std::ofstream filename

[red floyd]

Is there any way to retrieve the filename given to a std::ofstream
(passed in constructor or in ofstream::open( ))?

Or, should I derive from ofstream (should probably be a template to
handle ifstream and fstream as well, but I'm typing on the fly)

yes, I know the syntax may be off...


class onamedfstream : public ofstream {
private:
std::string filename_;
public:
ofnamedstream() : ofstream() { }
ofnamedstream(c onst char * fname, ios_base::openm ode mode =
ios_base::out) :
filename_(fname ), ofstream(fname, mode) { }
~ofnamedstream( ) { }
void open(const char *fname, ios_base::openm ode = ios_base::out)
{
filename_ = fname;
ofstream::open( fname, mode);
}
const std::string& get_filename(vo id) const { return filename_; }
};

[Thomas Matthews]

Re: std::ofstream filename

red floyd wrote:[color=blue]
>
> Is there any way to retrieve the filename given to a std::ofstream
> (passed in constructor or in ofstream::open( ))?
>
> Or, should I derive from ofstream (should probably be a template to
> handle ifstream and fstream as well, but I'm typing on the fly)
>
> yes, I know the syntax may be off...
>
>
> class onamedfstream : public ofstream {
> private:
> std::string filename_;
> public:
> ofnamedstream() : ofstream() { }
> ofnamedstream(c onst char * fname, ios_base::openm ode mode =
> ios_base::out) :
> filename_(fname ), ofstream(fname, mode) { }
> ~ofnamedstream( ) { }
> void open(const char *fname, ios_base::openm ode = ios_base::out)
> {
> filename_ = fname;
> ofstream::open( fname, mode);
> }
> const std::string& get_filename(vo id) const { return filename_; }
> };
>[/color]

There are no _standard_ methods in the iostream library for
retrieving the filename after the stream has been opened.

Most programmers remember the filename by using some sort of
variable or string literal.

--
Thomas Matthews

C++ newsgroup welcome message:

http://www.slack.net/~shiva/welcome.txt

C++ Faq: http://www.parashift.com/c++-faq-lite
C Faq: http://www.eskimo.com/~scs/c-faq/top.html
alt.comp.lang.l earn.c-c++ faq:

http://www.raos.demon.uk/acllc-c++/faq.html

Other sites:
http://www.josuttis.com -- C++ STL Library book