1 files changed, 90 insertions, 0 deletions
diff --git a/dexgen/src/com/android/dexgen/dex/code/LocalEnd.java b/dexgen/src/com/android/dexgen/dex/code/LocalEnd.java
new file mode 100644
index 0000000..130b08b
--- /dev/null
+++ b/dexgen/src/com/android/dexgen/dex/code/LocalEnd.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * 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 com.android.dexgen.dex.code;
+
+import com.android.dexgen.rop.code.RegisterSpec;
+import com.android.dexgen.rop.code.RegisterSpecList;
+import com.android.dexgen.rop.code.SourcePosition;
+
+/**
+ * Pseudo-instruction which is used to explicitly end the mapping of a
+ * register to a named local variable. That is, an instance of this
+ * class in an instruction stream indicates that starting with the
+ * subsequent instruction, the indicated variable is no longer valid.
+ */
+public final class LocalEnd extends ZeroSizeInsn {
+    /**
+     * {@code non-null;} register spec representing the local variable ended
+     * by this instance. <b>Note:</b> Technically, only the register
+     * number needs to be recorded here as the rest of the information
+     * is implicit in the ambient local variable state, but other code
+     * will check the other info for consistency.
+     */
+    private final RegisterSpec local;
+
+    /**
+     * Constructs an instance. The output address of this instance is initially
+     * unknown ({@code -1}).
+     *
+     * @param position {@code non-null;} source position
+     * @param local {@code non-null;} register spec representing the local
+     * variable introduced by this instance
+     */
+    public LocalEnd(SourcePosition position, RegisterSpec local) {
+        super(position);
+
+        if (local == null) {
+            throw new NullPointerException("local == null");
+        }
+
+        this.local = local;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public DalvInsn withRegisterOffset(int delta) {
+        return new LocalEnd(getPosition(), local.withOffset(delta));
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public DalvInsn withRegisters(RegisterSpecList registers) {
+        return new LocalEnd(getPosition(), local);
+    }
+
+    /**
+     * Gets the register spec representing the local variable ended
+     * by this instance.
+     *
+     * @return {@code non-null;} the register spec
+     */
+    public RegisterSpec getLocal() {
+        return local;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    protected String argString() {
+        return local.toString();
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    protected String listingString0(boolean noteIndices) {
+        return "local-end " + LocalStart.localString(local);
+    }
+}