/* Stores pointer to current the entry in the provided entry structure
* and advances the position of the iterator. Returns 1 when the current
* entry is in fact an entry, 0 otherwise. */
int listTypeNext(listTypeIterator *li, listTypeEntry *entry) {
/* Protect from converting when iterating */
serverAssert(li->subject->encoding == li->encoding);
entry->li = li;
if (li->encoding == OBJ_ENCODING_QUICKLIST) {
return quicklistNext(li->iter, &entry->entry);
} else {
serverPanic("Unknown list encoding");
}
return 0;
}
//将列表类型的迭代器指向的entry保存在提供的listTypeEntry结构中，并且更新迭代器，1表示成功，0失败
int listTypeNext(listTypeIterator *li, listTypeEntry *entry) {
/* Protect from converting when iterating */
//确保对象编码类型和迭代器中encoding成员相等
serverAssert(li->subject->encoding == li->encoding);
//设置listTypeEntry的entry成员关联到当前列表类型的迭代器
entry->li = li;
//对列表对象编码为quicklist类型操作
if (li->encoding == OBJ_ENCODING_QUICKLIST) {
//保存当前的entry到listTypeEntry的entry成员，并更新迭代器
return quicklistNext(li->iter, &entry->entry);
} else {
serverPanic("Unknown list encoding");
}
return 0;
}