svn commit: r774279 [2/2] - in /incubator/kato/trunk/org.apache.kato.tools.plugins.hexeditor: ./ .settings/ META-INF/ bin/ icons/ src/ src/org/ src/org/apache/ src/org/apache/kato/ src/org/apache/kato/tools/ src/org/apache/kato/tools/plugins/ src/org/a...

[sp...@apache.org]

Added: incubator/kato/trunk/org.apache.kato.tools.plugins.hexeditor/src/org/apache/kato/tools/plugins/hexeditor/views/RawByteModel.java
URL: http://svn.apache.org/viewvc/incubator/kato/trunk/org.apache.kato.tools.plugins.hexeditor/src/org/apache/kato/tools/plugins/hexeditor/views/RawByteModel.java?rev=774279&view=auto
==============================================================================
--- incubator/kato/trunk/org.apache.kato.tools.plugins.hexeditor/src/org/apache/kato/tools/plugins/hexeditor/views/RawByteModel.java (added)
+++ incubator/kato/trunk/org.apache.kato.tools.plugins.hexeditor/src/org/apache/kato/tools/plugins/hexeditor/views/RawByteModel.java Wed May 13 10:20:54 2009
@@ -0,0 +1,136 @@
+/*******************************************************************************
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ******************************************************************************/
+package org.apache.kato.tools.plugins.hexeditor.views;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+import javax.imageio.stream.FileImageInputStream;
+
+import org.apache.kato.tools.plugins.hexeditor.eyecatchers.Eyecatcher;
+import org.apache.kato.tools.plugins.hexeditor.eyecatchers.EyecatcherScanner;
+import org.eclipse.jface.viewers.IStructuredContentProvider;
+import org.eclipse.jface.viewers.Viewer;
+
+//this is the model for the view i.e. the raw dump file
+public class RawByteModel implements IStructuredContentProvider {
+	private FileImageInputStream file = null;
+	private long ptrFile = 0;			//current seek pointer
+	private final int pageSize = 40 * 16;		//number of items to display on a page
+	private byte[] buffer = new byte[pageSize];	//byte buffer
+	private int bufferSize = 0;
+	private EyecatcherScanner scanner = new EyecatcherScanner();
+	
+	public RawByteModel(String path) {
+		try {
+			file = new FileImageInputStream(new RandomAccessFile(path, "r"));
+			readIntoBuffer(0);
+		} catch (FileNotFoundException e) {
+			throw new IllegalArgumentException("The file " + path + " does not exist or could not be found");
+		}
+	}
+
+	public long getOffset() {
+		return ptrFile;		//the offset into the file
+	}
+
+	//accepts either an ASCII or hex identified string
+	public long findData(String searchFor) {
+		String hex = null;
+		if (searchFor.startsWith("0x")) {
+			hex = searchFor.substring(2);			//strip the 0x prefix
+		} else {
+			StringBuffer buffer = new StringBuffer(searchFor.length() * 2);		//correctly intialise the buffer size
+			for(int i = 0; i < searchFor.length(); i++) {
+				buffer.append(Integer.toHexString(0xFF & searchFor.charAt(i)));
+			}
+			hex = buffer.toString();
+		}
+		scanner.reset();				//reset the scanner
+		long mark = ptrFile;			//note where we are in case we don't find the data we're looking for
+		readIntoBuffer(0);				//start searching from the beginning of the data
+		int bufferDiscardCount = 0;		//count how many times we discard the current buffer contents searching for a match
+		while(!isEOF()) {
+			if (scanner.scan(buffer, hex)) {	//found the search terms
+				long index = (bufferDiscardCount * bufferSize); // +  scanner.getEyecatcher().getLocation();		//position in file
+				readIntoBuffer(index);		//ensure that the buffer contains a complete display page to avoid overwriting the eyecatcher
+				return index;
+			}
+			bufferDiscardCount++;
+			readIntoBuffer(bufferDiscardCount * bufferSize);	//carry on reading from the current point
+		}
+		readIntoBuffer(mark);			//restore where we were
+		return -1;		//no match has been found
+	}
+	
+	public byte getData(long index) {
+		if((index < ptrFile) || ((ptrFile + bufferSize) <= index)) {		//currently have required index in buffer
+			readIntoBuffer(index);
+			scanner.reset();		//if we are reading a new buffer, then invalidate the scanner
+		}
+		return buffer[(int)(index - ptrFile)];
+	}
+	
+	public boolean isInRange(long index) {
+		return (!isEOF()) && (index < file.length());
+	}
+	
+	public boolean isEOF() {
+		return (bufferSize == -1);
+	}
+	
+	private void readIntoBuffer(long index) {
+		if (isEOF() || (index >= file.length())) {
+			throw new IllegalStateException("Cannot read beyond the end of a file");
+		}
+		try {
+			ptrFile = index;
+			file.seek(index);
+			bufferSize = file.read(buffer);
+		} catch (IOException e) {
+			throw new RuntimeException("Could not read data", e);
+		}
+		
+	}
+	
+	public Object[] getElements(Object arg0) {
+		return null;
+	}
+
+	public void dispose() {
+		try {
+			file.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+	public void inputChanged(Viewer arg0, Object arg1, Object arg2) {
+		// TODO Auto-generated method stub
+
+	}
+
+	public boolean hasEyeCatcher(Eyecatcher searchfor) {
+		return false;
+	}
+	
+	public boolean hasEyeCatcher() {
+		return scanner.hasEyecatcher();
+	}
+	
+	public Eyecatcher getEyecatcher() {
+		return scanner.getEyecatcher();
+	}
+}

Propchange: incubator/kato/trunk/org.apache.kato.tools.plugins.hexeditor/src/org/apache/kato/tools/plugins/hexeditor/views/RawByteModel.java
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