1 files changed, 128 insertions, 0 deletions
diff --git a/src/proguard/obfuscate/ParameterNameMarker.java b/src/proguard/obfuscate/ParameterNameMarker.java
new file mode 100644
index 0000000..2c3a3db
--- /dev/null
+++ b/src/proguard/obfuscate/ParameterNameMarker.java
@@ -0,0 +1,128 @@
+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2011 Eric Lafortune (eric@graphics.cornell.edu)
+ *
+ * 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
+ */
+package proguard.obfuscate;
+
+import proguard.classfile.*;
+import proguard.classfile.attribute.*;
+import proguard.classfile.attribute.visitor.AttributeVisitor;
+import proguard.classfile.util.*;
+
+/**
+ * This AttributeVisitor trims and marks all local variable (type) table
+ * attributes that it visits. It keeps parameter names and types and removes
+ * the ordinary local variable names and types.
+ *
+ * @author Eric Lafortune
+ */
+public class ParameterNameMarker
+extends      SimplifiedVisitor
+implements   AttributeVisitor
+{
+    private final AttributeVisitor attributeUsageMarker;
+
+
+    /**
+     * Constructs a new ParameterNameMarker.
+     * @param attributeUsageMarker the marker that will be used to mark
+     *                             attributes containing local variable info.
+     */
+    public ParameterNameMarker(AttributeVisitor attributeUsageMarker)
+    {
+        this.attributeUsageMarker = attributeUsageMarker;
+    }
+
+
+    // Implementations for AttributeVisitor.
+
+    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
+
+
+    public void visitLocalVariableTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTableAttribute localVariableTableAttribute)
+    {
+        if (!AttributeUsageMarker.isUsed(localVariableTableAttribute) &&
+            hasParameters(clazz, method))
+        {
+            // Shift the entries that start at offset 0 to the front. 
+            int newIndex = 0;
+            
+            for (int index = 0; index < localVariableTableAttribute.u2localVariableTableLength; index++)
+            {
+                LocalVariableInfo localVariableInfo =
+                    localVariableTableAttribute.localVariableTable[index];
+
+                if (localVariableInfo.u2startPC == 0)
+                {
+                    localVariableTableAttribute.localVariableTable[newIndex++] =
+                        localVariableInfo;
+                }
+            }
+
+            // Trim the table.
+            localVariableTableAttribute.u2localVariableTableLength = newIndex;
+
+            // Mark the table if there are any entries.
+            if (newIndex > 0)
+            {
+                attributeUsageMarker.visitLocalVariableTableAttribute(clazz, method, codeAttribute, localVariableTableAttribute);
+            }
+        }
+    }
+
+
+    public void visitLocalVariableTypeTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeTableAttribute localVariableTypeTableAttribute)
+    {
+        if (!AttributeUsageMarker.isUsed(localVariableTypeTableAttribute) &&
+            hasParameters(clazz, method))
+        {
+            // Shift the entries that start at offset 0 to the front. 
+            int newIndex = 0;
+            
+            for (int index = 0; index < localVariableTypeTableAttribute.u2localVariableTypeTableLength; index++)
+            {
+                LocalVariableTypeInfo localVariableTypeInfo =
+                    localVariableTypeTableAttribute.localVariableTypeTable[index];
+
+                if (localVariableTypeInfo.u2startPC == 0)
+                {
+                    localVariableTypeTableAttribute.localVariableTypeTable[newIndex++] =
+                        localVariableTypeInfo;
+                }
+            }
+
+            // Trim the table.
+            localVariableTypeTableAttribute.u2localVariableTypeTableLength = newIndex;
+            
+            // Mark the table if there are any entries.
+            if (newIndex > 0)
+            {
+                attributeUsageMarker.visitLocalVariableTypeTableAttribute(clazz, method, codeAttribute, localVariableTypeTableAttribute);
+            }
+        }
+    }
+
+
+    // Small utility methods.
+
+    private boolean hasParameters(Clazz clazz, Method method)
+    {
+        return method.getDescriptor(clazz).charAt(1) != ClassConstants.INTERNAL_METHOD_ARGUMENTS_CLOSE;
+    }
+}
+\ No newline at end of file