//===-- CommandHistory.h ----------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef liblldb_CommandHistory_h_
#define liblldb_CommandHistory_h_

// C Includes
// C++ Includes
#include <string>
#include <vector>

// Other libraries and framework includes
// Project includes
#include "lldb/lldb-private.h"
#include "lldb/Core/Stream.h"
#include "lldb/Host/Mutex.h"

namespace lldb_private {
    
class CommandHistory
{
public:
    CommandHistory ();
    
    ~CommandHistory ();
    
    size_t
    GetSize () const;
    
    bool
    IsEmpty () const;
    
    const char*
    FindString (const char* input_str) const;
    
    const char*
    GetStringAtIndex (size_t idx) const;
    
    const char*
    operator [] (size_t idx) const;
    
    const char*
    GetRecentmostString () const;
    
    void
    AppendString (const std::string& 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:
    DISALLOW_COPY_AND_ASSIGN(CommandHistory);
    
    typedef std::vector<std::string> History;
    mutable Mutex m_mutex;
    History m_history;
};

} // namespace lldb_private

#endif  // liblldb_CommandHistory_h_
