| /* |
| * Copyright (C) 2008, 2015 Google Inc. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.util; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import org.junit.Test; |
| |
| public class NBTest { |
| @Test |
| public void testCompareUInt32() { |
| assertTrue(NB.compareUInt32(0, 0) == 0); |
| assertTrue(NB.compareUInt32(1, 0) > 0); |
| assertTrue(NB.compareUInt32(0, 1) < 0); |
| assertTrue(NB.compareUInt32(-1, 0) > 0); |
| assertTrue(NB.compareUInt32(0, -1) < 0); |
| assertTrue(NB.compareUInt32(-1, 1) > 0); |
| assertTrue(NB.compareUInt32(1, -1) < 0); |
| } |
| |
| @Test |
| public void testCompareUInt64() { |
| assertTrue(NB.compareUInt64(0, 0) == 0); |
| assertTrue(NB.compareUInt64(1, 0) > 0); |
| assertTrue(NB.compareUInt64(0, 1) < 0); |
| assertTrue(NB.compareUInt64(-1, 0) > 0); |
| assertTrue(NB.compareUInt64(0, -1) < 0); |
| assertTrue(NB.compareUInt64(-1, 1) > 0); |
| assertTrue(NB.compareUInt64(1, -1) < 0); |
| } |
| |
| @Test |
| public void testDecodeUInt16() { |
| assertEquals(0, NB.decodeUInt16(b(0, 0), 0)); |
| assertEquals(0, NB.decodeUInt16(padb(3, 0, 0), 3)); |
| |
| assertEquals(3, NB.decodeUInt16(b(0, 3), 0)); |
| assertEquals(3, NB.decodeUInt16(padb(3, 0, 3), 3)); |
| |
| assertEquals(0xde03, NB.decodeUInt16(b(0xde, 3), 0)); |
| assertEquals(0xde03, NB.decodeUInt16(padb(3, 0xde, 3), 3)); |
| |
| assertEquals(0x03de, NB.decodeUInt16(b(3, 0xde), 0)); |
| assertEquals(0x03de, NB.decodeUInt16(padb(3, 3, 0xde), 3)); |
| |
| assertEquals(0xffff, NB.decodeUInt16(b(0xff, 0xff), 0)); |
| assertEquals(0xffff, NB.decodeUInt16(padb(3, 0xff, 0xff), 3)); |
| } |
| |
| @Test |
| public void testDecodeUInt24() { |
| assertEquals(0, NB.decodeUInt24(b(0, 0, 0), 0)); |
| assertEquals(0, NB.decodeUInt24(padb(3, 0, 0, 0), 3)); |
| |
| assertEquals(3, NB.decodeUInt24(b(0, 0, 3), 0)); |
| assertEquals(3, NB.decodeUInt24(padb(3, 0, 0, 3), 3)); |
| |
| assertEquals(0xcede03, NB.decodeUInt24(b(0xce, 0xde, 3), 0)); |
| assertEquals(0xbade03, NB.decodeUInt24(padb(3, 0xba, 0xde, 3), 3)); |
| |
| assertEquals(0x03bade, NB.decodeUInt24(b(3, 0xba, 0xde), 0)); |
| assertEquals(0x03bade, NB.decodeUInt24(padb(3, 3, 0xba, 0xde), 3)); |
| |
| assertEquals(0xffffff, NB.decodeUInt24(b(0xff, 0xff, 0xff), 0)); |
| assertEquals(0xffffff, NB.decodeUInt24(padb(3, 0xff, 0xff, 0xff), 3)); |
| } |
| |
| @Test |
| public void testDecodeInt32() { |
| assertEquals(0, NB.decodeInt32(b(0, 0, 0, 0), 0)); |
| assertEquals(0, NB.decodeInt32(padb(3, 0, 0, 0, 0), 3)); |
| |
| assertEquals(3, NB.decodeInt32(b(0, 0, 0, 3), 0)); |
| assertEquals(3, NB.decodeInt32(padb(3, 0, 0, 0, 3), 3)); |
| |
| assertEquals(0xdeadbeef, NB.decodeInt32(b(0xde, 0xad, 0xbe, 0xef), 0)); |
| assertEquals(0xdeadbeef, NB.decodeInt32( |
| padb(3, 0xde, 0xad, 0xbe, 0xef), 3)); |
| |
| assertEquals(0x0310adef, NB.decodeInt32(b(0x03, 0x10, 0xad, 0xef), 0)); |
| assertEquals(0x0310adef, NB.decodeInt32( |
| padb(3, 0x03, 0x10, 0xad, 0xef), 3)); |
| |
| assertEquals(0xffffffff, NB.decodeInt32(b(0xff, 0xff, 0xff, 0xff), 0)); |
| assertEquals(0xffffffff, NB.decodeInt32( |
| padb(3, 0xff, 0xff, 0xff, 0xff), 3)); |
| } |
| |
| @Test |
| public void testDecodeUInt32() { |
| assertEquals(0L, NB.decodeUInt32(b(0, 0, 0, 0), 0)); |
| assertEquals(0L, NB.decodeUInt32(padb(3, 0, 0, 0, 0), 3)); |
| |
| assertEquals(3L, NB.decodeUInt32(b(0, 0, 0, 3), 0)); |
| assertEquals(3L, NB.decodeUInt32(padb(3, 0, 0, 0, 3), 3)); |
| |
| assertEquals(0xdeadbeefL, NB.decodeUInt32(b(0xde, 0xad, 0xbe, 0xef), 0)); |
| assertEquals(0xdeadbeefL, NB.decodeUInt32(padb(3, 0xde, 0xad, 0xbe, |
| 0xef), 3)); |
| |
| assertEquals(0x0310adefL, NB.decodeUInt32(b(0x03, 0x10, 0xad, 0xef), 0)); |
| assertEquals(0x0310adefL, NB.decodeUInt32(padb(3, 0x03, 0x10, 0xad, |
| 0xef), 3)); |
| |
| assertEquals(0xffffffffL, NB.decodeUInt32(b(0xff, 0xff, 0xff, 0xff), 0)); |
| assertEquals(0xffffffffL, NB.decodeUInt32(padb(3, 0xff, 0xff, 0xff, |
| 0xff), 3)); |
| } |
| |
| @Test |
| public void testDecodeUInt64() { |
| assertEquals(0L, NB.decodeUInt64(b(0, 0, 0, 0, 0, 0, 0, 0), 0)); |
| assertEquals(0L, NB.decodeUInt64(padb(3, 0, 0, 0, 0, 0, 0, 0, 0), 3)); |
| |
| assertEquals(3L, NB.decodeUInt64(b(0, 0, 0, 0, 0, 0, 0, 3), 0)); |
| assertEquals(3L, NB.decodeUInt64(padb(3, 0, 0, 0, 0, 0, 0, 0, 3), 3)); |
| |
| assertEquals(0xdeadbeefL, NB.decodeUInt64(b(0, 0, 0, 0, 0xde, 0xad, |
| 0xbe, 0xef), 0)); |
| assertEquals(0xdeadbeefL, NB.decodeUInt64(padb(3, 0, 0, 0, 0, 0xde, |
| 0xad, 0xbe, 0xef), 3)); |
| |
| assertEquals(0x0310adefL, NB.decodeUInt64(b(0, 0, 0, 0, 0x03, 0x10, |
| 0xad, 0xef), 0)); |
| assertEquals(0x0310adefL, NB.decodeUInt64(padb(3, 0, 0, 0, 0, 0x03, |
| 0x10, 0xad, 0xef), 3)); |
| |
| assertEquals(0xc0ffee78deadbeefL, NB.decodeUInt64(b(0xc0, 0xff, 0xee, |
| 0x78, 0xde, 0xad, 0xbe, 0xef), 0)); |
| assertEquals(0xc0ffee78deadbeefL, NB.decodeUInt64(padb(3, 0xc0, 0xff, |
| 0xee, 0x78, 0xde, 0xad, 0xbe, 0xef), 3)); |
| |
| assertEquals(0x00000000ffffffffL, NB.decodeUInt64(b(0, 0, 0, 0, 0xff, |
| 0xff, 0xff, 0xff), 0)); |
| assertEquals(0x00000000ffffffffL, NB.decodeUInt64(padb(3, 0, 0, 0, 0, |
| 0xff, 0xff, 0xff, 0xff), 3)); |
| assertEquals(0xffffffffffffffffL, NB.decodeUInt64(b(0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff), 0)); |
| assertEquals(0xffffffffffffffffL, NB.decodeUInt64(padb(3, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff), 3)); |
| } |
| |
| @Test |
| public void testEncodeInt16() { |
| final byte[] out = new byte[16]; |
| |
| prepareOutput(out); |
| NB.encodeInt16(out, 0, 0); |
| assertOutput(b(0, 0), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt16(out, 3, 0); |
| assertOutput(b(0, 0), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt16(out, 0, 3); |
| assertOutput(b(0, 3), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt16(out, 3, 3); |
| assertOutput(b(0, 3), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt16(out, 0, 0xdeac); |
| assertOutput(b(0xde, 0xac), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt16(out, 3, 0xdeac); |
| assertOutput(b(0xde, 0xac), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt16(out, 3, -1); |
| assertOutput(b(0xff, 0xff), out, 3); |
| } |
| |
| @Test |
| public void testEncodeInt24() { |
| byte[] out = new byte[16]; |
| |
| prepareOutput(out); |
| NB.encodeInt24(out, 0, 0); |
| assertOutput(b(0, 0, 0), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt24(out, 3, 0); |
| assertOutput(b(0, 0, 0), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt24(out, 0, 3); |
| assertOutput(b(0, 0, 3), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt24(out, 3, 3); |
| assertOutput(b(0, 0, 3), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt24(out, 0, 0xc0deac); |
| assertOutput(b(0xc0, 0xde, 0xac), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt24(out, 3, 0xbadeac); |
| assertOutput(b(0xba, 0xde, 0xac), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt24(out, 3, -1); |
| assertOutput(b(0xff, 0xff, 0xff), out, 3); |
| } |
| |
| @Test |
| public void testEncodeInt32() { |
| final byte[] out = new byte[16]; |
| |
| prepareOutput(out); |
| NB.encodeInt32(out, 0, 0); |
| assertOutput(b(0, 0, 0, 0), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt32(out, 3, 0); |
| assertOutput(b(0, 0, 0, 0), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt32(out, 0, 3); |
| assertOutput(b(0, 0, 0, 3), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt32(out, 3, 3); |
| assertOutput(b(0, 0, 0, 3), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt32(out, 0, 0xdeac); |
| assertOutput(b(0, 0, 0xde, 0xac), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt32(out, 3, 0xdeac); |
| assertOutput(b(0, 0, 0xde, 0xac), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt32(out, 0, 0xdeac9853); |
| assertOutput(b(0xde, 0xac, 0x98, 0x53), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt32(out, 3, 0xdeac9853); |
| assertOutput(b(0xde, 0xac, 0x98, 0x53), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt32(out, 3, -1); |
| assertOutput(b(0xff, 0xff, 0xff, 0xff), out, 3); |
| } |
| |
| @Test |
| public void testEncodeInt64() { |
| final byte[] out = new byte[16]; |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 0, 0L); |
| assertOutput(b(0, 0, 0, 0, 0, 0, 0, 0), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 3, 0L); |
| assertOutput(b(0, 0, 0, 0, 0, 0, 0, 0), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 0, 3L); |
| assertOutput(b(0, 0, 0, 0, 0, 0, 0, 3), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 3, 3L); |
| assertOutput(b(0, 0, 0, 0, 0, 0, 0, 3), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 0, 0xdeacL); |
| assertOutput(b(0, 0, 0, 0, 0, 0, 0xde, 0xac), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 3, 0xdeacL); |
| assertOutput(b(0, 0, 0, 0, 0, 0, 0xde, 0xac), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 0, 0xdeac9853L); |
| assertOutput(b(0, 0, 0, 0, 0xde, 0xac, 0x98, 0x53), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 3, 0xdeac9853L); |
| assertOutput(b(0, 0, 0, 0, 0xde, 0xac, 0x98, 0x53), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 0, 0xac431242deac9853L); |
| assertOutput(b(0xac, 0x43, 0x12, 0x42, 0xde, 0xac, 0x98, 0x53), out, 0); |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 3, 0xac431242deac9853L); |
| assertOutput(b(0xac, 0x43, 0x12, 0x42, 0xde, 0xac, 0x98, 0x53), out, 3); |
| |
| prepareOutput(out); |
| NB.encodeInt64(out, 3, -1L); |
| assertOutput(b(0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff), out, 3); |
| } |
| |
| private static void prepareOutput(byte[] buf) { |
| for (int i = 0; i < buf.length; i++) |
| buf[i] = (byte) (0x77 + i); |
| } |
| |
| private static void assertOutput(final byte[] expect, final byte[] buf, |
| final int offset) { |
| for (int i = 0; i < offset; i++) |
| assertEquals((byte) (0x77 + i), buf[i]); |
| for (int i = 0; i < expect.length; i++) |
| assertEquals(expect[i], buf[offset + i]); |
| for (int i = offset + expect.length; i < buf.length; i++) |
| assertEquals((byte) (0x77 + i), buf[i]); |
| } |
| |
| private static byte[] b(int a, int b) { |
| return new byte[] { (byte) a, (byte) b }; |
| } |
| |
| private static byte[] padb(int len, int a, int b) { |
| final byte[] r = new byte[len + 2]; |
| for (int i = 0; i < len; i++) |
| r[i] = (byte) 0xaf; |
| r[len] = (byte) a; |
| r[len + 1] = (byte) b; |
| return r; |
| } |
| |
| private static byte[] b(int a, int b, int c) { |
| return new byte[] { (byte) a, (byte) b, (byte) c }; |
| } |
| |
| private static byte[] b(int a, int b, int c, int d) { |
| return new byte[] { (byte) a, (byte) b, (byte) c, (byte) d }; |
| } |
| |
| private static byte[] padb(int len, int a, int b, int c) { |
| final byte[] r = new byte[len + 4]; |
| for (int i = 0; i < len; i++) |
| r[i] = (byte) 0xaf; |
| r[len] = (byte) a; |
| r[len + 1] = (byte) b; |
| r[len + 2] = (byte) c; |
| return r; |
| } |
| |
| private static byte[] padb(final int len, final int a, final int b, |
| final int c, final int d) { |
| final byte[] r = new byte[len + 4]; |
| for (int i = 0; i < len; i++) |
| r[i] = (byte) 0xaf; |
| r[len] = (byte) a; |
| r[len + 1] = (byte) b; |
| r[len + 2] = (byte) c; |
| r[len + 3] = (byte) d; |
| return r; |
| } |
| |
| private static byte[] b(final int a, final int b, final int c, final int d, |
| final int e, final int f, final int g, final int h) { |
| return new byte[] { (byte) a, (byte) b, (byte) c, (byte) d, (byte) e, |
| (byte) f, (byte) g, (byte) h }; |
| } |
| |
| private static byte[] padb(final int len, final int a, final int b, |
| final int c, final int d, final int e, final int f, final int g, |
| final int h) { |
| final byte[] r = new byte[len + 8]; |
| for (int i = 0; i < len; i++) |
| r[i] = (byte) 0xaf; |
| r[len] = (byte) a; |
| r[len + 1] = (byte) b; |
| r[len + 2] = (byte) c; |
| r[len + 3] = (byte) d; |
| r[len + 4] = (byte) e; |
| r[len + 5] = (byte) f; |
| r[len + 6] = (byte) g; |
| r[len + 7] = (byte) h; |
| return r; |
| } |
| } |