Add a utility class for some higher-level functions

src/com/webcodepro/shrinkit/Utilities.java

@@ -0,0 +1,75 @@
+package com.webcodepro.shrinkit;
+
+/*
+ * Copyright (C) 2012 by David Schmidt
+ * david__schmidt at users.sourceforge.net
+ *
+ * This program is free software; you can redistribute it and/or modify it 
+ * under the terms of the GNU General Public License as published by the 
+ * Free Software Foundation; either version 2 of the License, or (at your 
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along 
+ * with this program; if not, write to the Free Software Foundation, Inc., 
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import com.webcodepro.shrinkit.io.LittleEndianByteInputStream;
+
+/**
+ * Some higher-level utilities for dealing with a NuFX archive.
+ * 
+ * @author david__schmidt@users.sourceforge.net
+ */
+public class Utilities
+{
+	/**
+	 * Interpret a SDK NuFile/NuFX/Shrinkit archive as a full disk image.
+	 *
+	 * @return byte[] buffer containing full disk of data; null if unable to read
+	 * @throws IllegalArgumentException if the filename is not able to be read
+	 * @throws IOException the file has some malformed-ness about it
+	 */
+	public static byte[] unpackSDKFile(String fileName) throws IOException {
+		byte buffer[] = null;
+		ThreadRecord dataThread = null;
+		File file = new File(fileName);
+		if (file.isDirectory()) {
+			throw new IllegalArgumentException("'" + fileName + "' is not a file.");
+		}
+		InputStream is = new FileInputStream(file);
+		NuFileArchive a = new NuFileArchive(is);
+		for (HeaderBlock b : a.getHeaderBlocks()) {
+			for (ThreadRecord r : b.getThreadRecords()) {
+				try
+				{
+					if (r.getThreadKind() == ThreadKind.DISK_IMAGE)
+					{
+						dataThread = r;
+					}
+				}
+				catch (Exception ex)
+				{
+					System.out.println(ex);
+				}
+			}
+			dataThread.readThreadData(new LittleEndianByteInputStream(dataThread.getRawInputStream()));
+			InputStream fis = dataThread.getInputStream();
+			int dmgLen = (int)(dataThread.getThreadEof());
+			buffer = new byte[dmgLen];
+			fis.read(buffer,0,dmgLen);
+			fis.close();
+		}
+		return buffer;
+	}
+}