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allow multiple loading of same format

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This commit is contained in:
Eyck Jentzsch
2021-11-15 10:52:59 +01:00
parent aef1e29a53
commit 076611eec7
9 changed files with 208 additions and 18 deletions
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6
plugins/com.minres.scviewer.database.vcd/OSGI-INF/component.xml
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@@ -1,7 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?>
<scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0" name="VCDDbLoader">
<implementation class="com.minres.scviewer.database.vcd.VCDDbLoader"/>
<scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0" name="VCDDbLoaderFactory">
<implementation class="com.minres.scviewer.database.vcd.VCDDbLoaderFactory"/>
<service>
<provide interface="com.minres.scviewer.database.IWaveformDbLoader"/>
<provide interface="com.minres.scviewer.database.IWaveformDbLoaderFactory"/>
</service>
</scr:component>

3
plugins/com.minres.scviewer.database.vcd/src/com/minres/scviewer/database/vcd/VCDDbLoader.java
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@@ -164,7 +164,8 @@ public class VCDDbLoader implements IWaveformDbLoader, IVCDDatabaseBuilder {
@Override
public void enterModule(String tokenString) {
if(moduleStack.isEmpty()) {
if("SystemC".compareTo(tokenString)!=0) moduleStack.push(tokenString);
if("SystemC".compareTo(tokenString)!=0)
moduleStack.push(tokenString);
} else
moduleStack.push(moduleStack.peek()+"."+tokenString);

77
plugins/com.minres.scviewer.database.vcd/src/com/minres/scviewer/database/vcd/VCDDbLoaderFactory.java Normal file
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@@ -0,0 +1,77 @@
/*******************************************************************************
* Copyright (c) 2015-2021 MINRES Technologies GmbH and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* MINRES Technologies GmbH - initial API and implementation
*******************************************************************************/
package com.minres.scviewer.database.vcd;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;
import com.minres.scviewer.database.IWaveformDbLoader;
import com.minres.scviewer.database.IWaveformDbLoaderFactory;
/**
* The Class VCDDb.
*/
public class VCDDbLoaderFactory implements IWaveformDbLoaderFactory {
/**
* Checks if is gzipped.
*
* @param f the f
* @return true, if is gzipped
*/
private static boolean isGzipped(File f) {
try (InputStream is = new FileInputStream(f)) {
byte [] signature = new byte[2];
int nread = is.read( signature ); //read the gzip signature
return nread == 2 && signature[ 0 ] == (byte) 0x1f && signature[ 1 ] == (byte) 0x8b;
}
catch (IOException e) {
return false;
}
}
/**
* Can load.
*
* @param inputFile the input file
* @return true, if successful
*/
@Override
public boolean canLoad(File inputFile) {
if(!inputFile.isDirectory() || inputFile.exists()) {
String name = inputFile.getName();
if(!(name.endsWith(".vcd") ||
name.endsWith(".vcdz") ||
name.endsWith(".vcdgz") ||
name.endsWith(".vcd.gz")) )
return false;
boolean gzipped = isGzipped(inputFile);
try(InputStream stream = gzipped ? new GZIPInputStream(new FileInputStream(inputFile)) : new FileInputStream(inputFile)){
byte[] buffer = new byte[8];
if (stream.read(buffer, 0, buffer.length) == buffer.length) {
return buffer[0]=='$';
}
} catch (Exception e) {
return false;
}
}
return false;
}
@Override
public IWaveformDbLoader getLoader() {
return new VCDDbLoader();
}
}