Function hashTypeExists

src/t_hash.cpp:172–185

Test if the specified field exists in the given hash. Returns 1 if the field * exists, and 0 when it doesn't. */

/* Test if the specified field exists in the given hash. Returns 1 if the field
 * exists, and 0 when it doesn't. */
int hashTypeExists(robj_roptr o, const char *field) {
    if (o->encoding == OBJ_ENCODING_ZIPLIST) {
        const unsigned char *vstr = NULL;
        unsigned int vlen = UINT_MAX;
        long long vll = LLONG_MAX;

        if (hashTypeGetFromZiplist(o, field, &vstr, &vlen, &vll) == 0) return 1;
    } else if (o->encoding == OBJ_ENCODING_HT) {
        if (hashTypeGetFromHashTable(o, field) != NULL) return 1;
    } else {
        serverPanic("Unknown hash encoding");
    }
    return 0;
}

/* Add a new field, overwrite the old with the new value if it already exists.
 * Return 0 on insert and 1 on update.