Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Support/BinaryStream.h b/linux-x64/clang/include/llvm/Support/BinaryStream.h
new file mode 100644
index 0000000..d69a03e
--- /dev/null
+++ b/linux-x64/clang/include/llvm/Support/BinaryStream.h
@@ -0,0 +1,102 @@
+//===- BinaryStream.h - Base interface for a stream of data -----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_BINARYSTREAM_H
+#define LLVM_SUPPORT_BINARYSTREAM_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/BitmaskEnum.h"
+#include "llvm/Support/BinaryStreamError.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include <cstdint>
+
+namespace llvm {
+
+enum BinaryStreamFlags {
+ BSF_None = 0,
+ BSF_Write = 1, // Stream supports writing.
+ BSF_Append = 2, // Writing can occur at offset == length.
+ LLVM_MARK_AS_BITMASK_ENUM(/* LargestValue = */ BSF_Append)
+};
+
+/// \brief An interface for accessing data in a stream-like format, but which
+/// discourages copying. Instead of specifying a buffer in which to copy
+/// data on a read, the API returns an ArrayRef to data owned by the stream's
+/// implementation. Since implementations may not necessarily store data in a
+/// single contiguous buffer (or even in memory at all), in such cases a it may
+/// be necessary for an implementation to cache such a buffer so that it can
+/// return it.
+class BinaryStream {
+public:
+ virtual ~BinaryStream() = default;
+
+ virtual llvm::support::endianness getEndian() const = 0;
+
+ /// \brief Given an offset into the stream and a number of bytes, attempt to
+ /// read the bytes and set the output ArrayRef to point to data owned by the
+ /// stream.
+ virtual Error readBytes(uint32_t Offset, uint32_t Size,
+ ArrayRef<uint8_t> &Buffer) = 0;
+
+ /// \brief Given an offset into the stream, read as much as possible without
+ /// copying any data.
+ virtual Error readLongestContiguousChunk(uint32_t Offset,
+ ArrayRef<uint8_t> &Buffer) = 0;
+
+ /// \brief Return the number of bytes of data in this stream.
+ virtual uint32_t getLength() = 0;
+
+ /// \brief Return the properties of this stream.
+ virtual BinaryStreamFlags getFlags() const { return BSF_None; }
+
+protected:
+ Error checkOffsetForRead(uint32_t Offset, uint32_t DataSize) {
+ if (Offset > getLength())
+ return make_error<BinaryStreamError>(stream_error_code::invalid_offset);
+ if (getLength() < DataSize + Offset)
+ return make_error<BinaryStreamError>(stream_error_code::stream_too_short);
+ return Error::success();
+ }
+};
+
+/// \brief A BinaryStream which can be read from as well as written to. Note
+/// that writing to a BinaryStream always necessitates copying from the input
+/// buffer to the stream's backing store. Streams are assumed to be buffered
+/// so that to be portable it is necessary to call commit() on the stream when
+/// all data has been written.
+class WritableBinaryStream : public BinaryStream {
+public:
+ ~WritableBinaryStream() override = default;
+
+ /// \brief Attempt to write the given bytes into the stream at the desired
+ /// offset. This will always necessitate a copy. Cannot shrink or grow the
+ /// stream, only writes into existing allocated space.
+ virtual Error writeBytes(uint32_t Offset, ArrayRef<uint8_t> Data) = 0;
+
+ /// \brief For buffered streams, commits changes to the backing store.
+ virtual Error commit() = 0;
+
+ /// \brief Return the properties of this stream.
+ BinaryStreamFlags getFlags() const override { return BSF_Write; }
+
+protected:
+ Error checkOffsetForWrite(uint32_t Offset, uint32_t DataSize) {
+ if (!(getFlags() & BSF_Append))
+ return checkOffsetForRead(Offset, DataSize);
+
+ if (Offset > getLength())
+ return make_error<BinaryStreamError>(stream_error_code::invalid_offset);
+ return Error::success();
+ }
+};
+
+} // end namespace llvm
+
+#endif // LLVM_SUPPORT_BINARYSTREAM_H