1 files changed, 64 insertions, 0 deletions
diff --git a/third_party/java/proguard/proguard5.3.3/src/proguard/classfile/visitor/ExceptionOffsetFilter.java b/third_party/java/proguard/proguard5.3.3/src/proguard/classfile/visitor/ExceptionOffsetFilter.java
new file mode 100644
index 0000000000..d4865f2560
--- /dev/null
+++ b/third_party/java/proguard/proguard5.3.3/src/proguard/classfile/visitor/ExceptionOffsetFilter.java
@@ -0,0 +1,64 @@
+/*
+ * 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.classfile.visitor;
+
+import proguard.classfile.*;
+import proguard.classfile.attribute.*;
+import proguard.classfile.attribute.visitor.ExceptionInfoVisitor;
+
+/**
+ * This <code>ExceptionInfoVisitor</code> delegates its visits to another given
+ * <code>ExceptionInfoVisitor</code>, but only when the visited exception
+ * covers the instruction at the given offset.
+ *
+ * @author Eric Lafortune
+ */
+public class ExceptionOffsetFilter
+implements   ExceptionInfoVisitor
+{
+    private final int                  instructionOffset;
+    private final ExceptionInfoVisitor exceptionInfoVisitor;
+
+
+    /**
+     * Creates a new ExceptionOffsetFilter.
+     * @param instructionOffset    the instruction offset.
+     * @param exceptionInfoVisitor the ExceptionInfoVisitor to which visits
+     *                             will be delegated.
+     */
+    public ExceptionOffsetFilter(int                  instructionOffset,
+                                 ExceptionInfoVisitor exceptionInfoVisitor)
+    {
+        this.instructionOffset    = instructionOffset;
+        this.exceptionInfoVisitor = exceptionInfoVisitor;
+    }
+
+
+    // Implementations for ExceptionInfoVisitor.
+
+    public void visitExceptionInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo)
+    {
+        if (exceptionInfo.isApplicable(instructionOffset))
+        {
+            exceptionInfoVisitor.visitExceptionInfo(clazz, method, codeAttribute, exceptionInfo);
+        }
+    }
+}