159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/* 259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Copyright (c) 2009-2012 jMonkeyEngine 359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * All rights reserved. 459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Redistribution and use in source and binary forms, with or without 659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * modification, are permitted provided that the following conditions are 759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * met: 859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Redistributions of source code must retain the above copyright 1059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * notice, this list of conditions and the following disclaimer. 1159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Redistributions in binary form must reproduce the above copyright 1359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * notice, this list of conditions and the following disclaimer in the 1459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * documentation and/or other materials provided with the distribution. 1559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 1759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * may be used to endorse or promote products derived from this software 1859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * without specific prior written permission. 1959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 2059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 2459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 2759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 2859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 2959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 3259b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapackage com.jme3.scene.plugins.blender.file; 3359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3459b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.jme3.asset.AssetManager; 3559b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.jme3.scene.plugins.blender.exceptions.BlenderFileException; 3659b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport java.io.BufferedInputStream; 3759b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport java.io.ByteArrayInputStream; 3859b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport java.io.IOException; 3959b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport java.io.InputStream; 4059b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport java.util.logging.Logger; 4159b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport java.util.zip.GZIPInputStream; 4259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/** 4459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * An input stream with random access to data. 4559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @author Marcin Roguski 4659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 4759b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapublic class BlenderInputStream extends InputStream { 4859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private static final Logger LOGGER = Logger.getLogger(BlenderInputStream.class.getName()); 5059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** The default size of the blender buffer. */ 5159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private static final int DEFAULT_BUFFER_SIZE = 1048576; //1MB 5259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** The application's asset manager. */ 5359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private AssetManager assetManager; 5459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 5559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Size of a pointer; all pointers in the file are stored in this format. '_' means 4 bytes and '-' means 8 bytes. 5659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 5759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private int pointerSize; 5859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 5959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Type of byte ordering used; 'v' means little endian and 'V' means big endian. 6059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 6159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private char endianess; 6259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** Version of Blender the file was created in; '248' means version 2.48. */ 6359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private String versionNumber; 6459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** The buffer we store the read data to. */ 6559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta protected byte[] cachedBuffer; 6659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** The total size of the stored data. */ 6759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta protected int size; 6859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** The current position of the read cursor. */ 6959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta protected int position; 7059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** The input stream we read the data from. */ 7159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta protected InputStream inputStream; 7259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 7359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 7459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Constructor. The input stream is stored and used to read data. 7559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param inputStream 7659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * the stream we read data from 7759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param assetManager 7859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * the application's asset manager 7959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @throws BlenderFileException 8059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * this exception is thrown if the file header has some invalid data 8159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 8259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public BlenderInputStream(InputStream inputStream, AssetManager assetManager) throws BlenderFileException { 8359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.assetManager = assetManager; 8459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.inputStream = inputStream; 8559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //the size value will canche while reading the file; the available() method cannot be counted on 8659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta try { 8759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta size = inputStream.available(); 8859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } catch (IOException e) { 8959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta size = 0; 9059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (size <= 0) { 9259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta size = BlenderInputStream.DEFAULT_BUFFER_SIZE; 9359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 9559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //buffered input stream is used here for much faster file reading 9659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta BufferedInputStream bufferedInputStream; 9759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (inputStream instanceof BufferedInputStream) { 9859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta bufferedInputStream = (BufferedInputStream) inputStream; 9959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } else { 10059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta bufferedInputStream = new BufferedInputStream(inputStream); 10159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 10259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 10359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta try { 10459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.readStreamToCache(bufferedInputStream); 10559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } catch (IOException e) { 10659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta throw new BlenderFileException("Problems occured while caching the file!", e); 10759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 10859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 10959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta try { 11059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.readFileHeader(); 11159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } catch (BlenderFileException e) {//the file might be packed, don't panic, try one more time ;) 11259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.decompressFile(); 11359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.position = 0; 11459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.readFileHeader(); 11559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 11659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 11759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 11859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 11959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method reads the whole stream into a buffer. 12059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param inputStream 12159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * the stream to read the file data from 12259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @throws IOException 12359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * an exception is thrown when data read from the stream is invalid or there are problems with i/o 12459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * operations 12559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 12659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private void readStreamToCache(InputStream inputStream) throws IOException { 12759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int data = inputStream.read(); 12859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta cachedBuffer = new byte[size]; 12959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta size = 0;//this will count the actual size 13059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta while (data != -1) { 13159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta cachedBuffer[size++] = (byte) data; 13259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (size >= cachedBuffer.length) {//widen the cached array 13359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta byte[] newBuffer = new byte[cachedBuffer.length + (cachedBuffer.length >> 1)]; 13459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta System.arraycopy(cachedBuffer, 0, newBuffer, 0, cachedBuffer.length); 13559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta cachedBuffer = newBuffer; 13659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 13759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta data = inputStream.read(); 13859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 13959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 14059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 14159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 14259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method is used when the blender file is gzipped. It decompresses the data and stores it back into the 14359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * cachedBuffer field. 14459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 14559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private void decompressFile() { 14659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta GZIPInputStream gis = null; 14759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta try { 14859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta gis = new GZIPInputStream(new ByteArrayInputStream(cachedBuffer)); 14959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.readStreamToCache(gis); 15059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } catch (IOException e) { 15159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta throw new IllegalStateException("IO errors occured where they should NOT! " 15259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta + "The data is already buffered at this point!", e); 15359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } finally { 15459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta try { 15559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (gis != null) { 15659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta gis.close(); 15759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 15859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } catch (IOException e) { 15959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta LOGGER.warning(e.getMessage()); 16059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 16159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 16259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 16359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 16459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 16559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method loads the header from the given stream during instance creation. 16659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param inputStream 16759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * the stream we read the header from 16859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @throws BlenderFileException 16959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * this exception is thrown if the file header has some invalid data 17059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 17159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private void readFileHeader() throws BlenderFileException { 17259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta byte[] identifier = new byte[7]; 17359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int bytesRead = this.readBytes(identifier); 17459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (bytesRead != 7) { 17559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta throw new BlenderFileException("Error reading header identifier. Only " + bytesRead + " bytes read and there should be 7!"); 17659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 17759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta String strIdentifier = new String(identifier); 17859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (!"BLENDER".equals(strIdentifier)) { 17959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta throw new BlenderFileException("Wrong file identifier: " + strIdentifier + "! Should be 'BLENDER'!"); 18059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 18159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta char pointerSizeSign = (char) this.readByte(); 18259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (pointerSizeSign == '-') { 18359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta pointerSize = 8; 18459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } else if (pointerSizeSign == '_') { 18559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta pointerSize = 4; 18659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } else { 18759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta throw new BlenderFileException("Invalid pointer size character! Should be '_' or '-' and there is: " + pointerSizeSign); 18859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 18959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta endianess = (char) this.readByte(); 19059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (endianess != 'v' && endianess != 'V') { 19159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta throw new BlenderFileException("Unknown endianess value! 'v' or 'V' expected and found: " + endianess); 19259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 19359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta byte[] versionNumber = new byte[3]; 19459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta bytesRead = this.readBytes(versionNumber); 19559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (bytesRead != 3) { 19659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta throw new BlenderFileException("Error reading version numberr. Only " + bytesRead + " bytes read and there should be 3!"); 19759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 19859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.versionNumber = new String(versionNumber); 19959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 20059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 20159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta @Override 20259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public int read() throws IOException { 20359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return this.readByte(); 20459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 20559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 20659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 20759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method reads 1 byte from the stream. 20859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * It works just in the way the read method does. 20959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * It just not throw an exception because at this moment the whole file 21059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * is loaded into buffer, so no need for IOException to be thrown. 21159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return a byte from the stream (1 bytes read) 21259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 21359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public int readByte() { 21459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return cachedBuffer[position++] & 0xFF; 21559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 21659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 21759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 21859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method reads a bytes number big enough to fill the table. 21959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * It does not throw exceptions so it is for internal use only. 22059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param bytes 22159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * an array to be filled with data 22259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return number of read bytes (a length of array actually) 22359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 22459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private int readBytes(byte[] bytes) { 22559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for (int i = 0; i < bytes.length; ++i) { 22659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta bytes[i] = (byte) this.readByte(); 22759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 22859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return bytes.length; 22959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 23059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 23159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 23259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method reads 2-byte number from the stream. 23359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return a number from the stream (2 bytes read) 23459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 23559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public int readShort() { 23659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int part1 = this.readByte(); 23759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int part2 = this.readByte(); 23859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (endianess == 'v') { 23959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return (part2 << 8) + part1; 24059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } else { 24159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return (part1 << 8) + part2; 24259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 24359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 24459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 24559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 24659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method reads 4-byte number from the stream. 24759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return a number from the stream (4 bytes read) 24859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 24959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public int readInt() { 25059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int part1 = this.readByte(); 25159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int part2 = this.readByte(); 25259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int part3 = this.readByte(); 25359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int part4 = this.readByte(); 25459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (endianess == 'v') { 25559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return (part4 << 24) + (part3 << 16) + (part2 << 8) + part1; 25659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } else { 25759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return (part1 << 24) + (part2 << 16) + (part3 << 8) + part4; 25859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 25959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 26059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 26159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 26259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method reads 4-byte floating point number (float) from the stream. 26359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return a number from the stream (4 bytes read) 26459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 26559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public float readFloat() { 26659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int intValue = this.readInt(); 26759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return Float.intBitsToFloat(intValue); 26859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 26959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 27059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 27159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method reads 8-byte number from the stream. 27259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return a number from the stream (8 bytes read) 27359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 27459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public long readLong() { 27559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta long part1 = this.readInt(); 27659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta long part2 = this.readInt(); 27759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta long result = -1; 27859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (endianess == 'v') { 27959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta result = part2 << 32 | part1; 28059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } else { 28159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta result = part1 << 32 | part2; 28259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 28359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return result; 28459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 28559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 28659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 28759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method reads 8-byte floating point number (double) from the stream. 28859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return a number from the stream (8 bytes read) 28959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 29059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public double readDouble() { 29159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta long longValue = this.readLong(); 29259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return Double.longBitsToDouble(longValue); 29359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 29459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 29559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 29659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method reads the pointer value. Depending on the pointer size defined in the header, the stream reads either 29759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 4 or 8 bytes of data. 29859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return the pointer value 29959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 30059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public long readPointer() { 30159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (pointerSize == 4) { 30259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return this.readInt(); 30359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 30459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return this.readLong(); 30559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 30659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 30759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 30859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method reads the string. It assumes the string is terminated with zero in the stream. 30959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return the string read from the stream 31059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 31159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public String readString() { 31259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta StringBuilder stringBuilder = new StringBuilder(); 31359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int data = this.readByte(); 31459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta while (data != 0) { 31559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta stringBuilder.append((char) data); 31659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta data = this.readByte(); 31759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 31859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return stringBuilder.toString(); 31959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 32059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 32159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 32259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method sets the current position of the read cursor. 32359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param position 32459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * the position of the read cursor 32559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 32659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public void setPosition(int position) { 32759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.position = position; 32859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 32959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 33059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 33159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method returns the position of the read cursor. 33259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return the position of the read cursor 33359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 33459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public int getPosition() { 33559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return position; 33659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 33759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 33859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 33959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method returns the blender version number where the file was created. 34059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return blender version number 34159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 34259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public String getVersionNumber() { 34359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return versionNumber; 34459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 34559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 34659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 34759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method returns the size of the pointer. 34859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return the size of the pointer 34959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 35059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public int getPointerSize() { 35159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return pointerSize; 35259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 35359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 35459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 35559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method returns the application's asset manager. 35659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return the application's asset manager 35759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 35859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public AssetManager getAssetManager() { 35959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return assetManager; 36059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 36159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 36259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 36359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * This method aligns cursor position forward to a given amount of bytes. 36459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param bytesAmount 36559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * the byte amount to which we aligh the cursor 36659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 36759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public void alignPosition(int bytesAmount) { 36859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (bytesAmount <= 0) { 36959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta throw new IllegalArgumentException("Alignment byte number shoulf be positivbe!"); 37059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 37159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta long move = position % bytesAmount; 37259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (move > 0) { 37359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta position += bytesAmount - move; 37459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 37559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 37659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 37759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta @Override 37859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public void close() throws IOException { 37959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta inputStream.close(); 38059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// cachedBuffer = null; 38159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// size = position = 0; 38259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 38359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta} 384