svn-gvsig-desktop / branches / v2_0_0_prep / libraries / libDwg / src / org / gvsig / dwg / lib / DwgUtil.java @ 28969
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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 org.gvsig.dwg.lib; |
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import java.nio.ByteBuffer; |
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import java.nio.ByteOrder; |
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import java.util.ArrayList; |
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import java.util.List; |
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import org.gvsig.dwg.lib.util.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 RuntimeException 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 ArrayList This ArrayList 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 ArrayList readExtendedData(int[] data, int offset) throws RuntimeException { |
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int bitPos = offset;
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ArrayList extData = new ArrayList(); |
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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)((ArrayList)getHandle(data, bitPos)).get(0)).intValue(); |
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// TODO: Esto no es correcto. Repasar ...
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int handle = ((Integer)((ArrayList)getHandle(data, bitPos)).get(1)).intValue(); |
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bitPos = newBitPos; |
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ArrayList eedata = new ArrayList(); |
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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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ArrayList chars = new ArrayList(); |
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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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ArrayList chars = new ArrayList(); |
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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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ArrayList chars = new ArrayList(); |
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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)((ArrayList)getRawDouble(data, bitPos)).get(0)).intValue(); |
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double d1 = ((Double)((ArrayList)getRawDouble(data, bitPos)).get(1)).doubleValue(); |
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bitPos = newBitPos; |
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newBitPos = ((Integer)((ArrayList)getRawDouble(data, bitPos)).get(0)).intValue(); |
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double d2 = ((Double)((ArrayList)getRawDouble(data, bitPos)).get(1)).doubleValue(); |
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bitPos = newBitPos; |
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newBitPos = ((Integer)((ArrayList)getRawDouble(data, bitPos)).get(0)).intValue(); |
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double d3 = ((Double)((ArrayList)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)((ArrayList)getRawDouble(data, bitPos)).get(0)).intValue(); |
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double d = ((Double)((ArrayList)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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ArrayList v = new ArrayList(); |
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// v.add(handle, eedata);
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extData.add(v); |
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} |
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ArrayList v = new ArrayList(); |
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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 RuntimeException 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 ArrayList This ArrayList 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 ArrayList getDefaultDouble(int[] data, int offset, double defVal) throws RuntimeException { |
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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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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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ArrayList v = new ArrayList(); |
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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 RuntimeException 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 ArrayList This ArrayList 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 ArrayList getBitDouble(int[] data, int offset) throws RuntimeException { |
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ArrayList v = new ArrayList(); |
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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 " + 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 RuntimeException 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 ArrayList This ArrayList 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 ArrayList getRawDouble(int[] data, int offset) throws RuntimeException { |
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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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ArrayList v = new ArrayList(); |
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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 RuntimeException 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 ArrayList This ArrayList 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 ArrayList getBitShort(int[] data, int offset) throws RuntimeException { |
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ArrayList v = new ArrayList(); |
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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 RuntimeException 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 ArrayList This ArrayList 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 ArrayList getRawShort(int[] data, int offset) throws RuntimeException { |
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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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ArrayList v = new ArrayList(); |
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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 RuntimeException 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 ArrayList This ArrayList 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 ArrayList getBitLong(int[] data, int offset) throws RuntimeException { |
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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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ArrayList v = new ArrayList(); |
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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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/**
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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 RuntimeException 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 ArrayList This ArrayList 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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* @throws RuntimeException
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*/
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public static ArrayList getRawLong(int[] data, int offset) throws RuntimeException { |
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ArrayList v = new ArrayList(); |
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// _val = struct.unpack('<l', _long)[0]
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byte[] bytes = (byte[]) getBits(data, 32, 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.getInt();
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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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/**
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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 RuntimeException 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 ArrayList This ArrayList 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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*/
|
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public static ArrayList getRawChar(int[] data, int offset) throws RuntimeException { |
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int charr = ((Integer) getBits(data, 8, offset)).intValue(); |
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ArrayList v = new ArrayList(); |
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v.add(new Integer(offset + 8)); |
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v.add(new Integer(charr)); |
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return v;
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} |
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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
|
448 |
* @param offset The current bit offset where the value begins
|
449 |
* @throws RuntimeException 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 ArrayList This ArrayList has two parts. First is an int value that represents
|
452 |
* the new offset, and second is the char value
|
453 |
*/
|
454 |
public static ArrayList getModularChar(int[] data, int offset) throws RuntimeException { |
455 |
int val = 0; |
456 |
ArrayList bytes = new ArrayList(); |
457 |
boolean read = true; |
458 |
int offsett = offset;
|
459 |
int fac = 1; |
460 |
while (read) {
|
461 |
int bytee = ((Integer) getBits(data, 8, offsett)).intValue(); |
462 |
offsett = offsett + 8;
|
463 |
if ((bytee & 0x80) == 0) { |
464 |
read = false;
|
465 |
if ((bytee & 0x40) > 0) { |
466 |
fac = -1;
|
467 |
bytee = bytee & 0xbf;
|
468 |
} |
469 |
} |
470 |
bytes.add(new Integer(bytee & 0x7f)); |
471 |
} |
472 |
if (bytes.size()==1) val = ((Integer)bytes.get(0)).intValue(); |
473 |
else if (bytes.size()==2) val = ((Integer)bytes.get(0)).intValue() | (((Integer)bytes.get(1)).intValue() << 7); |
474 |
else if (bytes.size()==3) val = ((Integer)bytes.get(0)).intValue() | (((Integer)bytes.get(1)).intValue() << 7) | (((Integer)bytes.get(2)).intValue() << 14); |
475 |
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); |
476 |
else System.out.println("Unexpected byte array length: " + bytes.size()); |
477 |
ArrayList v = new ArrayList(); |
478 |
v.add(new Integer(offsett)); |
479 |
v.add(new Integer(fac * val)); |
480 |
return v;
|
481 |
} |
482 |
|
483 |
/**
|
484 |
* Read a String from a group of unsigned bytes
|
485 |
*
|
486 |
* @param data Array of unsigned bytes obtained from the DWG binary file
|
487 |
* @param offset The current bit offset where the value begins
|
488 |
* @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs
|
489 |
* when we are looking for LwPolylines.
|
490 |
* @return ArrayList This ArrayList has two parts. First is an int value that represents
|
491 |
* the new offset, and second is the String
|
492 |
*/
|
493 |
public static ArrayList getTextString(int[] data, int offset) throws RuntimeException { |
494 |
int bitPos = offset;
|
495 |
ArrayList bitShort = DwgUtil.getBitShort(data, bitPos);
|
496 |
int newBitPos = ((Integer) bitShort.get(0)).intValue(); |
497 |
int len = ((Integer) bitShort.get(1)).intValue(); |
498 |
bitPos = newBitPos; |
499 |
int bitLen = len * 8; |
500 |
Object cosa = DwgUtil.getBits(data, bitLen, bitPos);
|
501 |
String string;
|
502 |
if (cosa instanceof byte[]) { |
503 |
string = new String((byte[]) cosa); |
504 |
} else {
|
505 |
// string = ((Integer)cosa).toString();
|
506 |
byte[] bytes = new byte[] { ((Integer) cosa).byteValue() }; |
507 |
string = new String((byte[]) bytes); |
508 |
} |
509 |
bitPos = bitPos + bitLen; |
510 |
ArrayList v = new ArrayList(); |
511 |
v.add(new Integer(bitPos)); |
512 |
v.add(string); |
513 |
return v;
|
514 |
} |
515 |
|
516 |
/**
|
517 |
* Read a CmColor from a group of unsigned bytes
|
518 |
*
|
519 |
* @param data
|
520 |
* Array of unsigned bytes obtained from the DWG binary file
|
521 |
* @param offset
|
522 |
* The current bit offset where the value begins
|
523 |
* @throws RuntimeException
|
524 |
* If an unexpected bit value is found in the DWG file. Occurs
|
525 |
* when we are looking for LwPolylines.
|
526 |
* @return ArrayList This ArrayList has two parts. First is an int value
|
527 |
* that represents the new offset, and second is the int value
|
528 |
* (handle of a DWG object)
|
529 |
*/
|
530 |
public static ArrayList getCmColor(int[] intData, int offset, String version) throws RuntimeException { |
531 |
|
532 |
ArrayList v = new ArrayList(); |
533 |
int bitPos = offset;
|
534 |
List val = getBitShort(intData, bitPos);
|
535 |
bitPos = ((Integer) val.get(0)).intValue(); |
536 |
v.add((Integer) val.get(1)); //color index |
537 |
|
538 |
//FIXME: para versiones superiores habrá que ampliar la condición
|
539 |
if (version.equalsIgnoreCase("Autocad R2004, R2005, R2006")){ |
540 |
|
541 |
val = getBitLong(intData, bitPos); |
542 |
bitPos = ((Integer) val.get(0)).intValue(); |
543 |
v.add((Integer) val.get(1)); //RGB value |
544 |
|
545 |
val = getRawChar(intData, bitPos); |
546 |
bitPos = ((Integer) val.get(0)).intValue(); |
547 |
Integer colorByte = ((Integer) val.get(1)); //.intValue(); |
548 |
v.add(colorByte); //Color Byte
|
549 |
|
550 |
// Según la documentacion:
|
551 |
// Color Byte & 1 ==> color name follows
|
552 |
// Color Byte & 2 ==> book name follows
|
553 |
if (((colorByte.intValue() & 0x01) != 0) || ((colorByte.intValue() & 0x02) != 0)) { |
554 |
val = getTextString(intData, bitPos); |
555 |
bitPos = ((Integer) val.get(0)).intValue(); |
556 |
v.add(val.get(1));//color name or book name |
557 |
} else {
|
558 |
v.add("");//color name or book name |
559 |
} |
560 |
} |
561 |
|
562 |
v.add(0, new Integer(bitPos)); |
563 |
return v;
|
564 |
} |
565 |
|
566 |
/**
|
567 |
* Read a int value (the handle of a DWG object) from a group of unsigned
|
568 |
* bytes
|
569 |
*
|
570 |
* @param data
|
571 |
* Array of unsigned bytes obtained from the DWG binary file
|
572 |
* @param offset
|
573 |
* The current bit offset where the value begins
|
574 |
* @throws RuntimeException
|
575 |
* If an unexpected bit value is found in the DWG file. Occurs
|
576 |
* when we are looking for LwPolylines.
|
577 |
* @return ArrayList This ArrayList has two parts. First is an int value
|
578 |
* that represents the new offset, and second is the int value
|
579 |
* (handle of a DWG object)
|
580 |
*/
|
581 |
public static ArrayList getHandle(int[] data, int offset) |
582 |
throws RuntimeException { |
583 |
ArrayList v = new ArrayList(); |
584 |
int code = ((Integer) DwgUtil.getBits(data, 4, offset)).intValue(); |
585 |
int counter = ((Integer)DwgUtil.getBits(data, 4, (offset + 4))).intValue(); |
586 |
int read = 8; |
587 |
ArrayList hlist = new ArrayList(); |
588 |
if (counter > 0) { |
589 |
int hlen = counter * 8; |
590 |
Object handle = DwgUtil.getBits(data, hlen, (offset + 8)); |
591 |
read = read + hlen; |
592 |
if (hlen > 8) { |
593 |
byte[] handleBytes = (byte[]) handle; |
594 |
int[] handleInts = new int[handleBytes.length]; |
595 |
// Hacerlos unsigned ...
|
596 |
for (int i = 0; i < handleBytes.length; i++) { |
597 |
handleInts[i] = ByteUtils.getUnsigned(handleBytes[i]); |
598 |
} |
599 |
for (int i = 0; i < handleInts.length; i++) { |
600 |
hlist.add(new Integer(handleInts[i])); |
601 |
} |
602 |
} else {
|
603 |
hlist.add(handle); |
604 |
} |
605 |
} |
606 |
v.add(new Integer(offset + read)); |
607 |
v.add(new Integer(code)); |
608 |
v.add(new Integer(counter)); |
609 |
for (int i = 0; i < hlist.size(); i++) { |
610 |
v.add(hlist.get(i)); |
611 |
} |
612 |
return v;
|
613 |
} |
614 |
|
615 |
/**
|
616 |
* Read a int value (the size of a modular short) from a ByteBuffer
|
617 |
*
|
618 |
* @param bb Data given as a ByteBuffer
|
619 |
* @return int Size of the modular short
|
620 |
*/
|
621 |
public static int getModularShort(ByteBuffer bb) { |
622 |
ArrayList shorts = new ArrayList(); |
623 |
bb.order(ByteOrder.BIG_ENDIAN);
|
624 |
short shortt = bb.getShort();
|
625 |
int size = 0; |
626 |
while ((shortt & 0x80) > 0) { |
627 |
shorts.add(new Short(shortt)); |
628 |
shortt = bb.getShort(); |
629 |
} |
630 |
shorts.add(new Short(shortt)); |
631 |
for (int i = 0; i < shorts.size(); i++) { |
632 |
shortt = ((Short) shorts.get(i)).shortValue();
|
633 |
shorts.set(i, new Integer(((shortt & 0xff00) >> 8) | ((shortt & 0xff) << 8))); |
634 |
} |
635 |
int slen = shorts.size();
|
636 |
if (slen == 1) { |
637 |
size = (((Integer)shorts.get(0)).intValue()) & 0x7fff;//(new Integer(((Integer)shorts.get(0)).shortValue() & 0x7fff)).byteValue(); |
638 |
} else if (slen == 2) { |
639 |
int tmp = ((Integer) shorts.get(0)).intValue(); |
640 |
shorts.set(0, shorts.get(1)); |
641 |
shorts.set(1, new Integer(tmp)); |
642 |
size = (((((Integer)shorts.get(0)).intValue()) & 0x7fff) << 15) | (((((Integer)shorts.get(1)).intValue()) & 0x7fff));//(new Integer(((Integer)shorts.get(0)).shortValue() & 0x7fff)).byteValue(); |
643 |
} else {
|
644 |
System.out.println("Unexpected array length: " + slen); |
645 |
} |
646 |
return size;
|
647 |
} |
648 |
|
649 |
/**
|
650 |
* Returns a set of bits from a group of unsigned bytes
|
651 |
*
|
652 |
* @param data Array of unsigned bytes obtained from the DWG binary file
|
653 |
* @param count Bit counter
|
654 |
* @param offset The current bit offset where the value begins
|
655 |
* @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs
|
656 |
* when we are looking for LwPolylines.
|
657 |
* @return This method returns an array of bytes or an int value
|
658 |
*/
|
659 |
public static Object getBits(int[] data, int count, int offset) throws RuntimeException { |
660 |
int idx = offset / 8; |
661 |
int bitidx = offset % 8; |
662 |
/**
|
663 |
* mask1: bit mask to apply to the current byte
|
664 |
* lshift: left shift amount of mask results
|
665 |
* mask2: bit mask to apply to the next byte
|
666 |
* rshift: right shift amount of the mask results
|
667 |
*/
|
668 |
int[][] maskTable = new int[][]{ |
669 |
{0xff, 0, 0x00, 0}, // bit offset == 0 |
670 |
{ 0x7f, 1, 0x80, 7 }, // bit offset == 1 |
671 |
{ 0x3f, 2, 0xc0, 6 }, // bit offset == 2 |
672 |
{ 0x1f, 3, 0xe0, 5 }, // bit offset == 3 |
673 |
{ 0x0f, 4, 0xf0, 4 }, // bit offset == 4 |
674 |
{ 0x07, 5, 0xf8, 3 }, // bit offset == 5 |
675 |
{ 0x03, 6, 0xfc, 2 }, // bit offset == 6 |
676 |
{ 0x01, 7, 0xfe, 1 }, // bit offset == 7 |
677 |
}; |
678 |
int mask1 = maskTable[bitidx][0]; |
679 |
int lsh = maskTable[bitidx][1]; |
680 |
int mask2 = maskTable[bitidx][2]; |
681 |
int rsh = maskTable[bitidx][3]; |
682 |
int binc = 8 - bitidx; |
683 |
int read = 0; |
684 |
int rem = count;
|
685 |
int bytee = 0x0; |
686 |
ArrayList bytes = new ArrayList(); |
687 |
while (read < count) {
|
688 |
int b1 = 0; |
689 |
if (rem > binc) {
|
690 |
b1 = (data[idx] & mask1); |
691 |
read = read + binc; |
692 |
rem = rem - binc; |
693 |
} else {
|
694 |
b1 = ((data[idx] & mask1) >> (8 - bitidx - rem));
|
695 |
bytee = b1; |
696 |
read = read + rem; |
697 |
rem = 0;
|
698 |
} |
699 |
if (read < count) {
|
700 |
idx = idx + 1;
|
701 |
if (rem > bitidx) {
|
702 |
int b2 = (data[idx] & mask2);
|
703 |
bytee = (b1 << lsh) | (b2 >> rsh); |
704 |
read = read + bitidx; |
705 |
rem = rem - bitidx; |
706 |
} else {
|
707 |
int mask = maskTable[rem][2]; |
708 |
int b2 = data[idx] & mask;
|
709 |
bytee = (b1 << rem) | (b2 >> (8 - rem));
|
710 |
read = read + rem; |
711 |
rem = 0;
|
712 |
} |
713 |
} |
714 |
if (count > 8) { |
715 |
bytes.add(new Integer(bytee)); |
716 |
} |
717 |
} |
718 |
if (bytes.size() > 0) { |
719 |
byte[] newBytes = new byte[bytes.size()]; |
720 |
for (int i = 0; i < newBytes.length; i++) { |
721 |
newBytes[i] = ((Integer) bytes.get(i)).byteValue();
|
722 |
} |
723 |
return newBytes;
|
724 |
} |
725 |
return new Integer(bytee); |
726 |
} |
727 |
|
728 |
/**
|
729 |
* Test a bit obtained from a set of unsigned bytes
|
730 |
*
|
731 |
* @param data Array of unsigned bytes obtained from the DWG binary file
|
732 |
* @param offset The current bit offset where the value begins
|
733 |
* @return ArrayList This ArrayList has two parts. First is an int value that represents
|
734 |
* the new offset, and second is a bit flag
|
735 |
*/
|
736 |
public static ArrayList testBit(int[] data, int offset) { |
737 |
int idx = offset / 8; |
738 |
int bitidx = offset % 8; |
739 |
int mask = 0x1 << (7 - bitidx); |
740 |
boolean val = false; |
741 |
if ((data[idx] & mask) > 0) val = true; |
742 |
ArrayList v = new ArrayList(); |
743 |
v.add(new Integer(offset + 1)); |
744 |
v.add(new Boolean(val)); |
745 |
return v;
|
746 |
} |
747 |
|
748 |
/**
|
749 |
* Convert bytes to machine value bytes
|
750 |
*
|
751 |
* @param data Input of array of bytes
|
752 |
* @return int[] Output of array of machine bytes
|
753 |
*/
|
754 |
public static int[] bytesToMachineBytes(byte[] data) { |
755 |
String[] dataString = new String[data.length]; |
756 |
int[] dataOut = new int[data.length]; |
757 |
for (int i = 0; i < data.length; i++) { |
758 |
dataString[i] = HexUtil.bytesToHex(new byte[] { data[i] }); |
759 |
Integer dataInt = Integer.decode("0x" + dataString[i]); |
760 |
dataOut[i] = dataInt.intValue(); |
761 |
} |
762 |
return dataOut;
|
763 |
} |
764 |
|
765 |
/**
|
766 |
* It receives the list procedent from getHandle method, and return the
|
767 |
* handle as int
|
768 |
*
|
769 |
* */
|
770 |
public static int handleToInt(List fromGetHandle) { |
771 |
|
772 |
int[] handle = new int[fromGetHandle.size() - 1]; |
773 |
for (int j = 1; j < fromGetHandle.size(); j++) { |
774 |
handle[j - 1] = ((Integer) fromGetHandle.get(j)).intValue(); |
775 |
} |
776 |
ArrayList handleVect = new ArrayList(); |
777 |
for (int i = 0; i < handle.length; i++) { |
778 |
handleVect.add(new Integer(handle[i])); |
779 |
} |
780 |
return DwgUtil.handleBinToHandleInt(handleVect);
|
781 |
|
782 |
|
783 |
} |
784 |
/**
|
785 |
* Obtain the int value of a handle given in binary format
|
786 |
*
|
787 |
* @param layerHandle Handle in binary format
|
788 |
* @return int Int value of the handle
|
789 |
*/
|
790 |
public static int handleBinToHandleInt(ArrayList layerHandle) { |
791 |
byte[] layerBytes = new byte[] { 0, 0, 0, 0 }; |
792 |
if (layerHandle.size()>2) layerBytes[3] = (byte)((Integer)layerHandle.get(2)).intValue(); |
793 |
if (layerHandle.size() > 3) { |
794 |
layerBytes[3] = (byte) ((Integer) layerHandle.get(3)).intValue(); |
795 |
layerBytes[2] = (byte) ((Integer) layerHandle.get(2)).intValue(); |
796 |
} |
797 |
if (layerHandle.size() > 4) { |
798 |
layerBytes[3] = (byte) ((Integer) layerHandle.get(4)).intValue(); |
799 |
layerBytes[2] = (byte) ((Integer) layerHandle.get(3)).intValue(); |
800 |
layerBytes[1] = (byte) ((Integer) layerHandle.get(2)).intValue(); |
801 |
} |
802 |
if (layerHandle.size() > 5) { |
803 |
layerBytes[3] = (byte) ((Integer) layerHandle.get(5)).intValue(); |
804 |
layerBytes[2] = (byte) ((Integer) layerHandle.get(4)).intValue(); |
805 |
layerBytes[1] = (byte) ((Integer) layerHandle.get(3)).intValue(); |
806 |
layerBytes[0] = (byte) ((Integer) layerHandle.get(2)).intValue(); |
807 |
} |
808 |
int layer = ByteUtils.bytesToInt(layerBytes, new int[] { 0 }); |
809 |
return layer;
|
810 |
} |
811 |
|
812 |
/*
|
813 |
* TODO Ver si esto es necesario
|
814 |
* */
|
815 |
public static int[] toIntArray(byte[] bytes) { |
816 |
String[] dataMachValString = new String[bytes.length]; |
817 |
int[] data = new int[bytes.length]; |
818 |
for (int i = 0; i < bytes.length; i++) { |
819 |
dataMachValString[i] = HexUtil.bytesToHex(new byte[] { bytes[i] }); |
820 |
Integer dataMachValShort = Integer.decode("0x" + dataMachValString[i]); |
821 |
data[i] = dataMachValShort.byteValue(); |
822 |
data[i] = ByteUtils.getUnsigned((byte) data[i]);
|
823 |
}// for
|
824 |
return data;
|
825 |
|
826 |
} |
827 |
} |