Recursively find all files under directory

thing.cpp

std::vector<std::string> get_files_in_subdirectories(
	const std::string &directory)
{
	std::string newdir =  directory;
	if (directory.back() != '\0')
	{
		newdir.push_back('\0');
	}

	WIN32_FIND_DATA find_file_data;
	const HANDLE h_find = FindFirstFile((directory + "*").c_str(),
	                                    &find_file_data);
	if (h_find == INVALID_HANDLE_VALUE)
	{
		return {};
	}

	std::vector<std::string> paths;
	std::string fixed_path = directory;
	do
	{
		if (strcmp(find_file_data.cFileName, ".") != 0 && strcmp(
			find_file_data.cFileName, "..") != 0)
		{

			std::string full_path = directory + find_file_data.cFileName;
			if (find_file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
			{
				if (directory[directory.size() - 2] == '\0') {
					if (directory.back() == '\\') {
						fixed_path.pop_back();
						fixed_path.pop_back();
					}
				}
				if (directory.back() != '\\') {
					fixed_path.push_back('\\');
				}
				full_path = fixed_path + find_file_data.cFileName;
				for (const auto& path : get_files_in_subdirectories(
					     full_path + "\\"))
				{
					paths.push_back(path);
				}
			} else
			{
				paths.push_back(full_path);
			}
		}
	}
	while (FindNextFile(h_find, &find_file_data) != 0);

	FindClose(h_find);

	return paths;
}