public static int getEndian(byte[] buf, int offset) { BaseDexBuffer bdb = new BaseDexBuffer(buf); return bdb.readInt(offset + ENDIAN_TAG_OFFSET); } }
public static int getDependenciesOffset(byte[] buf) { BaseDexBuffer bdb = new BaseDexBuffer(buf); return bdb.readSmallUint(DEPENDENCIES_OFFSET); } }
private void performSizedRightExtendedIntFailureTest(byte[] buf) { BaseDexBuffer dexBuf = new BaseDexBuffer(buf); BaseDexReader reader = dexBuf.readerAt(0); try { reader.readSizedRightExtendedInt(buf.length); Assert.fail(); } catch (ExceptionWithContext ex) { // expected } }
@Test public void testReadRandom() { Random r = new Random(1234567890); ByteBuffer byteBuf = ByteBuffer.allocateDirect(4).order(ByteOrder.LITTLE_ENDIAN); byte[] buf = new byte[4]; BaseDexBuffer dexBuf = new BaseDexBuffer(buf); for (int i=0; i<10000; i++) { int val = r.nextInt(); byteBuf.putInt(0, val); byteBuf.position(0); byteBuf.get(buf); boolean expectException = val < 0; try { int returnedVal = dexBuf.readSmallUint(0); Assert.assertFalse(String.format("Didn't throw an exception for value: %x", val), expectException); Assert.assertEquals(val, returnedVal); } catch (Exception ex) { Assert.assertTrue(String.format("Threw an exception for value: %x", val), expectException); } Assert.assertEquals(val, dexBuf.readInt(0)); Assert.assertEquals(val & 0xFFFF, dexBuf.readUshort(0)); Assert.assertEquals((val >> 8) & 0xFFFF, dexBuf.readUshort(1)); Assert.assertEquals((val >> 16) & 0xFFFF, dexBuf.readUshort(2)); Assert.assertEquals((short)val, dexBuf.readShort(0)); Assert.assertEquals((short)(val >> 8), dexBuf.readShort(1)); Assert.assertEquals((short)(val >> 16), dexBuf.readShort(2)); } }
@Test public void testReadOptionalUintSuccess() { BaseDexBuffer dexBuf = new BaseDexBuffer(new byte[] {0x11, 0x22, 0x33, 0x44}); Assert.assertEquals(0x44332211, dexBuf.readSmallUint(0)); dexBuf = new BaseDexBuffer(new byte[] {0x00, 0x00, 0x00, 0x00}); Assert.assertEquals(0, dexBuf.readSmallUint(0)); dexBuf = new BaseDexBuffer(new byte[] {(byte)0xff, (byte)0xff, (byte)0xff, 0x7f}); Assert.assertEquals(0x7fffffff, dexBuf.readSmallUint(0)); dexBuf = new BaseDexBuffer(new byte[] {(byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff}); Assert.assertEquals(-1, dexBuf.readOptionalUint(0)); }
public int readUshort() { int o = offset; int result = dexBuf.readUshort(offset); offset = o + 2; return result; }
public int readUbyte() { int o = offset; int result = dexBuf.readUbyte(offset); offset = o + 1; return result; }
@Test public void testReadLong() { BaseDexBuffer dexBuf = new BaseDexBuffer(new byte[] {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77}); Assert.assertEquals(0x7766554433221100L, dexBuf.readLong(0)); dexBuf = new BaseDexBuffer(new byte[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}); Assert.assertEquals(0, dexBuf.readLong(0)); dexBuf = new BaseDexBuffer(new byte[] {(byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, 0x7f}); Assert.assertEquals(Long.MAX_VALUE, dexBuf.readLong(0)); dexBuf = new BaseDexBuffer(new byte[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, (byte)0x80}); Assert.assertEquals(Long.MIN_VALUE, dexBuf.readLong(0)); dexBuf = new BaseDexBuffer(new byte[] {(byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0x80}); Assert.assertEquals(0x80ffffffffffffffL, dexBuf.readLong(0)); dexBuf = new BaseDexBuffer(new byte[] {(byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff}); Assert.assertEquals(-1, dexBuf.readLong(0)); }
public int readByte() { int o = offset; int result = dexBuf.readByte(offset); offset = o + 1; return result; }
public int readSmallUint() { int o = offset; int result = dexBuf.readSmallUint(o); offset = o + 4; return result; }
public int readShort() { int o = offset; int result = dexBuf.readShort(offset); offset = o + 2; return result; }
public long readLong() { int o = offset; long result = dexBuf.readLong(offset); offset = o + 8; return result; }
public int readInt() { int o = offset; int result = dexBuf.readInt(offset); offset = o + 4; return result; }
@Test public void testReadUshort() { BaseDexBuffer dexBuf = new BaseDexBuffer(new byte[] {0x11, 0x22}); Assert.assertEquals(dexBuf.readUshort(0), 0x2211); dexBuf = new BaseDexBuffer(new byte[] {0x00, 0x00}); Assert.assertEquals(dexBuf.readUshort(0), 0); dexBuf = new BaseDexBuffer(new byte[] {(byte)0xff, (byte)0xff}); Assert.assertEquals(dexBuf.readUshort(0), 0xffff); dexBuf = new BaseDexBuffer(new byte[] {(byte)0x00, (byte)0x80}); Assert.assertEquals(dexBuf.readUshort(0), 0x8000); dexBuf = new BaseDexBuffer(new byte[] {(byte)0xff, (byte)0x7f}); Assert.assertEquals(dexBuf.readUshort(0), 0x7fff); }
@Test public void testReadShort() { BaseDexBuffer dexBuf = new BaseDexBuffer(new byte[] {0x11, 0x22}); Assert.assertEquals(dexBuf.readShort(0), 0x2211); dexBuf = new BaseDexBuffer(new byte[] {0x00, 0x00}); Assert.assertEquals(dexBuf.readShort(0), 0); dexBuf = new BaseDexBuffer(new byte[] {(byte)0xff, (byte)0xff}); Assert.assertEquals(dexBuf.readShort(0), -1); dexBuf = new BaseDexBuffer(new byte[] {(byte)0x00, (byte)0x80}); Assert.assertEquals(dexBuf.readShort(0), Short.MIN_VALUE); dexBuf = new BaseDexBuffer(new byte[] {(byte)0xff, (byte)0x7f}); Assert.assertEquals(dexBuf.readShort(0), 0x7fff); dexBuf = new BaseDexBuffer(new byte[] {(byte)0xff, (byte)0x80}); Assert.assertEquals(dexBuf.readShort(0), 0xffff80ff); }
@Test public void testReadUbyte() { byte[] buf = new byte[1]; BaseDexBuffer dexBuf = new BaseDexBuffer(buf); for (int i=0; i<=0xff; i++) { buf[0] = (byte)i; Assert.assertEquals(i, dexBuf.readUbyte(0)); } }
@Test public void testReadByte() { byte[] buf = new byte[1]; BaseDexBuffer dexBuf = new BaseDexBuffer(buf); for (int i=0; i<=0xff; i++) { buf[0] = (byte)i; Assert.assertEquals((byte)i, dexBuf.readByte(0)); } }
public int readOptionalUint() { int o = offset; int result = dexBuf.readOptionalUint(o); offset = o + 4; return result; }
public DexReader(BaseDexBuffer dex) { this.reader = dex.readerAt(0); }
public static int getDependenciesOffset(byte[] buf) { BaseDexBuffer bdb = new BaseDexBuffer(buf); return bdb.readSmallUint(DEPENDENCIES_OFFSET); } }