Function rdbLoadMillisecondTime

app/redis-6.2.6/src/rdb.c:148–154

This function loads a time from the RDB file. It gets the version of the * RDB because, unfortunately, before Redis 5 (RDB version 9), the function * failed to convert data to/from little endian, so RDB files with keys having * expires could not be shared between big endian and little endian systems * (because the expire time will be totally wrong). The fix for this is just * to call memrev64

 * valid stored value, the caller should use rioGetReadError() to check for
 * errors after calling this function. */
long long rdbLoadMillisecondTime(rio *rdb, int rdbver) {
    int64_t t64;
    if (rioRead(rdb,&t64,8) == 0) return LLONG_MAX;
    if (rdbver >= 9) /* Check the top comment of this function. */
        memrev64ifbe(&t64); /* Convert in big endian if the system is BE. */
    return (long long)t64;
}

/* Saves an encoded length. The first two bits in the first byte are used to
 * hold the encoding type. See the RDB_* definitions for more information