void cisi ( double x, double *ci, double *si );
double sincn_antideriv ( double x );
double sincn_deriv2 ( double x );
double sincn_deriv ( double x );
double sincn_fun ( double x );
double sincu_antideriv ( double x );
double sincu_deriv2 ( double x );
double sincu_deriv ( double x );
double sincu_fun ( double x );