739 lines
27 KiB
Java
739 lines
27 KiB
Java
/*
|
|
* Copyright (c) 2017, 2024, 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.
|
|
*/
|
|
|
|
import org.testng.Assert;
|
|
import org.testng.annotations.DataProvider;
|
|
import org.testng.annotations.Test;
|
|
|
|
import java.io.IOException;
|
|
import java.lang.invoke.MethodHandle;
|
|
import java.lang.invoke.MethodHandles;
|
|
import java.lang.invoke.MethodType;
|
|
import java.nio.Buffer;
|
|
import java.nio.ByteBuffer;
|
|
import java.nio.ByteOrder;
|
|
import java.nio.CharBuffer;
|
|
import java.nio.DoubleBuffer;
|
|
import java.nio.FloatBuffer;
|
|
import java.nio.IntBuffer;
|
|
import java.nio.LongBuffer;
|
|
import java.nio.MappedByteBuffer;
|
|
import java.nio.ShortBuffer;
|
|
import java.nio.channels.FileChannel;
|
|
import java.nio.file.Files;
|
|
import java.nio.file.Path;
|
|
import java.util.HashMap;
|
|
import java.util.Map;
|
|
import java.util.Set;
|
|
import java.util.function.BiFunction;
|
|
import java.util.function.LongFunction;
|
|
import java.util.stream.IntStream;
|
|
|
|
import static java.nio.charset.StandardCharsets.UTF_8;
|
|
import static java.nio.file.StandardOpenOption.*;
|
|
|
|
/*
|
|
* @test
|
|
* @bug 8193085 8199773
|
|
* @summary tests for buffer equals and compare
|
|
* @run testng EqualsCompareTest
|
|
*/
|
|
|
|
public class EqualsCompareTest {
|
|
|
|
// Maximum width in bits
|
|
static final int MAX_WIDTH = 512;
|
|
|
|
static final Map<Class, Integer> typeToWidth;
|
|
|
|
static {
|
|
typeToWidth = new HashMap<>();
|
|
typeToWidth.put(byte.class, Byte.SIZE);
|
|
typeToWidth.put(short.class, Short.SIZE);
|
|
typeToWidth.put(char.class, Character.SIZE);
|
|
typeToWidth.put(int.class, Integer.SIZE);
|
|
typeToWidth.put(long.class, Long.SIZE);
|
|
typeToWidth.put(float.class, Float.SIZE);
|
|
typeToWidth.put(double.class, Double.SIZE);
|
|
}
|
|
|
|
static int arraySizeFor(Class<?> type) {
|
|
assert type.isPrimitive();
|
|
return 4 * MAX_WIDTH / typeToWidth.get(type);
|
|
}
|
|
|
|
enum BufferKind {
|
|
HEAP,
|
|
HEAP_VIEW,
|
|
DIRECT;
|
|
}
|
|
|
|
static abstract class BufferType<T extends Buffer, E> {
|
|
final BufferKind k;
|
|
final Class<?> bufferType;
|
|
final Class<?> elementType;
|
|
|
|
final MethodHandle eq;
|
|
final MethodHandle cmp;
|
|
final MethodHandle mismtch;
|
|
|
|
final MethodHandle getter;
|
|
final MethodHandle setter;
|
|
|
|
BufferType(BufferKind k, Class<T> bufferType, Class<?> elementType) {
|
|
this.k = k;
|
|
this.bufferType = bufferType;
|
|
this.elementType = elementType;
|
|
|
|
var lookup = MethodHandles.lookup();
|
|
try {
|
|
eq = lookup.findVirtual(bufferType, "equals", MethodType.methodType(boolean.class, Object.class));
|
|
cmp = lookup.findVirtual(bufferType, "compareTo", MethodType.methodType(int.class, bufferType));
|
|
mismtch = lookup.findVirtual(bufferType, "mismatch", MethodType.methodType(int.class, bufferType));
|
|
|
|
getter = lookup.findVirtual(bufferType, "get", MethodType.methodType(elementType, int.class));
|
|
setter = lookup.findVirtual(bufferType, "put", MethodType.methodType(bufferType, int.class, elementType));
|
|
}
|
|
catch (Exception e) {
|
|
throw new AssertionError(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return bufferType.getName() + " " + k;
|
|
}
|
|
|
|
T construct(int length) {
|
|
return construct(length, ByteOrder.BIG_ENDIAN);
|
|
}
|
|
|
|
abstract T construct(int length, ByteOrder bo);
|
|
|
|
@SuppressWarnings("unchecked")
|
|
T slice(T a, int from, int to, boolean dupOtherwiseSlice) {
|
|
a = (T) a.position(from).limit(to);
|
|
return (T) (dupOtherwiseSlice ? a.duplicate() : a.slice());
|
|
}
|
|
|
|
@SuppressWarnings("unchecked")
|
|
E get(T a, int i) {
|
|
try {
|
|
return (E) getter.invoke(a, i);
|
|
}
|
|
catch (RuntimeException | Error e) {
|
|
throw e;
|
|
}
|
|
catch (Throwable t) {
|
|
throw new Error(t);
|
|
}
|
|
}
|
|
|
|
void set(T a, int i, Object v) {
|
|
try {
|
|
setter.invoke(a, i, convert(v));
|
|
}
|
|
catch (RuntimeException | Error e) {
|
|
throw e;
|
|
}
|
|
catch (Throwable t) {
|
|
throw new Error(t);
|
|
}
|
|
}
|
|
|
|
abstract Object convert(Object o);
|
|
|
|
boolean equals(T a, T b) {
|
|
try {
|
|
return (boolean) eq.invoke(a, b);
|
|
}
|
|
catch (RuntimeException | Error e) {
|
|
throw e;
|
|
}
|
|
catch (Throwable t) {
|
|
throw new Error(t);
|
|
}
|
|
}
|
|
|
|
int compare(T a, T b) {
|
|
try {
|
|
return (int) cmp.invoke(a, b);
|
|
}
|
|
catch (RuntimeException | Error e) {
|
|
throw e;
|
|
}
|
|
catch (Throwable t) {
|
|
throw new Error(t);
|
|
}
|
|
}
|
|
|
|
boolean pairWiseEquals(T a, T b) {
|
|
if (a.remaining() != b.remaining())
|
|
return false;
|
|
int p = a.position();
|
|
for (int i = a.limit() - 1, j = b.limit() - 1; i >= p; i--, j--)
|
|
if (!get(a, i).equals(get(b, j)))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
int mismatch(T a, T b) {
|
|
try {
|
|
return (int) mismtch.invoke(a, b);
|
|
}
|
|
catch (RuntimeException | Error e) {
|
|
throw e;
|
|
}
|
|
catch (Throwable t) {
|
|
throw new Error(t);
|
|
}
|
|
}
|
|
|
|
static class Bytes extends BufferType<ByteBuffer, Byte> {
|
|
Bytes(BufferKind k) {
|
|
super(k, ByteBuffer.class, byte.class);
|
|
}
|
|
|
|
@Override
|
|
ByteBuffer construct(int length, ByteOrder bo) {
|
|
switch (k) {
|
|
case DIRECT:
|
|
return ByteBuffer.allocateDirect(length).order(bo);
|
|
default:
|
|
case HEAP_VIEW:
|
|
case HEAP:
|
|
return ByteBuffer.allocate(length).order(bo);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
Object convert(Object o) {
|
|
return o instanceof Integer
|
|
? ((Integer) o).byteValue()
|
|
: o;
|
|
}
|
|
}
|
|
|
|
static class Chars extends BufferType<CharBuffer, Character> {
|
|
Chars(BufferKind k) {
|
|
super(k, CharBuffer.class, char.class);
|
|
}
|
|
|
|
@Override
|
|
CharBuffer construct(int length, ByteOrder bo) {
|
|
switch (k) {
|
|
case DIRECT:
|
|
return ByteBuffer.allocateDirect(length * Character.BYTES).
|
|
order(bo).
|
|
asCharBuffer();
|
|
case HEAP_VIEW:
|
|
return ByteBuffer.allocate(length * Character.BYTES).
|
|
order(bo).
|
|
asCharBuffer();
|
|
default:
|
|
case HEAP:
|
|
return CharBuffer.allocate(length);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
Object convert(Object o) {
|
|
return o instanceof Integer
|
|
? (char) ((Integer) o).intValue()
|
|
: o;
|
|
}
|
|
|
|
CharBuffer transformToStringBuffer(CharBuffer c) {
|
|
char[] chars = new char[c.remaining()];
|
|
c.get(chars);
|
|
return CharBuffer.wrap(new String(chars));
|
|
}
|
|
}
|
|
|
|
static class Shorts extends BufferType<ShortBuffer, Short> {
|
|
Shorts(BufferKind k) {
|
|
super(k, ShortBuffer.class, short.class);
|
|
}
|
|
|
|
@Override
|
|
ShortBuffer construct(int length, ByteOrder bo) {
|
|
switch (k) {
|
|
case DIRECT:
|
|
return ByteBuffer.allocateDirect(length * Short.BYTES).
|
|
order(bo).
|
|
asShortBuffer();
|
|
case HEAP_VIEW:
|
|
return ByteBuffer.allocate(length * Short.BYTES).
|
|
order(bo).
|
|
asShortBuffer();
|
|
default:
|
|
case HEAP:
|
|
return ShortBuffer.allocate(length);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
Object convert(Object o) {
|
|
return o instanceof Integer
|
|
? ((Integer) o).shortValue()
|
|
: o;
|
|
}
|
|
}
|
|
|
|
static class Ints extends BufferType<IntBuffer, Integer> {
|
|
Ints(BufferKind k) {
|
|
super(k, IntBuffer.class, int.class);
|
|
}
|
|
|
|
@Override
|
|
IntBuffer construct(int length, ByteOrder bo) {
|
|
switch (k) {
|
|
case DIRECT:
|
|
return ByteBuffer.allocateDirect(length * Integer.BYTES).
|
|
order(bo).
|
|
asIntBuffer();
|
|
case HEAP_VIEW:
|
|
return ByteBuffer.allocate(length * Integer.BYTES).
|
|
order(bo).
|
|
asIntBuffer();
|
|
default:
|
|
case HEAP:
|
|
return IntBuffer.allocate(length);
|
|
}
|
|
}
|
|
|
|
Object convert(Object o) {
|
|
return o;
|
|
}
|
|
}
|
|
|
|
static class Floats extends BufferType<FloatBuffer, Float> {
|
|
Floats(BufferKind k) {
|
|
super(k, FloatBuffer.class, float.class);
|
|
}
|
|
|
|
@Override
|
|
FloatBuffer construct(int length, ByteOrder bo) {
|
|
switch (k) {
|
|
case DIRECT:
|
|
return ByteBuffer.allocateDirect(length * Float.BYTES).
|
|
order(bo).
|
|
asFloatBuffer();
|
|
case HEAP_VIEW:
|
|
return ByteBuffer.allocate(length * Float.BYTES).
|
|
order(bo).
|
|
asFloatBuffer();
|
|
default:
|
|
case HEAP:
|
|
return FloatBuffer.allocate(length);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
Object convert(Object o) {
|
|
return o instanceof Integer
|
|
? ((Integer) o).floatValue()
|
|
: o;
|
|
}
|
|
|
|
@Override
|
|
boolean pairWiseEquals(FloatBuffer a, FloatBuffer b) {
|
|
if (a.remaining() != b.remaining())
|
|
return false;
|
|
int p = a.position();
|
|
for (int i = a.limit() - 1, j = b.limit() - 1; i >= p; i--, j--) {
|
|
float av = a.get(i);
|
|
float bv = b.get(j);
|
|
if (av != bv && (!Float.isNaN(av) || !Float.isNaN(bv)))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
|
|
static class Longs extends BufferType<LongBuffer, Long> {
|
|
Longs(BufferKind k) {
|
|
super(k, LongBuffer.class, long.class);
|
|
}
|
|
|
|
@Override
|
|
LongBuffer construct(int length, ByteOrder bo) {
|
|
switch (k) {
|
|
case DIRECT:
|
|
return ByteBuffer.allocateDirect(length * Long.BYTES).
|
|
order(bo).
|
|
asLongBuffer();
|
|
case HEAP_VIEW:
|
|
return ByteBuffer.allocate(length * Long.BYTES).
|
|
order(bo).
|
|
asLongBuffer();
|
|
default:
|
|
case HEAP:
|
|
return LongBuffer.allocate(length);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
Object convert(Object o) {
|
|
return o instanceof Integer
|
|
? ((Integer) o).longValue()
|
|
: o;
|
|
}
|
|
}
|
|
|
|
static class Doubles extends BufferType<DoubleBuffer, Double> {
|
|
Doubles(BufferKind k) {
|
|
super(k, DoubleBuffer.class, double.class);
|
|
}
|
|
|
|
@Override
|
|
DoubleBuffer construct(int length, ByteOrder bo) {
|
|
switch (k) {
|
|
case DIRECT:
|
|
return ByteBuffer.allocateDirect(length * Double.BYTES).
|
|
order(bo).
|
|
asDoubleBuffer();
|
|
case HEAP_VIEW:
|
|
return ByteBuffer.allocate(length * Double.BYTES).
|
|
order(bo).
|
|
asDoubleBuffer();
|
|
default:
|
|
case HEAP:
|
|
return DoubleBuffer.allocate(length);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
Object convert(Object o) {
|
|
return o instanceof Integer
|
|
? ((Integer) o).doubleValue()
|
|
: o;
|
|
}
|
|
|
|
@Override
|
|
boolean pairWiseEquals(DoubleBuffer a, DoubleBuffer b) {
|
|
if (a.remaining() != b.remaining())
|
|
return false;
|
|
int p = a.position();
|
|
for (int i = a.limit() - 1, j = b.limit() - 1; i >= p; i--, j--) {
|
|
double av = a.get(i);
|
|
double bv = b.get(j);
|
|
if (av != bv && (!Double.isNaN(av) || !Double.isNaN(bv)))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
static Object[][] bufferTypes;
|
|
|
|
@DataProvider
|
|
public static Object[][] bufferTypesProvider() {
|
|
if (bufferTypes == null) {
|
|
bufferTypes = new Object[][]{
|
|
{new BufferType.Bytes(BufferKind.HEAP)},
|
|
{new BufferType.Bytes(BufferKind.DIRECT)},
|
|
{new BufferType.Chars(BufferKind.HEAP)},
|
|
{new BufferType.Chars(BufferKind.HEAP_VIEW)},
|
|
{new BufferType.Chars(BufferKind.DIRECT)},
|
|
{new BufferType.Shorts(BufferKind.HEAP)},
|
|
{new BufferType.Shorts(BufferKind.HEAP_VIEW)},
|
|
{new BufferType.Shorts(BufferKind.DIRECT)},
|
|
{new BufferType.Ints(BufferKind.HEAP)},
|
|
{new BufferType.Ints(BufferKind.HEAP_VIEW)},
|
|
{new BufferType.Ints(BufferKind.DIRECT)},
|
|
{new BufferType.Floats(BufferKind.HEAP)},
|
|
{new BufferType.Floats(BufferKind.HEAP_VIEW)},
|
|
{new BufferType.Floats(BufferKind.DIRECT)},
|
|
{new BufferType.Longs(BufferKind.HEAP)},
|
|
{new BufferType.Longs(BufferKind.HEAP_VIEW)},
|
|
{new BufferType.Longs(BufferKind.DIRECT)},
|
|
{new BufferType.Doubles(BufferKind.HEAP)},
|
|
{new BufferType.Doubles(BufferKind.HEAP_VIEW)},
|
|
{new BufferType.Doubles(BufferKind.DIRECT)},
|
|
};
|
|
}
|
|
return bufferTypes;
|
|
}
|
|
|
|
|
|
static Object[][] floatbufferTypes;
|
|
|
|
@DataProvider
|
|
public static Object[][] floatBufferTypesProvider() {
|
|
if (floatbufferTypes == null) {
|
|
LongFunction<Object> bTof = rb -> Float.intBitsToFloat((int) rb);
|
|
LongFunction<Object> bToD = Double::longBitsToDouble;
|
|
|
|
floatbufferTypes = new Object[][]{
|
|
// canonical and non-canonical NaNs
|
|
// If conversion is a signalling NaN it may be subject to conversion to a
|
|
// quiet NaN on some processors, even if a copy is performed
|
|
// The tests assume that if conversion occurs it does not convert to the
|
|
// canonical NaN
|
|
new Object[]{new BufferType.Floats(BufferKind.HEAP), 0x7fc00000L, 0x7f800001L, bTof},
|
|
new Object[]{new BufferType.Floats(BufferKind.HEAP_VIEW), 0x7fc00000L, 0x7f800001L, bTof},
|
|
new Object[]{new BufferType.Floats(BufferKind.DIRECT), 0x7fc00000L, 0x7f800001L, bTof},
|
|
new Object[]{new BufferType.Doubles(BufferKind.HEAP), 0x7ff8000000000000L, 0x7ff0000000000001L, bToD},
|
|
new Object[]{new BufferType.Doubles(BufferKind.HEAP_VIEW), 0x7ff8000000000000L, 0x7ff0000000000001L, bToD},
|
|
new Object[]{new BufferType.Doubles(BufferKind.DIRECT), 0x7ff8000000000000L, 0x7ff0000000000001L, bToD},
|
|
|
|
// +0.0 and -0.0
|
|
new Object[]{new BufferType.Floats(BufferKind.HEAP), 0x0L, 0x80000000L, bTof},
|
|
new Object[]{new BufferType.Floats(BufferKind.HEAP_VIEW), 0x0L, 0x80000000L, bTof},
|
|
new Object[]{new BufferType.Floats(BufferKind.DIRECT), 0x0L, 0x80000000L, bTof},
|
|
new Object[]{new BufferType.Doubles(BufferKind.HEAP), 0x0L, 0x8000000000000000L, bToD},
|
|
new Object[]{new BufferType.Doubles(BufferKind.HEAP_VIEW), 0x0L, 0x8000000000000000L, bToD},
|
|
new Object[]{new BufferType.Doubles(BufferKind.DIRECT), 0x0L, 0x8000000000000000L, bToD},
|
|
};
|
|
}
|
|
return floatbufferTypes;
|
|
}
|
|
|
|
|
|
static Object[][] charBufferTypes;
|
|
|
|
@DataProvider
|
|
public static Object[][] charBufferTypesProvider() {
|
|
if (charBufferTypes == null) {
|
|
charBufferTypes = new Object[][]{
|
|
{new BufferType.Chars(BufferKind.HEAP)},
|
|
{new BufferType.Chars(BufferKind.HEAP_VIEW)},
|
|
{new BufferType.Chars(BufferKind.DIRECT)},
|
|
};
|
|
}
|
|
return charBufferTypes;
|
|
}
|
|
|
|
|
|
// Tests all primitive buffers
|
|
@Test(dataProvider = "bufferTypesProvider")
|
|
<E>
|
|
void testBuffers(BufferType<Buffer, E> bufferType) {
|
|
// Test with buffers of the same byte order (BE)
|
|
BiFunction<BufferType<Buffer, E>, Integer, Buffer> constructor = (at, s) -> {
|
|
Buffer a = at.construct(s);
|
|
for (int x = 0; x < s; x++) {
|
|
at.set(a, x, x % 8);
|
|
}
|
|
return a;
|
|
};
|
|
|
|
testBufferType(bufferType, constructor, constructor);
|
|
|
|
// Test with buffers of different byte order
|
|
if (bufferType.elementType != byte.class &&
|
|
(bufferType.k == BufferKind.HEAP_VIEW ||
|
|
bufferType.k == BufferKind.DIRECT)) {
|
|
|
|
BiFunction<BufferType<Buffer, E>, Integer, Buffer> leConstructor = (at, s) -> {
|
|
Buffer a = at.construct(s, ByteOrder.LITTLE_ENDIAN);
|
|
for (int x = 0; x < s; x++) {
|
|
at.set(a, x, x % 8);
|
|
}
|
|
return a;
|
|
};
|
|
testBufferType(bufferType, constructor, leConstructor);
|
|
}
|
|
}
|
|
|
|
// Tests float and double buffers with edge-case values (NaN, -0.0, +0.0)
|
|
@Test(dataProvider = "floatBufferTypesProvider")
|
|
public void testFloatBuffers(
|
|
BufferType<Buffer, Float> bufferType,
|
|
long rawBitsA, long rawBitsB,
|
|
LongFunction<Object> bitsToFloat) {
|
|
Object av = bitsToFloat.apply(rawBitsA);
|
|
Object bv = bitsToFloat.apply(rawBitsB);
|
|
|
|
BiFunction<BufferType<Buffer, Float>, Integer, Buffer> allAs = (at, s) -> {
|
|
Buffer b = at.construct(s);
|
|
for (int x = 0; x < s; x++) {
|
|
at.set(b, x, av);
|
|
}
|
|
return b;
|
|
};
|
|
|
|
BiFunction<BufferType<Buffer, Float>, Integer, Buffer> allBs = (at, s) -> {
|
|
Buffer b = at.construct(s);
|
|
for (int x = 0; x < s; x++) {
|
|
at.set(b, x, bv);
|
|
}
|
|
return b;
|
|
};
|
|
|
|
BiFunction<BufferType<Buffer, Float>, Integer, Buffer> halfBs = (at, s) -> {
|
|
Buffer b = at.construct(s);
|
|
for (int x = 0; x < s / 2; x++) {
|
|
at.set(b, x, bv);
|
|
}
|
|
for (int x = s / 2; x < s; x++) {
|
|
at.set(b, x, 1);
|
|
}
|
|
return b;
|
|
};
|
|
|
|
// Sanity check
|
|
int size = arraySizeFor(bufferType.elementType);
|
|
Assert.assertTrue(bufferType.pairWiseEquals(allAs.apply(bufferType, size),
|
|
allBs.apply(bufferType, size)));
|
|
Assert.assertTrue(bufferType.equals(allAs.apply(bufferType, size),
|
|
allBs.apply(bufferType, size)));
|
|
|
|
testBufferType(bufferType, allAs, allBs);
|
|
testBufferType(bufferType, allAs, halfBs);
|
|
}
|
|
|
|
// Tests CharBuffer for region sources and CharSequence sources
|
|
@Test(dataProvider = "charBufferTypesProvider")
|
|
public void testCharBuffers(BufferType.Chars charBufferType) {
|
|
|
|
BiFunction<BufferType.Chars, Integer, CharBuffer> constructor = (at, s) -> {
|
|
CharBuffer a = at.construct(s);
|
|
for (int x = 0; x < s; x++) {
|
|
at.set(a, x, x % 8);
|
|
}
|
|
return a;
|
|
};
|
|
|
|
BiFunction<BufferType.Chars, Integer, CharBuffer> constructorX = constructor.
|
|
andThen(charBufferType::transformToStringBuffer);
|
|
|
|
testBufferType(charBufferType, constructor, constructorX);
|
|
}
|
|
|
|
|
|
<B extends Buffer, E, BT extends BufferType<B, E>>
|
|
void testBufferType(BT bt,
|
|
BiFunction<BT, Integer, B> aConstructor,
|
|
BiFunction<BT, Integer, B> bConstructor) {
|
|
int n = arraySizeFor(bt.elementType);
|
|
|
|
for (boolean dupOtherwiseSlice : new boolean[]{ false, true }) {
|
|
for (int s : ranges(0, n)) {
|
|
B a = aConstructor.apply(bt, s);
|
|
B b = bConstructor.apply(bt, s);
|
|
|
|
for (int aFrom : ranges(0, s)) {
|
|
for (int aTo : ranges(aFrom, s)) {
|
|
int aLength = aTo - aFrom;
|
|
|
|
B as = aLength != s
|
|
? bt.slice(a, aFrom, aTo, dupOtherwiseSlice)
|
|
: a;
|
|
|
|
for (int bFrom : ranges(0, s)) {
|
|
for (int bTo : ranges(bFrom, s)) {
|
|
int bLength = bTo - bFrom;
|
|
|
|
B bs = bLength != s
|
|
? bt.slice(b, bFrom, bTo, dupOtherwiseSlice)
|
|
: b;
|
|
|
|
boolean eq = bt.pairWiseEquals(as, bs);
|
|
Assert.assertEquals(bt.equals(as, bs), eq);
|
|
Assert.assertEquals(bt.equals(bs, as), eq);
|
|
if (eq) {
|
|
Assert.assertEquals(bt.compare(as, bs), 0);
|
|
Assert.assertEquals(bt.compare(bs, as), 0);
|
|
|
|
// If buffers are equal, there shall be no mismatch
|
|
Assert.assertEquals(bt.mismatch(as, bs), -1);
|
|
Assert.assertEquals(bt.mismatch(bs, as), -1);
|
|
}
|
|
else {
|
|
int aCb = bt.compare(as, bs);
|
|
int bCa = bt.compare(bs, as);
|
|
int v = Integer.signum(aCb) * Integer.signum(bCa);
|
|
Assert.assertTrue(v == -1);
|
|
|
|
int aMs = bt.mismatch(as, bs);
|
|
int bMs = bt.mismatch(bs, as);
|
|
Assert.assertNotEquals(aMs, -1);
|
|
Assert.assertEquals(aMs, bMs);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (aLength > 0 && !a.isReadOnly()) {
|
|
for (int i = aFrom; i < aTo; i++) {
|
|
B c = aConstructor.apply(bt, a.capacity());
|
|
B cs = aLength != s
|
|
? bt.slice(c, aFrom, aTo, dupOtherwiseSlice)
|
|
: c;
|
|
|
|
// Create common prefix with a length of i - aFrom
|
|
bt.set(c, i, -1);
|
|
|
|
Assert.assertFalse(bt.equals(c, a));
|
|
|
|
int cCa = bt.compare(cs, as);
|
|
int aCc = bt.compare(as, cs);
|
|
int v = Integer.signum(cCa) * Integer.signum(aCc);
|
|
Assert.assertTrue(v == -1);
|
|
|
|
int cMa = bt.mismatch(cs, as);
|
|
int aMc = bt.mismatch(as, cs);
|
|
Assert.assertEquals(cMa, aMc);
|
|
Assert.assertEquals(cMa, i - aFrom);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int[] ranges(int from, int to) {
|
|
int width = to - from;
|
|
switch (width) {
|
|
case 0:
|
|
return new int[]{};
|
|
case 1:
|
|
return new int[]{from, to};
|
|
case 2:
|
|
return new int[]{from, from + 1, to};
|
|
case 3:
|
|
return new int[]{from, from + 1, from + 2, to};
|
|
default:
|
|
return IntStream.of(from, from + 1, from + 2, to / 2 - 1, to / 2, to / 2 + 1, to - 2, to - 1, to)
|
|
.filter(i -> i >= from && i <= to)
|
|
.distinct().toArray();
|
|
}
|
|
}
|
|
|
|
@Test
|
|
void testHashCode() throws IOException {
|
|
byte[] bytes = "hello world".getBytes(UTF_8);
|
|
Path path = Files.createTempFile("", "");
|
|
Files.write(path, bytes);
|
|
try (FileChannel fc = FileChannel.open(path, READ, DELETE_ON_CLOSE)) {
|
|
MappedByteBuffer one = fc.map(FileChannel.MapMode.READ_ONLY, 0, bytes.length);
|
|
ByteBuffer two = ByteBuffer.wrap(bytes);
|
|
Assert.assertEquals(one, two);
|
|
Assert.assertEquals(one.hashCode(), two.hashCode());
|
|
}
|
|
}
|
|
}
|