Function fetchFromKey

src/t_nhash.cpp:89–124

};

robj *fetchFromKey(redisDb *db, robj_roptr key) {
    const char *pchCur = szFromObj(key);
    const char *pchStart = pchCur;
    const char *pchMax = pchCur + sdslen(pchCur);
    robj *o = nullptr;

    while (pchCur <= pchMax) {
        if (pchCur == pchMax || *pchCur == '.') {
            // WARNING: Don't deref pchCur as it may be pchMax

            // New word
            if ((pchCur - pchStart) < 1) {
                throw shared.syntaxerr; // malformed
            }

            DbDictWrapper srcDb;
            if (o == nullptr)
                srcDb = db;
            else
                srcDb = (dict*)ptrFromObj(o);
            
            sdsstring str(pchStart, pchCur - pchStart);
            o = srcDb.find(str.get()).val();

            if (o == nullptr) throw shared.nokeyerr;   // Not Found
            serverAssert(o->type == OBJ_NESTEDHASH || o->type == OBJ_STRING || o->type == OBJ_LIST);
            if (o->type == OBJ_STRING && pchCur != pchMax)
                throw shared.nokeyerr; // Past the end

            pchStart = pchCur + 1;
        }
        ++pchCur;
    }

    return o;
}

// Returns one if we overwrote a value
bool setWithKey(redisDb *db, robj_roptr key, robj *val, bool fCreateBuckets) {