[patch] Fix bugs of memory window

[Zhao Shujing <pearly dot zhao at oracle dot com>]

Hi,

This patch is to fix bug #4617 and other bugs of memory window.
- Fixed bug converting to bin and hex when memory value is negative
number.
- Fixed bug to get octal number by convert from hex.
- Setting the font to fixed-width font "monospace 10"
- Adding leading zero for all of bin, oct and hex.
- Adding prefix zero to octal number.

Any suggestions are welcomed

Pearly

Index: MemoryWindow.java
===================================================================
RCS file: /cvs/frysk/frysk-gui/frysk/gui/memory/MemoryWindow.java,v
retrieving revision 1.44
diff -u -r1.44 MemoryWindow.java
--- MemoryWindow.java	28 Aug 2007 06:05:19 -0000	1.44
+++ MemoryWindow.java	30 Aug 2007 03:35:59 -0000
@@ -53,6 +53,7 @@
 import org.gnu.gtk.Button;
 import org.gnu.gtk.CellRenderer;
 import org.gnu.gtk.CellRendererText;
+import org.gnu.pango.FontDescription;
 import org.gnu.gtk.DataColumn;
 import org.gnu.gtk.DataColumnDouble;
 import org.gnu.gtk.DataColumnObject;
@@ -325,6 +326,8 @@
     this.bitsCombo.setActive(currentFormat + 1);
 
     this.memoryView = (TreeView) this.glade.getWidget("memoryView");
+    FontDescription fontDesc = new FontDescription("monospace 10");
+    memoryView.setFont(fontDesc);
 
     this.bitsCombo.showAll();
     this.diss = new Disassembler(myTask.getMemory());
@@ -652,10 +655,16 @@
           {
             for (int i = 0; i < b.length; i++)
               {
-                bin = bin + Integer.toBinaryString(b[i] & 0xff);
-                oct = oct + Integer.toOctalString(b[i] & 0xff);
+                String str = Integer.toBinaryString(b[i] & 0xff);
+                while (str.length() < 8)
+                    str = "0"+str;
+                bin = bin + str;
                 hex = hex + Integer.toHexString(b[i] & 0xff);
+                if ((b[i] & 0xff)==0)
+                    hex = hex + "0";
               }
+            BigInteger bihex = new BigInteger(hex, 16);
+            oct = bihex.toString(8);
           }
         else
           {
@@ -668,10 +677,24 @@
         int diff = bin.length() % BYTE_BITS;
         if (diff != 0)
           bin = padBytes(bin, false, diff);
+        int length = (int)Math.pow(2, currentFormat + 3);
+            
+        while (bin.length() < length)
+        {
+            bin = "0" + bin;            
+        }
+        while (oct.length() < (length/3 + 1))
+        {
+            oct = "0" + oct;
+        }      
+        while (hex.length() < length/4 )
+        {
+            hex = "0" + hex;
+        }            
 
         /* Little endian first */
         this.model.setValue(iter, (DataColumnString) cols[1], bin);
-        this.model.setValue(iter, (DataColumnString) cols[3], oct);
+        this.model.setValue(iter, (DataColumnString) cols[3], "0"+oct);
         this.model.setValue(iter, (DataColumnString) cols[5], dec);
         this.model.setValue(iter, (DataColumnString) cols[7], "0x" + hex);
 
@@ -687,9 +710,21 @@
           dec = bi.toString(10);
         else
           dec = bii.toString(10);
-
+        
+        while (bin2.length() < length)
+        {
+            bin2 = "0" + bin2;            
+        }
+        while (oct.length() < (length/3 + 1))
+        {
+            oct = "0" + oct;
+        }      
+        while (hex.length() < length/4 )
+        {
+            hex = "0" + hex;
+        }
         this.model.setValue(iter, (DataColumnString) cols[2], bin2);
-        this.model.setValue(iter, (DataColumnString) cols[4], oct);
+        this.model.setValue(iter, (DataColumnString) cols[4], "0"+oct);
         this.model.setValue(iter, (DataColumnString) cols[6], dec);
         this.model.setValue(iter, (DataColumnString) cols[8], "0x" + hex);