Function rioWriteHashIteratorCursor

app/redis-6.2.6/src/aof.c:1178–1196

Write either the key or the value of the currently selected item of a hash. * The 'hi' argument passes a valid Redis hash iterator. * The 'what' filed specifies if to write a key or a value and can be * either OBJ_HASH_KEY or OBJ_HASH_VALUE. * * The function returns 0 on error, non-zero on success. */

 *
 * The function returns 0 on error, non-zero on success. */
static int rioWriteHashIteratorCursor(rio *r, hashTypeIterator *hi, int what) {
    if (hi->encoding == OBJ_ENCODING_ZIPLIST) {
        unsigned char *vstr = NULL;
        unsigned int vlen = UINT_MAX;
        long long vll = LLONG_MAX;

        hashTypeCurrentFromZiplist(hi, what, &vstr, &vlen, &vll);
        if (vstr)
            return rioWriteBulkString(r, (char*)vstr, vlen);
        else
            return rioWriteBulkLongLong(r, vll);
    } else if (hi->encoding == OBJ_ENCODING_HT) {
        sds value = hashTypeCurrentFromHashTable(hi, what);
        return rioWriteBulkString(r, value, sdslen(value));
    }

    serverPanic("Unknown hash encoding");
    return 0;
}

/* Emit the commands needed to rebuild a hash object.
 * The function returns 0 on error, 1 on success. */