CODEWITHSUNDEEP
c++
Jesse Carter
Jesse Carter

Reputation: 21147

filesystem directory_iterator not returning full file path

EDIT: I'm using std::tr2::sys not boost's filesytem

I'm working on a simple app that scans directories on the computer and returns statistics about those files. There are two ways that scan can be called: recursively and non-recursively. A path is passed into the scan method along with a flag for whether or not the scan should be done recursively. Given the path folder the two implementations look something like this:

directory_iterator start( folder ), end;
for( ; start != end; ++start ) {
    //Some code in here
    // get the path like this:
    auto path = start->path();
}

or

recursive_directory_iterator start( folder ), end;
for( ; start != end; ++start ) {
    //Some code in here
    // get the path like this:
    auto path = start->path();
}

The problem I'm encountering is that in the block that uses the regular directory_iterator when I try and grab the path it will return only the file name ie. "myTextFile.txt" where as getting it from the recursive_directory_iterator returns the full path to the file on the system. In each case the value of folder is the same (a full file path as well). Is there a reason the front part of the path is getting chopped off or is there some way I can get the full file path from just the abbreviated one that I'm getting back from directory_iterator?

Upvotes: 1

Views: 3628

Answers (2)

Jesse Good
Jesse Good

Reputation: 52365

Use the complete function:

auto full_path = std::tr2::sys::complete(path, folder);

Another simple way to do it would be be to simply append the filename to the path (tested on MSVC2012 with the <filesystem> in the std::tr2::sys namespace):

for (; start != end; ++start) {
    auto path = start->path();
    auto full_path = folder / path;
}

Upvotes: 1

P0W
P0W

Reputation: 47784

For full path you need to use start->path().directory_string() 

directory_iterator end;
for (directory_iterator start(p);
      start != end;
      ++start)
{
    if (is_directory(start->status()))
    {
      //A directory
    }
    if (is_regular_file(start->status()))
    {   
      std::cout << start->path().directory_string()<< "\n";
    }
}

Play around with following based on your need, refer boost docs for more details, however names their suggest all.

start->path().branch_path();
start->path().directory_string();
start->path().file_string();
start->path().root_path();
start->path().parent_path();
start->path().string();
start->path().basename();
start->path().filename();
start->path().root_name();
start->path().relative_path();

Upvotes: 2

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