CommandHistory.h

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//===-- CommandHistory.h ----------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#ifndef LLDB_INTERPRETER_COMMANDHISTORY_H
#define LLDB_INTERPRETER_COMMANDHISTORY_H
 
#include <mutex>
#include <string>
#include <vector>
 
#include "lldb/Utility/Stream.h"
#include "lldb/lldb-private.h"
 
namespace lldb_private {
 
class CommandHistory {
public:
  CommandHistory() = default;
 
  ~CommandHistory() = default;
 
  size_t GetSize() const;
 
  bool IsEmpty() const;
 
  llvm::Optional<llvm::StringRef> FindString(llvm::StringRef input_str) const;
 
  llvm::StringRef GetStringAtIndex(size_t idx) const;
 
  llvm::StringRef operator[](size_t idx) const;
 
  llvm::StringRef GetRecentmostString() const;
 
  void AppendString(llvm::StringRef str, bool reject_if_dupe = true);
 
  void Clear();
 
  void Dump(Stream &stream, size_t start_idx = 0,
            size_t stop_idx = SIZE_MAX) const;
 
  static const char g_repeat_char = '!';
 
private:
  CommandHistory(const CommandHistory &) = delete;
  const CommandHistory &operator=(const CommandHistory &) = delete;
 
  typedef std::vector<std::string> History;
  mutable std::recursive_mutex m_mutex;
  History m_history;
};
 
} // namespace lldb_private
 
#endif // LLDB_INTERPRETER_COMMANDHISTORY_H