//===- ByteStream.h - Reads stream data from a byte sequence ----*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_DEBUGINFO_CODEVIEW_BYTESTREAM_H
#define LLVM_DEBUGINFO_CODEVIEW_BYTESTREAM_H

#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/DebugInfo/CodeView/StreamInterface.h"
#include "llvm/Support/Error.h"
#include <cstdint>
#include <memory>

namespace llvm {
namespace codeview {
class StreamReader;

class ByteStream : public StreamInterface {
public:
  ByteStream();
  explicit ByteStream(MutableArrayRef<uint8_t> Bytes);
  explicit ByteStream(uint32_t Length);
  ~ByteStream() override;

  void reset();
  void initialize(MutableArrayRef<uint8_t> Bytes);
  void initialize(uint32_t Length);
  Error initialize(StreamReader &Reader, uint32_t Length);

  Error readBytes(uint32_t Offset,
                  MutableArrayRef<uint8_t> Buffer) const override;

  Error getArrayRef(uint32_t Offset, ArrayRef<uint8_t> &Buffer,
                    uint32_t Length) const override;

  uint32_t getLength() const override;

  ArrayRef<uint8_t> data() const { return Data; }
  StringRef str() const;

private:
  MutableArrayRef<uint8_t> Data;
  std::unique_ptr<uint8_t[]> Ownership;
};

} // end namespace pdb
} // end namespace llvm

#endif // LLVM_DEBUGINFO_CODEVIEW_BYTESTREAM_H