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/*
* DSI utilities
*
* Copyright (C) 2010-2023 Sebastiano Vigna
*
* This program and the accompanying materials are made available under the
* terms of the GNU Lesser General Public License v2.1 or later,
* which is available at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1-standalone.html,
* or the Apache Software License 2.0, which is available at
* https://www.apache.org/licenses/LICENSE-2.0.
*
* This program 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.
*
* SPDX-License-Identifier: LGPL-2.1-or-later OR Apache-2.0
*/
package it.unimi.dsi.bits;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
public class RawByteArrayTransformationStrategyTest {
@Test
public void testGetLong() {
byte[] a = new byte[] { 0x55, (byte)0xFF };
assertEquals(16, TransformationStrategies.rawByteArray().toBitVector(a).length());
assertEquals(0xFF55L, TransformationStrategies.rawByteArray().toBitVector(a).getLong(0, 16));
a = new byte[] { 1, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1, -1, -1, -1, -1, 0 };
assertTrue(TransformationStrategies.rawByteArray().toBitVector(a).getBoolean(0));
assertFalse(TransformationStrategies.rawByteArray().toBitVector(a).getBoolean(1));
assertTrue(TransformationStrategies.rawByteArray().toBitVector(a).getBoolean(64));
assertEquals(0x1L, TransformationStrategies.rawByteArray().toBitVector(a).getLong(0, 56));
assertEquals(0x1L, TransformationStrategies.rawByteArray().toBitVector(a).getLong(0, 64));
assertEquals(-1L, TransformationStrategies.rawByteArray().toBitVector(a).getLong(64, 128));
for(int i = 1; i < 64; i++)
assertEquals(1, TransformationStrategies.rawByteArray().toBitVector(a).getLong(0, i));
for(int i = 0; i < 63; i++)
assertEquals(0, TransformationStrategies.rawByteArray().toBitVector(a).getLong(1, 1 + i));
for(int i = 64; i < 127; i++)
assertEquals((1L << i - 64) - 1, TransformationStrategies.rawByteArray().toBitVector(a).getLong(64, i));
a = new byte[] { 1, 0, 0, 0, 0, 0, 0, 0, 0x55 };
assertEquals(0x55L << 57, TransformationStrategies.rawByteArray().toBitVector(a).getLong(7, 71));
assertEquals(0x15L << 57, TransformationStrategies.rawByteArray().toBitVector(a).getLong(7, 70));
assertEquals(0x15L << 57, TransformationStrategies.rawByteArray().toBitVector(a).getLong(7, 69));
}
}
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