make_rule()

static rule* make_rule ( size_t  sz, unsigned  dim, unsigned  fdim, unsigned  num_points, evalError_func  evalError, destroy_func  destroy  )

static

{
     rule *r;

     if (sz < sizeof(rule)) return NULL;
     r = (rule *) malloc(sz);
     if (!r) return NULL;
     r->pts = r->vals = NULL;
     r->num_regions = 0;
     r->dim = dim; r->fdim = fdim; r->num_points = num_points;
     r->evalError = evalError;
     r->destroy = destroy;
     return r;
}