/* Copyright (c) 2007-2009 Timothy Wall, All Rights Reserved
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* <p/>
* This library 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
* Lesser General Public License for more details.
*/
package com.sun.jna;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.DoubleBuffer;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import junit.framework.TestCase;
import com.sun.jna.ptr.ByteByReference;
import com.sun.jna.ptr.IntByReference;
import com.sun.jna.ptr.LongByReference;
/** TODO: need more alignment tests, especially platform-specific behavior
* @author twall@users.sf.net
*/
public class StructureTest extends TestCase {
public static void main(java.lang.String[] argList) {
junit.textui.TestRunner.run(StructureTest.class);
}
public void testSimpleSize() throws Exception {
class TestStructure extends Structure {
public int field;
}
Structure s = new TestStructure();
assertEquals("Wrong size", 4, s.size());
}
// must be public to populate array
public static class TestAllocStructure extends Structure {
public int f0;
public int f1;
public int f2;
public int f3;
}
public void testFieldsAllocated() {
class TestStructure extends Structure {
public TestStructure() { }
public TestStructure(Pointer p) { super(p); }
public int field;
public int fieldCount() { return fields().size(); }
}
TestStructure s = new TestStructure();
assertEquals("Wrong number of fields (default)", 1, s.fieldCount());
s = new TestStructure(new Memory(4));
assertEquals("Wrong number of fields (preallocated)", 1, s.fieldCount());
}
public void testProvidedMemoryTooSmall() {
class TestStructure extends Structure {
public TestStructure() { }
public TestStructure(Pointer p) { super(p); }
public int field;
public int fieldCount() { return fields().size(); }
}
try {
TestStructure s = new TestStructure(new Memory(2));
fail("Expect exception if provided memory is insufficient");
}
catch(IllegalArgumentException e) {
}
}
public void testClearOnAllocate() {
TestAllocStructure s = new TestAllocStructure();
s.read();
assertEquals("Memory not cleared on structure init", 0, s.f0);
assertEquals("Memory not cleared on structure init", 0, s.f1);
assertEquals("Memory not cleared on structure init", 0, s.f2);
assertEquals("Memory not cleared on structure init", 0, s.f3);
s = (TestAllocStructure)s.toArray(2)[1];
assertEquals("Memory not cleared on array init", 0, s.f0);
assertEquals("Memory not cleared on array init", 0, s.f1);
assertEquals("Memory not cleared on array init", 0, s.f2);
assertEquals("Memory not cleared on array init", 0, s.f3);
}
// cross-platform smoke test
public void testGNUCAlignment() {
class TestStructure extends Structure {
public byte b;
public short s;
public int i;
public long l;
public float f;
public double d;
}
TestStructure s = new TestStructure();
s.setAlignType(Structure.ALIGN_GNUC);
boolean isSPARC = "sparc".equals(System.getProperty("os.arch"));
final int SIZE = NativeLong.SIZE == 4 && !isSPARC ? 28 : 32;
assertEquals("Wrong structure size", SIZE, s.size());
}
// cross-platform smoke test
public void testMSVCAlignment() {
class TestStructure extends Structure {
public byte b;
public short s;
public int i;
public long l;
public float f;
public double d;
}
TestStructure s = new TestStructure();
s.setAlignType(Structure.ALIGN_MSVC);
assertEquals("Wrong structure size", 32, s.size());
}
public static class FilledStructure extends Structure {
public FilledStructure() {
for (int i=0;i < size();i++) {
getPointer().setByte(i, (byte)0xFF);
}
}
}
// Do NOT change the order of naming w/o changing testlib.c as well
public static class TestStructure0 extends FilledStructure {
public byte field0 = 0x01;
public short field1 = 0x0202;
}
public static class TestStructure1 extends FilledStructure {
public byte field0 = 0x01;
public int field1 = 0x02020202;
}
public static class TestStructure2 extends FilledStructure {
public short field0 = 0x0101;
public int field1 = 0x02020202;
}
public static class TestStructure3 extends FilledStructure {
public int field0 = 0x01010101;
public short field1 = 0x0202;
public int field2 = 0x03030303;
}
public static class TestStructure4 extends FilledStructure {
public int field0 = 0x01010101;
public long field1 = 0x0202020202020202L;
public int field2 = 0x03030303;
public long field3 = 0x0404040404040404L;
}
public static class TestStructure5 extends FilledStructure {
public long field0 = 0x0101010101010101L;
public byte field1 = 0x02;
}
public interface SizeTest extends Library {
int getStructureSize(int type);
}
private void testStructureSize(int index) {
try {
SizeTest lib = (SizeTest)Native.loadLibrary("testlib", SizeTest.class);
Class cls = Class.forName(getClass().getName() + "$TestStructure" + index);
Structure s = Structure.newInstance(cls);
assertEquals("Incorrect size: " + s, lib.getStructureSize(index), s.size());
}
catch(Exception e) {
throw new Error(e);
}
}
public void testStructureSize0() {
testStructureSize(0);
}
public void testStructureSize1() {
testStructureSize(1);
}
public void testStructureSize2() {
testStructureSize(2);
}
public void testStructureSize3() {
testStructureSize(3);
}
public void testStructureSize4() {
testStructureSize(4);
}
public void testStructureSize5() {
testStructureSize(5);
}
public interface AlignmentTest extends Library {
int testStructureAlignment(Structure s, int type,
IntByReference offsetp, LongByReference valuep);
}
private void testAlignStruct(int index) {
AlignmentTest lib = (AlignmentTest)Native.loadLibrary("testlib", AlignmentTest.class);
try {
IntByReference offset = new IntByReference();
LongByReference value = new LongByReference();
Class cls = Class.forName(getClass().getName() + "$TestStructure" + index);
Structure s = (Structure)cls.newInstance();
int result = lib.testStructureAlignment(s, index, offset, value);
assertEquals("Wrong native value at field " + result
+ "=0x" + Long.toHexString(value.getValue())
+ " (actual native field offset=" + offset.getValue()
+ ") in " + s, -2, result);
}
catch(Exception e) {
throw new Error(e);
}
}
public void testAlignStruct0() {
testAlignStruct(0);
}
public void testAlignStruct1() {
testAlignStruct(1);
}
public void testAlignStruct2() {
testAlignStruct(2);
}
public void testAlignStruct3() {
testAlignStruct(3);
}
public void testAlignStruct4() {
testAlignStruct(4);
}
public void testAlignStruct5() {
testAlignStruct(5);
}
// must be publicly accessible in order to create array elements
public static class PublicTestStructure extends Structure {
public static class ByReference extends PublicTestStructure implements Structure.ByReference { }
public int x, y;
}
public void testStructureField() {
class TestStructure extends Structure {
public PublicTestStructure s1, s2;
public int after;
}
TestStructure s = new TestStructure();
assertNotNull("Inner structure should be initialized", s.s1);
assertEquals("Wrong aggregate size",
s.s1.size() + s.s2.size() + 4, s.size());
s.write();
assertEquals("Wrong memory for structure field 1 after write",
s.getPointer(), s.s1.getPointer());
assertEquals("Wrong memory for structure field 2 after write",
s.getPointer().share(s.s1.size()),
s.s2.getPointer());
s.read();
assertEquals("Wrong memory for structure field 1 after read",
s.getPointer(), s.s1.getPointer());
assertEquals("Wrong memory for structure field 2 after read",
s.getPointer().share(s.s1.size()),
s.s2.getPointer());
}
public void testPrimitiveArrayField() {
class TestStructure extends Structure {
public byte[] buffer = new byte[1024];
}
TestStructure s = new TestStructure();
assertEquals("Wrong size for structure with nested array", 1024, s.size());
assertNotNull("Array should be initialized", s.buffer);
s.write();
s.read();
}
public void testStructureArrayField() {
class TestStructure extends Structure {
public PublicTestStructure[] inner = new PublicTestStructure[2];
public PublicTestStructure[] inner2 = (PublicTestStructure[])
new PublicTestStructure().toArray(2);
}
TestStructure s = new TestStructure();
int innerSize = new PublicTestStructure().size();
assertEquals("Wrong size for structure with nested array of struct",
s.inner.length * innerSize + s.inner2.length * innerSize,
s.size());
s.write();
assertNotNull("Inner array elements should auto-initialize", s.inner[0]);
s.inner[0].x = s.inner[0].y = -1;
s.inner[1].x = s.inner[1].y = -1;
s.read();
assertEquals("Inner structure array element 0 not properly read",
0, s.inner[0].x);
assertEquals("Inner structure array element 1 not properly read",
0, s.inner[1].x);
assertEquals("Wrong memory for uninitialized nested array",
s.getPointer(), s.inner[0].getPointer());
assertEquals("Wrong memory for initialized nested array",
s.getPointer().share(innerSize * s.inner.length),
s.inner2[0].getPointer());
}
public static class ToArrayTestStructure extends Structure {
public PublicTestStructure[] inner =
(PublicTestStructure[])new PublicTestStructure().toArray(2);
}
public void testToArrayWithStructureArrayField() {
ToArrayTestStructure[] array =
(ToArrayTestStructure[])new ToArrayTestStructure().toArray(2);
assertEquals("Wrong address for top-level array element",
array[0].getPointer().share(array[0].size()),
array[1].getPointer());
assertEquals("Wrong address for nested array element",
array[1].inner[0].getPointer().share(array[1].inner[0].size()),
array[1].inner[1].getPointer());
}
public void testUninitializedNestedArrayFails() {
class TestStructure extends Structure {
public Pointer[] buffer;
}
TestStructure s = new TestStructure();
try {
s.size();
fail("Size can't be calculated unless array fields are initialized");
}
catch(IllegalStateException e) {
}
}
public void testReadWriteStructure() {
class TestStructure extends Structure {
public TestStructure() {
// Have to do this due to inline primitive arrays
allocateMemory();
}
public boolean z; // native int
public byte b; // native char
public char c; // native wchar_t
public short s; // native short
public int i; // native int
public long l; // native long long
public float f; // native float
public double d; // native double
public byte[] ba = new byte[3];
public char[] ca = new char[3];
public short[] sa = new short[3];
public int[] ia = new int[3];
public long[] la = new long[3];
public float[] fa = new float[3];
public double[] da = new double[3];
public PublicTestStructure nested;
}
TestStructure s = new TestStructure();
// set content of the structure
s.z = true;
s.b = 1;
s.c = 2;
s.s = 3;
s.i = 4;
s.l = 5;
s.f = 6.0f;
s.d = 7.0;
s.nested.x = 1;
s.nested.y = 2;
for (int i = 0; i < 3; i++) {
s.ba[i] = (byte) (8 + i);
s.ca[i] = (char) (11 + i);
s.sa[i] = (short) (14 + i);
s.ia[i] = 17 + i;
s.la[i] = 23 + i;
s.fa[i] = (float) 26 + i;
s.da[i] = (double) 29 + i;
}
// write content to memory
s.write();
Pointer p = s.getPointer();
s = new TestStructure();
s.useMemory(p);
// read content from memory and compare field values
s.read();
assertEquals("Wrong boolean field value after write/read", s.z, true);
assertEquals("Wrong byte field value after write/read", s.b, 1);
assertEquals("Wrong char field value after write/read", s.c, 2);
assertEquals("Wrong short field value after write/read", s.s, 3);
assertEquals("Wrong int field value after write/read", s.i, 4);
assertEquals("Wrong long field value after write/read", s.l, 5);
assertEquals("Wrong float field value after write/read", s.f, 6.0f);
assertEquals("Wrong double field value after write/read", s.d, 7.0);
assertEquals("Wrong nested struct field value after write/read (x)", s.nested.x, 1);
assertEquals("Wrong nested struct field value after write/read (y)", s.nested.y, 2);
for (int i = 0; i < 3; i++) {
assertEquals("Wrong byte array field value after write/read", s.ba[i], (byte) (8 + i));
assertEquals("Wrong char array field value after write/read", s.ca[i], (char) (11 + i));
assertEquals("Wrong short array field value after write/read", s.sa[i], (short) (14 + i));
assertEquals("Wrong int array field value after write/read", s.ia[i], 17 + i);
assertEquals("Wrong long array field value after write/read", s.la[i], 23 + i);
assertEquals("Wrong float array field value after write/read", s.fa[i], (float) 26 + i);
assertEquals("Wrong double array field value after write/read", s.da[i], (double) 29 + i);
}
// test constancy of references after read
int[] ia = s.ia;
s.read();
assertTrue("Array field reference should be unchanged", ia == s.ia);
}
public void testNativeLongSize() throws Exception {
class TestStructure extends Structure {
public NativeLong l;
}
Structure s = new TestStructure();
assertEquals("Wrong size", NativeLong.SIZE, s.size());
}
public void testNativeLongRead() throws Exception {
class TestStructure extends Structure {
public int i;
public NativeLong l;
}
TestStructure s = new TestStructure();
if (NativeLong.SIZE == 8) {
final long MAGIC = 0x1234567887654321L;
s.getPointer().setLong(8, MAGIC);
s.read();
assertEquals("NativeLong field mismatch", MAGIC, s.l.longValue());
}
else {
final int MAGIC = 0xABEDCF23;
s.getPointer().setInt(4, MAGIC);
s.read();
assertEquals("NativeLong field mismatch", MAGIC, s.l.intValue());
}
}
public void testNativeLongWrite() throws Exception {
class TestStructure extends Structure {
public int i;
public NativeLong l;
}
TestStructure s = new TestStructure();
if (NativeLong.SIZE == 8) {
final long MAGIC = 0x1234567887654321L;
s.l = new NativeLong(MAGIC);
s.write();
long l = s.getPointer().getLong(8);
assertEquals("NativeLong field mismatch", MAGIC, l);
}
else {
final int MAGIC = 0xABEDCF23;
s.l = new NativeLong(MAGIC);
s.write();
int i = s.getPointer().getInt(4);
assertEquals("NativeLong field mismatch", MAGIC, i);
}
}
public void testDisallowFunctionPointerAsField() {
class BadFieldStructure extends Structure {
public Function cb;
}
try {
new BadFieldStructure().size();
fail("Function fields should not be allowed");
}
catch(IllegalArgumentException e) {
}
}
public static class BadFieldStructure extends Structure {
public Object badField;
}
public void testUnsupportedField() {
class BadNestedStructure extends Structure {
public BadFieldStructure badStruct = new BadFieldStructure();
}
try {
new BadFieldStructure().size();
fail("Should throw IllegalArgumentException on bad field");
}
catch(IllegalArgumentException e) {
assertTrue("Exception should include field name",
e.getMessage().indexOf("badField") != -1);
}
try {
new BadNestedStructure().size();
fail("Should throw IllegalArgumentException on bad field");
}
catch(IllegalArgumentException e) {
assertTrue("Exception should include enclosing type: " + e,
e.getMessage().indexOf(BadNestedStructure.class.getName()) != -1);
assertTrue("Exception should include nested field name: " + e,
e.getMessage().indexOf("badStruct") != -1);
assertTrue("Exception should include field name: " + e,
e.getMessage().indexOf("badField") != -1);
}
}
public void testToArray() {
PublicTestStructure s = new PublicTestStructure();
PublicTestStructure[] array = (PublicTestStructure[])s.toArray(1);
assertEquals("Array should consist of a single element",
1, array.length);
assertEquals("First element should be original", s, array[0]);
assertEquals("Structure memory should be expanded", 2, s.toArray(2).length);
}
public void testByReferenceArraySync() {
PublicTestStructure.ByReference s = new PublicTestStructure.ByReference();
PublicTestStructure.ByReference[] array =
(PublicTestStructure.ByReference[])s.toArray(2);
class TestStructure extends Structure {
public PublicTestStructure.ByReference ref;
}
TestStructure ts = new TestStructure();
ts.ref = s;
final int VALUE = 42;
array[0].x = VALUE;
array[1].x = VALUE;
ts.write();
assertEquals("Array element not written: " + array[0],
VALUE, array[0].getPointer().getInt(0));
assertEquals("Array element not written: " + array[1],
VALUE, array[1].getPointer().getInt(0));
array[0].getPointer().setInt(4, VALUE);
array[1].getPointer().setInt(4, VALUE);
ts.read();
assertEquals("Array element not read: " + array[0], VALUE, array[0].y);
assertEquals("Array element not read: " + array[1], VALUE, array[1].y);
}
static class CbStruct extends Structure {
public Callback cb;
}
public void testCallbackWrite() {
final CbStruct s = new CbStruct();
s.cb = new Callback() {
public void callback() {
}
};
s.write();
Pointer func = s.getPointer().getPointer(0);
assertNotNull("Callback trampoline not set", func);
Map refs = CallbackReference.callbackMap;
assertTrue("Callback not cached", refs.containsKey(s.cb));
CallbackReference ref = (CallbackReference)refs.get(s.cb);
assertEquals("Wrong trampoline", ref.getTrampoline(), func);
}
public void testUninitializedArrayField() {
class UninitializedArrayFieldStructure extends Structure {
public byte[] array;
}
try {
Structure s = new UninitializedArrayFieldStructure();
assertTrue("Invalid size: " + s.size(), s.size() > 0);
fail("Uninitialized array field should cause write failure");
}
catch(IllegalStateException e) {
}
}
public static class ArrayOfStructure extends Structure {
public Structure[] array;
}
public void testPlainStructureArrayField() {
try {
new ArrayOfStructure();
fail("Structure[] not allowed as a field of Structure");
}
catch(IllegalArgumentException e) {
}
catch(Exception e) {
fail("Wrong exception thrown on Structure[] field in Structure: " + e);
}
}
public void testPointerArrayField() {
class ArrayOfPointerStructure extends Structure {
final static int SIZE = 10;
public Pointer[] array = new Pointer[SIZE];
}
ArrayOfPointerStructure s = new ArrayOfPointerStructure();
int size = s.size();
assertEquals("Wrong size", ArrayOfPointerStructure.SIZE * Pointer.SIZE, size);
s.array[0] = s.getPointer();
s.write();
s.array[0] = null;
s.read();
assertEquals("Wrong first element", s.getPointer(), s.array[0]);
}
class BufferStructure extends Structure {
public Buffer buffer;
public DoubleBuffer dbuffer;
}
public void testBufferFieldWriteNULL() {
BufferStructure bs = new BufferStructure();
bs.write();
}
public void testBufferFieldWriteNonNULL() {
BufferStructure bs = new BufferStructure();
bs.buffer = ByteBuffer.allocateDirect(16);
bs.dbuffer = ((ByteBuffer)bs.buffer).asDoubleBuffer();
bs.write();
}
public void testBufferFieldReadUnchanged() {
BufferStructure bs = new BufferStructure();
Buffer b = ByteBuffer.allocateDirect(16);
bs.buffer = b;
bs.dbuffer = ((ByteBuffer)bs.buffer).asDoubleBuffer();
bs.write();
bs.read();
assertEquals("Buffer field should be unchanged", b, bs.buffer);
}
public void testBufferFieldReadChanged() {
BufferStructure bs = new BufferStructure();
if (Pointer.SIZE == 4) {
bs.getPointer().setInt(0, 0x1);
}
else {
bs.getPointer().setLong(0, 0x1);
}
try {
bs.read();
fail("Structure read should fail if Buffer pointer was set");
}
catch(IllegalStateException e) {
}
bs.buffer = ByteBuffer.allocateDirect(16);
try {
bs.read();
fail("Structure read should fail if Buffer pointer has changed");
}
catch(IllegalStateException e) {
}
}
public void testBufferFieldReadChangedToNULL() {
BufferStructure bs = new BufferStructure();
bs.buffer = ByteBuffer.allocateDirect(16);
bs.dbuffer = ((ByteBuffer)bs.buffer).asDoubleBuffer();
bs.read();
assertNull("Structure Buffer field should be set null", bs.buffer);
assertNull("Structure DoubleBuffer field should be set null", bs.dbuffer);
}
public void testVolatileStructureField() {
class VolatileStructure extends Structure {
public volatile int counter;
public int value;
}
VolatileStructure s = new VolatileStructure();
s.counter = 1;
s.value = 1;
s.write();
assertEquals("Volatile field should not be written", 0, s.getPointer().getInt(0));
assertEquals("Non-volatile field should be written", 1, s.getPointer().getInt(4));
s.writeField("counter");
assertEquals("Explicit volatile field write failed", 1, s.getPointer().getInt(0));
}
public static class StructureWithPointers extends Structure {
public PublicTestStructure.ByReference s1;
public PublicTestStructure.ByReference s2;
}
public void testStructureByReferenceField() {
StructureWithPointers s = new StructureWithPointers();
assertEquals("Wrong size for structure with structure references",
Pointer.SIZE * 2, s.size());
assertNull("Initial refs should be null", s.s1);
}
public void testRegenerateStructureByReferenceField() {
StructureWithPointers s = new StructureWithPointers();
PublicTestStructure.ByReference inner =
new PublicTestStructure.ByReference();
s.s1 = inner;
s.write();
s.s1 = null;
s.read();
assertEquals("Inner structure not regenerated on read", inner, s.s1);
}
public void testPreserveStructureByReferenceWithUnchangedPointerOnRead() {
StructureWithPointers s = new StructureWithPointers();
PublicTestStructure.ByReference inner =
new PublicTestStructure.ByReference();
s.s1 = inner;
s.write();
s.read();
assertSame("Read should preserve structure object", inner, s.s1);
assertTrue("Read should preserve structure memory",
inner.getPointer() instanceof Memory);
}
public static class TestPointer extends PointerType { }
public void testPreservePointerFields() {
class TestStructure extends Structure {
public Pointer p = new Memory(256);
public TestPointer p2 = new TestPointer() {
{ setPointer(new Memory(256)); }
};
}
TestStructure s = new TestStructure();
final Pointer p = s.p;
s.write();
s.read();
assertSame("Should preserve Pointer references if peer unchanged", p, s.p);
}
public void testOverwriteStructureByReferenceFieldOnRead() {
StructureWithPointers s = new StructureWithPointers();
PublicTestStructure.ByReference inner =
new PublicTestStructure.ByReference();
PublicTestStructure.ByReference inner2 =
new PublicTestStructure.ByReference();
s.s1 = inner2;
s.write();
s.s1 = inner;
s.read();
assertNotSame("Read should overwrite structure reference", inner, s.s1);
}
public void testAutoWriteStructureByReferenceField() {
StructureWithPointers s = new StructureWithPointers();
s.s1 = new StructureTest.PublicTestStructure.ByReference();
s.s1.x = -1;
s.write();
assertEquals("Structure.ByReference field not written automatically",
-1, s.s1.getPointer().getInt(0));
}
public void testStructureByReferenceArrayField() {
class TestStructure extends Structure {
public PublicTestStructure.ByReference[] array = new PublicTestStructure.ByReference[2];
}
TestStructure s = new TestStructure();
assertEquals("Wrong structure size", 2*Pointer.SIZE, s.size());
PublicTestStructure.ByReference ref = new PublicTestStructure.ByReference();
ref.x = 42;
Object aref = s.array;
s.array[0] = ref;
s.array[1] = new PublicTestStructure.ByReference();
s.write();
s.read();
assertSame("Array reference should not change", aref, s.array);
assertSame("Elements should not be overwritten when unchanged",
ref, s.array[0]);
s.array[0] = null;
s.read();
assertNotSame("Null should be overwritten with a new ref", ref, s.array[0]);
assertNotNull("New ref should not be null", s.array[0]);
assertEquals("New ref should be equivalent", ref, s.array[0]);
}
public void testAutoReadWriteStructureByReferenceArrayField() {
class TestStructure extends Structure {
public PublicTestStructure.ByReference field;
}
TestStructure s = new TestStructure();
s.field = new PublicTestStructure.ByReference();
PublicTestStructure.ByReference[] array =
(PublicTestStructure.ByReference[])s.field.toArray(2);
final int VALUE = -1;
array[1].x = VALUE;
s.write();
assertEquals("ByReference array member not auto-written",
VALUE, array[1].getPointer().getInt(0));
array[1].getPointer().setInt(0, VALUE*2);
s.read();
assertEquals("ByReference array member not auto-read",
VALUE*2, array[1].x);
}
static class NestedTypeInfoStructure extends Structure {
public static class Inner extends Structure {
public int dummy;
}
public Inner inner;
public int dummy;
}
public static class size_t extends IntegerType {
public size_t() { this(0); }
public size_t(long value) { super(Native.POINTER_SIZE, value); }
}
public void testNestedStructureTypeInfo() {
class FFIType extends Structure {
public FFIType(Pointer p) {
useMemory(p); read();
}
public size_t size;
public short alignment;
public short type;
public Pointer elements;
}
NestedTypeInfoStructure s = new NestedTypeInfoStructure();
Pointer p = s.getTypeInfo();
FFIType ffi_type = new FFIType(p);
assertNotNull("Type info should not be null", p);
Pointer els = ffi_type.elements;
Pointer inner = s.inner.getTypeInfo();
assertEquals("Wrong type information for 'inner' field",
inner, els.getPointer(0));
assertEquals("Wrong type information for integer field",
Structure.getTypeInfo(new Integer(0)),
els.getPointer(Pointer.SIZE));
assertNull("Type element list should be null-terminated",
els.getPointer(Pointer.SIZE*2));
}
public void testInnerArrayTypeInfo() {
class TestStructure extends Structure {
public int[] inner = new int[5];
}
TestStructure s = new TestStructure();
assertEquals("Wrong structure size", 20, s.size());
Pointer p = s.getTypeInfo();
assertNotNull("Type info should not be null", p);
}
public void testTypeInfoForNull() {
assertEquals("Wrong type information for 'null'",
Structure.getTypeInfo(new Pointer(0)),
Structure.getTypeInfo(null));
}
public void testToString() {
class TestStructure extends Structure {
public int intField;
public PublicTestStructure inner;
}
TestStructure s = new TestStructure();
final String LS = System.getProperty("line.separator");
System.setProperty("jna.dump_memory", "true");
final String EXPECTED = "(?m).*" + s.size() + " bytes.*\\{" + LS
+ " int intField@0=0" + LS
+ " .* inner@4=.*\\{" + LS
+ " int x@0=0" + LS
+ " int y@4=0" + LS
+ " \\}" + LS
+ "\\}" + LS
+ "memory dump" + LS
+ "\\[00000000\\]" + LS
+ "\\[00000000\\]" + LS
+ "\\[00000000\\]";
String actual = s.toString();
assertTrue("Improperly formatted toString(): expected "
+ EXPECTED + "\n" + actual,
actual.matches(EXPECTED));
}
public void testNativeMappedWrite() {
class TestStructure extends Structure {
public ByteByReference ref;
}
TestStructure s = new TestStructure();
ByteByReference ref = s.ref = new ByteByReference();
s.write();
assertEquals("Value not properly written", ref.getPointer(), s.getPointer().getPointer(0));
s.ref = null;
s.write();
assertNull("Non-null value was written: " + s.getPointer().getPointer(0), s.getPointer().getPointer(0));
}
public void testNativeMappedRead() {
class TestStructure extends Structure {
public ByteByReference ref;
}
TestStructure s = new TestStructure();
s.read();
assertNull("Should read null for initial field value", s.ref);
ByteByReference ref = new ByteByReference();
s.getPointer().setPointer(0, ref.getPointer());
s.read();
assertEquals("Field incorrectly read", ref, s.ref);
s.getPointer().setPointer(0, null);
s.read();
assertNull("Null field incorrectly read", s.ref);
}
public static class ROStructure extends Structure {
public final int field;
{
// Initialize in ctor to avoid compiler replacing
// field references with a constant everywhere
field = 0;
}
}
private ROStructure avoidConstantFieldOptimization(ROStructure s) {
return s;
}
public void testReadOnlyField() {
ROStructure s = new ROStructure();
s.getPointer().setInt(0, 42);
s.read();
s = avoidConstantFieldOptimization(s);
assertEquals("Field value should be set from native", 42, s.field);
s.getPointer().setInt(0, 0);
s.read();
s = avoidConstantFieldOptimization(s);
assertEquals("Field value not synched after native change", 0, s.field);
s.getPointer().setInt(0, 42);
// current Java field value of zero should not be written to native mem
s.write();
assertEquals("Field should not be written", 42, s.getPointer().getInt(0));
s.read();
s = avoidConstantFieldOptimization(s);
assertEquals("Field value not synched after native change (2)", 42, s.field);
}
public void testNativeMappedArrayField() {
final int SIZE = 24;
class TestStructure extends Structure {
public NativeLong[] longs = new NativeLong[SIZE];
}
TestStructure s = new TestStructure();
assertEquals("Wrong structure size", Native.LONG_SIZE * SIZE, s.size());
NativeLong[] aref = s.longs;
for (int i=0;i < s.longs.length;i++) {
s.longs[i] = new NativeLong(i);
}
s.write();
for (int i=0;i < s.longs.length;i++) {
assertEquals("Value not written to memory at index " + i,
i, s.getPointer().getNativeLong(i * NativeLong.SIZE).intValue());
}
s.read();
assertEquals("Array reference should remain unchanged on read",
aref, s.longs);
for (int i=0;i < s.longs.length;i++) {
assertEquals("Wrong value after read at index " + i,
i, s.longs[i].intValue());
}
}
public void testInitializeNativeMappedField() {
final long VALUE = 20;
final NativeLong INITIAL = new NativeLong(VALUE);
class TestStructure extends Structure {
// field overwritten, wrong value before write
// NL bug, wrong value written
{ setAlignType(ALIGN_NONE); }
public NativeLong nl = INITIAL;
public NativeLong uninitialized;
}
TestStructure ts = new TestStructure();
assertEquals("Wrong value in field", VALUE, ts.nl.longValue());
assertSame("Initial value overwritten", INITIAL, ts.nl);
assertEquals("Wrong field value before write", VALUE, ts.nl.longValue());
assertNotNull("Uninitialized field should be initialized", ts.uninitialized);
assertEquals("Wrong initialized value", 0, ts.uninitialized.longValue());
ts.write();
assertEquals("Wrong field value written", VALUE, ts.getPointer().getNativeLong(0).longValue());
assertEquals("Wrong field value written (2)", 0, ts.getPointer().getNativeLong(NativeLong.SIZE).longValue());
ts.read();
assertEquals("Wrong field value", VALUE, ts.nl.longValue());
assertEquals("Wrong field value (2)", 0, ts.uninitialized.longValue());
}
public void testInheritedStructureFieldOrder() {
class TestStructure extends Structure {
public int first = 1;
}
class TestStructureSub extends TestStructure {
public int second = 2;
}
TestStructureSub s = new TestStructureSub();
assertEquals("Wrong size", 8, s.size());
s.write();
assertEquals("Wrong first field: " + s,
s.first, s.getPointer().getInt(0));
assertEquals("Wrong second field: " + s,
s.second, s.getPointer().getInt(4));
}
public void testExplicitStructureFieldOrder() {
final String[] ORDER = new String[] { "one", "two", "three" };
final String[] ORDER2 = new String[] { "one", "two", "three", "four" };
class TestStructure extends Structure {
public int one = 1;
public int three = 3;
public int two = 2;
{
setFieldOrder(ORDER);
}
public List getFieldOrder() {
return super.getFieldOrder();
}
}
class DerivedTestStructure extends TestStructure {
public int four = 4;
{
setFieldOrder(new String[] { "four" });
}
}
TestStructure s = new TestStructure();
assertEquals("Wrong field order",
Arrays.asList(ORDER), s.getFieldOrder());
s.write();
assertEquals("Wrong first field: " + s,
s.one, s.getPointer().getInt(0));
assertEquals("Wrong second field: " + s,
s.two, s.getPointer().getInt(4));
assertEquals("Wrong third field: " + s,
s.three, s.getPointer().getInt(8));
DerivedTestStructure s2 = new DerivedTestStructure();
assertEquals("Wrong field order",
Arrays.asList(ORDER2), s2.getFieldOrder());
s2.write();
assertEquals("Wrong first field: " + s2,
s2.one, s2.getPointer().getInt(0));
assertEquals("Wrong second field: " + s2,
s2.two, s2.getPointer().getInt(4));
assertEquals("Wrong third field: " + s2,
s2.three, s2.getPointer().getInt(8));
assertEquals("Wrong derived field: " + s2,
s2.four, s2.getPointer().getInt(12));
}
public void testCustomTypeMapper() {
class TestField { }
class TestStructure extends Structure {
public TestField field;
public TestStructure() {
DefaultTypeMapper m = new DefaultTypeMapper();
m.addTypeConverter(TestField.class, new TypeConverter() {
public Object fromNative(Object value, FromNativeContext context) {
return new TestField();
}
public Class nativeType() {
return String.class;
}
public Object toNative(Object value, ToNativeContext ctx) {
return value == null ? null : value.toString();
}
});
setTypeMapper(new DefaultTypeMapper());
}
}
new TestStructure();
}
public void testWriteWithNullBoxedPrimitives() {
class TestStructure extends Structure {
public Boolean zfield;
public Integer field;
}
TestStructure s = new TestStructure();
s.write();
s.read();
assertNotNull("Field should not be null after read", s.field);
}
public void testStructureEquals() {
class OtherStructure extends Structure {
public int first;
public int[] second = new int[4];
public Pointer[] third = new Pointer[4];
}
class TestStructure extends Structure {
public int first;
public int[] second = new int[4];
public Pointer[] third = new Pointer[4];
}
OtherStructure s0 = new OtherStructure();
TestStructure s1 = new TestStructure();
TestStructure s2 = new TestStructure();
TestStructure s3 = new TestStructure();
int VALUE = 99;
s1.first = s2.first = s3.first = VALUE;
assertFalse("Structures of different classes with same fields are not equal", s1.equals(s0));
assertFalse("Structures of different classes with same fields are not equal (reflexive)", s0.equals(s1));
assertFalse("Compare to null failed", s1.equals(null));
assertTrue("Equals is not reflexive", s1.equals(s1));
assertTrue("Equals failed on identical structures", s1.equals(s2));
assertTrue("Equals is not symmetric", s2.equals(s1));
assertTrue("Equals is not transitive", s1.equals(s2) && s2.equals(s3) && s1.equals(s3));
}
public void testStructureEqualsByValueByReference() {
class TestStructure extends Structure {
public int first;
public int[] second = new int[4];
public Pointer[] third = new Pointer[4];
}
class ByReference extends TestStructure implements Structure.ByReference { }
class ByValue extends TestStructure implements Structure.ByValue { }
TestStructure s1 = new TestStructure();
TestStructure s2 = new ByReference();
TestStructure s3 = new ByValue();
int VALUE = 99;
s1.first = s2.first = s3.first = VALUE;
assertTrue("Equals failed on identical ByReference", s1.equals(s2));
assertTrue("Equals is not symmetric (ByReference)", s2.equals(s1));
assertTrue("Equals failed on identical ByValue", s1.equals(s3));
assertTrue("Equals is not symmetric (ByValue)", s3.equals(s1));
assertTrue("Equals is not transitive (ByReference/ByValue)", s1.equals(s2) && s2.equals(s3) && s1.equals(s3));
}
public void testStructureHashCodeMatchesEqualsTrue() {
class TestStructure extends Structure {
public int first;
}
TestStructure s1 = new TestStructure();
TestStructure s2 = new TestStructure();
s1.first = s2.first = 0x12345678;
assertEquals("hashCode should match when structures equal",
s1.hashCode(), s2.hashCode());
}
public void testStructureEqualsIgnoresPadding() {
class TestStructure extends Structure {
public byte first;
public int second;
}
TestStructure s1 = new TestStructure();
TestStructure s2 = new TestStructure();
// Make padding bits non-zero
s2.getPointer().setInt(0, -1);
s2.write();
assertTrue("Structure equals should ignore padding", s1.equals(s2));
}
public void testRecursiveWrite() {
class TestStructureByRef extends Structure implements Structure.ByReference{
public TestStructureByRef(Pointer p) { super(p); }
public TestStructureByRef() { }
public int unique;
public TestStructureByRef s;
}
TestStructureByRef s = new TestStructureByRef();
s.s = new TestStructureByRef();
s.unique = 1;
s.s.s = s;
s.s.unique = 2;
s.write();
assertEquals("Structure field contents not written",
1, s.getPointer().getInt(0));
assertEquals("ByReference structure field contents not written",
2, s.s.getPointer().getInt(0));
s.s.unique = 0;
Structure value = s.s;
s.read();
assertEquals("ByReference structure field not preserved", value, s.s);
assertEquals("ByReference structure field contents not read",
2, s.s.unique);
assertTrue("Temporary storage should be cleared",
s.busy().isEmpty());
}
public static class CyclicTestStructure extends Structure {
public static class ByReference extends CyclicTestStructure implements Structure.ByReference {}
public CyclicTestStructure(Pointer p) { super(p); }
public CyclicTestStructure() { }
public CyclicTestStructure.ByReference next;
}
public void testCyclicRead() {
CyclicTestStructure s = new CyclicTestStructure();
s.next = new CyclicTestStructure.ByReference();
Structure value = s.next;
s.next.next = s.next;
s.write();
s.read();
assertEquals("ByReference structure field not preserved", value, s.next);
value = s.next;
s.next.next = null;
s.read();
assertSame("ByReference structure field should reuse existing value",
value, s.next);
assertSame("Nested ByReference structure field should reuse existing value",
value, s.next.next);
}
public void testAvoidMemoryAllocationInPointerCTOR() {
class TestStructure extends Structure {
public int field;
public TestStructure(Pointer p) {
super(p);
}
protected Memory autoAllocate(int size) {
fail("Memory should not be auto-allocated");
return null;
}
}
Memory p = new Memory(4);
Structure s = new TestStructure(p);
}
}