1 files changed, 174 insertions, 0 deletions
diff --git a/third_party/java/proguard/proguard5.3.3/src/proguard/shrink/InnerUsageMarker.java b/third_party/java/proguard/proguard5.3.3/src/proguard/shrink/InnerUsageMarker.java
new file mode 100644
index 0000000000..d0dd186352
--- /dev/null
+++ b/third_party/java/proguard/proguard5.3.3/src/proguard/shrink/InnerUsageMarker.java
@@ -0,0 +1,174 @@
+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2017 Eric Lafortune @ GuardSquare
+ *
+ * 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.shrink;
+
+import proguard.classfile.*;
+import proguard.classfile.attribute.*;
+import proguard.classfile.attribute.visitor.*;
+import proguard.classfile.constant.*;
+import proguard.classfile.constant.visitor.ConstantVisitor;
+import proguard.classfile.util.SimplifiedVisitor;
+import proguard.classfile.visitor.ClassVisitor;
+
+/**
+ * This AttributeVisitor recursively marks all necessary inner class information
+ * in the attributes that it visits.
+ *
+ * @see UsageMarker
+ *
+ * @author Eric Lafortune
+ */
+public class InnerUsageMarker
+extends      SimplifiedVisitor
+implements   AttributeVisitor,
+             InnerClassesInfoVisitor,
+             ConstantVisitor,
+             ClassVisitor
+{
+    private final UsageMarker usageMarker;
+
+    // Fields acting as a return parameters for several methods.
+    private boolean attributeUsed;
+    private boolean classUsed;
+
+
+    /**
+     * Creates a new InnerUsageMarker.
+     * @param usageMarker the usage marker that is used to mark the classes
+     *                    and class members.
+     */
+    public InnerUsageMarker(UsageMarker usageMarker)
+    {
+        this.usageMarker = usageMarker;
+    }
+
+
+    // Implementations for AttributeVisitor.
+
+    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
+
+
+    public void visitInnerClassesAttribute(Clazz clazz, InnerClassesAttribute innerClassesAttribute)
+    {
+        // Mark the necessary inner classes information.
+        attributeUsed = false;
+        innerClassesAttribute.innerClassEntriesAccept(clazz, this);
+
+        if (attributeUsed)
+        {
+            // We got a positive used flag, so some inner class is being used.
+            // Mark this attribute as being used as well.
+            usageMarker.markAsUsed(innerClassesAttribute);
+
+            markConstant(clazz, innerClassesAttribute.u2attributeNameIndex);
+        }
+    }
+
+
+    // Implementations for InnerClassesInfoVisitor.
+
+    public void visitInnerClassesInfo(Clazz clazz, InnerClassesInfo innerClassesInfo)
+    {
+        boolean innerClassesInfoUsed = usageMarker.isUsed(innerClassesInfo);
+
+        if (!innerClassesInfoUsed)
+        {
+            // Check if the inner class (if any) is marked as being used.
+            classUsed = true;
+            innerClassesInfo.innerClassConstantAccept(clazz, this);
+            innerClassesInfoUsed = classUsed;
+
+            // Check if the outer class (if any) is marked as being used.
+            classUsed = true;
+            innerClassesInfo.outerClassConstantAccept(clazz, this);
+            innerClassesInfoUsed &= classUsed;
+
+            // If both the inner class and the outer class are marked as being
+            // used, then mark this InnerClassesInfo as well.
+            if (innerClassesInfoUsed)
+            {
+                usageMarker.markAsUsed(innerClassesInfo);
+
+                innerClassesInfo.innerNameConstantAccept(clazz, this);
+            }
+        }
+
+        // The return value.
+        attributeUsed |= innerClassesInfoUsed;
+    }
+
+
+    // Implementations for ConstantVisitor.
+
+    public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
+    {
+        classUsed = usageMarker.isUsed(classConstant);
+
+        // Is the class constant marked as being used?
+        if (!classUsed)
+        {
+            // Check the referenced class.
+            classUsed = true;
+            classConstant.referencedClassAccept(this);
+
+            // Is the referenced class marked as being used?
+            if (classUsed)
+            {
+                // Mark the class constant and its Utf8 constant.
+                usageMarker.markAsUsed(classConstant);
+
+                markConstant(clazz, classConstant.u2nameIndex);
+            }
+        }
+    }
+
+
+    public void visitUtf8Constant(Clazz clazz, Utf8Constant utf8Constant)
+    {
+        usageMarker.markAsUsed(utf8Constant);
+    }
+
+
+    // Implementations for ClassVisitor.
+
+    public void visitProgramClass(ProgramClass programClass)
+    {
+        classUsed = usageMarker.isUsed(programClass);
+    }
+
+
+    public void visitLibraryClass(LibraryClass libraryClass)
+    {
+        classUsed = true;
+    }
+
+
+    // Small utility methods.
+
+    /**
+     * Marks the given constant pool entry of the given class. This includes
+     * visiting any other referenced constant pool entries.
+     */
+    private void markConstant(Clazz clazz, int index)
+    {
+         clazz.constantPoolEntryAccept(index, this);
+    }
+}