Add several classes from dx tool to the dexgen project

[android-x86/dalvik.git] / dexgen / src / com / android / dexgen / dex / file / ProtoIdsSection.java

diff --git a/dexgen/src/com/android/dexgen/dex/file/ProtoIdsSection.java b/dexgen/src/com/android/dexgen/dex/file/ProtoIdsSection.java
new file mode 100644 (file)
index 0000000..b2af84e
--- /dev/null
+++ b/dexgen/src/com/android/dexgen/dex/file/ProtoIdsSection.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2008 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.file;
+
+import com.android.dexgen.rop.cst.Constant;
+import com.android.dexgen.rop.type.Prototype;
+import com.android.dexgen.util.AnnotatedOutput;
+import com.android.dexgen.util.Hex;
+
+import java.util.Collection;
+import java.util.TreeMap;
+
+/**
+ * Proto (method prototype) identifiers list section of a
+ * {@code .dex} file.
+ */
+public final class ProtoIdsSection extends UniformItemSection {
+    /**
+     * {@code non-null;} map from method prototypes to {@link ProtoIdItem} instances
+     */
+    private final TreeMap<Prototype, ProtoIdItem> protoIds;
+
+    /**
+     * Constructs an instance. The file offset is initially unknown.
+     *
+     * @param file {@code non-null;} file that this instance is part of
+     */
+    public ProtoIdsSection(DexFile file) {
+        super("proto_ids", file, 4);
+
+        protoIds = new TreeMap<Prototype, ProtoIdItem>();
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public Collection<? extends Item> items() {
+        return protoIds.values();
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public IndexedItem get(Constant cst) {
+        throw new UnsupportedOperationException("unsupported");
+    }
+
+    /**
+     * Writes the portion of the file header that refers to this instance.
+     *
+     * @param out {@code non-null;} where to write
+     */
+    public void writeHeaderPart(AnnotatedOutput out) {
+        throwIfNotPrepared();
+
+        int sz = protoIds.size();
+        int offset = (sz == 0) ? 0 : getFileOffset();
+
+        if (sz > 65536) {
+            throw new UnsupportedOperationException("too many proto ids");
+        }
+
+        if (out.annotates()) {
+            out.annotate(4, "proto_ids_size:  " + Hex.u4(sz));
+            out.annotate(4, "proto_ids_off:   " + Hex.u4(offset));
+        }
+
+        out.writeInt(sz);
+        out.writeInt(offset);
+    }
+
+    /**
+     * Interns an element into this instance.
+     *
+     * @param prototype {@code non-null;} the prototype to intern
+     * @return {@code non-null;} the interned reference
+     */
+    public ProtoIdItem intern(Prototype prototype) {
+        if (prototype == null) {
+            throw new NullPointerException("prototype == null");
+        }
+
+        throwIfPrepared();
+
+        ProtoIdItem result = protoIds.get(prototype);
+
+        if (result == null) {
+            result = new ProtoIdItem(prototype);
+            protoIds.put(prototype, result);
+        }
+
+        return result;
+    }
+
+    /**
+     * Gets the index of the given prototype, which must have
+     * been added to this instance.
+     *
+     * @param prototype {@code non-null;} the prototype to look up
+     * @return {@code >= 0;} the reference's index
+     */
+    public int indexOf(Prototype prototype) {
+        if (prototype == null) {
+            throw new NullPointerException("prototype == null");
+        }
+
+        throwIfNotPrepared();
+
+        ProtoIdItem item = protoIds.get(prototype);
+
+        if (item == null) {
+            throw new IllegalArgumentException("not found");
+        }
+
+        return item.getIndex();
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    protected void orderItems() {
+        int idx = 0;
+
+        for (Object i : items()) {
+            ((ProtoIdItem) i).setIndex(idx);
+            idx++;
+        }
+    }
+}