[Boost-users] boost::filesystem directory_iterator: how to get the last file of a directory ?

Subject: [Boost-users] boost::filesystem directory_iterator: how to get the last file of a directory ?
From: Vial, Florent (fvial_at_[hidden])
Date: 2010-03-12 06:54:33

Hi boost-users,

I am using a recursvive function for iterating over a starting path.
When i finally arrive in a directory that contains no subdirectory
(what i call a "final" directory), i want to retrieve
the first and the last file of this directory.
I succeed in retrieving the first file of the final directory (see code
snippet below),
But i do not know how to retireve the last one using the same directory
iterator.

Can someone think of an elegant solution ?

------------------ CODE BEGIN -------

namespace fs = boost::filesystem;
void my_function (const fs::path &ph)
{
      bool firstFileOfFinalDir = false;
        if (fs::is_directory(ph))
        {
                fs::directory_iterator end_iter;
                for (fs::directory_iterator dir_itr(ph); dir_itr !=
end_iter; ++dir_itr)
                {
                    if (fs::is_directory(dir_itr->status()))
                {
                    // Recursive call
                    my_function(fs::path(dir_itr->path()));
                }
                else
                    {
                   // We are in a "final" directory
                       if (fs::is_regular_file( dir_itr->status()))
                         {
                                if (firstFileOfFinalDir)
                                {
                                        // Do something with the first
file of the final directory
                                        firstFileOfFinalDir = false;
                                }
                        else
                                {
                            // My problem : how to check if 
                                    // dir_itr == (end_iter - 1)
                            // i.e. if it is the last valid value ?
                                }
                       }

                }

                }
        }
}

------------------ CODE END -------

Thank you in advance for your help,
Florent

 
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