double C_quadformConditionalPvalue(const double tstat, const double df);

double C_maxabsConditionalPvalue(const double tstat, const double *Sigma, const int pq,

                                 int *maxpts, double *releps, double *abseps, double *tol);

void C_MonteCarlo(double *pvalues, SEXP learnsample, SEXP weights,

                  SEXP fitmem, SEXP varctrl, SEXP gtctrl, double *ans);