1 files changed, 152 insertions, 0 deletions
diff --git a/third_party/java/proguard/proguard5.3.3/src/proguard/shrink/InterfaceUsageMarker.java b/third_party/java/proguard/proguard5.3.3/src/proguard/shrink/InterfaceUsageMarker.java
new file mode 100644
index 0000000000..327d719dd4
--- /dev/null
+++ b/third_party/java/proguard/proguard5.3.3/src/proguard/shrink/InterfaceUsageMarker.java
@@ -0,0 +1,152 @@
+/*
+ * 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.constant.*;
+import proguard.classfile.constant.visitor.ConstantVisitor;
+import proguard.classfile.util.SimplifiedVisitor;
+import proguard.classfile.visitor.ClassVisitor;
+
+
+/**
+ * This ClassVisitor recursively marks all interface
+ * classes that are being used in the visited class.
+ *
+ * @see UsageMarker
+ *
+ * @author Eric Lafortune
+ */
+public class InterfaceUsageMarker
+extends      SimplifiedVisitor
+implements   ClassVisitor,
+             ConstantVisitor
+{
+    private final UsageMarker usageMarker;
+
+    // Fields acting as return parameters for the visitor methods.
+    private boolean used;
+    private boolean anyUsed;
+
+
+    /**
+     * Creates a new InterfaceUsageMarker.
+     * @param usageMarker the usage marker that is used to mark the classes
+     *                    and class members.
+     */
+    public InterfaceUsageMarker(UsageMarker usageMarker)
+    {
+        this.usageMarker = usageMarker;
+    }
+
+
+    // Implementations for ClassVisitor.
+
+    public void visitProgramClass(ProgramClass programClass)
+    {
+        boolean classUsed         = usageMarker.isUsed(programClass);
+        boolean classPossiblyUsed = usageMarker.isPossiblyUsed(programClass);
+
+        if (classUsed || classPossiblyUsed)
+        {
+            // Check if any interfaces are being used.
+            boolean oldAnyUsed = anyUsed;
+            anyUsed = false;
+
+            programClass.interfaceConstantsAccept(this);
+
+            classUsed |= anyUsed;
+            anyUsed = oldAnyUsed;
+
+            // Is this an interface with a preliminary mark?
+            if (classPossiblyUsed)
+            {
+                // Should it be included now?
+                if (classUsed)
+                {
+                    // At least one if this interface's interfaces is being used.
+                    // Mark this interface as well.
+                    usageMarker.markAsUsed(programClass);
+
+                    // Mark this interface's name.
+                    programClass.thisClassConstantAccept(this);
+
+                    // Mark the superclass (java/lang/Object).
+                    programClass.superClassConstantAccept(this);
+                }
+                else
+                {
+                    // Unmark this interface, so we don't bother looking at it again.
+                    usageMarker.markAsUnused(programClass);
+                }
+            }
+        }
+
+        // The return value.
+        used = classUsed;
+    }
+
+
+    public void visitLibraryClass(LibraryClass libraryClass)
+    {
+        // The return values.
+        used    = true;
+        anyUsed = true;
+    }
+
+
+    // Implementations for ConstantVisitor.
+
+    public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
+    {
+        boolean classUsed = usageMarker.isUsed(classConstant);
+
+        if (!classUsed)
+        {
+            // The ClassConstant isn't marked as being used yet. But maybe it
+            // should be included as an interface, so check the actual class.
+            classConstant.referencedClassAccept(this);
+            classUsed = used;
+
+            if (classUsed)
+            {
+                // The class is being used. Mark the ClassConstant as being used
+                // as well.
+                usageMarker.markAsUsed(classConstant);
+
+                clazz.constantPoolEntryAccept(classConstant.u2nameIndex, this);
+            }
+        }
+
+        // The return values.
+        used    =  classUsed;
+        anyUsed |= classUsed;
+    }
+
+
+    public void visitUtf8Constant(Clazz clazz, Utf8Constant utf8Constant)
+    {
+        if (!usageMarker.isUsed(utf8Constant))
+        {
+            usageMarker.markAsUsed(utf8Constant);
+        }
+    }
+}