Update

src/yetmorecode/file/BinaryFileInputStream.java

@@ -0,0 +1,101 @@
+package yetmorecode.file;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+public class BinaryFileInputStream extends FileInputStream {
+
+	private ByteOrder byteOrder = ByteOrder.LITTLE_ENDIAN;
+
+	public BinaryFileInputStream(String name) throws FileNotFoundException {
+		super(name);
+	}
+
+	public BinaryFileInputStream(String name, ByteOrder order) throws FileNotFoundException {
+		super(name);
+		byteOrder = order;
+	}
+
+	public BinaryFileInputStream(File file) throws FileNotFoundException {
+		super(file);
+	}
+
+	public BinaryFileInputStream(File file, ByteOrder order) throws FileNotFoundException {
+		this(file);
+		byteOrder = order;
+	}
+
+	public int readByte(long offset) throws IOException {
+		var old = position(offset);
+		int ret = readByte();
+		position(old);
+		return ret;
+	}
+
+	public int readByte() throws IOException {
+		return read();
+	}
+
+	public short readShort(long offset) throws IOException {
+		var old = position(offset);
+		var i = readShort();
+		position(old);
+		return i;
+	}
+
+	public short readShort() throws IOException  {
+		byte[] bytes = readNBytes(2);
+		ByteBuffer bb = ByteBuffer.wrap(bytes);
+		bb.order(byteOrder);
+		return bb.getShort();
+	}
+
+	public int readInt(long offset) throws IOException {
+		var old = position(offset);
+		var i = readInt();
+		position(old);
+		return i;
+	}
+
+	public int readInt() throws IOException  {
+		byte[] bytes = readNBytes(4);
+		ByteBuffer bb = ByteBuffer.wrap(bytes);
+		bb.order(byteOrder);
+		return bb.getInt();
+	}
+
+	public float readFloat(long offset) throws IOException {
+		var old = position(offset);
+		var i = readFloat();
+		position(old);
+		return i;
+	}
+
+	public float readFloat() throws IOException  {
+		byte[] bytes = readNBytes(4);
+		ByteBuffer bb = ByteBuffer.wrap(bytes);
+		bb.order(byteOrder);
+		return bb.getFloat();
+	}
+
+	public String readString(long offset, int size) throws IOException {
+		var old = position(offset);
+		var i = readString(size);
+		position(old);
+		return i;
+	}
+
+	public String readString(int size) throws IOException {
+		return new String(readNBytes(size));
+	}
+
+	public long position(long offset) throws IOException {
+		var old = getChannel().position();
+		getChannel().position(offset);
+		return old;
+	}
+}

src/yetmorecode/file/BinaryFileOutputStream.java

@@ -0,0 +1,12 @@
+package yetmorecode.file;
+
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+
+public class BinaryFileOutputStream extends FileOutputStream {
+
+	public BinaryFileOutputStream(String name) throws FileNotFoundException {
+		super(name);
+	}
+
+}

src/yetmorecode/format/exception/InvalidHeaderException.java → src/yetmorecode/file/exception/InvalidHeaderException.java

@@ -1,4 +1,4 @@
-package yetmorecode.format.exception;
+package yetmorecode.file.exception;
 
 /**
  * An exception class to handle encountering

src/yetmorecode/format/lx/LeObjectPageTableEntry.java → src/yetmorecode/file/format/lx/LeObjectPageTableEntry.java

@@ -1,4 +1,4 @@
-package yetmorecode.format.lx;
+package yetmorecode.file.format.lx;
 
 /**
  * The Object page table provides information about a logical page in an object. 

src/yetmorecode/format/lx/LxExecutable.java → src/yetmorecode/file/format/lx/LxExecutable.java

@@ -1,8 +1,8 @@
-package yetmorecode.format.lx;
+package yetmorecode.file.format.lx;
 
 import java.util.ArrayList;
 
-import yetmorecode.format.mz.MzHeader;
+import yetmorecode.file.format.mz.MzHeader;
 
 public class LxExecutable {
 	/**

src/yetmorecode/format/lx/LxFixupRecord.java → src/yetmorecode/file/format/lx/LxFixupRecord.java

@@ -1,4 +1,4 @@
-package yetmorecode.format.lx;
+package yetmorecode.file.format.lx;
 
 import java.util.ArrayList;
 

src/yetmorecode/format/lx/LxHeader.java → src/yetmorecode/file/format/lx/LxHeader.java

@@ -1,4 +1,4 @@
-package yetmorecode.format.lx;
+package yetmorecode.file.format.lx;
 
 /**
  * LX/LE/LC executable module header

src/yetmorecode/format/lx/LxObjectPageTableEntry.java → src/yetmorecode/file/format/lx/LxObjectPageTableEntry.java

@@ -1,4 +1,4 @@
-package yetmorecode.format.lx;
+package yetmorecode.file.format.lx;
 
 /**
  * The Object page table provides information about a logical page in an object. 

src/yetmorecode/format/lx/ObjectPageTableEntry.java → src/yetmorecode/file/format/lx/ObjectPageTableEntry.java

@@ -1,4 +1,4 @@
-package yetmorecode.format.lx;
+package yetmorecode.file.format.lx;
 
 public interface ObjectPageTableEntry {
 	public int getOffset();

src/yetmorecode/format/lx/ObjectTableEntry.java → src/yetmorecode/file/format/lx/ObjectTableEntry.java

@@ -1,4 +1,4 @@
-package yetmorecode.format.lx;
+package yetmorecode.file.format.lx;
 
 /**
  * LX Executable Object Table Entry<br>

src/yetmorecode/format/mz/MzExecutable.java → src/yetmorecode/file/format/mz/MzExecutable.java

@@ -1,4 +1,4 @@
-package yetmorecode.format.mz;
+package yetmorecode.file.format.mz;
 
 import java.util.ArrayList;
 

src/yetmorecode/format/mz/MzHeader.java → src/yetmorecode/file/format/mz/MzHeader.java

@@ -1,4 +1,8 @@
-package yetmorecode.format.mz;
+package yetmorecode.file.format.mz;
+
+import java.io.IOException;
+
+import yetmorecode.file.BinaryFileInputStream;
 
 /**
  * MS-DOS MZ header<br>
@@ -148,4 +152,30 @@ public class MzHeader {
      * DOS-stub bytes
      */
 	public byte [] stubBytes;
+
+	public static MzHeader fromStream(BinaryFileInputStream input, long offset) throws IOException {
+		var header = new MzHeader();
+		var old = input.position(offset);
+		header.signature = input.readShort();
+		header.bytesOnLastBlock = input.readShort();
+		header.blockCount = input.readShort();
+		header.relocations = input.readShort();
+		header.headerSize = input.readShort();
+		header.minExtraParagraphs = input.readShort();
+		header.maxExtraParagraphs = input.readShort();
+		header.ss = input.readShort();
+		header.sp = input.readShort();
+		header.checksum = input.readShort();
+		header.ip = input.readShort();
+		header.cs = input.readShort();
+		header.relocationTableOffset = input.readShort();
+		header.overlayNumber = input.readShort();
+		input.skip(8);
+		header.oemId = input.readShort();
+		header.oemInfo = input.readShort();
+		input.skip(20);
+		header.fileAddressNewExe = input.readInt();
+		input.position(old);
+		return header;
+	}
 }

src/yetmorecode/format/mz/MzRelocationEntry.java → src/yetmorecode/file/format/mz/MzRelocationEntry.java

@@ -1,4 +1,4 @@
-package yetmorecode.format.mz;
+package yetmorecode.file.format.mz;
 
 
 /**