/* backdir
 *
 * Small example application which lists the first 10 files of a directory and
 * its subdirectories and then iterates back to the first file.
 *
 * It demonstrates how to use the operator-- of the filesystem::file_iterator.
 */

/* Note: Do not include config.h in your own programs. See README. */
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include <fs++/file_iterator.h>
#include <iostream>
#include <string>

using namespace std ;

int
main (int argc, char** argv)
	{
		if (argc != 2)
			{
				cerr << "Usage: backdir /some/directory" << endl ;
				return -1 ;
			}

		string dir (argv[1]) ;
		filesystem::file_iterator<> i (dir);

		const int maxcount = 10 ;

		for (int c = 0; (i != i.end ()) && (c < maxcount); c++, i++)
			{
				// This calls a special output operator for file_t ;-)
				cout << c << " " << (*i) << endl ;
			}

		if (i == i.end ())
			{
				cerr << endl << "Sorry, directory has less than " << maxcount
					<< " files." << endl ;

				return 1 ;
			}

		cout << "---" << endl ;
		i-- ;

		for (int c = (maxcount - 1) ; (i != i.end ()) && (c >= 0); c--, i--)
			{
				cout << c << " " << (*i) << endl ;
			}

		if (i != i.end ())
			{
				// This should not occure in this scenario ;-)
				cerr << "Strange, we are not yet at the beginning..." << endl ;
				return  1 ;
			}

		return 0 ;
	}