1 files changed, 93 insertions, 0 deletions
diff --git a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/util/ListStack.java b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/util/ListStack.java
new file mode 100644
index 000000000000..19c2416c44de
--- /dev/null
+++ b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/util/ListStack.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jetbrains.java.decompiler.util;
+
+import java.util.ArrayList;
+
+public class ListStack<T> extends ArrayList<T> {
+
+  protected int pointer = 0;
+
+  public ListStack() {
+    super();
+  }
+
+  public ListStack(ArrayList<T> list) {
+    super(list);
+  }
+
+  public ListStack<T> clone() {
+    ListStack<T> newstack = new ListStack<T>(this);
+    newstack.pointer = this.pointer;
+    return newstack;
+  }
+
+  public T push(T item) {
+    this.add(item);
+    pointer++;
+    return item;
+  }
+
+  public T pop() {
+    pointer--;
+    T o = this.get(pointer);
+    this.remove(pointer);
+    return o;
+  }
+
+  public T pop(int count) {
+    T o = null;
+    for (int i = count; i > 0; i--) {
+      o = this.pop();
+    }
+    return o;
+  }
+
+  public void remove() {
+    pointer--;
+    this.remove(pointer);
+  }
+
+  public void removeMultiple(int count) {
+    while (count > 0) {
+      pointer--;
+      this.remove(pointer);
+      count--;
+    }
+  }
+
+  public boolean empty() {
+    return (pointer == 0);
+  }
+
+  public int getPointer() {
+    return pointer;
+  }
+
+  public T getByOffset(int offset) {
+    return this.get(pointer + offset);
+  }
+
+  public void insertByOffset(int offset, T item) {
+    this.add(pointer + offset, item);
+    pointer++;
+  }
+
+  public void clear() {
+    super.clear();
+    pointer = 0;
+  }
+}