| /* ==================================================================== |
| 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; |
| |
| /** |
| * A Pointer from v5 |
| */ |
| public final class PointerV5 extends Pointer { |
| // TODO Are these getters correct? |
| public boolean destinationHasStrings() { |
| return (0x40 <= format && format < 0x50); |
| } |
| public boolean destinationHasPointers() { |
| if(type == 20) { |
| return true; |
| } |
| if(type == 22) { |
| return false; |
| } |
| if(format == 0x1d || format == 0x1e) { |
| return true; |
| } |
| return (0x50 <= format && format < 0x60); |
| } |
| public boolean destinationHasChunks() { |
| if (type == 21) { |
| return true; |
| } |
| if (type == 24) { |
| return true; |
| } |
| return (0xd0 <= format && format < 0xdf); |
| } |
| |
| public boolean destinationCompressed() { |
| // Apparently, it's the second least significant bit |
| return (format & 2) > 0; |
| } |
| |
| /** |
| * With v6 pointers, the on-disk size is 16 bytes |
| */ |
| public int getSizeInBytes() { return 16; } |
| |
| /** |
| * Depends on the type only, not stored |
| */ |
| public int getNumPointersOffset(byte[] data) { |
| switch (type) { |
| case 0x1d: |
| case 0x4e: |
| return 30; |
| case 0x1e: |
| return 54; |
| case 0x14: |
| return 130; |
| } |
| return 10; |
| } |
| /** |
| * 16 bit int at the given offset |
| */ |
| public int getNumPointers(int offset, byte[] data) { |
| // V5 stores it as a 16 bit number at the offset |
| return LittleEndian.getShort(data, offset); |
| } |
| /** |
| * Just the 2 bytes of the number of pointers |
| */ |
| public int getPostNumPointersSkip() { |
| return 2; |
| } |
| } |