--- /dev/null
+/* ====================================================================
+ 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 org.apache.poi.hdgf.pointers;
+
+/**
+ * Base class of pointers, which hold metadata and offsets about
+ * blocks elsewhere in the file
+ */
+public abstract class Pointer {
+ protected int type;
+ protected int address;
+ protected int offset;
+ protected int length;
+ protected short format;
+
+ public int getAddress() {
+ return address;
+ }
+ public short getFormat() {
+ return format;
+ }
+ public int getLength() {
+ return length;
+ }
+ public int getOffset() {
+ return offset;
+ }
+ public int getType() {
+ return type;
+ }
+
+ public abstract int getSizeInBytes();
+ public abstract boolean destinationHasStrings();
+ public abstract boolean destinationHasPointers();
+ public abstract boolean destinationHasChunks();
+ public abstract boolean destinationCompressed();
+}
--- /dev/null
+/* ====================================================================
+ 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 org.apache.poi.hdgf.pointers;
+
+import org.apache.poi.util.LittleEndian;
+
+/**
+ * Factor class to create the appropriate pointers, based on the version
+ * of the file
+ */
+public class PointerFactory {
+ private int version;
+ public PointerFactory(int version) {
+ this.version = version;
+ }
+
+ public Pointer createPointer(byte[] data, int offset) {
+ Pointer p;
+ if(version >= 6) {
+ p = new PointerV6();
+ p.type = LittleEndian.getInt(data, offset+0);
+ p.address = (int)LittleEndian.getUInt(data, offset+4);
+ p.offset = (int)LittleEndian.getUInt(data, offset+8);
+ p.length = (int)LittleEndian.getUInt(data, offset+12);
+ p.format = LittleEndian.getShort(data, offset+16);
+
+ return p;
+ } else if(version == 5) {
+ throw new RuntimeException("TODO");
+ } else {
+ throw new IllegalArgumentException("Visio files with versions below 5 are not supported, yours was " + version);
+ }
+ }
+}
--- /dev/null
+/* ====================================================================
+ 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 org.apache.poi.hdgf.pointers;
+
+/**
+ * A Pointer from v6+
+ */
+public class PointerV6 extends Pointer {
+ public boolean destinationHasStrings() {
+ return (0x40 <= format && format < 0x50);
+ }
+ public boolean destinationHasPointers() {
+ if(type == 20) return true;
+ if(format == 0x1d || format == 0x1e) return true;
+ return (0x50 <= format && format < 0x60);
+ }
+ public boolean destinationHasChunks() {
+ return (0xd0 <= format && format < 0xd0);
+ }
+
+ public boolean destinationCompressed() {
+ // Apparently, it's the second least significant bit
+ return (format & 2) > 0;
+ }
+
+ /**
+ * With v6 pointers, the on-disk size is 18 bytes
+ */
+ public int getSizeInBytes() { return 18; }
+}
--- /dev/null
+/* ====================================================================
+ 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 org.apache.poi.hdgf.pointers;
+
+import junit.framework.TestCase;
+
+/**
+ * Tests for the pointer factory, and the pointers themselves
+ */
+public class TestPointerFactory extends TestCase {
+ // Type: 16 Addr: 0143aff4 Offset: 80 Len: 54 Format: 46 From: 8a94
+ private static byte[] vp6_a = new byte[] {
+ 22, 0, 0, 0, -12, -81, 67, 1, -128, 0, 0, 0, 84, 0, 0, 0, 70, 0
+ };
+ // Type: 17 Addr: 014fd84c Offset: d4 Len: 20 Format: 54 From: 8a94
+ private static byte[] vp6_b = new byte[] {
+ 23, 0, 0, 0, 76, -40, 79, 1, -44, 0, 0, 0, 32, 0, 0, 0, 84, 0
+ };
+ // Type: 17 Addr: 014fd8bc Offset: f8 Len: 20 Format: 54 From: 8a94
+ private static byte[] vp6_c = new byte[] {
+ 23, 0, 0, 0, -68, -40, 79, 1, -8, 0, 0, 0, 32, 0, 0, 0, 84, 0
+ };
+ // Type: ff Addr: 014fffac Offset: 0 Len: 0 Format: 60 From: 8a94
+ private static byte[] vp6_d = new byte[] {
+ -1, 0, 0, 0, -84, -1, 79, 1, 0, 0, 0, 0, 0, 0, 0, 0, 96, 0
+ };
+
+ public void testCreateV4() throws Exception {
+ PointerFactory pf = new PointerFactory(4);
+ try {
+ pf.createPointer(new byte[]{}, 0);
+ fail();
+ } catch(IllegalArgumentException e) {
+ // As expected
+ }
+ }
+
+ public void testCreateV5() throws Exception {
+ PointerFactory pf = new PointerFactory(5);
+ try {
+ pf.createPointer(new byte[]{}, 0);
+ fail();
+ } catch(RuntimeException e) {
+ // Still to do
+ assertEquals("TODO", e.getMessage());
+ }
+ }
+
+ public void testCreateV6() throws Exception {
+ PointerFactory pf = new PointerFactory(6);
+
+ Pointer a = pf.createPointer(vp6_a, 0);
+ assertEquals(0x16, a.getType());
+ assertEquals(0x0143aff4, a.getAddress());
+ assertEquals(0x80, a.getOffset());
+ assertEquals(0x54, a.getLength());
+ assertEquals(0x46, a.getFormat());
+
+ assertTrue(a.destinationCompressed());
+ assertTrue(a.destinationHasStrings());
+ assertFalse(a.destinationHasChunks());
+ assertFalse(a.destinationHasPointers());
+
+ assertEquals(18, a.getSizeInBytes());
+
+
+ Pointer b = pf.createPointer(vp6_b, 0);
+ assertEquals(0x17, b.getType());
+ assertEquals(0x014fd84c, b.getAddress());
+ assertEquals(0xd4, b.getOffset());
+ assertEquals(0x20, b.getLength());
+ assertEquals(0x54, b.getFormat());
+
+ assertFalse(b.destinationCompressed());
+ assertFalse(b.destinationHasStrings());
+ assertFalse(b.destinationHasChunks());
+ assertTrue(b.destinationHasPointers());
+
+ Pointer c = pf.createPointer(vp6_c, 0);
+ assertEquals(0x17, c.getType());
+ assertEquals(0x014fd8bc, c.getAddress());
+ assertEquals(0xf8, c.getOffset());
+ assertEquals(0x20, c.getLength());
+ assertEquals(0x54, c.getFormat());
+
+ assertFalse(c.destinationCompressed());
+ assertFalse(c.destinationHasStrings());
+ assertFalse(c.destinationHasChunks());
+ assertTrue(c.destinationHasPointers());
+
+ // Type: ff Addr: 014fffac Offset: 0 Len: 0 Format: 60 From: 8a94
+ Pointer d = pf.createPointer(vp6_d, 0);
+ assertEquals(0xff, d.getType());
+ assertEquals(0x014fffac, d.getAddress());
+ assertEquals(0x00, d.getOffset());
+ assertEquals(0x00, d.getLength());
+ assertEquals(0x60, d.getFormat());
+
+ assertFalse(d.destinationCompressed());
+ assertFalse(d.destinationHasStrings());
+ assertFalse(d.destinationHasChunks());
+ assertFalse(d.destinationHasPointers());
+ }
+
+ public void testCreateV6FromMid() throws Exception {
+ PointerFactory pf = new PointerFactory(11);
+
+ // Create a from part way down the byte stream
+ byte[] bytes = new byte[28];
+ System.arraycopy(vp6_b, 0, bytes, 0, 10);
+ System.arraycopy(vp6_a, 0, bytes, 10, 18);
+
+ Pointer a = pf.createPointer(bytes, 10);
+ assertEquals(0x16, a.getType());
+ assertEquals(0x0143aff4, a.getAddress());
+ assertEquals(0x80, a.getOffset());
+ assertEquals(0x54, a.getLength());
+ assertEquals(0x46, a.getFormat());
+
+ assertTrue(a.destinationCompressed());
+ assertTrue(a.destinationHasStrings());
+ assertFalse(a.destinationHasChunks());
+ assertFalse(a.destinationHasPointers());
+ }
+}
projects / poi.git / commitdiff