add unpack("i")

Author: fglock

src/main/java/org/perlonjava/operators/Unpack.java

@@ -20,11 +20,14 @@ public class Unpack {
 
     static {
         // Initialize format handlers
+        handlers.put('c', new CFormatHandler());
         handlers.put('C', new CFormatHandler());
         handlers.put('S', new NumericFormatHandler.ShortHandler(false));
         handlers.put('s', new NumericFormatHandler.ShortHandler(true));
         handlers.put('L', new NumericFormatHandler.LongHandler(false));
         handlers.put('l', new NumericFormatHandler.LongHandler(true));
+        handlers.put('i', new NumericFormatHandler.LongHandler(true));
+        handlers.put('I', new NumericFormatHandler.LongHandler(true));
         handlers.put('N', new NumericFormatHandler.NetworkLongHandler());
         handlers.put('n', new NumericFormatHandler.NetworkShortHandler());
         handlers.put('V', new NumericFormatHandler.VAXLongHandler());
@@ -40,6 +43,7 @@ public class Unpack {
         handlers.put('h', new HexStringFormatHandler('h'));
         handlers.put('H', new HexStringFormatHandler('H'));
         handlers.put('W', new WFormatHandler());
+        handlers.put('x', new XFormatHandler());
         // Note: U handler is created dynamically based on startsWithU
     }
 

src/main/java/org/perlonjava/operators/unpack/XFormatHandler.java

@@ -0,0 +1,29 @@
+package org.perlonjava.operators.unpack;
+
+import org.perlonjava.operators.UnpackState;
+import org.perlonjava.runtime.RuntimeBase;
+import org.perlonjava.runtime.RuntimeScalar;
+
+import java.nio.ByteBuffer;
+import java.util.List;
+
+/**
+ * Handles 'x' format - byte zero.
+ */
+public class XFormatHandler implements FormatHandler {
+    @Override
+    public void unpack(UnpackState state, List<RuntimeBase> output, int count, boolean isStarCount) {
+        for (int i = 0; i < count; i++) {
+            if (state.isCharacterMode()) {
+                output.add(new RuntimeScalar("\0"));
+            } else {
+                output.add(new RuntimeScalar("\0"));
+            }
+        }
+    }
+
+    @Override
+    public int getFormatSize() {
+        return 1;
+    }
+}