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 int
 saf_find_coords(SAF_ParMode pmode,              /* The parallel mode. */
                 SAF_Db *db,                     /* Database in which to limit the search. */
                 SAF_Set *base,                  /* The base space for which coordinate fields are desired. */
                 int *num,                       /* For this and the succeeding argument [see Returned Handles]. */
                 SAF_Field **found               /* For this and the preceding argument [see Returned Handles]. */
                 )
 {
     SAF_ENTER(saf_find_coords, SAF_PRECONDITION_ERROR);
     SAF_KEYMASK(SAF_Field, key, mask);
     size_t              nfound;
     ss_scope_t          scope;

     SAF_REQUIRE(_saf_valid_pmode(pmode), SAF_LOW_CHK_COST, SAF_PRECONDITION_ERROR,
                 _saf_errmsg("PMODE must be valid"));
     if (!_saf_is_participating_proc(pmode)) SAF_RETURN(-1);

     SAF_REQUIRE(SS_SET(base) || _saf_is_universe(base), SAF_LOW_CHK_COST, SAF_PRECONDITION_ERROR,
                 _saf_errmsg("BASE must be either a valid set handle or the universe set for all participating processes"));
     SAF_REQUIRE(_saf_valid_memhints(num, (void**)found), SAF_LOW_CHK_COST, SAF_PRECONDITION_ERROR,
                 _saf_errmsg("NUM and FOUND must be compatible for return value allocation"));

     ss_file_topscope(db, &scope);
     if (base && !_saf_is_universe(base)) SAF_SEARCH(SAF_Field, key, mask, base_space, *base);
     SAF_SEARCH(SAF_Field, key, mask, is_coord_field, TRUE);

     if (!found) {
         /* Count the matches */
         assert(num);
         nfound = SS_NOSIZE;
         ss_pers_find(&scope, (ss_pers_t*)key, mask_count?(ss_persobj_t*)&mask:NULL, 0, &nfound, SS_PERS_TEST, NULL);
         *num = nfound;
     } else if (!*found) {
         /* Find all matches; library allocates results */
         nfound = SS_NOSIZE;
         *found = (ss_field_t*)ss_pers_find(&scope, (ss_pers_t*)key, mask_count?(ss_persobj_t*)&mask:NULL, 0, &nfound, NULL, NULL);
         if (num) *num = nfound;
     } else {
         /* Find limited matches; client allocates result buffer */
         assert(num);
         nfound = *num;
         if (NULL==ss_pers_find(&scope, (ss_pers_t*)key, mask_count?(ss_persobj_t*)&mask:NULL, 0, &nfound, (ss_pers_t*)*found,
                                _SAF_GLOBALS.find_detect_overflow)) {
             SAF_ERROR(SAF_CONSTRAINT_ERROR, _saf_errmsg("found too many matchine objects"));
         }
         *num = nfound;
     }
     SAF_LEAVE(SAF_SUCCESS);
 }