LineBuffer.h

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#pragma once
#include <iostream>
#include <misc/gen/TClosure.h>
#include <misc/gen/TFifoClass.h>
#include <misc/global.h>
 
namespace sf
{
 
class _MISC_CLASS LineBuffer : public std::streambuf
{
  public:
    explicit LineBuffer(unsigned max_lines);
    ~LineBuffer() override;
    [[nodiscard]] std::string getLine(unsigned line) const;
    [[nodiscard]] int lineCount() const;
    [[nodiscard]] int totalLineCount() const
    {
      return _totalLineCount;
    }
    void clear();
    void setMaxLines(unsigned max_lines);
    typedef TClosure<void, LineBuffer* /*sender*/, const std::string& /*line*/> event_t;
    void setNewLineHandler(const event_t& event);
    const event_t& newLineHandler();
 
  private:
    int overflow(int c /*=EOF*/) override;
    std::streamsize xsputn(const char* s, std::streamsize count) override;
    TFifoClass<std::string*> _lineFifo;
    int _totalLineCount;
    event_t _onOnNewLine;
};
 
}// namespace sf