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jdk-24/test/jdk/java/nio/Buffer/BasicChar.java
Jorn Vernee 9c852df6aa 8318966: Some methods make promises about Java array element alignment that are too strong 
Reviewed-by: psandoz, mcimadamore
2024-02-14 14:30:54 +00:00

1228 lines
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Java
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/*
* Copyright (c) 2003, 2023, 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.
*/
/* Type-specific source code for unit test
*
* Regenerate the BasicX classes via genBasic.sh whenever this file changes.
* We check in the generated source files so that the test tree can be used
* independently of the rest of the source tree.
*/
// -- This file was mechanically generated: Do not edit! -- //
import java.nio.*;
import java.util.function.IntFunction;
public class BasicChar
extends Basic
{
private static final char[] VALUES = {
Character.MIN_VALUE,
(char) -1,
(char) 0,
(char) 1,
Character.MAX_VALUE,
};
private static void relGet(CharBuffer b) {
int n = b.capacity();
for (int i = 0; i < n; i++)
ck(b, (long)b.get(), (long)((char)ic(i)));
b.rewind();
}
private static void relGet(CharBuffer b, int start) {
int n = b.remaining();
for (int i = start; i < n; i++)
ck(b, (long)b.get(), (long)((char)ic(i)));
b.rewind();
}
private static void absGet(CharBuffer b) {
int n = b.capacity();
for (int i = 0; i < n; i++)
ck(b, (long)b.get(), (long)((char)ic(i)));
b.rewind();
}
private static void bulkGet(CharBuffer b) {
int n = b.capacity();
char[] a = new char[n + 7];
b.get(a, 7, n);
for (int i = 0; i < n; i++) {
ck(b, (long)a[i + 7], (long)((char)ic(i)));
}
}
private static void absBulkGet(CharBuffer b) {
int n = b.capacity();
int len = n - 7*2;
char[] a = new char[n + 7];
b.position(42);
b.get(7, a, 7, len);
ck(b, b.position() == 42);
for (int i = 0; i < len; i++) {
ck(b, (long)a[i + 7], (long)((char)ic(i)));
}
}
private static void relPut(CharBuffer b) {
int n = b.capacity();
b.clear();
for (int i = 0; i < n; i++)
b.put((char)ic(i));
b.flip();
}
private static void absPut(CharBuffer b) {
int n = b.capacity();
b.clear();
for (int i = 0; i < n; i++)
b.put(i, (char)ic(i));
b.limit(n);
b.position(0);
}
private static void bulkPutArray(CharBuffer b) {
int n = b.capacity();
b.clear();
char[] a = new char[n + 7];
for (int i = 0; i < n; i++)
a[i + 7] = (char)ic(i);
b.put(a, 7, n);
b.flip();
}
private static void bulkPutBuffer(CharBuffer b) {
int n = b.capacity();
b.clear();
CharBuffer c = CharBuffer.allocate(n + 7);
c.position(7);
for (int i = 0; i < n; i++)
c.put((char)ic(i));
c.flip();
c.position(7);
b.put(c);
b.flip();
try {
b.put(b);
fail("IllegalArgumentException expected for put into same buffer");
} catch (IllegalArgumentException e) {
if (e.getMessage() == null) {
fail("Non-null IllegalArgumentException message expected from"
+ " put into same buffer");
}
}
}
private static void absBulkPutArray(CharBuffer b) {
int n = b.capacity();
b.clear();
int lim = n - 7;
int len = lim - 7;
b.limit(lim);
char[] a = new char[len + 7];
for (int i = 0; i < len; i++)
a[i + 7] = (char)ic(i);
b.position(42);
b.put(7, a, 7, len);
ck(b, b.position() == 42);
}
//6231529
private static void callReset(CharBuffer b) {
b.position(0);
b.mark();
b.duplicate().reset();
b.asReadOnlyBuffer().reset();
}
// 6221101-6234263
private static void putBuffer() {
final int cap = 10;
CharBuffer direct1 = ByteBuffer.allocateDirect(cap).asCharBuffer();
CharBuffer nondirect1 = ByteBuffer.allocate(cap).asCharBuffer();
direct1.put(nondirect1);
CharBuffer direct2 = ByteBuffer.allocateDirect(cap).asCharBuffer();
CharBuffer nondirect2 = ByteBuffer.allocate(cap).asCharBuffer();
nondirect2.put(direct2);
CharBuffer direct3 = ByteBuffer.allocateDirect(cap).asCharBuffer();
CharBuffer direct4 = ByteBuffer.allocateDirect(cap).asCharBuffer();
direct3.put(direct4);
CharBuffer nondirect3 = ByteBuffer.allocate(cap).asCharBuffer();
CharBuffer nondirect4 = ByteBuffer.allocate(cap).asCharBuffer();
nondirect3.put(nondirect4);
}
private static void bulkPutString(CharBuffer b) {
int n = b.capacity();
b.clear();
StringBuilder sb = new StringBuilder(n + 7);
sb.append("1234567");
for (int i = 0; i < n; i++)
sb.append((char)ic(i));
b.put(sb.toString(), 7, 7 + n);
b.flip();
}
private static void checkSlice(CharBuffer b, CharBuffer slice) {
ck(slice, 0, slice.position());
ck(slice, b.remaining(), slice.limit());
ck(slice, b.remaining(), slice.capacity());
if (b.isDirect() != slice.isDirect())
fail("Lost direction", slice);
if (b.isReadOnly() != slice.isReadOnly())
fail("Lost read-only", slice);
}
private static void fail(String problem,
CharBuffer xb, CharBuffer yb,
char x, char y) {
fail(problem + String.format(": x=%s y=%s", x, y), xb, yb);
}
private static void catchNullArgument(Buffer b, Runnable thunk) {
tryCatch(b, NullPointerException.class, thunk);
}
private static void catchIllegalArgument(Buffer b, Runnable thunk) {
tryCatch(b, IllegalArgumentException.class, thunk);
}
private static void catchReadOnlyBuffer(Buffer b, Runnable thunk) {
tryCatch(b, ReadOnlyBufferException.class, thunk);
}
private static void catchIndexOutOfBounds(Buffer b, Runnable thunk) {
tryCatch(b, IndexOutOfBoundsException.class, thunk);
}
private static void catchIndexOutOfBounds(char[] t, Runnable thunk) {
tryCatch(t, IndexOutOfBoundsException.class, thunk);
}
private static void tryCatch(Buffer b, Class<?> ex, Runnable thunk) {
boolean caught = false;
try {
thunk.run();
} catch (Throwable x) {
if (ex.isAssignableFrom(x.getClass())) {
caught = true;
} else {
String s = x.getMessage();
if (s == null)
s = x.getClass().getName();
fail(s + " not expected");
}
}
if (!caught) {
fail(ex.getName() + " not thrown", b);
}
}
private static void tryCatch(char[] t, Class<?> ex, Runnable thunk) {
tryCatch(CharBuffer.wrap(t), ex, thunk);
}
public static void test(int level, final CharBuffer b, boolean direct) {
show(level, b);
if (direct != b.isDirect())
fail("Wrong direction", b);
// Gets and puts
relPut(b);
relGet(b);
absGet(b);
bulkGet(b);
absPut(b);
relGet(b);
absGet(b);
bulkGet(b);
bulkPutArray(b);
relGet(b);
bulkPutBuffer(b);
relGet(b);
absBulkPutArray(b);
absBulkGet(b);
// 8306623 and 8306959
String str = "in violet night walking beneath a reign of uncouth stars";
char[] chars = str.toCharArray();
int cslen = chars.length;
CharSequence[] csqs = new CharSequence[] {
str,
new StringBuffer(str),
new StringBuilder(str),
CharBuffer.wrap(chars),
ByteBuffer.allocateDirect(2*chars.length).asCharBuffer()
};
int[][] bounds = new int[][] {
{-1, cslen}, // negative start
{0, -1}, // negative end
{1, 0}, // start > end
{cslen/2, cslen + 1} // end > cslen
};
IntFunction<CharBuffer>[] producers = new IntFunction[] {
(i) -> CharBuffer.allocate(i),
(i) -> ByteBuffer.allocateDirect(2*i).asCharBuffer()
};
for (IntFunction<CharBuffer> f : producers) {
for (CharSequence csq : csqs) {
// append() should throw BufferOverflowException
final CharBuffer cbBOE = f.apply(cslen/8);
tryCatch(cbBOE, BufferOverflowException.class, () ->
cbBOE.append(csq, cslen/4, cslen/2));
CharBuffer cb = f.apply(7);
tryCatch(cbBOE, BufferOverflowException.class, () ->
cb.append(csq.subSequence(0, 8), 0, 8));
// append() should throw IndexOutOfBoundsException
final CharBuffer cbIOOBE = f.apply(cslen + 1);
for (int[] bds : bounds)
tryCatch(cbIOOBE, IndexOutOfBoundsException.class, () ->
cbIOOBE.append(csq, bds[0], bds[1]));
tryCatch(cb, IndexOutOfBoundsException.class, () ->
cb.append(csq.subSequence(0, 8), 4, 12));
// should append nothing
int rem = cb.remaining();
ck(cb, cb.append(csq, 0, 0).remaining(), rem);
// should fill the buffer
int start = (csq.length() - rem)/2;
ck(cb, cb.append(csq, start, start + rem).remaining(), 0);
}
}
// end 8306623 and 8306959
bulkPutString(b);
relGet(b);
b.position(1);
b.limit(7);
ck(b, b.toString().equals("bcdefg"));
// CharSequence ops
b.position(2);
ck(b, b.charAt(1), 'd');
CharBuffer c = b.subSequence(1, 4);
ck(c, c.capacity(), b.capacity());
ck(c, c.position(), b.position()+1);
ck(c, c.limit(), b.position()+4);
ck(c, b.subSequence(1, 4).toString().equals("def"));
// 4938424
b.position(4);
ck(b, b.charAt(1), 'f');
ck(b, b.subSequence(1, 3).toString().equals("fg"));
// String ops
// 7190219
b.clear();
int pos = b.position();
tryCatch(b, BufferOverflowException.class, () ->
b.put(String.valueOf(new char[b.capacity() + 1]), 0, b.capacity() + 1)
);
ck(b, b.position(), pos);
relGet(b);
// Compact
relPut(b);
b.position(13);
b.compact();
b.flip();
relGet(b, 13);
// Exceptions
relPut(b);
b.limit(b.capacity() / 2);
b.position(b.limit());
tryCatch(b, BufferUnderflowException.class, () -> b.get());
tryCatch(b, BufferOverflowException.class, () -> b.put((char)42));
// The index must be non-negative and less than the buffer's limit.
catchIndexOutOfBounds(b, () -> b.get(b.limit()));
catchIndexOutOfBounds(b, () -> b.get(-1));
catchIndexOutOfBounds(b, () -> b.put(b.limit(), (char)42));
tryCatch(b, InvalidMarkException.class,
() -> b.position(0).mark().compact().reset());
try {
b.position(b.limit() + 1);
fail("IllegalArgumentException expected for position beyond limit");
} catch (IllegalArgumentException e) {
if (e.getMessage() == null) {
fail("Non-null IllegalArgumentException message expected for"
+ " position beyond limit");
}
}
try {
b.position(-1);
fail("IllegalArgumentException expected for negative position");
} catch (IllegalArgumentException e) {
if (e.getMessage() == null) {
fail("Non-null IllegalArgumentException message expected for"
+ " negative position");
}
}
try {
b.limit(b.capacity() + 1);
fail("IllegalArgumentException expected for limit beyond capacity");
} catch (IllegalArgumentException e) {
if (e.getMessage() == null) {
fail("Non-null IllegalArgumentException message expected for"
+ " limit beyond capacity");
}
}
try {
b.limit(-1);
fail("IllegalArgumentException expected for negative limit");
} catch (IllegalArgumentException e) {
if (e.getMessage() == null) {
fail("Non-null IllegalArgumentException message expected for"
+ " negative limit");
}
}
// Exceptions in absolute bulk and slice operations
catchNullArgument(b, () -> b.get(7, null, 0, 42));
catchNullArgument(b, () -> b.put(7, (char[])null, 0, 42));
char[] tmpa = new char[42];
catchIndexOutOfBounds(b, () -> b.get(7, tmpa, -1, 42));
catchIndexOutOfBounds(b, () -> b.get(7, tmpa, 42, 1));
catchIndexOutOfBounds(b, () -> b.get(7, tmpa, 41, -1));
catchIndexOutOfBounds(b, () -> b.get(-1, tmpa, 0, 1));
catchIndexOutOfBounds(b, () -> b.get(b.limit(), tmpa, 0, 1));
catchIndexOutOfBounds(b, () -> b.get(b.limit() - 41, tmpa, 0, 42));
catchIndexOutOfBounds(b, () -> b.put(7, tmpa, -1, 42));
catchIndexOutOfBounds(b, () -> b.put(7, tmpa, 42, 1));
catchIndexOutOfBounds(b, () -> b.put(7, tmpa, 41, -1));
catchIndexOutOfBounds(b, () -> b.put(-1, tmpa, 0, 1));
catchIndexOutOfBounds(b, () -> b.put(b.limit(), tmpa, 0, 1));
catchIndexOutOfBounds(b, () -> b.put(b.limit() - 41, tmpa, 0, 42));
catchIndexOutOfBounds(b, () -> b.slice(-1, 7));
catchIndexOutOfBounds(b, () -> b.slice(b.limit() + 1, 7));
catchIndexOutOfBounds(b, () -> b.slice(0, -1));
catchIndexOutOfBounds(b, () -> b.slice(7, b.limit() - 7 + 1));
// Values
b.clear();
b.put((char)0);
b.put((char)-1);
b.put((char)1);
b.put(Character.MAX_VALUE);
b.put(Character.MIN_VALUE);
b.flip();
ck(b, b.get(), 0);
ck(b, b.get(), (char)-1);
ck(b, b.get(), 1);
ck(b, b.get(), Character.MAX_VALUE);
ck(b, b.get(), Character.MIN_VALUE);
// Comparison
b.rewind();
CharBuffer b2 = CharBuffer.allocate(b.capacity());
b2.put(b);
b2.flip();
b.position(2);
b2.position(2);
if (!b.equals(b2)) {
for (int i = 2; i < b.limit(); i++) {
char x = b.get(i);
char y = b2.get(i);
if (x != y
) {
out.println("[" + i + "] " + x + " != " + y);
}
}
fail("Identical buffers not equal", b, b2);
}
if (b.compareTo(b2) != 0) {
fail("Comparison to identical buffer != 0", b, b2);
}
b.limit(b.limit() + 1);
b.position(b.limit() - 1);
b.put((char)99);
b.rewind();
b2.rewind();
if (b.equals(b2))
fail("Non-identical buffers equal", b, b2);
if (b.compareTo(b2) <= 0)
fail("Comparison to shorter buffer <= 0", b, b2);
b.limit(b.limit() - 1);
b.put(2, (char)42);
if (b.equals(b2))
fail("Non-identical buffers equal", b, b2);
if (b.compareTo(b2) <= 0)
fail("Comparison to lesser buffer <= 0", b, b2);
// Check equals and compareTo with interesting values
for (char x : VALUES) {
CharBuffer xb = CharBuffer.wrap(new char[] { x });
if (xb.compareTo(xb) != 0) {
fail("compareTo not reflexive", xb, xb, x, x);
}
if (!xb.equals(xb)) {
fail("equals not reflexive", xb, xb, x, x);
}
for (char y : VALUES) {
CharBuffer yb = CharBuffer.wrap(new char[] { y });
if (xb.compareTo(yb) != - yb.compareTo(xb)) {
fail("compareTo not anti-symmetric",
xb, yb, x, y);
}
if ((xb.compareTo(yb) == 0) != xb.equals(yb)) {
fail("compareTo inconsistent with equals",
xb, yb, x, y);
}
if (xb.compareTo(yb) != Character.compare(x, y)) {
fail("Incorrect results for CharBuffer.compareTo",
xb, yb, x, y);
}
if (xb.equals(yb) != ((x == y) || ((x != x) && (y != y)))) {
fail("Incorrect results for CharBuffer.equals",
xb, yb, x, y);
}
}
}
// Sub, dup
relPut(b);
relGet(b.duplicate());
b.position(13);
relGet(b.duplicate(), 13);
relGet(b.duplicate().slice(), 13);
relGet(b.slice(), 13);
relGet(b.slice().duplicate(), 13);
// Slice
b.position(5);
CharBuffer sb = b.slice();
checkSlice(b, sb);
b.position(0);
CharBuffer sb2 = sb.slice();
checkSlice(sb, sb2);
if (!sb.equals(sb2))
fail("Sliced slices do not match", sb, sb2);
if ((sb.hasArray()) && (sb.arrayOffset() != sb2.arrayOffset())) {
fail("Array offsets do not match: "
+ sb.arrayOffset() + " != " + sb2.arrayOffset(), sb, sb2);
}
int bPos = b.position();
int bLim = b.limit();
b.position(7);
b.limit(42);
CharBuffer rsb = b.slice();
b.position(0);
b.limit(b.capacity());
CharBuffer asb = b.slice(7, 35);
checkSlice(rsb, asb);
b.position(bPos);
b.limit(bLim);
// Read-only views
b.rewind();
final CharBuffer rb = b.asReadOnlyBuffer();
if (!b.equals(rb))
fail("Buffer not equal to read-only view", b, rb);
show(level + 1, rb);
catchReadOnlyBuffer(b, () -> relPut(rb));
catchReadOnlyBuffer(b, () -> absPut(rb));
catchReadOnlyBuffer(b, () -> bulkPutArray(rb));
catchReadOnlyBuffer(b, () -> bulkPutBuffer(rb));
catchReadOnlyBuffer(b, () -> absBulkPutArray(rb));
// put(CharBuffer) should not change source position
final CharBuffer src = CharBuffer.allocate(1);
catchReadOnlyBuffer(b, () -> rb.put(src));
ck(src, src.position(), 0);
catchReadOnlyBuffer(b, () -> rb.compact());
// 7199551
catchReadOnlyBuffer(b, () -> rb.put(new String(new char[rb.remaining() + 1])));
catchReadOnlyBuffer(b, () -> rb.append(new String(new char[rb.remaining() + 1])));
if (rb.getClass().getName().startsWith("java.nio.Heap")) {
catchReadOnlyBuffer(b, () -> rb.array());
catchReadOnlyBuffer(b, () -> rb.arrayOffset());
if (rb.hasArray()) {
fail("Read-only heap buffer's backing array is accessible", rb);
}
}
// Bulk puts from read-only buffers
b.clear();
rb.rewind();
b.put(rb);
relPut(b); // Required by testViews
}
private static void testStr() {
final String s = "abcdefghijklm";
int start = 3;
int end = 9;
final CharBuffer b = CharBuffer.wrap(s, start, end);
show(0, b);
ck(b, b.toString().equals(s.substring(start, end)));
ck(b, b.toString().equals("defghi"));
ck(b, b.isReadOnly());
catchReadOnlyBuffer(b, () -> b.put('x'));
ck(b, start, b.position());
ck(b, end, b.limit());
ck(b, s.length(), b.capacity());
b.position(6);
ck(b, b.subSequence(0,3).toString().equals("ghi"));
// absolute bulk get
char[] c = new char[end + 1 - (start - 1) + 1]; // [start - 1, end + 1]
b.limit(end + 2);
b.get(start - 1, c, 0, c.length);
for (int i = 0; i < c.length; i++)
ck(b, c[i], s.charAt(start - 1 + i));
// The index, relative to the position, must be non-negative and
// smaller than remaining().
catchIndexOutOfBounds(b, () -> b.charAt(-1));
catchIndexOutOfBounds(b, () -> b.charAt(b.remaining()));
// The index must be non-negative and less than the buffer's limit.
catchIndexOutOfBounds(b, () -> b.get(b.limit()));
catchIndexOutOfBounds(b, () -> b.get(-1));
// The start must be non-negative and no larger than remaining().
catchIndexOutOfBounds(b, () -> b.subSequence(-1, b.remaining()));
catchIndexOutOfBounds(b, () -> b.subSequence(b.remaining() + 1, b.remaining()));
// The end must be no smaller than start and no larger than
// remaining().
catchIndexOutOfBounds(b, () -> b.subSequence(2, 1));
catchIndexOutOfBounds(b, () -> b.subSequence(0, b.remaining() + 1));
// The offset must be non-negative and no larger than <array.length>.
catchIndexOutOfBounds(b, () -> CharBuffer.wrap(s, -1, s.length()));
catchIndexOutOfBounds(b, () -> CharBuffer.wrap(s, s.length() + 1, s.length()));
catchIndexOutOfBounds(b, () -> CharBuffer.wrap(s, 1, 0));
catchIndexOutOfBounds(b, () -> CharBuffer.wrap(s, 0, s.length() + 1));
}
public static void test(final char [] ba) {
int offset = 47;
int length = 900;
final CharBuffer b = CharBuffer.wrap(ba, offset, length);
show(0, b);
ck(b, b.capacity(), ba.length);
ck(b, b.position(), offset);
ck(b, b.limit(), offset + length);
// The offset must be non-negative and no larger than <array.length>.
catchIndexOutOfBounds(ba, () -> CharBuffer.wrap(ba, -1, ba.length));
catchIndexOutOfBounds(ba, () -> CharBuffer.wrap(ba, ba.length + 1, ba.length));
catchIndexOutOfBounds(ba, () -> CharBuffer.wrap(ba, 0, -1));
catchIndexOutOfBounds(ba, () -> CharBuffer.wrap(ba, 0, ba.length + 1));
// A NullPointerException will be thrown if the array is null.
tryCatch(ba, NullPointerException.class,
() -> CharBuffer.wrap((char []) null, 0, 5));
tryCatch(ba, NullPointerException.class,
() -> CharBuffer.wrap((char []) null));
}
private static void testAllocate() {
// An IllegalArgumentException will be thrown for negative capacities.
catchIllegalArgument((Buffer) null, () -> CharBuffer.allocate(-1));
try {
CharBuffer.allocate(-1);
} catch (IllegalArgumentException e) {
if (e.getMessage() == null) {
fail("Non-null IllegalArgumentException message expected for"
+ " attempt to allocate negative capacity buffer");
}
}
}
public static void testToString() {
final int cap = 10;
}
public static void test() {
testAllocate();
test(0, CharBuffer.allocate(7 * 1024), false);
test(0, CharBuffer.wrap(new char[7 * 1024], 0, 7 * 1024), false);
test(new char[1024]);
testStr();
callReset(CharBuffer.allocate(10));
putBuffer();
testToString();
}
}
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