Function rdbSaveObject

src/rdb.cpp:822–1093

Save a Redis object. * Returns -1 on error, number of bytes written on success. */

/* Save a Redis object.
 * Returns -1 on error, number of bytes written on success. */
ssize_t rdbSaveObject(rio *rdb, robj_roptr o, robj_roptr key) {
    ssize_t n = 0, nwritten = 0;

    if (o->type == OBJ_STRING) {
        /* Save a string value */
        if ((n = rdbSaveStringObject(rdb,o)) == -1) return -1;
        nwritten += n;
    } else if (o->type == OBJ_LIST) {
        /* Save a list value */
        if (o->encoding == OBJ_ENCODING_QUICKLIST) {
            quicklist *ql = (quicklist*)ptrFromObj(o);
            quicklistNode *node = ql->head;

            if ((n = rdbSaveLen(rdb,ql->len)) == -1) return -1;
            nwritten += n;

            while(node) {
                if (quicklistNodeIsCompressed(node)) {
                    void *data;
                    size_t compress_len = quicklistGetLzf(node, &data);
                    if ((n = rdbSaveLzfBlob(rdb,data,compress_len,node->sz)) == -1) return -1;
                    nwritten += n;
                } else {
                    if ((n = rdbSaveRawString(rdb,node->zl,node->sz)) == -1) return -1;
                    nwritten += n;
                }
                node = node->next;
            }
        } else {
            serverPanic("Unknown list encoding");
        }
    } else if (o->type == OBJ_SET) {
        /* Save a set value */
        if (o->encoding == OBJ_ENCODING_HT) {
            dict *set = (dict*)ptrFromObj(o);
            dictIterator *di = dictGetIterator(set);
            dictEntry *de;

            if ((n = rdbSaveLen(rdb,dictSize(set))) == -1) {
                dictReleaseIterator(di);
                return -1;
            }
            nwritten += n;

            while((de = dictNext(di)) != NULL) {
                sds ele = (sds)dictGetKey(de);
                if ((n = rdbSaveRawString(rdb,(unsigned char*)ele,sdslen(ele)))
                    == -1)
                {
                    dictReleaseIterator(di);
                    return -1;
                }
                nwritten += n;
            }
            dictReleaseIterator(di);
        } else if (o->encoding == OBJ_ENCODING_INTSET) {
            size_t l = intsetBlobLen((intset*)ptrFromObj(o));