AAPT2

First checking of AAPT2. The individual phases of AAPT2 work, but there
are some missing pieces.

For early testing we are missing:
- Need to properly mark file references and include them in package
- Need to package into zip

Final AAPT for apps we are missing:
- Need to crush PNGs
- Need to parse 9-patches
- Need to validate all of AndroidManifest.xml
- Need to write align method to align resource tables for splits.

Final AAPT for apps + system we are missing:
- Need to handle overlays
- Need to store comments for R file
- Need to handle --shared-lib (dynamic references too).

New AAPT features coming:
- Need to import compiled libraries
    - Name mangling
    - R file generation for library code

Change-Id: I95f8a63581b81a1f424ae6fb2c373c883b72c18d
diff --git a/tools/aapt2/ScopedXmlPullParser.cpp b/tools/aapt2/ScopedXmlPullParser.cpp
new file mode 100644
index 0000000..d9ae72c
--- /dev/null
+++ b/tools/aapt2/ScopedXmlPullParser.cpp
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+#include "ScopedXmlPullParser.h"
+
+#include <string>
+
+namespace aapt {
+
+ScopedXmlPullParser::ScopedXmlPullParser(XmlPullParser* parser) :
+        mParser(parser), mDepth(parser->getDepth()), mDone(false) {
+}
+
+ScopedXmlPullParser::~ScopedXmlPullParser() {
+    while (isGoodEvent(next()));
+}
+
+XmlPullParser::Event ScopedXmlPullParser::next() {
+    if (mDone) {
+        return Event::kEndDocument;
+    }
+
+    const Event event = mParser->next();
+    if (mParser->getDepth() <= mDepth) {
+        mDone = true;
+    }
+    return event;
+}
+
+XmlPullParser::Event ScopedXmlPullParser::getEvent() const {
+    return mParser->getEvent();
+}
+
+const std::string& ScopedXmlPullParser::getLastError() const {
+    return mParser->getLastError();
+}
+
+const std::u16string& ScopedXmlPullParser::getComment() const {
+    return mParser->getComment();
+}
+
+size_t ScopedXmlPullParser::getLineNumber() const {
+    return mParser->getLineNumber();
+}
+
+size_t ScopedXmlPullParser::getDepth() const {
+    const size_t depth = mParser->getDepth();
+    if (depth < mDepth) {
+        return 0;
+    }
+    return depth - mDepth;
+}
+
+const std::u16string& ScopedXmlPullParser::getText() const {
+    return mParser->getText();
+}
+
+const std::u16string& ScopedXmlPullParser::getNamespacePrefix() const {
+    return mParser->getNamespacePrefix();
+}
+
+const std::u16string& ScopedXmlPullParser::getNamespaceUri() const {
+    return mParser->getNamespaceUri();
+}
+
+const std::u16string& ScopedXmlPullParser::getElementNamespace() const {
+    return mParser->getElementNamespace();
+}
+
+const std::u16string& ScopedXmlPullParser::getElementName() const {
+    return mParser->getElementName();
+}
+
+size_t ScopedXmlPullParser::getAttributeCount() const {
+    return mParser->getAttributeCount();
+}
+
+XmlPullParser::const_iterator ScopedXmlPullParser::beginAttributes() const {
+    return mParser->beginAttributes();
+}
+
+XmlPullParser::const_iterator ScopedXmlPullParser::endAttributes() const {
+    return mParser->endAttributes();
+}
+
+} // namespace aapt