Function clean

src/OpenFOAM/primitives/strings/fileName/fileName.C:78–169

bool Foam::fileName::clean()
{
    // The top slash - we are never allowed to go above it
    string::size_type top = this->find('/');

    // No slashes - nothing to do
    if (top == string::npos)
    {
        return false;
    }

    // Start with the '/' found:
    char prev = '/';
    string::size_type nChar  = top+1;
    string::size_type maxLen = this->size();

    for
    (
        string::size_type src = nChar;
        src < maxLen;
    )
    {
        char c = operator[](src++);

        if (prev == '/')
        {
            // Repeated '/' - skip it
            if (c == '/')
            {
                continue;
            }

            // Could be '/./' or '/../'
            if (c == '.')
            {
                // Found trailing '/.' - skip it
                if (src >= maxLen)
                {
                    continue;
                }


                // Peek at the next character
                char c1 = operator[](src);

                // Found '/./' - skip it
                if (c1 == '/')
                {
                    src++;
                    continue;
                }

                // It is '/..' or '/../'
                if (c1 == '.' && (src+1 >= maxLen || operator[](src+1) == '/'))
                {
                    string::size_type parent;

                    // Backtrack to find the parent directory