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/Logger.cpp b/tools/aapt2/Logger.cpp
new file mode 100644
index 0000000..3847185
--- /dev/null
+++ b/tools/aapt2/Logger.cpp
@@ -0,0 +1,97 @@
+/*
+ * 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 "Logger.h"
+#include "Source.h"
+
+#include <memory>
+#include <iostream>
+
+namespace aapt {
+
+Log::Log(std::ostream& _out, std::ostream& _err) : out(_out), err(_err) {
+}
+
+std::shared_ptr<Log> Logger::sLog(std::make_shared<Log>(std::cerr, std::cerr));
+
+void Logger::setLog(const std::shared_ptr<Log>& log) {
+    sLog = log;
+}
+
+std::ostream& Logger::error() {
+    return sLog->err << "error: ";
+}
+
+std::ostream& Logger::error(const Source& source) {
+    return sLog->err << source << ": error: ";
+}
+
+std::ostream& Logger::error(const SourceLine& source) {
+    return sLog->err << source << ": error: ";
+}
+
+std::ostream& Logger::warn() {
+    return sLog->err << "warning: ";
+}
+
+std::ostream& Logger::warn(const Source& source) {
+    return sLog->err << source << ": warning: ";
+}
+
+std::ostream& Logger::warn(const SourceLine& source) {
+    return sLog->err << source << ": warning: ";
+}
+
+std::ostream& Logger::note() {
+    return sLog->out << "note: ";
+}
+
+std::ostream& Logger::note(const Source& source) {
+    return sLog->err << source << ": note: ";
+}
+
+std::ostream& Logger::note(const SourceLine& source) {
+    return sLog->err << source << ": note: ";
+}
+
+SourceLogger::SourceLogger(const Source& source)
+: mSource(source) {
+}
+
+std::ostream& SourceLogger::error() {
+    return Logger::error(mSource);
+}
+
+std::ostream& SourceLogger::error(size_t line) {
+    return Logger::error(SourceLine{ mSource.path, line });
+}
+
+std::ostream& SourceLogger::warn() {
+    return Logger::warn(mSource);
+}
+
+std::ostream& SourceLogger::warn(size_t line) {
+    return Logger::warn(SourceLine{ mSource.path, line });
+}
+
+std::ostream& SourceLogger::note() {
+    return Logger::note(mSource);
+}
+
+std::ostream& SourceLogger::note(size_t line) {
+    return Logger::note(SourceLine{ mSource.path, line });
+}
+
+} // namespace aapt