AAPT2: Support compiling a res/ directory and output to zip
This allows us to compile an entire directory and output to a single
file. This is important to support generated resources in the make
build, since we may not know what resources get generated.
The link step will accept the zip and read the contents of it as if they
were passed in on the command line.
Change-Id: If1a51b0abe772350c24074353eb4989953c2e0cb
diff --git a/tools/aapt2/io/File.h b/tools/aapt2/io/File.h
new file mode 100644
index 0000000..9fca398
--- /dev/null
+++ b/tools/aapt2/io/File.h
@@ -0,0 +1,72 @@
+/*
+ * 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.
+ */
+
+#ifndef AAPT_IO_FILE_H
+#define AAPT_IO_FILE_H
+
+#include "Source.h"
+#include "io/Data.h"
+
+#include <memory>
+#include <vector>
+
+namespace aapt {
+namespace io {
+
+/**
+ * Interface for a file, which could be a real file on the file system, or a file inside
+ * a ZIP archive.
+ */
+class IFile {
+public:
+ virtual ~IFile() = default;
+
+ /**
+ * Open the file and return it as a block of contiguous memory. How this occurs is
+ * implementation dependent. For example, if this is a file on the file system, it may
+ * simply mmap the contents. If this file represents a compressed file in a ZIP archive,
+ * it may need to inflate it to memory, incurring a copy.
+ *
+ * Returns nullptr on failure.
+ */
+ virtual std::unique_ptr<IData> openAsData() = 0;
+
+ /**
+ * Returns the source of this file. This is for presentation to the user and may not be a
+ * valid file system path (for example, it may contain a '@' sign to separate the files within
+ * a ZIP archive from the path to the containing ZIP archive.
+ */
+ virtual const Source& getSource() const = 0;
+};
+
+/**
+ * Interface for a collection of files, all of which share a common source. That source may
+ * simply be the filesystem, or a ZIP archive.
+ */
+class IFileCollection {
+public:
+ virtual ~IFileCollection() = default;
+
+ using const_iterator = std::vector<std::unique_ptr<IFile>>::const_iterator;
+
+ virtual const_iterator begin() const = 0;
+ virtual const_iterator end() const = 0;
+};
+
+} // namespace io
+} // namespace aapt
+
+#endif /* AAPT_IO_FILE_H */