Directory access problem...

Ok, I believe it has something to do with the dirent.h code, but I may be mistaken.
This is the function,

Code:

void X_Crypt::PurgeReports()
{
    DIR *d;
    dirent *dir;

    std::string file;

    d = opendir("C:\\C++Projects\\X_Crypt\\reports\\");
    if (d)
    {
        while ((dir = readdir(d)) != NULL)
        {
            file = dir->d_name;
            if ( file.substr(file.size()-4) == ".xtr" )
            {
                file = "C:\\C++Projects\\X_Crypt\\reports\\" + file;
                remove(file.c_str());
            }
        }
    }
    closedir(d);
}

and it produces this Runtime error

Code:

This application has requested the Runtime to terminate in an unusual way.

I cant seem to find what the error is in the code. I am very thankful for any assistance you provide.

[edit]
I figured out that the error is the

Code:

if ( file.substr(file.length()-4) == ".xtr" )

, but I don't see what is wrong with the code.

Originally Posted by Raigne

I figured out that the error is the

Code:

if ( file.substr(file.length()-4) == ".xtr" )

, but I don't see what is wrong with the code.

What if teh length is shorter than 4 in the first place - that would cause a negative [1] substr - bad idea!

[1] Or if the result is looked at as an unsigned number, it would be a REALLY HUGE number - not any better.

--
Mats

thanks mat, I was thinking about it last night, and I figured out the scope is going negative for the ".", and ".." directory. wasnt thinking about it reading the directories to. Thank you for the assistance.