Add several classes from dx tool to the dexgen project

[android-x86/dalvik.git] / dexgen / src / com / android / dexgen / rop / cst / CstShort.java

diff --git a/dexgen/src/com/android/dexgen/rop/cst/CstShort.java b/dexgen/src/com/android/dexgen/rop/cst/CstShort.java
new file mode 100644 (file)
index 0000000..c81a589
--- /dev/null
+++ b/dexgen/src/com/android/dexgen/rop/cst/CstShort.java
@@ -0,0 +1,100 @@
+/*
+ * 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.dexgen.rop.cst;
+
+import com.android.dexgen.rop.type.Type;
+import com.android.dexgen.util.Hex;
+
+/**
+ * Constants of type {@code short}.
+ */
+public final class CstShort
+        extends CstLiteral32 {
+    /** {@code non-null;} the value {@code 0} as an instance of this class */
+    public static final CstShort VALUE_0 = make((short) 0);
+
+    /**
+     * Makes an instance for the given value. This may (but does not
+     * necessarily) return an already-allocated instance.
+     *
+     * @param value the {@code short} value
+     * @return {@code non-null;} the appropriate instance
+     */
+    public static CstShort make(short value) {
+        return new CstShort(value);
+    }
+
+    /**
+     * Makes an instance for the given {@code int} value. This
+     * may (but does not necessarily) return an already-allocated
+     * instance.
+     *
+     * @param value the value, which must be in range for a {@code short}
+     * @return {@code non-null;} the appropriate instance
+     */
+    public static CstShort make(int value) {
+        short cast = (short) value;
+
+        if (cast != value) {
+            throw new IllegalArgumentException("bogus short value: " +
+                    value);
+        }
+
+        return make(cast);
+    }
+
+    /**
+     * Constructs an instance. This constructor is private; use {@link #make}.
+     *
+     * @param value the {@code short} value
+     */
+    private CstShort(short value) {
+        super(value);
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public String toString() {
+        int value = getIntBits();
+        return "short{0x" + Hex.u2(value) + " / " + value + '}';
+    }
+
+    /** {@inheritDoc} */
+    public Type getType() {
+        return Type.SHORT;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public String typeName() {
+        return "short";
+    }
+
+    /** {@inheritDoc} */
+    public String toHuman() {
+        return Integer.toString(getIntBits());
+    }
+
+    /**
+     * Gets the {@code short} value.
+     *
+     * @return the value
+     */
+    public short getValue() {
+        return (short) getIntBits();
+    }
+}