AAPT2: Define and Implement AAPT Container Format
AAPT Container Format (.apc) is a simple container that
enumerates the various intermediate files that AAPT2 generates
during the compile phase.
The format is defined in formats.md.
For now, continue using the .flat extension for the container file,
and keep making use of the .flata zip for storing multiple files.
This will allow easier integration with existing build systems and allow
the evolution of the APC format to better handle arbitrarily large
files.
Test: make aapt2_tests
Change-Id: Id7216e5b76316bdd683f0fa4eaf2d2da273ba815
diff --git a/tools/aapt2/io/FileStream.h b/tools/aapt2/io/FileStream.h
new file mode 100644
index 0000000..3b07667
--- /dev/null
+++ b/tools/aapt2/io/FileStream.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2017 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_FILESTREAM_H
+#define AAPT_IO_FILESTREAM_H
+
+#include "io/Io.h"
+
+#include <memory>
+#include <string>
+
+#include "android-base/file.h" // for O_BINARY
+#include "android-base/macros.h"
+#include "android-base/unique_fd.h"
+
+namespace aapt {
+namespace io {
+
+class FileInputStream : public InputStream {
+ public:
+ explicit FileInputStream(const std::string& path, size_t buffer_capacity = 4096);
+
+ // Takes ownership of `fd`.
+ explicit FileInputStream(int fd, size_t buffer_capacity = 4096);
+
+ bool Next(const void** data, size_t* size) override;
+
+ void BackUp(size_t count) override;
+
+ size_t ByteCount() const override;
+
+ bool HadError() const override;
+
+ std::string GetError() const override;
+
+ private:
+ DISALLOW_COPY_AND_ASSIGN(FileInputStream);
+
+ android::base::unique_fd fd_;
+ std::string error_;
+ std::unique_ptr<uint8_t[]> buffer_;
+ size_t buffer_capacity_;
+ size_t buffer_offset_;
+ size_t buffer_size_;
+ size_t total_byte_count_;
+};
+
+class FileOutputStream : public OutputStream {
+ public:
+ explicit FileOutputStream(const std::string& path, int mode = O_RDWR | O_CREAT | O_BINARY,
+ size_t buffer_capacity = 4096);
+
+ // Takes ownership of `fd`.
+ explicit FileOutputStream(int fd, size_t buffer_capacity = 4096);
+
+ ~FileOutputStream();
+
+ bool Next(void** data, size_t* size) override;
+
+ // Immediately flushes out the contents of the buffer to disk.
+ bool Flush();
+
+ void BackUp(size_t count) override;
+
+ size_t ByteCount() const override;
+
+ bool HadError() const override;
+
+ std::string GetError() const override;
+
+ private:
+ DISALLOW_COPY_AND_ASSIGN(FileOutputStream);
+
+ bool FlushImpl();
+
+ android::base::unique_fd fd_;
+ std::string error_;
+ std::unique_ptr<uint8_t[]> buffer_;
+ size_t buffer_capacity_;
+ size_t buffer_offset_;
+ size_t total_byte_count_;
+};
+
+} // namespace io
+} // namespace aapt
+
+#endif // AAPT_IO_FILESTREAM_H