8226297: Dual-pivot quicksort improvements
Reviewed-by: dl, lbourges
Contributed-by: Vladimir Yaroslavskiy <vlv.spb.ru@mail.ru>
/*
* Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @compile/module=java.base java/util/SortingHelper.java
* @bug 6880672 6896573 6899694 6976036 7013585 7018258 8003981 8226297
* @build Sorting
* @run main Sorting -shortrun
* @summary Exercise Arrays.sort, Arrays.parallelSort
*
* @author Vladimir Yaroslavskiy
* @author Jon Bentley
* @author Josh Bloch
*/
import java.io.PrintStream;
import java.util.Comparator;
import java.util.Random;
import java.util.SortingHelper;
public class Sorting {
private static final PrintStream out = System.out;
private static final PrintStream err = System.err;
// Array lengths used in a long run (default)
private static final int[] LONG_RUN_LENGTHS = {
1, 3, 8, 21, 55, 100, 1_000, 10_000, 100_000 };
// Array lengths used in a short run
private static final int[] SHORT_RUN_LENGTHS = {
1, 8, 55, 100, 10_000 };
// Random initial values used in a long run (default)
private static final TestRandom[] LONG_RUN_RANDOMS = {
TestRandom.BABA, TestRandom.DEDA, TestRandom.C0FFEE };
// Random initial values used in a short run
private static final TestRandom[] SHORT_RUN_RANDOMS = {
TestRandom.C0FFEE };
// Constants used in subarray sorting
private static final int A380 = 0xA380;
private static final int B747 = 0xB747;
private final SortingHelper sortingHelper;
private final TestRandom[] randoms;
private final int[] lengths;
private Object[] gold;
private Object[] test;
public static void main(String[] args) {
long start = System.currentTimeMillis();
boolean shortRun = args.length > 0 && args[0].equals("-shortrun");
int[] lengths = shortRun ? SHORT_RUN_LENGTHS : LONG_RUN_LENGTHS;
TestRandom[] randoms = shortRun ? SHORT_RUN_RANDOMS : LONG_RUN_RANDOMS;
new Sorting(SortingHelper.DUAL_PIVOT_QUICKSORT, randoms, lengths).testCore();
new Sorting(SortingHelper.PARALLEL_SORT, randoms, lengths).testCore();
new Sorting(SortingHelper.HEAP_SORT, randoms, lengths).testBasic();
new Sorting(SortingHelper.ARRAYS_SORT, randoms, lengths).testAll();
new Sorting(SortingHelper.ARRAYS_PARALLEL_SORT, randoms, lengths).testAll();
long end = System.currentTimeMillis();
out.format("PASSED in %d sec.\n", (end - start) / 1000);
}
private Sorting(SortingHelper sortingHelper, TestRandom[] randoms, int[] lengths) {
this.sortingHelper = sortingHelper;
this.randoms = randoms;
this.lengths = lengths;
}
private void testBasic() {
testEmptyArray();
for (int length : lengths) {
createData(length);
testBasic(length);
}
}
private void testBasic(int length) {
for (TestRandom random : randoms) {
testWithInsertionSort(length, random);
testWithCheckSum(length, random);
testWithScrambling(length, random);
}
}
private void testCore() {
for (int length : lengths) {
createData(length);
testCore(length);
}
}
private void testCore(int length) {
testBasic(length);
for (TestRandom random : randoms) {
testMergingSort(length, random);
testSubArray(length, random);
testNegativeZero(length, random);
testFloatingPointSorting(length, random);
}
}
private void testAll() {
for (int length : lengths) {
createData(length);
testAll(length);
}
}
private void testAll(int length) {
testCore(length);
for (TestRandom random : randoms) {
testRange(length, random);
testStability(length, random);
}
}
private void testEmptyArray() {
testEmptyAndNullIntArray();
testEmptyAndNullLongArray();
testEmptyAndNullByteArray();
testEmptyAndNullCharArray();
testEmptyAndNullShortArray();
testEmptyAndNullFloatArray();
testEmptyAndNullDoubleArray();
}
private void testStability(int length, TestRandom random) {
printTestName("Test stability", random, length);
Pair[] a = build(length, random);
sortingHelper.sort(a);
checkSorted(a);
checkStable(a);
a = build(length, random);
sortingHelper.sort(a, pairComparator);
checkSorted(a);
checkStable(a);
out.println();
}
private void testEmptyAndNullIntArray() {
sortingHelper.sort(new int[] {});
sortingHelper.sort(new int[] {}, 0, 0);
try {
sortingHelper.sort(null);
} catch (NullPointerException expected) {
try {
sortingHelper.sort(null, 0, 0);
} catch (NullPointerException expected2) {
return;
}
fail(sortingHelper + "(int[],fromIndex,toIndex) shouldn't " +
"catch null array");
}
fail(sortingHelper + "(int[]) shouldn't catch null array");
}
private void testEmptyAndNullLongArray() {
sortingHelper.sort(new long[] {});
sortingHelper.sort(new long[] {}, 0, 0);
try {
sortingHelper.sort(null);
} catch (NullPointerException expected) {
try {
sortingHelper.sort(null, 0, 0);
} catch (NullPointerException expected2) {
return;
}
fail(sortingHelper + "(long[],fromIndex,toIndex) shouldn't " +
"catch null array");
}
fail(sortingHelper + "(long[]) shouldn't catch null array");
}
private void testEmptyAndNullByteArray() {
sortingHelper.sort(new byte[] {});
sortingHelper.sort(new byte[] {}, 0, 0);
try {
sortingHelper.sort(null);
} catch (NullPointerException expected) {
try {
sortingHelper.sort(null, 0, 0);
} catch (NullPointerException expected2) {
return;
}
fail(sortingHelper + "(byte[],fromIndex,toIndex) shouldn't " +
"catch null array");
}
fail(sortingHelper + "(byte[]) shouldn't catch null array");
}
private void testEmptyAndNullCharArray() {
sortingHelper.sort(new char[] {});
sortingHelper.sort(new char[] {}, 0, 0);
try {
sortingHelper.sort(null);
} catch (NullPointerException expected) {
try {
sortingHelper.sort(null, 0, 0);
} catch (NullPointerException expected2) {
return;
}
fail(sortingHelper + "(char[],fromIndex,toIndex) shouldn't " +
"catch null array");
}
fail(sortingHelper + "(char[]) shouldn't catch null array");
}
private void testEmptyAndNullShortArray() {
sortingHelper.sort(new short[] {});
sortingHelper.sort(new short[] {}, 0, 0);
try {
sortingHelper.sort(null);
} catch (NullPointerException expected) {
try {
sortingHelper.sort(null, 0, 0);
} catch (NullPointerException expected2) {
return;
}
fail(sortingHelper + "(short[],fromIndex,toIndex) shouldn't " +
"catch null array");
}
fail(sortingHelper + "(short[]) shouldn't catch null array");
}
private void testEmptyAndNullFloatArray() {
sortingHelper.sort(new float[] {});
sortingHelper.sort(new float[] {}, 0, 0);
try {
sortingHelper.sort(null);
} catch (NullPointerException expected) {
try {
sortingHelper.sort(null, 0, 0);
} catch (NullPointerException expected2) {
return;
}
fail(sortingHelper + "(float[],fromIndex,toIndex) shouldn't " +
"catch null array");
}
fail(sortingHelper + "(float[]) shouldn't catch null array");
}
private void testEmptyAndNullDoubleArray() {
sortingHelper.sort(new double[] {});
sortingHelper.sort(new double[] {}, 0, 0);
try {
sortingHelper.sort(null);
} catch (NullPointerException expected) {
try {
sortingHelper.sort(null, 0, 0);
} catch (NullPointerException expected2) {
return;
}
fail(sortingHelper + "(double[],fromIndex,toIndex) shouldn't " +
"catch null array");
}
fail(sortingHelper + "(double[]) shouldn't catch null array");
}
private void testSubArray(int length, TestRandom random) {
if (length < 4) {
return;
}
for (int m = 1; m < length / 2; m <<= 1) {
int fromIndex = m;
int toIndex = length - m;
prepareSubArray((int[]) gold[0], fromIndex, toIndex);
convertData(length);
for (int i = 0; i < test.length; i++) {
printTestName("Test subarray", random, length,
", m = " + m + ", " + getType(i));
sortingHelper.sort(test[i], fromIndex, toIndex);
checkSubArray(test[i], fromIndex, toIndex);
}
}
out.println();
}
private void testRange(int length, TestRandom random) {
if (length < 2) {
return;
}
for (int m = 1; m < length; m <<= 1) {
for (int i = 1; i <= length; i++) {
((int[]) gold[0]) [i - 1] = i % m + m % i;
}
convertData(length);
for (int i = 0; i < test.length; i++) {
printTestName("Test range check", random, length,
", m = " + m + ", " + getType(i));
checkRange(test[i], m);
}
}
out.println();
}
private void checkSorted(Pair[] a) {
for (int i = 0; i < a.length - 1; i++) {
if (a[i].getKey() > a[i + 1].getKey()) {
fail("Array is not sorted at " + i + "-th position: " +
a[i].getKey() + " and " + a[i + 1].getKey());
}
}
}
private void checkStable(Pair[] a) {
for (int i = 0; i < a.length / 4; ) {
int key1 = a[i].getKey();
int value1 = a[i++].getValue();
int key2 = a[i].getKey();
int value2 = a[i++].getValue();
int key3 = a[i].getKey();
int value3 = a[i++].getValue();
int key4 = a[i].getKey();
int value4 = a[i++].getValue();
if (!(key1 == key2 && key2 == key3 && key3 == key4)) {
fail("Keys are different " + key1 + ", " + key2 + ", " +
key3 + ", " + key4 + " at position " + i);
}
if (!(value1 < value2 && value2 < value3 && value3 < value4)) {
fail("Sorting is not stable at position " + i +
". Second values have been changed: " + value1 + ", " +
value2 + ", " + value3 + ", " + value4);
}
}
}
private Pair[] build(int length, Random random) {
Pair[] a = new Pair[length * 4];
for (int i = 0; i < a.length; ) {
int key = random.nextInt();
a[i++] = new Pair(key, 1);
a[i++] = new Pair(key, 2);
a[i++] = new Pair(key, 3);
a[i++] = new Pair(key, 4);
}
return a;
}
private void testWithInsertionSort(int length, TestRandom random) {
if (length > 1000) {
return;
}
for (int m = 1; m <= length; m <<= 1) {
for (UnsortedBuilder builder : UnsortedBuilder.values()) {
builder.build((int[]) gold[0], m, random);
convertData(length);
for (int i = 0; i < test.length; i++) {
printTestName("Test with insertion sort", random, length,
", m = " + m + ", " + getType(i) + " " + builder);
sortingHelper.sort(test[i]);
sortByInsertionSort(gold[i]);
compare(test[i], gold[i]);
}
}
}
out.println();
}
private void testMergingSort(int length, TestRandom random) {
if (length < (4 << 10)) { // DualPivotQuicksort.MIN_TRY_MERGE_SIZE
return;
}
final int PERIOD = 50;
for (int m = PERIOD - 2; m <= PERIOD + 2; m++) {
for (MergingBuilder builder : MergingBuilder.values()) {
builder.build((int[]) gold[0], m);
convertData(length);
for (int i = 0; i < test.length; i++) {
printTestName("Test merging sort", random, length,
", m = " + m + ", " + getType(i) + " " + builder);
sortingHelper.sort(test[i]);
checkSorted(test[i]);
}
}
}
out.println();
}
private void testWithCheckSum(int length, TestRandom random) {
for (int m = 1; m <= length; m <<= 1) {
for (UnsortedBuilder builder : UnsortedBuilder.values()) {
builder.build((int[]) gold[0], m, random);
convertData(length);
for (int i = 0; i < test.length; i++) {
printTestName("Test with check sum", random, length,
", m = " + m + ", " + getType(i) + " " + builder);
sortingHelper.sort(test[i]);
checkWithCheckSum(test[i], gold[i]);
}
}
}
out.println();
}
private void testWithScrambling(int length, TestRandom random) {
for (int m = 1; m <= length; m <<= 1) {
for (SortedBuilder builder : SortedBuilder.values()) {
builder.build((int[]) gold[0], m);
convertData(length);
for (int i = 0; i < test.length; i++) {
printTestName("Test with scrambling", random, length,
", m = " + m + ", " + getType(i) + " " + builder);
scramble(test[i], random);
sortingHelper.sort(test[i]);
compare(test[i], gold[i]);
}
}
}
out.println();
}
private void testNegativeZero(int length, TestRandom random) {
for (int i = 5; i < test.length; i++) {
printTestName("Test negative zero -0.0", random, length, " " + getType(i));
NegativeZeroBuilder builder = NegativeZeroBuilder.values() [i - 5];
builder.build(test[i], random);
sortingHelper.sort(test[i]);
checkNegativeZero(test[i]);
}
out.println();
}
private void testFloatingPointSorting(int length, TestRandom random) {
if (length < 2) {
return;
}
final int MAX = 13;
for (int a = 0; a < MAX; a++) {
for (int g = 0; g < MAX; g++) {
for (int z = 0; z < MAX; z++) {
for (int n = 0; n < MAX; n++) {
for (int p = 0; p < MAX; p++) {
if (a + g + z + n + p != length) {
continue;
}
for (int i = 5; i < test.length; i++) {
printTestName("Test float-pointing sorting", random, length,
", a = " + a + ", g = " + g + ", z = " + z +
", n = " + n + ", p = " + p + ", " + getType(i));
FloatingPointBuilder builder = FloatingPointBuilder.values()[i - 5];
builder.build(gold[i], a, g, z, n, p, random);
copy(test[i], gold[i]);
scramble(test[i], random);
sortingHelper.sort(test[i]);
compare(test[i], gold[i], a, n, g);
}
}
}
}
}
}
for (int m = 13; m > 4; m--) {
int t = length / m;
int g = t, z = t, n = t, p = t;
int a = length - g - z - n - p;
for (int i = 5; i < test.length; i++) {
printTestName("Test float-pointing sorting", random, length,
", a = " + a + ", g = " + g + ", z = " + z +
", n = " + n + ", p = " + p + ", " + getType(i));
FloatingPointBuilder builder = FloatingPointBuilder.values() [i - 5];
builder.build(gold[i], a, g, z, n, p, random);
copy(test[i], gold[i]);
scramble(test[i], random);
sortingHelper.sort(test[i]);
compare(test[i], gold[i], a, n, g);
}
}
out.println();
}
private void prepareSubArray(int[] a, int fromIndex, int toIndex) {
for (int i = 0; i < fromIndex; i++) {
a[i] = A380;
}
int middle = (fromIndex + toIndex) >>> 1;
int k = 0;
for (int i = fromIndex; i < middle; i++) {
a[i] = k++;
}
for (int i = middle; i < toIndex; i++) {
a[i] = k--;
}
for (int i = toIndex; i < a.length; i++) {
a[i] = B747;
}
}
private void scramble(Object a, Random random) {
if (a instanceof int[]) {
scramble((int[]) a, random);
} else if (a instanceof long[]) {
scramble((long[]) a, random);
} else if (a instanceof byte[]) {
scramble((byte[]) a, random);
} else if (a instanceof char[]) {
scramble((char[]) a, random);
} else if (a instanceof short[]) {
scramble((short[]) a, random);
} else if (a instanceof float[]) {
scramble((float[]) a, random);
} else if (a instanceof double[]) {
scramble((double[]) a, random);
} else {
fail("Unknown type of array: " + a.getClass().getName());
}
}
private void scramble(int[] a, Random random) {
for (int i = 0; i < a.length * 7; i++) {
swap(a, random.nextInt(a.length), random.nextInt(a.length));
}
}
private void scramble(long[] a, Random random) {
for (int i = 0; i < a.length * 7; i++) {
swap(a, random.nextInt(a.length), random.nextInt(a.length));
}
}
private void scramble(byte[] a, Random random) {
for (int i = 0; i < a.length * 7; i++) {
swap(a, random.nextInt(a.length), random.nextInt(a.length));
}
}
private void scramble(char[] a, Random random) {
for (int i = 0; i < a.length * 7; i++) {
swap(a, random.nextInt(a.length), random.nextInt(a.length));
}
}
private void scramble(short[] a, Random random) {
for (int i = 0; i < a.length * 7; i++) {
swap(a, random.nextInt(a.length), random.nextInt(a.length));
}
}
private void scramble(float[] a, Random random) {
for (int i = 0; i < a.length * 7; i++) {
swap(a, random.nextInt(a.length), random.nextInt(a.length));
}
}
private void scramble(double[] a, Random random) {
for (int i = 0; i < a.length * 7; i++) {
swap(a, random.nextInt(a.length), random.nextInt(a.length));
}
}
private void swap(int[] a, int i, int j) {
int t = a[i]; a[i] = a[j]; a[j] = t;
}
private void swap(long[] a, int i, int j) {
long t = a[i]; a[i] = a[j]; a[j] = t;
}
private void swap(byte[] a, int i, int j) {
byte t = a[i]; a[i] = a[j]; a[j] = t;
}
private void swap(char[] a, int i, int j) {
char t = a[i]; a[i] = a[j]; a[j] = t;
}
private void swap(short[] a, int i, int j) {
short t = a[i]; a[i] = a[j]; a[j] = t;
}
private void swap(float[] a, int i, int j) {
float t = a[i]; a[i] = a[j]; a[j] = t;
}
private void swap(double[] a, int i, int j) {
double t = a[i]; a[i] = a[j]; a[j] = t;
}
private void checkWithCheckSum(Object test, Object gold) {
checkSorted(test);
checkCheckSum(test, gold);
}
private void fail(String message) {
err.format("\n*** TEST FAILED ***\n\n%s\n\n", message);
throw new RuntimeException("Test failed");
}
private void checkNegativeZero(Object a) {
if (a instanceof float[]) {
checkNegativeZero((float[]) a);
} else if (a instanceof double[]) {
checkNegativeZero((double[]) a);
} else {
fail("Unknown type of array: " + a.getClass().getName());
}
}
private void checkNegativeZero(float[] a) {
for (int i = 0; i < a.length - 1; i++) {
if (Float.floatToRawIntBits(a[i]) == 0 && Float.floatToRawIntBits(a[i + 1]) < 0) {
fail(a[i] + " before " + a[i + 1] + " at position " + i);
}
}
}
private void checkNegativeZero(double[] a) {
for (int i = 0; i < a.length - 1; i++) {
if (Double.doubleToRawLongBits(a[i]) == 0 && Double.doubleToRawLongBits(a[i + 1]) < 0) {
fail(a[i] + " before " + a[i + 1] + " at position " + i);
}
}
}
private void compare(Object a, Object b, int numNaN, int numNeg, int numNegZero) {
if (a instanceof float[]) {
compare((float[]) a, (float[]) b, numNaN, numNeg, numNegZero);
} else if (a instanceof double[]) {
compare((double[]) a, (double[]) b, numNaN, numNeg, numNegZero);
} else {
fail("Unknown type of array: " + a.getClass().getName());
}
}
private void compare(float[] a, float[] b, int numNaN, int numNeg, int numNegZero) {
for (int i = a.length - numNaN; i < a.length; i++) {
if (a[i] == a[i]) {
fail("There must be NaN instead of " + a[i] + " at position " + i);
}
}
final int NEGATIVE_ZERO = Float.floatToIntBits(-0.0f);
for (int i = numNeg; i < numNeg + numNegZero; i++) {
if (NEGATIVE_ZERO != Float.floatToIntBits(a[i])) {
fail("There must be -0.0 instead of " + a[i] + " at position " + i);
}
}
for (int i = 0; i < a.length - numNaN; i++) {
if (a[i] != b[i]) {
fail("There must be " + b[i] + " instead of " + a[i] + " at position " + i);
}
}
}
private void compare(double[] a, double[] b, int numNaN, int numNeg, int numNegZero) {
for (int i = a.length - numNaN; i < a.length; i++) {
if (a[i] == a[i]) {
fail("There must be NaN instead of " + a[i] + " at position " + i);
}
}
final long NEGATIVE_ZERO = Double.doubleToLongBits(-0.0d);
for (int i = numNeg; i < numNeg + numNegZero; i++) {
if (NEGATIVE_ZERO != Double.doubleToLongBits(a[i])) {
fail("There must be -0.0 instead of " + a[i] + " at position " + i);
}
}
for (int i = 0; i < a.length - numNaN; i++) {
if (a[i] != b[i]) {
fail("There must be " + b[i] + " instead of " + a[i] + " at position " + i);
}
}
}
private void compare(Object a, Object b) {
if (a instanceof int[]) {
compare((int[]) a, (int[]) b);
} else if (a instanceof long[]) {
compare((long[]) a, (long[]) b);
} else if (a instanceof byte[]) {
compare((byte[]) a, (byte[]) b);
} else if (a instanceof char[]) {
compare((char[]) a, (char[]) b);
} else if (a instanceof short[]) {
compare((short[]) a, (short[]) b);
} else if (a instanceof float[]) {
compare((float[]) a, (float[]) b);
} else if (a instanceof double[]) {
compare((double[]) a, (double[]) b);
} else {
fail("Unknown type of array: " + a.getClass().getName());
}
}
private void compare(int[] a, int[] b) {
for (int i = 0; i < a.length; i++) {
if (a[i] != b[i]) {
fail("There must be " + b[i] + " instead of " + a[i] + " at position " + i);
}
}
}
private void compare(long[] a, long[] b) {
for (int i = 0; i < a.length; i++) {
if (a[i] != b[i]) {
fail("There must be " + b[i] + " instead of " + a[i] + " at position " + i);
}
}
}
private void compare(byte[] a, byte[] b) {
for (int i = 0; i < a.length; i++) {
if (a[i] != b[i]) {
fail("There must be " + b[i] + " instead of " + a[i] + " at position " + i);
}
}
}
private void compare(char[] a, char[] b) {
for (int i = 0; i < a.length; i++) {
if (a[i] != b[i]) {
fail("There must be " + b[i] + " instead of " + a[i] + " at position " + i);
}
}
}
private void compare(short[] a, short[] b) {
for (int i = 0; i < a.length; i++) {
if (a[i] != b[i]) {
fail("There must be " + b[i] + " instead of " + a[i] + " at position " + i);
}
}
}
private void compare(float[] a, float[] b) {
for (int i = 0; i < a.length; i++) {
if (a[i] != b[i]) {
fail("There must be " + b[i] + " instead of " + a[i] + " at position " + i);
}
}
}
private void compare(double[] a, double[] b) {
for (int i = 0; i < a.length; i++) {
if (a[i] != b[i]) {
fail("There must be " + b[i] + " instead of " + a[i] + " at position " + i);
}
}
}
private String getType(int i) {
Object a = test[i];
if (a instanceof int[]) {
return "INT ";
}
if (a instanceof long[]) {
return "LONG ";
}
if (a instanceof byte[]) {
return "BYTE ";
}
if (a instanceof char[]) {
return "CHAR ";
}
if (a instanceof short[]) {
return "SHORT ";
}
if (a instanceof float[]) {
return "FLOAT ";
}
if (a instanceof double[]) {
return "DOUBLE";
}
fail("Unknown type of array: " + a.getClass().getName());
return null;
}
private void checkSorted(Object a) {
if (a instanceof int[]) {
checkSorted((int[]) a);
} else if (a instanceof long[]) {
checkSorted((long[]) a);
} else if (a instanceof byte[]) {
checkSorted((byte[]) a);
} else if (a instanceof char[]) {
checkSorted((char[]) a);
} else if (a instanceof short[]) {
checkSorted((short[]) a);
} else if (a instanceof float[]) {
checkSorted((float[]) a);
} else if (a instanceof double[]) {
checkSorted((double[]) a);
} else {
fail("Unknown type of array: " + a.getClass().getName());
}
}
private void checkSorted(int[] a) {
for (int i = 0; i < a.length - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
}
private void checkSorted(long[] a) {
for (int i = 0; i < a.length - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
}
private void checkSorted(byte[] a) {
for (int i = 0; i < a.length - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
}
private void checkSorted(char[] a) {
for (int i = 0; i < a.length - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
}
private void checkSorted(short[] a) {
for (int i = 0; i < a.length - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
}
private void checkSorted(float[] a) {
for (int i = 0; i < a.length - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
}
private void checkSorted(double[] a) {
for (int i = 0; i < a.length - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
}
private void checkCheckSum(Object test, Object gold) {
if (checkSumXor(test) != checkSumXor(gold)) {
fail("Original and sorted arrays are not identical [^]");
}
if (checkSumPlus(test) != checkSumPlus(gold)) {
fail("Original and sorted arrays are not identical [+]");
}
}
private int checkSumXor(Object a) {
if (a instanceof int[]) {
return checkSumXor((int[]) a);
}
if (a instanceof long[]) {
return checkSumXor((long[]) a);
}
if (a instanceof byte[]) {
return checkSumXor((byte[]) a);
}
if (a instanceof char[]) {
return checkSumXor((char[]) a);
}
if (a instanceof short[]) {
return checkSumXor((short[]) a);
}
if (a instanceof float[]) {
return checkSumXor((float[]) a);
}
if (a instanceof double[]) {
return checkSumXor((double[]) a);
}
fail("Unknown type of array: " + a.getClass().getName());
return -1;
}
private int checkSumXor(int[] a) {
int checkSum = 0;
for (int e : a) {
checkSum ^= e;
}
return checkSum;
}
private int checkSumXor(long[] a) {
long checkSum = 0;
for (long e : a) {
checkSum ^= e;
}
return (int) checkSum;
}
private int checkSumXor(byte[] a) {
byte checkSum = 0;
for (byte e : a) {
checkSum ^= e;
}
return (int) checkSum;
}
private int checkSumXor(char[] a) {
char checkSum = 0;
for (char e : a) {
checkSum ^= e;
}
return (int) checkSum;
}
private int checkSumXor(short[] a) {
short checkSum = 0;
for (short e : a) {
checkSum ^= e;
}
return (int) checkSum;
}
private int checkSumXor(float[] a) {
int checkSum = 0;
for (float e : a) {
checkSum ^= (int) e;
}
return checkSum;
}
private int checkSumXor(double[] a) {
int checkSum = 0;
for (double e : a) {
checkSum ^= (int) e;
}
return checkSum;
}
private int checkSumPlus(Object a) {
if (a instanceof int[]) {
return checkSumPlus((int[]) a);
}
if (a instanceof long[]) {
return checkSumPlus((long[]) a);
}
if (a instanceof byte[]) {
return checkSumPlus((byte[]) a);
}
if (a instanceof char[]) {
return checkSumPlus((char[]) a);
}
if (a instanceof short[]) {
return checkSumPlus((short[]) a);
}
if (a instanceof float[]) {
return checkSumPlus((float[]) a);
}
if (a instanceof double[]) {
return checkSumPlus((double[]) a);
}
fail("Unknown type of array: " + a.getClass().getName());
return -1;
}
private int checkSumPlus(int[] a) {
int checkSum = 0;
for (int e : a) {
checkSum += e;
}
return checkSum;
}
private int checkSumPlus(long[] a) {
long checkSum = 0;
for (long e : a) {
checkSum += e;
}
return (int) checkSum;
}
private int checkSumPlus(byte[] a) {
byte checkSum = 0;
for (byte e : a) {
checkSum += e;
}
return (int) checkSum;
}
private int checkSumPlus(char[] a) {
char checkSum = 0;
for (char e : a) {
checkSum += e;
}
return (int) checkSum;
}
private int checkSumPlus(short[] a) {
short checkSum = 0;
for (short e : a) {
checkSum += e;
}
return (int) checkSum;
}
private int checkSumPlus(float[] a) {
int checkSum = 0;
for (float e : a) {
checkSum += (int) e;
}
return checkSum;
}
private int checkSumPlus(double[] a) {
int checkSum = 0;
for (double e : a) {
checkSum += (int) e;
}
return checkSum;
}
private void sortByInsertionSort(Object a) {
if (a instanceof int[]) {
sortByInsertionSort((int[]) a);
} else if (a instanceof long[]) {
sortByInsertionSort((long[]) a);
} else if (a instanceof byte[]) {
sortByInsertionSort((byte[]) a);
} else if (a instanceof char[]) {
sortByInsertionSort((char[]) a);
} else if (a instanceof short[]) {
sortByInsertionSort((short[]) a);
} else if (a instanceof float[]) {
sortByInsertionSort((float[]) a);
} else if (a instanceof double[]) {
sortByInsertionSort((double[]) a);
} else {
fail("Unknown type of array: " + a.getClass().getName());
}
}
private void sortByInsertionSort(int[] a) {
for (int j, i = 1; i < a.length; i++) {
int ai = a[i];
for (j = i - 1; j >= 0 && ai < a[j]; j--) {
a[j + 1] = a[j];
}
a[j + 1] = ai;
}
}
private void sortByInsertionSort(long[] a) {
for (int j, i = 1; i < a.length; i++) {
long ai = a[i];
for (j = i - 1; j >= 0 && ai < a[j]; j--) {
a[j + 1] = a[j];
}
a[j + 1] = ai;
}
}
private void sortByInsertionSort(byte[] a) {
for (int j, i = 1; i < a.length; i++) {
byte ai = a[i];
for (j = i - 1; j >= 0 && ai < a[j]; j--) {
a[j + 1] = a[j];
}
a[j + 1] = ai;
}
}
private void sortByInsertionSort(char[] a) {
for (int j, i = 1; i < a.length; i++) {
char ai = a[i];
for (j = i - 1; j >= 0 && ai < a[j]; j--) {
a[j + 1] = a[j];
}
a[j + 1] = ai;
}
}
private void sortByInsertionSort(short[] a) {
for (int j, i = 1; i < a.length; i++) {
short ai = a[i];
for (j = i - 1; j >= 0 && ai < a[j]; j--) {
a[j + 1] = a[j];
}
a[j + 1] = ai;
}
}
private void sortByInsertionSort(float[] a) {
for (int j, i = 1; i < a.length; i++) {
float ai = a[i];
for (j = i - 1; j >= 0 && ai < a[j]; j--) {
a[j + 1] = a[j];
}
a[j + 1] = ai;
}
}
private void sortByInsertionSort(double[] a) {
for (int j, i = 1; i < a.length; i++) {
double ai = a[i];
for (j = i - 1; j >= 0 && ai < a[j]; j--) {
a[j + 1] = a[j];
}
a[j + 1] = ai;
}
}
private void checkSubArray(Object a, int fromIndex, int toIndex) {
if (a instanceof int[]) {
checkSubArray((int[]) a, fromIndex, toIndex);
} else if (a instanceof long[]) {
checkSubArray((long[]) a, fromIndex, toIndex);
} else if (a instanceof byte[]) {
checkSubArray((byte[]) a, fromIndex, toIndex);
} else if (a instanceof char[]) {
checkSubArray((char[]) a, fromIndex, toIndex);
} else if (a instanceof short[]) {
checkSubArray((short[]) a, fromIndex, toIndex);
} else if (a instanceof float[]) {
checkSubArray((float[]) a, fromIndex, toIndex);
} else if (a instanceof double[]) {
checkSubArray((double[]) a, fromIndex, toIndex);
} else {
fail("Unknown type of array: " + a.getClass().getName());
}
}
private void checkSubArray(int[] a, int fromIndex, int toIndex) {
for (int i = 0; i < fromIndex; i++) {
if (a[i] != A380) {
fail("Range sort changes left element at position " + i + hex(a[i], A380));
}
}
for (int i = fromIndex; i < toIndex - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
for (int i = toIndex; i < a.length; i++) {
if (a[i] != B747) {
fail("Range sort changes right element at position " + i + hex(a[i], B747));
}
}
}
private void checkSubArray(long[] a, int fromIndex, int toIndex) {
for (int i = 0; i < fromIndex; i++) {
if (a[i] != (long) A380) {
fail("Range sort changes left element at position " + i + hex(a[i], A380));
}
}
for (int i = fromIndex; i < toIndex - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
for (int i = toIndex; i < a.length; i++) {
if (a[i] != (long) B747) {
fail("Range sort changes right element at position " + i + hex(a[i], B747));
}
}
}
private void checkSubArray(byte[] a, int fromIndex, int toIndex) {
for (int i = 0; i < fromIndex; i++) {
if (a[i] != (byte) A380) {
fail("Range sort changes left element at position " + i + hex(a[i], A380));
}
}
for (int i = fromIndex; i < toIndex - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
for (int i = toIndex; i < a.length; i++) {
if (a[i] != (byte) B747) {
fail("Range sort changes right element at position " + i + hex(a[i], B747));
}
}
}
private void checkSubArray(char[] a, int fromIndex, int toIndex) {
for (int i = 0; i < fromIndex; i++) {
if (a[i] != (char) A380) {
fail("Range sort changes left element at position " + i + hex(a[i], A380));
}
}
for (int i = fromIndex; i < toIndex - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
for (int i = toIndex; i < a.length; i++) {
if (a[i] != (char) B747) {
fail("Range sort changes right element at position " + i + hex(a[i], B747));
}
}
}
private void checkSubArray(short[] a, int fromIndex, int toIndex) {
for (int i = 0; i < fromIndex; i++) {
if (a[i] != (short) A380) {
fail("Range sort changes left element at position " + i + hex(a[i], A380));
}
}
for (int i = fromIndex; i < toIndex - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
for (int i = toIndex; i < a.length; i++) {
if (a[i] != (short) B747) {
fail("Range sort changes right element at position " + i + hex(a[i], B747));
}
}
}
private void checkSubArray(float[] a, int fromIndex, int toIndex) {
for (int i = 0; i < fromIndex; i++) {
if (a[i] != (float) A380) {
fail("Range sort changes left element at position " + i + hex((long) a[i], A380));
}
}
for (int i = fromIndex; i < toIndex - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
for (int i = toIndex; i < a.length; i++) {
if (a[i] != (float) B747) {
fail("Range sort changes right element at position " + i + hex((long) a[i], B747));
}
}
}
private void checkSubArray(double[] a, int fromIndex, int toIndex) {
for (int i = 0; i < fromIndex; i++) {
if (a[i] != (double) A380) {
fail("Range sort changes left element at position " + i + hex((long) a[i], A380));
}
}
for (int i = fromIndex; i < toIndex - 1; i++) {
if (a[i] > a[i + 1]) {
fail("Array is not sorted at " + i + "-th position: " + a[i] + " and " + a[i + 1]);
}
}
for (int i = toIndex; i < a.length; i++) {
if (a[i] != (double) B747) {
fail("Range sort changes right element at position " + i + hex((long) a[i], B747));
}
}
}
private void checkRange(Object a, int m) {
if (a instanceof int[]) {
checkRange((int[]) a, m);
} else if (a instanceof long[]) {
checkRange((long[]) a, m);
} else if (a instanceof byte[]) {
checkRange((byte[]) a, m);
} else if (a instanceof char[]) {
checkRange((char[]) a, m);
} else if (a instanceof short[]) {
checkRange((short[]) a, m);
} else if (a instanceof float[]) {
checkRange((float[]) a, m);
} else if (a instanceof double[]) {
checkRange((double[]) a, m);
} else {
fail("Unknown type of array: " + a.getClass().getName());
}
}
private void checkRange(int[] a, int m) {
try {
sortingHelper.sort(a, m + 1, m);
fail(sortingHelper + " does not throw IllegalArgumentException " +
"as expected: fromIndex = " + (m + 1) + " toIndex = " + m);
} catch (IllegalArgumentException iae) {
try {
sortingHelper.sort(a, -m, a.length);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: fromIndex = " + (-m));
} catch (ArrayIndexOutOfBoundsException aoe) {
try {
sortingHelper.sort(a, 0, a.length + m);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: toIndex = " + (a.length + m));
} catch (ArrayIndexOutOfBoundsException expected) {}
}
}
}
private void checkRange(long[] a, int m) {
try {
sortingHelper.sort(a, m + 1, m);
fail(sortingHelper + " does not throw IllegalArgumentException " +
"as expected: fromIndex = " + (m + 1) + " toIndex = " + m);
} catch (IllegalArgumentException iae) {
try {
sortingHelper.sort(a, -m, a.length);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: fromIndex = " + (-m));
} catch (ArrayIndexOutOfBoundsException aoe) {
try {
sortingHelper.sort(a, 0, a.length + m);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: toIndex = " + (a.length + m));
} catch (ArrayIndexOutOfBoundsException expected) {}
}
}
}
private void checkRange(byte[] a, int m) {
try {
sortingHelper.sort(a, m + 1, m);
fail(sortingHelper + " does not throw IllegalArgumentException " +
"as expected: fromIndex = " + (m + 1) + " toIndex = " + m);
} catch (IllegalArgumentException iae) {
try {
sortingHelper.sort(a, -m, a.length);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: fromIndex = " + (-m));
} catch (ArrayIndexOutOfBoundsException aoe) {
try {
sortingHelper.sort(a, 0, a.length + m);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: toIndex = " + (a.length + m));
} catch (ArrayIndexOutOfBoundsException expected) {}
}
}
}
private void checkRange(char[] a, int m) {
try {
sortingHelper.sort(a, m + 1, m);
fail(sortingHelper + " does not throw IllegalArgumentException " +
"as expected: fromIndex = " + (m + 1) + " toIndex = " + m);
} catch (IllegalArgumentException iae) {
try {
sortingHelper.sort(a, -m, a.length);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: fromIndex = " + (-m));
} catch (ArrayIndexOutOfBoundsException aoe) {
try {
sortingHelper.sort(a, 0, a.length + m);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: toIndex = " + (a.length + m));
} catch (ArrayIndexOutOfBoundsException expected) {}
}
}
}
private void checkRange(short[] a, int m) {
try {
sortingHelper.sort(a, m + 1, m);
fail(sortingHelper + " does not throw IllegalArgumentException " +
"as expected: fromIndex = " + (m + 1) + " toIndex = " + m);
} catch (IllegalArgumentException iae) {
try {
sortingHelper.sort(a, -m, a.length);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: fromIndex = " + (-m));
} catch (ArrayIndexOutOfBoundsException aoe) {
try {
sortingHelper.sort(a, 0, a.length + m);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: toIndex = " + (a.length + m));
} catch (ArrayIndexOutOfBoundsException expected) {}
}
}
}
private void checkRange(float[] a, int m) {
try {
sortingHelper.sort(a, m + 1, m);
fail(sortingHelper + " does not throw IllegalArgumentException " +
"as expected: fromIndex = " + (m + 1) + " toIndex = " + m);
} catch (IllegalArgumentException iae) {
try {
sortingHelper.sort(a, -m, a.length);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: fromIndex = " + (-m));
} catch (ArrayIndexOutOfBoundsException aoe) {
try {
sortingHelper.sort(a, 0, a.length + m);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: toIndex = " + (a.length + m));
} catch (ArrayIndexOutOfBoundsException expected) {}
}
}
}
private void checkRange(double[] a, int m) {
try {
sortingHelper.sort(a, m + 1, m);
fail(sortingHelper + " does not throw IllegalArgumentException " +
"as expected: fromIndex = " + (m + 1) + " toIndex = " + m);
} catch (IllegalArgumentException iae) {
try {
sortingHelper.sort(a, -m, a.length);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: fromIndex = " + (-m));
} catch (ArrayIndexOutOfBoundsException aoe) {
try {
sortingHelper.sort(a, 0, a.length + m);
fail(sortingHelper + " does not throw ArrayIndexOutOfBoundsException " +
"as expected: toIndex = " + (a.length + m));
} catch (ArrayIndexOutOfBoundsException expected) {}
}
}
}
private void copy(Object dst, Object src) {
if (src instanceof float[]) {
copy((float[]) dst, (float[]) src);
} else if (src instanceof double[]) {
copy((double[]) dst, (double[]) src);
} else {
fail("Unknown type of array: " + src.getClass().getName());
}
}
private void copy(float[] dst, float[] src) {
System.arraycopy(src, 0, dst, 0, src.length);
}
private void copy(double[] dst, double[] src) {
System.arraycopy(src, 0, dst, 0, src.length);
}
private void printTestName(String test, TestRandom random, int length) {
printTestName(test, random, length, "");
}
private void createData(int length) {
gold = new Object[] {
new int[length], new long[length],
new byte[length], new char[length], new short[length],
new float[length], new double[length]
};
test = new Object[] {
new int[length], new long[length],
new byte[length], new char[length], new short[length],
new float[length], new double[length]
};
}
private void convertData(int length) {
for (int i = 1; i < gold.length; i++) {
TypeConverter converter = TypeConverter.values()[i - 1];
converter.convert((int[])gold[0], gold[i]);
}
for (int i = 0; i < gold.length; i++) {
System.arraycopy(gold[i], 0, test[i], 0, length);
}
}
private String hex(long a, int b) {
return ": " + Long.toHexString(a) + ", must be " + Integer.toHexString(b);
}
private void printTestName(String test, TestRandom random, int length, String message) {
out.println( "[" + sortingHelper + "] '" + test +
"' length = " + length + ", random = " + random + message);
}
private static enum TypeConverter {
LONG {
void convert(int[] src, Object dst) {
long[] b = (long[]) dst;
for (int i = 0; i < src.length; i++) {
b[i] = (long) src[i];
}
}
},
BYTE {
void convert(int[] src, Object dst) {
byte[] b = (byte[]) dst;
for (int i = 0; i < src.length; i++) {
b[i] = (byte) src[i];
}
}
},
CHAR {
void convert(int[] src, Object dst) {
char[] b = (char[]) dst;
for (int i = 0; i < src.length; i++) {
b[i] = (char) src[i];
}
}
},
SHORT {
void convert(int[] src, Object dst) {
short[] b = (short[]) dst;
for (int i = 0; i < src.length; i++) {
b[i] = (short) src[i];
}
}
},
FLOAT {
void convert(int[] src, Object dst) {
float[] b = (float[]) dst;
for (int i = 0; i < src.length; i++) {
b[i] = (float) src[i];
}
}
},
DOUBLE {
void convert(int[] src, Object dst) {
double[] b = (double[]) dst;
for (int i = 0; i < src.length; i++) {
b[i] = (double) src[i];
}
}
};
abstract void convert(int[] src, Object dst);
}
private static enum SortedBuilder {
STEPS {
void build(int[] a, int m) {
for (int i = 0; i < m; i++) {
a[i] = 0;
}
for (int i = m; i < a.length; i++) {
a[i] = 1;
}
}
};
abstract void build(int[] a, int m);
}
private static enum UnsortedBuilder {
RANDOM {
void build(int[] a, int m, Random random) {
for (int i = 0; i < a.length; i++) {
a[i] = random.nextInt();
}
}
},
ASCENDING {
void build(int[] a, int m, Random random) {
for (int i = 0; i < a.length; i++) {
a[i] = m + i;
}
}
},
DESCENDING {
void build(int[] a, int m, Random random) {
for (int i = 0; i < a.length; i++) {
a[i] = a.length - m - i;
}
}
},
EQUAL {
void build(int[] a, int m, Random random) {
for (int i = 0; i < a.length; i++) {
a[i] = m;
}
}
},
SAW {
void build(int[] a, int m, Random random) {
int incCount = 1;
int decCount = a.length;
int i = 0;
int period = m--;
while (true) {
for (int k = 1; k <= period; k++) {
if (i >= a.length) {
return;
}
a[i++] = incCount++;
}
period += m;
for (int k = 1; k <= period; k++) {
if (i >= a.length) {
return;
}
a[i++] = decCount--;
}
period += m;
}
}
},
REPEATED {
void build(int[] a, int m, Random random) {
for (int i = 0; i < a.length; i++) {
a[i] = i % m;
}
}
},
DUPLICATED {
void build(int[] a, int m, Random random) {
for (int i = 0; i < a.length; i++) {
a[i] = random.nextInt(m);
}
}
},
ORGAN_PIPES {
void build(int[] a, int m, Random random) {
int middle = a.length / (m + 1);
for (int i = 0; i < middle; i++) {
a[i] = i;
}
for (int i = middle; i < a.length; i++) {
a[i] = a.length - i - 1;
}
}
},
STAGGER {
void build(int[] a, int m, Random random) {
for (int i = 0; i < a.length; i++) {
a[i] = (i * m + i) % a.length;
}
}
},
PLATEAU {
void build(int[] a, int m, Random random) {
for (int i = 0; i < a.length; i++) {
a[i] = Math.min(i, m);
}
}
},
SHUFFLE {
void build(int[] a, int m, Random random) {
int x = 0, y = 0;
for (int i = 0; i < a.length; i++) {
a[i] = random.nextBoolean() ? (x += 2) : (y += 2);
}
}
},
LATCH {
void build(int[] a, int m, Random random) {
int max = a.length / m;
max = max < 2 ? 2 : max;
for (int i = 0; i < a.length; i++) {
a[i] = i % max;
}
}
};
abstract void build(int[] a, int m, Random random);
}
private static enum MergingBuilder {
ASCENDING {
void build(int[] a, int m) {
int period = a.length / m;
int v = 1, i = 0;
for (int k = 0; k < m; k++) {
v = 1;
for (int p = 0; p < period; p++) {
a[i++] = v++;
}
}
for (int j = i; j < a.length - 1; j++) {
a[j] = v++;
}
a[a.length - 1] = 0;
}
},
DESCENDING {
void build(int[] a, int m) {
int period = a.length / m;
int v = -1, i = 0;
for (int k = 0; k < m; k++) {
v = -1;
for (int p = 0; p < period; p++) {
a[i++] = v--;
}
}
for (int j = i; j < a.length - 1; j++) {
a[j] = v--;
}
a[a.length - 1] = 0;
}
},
POINT {
void build(int[] a, int m) {
for (int i = 0; i < a.length; i++) {
a[i] = 0;
}
a[a.length / 2] = m;
}
},
LINE {
void build(int[] a, int m) {
for (int i = 0; i < a.length; i++) {
a[i] = i;
}
reverse(a, 0, a.length - 1);
}
},
PEARL {
void build(int[] a, int m) {
for (int i = 0; i < a.length; i++) {
a[i] = i;
}
reverse(a, 0, 2);
}
},
RING {
void build(int[] a, int m) {
int k1 = a.length / 3;
int k2 = a.length / 3 * 2;
int level = a.length / 3;
for (int i = 0, k = level; i < k1; i++) {
a[i] = k--;
}
for (int i = k1; i < k2; i++) {
a[i] = 0;
}
for (int i = k2, k = level; i < a.length; i++) {
a[i] = k--;
}
}
};
abstract void build(int[] a, int m);
private static void reverse(int[] a, int lo, int hi) {
for (--hi; lo < hi; ) {
int tmp = a[lo];
a[lo++] = a[hi];
a[hi--] = tmp;
}
}
}
private static enum NegativeZeroBuilder {
FLOAT {
void build(Object o, Random random) {
float[] a = (float[]) o;
for (int i = 0; i < a.length; i++) {
a[i] = random.nextBoolean() ? -0.0f : 0.0f;
}
}
},
DOUBLE {
void build(Object o, Random random) {
double[] a = (double[]) o;
for (int i = 0; i < a.length; i++) {
a[i] = random.nextBoolean() ? -0.0d : 0.0d;
}
}
};
abstract void build(Object o, Random random);
}
private static enum FloatingPointBuilder {
FLOAT {
void build(Object o, int a, int g, int z, int n, int p, Random random) {
float negativeValue = -random.nextFloat();
float positiveValue = random.nextFloat();
float[] x = (float[]) o;
int fromIndex = 0;
writeValue(x, negativeValue, fromIndex, n);
fromIndex += n;
writeValue(x, -0.0f, fromIndex, g);
fromIndex += g;
writeValue(x, 0.0f, fromIndex, z);
fromIndex += z;
writeValue(x, positiveValue, fromIndex, p);
fromIndex += p;
writeValue(x, Float.NaN, fromIndex, a);
}
},
DOUBLE {
void build(Object o, int a, int g, int z, int n, int p, Random random) {
double negativeValue = -random.nextFloat();
double positiveValue = random.nextFloat();
double[] x = (double[]) o;
int fromIndex = 0;
writeValue(x, negativeValue, fromIndex, n);
fromIndex += n;
writeValue(x, -0.0d, fromIndex, g);
fromIndex += g;
writeValue(x, 0.0d, fromIndex, z);
fromIndex += z;
writeValue(x, positiveValue, fromIndex, p);
fromIndex += p;
writeValue(x, Double.NaN, fromIndex, a);
}
};
abstract void build(Object o, int a, int g, int z, int n, int p, Random random);
private static void writeValue(float[] a, float value, int fromIndex, int count) {
for (int i = fromIndex; i < fromIndex + count; i++) {
a[i] = value;
}
}
private static void writeValue(double[] a, double value, int fromIndex, int count) {
for (int i = fromIndex; i < fromIndex + count; i++) {
a[i] = value;
}
}
}
private static Comparator<Pair> pairComparator = new Comparator<Pair>() {
@Override
public int compare(Pair p1, Pair p2) {
return p1.compareTo(p2);
}
};
private static class Pair implements Comparable<Pair> {
private Pair(int key, int value) {
this.key = key;
this.value = value;
}
int getKey() {
return key;
}
int getValue() {
return value;
}
@Override
public int compareTo(Pair pair) {
return Integer.compare(key, pair.key);
}
@Override
public String toString() {
return "(" + key + ", " + value + ")";
}
private int key;
private int value;
}
private static class TestRandom extends Random {
private static final TestRandom BABA = new TestRandom(0xBABA);
private static final TestRandom DEDA = new TestRandom(0xDEDA);
private static final TestRandom C0FFEE = new TestRandom(0xC0FFEE);
private TestRandom(long seed) {
super(seed);
this.seed = Long.toHexString(seed).toUpperCase();
}
@Override
public String toString() {
return seed;
}
private String seed;
}
}