Add ElfWriter::GetStream().
This will be used for writing the OatHeader which is
currently oddly written through the .text stream.
Also move the error delaying output stream out of the
ElfBuilder<> to its own file and move all output stream
files to compiler/linker/.
Change-Id: I00db4e33ed80ac4757ec459946c7b5ae014a3a2e
diff --git a/compiler/linker/buffered_output_stream.h b/compiler/linker/buffered_output_stream.h
new file mode 100644
index 0000000..a2eefbb
--- /dev/null
+++ b/compiler/linker/buffered_output_stream.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2013 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 ART_COMPILER_LINKER_BUFFERED_OUTPUT_STREAM_H_
+#define ART_COMPILER_LINKER_BUFFERED_OUTPUT_STREAM_H_
+
+#include <memory>
+
+#include "output_stream.h"
+
+#include "globals.h"
+
+namespace art {
+
+class BufferedOutputStream FINAL : public OutputStream {
+ public:
+ explicit BufferedOutputStream(std::unique_ptr<OutputStream> out);
+
+ ~BufferedOutputStream() OVERRIDE;
+
+ bool WriteFully(const void* buffer, size_t byte_count) OVERRIDE;
+
+ off_t Seek(off_t offset, Whence whence) OVERRIDE;
+
+ bool Flush() OVERRIDE;
+
+ private:
+ static const size_t kBufferSize = 8 * KB;
+
+ bool FlushBuffer();
+
+ std::unique_ptr<OutputStream> const out_;
+ uint8_t buffer_[kBufferSize];
+ size_t used_;
+
+ DISALLOW_COPY_AND_ASSIGN(BufferedOutputStream);
+};
+
+} // namespace art
+
+#endif // ART_COMPILER_LINKER_BUFFERED_OUTPUT_STREAM_H_