mkmask
pool->relhashmask = hashmask = mkmask(pool->nrels + REL_BLOCK);
repo->lastidhash_mask = mkmask(size < REPO_ADDID_DEP_HASHMIN ? REPO_ADDID_DEP_HASHMIN : size);
hashmask = mkmask(spool->nstrings + numid);
if (hashmask > mkmask(spool->nstrings + 8192))
hashmask = mkmask(pool->nrels + numrel);
if (hashmask > mkmask(pool->nrels + 4096))
ss->stringhashmask = hashmask = mkmask(ss->nstrings + STRING_BLOCK);