1  #pragma once
 2  
 3  #include <stddef.h>
 4  
 5  namespace console {
 6  
 7  //------------------------------------------
 8  //  History — command history with navigation
 9  //------------------------------------------
10  class History {
11  public:
12    History(size_t max_entries = 16, bool is_deduplicating = true);
13  
14    void add(const char *command);
15    const char *previous();
16    const char *next();
17    void reset_position();
18    void clear();
19    size_t length() const;
20    bool is_empty() const;
21  
22    void load(const char *path);
23    void save(const char *path) const;
24  
25  private:
26    static constexpr size_t MAX_ENTRIES = 16;
27    static constexpr size_t ENTRY_SIZE = 256;
28  
29    char entries_[MAX_ENTRIES][ENTRY_SIZE];
30    size_t count_;
31    size_t max_entries_;
32    int current_index_;
33    bool is_deduplicating_;
34  };
35  
36  }