Here’s what I use:
/* Returns a list of files in a directory (except the ones that begin with a dot) */
void GetFilesInDirectory(std::vector<string> &out, const string &directory)
{
#ifdef WINDOWS
HANDLE dir;
WIN32_FIND_DATA file_data;
if ((dir = FindFirstFile((directory + "/*").c_str(), &file_data)) == INVALID_HANDLE_VALUE)
return; /* No files found */
do {
const string file_name = file_data.cFileName;
const string full_file_name = directory + "https://stackoverflow.com/" + file_name;
const bool is_directory = (file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
if (file_name[0] == '.')
continue;
if (is_directory)
continue;
out.push_back(full_file_name);
} while (FindNextFile(dir, &file_data));
FindClose(dir);
#else
DIR *dir;
class dirent *ent;
class stat st;
dir = opendir(directory);
while ((ent = readdir(dir)) != NULL) {
const string file_name = ent->d_name;
const string full_file_name = directory + "https://stackoverflow.com/" + file_name;
if (file_name[0] == '.')
continue;
if (stat(full_file_name.c_str(), &st) == -1)
continue;
const bool is_directory = (st.st_mode & S_IFDIR) != 0;
if (is_directory)
continue;
out.push_back(full_file_name);
}
closedir(dir);
#endif
} // GetFilesInDirectory