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/*
* Licensed Materials - Property of IBM,
* WebSphere Studio Workbench
* (c) Copyright IBM Corp 2000, 2001
*/
package org.eclipse.compare.internal;
import java.io.*;
import java.lang.reflect.InvocationTargetException;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.*;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.compare.*;
import org.eclipse.compare.structuremergeviewer.ICompareInput;
/**
* A simple compare viewer for binary files.
* Shows the position of the first non-matching byte.
*/
public class BinaryCompareViewer extends AbstractViewer {
private static final int EOF= -1;
private Text fControl;
private ICompareInput fInput;
public BinaryCompareViewer(Composite parent, CompareConfiguration cc) {
fControl= new Text(parent, SWT.NONE);
fControl.setEditable(false);
fControl.setData(CompareUI.COMPARE_VIEWER_TITLE, "Binary Compare");
}
public Control getControl() {
return fControl;
}
public void setInput(Object input) {
if (fControl != null && input instanceof ICompareInput) {
fInput= (ICompareInput) input;
InputStream left= null;
InputStream right= null;
try {
left= getStream(fInput.getLeft());
right= getStream(fInput.getRight());
int pos= 0;
while (true) {
int l= left.read();
int r= right.read();
if (l != r) {
fControl.setText("first bytes differ at position " + pos);
break;
}
if (l == EOF)
break;
pos++;
}
} catch (CoreException ex) {
fControl.setText("CoreException " + ex);
} catch (IOException ex) {
fControl.setText("IOException " + ex);
} finally {
if (left != null) {
try {
left.close();
} catch (IOException ex) {
}
}
if (right != null) {
try {
right.close();
} catch (IOException ex) {
}
}
}
}
}
public Object getInput() {
return fInput;
}
private InputStream getStream(ITypedElement input) throws CoreException {
if (input instanceof IStreamContentAccessor)
return ((IStreamContentAccessor)input).getContents();
return new ByteArrayInputStream(new byte[0]);
}
}
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