1 files changed, 116 insertions, 0 deletions
diff --git a/dx/src/com/android/dx/rop/cst/CstInteger.java b/dx/src/com/android/dx/rop/cst/CstInteger.java
new file mode 100644
index 0000000..3691fc0
--- /dev/null
+++ b/dx/src/com/android/dx/rop/cst/CstInteger.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2007 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.dx.rop.cst;
+
+import com.android.dx.rop.type.Type;
+import com.android.dx.util.Hex;
+
+/**
+ * Constants of type {@code CONSTANT_Integer_info}.
+ */
+public final class CstInteger
+        extends CstLiteral32 {
+    /** {@code non-null;} array of cached instances */
+    private static final CstInteger[] cache = new CstInteger[511];
+
+    /** {@code non-null;} instance representing {@code -1} */
+    public static final CstInteger VALUE_M1 = make(-1);
+
+    /** {@code non-null;} instance representing {@code 0} */
+    public static final CstInteger VALUE_0 = make(0);
+
+    /** {@code non-null;} instance representing {@code 1} */
+    public static final CstInteger VALUE_1 = make(1);
+
+    /** {@code non-null;} instance representing {@code 2} */
+    public static final CstInteger VALUE_2 = make(2);
+
+    /** {@code non-null;} instance representing {@code 3} */
+    public static final CstInteger VALUE_3 = make(3);
+
+    /** {@code non-null;} instance representing {@code 4} */
+    public static final CstInteger VALUE_4 = make(4);
+
+    /** {@code non-null;} instance representing {@code 5} */
+    public static final CstInteger VALUE_5 = make(5);
+
+    /**
+     * Makes an instance for the given value. This may (but does not
+     * necessarily) return an already-allocated instance.
+     *
+     * @param value the {@code int} value
+     * @return {@code non-null;} the appropriate instance
+     */
+    public static CstInteger make(int value) {
+        /*
+         * Note: No need to synchronize, since we don't make any sort
+         * of guarantee about ==, and it's okay to overwrite existing
+         * entries too.
+         */
+        int idx = (value & 0x7fffffff) % cache.length;
+        CstInteger obj = cache[idx];
+
+        if ((obj != null) && (obj.getValue() == value)) {
+            return obj;
+        }
+
+        obj = new CstInteger(value);
+        cache[idx] = obj;
+        return obj;
+    }
+
+    /**
+     * Constructs an instance. This constructor is private; use {@link #make}.
+     *
+     * @param value the {@code int} value
+     */
+    private CstInteger(int value) {
+        super(value);
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public String toString() {
+        int value = getIntBits();
+        return "int{0x" + Hex.u4(value) + " / " + value + '}';
+    }
+
+    /** {@inheritDoc} */
+    public Type getType() {
+        return Type.INT;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public String typeName() {
+        return "int";
+    }
+
+    /** {@inheritDoc} */
+    public String toHuman() {
+        return Integer.toString(getIntBits());
+    }
+
+    /**
+     * Gets the {@code int} value.
+     *
+     * @return the value
+     */
+    public int getValue() {
+        return getIntBits();
+    }
+}