Reinterpret cast can fail on a structure with char array inside it =

[tonnot]

Thanks Here you are

struct W__header {
    int          number; 
    char          title [200];
    double       inicial, final;
    int           num;
    float         interval;
};

struct W__header {
    int          number; 
    char          title [200];
    double       inicial, final;
    int           num;
    float         interval;
};

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To set the title I have ( I think here is the problem :

void set_title(std::string txt) {
   strncpy(title,texto.c_str(),200) ;  }

void set_title(std::string txt) {
   strncpy(title,texto.c_str(),200) ;  }

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And my 'put' function :

template <class TTput_stream>
void W_inpout::W_stream::put (TTput_stream &value) {    
                 loc+= sizeof value;                   it works fine
                 lof=loc;
                 const char * buffer ;
                 buffer = reinterpret_cast<const char*> (&value);
}

template <class TTput_stream>
void W_inpout::W_stream::put (TTput_stream &value) {    
                 loc+= sizeof value;                   it works fine
                 lof=loc;
                 const char * buffer ;
                 buffer = reinterpret_cast<const char*> (&value);
}

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I user put(my_class->header);

The buffer and the function works fine with my other structures.
At debugger I see title filled with the std::text passed to ser_title an a lot of \0 until the end of var

Maybe reinterpret_cast does not work becase the structure has the char 'title' inside it ?


Any help would be appreciated.