1 files changed, 75 insertions, 0 deletions
diff --git a/third_party/java/proguard/proguard5.3.3/src/proguard/optimize/evaluation/SimpleEnumClassChecker.java b/third_party/java/proguard/proguard5.3.3/src/proguard/optimize/evaluation/SimpleEnumClassChecker.java
new file mode 100644
index 0000000000..9208402d9e
--- /dev/null
+++ b/third_party/java/proguard/proguard5.3.3/src/proguard/optimize/evaluation/SimpleEnumClassChecker.java
@@ -0,0 +1,75 @@
+/*
+ * 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.optimize.evaluation;
+
+import proguard.classfile.*;
+import proguard.classfile.visitor.*;
+import proguard.optimize.info.SimpleEnumMarker;
+
+/**
+ * This ClassVisitor marks all program classes that it visits as simple enums,
+ * if their methods qualify.
+ *
+ * @author Eric Lafortune
+ */
+public class SimpleEnumClassChecker
+implements   ClassVisitor
+{
+    //*
+    private static final boolean DEBUG = false;
+    /*/
+    private static       boolean DEBUG = System.getProperty("enum") != null;
+    //*/
+
+
+    private final SimpleEnumMarker simpleEnumMarker     = new SimpleEnumMarker(true);
+    private final MemberVisitor    virtualMemberChecker = new MemberAccessFilter(0,
+                                                                                 ClassConstants.ACC_PRIVATE |
+                                                                                 ClassConstants.ACC_STATIC,
+                                                          new MemberToClassVisitor(
+                                                          new SimpleEnumMarker(false)));
+
+
+    // Implementations for ClassVisitor.
+
+    public void visitLibraryClass(LibraryClass libraryClass) {}
+
+    public void visitProgramClass(ProgramClass programClass)
+    {
+        // Does the class have the simple enum constructor?
+        if (programClass.findMethod(ClassConstants.METHOD_NAME_INIT,
+                                    ClassConstants.METHOD_TYPE_INIT_ENUM) != null)
+        {
+            if (DEBUG)
+            {
+                System.out.println("SimpleEnumClassChecker: ["+programClass.getName()+"] is a candidate simple enum, without extra fields");
+            }
+
+            // Mark it.
+            simpleEnumMarker.visitProgramClass(programClass);
+
+            // However, unmark it again if it has any non-private, non-static
+            // fields or methods.
+            programClass.fieldsAccept(virtualMemberChecker);
+            programClass.methodsAccept(virtualMemberChecker);
+        }
+    }
+}