link CPM directory entries

src/com/bytezone/diskbrowser/cpm/CPMDisk.java

@@ -1,6 +1,7 @@
 package com.bytezone.diskbrowser.cpm;
 
 import java.awt.Color;
+import java.util.ArrayList;
 import java.util.List;
 
 import com.bytezone.diskbrowser.applefile.BootSector;
@@ -17,6 +18,7 @@ public class CPMDisk extends AbstractFormattedDisk
   public final SectorType cpmSector = new SectorType ("CPM", Color.lightGray);
 
   private int version;      // http://www.seasip.info/Cpm/format22.html
+  private final List<DirectoryEntry> directoryEntries = new ArrayList<DirectoryEntry> ();
 
   public CPMDisk (Disk disk)
   {
@@ -37,7 +39,24 @@ public class CPMDisk extends AbstractFormattedDisk
     {
       DiskAddress da = disk.getDiskAddress (3, sector);
       sectorTypes[da.getBlock ()] = catalogSector;
+
+      buffer = disk.readSector (da);
+      for (int i = 0; i < buffer.length; i += 32)
+      {
+        if (buffer[i] != 0 && buffer[i] != (byte) 0xE5)
+          break;
+        if (buffer[i] == 0)
+        {
+          DirectoryEntry entry = new DirectoryEntry (buffer, i);
+          DirectoryEntry parent = findParent (entry);
+          if (parent == null)
+            directoryEntries.add (entry);
+          else
+            parent.add (entry);
+        }
+      }
     }
+    listEntries ();
   }
 
   @Override
@@ -46,6 +65,22 @@ public class CPMDisk extends AbstractFormattedDisk
     return null;
   }
 
+  public void listEntries ()
+  {
+    for (DirectoryEntry entry : directoryEntries)
+      System.out.println (entry);
+  }
+
+  private DirectoryEntry findParent (DirectoryEntry child)
+  {
+    for (DirectoryEntry entry : directoryEntries)
+    {
+      if (entry.matches (child))
+        return entry;
+    }
+    return null;
+  }
+
   public static boolean isCorrectFormat (AppleDisk disk)
   {
     disk.setInterleave (3);
@@ -67,10 +102,11 @@ public class CPMDisk extends AbstractFormattedDisk
       buffer = disk.readSector (3, sector);
       for (int i = 0; i < buffer.length; i += 32)
       {
-        if (buffer[i] != 0 && buffer[i] != (byte) 0xE5)
+        int val = buffer[i] & 0xFF;
+        if (val > 31 && val != 0xE5)
           return false;
-        if (buffer[i] == 0)
-          System.out.println (new DirectoryEntry (buffer, i));
+        //        if (buffer[i] == 0)
+        //          System.out.println (new DirectoryEntry (buffer, i));
       }
     }
 

src/com/bytezone/diskbrowser/cpm/DirectoryEntry.java

@@ -1,5 +1,8 @@
 package com.bytezone.diskbrowser.cpm;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import com.bytezone.diskbrowser.utilities.HexFormatter;
 
 public class DirectoryEntry
@@ -12,6 +15,7 @@ public class DirectoryEntry
   private final int s2;
   private final int rc;
   private final byte[] blockList = new byte[16];
+  private final List<DirectoryEntry> entries = new ArrayList<DirectoryEntry> ();
 
   public DirectoryEntry (byte[] buffer, int offset)
   {
@@ -31,6 +35,11 @@ public class DirectoryEntry
         && type.equals (directoryEntry.type);
   }
 
+  public void add (DirectoryEntry entry)
+  {
+    entries.add (entry);
+  }
+
   @Override
   public String toString ()
   {
@@ -48,6 +57,12 @@ public class DirectoryEntry
     String bytes = HexFormatter.getHexString (blockList, 0, 16);
     text.append (String.format ("Allocation ..... %s%n", bytes));
 
+    for (DirectoryEntry entry : entries)
+    {
+      bytes = HexFormatter.getHexString (entry.blockList, 0, 16);
+      text.append (String.format ("                 %s%n", bytes));
+    }
+
     return text.toString ();
   }
 }