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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.
*/
package libcore.io;
import dalvik.system.VMRuntime;
import junit.framework.TestCase;
public class MemoryTest extends TestCase {
public void testSetIntArray() {
int[] values = { 3, 7, 31, 127, 8191, 131071, 524287, 2147483647 };
int[] swappedValues = new int[values.length];
for (int i = 0; i < values.length; ++i) {
swappedValues[i] = Integer.reverseBytes(values[i]);
}
int scale = 4;
VMRuntime runtime = VMRuntime.getRuntime();
byte[] array = (byte[]) runtime.newNonMovableArray(byte.class, scale * values.length);
int ptr = (int) runtime.addressOf(array);
// Regular copy.
Memory.pokeIntArray(ptr, values, 0, values.length, false);
assertIntsEqual(values, ptr, false);
assertIntsEqual(swappedValues, ptr, true);
// Swapped copy.
Memory.pokeIntArray(ptr, values, 0, values.length, true);
assertIntsEqual(values, ptr, true);
assertIntsEqual(swappedValues, ptr, false);
// Swapped copies of slices (to ensure we test non-zero offsets).
for (int i = 0; i < values.length; ++i) {
Memory.pokeIntArray(ptr + i * scale, values, i, 1, true);
}
assertIntsEqual(values, ptr, true);
assertIntsEqual(swappedValues, ptr, false);
}
private void assertIntsEqual(int[] expectedValues, int ptr, boolean swap) {
for (int i = 0; i < expectedValues.length; ++i) {
assertEquals(expectedValues[i], Memory.peekInt(ptr + 4 * i, swap));
}
}
public void testSetShortArray() {
short[] values = { 0x0001, 0x0020, 0x0300, 0x4000 };
short[] swappedValues = { 0x0100, 0x2000, 0x0003, 0x0040 };
int scale = 2;
VMRuntime runtime = VMRuntime.getRuntime();
byte[] array = (byte[]) runtime.newNonMovableArray(byte.class, scale * values.length);
int ptr = (int) runtime.addressOf(array);
// Regular copy. Memset first so we start from a known state.
Memory.pokeShortArray(ptr, values, 0, values.length, false);
assertShortsEqual(values, ptr, false);
assertShortsEqual(swappedValues, ptr, true);
// Swapped copy.
Memory.pokeShortArray(ptr, values, 0, values.length, true);
assertShortsEqual(values, ptr, true);
assertShortsEqual(swappedValues, ptr, false);
// Swapped copies of slices (to ensure we test non-zero offsets).
for (int i = 0; i < values.length; ++i) {
Memory.pokeShortArray(ptr + i * scale, values, i, 1, true);
}
assertShortsEqual(values, ptr, true);
assertShortsEqual(swappedValues, ptr, false);
}
private void assertShortsEqual(short[] expectedValues, int ptr, boolean swap) {
for (int i = 0; i < expectedValues.length; ++i) {
assertEquals(expectedValues[i], Memory.peekShort(ptr + 2 * i, swap));
}
}
}
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