#ifndef INCLUDED_BOBCAT_MBUF_
#define INCLUDED_BOBCAT_MBUF_

#include <streambuf>
#include <memory>
#include <ostream>
#include <string>
#include <iosfwd>
#include <limits>

namespace FBB
{

class Mbuf: public std::streambuf
{
    std::shared_ptr<std::ofstream> d_ofstr;
    std::ostream d_ostr;        // this is the receiving ostream

    bool d_firstChar;
    bool d_throw;

    std::string d_tag;
    size_t d_count;             // counts # messages
    size_t d_maxCount;
    bool d_lineExcess;

    bool d_showLineNr;
    size_t d_lineNr;
    std::string d_lineTag;

    public:
        Mbuf();                                               // 1

        explicit Mbuf(std::streambuf *strbuf,                 // 2
                        size_t maxCount = std::numeric_limits<size_t>::max(),
                        std::string const &tag = "", bool throwing = false);

                                                                // 3
        explicit Mbuf(std::string const &name, size_t maxCount = 
                    std::numeric_limits<size_t>::max(), 
                     std::string const &tag = "", bool throwing = false);

        void reset(Mbuf const &mbuf);               // 1: initialize from 
                                                        // mbuf. Shares 
                                                        // d_ofstr and uses
                                                        // d_ostr's rdbuf
                                                    
        void reset(std::streambuf *strbuf, size_t maxCount,     // 2
                    std::string const &tag, bool throwing);

        void reset(std::string const &name, size_t maxCount,    // 3
                    std::string const &tag, bool throwing);

        bool throws() const;                                    // .f
        void throwing(bool ifTrue);                             // .f    
        size_t count() const;                                   // .f
        size_t maxCount() const;                                // .f
        std::string const &tag() const;                         // .f
        std::string const &lineTag() const;                     // .f
        void noLineNr();                                        // .f
        void setLineNr(size_t lineNr);
        void setCount(size_t count);                            // .f
        void setMaxCount(size_t maxCount);                      // .f
        void setTag(std::string const &tag);
        void setLineTag(std::string const &lineTag);            // .f
        bool lineExcess() const;                                // .f

    private:
        void atFirstChar();
        bool firstChar() const;
        void showTag();
        void inspectOfstr(std::string const &name) const;
        
        int overflow(int c) override;
        std::streamsize xsputn(char const *buf, std::streamsize n) override;
        int sync() override;
};

inline size_t Mbuf::count() const
{
    return d_count;
}
inline bool Mbuf::lineExcess() const
{
    return d_lineExcess;
}
inline std::string const &Mbuf::lineTag() const
{
    return d_lineTag;
}
inline size_t Mbuf::maxCount() const
{
    return d_maxCount;
}
inline void Mbuf::noLineNr()
{
    d_showLineNr = false;
}
inline void Mbuf::setCount(size_t count)
{
    d_count = count;
}
inline void Mbuf::setLineTag(std::string const &lineTag)
{
    d_lineTag = lineTag;
}
inline void Mbuf::setMaxCount(size_t maxCount)
{
    d_maxCount = maxCount;
}
inline std::string const &Mbuf::tag() const
{
    return d_tag;
}
inline void Mbuf::throwing(bool ifTrue)
{
    d_throw = ifTrue;
}
inline bool Mbuf::throws() const
{
    return d_throw;
}

} // FBB

#endif




