svn-gvsig-desktop / trunk / libraries / libDwg / src / com / iver / cit / jdwglib / dwg / DwgUtil.java @ 2896
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/* jdwglib. Java Library for reading Dwg files.
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*
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* Author: Jose Morell Rama (jose.morell@gmail.com).
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* Port from the Pythoncad Dwg library by Art Haas.
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*
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* Copyright (C) 2005 Jose Morell, IVER TI S.A. and Generalitat Valenciana
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Jose Morell (jose.morell@gmail.com)
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*
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* or
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*
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* IVER TI S.A.
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* C/Salamanca, 50
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* 46005 Valencia
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* Spain
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* +34 963163400
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* dac@iver.es
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*/
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package com.iver.cit.jdwglib.dwg; |
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import java.nio.ByteBuffer; |
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import java.nio.ByteOrder; |
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import java.util.Vector; |
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import com.iver.cit.gvsig.fmap.drivers.dgn.ByteUtils; |
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import freenet.support.HexUtil; |
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/**
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* The DwgUtil class contains the essential set of functions for reading bitstreams
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* in DWG files
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*
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* @author jmorell
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*/
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public final class DwgUtil { |
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/**
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* Read the extended data for a DWG object
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* Don't use in this version. Serious bugs detected
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*
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* @param data Array of unsigned bytes obtained from the DWG binary file
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* @param offset The current bit offset where the value begins
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* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
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* when we are looking for LwPolylines.
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* @return Vector This vector has two parts. First is an int value that represents
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* the new offset, and second is the extended data of a DWG object
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*/
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public static Vector readExtendedData(int[] data, int offset) throws Exception { |
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int bitPos = offset;
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Vector extData = new Vector(); |
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while (true) { |
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int newBitPos = ((Integer)getBitShort(data, bitPos).get(0)).intValue(); |
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int size = ((Integer)getBitShort(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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if (size==0) { |
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break;
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} |
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newBitPos = ((Integer)((Vector)getHandle(data, bitPos)).get(0)).intValue(); |
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// TODO: Esto no es correcto. Repasar ...
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int handle = ((Integer)((Vector)getHandle(data, bitPos)).get(1)).intValue(); |
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bitPos = newBitPos; |
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Vector eedata = new Vector(); |
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while (size>0) { |
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newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue(); |
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int cb = ((Integer)getRawChar(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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size = size-1;
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if (cb==0x0) { |
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newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue(); |
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int len = ((Integer)getRawChar(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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newBitPos = ((Integer)getRawShort(data, bitPos).get(0)).intValue(); |
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int cp = ((Integer)getRawShort(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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Vector chars = new Vector(); |
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for (int i=0; i<len; i++) { |
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newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue(); |
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int charr = ((Integer)getRawChar(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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// ?int o char?
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chars.add(new Integer(charr)); |
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} |
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// Incorrecto. Repasar ...
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eedata.add(chars); |
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size = size-len-3;
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} else if (cb==0x1) { |
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System.out.println("Invalid EXX code byte: 0x1"); |
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} else if (cb==0x2) { |
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newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue(); |
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int charr = ((Integer)getRawChar(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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if (charr==0x0) { |
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eedata.add("{");
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} else if (charr==0x1) { |
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eedata.add("}");
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} else {
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System.out.println("Unexpected EXX char: " + charr); |
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} |
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size = size - 1;
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} else if (cb==0x3 || cb==0x5) { |
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Vector chars = new Vector(); |
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for (int i=0; i<8; i++) { |
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newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue(); |
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int charr = ((Integer)getRawChar(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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chars.add(new Integer(charr)); |
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} |
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eedata.add(chars); |
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size = size - 8;
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} else if (cb==0x4) { |
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newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue(); |
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int len = ((Integer)getRawChar(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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Vector chars = new Vector(); |
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for (int i=0; i<len; i++) { |
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newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue(); |
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int charr = ((Integer)getRawChar(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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chars.add(new Integer(charr)); |
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} |
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eedata.add(chars); |
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size = size - len -1;
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} else if (0xa<=cb && cb<=0xd) { |
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newBitPos = ((Integer)((Vector)getRawDouble(data, bitPos)).get(0)).intValue(); |
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double d1 = ((Double)((Vector)getRawDouble(data, bitPos)).get(1)).doubleValue(); |
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bitPos = newBitPos; |
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newBitPos = ((Integer)((Vector)getRawDouble(data, bitPos)).get(0)).intValue(); |
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double d2 = ((Double)((Vector)getRawDouble(data, bitPos)).get(1)).doubleValue(); |
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bitPos = newBitPos; |
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newBitPos = ((Integer)((Vector)getRawDouble(data, bitPos)).get(0)).intValue(); |
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double d3 = ((Double)((Vector)getRawDouble(data, bitPos)).get(1)).doubleValue(); |
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bitPos = newBitPos; |
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eedata.add(new double[]{d1, d2, d3}); |
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size = size - 24;
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} else if (0x28<=cb && cb<=0x2a) { |
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newBitPos = ((Integer)((Vector)getRawDouble(data, bitPos)).get(0)).intValue(); |
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double d = ((Double)((Vector)getRawDouble(data, bitPos)).get(1)).doubleValue(); |
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bitPos = newBitPos; |
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eedata.add(new Double(d)); |
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size=size-8;
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} else if (cb==0x46) { |
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newBitPos = ((Integer)getRawShort(data, bitPos).get(0)).intValue(); |
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int shortt = ((Integer)getRawShort(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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eedata.add(new Integer(shortt)); |
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size=size-2;
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} else if (cb==0x47) { |
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newBitPos = ((Integer)getRawLong(data, bitPos).get(0)).intValue(); |
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int longg = ((Integer)getRawLong(data, bitPos).get(1)).intValue(); |
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bitPos = newBitPos; |
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eedata.add(new Integer(longg)); |
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size=size-4;
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} else {
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System.out.println("Unexpected code byte: " + cb); |
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} |
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} |
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Vector v = new Vector(); |
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//v.add(handle, eedata);
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extData.add(v); |
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} |
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Vector v = new Vector(); |
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v.add(new Integer(bitPos)); |
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v.add(extData); |
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return v;
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} |
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/**
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* Read a double value from a group of unsigned bytes and a default double
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*
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* @param data Array of unsigned bytes obtained from the DWG binary file
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* @param offset The current bit offset where the value begins
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* @param defVal Default double value
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* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
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* when we are looking for LwPolylines.
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* @return Vector This vector has two parts. First is an int value that represents
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* the new offset, and second is the double value
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*/
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public static Vector getDefaultDouble(int[] data, int offset, double defVal) throws Exception { |
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int flags = ((Integer)getBits(data, 2, offset)).intValue(); |
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int read = 2; |
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double val;
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if (flags==0x0) { |
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val = defVal; |
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} else {
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int _offset = offset + 2; |
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String dstr;
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if (flags==0x3) { |
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byte[] bytes = (byte[])getBits(data, 64, _offset); |
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ByteBuffer bb = ByteBuffer.wrap(bytes); |
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bb.order(ByteOrder.LITTLE_ENDIAN);
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val = bb.getDouble(); |
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read = 66;
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} else {
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byte[] dstrArrayAux = new byte[8]; |
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int[] doubleOffset = new int[]{0}; |
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ByteUtils.doubleToBytes(defVal, dstrArrayAux, doubleOffset); |
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byte[] dstrArrayAuxx = new byte[8]; |
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dstrArrayAuxx[0] = dstrArrayAux[7]; |
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dstrArrayAuxx[1] = dstrArrayAux[6]; |
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dstrArrayAuxx[2] = dstrArrayAux[5]; |
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dstrArrayAuxx[3] = dstrArrayAux[4]; |
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dstrArrayAuxx[4] = dstrArrayAux[3]; |
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dstrArrayAuxx[5] = dstrArrayAux[2]; |
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dstrArrayAuxx[6] = dstrArrayAux[1]; |
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dstrArrayAuxx[7] = dstrArrayAux[0]; |
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int[] dstrArrayAuxxx = new int[8]; |
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for (int i=0;i<dstrArrayAuxxx.length;i++) { |
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dstrArrayAuxxx[i] = ByteUtils.getUnsigned(dstrArrayAuxx[i]); |
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} |
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byte[] dstrArray = new byte[8]; |
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for (int i=0;i<dstrArray.length;i++) { |
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dstrArray[i] = (byte)dstrArrayAuxxx[i];
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} |
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if (flags==0x1) { |
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byte[] ddArray = (byte[])getBits(data, 32, _offset); |
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dstrArray[0] = ddArray[0]; |
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dstrArray[1] = ddArray[1]; |
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dstrArray[2] = ddArray[2]; |
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dstrArray[3] = ddArray[3]; |
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read = 34;
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} else {
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byte[] ddArray = (byte[])getBits(data, 48, _offset); |
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dstrArray[4] = ddArray[0]; |
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dstrArray[5] = ddArray[1]; |
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dstrArray[0] = ddArray[2]; |
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dstrArray[1] = ddArray[3]; |
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dstrArray[2] = ddArray[4]; |
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dstrArray[3] = ddArray[5]; |
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read = 50;
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} |
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ByteBuffer bb = ByteBuffer.wrap(dstrArray); |
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bb.order(ByteOrder.LITTLE_ENDIAN);
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val = bb.getDouble(); |
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} |
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} |
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Vector v = new Vector(); |
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v.add(new Integer(offset+read)); |
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v.add(new Double(val)); |
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return v;
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} |
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/**
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* Read a double value from a group of unsigned bytes
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*
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* @param data Array of unsigned bytes obtained from the DWG binary file
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* @param offset The current bit offset where the value begins
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* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
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* when we are looking for LwPolylines.
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* @return Vector This vector has two parts. First is an int value that represents
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* the new offset, and second is the double value
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*/
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public static Vector getBitDouble(int[] data, int offset) throws Exception { |
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Vector v = new Vector(); |
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int type = ((Integer)getBits(data, 2, offset)).intValue(); |
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int read = 2; |
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double val = 0.0; |
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if (type==0x00) { |
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byte[] bytes = (byte[])getBits(data, 64, (offset+2)); |
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ByteBuffer bb = ByteBuffer.wrap(bytes); |
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bb.order(ByteOrder.LITTLE_ENDIAN);
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val = bb.getDouble(); |
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read = 66;
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} else if (type==0x01) { |
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val = 1.0;
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} else if (type==0x02) { |
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val = 0.0;
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} else {
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System.out.println("Bad type at bit offset: " + offset); |
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} |
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v.add(new Integer(offset+read)); |
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v.add(new Double(val)); |
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return v;
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} |
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/**
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* Read a double value from a group of unsigned bytes
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*
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* @param data Array of unsigned bytes obtained from the DWG binary file
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* @param offset The current bit offset where the value begins
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* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
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* when we are looking for LwPolylines.
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* @return Vector This vector has two parts. First is an int value that represents
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* the new offset, and second is the double value
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*/
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public static Vector getRawDouble(int[] data, int offset) throws Exception { |
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byte[] bytes = (byte[])getBits(data, 64, offset); |
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ByteBuffer bb = ByteBuffer.wrap(bytes); |
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bb.order(ByteOrder.LITTLE_ENDIAN);
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double val = bb.getDouble();
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Vector v = new Vector(); |
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v.add(new Integer(offset+64)); |
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v.add(new Double(val)); |
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return v;
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} |
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/**
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* Read a short value from a group of unsigned bytes
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*
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* @param data Array of unsigned bytes obtained from the DWG binary file
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* @param offset The current bit offset where the value begins
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* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
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* when we are looking for LwPolylines.
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* @return Vector This vector has two parts. First is an int value that represents
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* the new offset, and second is the short value
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*/
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public static Vector getBitShort(int[] data, int offset) throws Exception { |
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Vector v = new Vector(); |
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int type = ((Integer)getBits(data, 2, offset)).intValue(); |
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int read = 2; |
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int val = 0; |
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if (type==0x00) { |
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byte[] bytes = (byte[])getBits(data, 16, (offset+2)); |
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ByteBuffer bb = ByteBuffer.wrap(bytes); |
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bb.order(ByteOrder.LITTLE_ENDIAN);
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val = bb.getShort(); |
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read = 18;
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} else if (type==0x01) { |
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val = ((Integer)getBits(data, 8, (offset+2))).intValue(); |
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read = 10;
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} else if (type==0x02) { |
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val = 0;
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} else if (type==0x03) { |
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val = 256;
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} |
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v.add(new Integer(offset+read)); |
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v.add(new Integer(val)); |
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return v;
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} |
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/**
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* Read a short value from a group of unsigned bytes
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*
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* @param data Array of unsigned bytes obtained from the DWG binary file
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* @param offset The current bit offset where the value begins
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* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
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* when we are looking for LwPolylines.
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* @return Vector This vector has two parts. First is an int value that represents
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* the new offset, and second is the short value
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*/
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public static Vector getRawShort(int[] data, int offset) throws Exception { |
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byte[] bytes = (byte[])getBits(data, 16, offset); |
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ByteBuffer bb = ByteBuffer.wrap(bytes); |
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bb.order(ByteOrder.LITTLE_ENDIAN);
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int val = bb.getShort();
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Vector v = new Vector(); |
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v.add(new Integer(offset+16)); |
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v.add(new Integer(val)); |
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return v;
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} |
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/**
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* Read a long value from a group of unsigned bytes
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*
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* @param data Array of unsigned bytes obtained from the DWG binary file
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* @param offset The current bit offset where the value begins
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* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
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* when we are looking for LwPolylines.
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* @return Vector This vector has two parts. First is an int value that represents
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* the new offset, and second is the long value
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*/
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public static Vector getBitLong(int[] data, int offset) throws Exception { |
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int type = ((Integer)getBits(data, 2, offset)).intValue(); |
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int read = 2; |
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int val = 0; |
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if (type==0x0) { |
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byte[] bytes = (byte[])getBits(data, 32, (offset+2)); |
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ByteBuffer bb = ByteBuffer.wrap(bytes); |
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bb.order(ByteOrder.LITTLE_ENDIAN);
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val = bb.getInt(); |
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read = 34;
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} else if (type==0x01) { |
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val = ((Integer)getBits(data, 8, (offset+2))).intValue(); |
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read = 10;
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} else if (type==0x02) { |
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val = 0;
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} else {
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System.out.println("Bad type at bit offset: " + offset); |
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} |
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Vector v = new Vector(); |
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v.add(new Integer(offset+read)); |
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v.add(new Integer(val)); |
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return v;
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} |
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/**
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* Read a long value from a group of unsigned bytes
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*
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* @param data Array of unsigned bytes obtained from the DWG binary file
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* @param offset The current bit offset where the value begins
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* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
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* when we are looking for LwPolylines.
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* @return Vector This vector has two parts. First is an int value that represents
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* the new offset, and second is the long value
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*/
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public static Vector getRawLong(int[] data, int offset) { |
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Vector v = new Vector(); |
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// TODO: Incorrecto. Repasar ...
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// _val = struct.unpack('<l', _long)[0]
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int val = 0; |
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v.add(new Integer(offset+32)); |
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v.add(new Integer(val)); |
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return v;
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} |
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/**
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* Read a char value from a group of unsigned bytes
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*
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* @param data Array of unsigned bytes obtained from the DWG binary file
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* @param offset The current bit offset where the value begins
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* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
|
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* when we are looking for LwPolylines.
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* @return Vector This vector has two parts. First is an int value that represents
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* the new offset, and second is the char value
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*/
|
| 423 |
public static Vector getRawChar(int[] data, int offset) throws Exception { |
| 424 |
int charr = ((Integer)getBits(data, 8, offset)).intValue(); |
| 425 |
Vector v = new Vector(); |
| 426 |
v.add(new Integer(offset+8)); |
| 427 |
v.add(new Integer(charr)); |
| 428 |
return v;
|
| 429 |
} |
| 430 |
/**
|
| 431 |
* Read a char value from a group of unsigned bytes
|
| 432 |
*
|
| 433 |
* @param data Array of unsigned bytes obtained from the DWG binary file
|
| 434 |
* @param offset The current bit offset where the value begins
|
| 435 |
* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
|
| 436 |
* when we are looking for LwPolylines.
|
| 437 |
* @return Vector This vector has two parts. First is an int value that represents
|
| 438 |
* the new offset, and second is the char value
|
| 439 |
*/
|
| 440 |
public static Vector getModularChar(int[] data, int offset) throws Exception { |
| 441 |
int val=0; |
| 442 |
Vector bytes = new Vector(); |
| 443 |
boolean read = true; |
| 444 |
int offsett = offset;
|
| 445 |
int fac = 1; |
| 446 |
while (read) {
|
| 447 |
int bytee = ((Integer)getBits(data, 8, offsett)).intValue(); |
| 448 |
offsett = offsett + 8;
|
| 449 |
if ((bytee & 0x80)==0) { |
| 450 |
read = false;
|
| 451 |
if ((bytee & 0x40)>0) { |
| 452 |
fac = -1;
|
| 453 |
bytee = bytee & 0xbf;
|
| 454 |
} |
| 455 |
} |
| 456 |
bytes.add(new Integer(bytee & 0x7f)); |
| 457 |
} |
| 458 |
if (bytes.size()==1) val = ((Integer)bytes.get(0)).intValue(); |
| 459 |
else if (bytes.size()==2) val = ((Integer)bytes.get(0)).intValue() | (((Integer)bytes.get(1)).intValue() << 7); |
| 460 |
else if (bytes.size()==3) val = ((Integer)bytes.get(0)).intValue() | (((Integer)bytes.get(1)).intValue() << 7) | (((Integer)bytes.get(2)).intValue() << 14); |
| 461 |
else if (bytes.size()==4) val = ((Integer)bytes.get(0)).intValue() | (((Integer)bytes.get(1)).intValue() << 7) | (((Integer)bytes.get(2)).intValue() << 14) | (((Integer)bytes.get(3)).intValue() << 21); |
| 462 |
else System.out.println("Unexpected byte array length: " + bytes.size()); |
| 463 |
Vector v = new Vector(); |
| 464 |
v.add(new Integer(offsett)); |
| 465 |
v.add(new Integer(fac*val)); |
| 466 |
return v;
|
| 467 |
} |
| 468 |
/**
|
| 469 |
* Read a String from a group of unsigned bytes
|
| 470 |
*
|
| 471 |
* @param data Array of unsigned bytes obtained from the DWG binary file
|
| 472 |
* @param offset The current bit offset where the value begins
|
| 473 |
* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
|
| 474 |
* when we are looking for LwPolylines.
|
| 475 |
* @return Vector This vector has two parts. First is an int value that represents
|
| 476 |
* the new offset, and second is the String
|
| 477 |
*/
|
| 478 |
public static Vector getTextString(int[] data, int offset) throws Exception { |
| 479 |
int bitPos = offset;
|
| 480 |
int newBitPos = ((Integer)DwgUtil.getBitShort(data, bitPos).get(0)).intValue(); |
| 481 |
int len = ((Integer)DwgUtil.getBitShort(data, bitPos).get(1)).intValue(); |
| 482 |
bitPos = newBitPos; |
| 483 |
int bitLen = len * 8; |
| 484 |
Object cosa = DwgUtil.getBits(data, bitLen, bitPos);
|
| 485 |
String string;
|
| 486 |
if (cosa instanceof byte[]) { |
| 487 |
string = new String((byte[])cosa); |
| 488 |
} else {
|
| 489 |
//string = ((Integer)cosa).toString();
|
| 490 |
byte[] bytes = new byte[]{((Integer)cosa).byteValue()}; |
| 491 |
string = new String((byte[])bytes); |
| 492 |
} |
| 493 |
bitPos = bitPos + bitLen; |
| 494 |
Vector v = new Vector(); |
| 495 |
v.add(new Integer(bitPos)); |
| 496 |
v.add(string); |
| 497 |
return v;
|
| 498 |
} |
| 499 |
/**
|
| 500 |
* Read a int value (the handle of a DWG object) from a group of unsigned bytes
|
| 501 |
*
|
| 502 |
* @param data Array of unsigned bytes obtained from the DWG binary file
|
| 503 |
* @param offset The current bit offset where the value begins
|
| 504 |
* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
|
| 505 |
* when we are looking for LwPolylines.
|
| 506 |
* @return Vector This vector has two parts. First is an int value that represents
|
| 507 |
* the new offset, and second is the int value (handle of a DWG object)
|
| 508 |
*/
|
| 509 |
public static Vector getHandle(int[] data, int offset) throws Exception { |
| 510 |
Vector v = new Vector(); |
| 511 |
int code = ((Integer)DwgUtil.getBits(data, 4, offset)).intValue(); |
| 512 |
int counter = ((Integer)DwgUtil.getBits(data, 4, (offset + 4))).intValue(); |
| 513 |
int read = 8; |
| 514 |
Vector hlist = new Vector(); |
| 515 |
if (counter>0) { |
| 516 |
int hlen = counter * 8; |
| 517 |
Object handle = DwgUtil.getBits(data, hlen, (offset + 8)); |
| 518 |
read = read + hlen; |
| 519 |
if (hlen > 8) { |
| 520 |
byte[] handleBytes = (byte[])handle; |
| 521 |
int[] handleInts = new int[handleBytes.length]; |
| 522 |
// Hacerlos unsigned ...
|
| 523 |
for (int i=0; i<handleBytes.length; i++) { |
| 524 |
handleInts[i] = ByteUtils.getUnsigned(handleBytes[i]); |
| 525 |
} |
| 526 |
for (int i=0; i<handleInts.length; i++) { |
| 527 |
hlist.add(new Integer(handleInts[i])); |
| 528 |
} |
| 529 |
} else {
|
| 530 |
hlist.add(handle); |
| 531 |
} |
| 532 |
} |
| 533 |
v.add(new Integer(offset+read)); |
| 534 |
v.add(new Integer(code)); |
| 535 |
v.add(new Integer(counter)); |
| 536 |
for (int i=0;i<hlist.size();i++) { |
| 537 |
v.add(hlist.get(i)); |
| 538 |
} |
| 539 |
return v;
|
| 540 |
} |
| 541 |
/**
|
| 542 |
* Read a int value (the size of a modular short) from a ByteBuffer
|
| 543 |
*
|
| 544 |
* @param bb Data given as a ByteBuffer
|
| 545 |
* @return int Size of the modular short
|
| 546 |
*/
|
| 547 |
public static int getModularShort(ByteBuffer bb) { |
| 548 |
Vector shorts = new Vector(); |
| 549 |
bb.order(ByteOrder.BIG_ENDIAN);
|
| 550 |
short shortt = bb.getShort();
|
| 551 |
int size = 0; |
| 552 |
while ((shortt & 0x80)>0) { |
| 553 |
shorts.add(new Short(shortt)); |
| 554 |
shortt = bb.getShort(); |
| 555 |
} |
| 556 |
shorts.add(new Short(shortt)); |
| 557 |
for (int i=0; i<shorts.size(); i++) { |
| 558 |
shortt = ((Short)shorts.get(i)).shortValue();
|
| 559 |
shorts.set(i, new Integer(((shortt & 0xff00) >> 8) | ((shortt & 0xff) << 8))); |
| 560 |
} |
| 561 |
int slen = shorts.size();
|
| 562 |
if (slen==1) { |
| 563 |
size = (((Integer)shorts.get(0)).intValue()) & 0x7fff;//(new Integer(((Integer)shorts.get(0)).shortValue() & 0x7fff)).byteValue(); |
| 564 |
} else if (slen==2) { |
| 565 |
int tmp = ((Integer)shorts.get(0)).intValue(); |
| 566 |
shorts.set(0, shorts.get(1)); |
| 567 |
shorts.set(1, new Integer(tmp)); |
| 568 |
size = (((((Integer)shorts.get(0)).intValue()) & 0x7fff) << 15) | (((((Integer)shorts.get(1)).intValue()) & 0x7fff));//(new Integer(((Integer)shorts.get(0)).shortValue() & 0x7fff)).byteValue(); |
| 569 |
} else {
|
| 570 |
System.out.println("Unexpected array length: " + slen); |
| 571 |
} |
| 572 |
return size;
|
| 573 |
} |
| 574 |
/**
|
| 575 |
* Returns a set of bits from a group of unsigned bytes
|
| 576 |
*
|
| 577 |
* @param data Array of unsigned bytes obtained from the DWG binary file
|
| 578 |
* @param count Bit counter
|
| 579 |
* @param offset The current bit offset where the value begins
|
| 580 |
* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
|
| 581 |
* when we are looking for LwPolylines.
|
| 582 |
* @return This method returns an array of bytes or an int value
|
| 583 |
*/
|
| 584 |
public static Object getBits(int[] data, int count, int offset) throws Exception { |
| 585 |
int idx = offset/8; |
| 586 |
int bitidx = offset%8; |
| 587 |
/**
|
| 588 |
* mask1: bit mask to apply to the current byte
|
| 589 |
* lshift: left shift amount of mask results
|
| 590 |
* mask2: bit mask to apply to the next byte
|
| 591 |
* rshift: right shift amount of the mask results
|
| 592 |
*/
|
| 593 |
int[][] maskTable = new int[][]{ |
| 594 |
{0xff, 0, 0x00, 0}, // bit offset == 0
|
| 595 |
{0x7f, 1, 0x80, 7}, // bit offset == 1
|
| 596 |
{0x3f, 2, 0xc0, 6}, // bit offset == 2
|
| 597 |
{0x1f, 3, 0xe0, 5}, // bit offset == 3
|
| 598 |
{0x0f, 4, 0xf0, 4}, // bit offset == 4
|
| 599 |
{0x07, 5, 0xf8, 3}, // bit offset == 5
|
| 600 |
{0x03, 6, 0xfc, 2}, // bit offset == 6
|
| 601 |
{0x01, 7, 0xfe, 1}, // bit offset == 7
|
| 602 |
}; |
| 603 |
int mask1 = maskTable[bitidx][0]; |
| 604 |
int lsh = maskTable[bitidx][1]; |
| 605 |
int mask2 = maskTable[bitidx][2]; |
| 606 |
int rsh = maskTable[bitidx][3]; |
| 607 |
int binc = 8 - bitidx; |
| 608 |
int read = 0; |
| 609 |
int rem = count;
|
| 610 |
int bytee = 0x0; |
| 611 |
Vector bytes = new Vector(); |
| 612 |
while (read < count) {
|
| 613 |
int b1 = 0; |
| 614 |
if (rem > binc) {
|
| 615 |
b1 = (data[idx] & mask1); |
| 616 |
read = read + binc; |
| 617 |
rem = rem - binc; |
| 618 |
} else {
|
| 619 |
b1 = ((data[idx] & mask1) >> (8 - bitidx - rem));
|
| 620 |
bytee = b1; |
| 621 |
read = read + rem; |
| 622 |
rem = 0;
|
| 623 |
} |
| 624 |
if (read < count) {
|
| 625 |
idx = idx + 1;
|
| 626 |
if (rem > bitidx) {
|
| 627 |
int b2 = (data[idx] & mask2);
|
| 628 |
bytee = (b1 << lsh) | (b2 >> rsh); |
| 629 |
read = read + bitidx; |
| 630 |
rem = rem - bitidx; |
| 631 |
} else {
|
| 632 |
int mask = maskTable[rem][2]; |
| 633 |
int b2 = data[idx] & mask;
|
| 634 |
bytee = (b1 << rem) | (b2 >> (8 - rem));
|
| 635 |
read = read + rem; |
| 636 |
rem = 0;
|
| 637 |
} |
| 638 |
} |
| 639 |
if (count > 8) { |
| 640 |
bytes.add(new Integer(bytee)); |
| 641 |
} |
| 642 |
} |
| 643 |
if (bytes.size()>0) { |
| 644 |
byte[] newBytes = new byte[bytes.size()]; |
| 645 |
for (int i=0; i<newBytes.length; i++) { |
| 646 |
newBytes[i] = ((Integer)bytes.get(i)).byteValue();
|
| 647 |
} |
| 648 |
return newBytes;
|
| 649 |
} |
| 650 |
return new Integer(bytee); |
| 651 |
} |
| 652 |
/**
|
| 653 |
* Test a bit obtained from a set of unsigned bytes
|
| 654 |
*
|
| 655 |
* @param data Array of unsigned bytes obtained from the DWG binary file
|
| 656 |
* @param offset The current bit offset where the value begins
|
| 657 |
* @return Vector This vector has two parts. First is an int value that represents
|
| 658 |
* the new offset, and second is a bit flag
|
| 659 |
*/
|
| 660 |
public static Vector testBit(int[] data, int offset) { |
| 661 |
int idx = offset/8; |
| 662 |
int bitidx = offset%8; |
| 663 |
int mask = 0x1 << (7-bitidx); |
| 664 |
boolean val = false; |
| 665 |
if ((data[idx] & mask) > 0) val = true; |
| 666 |
Vector v = new Vector(); |
| 667 |
v.add(new Integer(offset+1)); |
| 668 |
v.add(new Boolean(val)); |
| 669 |
return v;
|
| 670 |
} |
| 671 |
/**
|
| 672 |
* Convert bytes to machine value bytes
|
| 673 |
*
|
| 674 |
* @param data Input of array of bytes
|
| 675 |
* @return int[] Output of array of machine bytes
|
| 676 |
*/
|
| 677 |
public static int[] bytesToMachineBytes(byte[] data) { |
| 678 |
String[] dataString = new String[data.length]; |
| 679 |
int[] dataOut = new int[data.length]; |
| 680 |
for (int i=0; i<data.length; i++) { |
| 681 |
dataString[i] = HexUtil.bytesToHex(new byte[]{data[i]}); |
| 682 |
Integer dataInt = Integer.decode("0x" + dataString[i]); |
| 683 |
dataOut[i] = dataInt.intValue(); |
| 684 |
} |
| 685 |
return dataOut;
|
| 686 |
} |
| 687 |
/**
|
| 688 |
* Obtain the int value of a handle given in binary format
|
| 689 |
*
|
| 690 |
* @param layerHandle Handle in binary format
|
| 691 |
* @return int Int value of the handle
|
| 692 |
*/
|
| 693 |
public static int handleBinToHandleInt(Vector layerHandle) { |
| 694 |
byte[] layerBytes = new byte[]{0,0,0,0}; |
| 695 |
if (layerHandle.size()>2) layerBytes[3] = (byte)((Integer)layerHandle.get(2)).intValue(); |
| 696 |
if (layerHandle.size()>3) { |
| 697 |
layerBytes[3] = (byte)((Integer)layerHandle.get(3)).intValue(); |
| 698 |
layerBytes[2] = (byte)((Integer)layerHandle.get(2)).intValue(); |
| 699 |
} |
| 700 |
if (layerHandle.size()>4) { |
| 701 |
layerBytes[3] = (byte)((Integer)layerHandle.get(4)).intValue(); |
| 702 |
layerBytes[2] = (byte)((Integer)layerHandle.get(3)).intValue(); |
| 703 |
layerBytes[1] = (byte)((Integer)layerHandle.get(2)).intValue(); |
| 704 |
} |
| 705 |
if (layerHandle.size()>5) { |
| 706 |
layerBytes[3] = (byte)((Integer)layerHandle.get(5)).intValue(); |
| 707 |
layerBytes[2] = (byte)((Integer)layerHandle.get(4)).intValue(); |
| 708 |
layerBytes[1] = (byte)((Integer)layerHandle.get(3)).intValue(); |
| 709 |
layerBytes[0] = (byte)((Integer)layerHandle.get(2)).intValue(); |
| 710 |
} |
| 711 |
int layer = ByteUtils.bytesToInt(layerBytes, new int[]{0}); |
| 712 |
return layer;
|
| 713 |
} |
| 714 |
} |