Function quicklistGetIteratorAtIdx

src/quicklist.c:1095–1109

Initialize an iterator at a specific offset 'idx' and make the iterator * return nodes in 'direction' direction. */

/* Initialize an iterator at a specific offset 'idx' and make the iterator
 * return nodes in 'direction' direction. */
quicklistIter *quicklistGetIteratorAtIdx(const quicklist *quicklist,
                                         const int direction,
                                         const long long idx) {
    quicklistEntry entry;

    if (quicklistIndex(quicklist, idx, &entry)) {
        quicklistIter *base = quicklistGetIterator(quicklist, direction);
        base->zi = NULL;
        base->current = entry.node;
        base->offset = entry.offset;
        return base;
    } else {
        return NULL;
    }
}

/* Release iterator.
 * If we still have a valid current node, then re-encode current node. */