1 //===-- CommandHistory.h ----------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLDB_INTERPRETER_COMMANDHISTORY_H
10 #define LLDB_INTERPRETER_COMMANDHISTORY_H
11 
12 #include <mutex>
13 #include <optional>
14 #include <string>
15 #include <vector>
16 
17 #include "lldb/Utility/Stream.h"
18 #include "lldb/lldb-private.h"
19 
20 namespace lldb_private {
21 
22 class CommandHistory {
23 public:
24   CommandHistory() = default;
25 
26   ~CommandHistory() = default;
27 
28   size_t GetSize() const;
29 
30   bool IsEmpty() const;
31 
32   std::optional<llvm::StringRef> FindString(llvm::StringRef input_str) const;
33 
34   llvm::StringRef GetStringAtIndex(size_t idx) const;
35 
36   llvm::StringRef operator[](size_t idx) const;
37 
38   llvm::StringRef GetRecentmostString() const;
39 
40   void AppendString(llvm::StringRef str, bool reject_if_dupe = true);
41 
42   void Clear();
43 
44   void Dump(Stream &stream, size_t start_idx = 0,
45             size_t stop_idx = SIZE_MAX) const;
46 
47   static const char g_repeat_char = '!';
48 
49 private:
50   CommandHistory(const CommandHistory &) = delete;
51   const CommandHistory &operator=(const CommandHistory &) = delete;
52 
53   typedef std::vector<std::string> History;
54   mutable std::recursive_mutex m_mutex;
55   History m_history;
56 };
57 
58 } // namespace lldb_private
59 
60 #endif // LLDB_INTERPRETER_COMMANDHISTORY_H
61