Method readdir

libraries/AP_Filesystem/AP_Filesystem.cpp:230–264

}

struct dirent *AP_Filesystem::readdir(DirHandle *dirp)
{
    if (!dirp) {
        return nullptr;
    }
    const Backend &backend = backends[dirp->fs_index];
    struct dirent * ret = backend.fs.readdir(dirp->dir);
    if (ret != nullptr) {
        return ret;
    }

    // virtual directory entries in the root directory (e.g. @SYS, @MISSION)
    for (; ret == nullptr && virtual_dirent.backend_ofs < ARRAY_SIZE(AP_Filesystem::backends); virtual_dirent.backend_ofs++) {
        const char *prefix = backends[virtual_dirent.backend_ofs].prefix;
        if (prefix == nullptr) {
            continue;
        }
        if (prefix[0] != '@') {
            continue;
        }

        // only return @ entries in root if we can successfully opendir them:
        auto *d = backends[virtual_dirent.backend_ofs].fs.opendir("");
        if (d == nullptr) {
            continue;
        }
        backends[virtual_dirent.backend_ofs].fs.closedir(d);

        // found a virtual directory we haven't returned yet
        strncpy_noterm(virtual_dirent.de.d_name, prefix, sizeof(virtual_dirent.de.d_name));
        virtual_dirent.d_off++;
        ret = &virtual_dirent.de;
    }
    return ret;
}

int AP_Filesystem::closedir(DirHandle *dirp)
{