262 lines
7.7 KiB
Java
262 lines
7.7 KiB
Java
/*******************************************************************************
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* Copyright (c) 2015-2021 MINRES Technologies GmbH and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* MINRES Technologies GmbH - initial API and implementation
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*******************************************************************************/
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package com.minres.scviewer.database.vcd;
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import java.beans.PropertyChangeListener;
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import java.beans.PropertyChangeSupport;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.ArrayDeque;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.List;
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import java.util.NavigableMap;
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import java.util.TreeMap;
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import java.util.Vector;
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import java.util.zip.GZIPInputStream;
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import com.google.common.collect.Iterables;
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import com.minres.scviewer.database.BitVector;
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import com.minres.scviewer.database.DoubleVal;
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import com.minres.scviewer.database.IEvent;
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import com.minres.scviewer.database.IWaveform;
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import com.minres.scviewer.database.IWaveformDb;
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import com.minres.scviewer.database.IWaveformDbLoader;
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import com.minres.scviewer.database.InputFormatException;
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import com.minres.scviewer.database.RelationType;
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/**
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* The Class VCDDb.
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*/
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public class VCDDbLoader implements IWaveformDbLoader, IVCDDatabaseBuilder {
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/** The Constant TIME_RES. */
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private static final Long TIME_RES = 1000L; // ps
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/** The module stack. */
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private ArrayDeque<String> moduleStack;
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/** The signals. */
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private List<IWaveform> signals;
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/** The max time. */
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private long maxTime;
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/** The pcs. */
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protected PropertyChangeSupport pcs = new PropertyChangeSupport(this);
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private static boolean isGzipped(File f) {
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try (InputStream is = new FileInputStream(f)) {
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byte [] signature = new byte[2];
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int nread = is.read( signature ); //read the gzip signature
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return nread == 2 && signature[ 0 ] == (byte) 0x1f && signature[ 1 ] == (byte) 0x8b;
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}
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catch (IOException e) {
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return false;
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}
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}
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/**
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* Can load.
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*
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* @param inputFile the input file
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* @return true, if successful
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*/
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@Override
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public boolean canLoad(File inputFile) {
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if(!inputFile.isDirectory() || inputFile.exists()) {
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String name = inputFile.getName();
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if(!(name.endsWith(".vcd") ||
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name.endsWith(".vcdz") ||
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name.endsWith(".vcdgz") ||
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name.endsWith(".vcd.gz")) )
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return false;
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boolean gzipped = isGzipped(inputFile);
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try(InputStream stream = gzipped ? new GZIPInputStream(new FileInputStream(inputFile)) : new FileInputStream(inputFile)){
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byte[] buffer = new byte[8];
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if (stream.read(buffer, 0, buffer.length) == buffer.length) {
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return buffer[0]=='$';
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}
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} catch (Exception e) {
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return false;
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}
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}
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return false;
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}
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/* (non-Javadoc)
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* @see com.minres.scviewer.database.ITrDb#load(java.io.File)
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*/
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@SuppressWarnings("unchecked")
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@Override
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public void load(IWaveformDb db, File file) throws InputFormatException {
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dispose();
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this.maxTime=0;
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boolean res = false;
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try {
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signals = new Vector<>();
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moduleStack= new ArrayDeque<>();
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FileInputStream fis = new FileInputStream(file);
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res = new VCDFileParser(false).load(isGzipped(file)?new GZIPInputStream(fis):fis, this);
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moduleStack=null;
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} catch(IOException e) {
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moduleStack=null;
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throw new InputFormatException(e.toString());
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}
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if(!res) throw new InputFormatException("Could not parse VCD file");
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// calculate max time of this database
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for(IWaveform waveform:signals) {
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NavigableMap<Long, IEvent[]> events =waveform.getEvents();
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if(!events.isEmpty())
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maxTime= Math.max(maxTime, events.lastKey());
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}
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// extend signals to have a last value set at max time
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for(IWaveform s:signals){
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if(s instanceof VCDSignal<?>) {
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TreeMap<Long,?> events = (TreeMap<Long, ?>) ((VCDSignal<?>)s).getEvents();
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if(events.size()>0 && events.lastKey()<maxTime){
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Object val = events.lastEntry().getValue();
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if(val instanceof BitVector) {
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((VCDSignal<BitVector>)s).addSignalChange(maxTime, (BitVector) val);
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} else if(val instanceof DoubleVal)
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((VCDSignal<DoubleVal>)s).addSignalChange(maxTime, (DoubleVal) val);
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}
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}
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}
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pcs.firePropertyChange(IWaveformDbLoader.LOADING_FINISHED, null, null);
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}
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public void dispose() {
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moduleStack=null;
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signals=null;
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}
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/* (non-Javadoc)
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* @see com.minres.scviewer.database.ITrDb#getMaxTime()
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*/
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@Override
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public Long getMaxTime() {
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return maxTime;
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}
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/* (non-Javadoc)
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* @see com.minres.scviewer.database.ITrDb#getAllWaves()
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*/
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@Override
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public Collection<IWaveform> getAllWaves() {
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return signals;
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}
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/* (non-Javadoc)
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* @see com.minres.scviewer.database.vcd.ITraceBuilder#enterModule(java.lang.String)
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*/
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@Override
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public void enterModule(String tokenString) {
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if(moduleStack.isEmpty()) {
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if("SystemC".compareTo(tokenString)!=0) moduleStack.push(tokenString);
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} else
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moduleStack.push(moduleStack.peek()+"."+tokenString);
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}
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/* (non-Javadoc)
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* @see com.minres.scviewer.database.vcd.ITraceBuilder#exitModule()
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*/
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@Override
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public void exitModule() {
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if(!moduleStack.isEmpty()) moduleStack.pop();
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}
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/* (non-Javadoc)
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* @see com.minres.scviewer.database.vcd.ITraceBuilder#newNet(java.lang.String, int, int)
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*/
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@SuppressWarnings("unchecked")
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@Override
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public Integer newNet(String name, int i, int width) {
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String netName = moduleStack.isEmpty()? name: moduleStack.peek()+"."+name;
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int id = signals.size();
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if(width==0) {
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signals.add( i<0 ? new VCDSignal<DoubleVal>(id, netName, width) :
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new VCDSignal<DoubleVal>((VCDSignal<DoubleVal>)signals.get(i), id, netName));
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} else if(width>0){
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signals.add( i<0 ? new VCDSignal<BitVector>(id, netName, width) :
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new VCDSignal<BitVector>((VCDSignal<BitVector>)signals.get(i), id, netName));
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}
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pcs.firePropertyChange(IWaveformDbLoader.SIGNAL_ADDED, null, Iterables.getLast(signals));
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return id;
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}
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/* (non-Javadoc)
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* @see com.minres.scviewer.database.vcd.ITraceBuilder#getNetWidth(int)
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*/
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@Override
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public int getNetWidth(int intValue) {
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VCDSignal<?> signal = (VCDSignal<?>) signals.get(intValue);
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return signal.getRowCount();
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}
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/* (non-Javadoc)
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* @see com.minres.scviewer.database.vcd.ITraceBuilder#appendTransition(int, long, com.minres.scviewer.database.vcd.BitVector)
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*/
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@SuppressWarnings("unchecked")
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@Override
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public void appendTransition(int signalId, long currentTime, BitVector value) {
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VCDSignal<BitVector> signal = (VCDSignal<BitVector>) signals.get(signalId);
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Long time = currentTime* TIME_RES;
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signal.addSignalChange(time, value);
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}
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/* (non-Javadoc)
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* @see com.minres.scviewer.database.vcd.ITraceBuilder#appendTransition(int, long, com.minres.scviewer.database.vcd.BitVector)
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*/
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@SuppressWarnings("unchecked")
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@Override
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public void appendTransition(int signalId, long currentTime, double value) {
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VCDSignal<DoubleVal> signal = (VCDSignal<DoubleVal>) signals.get(signalId);
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Long time = currentTime* TIME_RES;
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signal.addSignalChange(time, new DoubleVal(value));
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}
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/* (non-Javadoc)
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* @see com.minres.scviewer.database.IWaveformDbLoader#getAllRelationTypes()
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*/
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@Override
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public Collection<RelationType> getAllRelationTypes(){
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return Collections.emptyList();
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}
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/**
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* Adds the property change listener.
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*
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* @param l the l
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*/
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@Override
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public void addPropertyChangeListener(PropertyChangeListener l) {
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pcs.addPropertyChangeListener(l);
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}
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/**
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* Removes the property change listener.
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*
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* @param l the l
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*/
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@Override
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public void removePropertyChangeListener(PropertyChangeListener l) {
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pcs.removePropertyChangeListener(l);
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}
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}
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