GROUP;
int log2Delta = x < LOG2_SIZE_CLASS_GROUP + LOG2_QUANTUM + 1
? LOG2_QUANTUM : x - LOG2_SIZE_CLASS_GROUP - 1;
int mod = size - 1 >> log2Delta & (1 << LOG2_SIZE_CLASS_GROUP) - 1;
return group + mod;
}
@Override
public int pages2pageIdx(int pages) {
return pages2pageIdxCompute(pages, false);
}
@Override
public int pages2pageIdxFloor(int pages) {
return pages2pageIdxCompute(pages, true);
}
private int pages2pageIdxCompute(int pages, boolean floor) {
int pageSize = pages << pageShifts;
if (pageSize > chunkSize) {
return nPSizes;
}
int x = log2((pageSize << 1) - 1);
int shift = x < LOG2_SIZE_CLASS_GROUP + pageShifts
? 0 : x - (LOG2_SIZE_CLASS_GROUP + pageShifts);
int group = shift << LOG2_SIZE_CLASS_GROUP;
int log2Delta = x < LOG2_SIZE_CLASS_GROUP + pageShifts + 1?
pageShifts : x - LOG2_SIZE_CLASS_GROUP - 1;
int mod = pageSize - 1 >> log2Delta & (1 << LOG2_SIZE_CLASS_GROUP) - 1;
int pageIdx = group + mod;
if (floor && pageIdx2sizeTab[pageIdx] > pages << pageShifts) {
pageIdx--;
}
return pageIdx;
}
// Round size up to the nearest multiple of alignment.
private static int alignSizeIfNeeded(int size, int directMemoryCacheAlignment) {
if (directMemoryCacheAlignment <= 0) {
return size;
}
int delta = size & directMemoryCacheAlignment - 1;
return delta == 0? size : size + directMemoryCacheAlignment - delta;
}
@Override
public int normalizeSize(int size) {
if (size == 0) {
return sizeIdx2sizeTab[0];
}
size = alignSizeIfNeeded(size, directMemoryCacheAlignment);
if (size <= lookupMaxSize) {
int ret = sizeIdx2sizeTab[size2idxTab[size - 1 >> LOG2_QUANTUM]];
assert ret == normalizeSizeCompute(size);
return ret;
}
return normalizeSizeCompute(size);
}
private static int normalizeSizeCompute(int size) {
int x = log2((size << 1) - 1);
int log2Delta = x < LOG2_SIZE_CLASS_GROUP + LOG2_QUANTUM + 1
? LOG2_QUANTUM : x - LOG2_SIZE_CLASS_GROUP - 1;
int delta = 1 << log2Delta;
int delta_mask = delta - 1;
return size + delta_mask & ~delta_mask;
}
}
|
89_23 | // Within Settlers of Catan, the 1995 German game of the year, players attempt to dominate an island
// by building roads, settlements and cities across its uncharted wilderness.
// You are employed by a software company that just has decided to develop a computer version of
// this game, and you are chosen to implement one of the game’s special rules:
// When the game ends, the player who built the longest road gains two extra victory points.
// The problem here is that the players usually build complex road networks and not just one linear
// path. Therefore, determining the longest road is not trivial (although human players usually see it
// immediately).
// Compared to the original game, we will solve a simplified problem here: You are given a set of nodes
// (cities) and a set of edges (road segments) of length 1 connecting the nodes.
// The longest road is defined as the longest path within the network that doesn’t use an edge twice.
// Nodes may be visited more than once, though.
// Input
// The input file will contain one or more test cases.
// The first line of each test case contains two integers: the number of nodes n (2 ≤ n ≤ 25) and the
// number of edges m (1 ≤ m ≤ 25). The next m lines describe the m edges. Each edge is given by the
// numbers of the two nodes connected by it. Nodes are numbered from 0 to n − 1. Edges are undirected.
// Nodes have degrees of three or less. The network is not neccessarily connected.
// Input will be terminated by two values of 0 for n and m.
// Output
// For each test case, print the length of the longest road on a single line.
// Sample Input
// 3 2
// 0 1
// 1 2
// 15 16
// 0 2
// 1 2
// 2 3
// 3 4
// 3 5
// 4 6
// 5 7
// 6 8
// 7 8
// 7 9
// 8 10
// 9 11
// 10 12
// 11 12
// 10 13
// 12 14
// 0 0
// Sample Output
// 2
// 12
import java.io.*;
/**
* Created by kdn251 on 2/20/17.
*/
public class TheSettlersOfCatan {
public static int[][] matrix = new int[30][30];
public static int answer;
public static void main(String args[]) throws Exception {
//initialize buffered reader
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String line;
//iterate while current line is not equal to 0 0
while(!(line = br.readLine()).equals("0 0")) {
//initialize number of nodes and edges
int nodes = Integer.parseInt(line.split(" ")[0]);
int edges = Integer.parseInt(line.split(" ")[1]);
//iterate through all edges
for(int i = 0; i < edges; i++) {
//get edge between node x and node y
String[] current = br.readLine().split(" ");
int x = Integer.parseInt(current[0]);
int y = Integer.parseInt(current[1]);
//mark edge
matrix[x][y] = 1;
matrix[y][x] = 1;
}
//initialize answer to zero
answer = 0;
//dfs on every node
for(int i = 0; i < nodes; i++) {
dfs(i, 0, nodes);
}
//print answer
System.out.println(answer);
//reset graph
matrix = new int[30][30];
}
}
public static void dfs(int nd, int l, int nodes) {
//update answer if l is larger than current answer
if(l > answer) {
answer = l;
}
for(int i = 0; i < nodes; i++) {
if(matrix[nd][i] > 0) {
//ensure that edge is not counted twice (like marking as "visited")
matrix[nd][i] = 0;
matrix[i][nd] = 0;
//continue traversing graph and add 1 to count
dfs(i, l + 1, nodes);
//set current edge again in case node further into graph can reach it
matrix[nd][i] = 1;
matrix[i][nd] = 1;
}
}
}
}
//source: https://github.com/morris821028/UVa/blob/master/volume005/539%20-%20The%20Settlers%20of%20Catan.cpp
| kdn251/interviews | uva/TheSettlersOfCatan.java | 1,174 | //get edge between node x and node y | line_comment | nl | // Within Settlers of Catan, the 1995 German game of the year, players attempt to dominate an island
// by building roads, settlements and cities across its uncharted wilderness.
// You are employed by a software company that just has decided to develop a computer version of
// this game, and you are chosen to implement one of the game’s special rules:
// When the game ends, the player who built the longest road gains two extra victory points.
// The problem here is that the players usually build complex road networks and not just one linear
// path. Therefore, determining the longest road is not trivial (although human players usually see it
// immediately).
// Compared to the original game, we will solve a simplified problem here: You are given a set of nodes
// (cities) and a set of edges (road segments) of length 1 connecting the nodes.
// The longest road is defined as the longest path within the network that doesn’t use an edge twice.
// Nodes may be visited more than once, though.
// Input
// The input file will contain one or more test cases.
// The first line of each test case contains two integers: the number of nodes n (2 ≤ n ≤ 25) and the
// number of edges m (1 ≤ m ≤ 25). The next m lines describe the m edges. Each edge is given by the
// numbers of the two nodes connected by it. Nodes are numbered from 0 to n − 1. Edges are undirected.
// Nodes have degrees of three or less. The network is not neccessarily connected.
// Input will be terminated by two values of 0 for n and m.
// Output
// For each test case, print the length of the longest road on a single line.
// Sample Input
// 3 2
// 0 1
// 1 2
// 15 16
// 0 2
// 1 2
// 2 3
// 3 4
// 3 5
// 4 6
// 5 7
// 6 8
// 7 8
// 7 9
// 8 10
// 9 11
// 10 12
// 11 12
// 10 13
// 12 14
// 0 0
// Sample Output
// 2
// 12
import java.io.*;
/**
* Created by kdn251 on 2/20/17.
*/
public class TheSettlersOfCatan {
public static int[][] matrix = new int[30][30];
public static int answer;
public static void main(String args[]) throws Exception {
//initialize buffered reader
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String line;
//iterate while current line is not equal to 0 0
while(!(line = br.readLine()).equals("0 0")) {
//initialize number of nodes and edges
int nodes = Integer.parseInt(line.split(" ")[0]);
int edges = Integer.parseInt(line.split(" ")[1]);
//iterate through all edges
for(int i = 0; i < edges; i++) {
//get edge<SUF>
String[] current = br.readLine().split(" ");
int x = Integer.parseInt(current[0]);
int y = Integer.parseInt(current[1]);
//mark edge
matrix[x][y] = 1;
matrix[y][x] = 1;
}
//initialize answer to zero
answer = 0;
//dfs on every node
for(int i = 0; i < nodes; i++) {
dfs(i, 0, nodes);
}
//print answer
System.out.println(answer);
//reset graph
matrix = new int[30][30];
}
}
public static void dfs(int nd, int l, int nodes) {
//update answer if l is larger than current answer
if(l > answer) {
answer = l;
}
for(int i = 0; i < nodes; i++) {
if(matrix[nd][i] > 0) {
//ensure that edge is not counted twice (like marking as "visited")
matrix[nd][i] = 0;
matrix[i][nd] = 0;
//continue traversing graph and add 1 to count
dfs(i, l + 1, nodes);
//set current edge again in case node further into graph can reach it
matrix[nd][i] = 1;
matrix[i][nd] = 1;
}
}
}
}
//source: https://github.com/morris821028/UVa/blob/master/volume005/539%20-%20The%20Settlers%20of%20Catan.cpp
|
93_1 | package com.thealgorithms.sorts;
/**
* Comb Sort algorithm implementation
*
* <p>
* Best-case performance O(n * log(n)) Worst-case performance O(n ^ 2)
* Worst-case space complexity O(1)
*
* <p>
* Comb sort improves on bubble sort.
*
* @author Sandeep Roy (https://github.com/sandeeproy99)
* @author Podshivalov Nikita (https://github.com/nikitap492)
* @see BubbleSort
* @see SortAlgorithm
*/
class CombSort implements SortAlgorithm {
// To find gap between elements
private int nextGap(int gap) {
// Shrink gap by Shrink factor
gap = (gap * 10) / 13;
return Math.max(gap, 1);
}
/**
* Function to sort arr[] using Comb
*
* @param arr - an array should be sorted
* @return sorted array
*/
@Override
public <T extends Comparable<T>> T[] sort(T[] arr) {
int size = arr.length;
// initialize gap
int gap = size;
// Initialize swapped as true to make sure that loop runs
boolean swapped = true;
// Keep running while gap is more than 1 and last iteration caused a swap
while (gap != 1 || swapped) {
// Find next gap
gap = nextGap(gap);
// Initialize swapped as false so that we can check if swap happened or not
swapped = false;
// Compare all elements with current gap
for (int i = 0; i < size - gap; i++) {
if (SortUtils.less(arr[i + gap], arr[i])) {
// Swap arr[i] and arr[i+gap]
SortUtils.swap(arr, i, i + gap);
swapped = true;
}
}
}
return arr;
}
// Driver method
public static void main(String[] args) {
CombSort ob = new CombSort();
Integer[] arr = {
8,
4,
1,
56,
3,
-44,
-1,
0,
36,
34,
8,
12,
-66,
-78,
23,
-6,
28,
0,
};
ob.sort(arr);
System.out.println("sorted array");
SortUtils.print(arr);
}
}
| TheAlgorithms/Java | src/main/java/com/thealgorithms/sorts/CombSort.java | 632 | // To find gap between elements | line_comment | nl | package com.thealgorithms.sorts;
/**
* Comb Sort algorithm implementation
*
* <p>
* Best-case performance O(n * log(n)) Worst-case performance O(n ^ 2)
* Worst-case space complexity O(1)
*
* <p>
* Comb sort improves on bubble sort.
*
* @author Sandeep Roy (https://github.com/sandeeproy99)
* @author Podshivalov Nikita (https://github.com/nikitap492)
* @see BubbleSort
* @see SortAlgorithm
*/
class CombSort implements SortAlgorithm {
// To find<SUF>
private int nextGap(int gap) {
// Shrink gap by Shrink factor
gap = (gap * 10) / 13;
return Math.max(gap, 1);
}
/**
* Function to sort arr[] using Comb
*
* @param arr - an array should be sorted
* @return sorted array
*/
@Override
public <T extends Comparable<T>> T[] sort(T[] arr) {
int size = arr.length;
// initialize gap
int gap = size;
// Initialize swapped as true to make sure that loop runs
boolean swapped = true;
// Keep running while gap is more than 1 and last iteration caused a swap
while (gap != 1 || swapped) {
// Find next gap
gap = nextGap(gap);
// Initialize swapped as false so that we can check if swap happened or not
swapped = false;
// Compare all elements with current gap
for (int i = 0; i < size - gap; i++) {
if (SortUtils.less(arr[i + gap], arr[i])) {
// Swap arr[i] and arr[i+gap]
SortUtils.swap(arr, i, i + gap);
swapped = true;
}
}
}
return arr;
}
// Driver method
public static void main(String[] args) {
CombSort ob = new CombSort();
Integer[] arr = {
8,
4,
1,
56,
3,
-44,
-1,
0,
36,
34,
8,
12,
-66,
-78,
23,
-6,
28,
0,
};
ob.sort(arr);
System.out.println("sorted array");
SortUtils.print(arr);
}
}
|
99_7 | package com.thealgorithms.others;
import java.util.Objects;
/**
* The Verhoeff algorithm is a checksum formula for error detection developed by
* the Dutch mathematician Jacobus Verhoeff and was first published in 1969. It
* was the first decimal check digit algorithm which detects all single-digit
* errors, and all transposition errors involving two adjacent digits.
*
* <p>
* The strengths of the algorithm are that it detects all transliteration and
* transposition errors, and additionally most twin, twin jump, jump
* transposition and phonetic errors. The main weakness of the Verhoeff
* algorithm is its complexity. The calculations required cannot easily be
* expressed as a formula. For easy calculation three tables are required:</p>
* <ol>
* <li>multiplication table</li>
* <li>inverse table</li>
* <li>permutation table</li>
* </ol>
*
* @see <a href="https://en.wikipedia.org/wiki/Verhoeff_algorithm">Wiki.
* Verhoeff algorithm</a>
*/
public final class Verhoeff {
private Verhoeff() {
}
/**
* Table {@code d}. Based on multiplication in the dihedral group D5 and is
* simply the Cayley table of the group. Note that this group is not
* commutative, that is, for some values of {@code j} and {@code k},
* {@code d(j,k) ≠ d(k, j)}.
*
* @see <a href="https://en.wikipedia.org/wiki/Dihedral_group">Wiki.
* Dihedral group</a>
*/
private static final byte[][] MULTIPLICATION_TABLE = {
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
{1, 2, 3, 4, 0, 6, 7, 8, 9, 5},
{2, 3, 4, 0, 1, 7, 8, 9, 5, 6},
{3, 4, 0, 1, 2, 8, 9, 5, 6, 7},
{4, 0, 1, 2, 3, 9, 5, 6, 7, 8},
{5, 9, 8, 7, 6, 0, 4, 3, 2, 1},
{6, 5, 9, 8, 7, 1, 0, 4, 3, 2},
{7, 6, 5, 9, 8, 2, 1, 0, 4, 3},
{8, 7, 6, 5, 9, 3, 2, 1, 0, 4},
{9, 8, 7, 6, 5, 4, 3, 2, 1, 0},
};
/**
* The inverse table {@code inv}. Represents the multiplicative inverse of a
* digit, that is, the value that satisfies {@code d(j, inv(j)) = 0}.
*/
private static final byte[] MULTIPLICATIVE_INVERSE = {
0,
4,
3,
2,
1,
5,
6,
7,
8,
9,
};
/**
* The permutation table {@code p}. Applies a permutation to each digit
* based on its position in the number. This is actually a single
* permutation {@code (1 5 8 9 4 2 7 0)(3 6)} applied iteratively; i.e.
* {@code p(i+j,n) = p(i, p(j,n))}.
*/
private static final byte[][] PERMUTATION_TABLE = {
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
{1, 5, 7, 6, 2, 8, 3, 0, 9, 4},
{5, 8, 0, 3, 7, 9, 6, 1, 4, 2},
{8, 9, 1, 6, 0, 4, 3, 5, 2, 7},
{9, 4, 5, 3, 1, 2, 6, 8, 7, 0},
{4, 2, 8, 6, 5, 7, 3, 9, 0, 1},
{2, 7, 9, 3, 8, 0, 6, 4, 1, 5},
{7, 0, 4, 6, 9, 1, 3, 2, 5, 8},
};
/**
* Check input digits by Verhoeff algorithm.
*
* @param digits input to check
* @return true if check was successful, false otherwise
* @throws IllegalArgumentException if input parameter contains not only
* digits
* @throws NullPointerException if input is null
*/
public static boolean verhoeffCheck(String digits) {
checkInput(digits);
int[] numbers = toIntArray(digits);
// The Verhoeff algorithm
int checksum = 0;
for (int i = 0; i < numbers.length; i++) {
int index = numbers.length - i - 1;
byte b = PERMUTATION_TABLE[i % 8][numbers[index]];
checksum = MULTIPLICATION_TABLE[checksum][b];
}
return checksum == 0;
}
/**
* Calculate check digit for initial digits and add it tho the last
* position.
*
* @param initialDigits initial value
* @return digits with the checksum in the last position
* @throws IllegalArgumentException if input parameter contains not only
* digits
* @throws NullPointerException if input is null
*/
public static String addVerhoeffChecksum(String initialDigits) {
checkInput(initialDigits);
// Add zero to end of input value
var modifiedDigits = initialDigits + "0";
int[] numbers = toIntArray(modifiedDigits);
int checksum = 0;
for (int i = 0; i < numbers.length; i++) {
int index = numbers.length - i - 1;
byte b = PERMUTATION_TABLE[i % 8][numbers[index]];
checksum = MULTIPLICATION_TABLE[checksum][b];
}
checksum = MULTIPLICATIVE_INVERSE[checksum];
return initialDigits + checksum;
}
public static void main(String[] args) {
System.out.println("Verhoeff algorithm usage examples:");
var validInput = "2363";
var invalidInput = "2364";
checkAndPrint(validInput);
checkAndPrint(invalidInput);
System.out.println("\nCheck digit generation example:");
var input = "236";
generateAndPrint(input);
}
private static void checkAndPrint(String input) {
String validationResult = Verhoeff.verhoeffCheck(input) ? "valid" : "not valid";
System.out.println("Input '" + input + "' is " + validationResult);
}
private static void generateAndPrint(String input) {
String result = addVerhoeffChecksum(input);
System.out.println("Generate and add checksum to initial value '" + input + "'. Result: '" + result + "'");
}
private static void checkInput(String input) {
Objects.requireNonNull(input);
if (!input.matches("\\d+")) {
throw new IllegalArgumentException("Input '" + input + "' contains not only digits");
}
}
private static int[] toIntArray(String string) {
return string.chars().map(i -> Character.digit(i, 10)).toArray();
}
}
| TheAlgorithms/Java | src/main/java/com/thealgorithms/others/Verhoeff.java | 1,958 | // Add zero to end of input value | line_comment | nl | package com.thealgorithms.others;
import java.util.Objects;
/**
* The Verhoeff algorithm is a checksum formula for error detection developed by
* the Dutch mathematician Jacobus Verhoeff and was first published in 1969. It
* was the first decimal check digit algorithm which detects all single-digit
* errors, and all transposition errors involving two adjacent digits.
*
* <p>
* The strengths of the algorithm are that it detects all transliteration and
* transposition errors, and additionally most twin, twin jump, jump
* transposition and phonetic errors. The main weakness of the Verhoeff
* algorithm is its complexity. The calculations required cannot easily be
* expressed as a formula. For easy calculation three tables are required:</p>
* <ol>
* <li>multiplication table</li>
* <li>inverse table</li>
* <li>permutation table</li>
* </ol>
*
* @see <a href="https://en.wikipedia.org/wiki/Verhoeff_algorithm">Wiki.
* Verhoeff algorithm</a>
*/
public final class Verhoeff {
private Verhoeff() {
}
/**
* Table {@code d}. Based on multiplication in the dihedral group D5 and is
* simply the Cayley table of the group. Note that this group is not
* commutative, that is, for some values of {@code j} and {@code k},
* {@code d(j,k) ≠ d(k, j)}.
*
* @see <a href="https://en.wikipedia.org/wiki/Dihedral_group">Wiki.
* Dihedral group</a>
*/
private static final byte[][] MULTIPLICATION_TABLE = {
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
{1, 2, 3, 4, 0, 6, 7, 8, 9, 5},
{2, 3, 4, 0, 1, 7, 8, 9, 5, 6},
{3, 4, 0, 1, 2, 8, 9, 5, 6, 7},
{4, 0, 1, 2, 3, 9, 5, 6, 7, 8},
{5, 9, 8, 7, 6, 0, 4, 3, 2, 1},
{6, 5, 9, 8, 7, 1, 0, 4, 3, 2},
{7, 6, 5, 9, 8, 2, 1, 0, 4, 3},
{8, 7, 6, 5, 9, 3, 2, 1, 0, 4},
{9, 8, 7, 6, 5, 4, 3, 2, 1, 0},
};
/**
* The inverse table {@code inv}. Represents the multiplicative inverse of a
* digit, that is, the value that satisfies {@code d(j, inv(j)) = 0}.
*/
private static final byte[] MULTIPLICATIVE_INVERSE = {
0,
4,
3,
2,
1,
5,
6,
7,
8,
9,
};
/**
* The permutation table {@code p}. Applies a permutation to each digit
* based on its position in the number. This is actually a single
* permutation {@code (1 5 8 9 4 2 7 0)(3 6)} applied iteratively; i.e.
* {@code p(i+j,n) = p(i, p(j,n))}.
*/
private static final byte[][] PERMUTATION_TABLE = {
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
{1, 5, 7, 6, 2, 8, 3, 0, 9, 4},
{5, 8, 0, 3, 7, 9, 6, 1, 4, 2},
{8, 9, 1, 6, 0, 4, 3, 5, 2, 7},
{9, 4, 5, 3, 1, 2, 6, 8, 7, 0},
{4, 2, 8, 6, 5, 7, 3, 9, 0, 1},
{2, 7, 9, 3, 8, 0, 6, 4, 1, 5},
{7, 0, 4, 6, 9, 1, 3, 2, 5, 8},
};
/**
* Check input digits by Verhoeff algorithm.
*
* @param digits input to check
* @return true if check was successful, false otherwise
* @throws IllegalArgumentException if input parameter contains not only
* digits
* @throws NullPointerException if input is null
*/
public static boolean verhoeffCheck(String digits) {
checkInput(digits);
int[] numbers = toIntArray(digits);
// The Verhoeff algorithm
int checksum = 0;
for (int i = 0; i < numbers.length; i++) {
int index = numbers.length - i - 1;
byte b = PERMUTATION_TABLE[i % 8][numbers[index]];
checksum = MULTIPLICATION_TABLE[checksum][b];
}
return checksum == 0;
}
/**
* Calculate check digit for initial digits and add it tho the last
* position.
*
* @param initialDigits initial value
* @return digits with the checksum in the last position
* @throws IllegalArgumentException if input parameter contains not only
* digits
* @throws NullPointerException if input is null
*/
public static String addVerhoeffChecksum(String initialDigits) {
checkInput(initialDigits);
// Add zero<SUF>
var modifiedDigits = initialDigits + "0";
int[] numbers = toIntArray(modifiedDigits);
int checksum = 0;
for (int i = 0; i < numbers.length; i++) {
int index = numbers.length - i - 1;
byte b = PERMUTATION_TABLE[i % 8][numbers[index]];
checksum = MULTIPLICATION_TABLE[checksum][b];
}
checksum = MULTIPLICATIVE_INVERSE[checksum];
return initialDigits + checksum;
}
public static void main(String[] args) {
System.out.println("Verhoeff algorithm usage examples:");
var validInput = "2363";
var invalidInput = "2364";
checkAndPrint(validInput);
checkAndPrint(invalidInput);
System.out.println("\nCheck digit generation example:");
var input = "236";
generateAndPrint(input);
}
private static void checkAndPrint(String input) {
String validationResult = Verhoeff.verhoeffCheck(input) ? "valid" : "not valid";
System.out.println("Input '" + input + "' is " + validationResult);
}
private static void generateAndPrint(String input) {
String result = addVerhoeffChecksum(input);
System.out.println("Generate and add checksum to initial value '" + input + "'. Result: '" + result + "'");
}
private static void checkInput(String input) {
Objects.requireNonNull(input);
if (!input.matches("\\d+")) {
throw new IllegalArgumentException("Input '" + input + "' contains not only digits");
}
}
private static int[] toIntArray(String string) {
return string.chars().map(i -> Character.digit(i, 10)).toArray();
}
}
|
315_124 | "// ASM: a very small and fast Java bytecode manipulation framework\n// Copyright (c) 2000-2011 INRI(...TRUNCATED) | spring-projects/spring-framework | spring-core/src/main/java/org/springframework/asm/Label.java | 7,954 | // Overridden Object methods | line_comment | nl | "// ASM: a very small and fast Java bytecode manipulation framework\n// Copyright (c) 2000-2011 INRI(...TRUNCATED) |
346_0 | "///usr/bin/env jbang \"$0\" \"$@\" ; exit $?\n// //DEPS <dependency1> <dependency2>\n\nimport stati(...TRUNCATED) | eugenp/tutorials | jbang/hello.java | 70 | ///usr/bin/env jbang "$0" "$@" ; exit $? | line_comment | nl | "///usr/bin/env jbang<SUF>\n// //DEPS <dependency1> <dependency2>\n\nimport static java.lang.System.(...TRUNCATED) |
404_9 | "/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.\n\nLicensed under the Apache License(...TRUNCATED) | tensorflow/tensorflow | tensorflow/lite/java/src/main/java/org/tensorflow/lite/DataType.java | 544 | // Boolean size is JVM-dependent. | line_comment | nl | "/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.\n\nLicensed under the Apache License(...TRUNCATED) |
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