1 files changed, 54 insertions, 0 deletions
diff --git a/src/proguard/classfile/editor/StackSizeUpdater.java b/src/proguard/classfile/editor/StackSizeUpdater.java
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+++ b/src/proguard/classfile/editor/StackSizeUpdater.java
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+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2009 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.classfile.editor;
+
+import proguard.classfile.*;
+import proguard.classfile.attribute.*;
+import proguard.classfile.attribute.visitor.*;
+import proguard.classfile.util.SimplifiedVisitor;
+
+/**
+ * This AttributeVisitor computes and updates the maximum stack size of the
+ * code attributes that it visits.
+ *
+ * @author Eric Lafortune
+ */
+public class StackSizeUpdater
+extends      SimplifiedVisitor
+implements   AttributeVisitor
+{
+    private final StackSizeComputer stackSizeComputer = new StackSizeComputer();
+
+
+    // Implementations for AttributeVisitor.
+
+    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
+
+
+    public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
+    {
+        // Compute the stack sizes.
+        stackSizeComputer.visitCodeAttribute(clazz, method, codeAttribute);
+
+        // Update the maximum stack size.
+        codeAttribute.u2maxStack = stackSizeComputer.getMaxStackSize();
+    }
+}