1 files changed, 210 insertions, 0 deletions
diff --git a/dx/src/com/android/dx/dex/file/StringIdsSection.java b/dx/src/com/android/dx/dex/file/StringIdsSection.java
new file mode 100644
index 0000000..9039f43
--- /dev/null
+++ b/dx/src/com/android/dx/dex/file/StringIdsSection.java
@@ -0,0 +1,210 @@
+/*
+ * 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.dex.file;
+
+import com.android.dx.rop.cst.Constant;
+import com.android.dx.rop.cst.CstNat;
+import com.android.dx.rop.cst.CstString;
+import com.android.dx.rop.cst.CstUtf8;
+import com.android.dx.util.AnnotatedOutput;
+import com.android.dx.util.Hex;
+
+import java.util.Collection;
+import java.util.TreeMap;
+
+/**
+ * Strings list section of a {@code .dex} file.
+ */
+public final class StringIdsSection
+        extends UniformItemSection {
+    /**
+     * {@code non-null;} map from string constants to {@link
+     * StringIdItem} instances
+     */
+    private final TreeMap<CstUtf8, StringIdItem> strings;
+
+    /**
+     * Constructs an instance. The file offset is initially unknown.
+     *
+     * @param file {@code non-null;} file that this instance is part of
+     */
+    public StringIdsSection(DexFile file) {
+        super("string_ids", file, 4);
+
+        strings = new TreeMap<CstUtf8, StringIdItem>();
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public Collection<? extends Item> items() {
+        return strings.values();
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public IndexedItem get(Constant cst) {
+        if (cst == null) {
+            throw new NullPointerException("cst == null");
+        }
+
+        throwIfNotPrepared();
+
+        if (cst instanceof CstString) {
+            cst = ((CstString) cst).getString();
+        }
+
+        IndexedItem result = strings.get((CstUtf8) cst);
+
+        if (result == null) {
+            throw new IllegalArgumentException("not found");
+        }
+
+        return result;
+    }
+
+    /**
+     * 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 = strings.size();
+        int offset = (sz == 0) ? 0 : getFileOffset();
+
+        if (out.annotates()) {
+            out.annotate(4, "string_ids_size: " + Hex.u4(sz));
+            out.annotate(4, "string_ids_off:  " + Hex.u4(offset));
+        }
+
+        out.writeInt(sz);
+        out.writeInt(offset);
+    }
+
+    /**
+     * Interns an element into this instance.
+     *
+     * @param string {@code non-null;} the string to intern, as a regular Java
+     * {@code String}
+     * @return {@code non-null;} the interned string
+     */
+    public StringIdItem intern(String string) {
+        CstUtf8 utf8 = new CstUtf8(string);
+        return intern(new StringIdItem(utf8));
+    }
+
+    /**
+     * Interns an element into this instance.
+     *
+     * @param string {@code non-null;} the string to intern, as a {@link CstString}
+     * @return {@code non-null;} the interned string
+     */
+    public StringIdItem intern(CstString string) {
+        CstUtf8 utf8 = string.getString();
+        return intern(new StringIdItem(utf8));
+    }
+
+    /**
+     * Interns an element into this instance.
+     *
+     * @param string {@code non-null;} the string to intern, as a constant
+     * @return {@code non-null;} the interned string
+     */
+    public StringIdItem intern(CstUtf8 string) {
+        return intern(new StringIdItem(string));
+    }
+
+    /**
+     * Interns an element into this instance.
+     *
+     * @param string {@code non-null;} the string to intern
+     * @return {@code non-null;} the interned string
+     */
+    public StringIdItem intern(StringIdItem string) {
+        if (string == null) {
+            throw new NullPointerException("string == null");
+        }
+
+        throwIfPrepared();
+
+        CstUtf8 value = string.getValue();
+        StringIdItem already = strings.get(value);
+
+        if (already != null) {
+            return already;
+        }
+
+        strings.put(value, string);
+        return string;
+    }
+
+    /**
+     * Interns the components of a name-and-type into this instance.
+     *
+     * @param nat {@code non-null;} the name-and-type
+     */
+    public void intern(CstNat nat) {
+        intern(nat.getName());
+        intern(nat.getDescriptor());
+    }
+
+    /**
+     * Gets the index of the given string, which must have been added
+     * to this instance.
+     *
+     * @param string {@code non-null;} the string to look up
+     * @return {@code >= 0;} the string's index
+     */
+    public int indexOf(CstUtf8 string) {
+        if (string == null) {
+            throw new NullPointerException("string == null");
+        }
+
+        throwIfNotPrepared();
+
+        StringIdItem s = strings.get(string);
+
+        if (s == null) {
+            throw new IllegalArgumentException("not found");
+        }
+
+        return s.getIndex();
+    }
+
+    /**
+     * Gets the index of the given string, which must have been added
+     * to this instance.
+     *
+     * @param string {@code non-null;} the string to look up
+     * @return {@code >= 0;} the string's index
+     */
+    public int indexOf(CstString string) {
+        return indexOf(string.getString());
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    protected void orderItems() {
+        int idx = 0;
+
+        for (StringIdItem s : strings.values()) {
+            s.setIndex(idx);
+            idx++;
+        }
+    }
+}