# include <fstream>
# include <string>

namespace webbur
{
  void binary_vector_next ( int n, int bvec[] );

  void ccn_compute ( int n, double x[], double w[] );
  void ccn_compute_np ( int n, int np, double p[], double x[], double w[] );
  void ccn_compute_points ( int n, double x[] );
  void ccn_compute_points_np ( int n, int np, double p[], double x[] );
  void ccn_compute_weights ( int n, double w[] );
  void ccn_compute_weights_np ( int n, int np, double p[], double w[] );

  void chebyshev1_compute ( int order, double x[], double w[] );
  void chebyshev1_compute_np ( int order, int np, double p[], double x[], double w[] );
  void chebyshev1_compute_points ( int order, double x[] );
  void chebyshev1_compute_points_np ( int order, int np, double p[], double x[] );
  void chebyshev1_compute_weights ( int order, double w[] );
  void chebyshev1_compute_weights_np ( int order, int np, double p[], double w[] );
  double chebyshev1_integral ( int expon );

  void chebyshev2_compute ( int order, double x[], double w[] );
  void chebyshev2_compute_np ( int order, int np, double p[], double x[], double w[] );
  void chebyshev2_compute_points ( int order, double x[] );
  void chebyshev2_compute_points_np ( int order, int np, double p[], double x[] );
  void chebyshev2_compute_weights ( int order, double w[] );
  void chebyshev2_compute_weights_np ( int order, int np, double p[], double w[] );
  double chebyshev2_integral ( int expon );

  void clenshaw_curtis_compute ( int order, double x[], double w[] );
  void clenshaw_curtis_compute_np ( int order, int np, double p[], double x[], double w[] );
  void clenshaw_curtis_compute_points ( int order, double x[] );
  void clenshaw_curtis_compute_points_np ( int order, int np, double p[], double x[] );
  void clenshaw_curtis_compute_weights ( int order, double w[] );
  void clenshaw_curtis_compute_weights_np ( int order, int np, double p[], double w[] );

  void comp_next ( int n, int k, int a[], bool *more, int *h, int *t );

  double cpu_time ( );

  void dif_deriv ( int nd, double xd[], double yd[], int *ndp, double xdp[], 
    double ydp[] );
  void dif_shift_x ( int nd, double xd[], double yd[], double xv );
  void dif_shift_zero ( int nd, double xd[], double yd[] );
  void dif_to_r8poly ( int nd, double xd[], double yd[], double c[] );

  void fejer2_compute ( int order, double x[], double w[] );
  void fejer2_compute_np ( int order, int np, double p[], double x[], double w[] );
  void fejer2_compute_points ( int order, double x[] );
  void fejer2_compute_points_np ( int order, int np, double p[], double x[] );
  void fejer2_compute_weights ( int order, double w[] );
  void fejer2_compute_weights_np ( int order, int np, double p[], double w[] );

  void gegenbauer_compute ( int order, double alpha, double x[], double w[] );
  void gegenbauer_compute_np ( int order, int np, double p[], double x[], double w[] );
  void gegenbauer_compute_points ( int order, double alpha, double x[] );
  void gegenbauer_compute_points_np ( int order, int np, double p[], double x[] );
  void gegenbauer_compute_weights ( int order, double alpha, double w[] );
  void gegenbauer_compute_weights_np ( int order, int np, double p[], double w[] );
  double gegenbauer_integral ( int expon, double alpha );
  void gegenbauer_recur ( double *p2, double *dp2, double *p1, double x,
    int order, double alpha, double c[] );
  void gegenbauer_root ( double *x, int order, double alpha,  double *dp2,
    double *p1, double c[] );

  void gen_hermite_compute ( int order, double alpha, double x[], double w[] );
  void gen_hermite_compute_np ( int order, int np, double p[], double x[], double w[] );
  void gen_hermite_compute_points ( int order, double alpha, double x[] );
  void gen_hermite_compute_points_np ( int order, int np, double p[], double x[] );
  void gen_hermite_compute_weights ( int order, double alpha, double w[] );
  void gen_hermite_compute_weights_np ( int order, int np, double p[], double w[] );
  void gen_hermite_dr_compute ( int order, double alpha, double x[], double w[] );
  double gen_hermite_integral ( int expon, double alpha );

  void gen_laguerre_compute ( int order, double alpha, double x[], double w[] );
  void gen_laguerre_compute_np ( int order, int np, double p[], double x[], double w[] );
  void gen_laguerre_compute_points ( int order, double alpha, double x[] );
  void gen_laguerre_compute_points_np ( int order, int np, double p[], double x[] );
  void gen_laguerre_compute_weights ( int order, double alpha, double w[] );
  void gen_laguerre_compute_weights_np ( int order, int np, double p[], double w[] );
  double gen_laguerre_integral ( int expon, double alpha );
  void gen_laguerre_ss_compute ( int order, double alpha, double x[], double w[] );
  void gen_laguerre_ss_recur ( double *p2, double *dp2, double *p1, double x,
    int order, double alpha, double b[], double c[] );
  void gen_laguerre_ss_root ( double *x, int order, double alpha, double *dp2,
    double *p1, double b[], double c[] );

  void hc_compute_weights_from_points ( int nhalf, double x[], double w[] );

  void hcc_compute ( int n, double x[], double w[] );
  void hcc_compute_np ( int n, int np, double p[], double x[], double w[] );
  void hcc_compute_points ( int n, double x[] );
  void hcc_compute_points_np ( int n, int np, double p[], double x[] );
  void hcc_compute_weights ( int n, double w[] );
  void hcc_compute_weights_np ( int n, int np, double p[], double w[] );

  void hce_compute ( int n, double x[], double w[] );
  void hce_compute_np ( int n, int np, double p[], double x[], double w[] );
  void hce_compute_points ( int n, double x[] );
  void hce_compute_points_np ( int n, int np, double p[], double x[] );
  void hce_compute_weights ( int n, double w[] );
  void hce_compute_weights_np ( int n, int np, double p[], double w[] );

  void hermite_compute ( int order, double x[], double w[] );
  void hermite_compute_np ( int order, int np, double p[], double x[], double w[] );
  void hermite_compute_points ( int order, double x[] );
  void hermite_compute_points_np ( int order, int np, double p[], double x[] );
  void hermite_compute_weights ( int order, double w[] );
  void hermite_compute_weights_np ( int order, int np, double p[], double w[] );

  void hermite_genz_keister_lookup ( int n, double x[], double w[] );
  void hermite_genz_keister_lookup_points ( int n, double x[] );
  void hermite_genz_keister_lookup_points_np ( int n, int np, double p[],
    double x[] );
  void hermite_genz_keister_lookup_weights ( int n, double w[] );
  void hermite_genz_keister_lookup_weights_np ( int n, int np, double p[],
    double w[] );

  void hermite_gk18_lookup_points ( int n, double x[] );
  void hermite_gk22_lookup_points ( int n, double x[] );
  void hermite_gk24_lookup_points ( int n, double x[] );

  double hermite_integral ( int n );

  void hermite_interpolant ( int n, double x[], double y[], double yp[], 
    double xd[], double yd[], double xdp[], double ydp[] );
  void hermite_interpolant_rule ( int n, double a, double b, double x[], double w[] );
  void hermite_interpolant_value ( int nd, double xd[], double yd[], double xdp[], 
    double ydp[], int nv, double xv[], double yv[], double yvp[] );

  void hermite_lookup ( int n, double x[], double w[] );
  void hermite_lookup_points ( int n, double x[] );
  void hermite_lookup_weights ( int n, double w[] );
  void hermite_ss_compute ( int order, double x[], double w[] );
  void hermite_ss_recur ( double *p2, double *dp2, double *p1, double x,
    int order );
  void hermite_ss_root ( double *x, int order, double *dp2, double *p1 );

  int i4_choose ( int n, int k );
  int i4_log_2 ( int i );
  int i4_max ( int i1, int i2 );
  int i4_min ( int i1, int i2 );
  int i4_power ( int i, int j );

  void i4mat_copy ( int m, int n, int a1[], int a2[] );
  int *i4mat_copy_new ( int m, int n, int a1[] );
  void i4mat_transpose_print ( int m, int n, int a[], std::string title );
  void i4mat_transpose_print_some ( int m, int n, int a[], int ilo, int jlo,
    int ihi, int jhi, std::string title );
  void i4mat_write ( std::string output_filename, int m, int n, int table[] );

  int *i4vec_add_new ( int n, int a[], int b[] );
  bool i4vec_any_lt ( int n, int a[], int b[] );
  void i4vec_copy ( int n, int a1[], int a2[] );
  int *i4vec_copy_new ( int n, int a1[] );
  void i4vec_min_mv ( int m, int n, int u[], int v[], int w[] );
  void i4vec_print ( int n, int a[], std::string title );
  int i4vec_product ( int n, int a[] );
  int i4vec_sum ( int n, int a[] );
  void i4vec_zero ( int n, int a[] );
  int *i4vec_zero_new ( int n );

  void imtqlx ( int n, double d[], double e[], double z[] );

  void jacobi_compute ( int order, double alpha, double beta, double x[],
    double w[] );
  void jacobi_compute_np ( int order, int np, double p[], double x[], double w[] );
  void jacobi_compute_points ( int order, double alpha, double beta,
    double x[] );
  void jacobi_compute_points_np ( int order, int np, double p[], double x[] );
  void jacobi_compute_weights ( int order, double alpha, double beta,
    double w[] );
  void jacobi_compute_weights_np ( int order, int np, double p[], double w[] );
  double jacobi_integral ( int expon, double alpha, double beta );
  void jacobi_ss_compute ( int order, double alpha, double beta, double x[],
    double w[] );
  void jacobi_ss_recur ( double *p2, double *dp2, double *p1, double x, int order,
    double alpha, double beta, double b[], double c[] );
  void jacobi_ss_root ( double *x, int order, double alpha, double beta,
    double *dp2, double *p1, double b[], double c[] );

  void laguerre_compute ( int n, double x[], double w[] );
  void laguerre_compute_np ( int order, int np, double p[], double x[], double w[] );
  void laguerre_compute_points ( int order, double x[] );
  void laguerre_compute_points_np ( int order, int np, double p[], double x[] );
  void laguerre_compute_weights ( int order, double w[] );
  void laguerre_compute_weights_np ( int order, int np, double p[], double w[] );
  double laguerre_integral ( int expon );
  void laguerre_lookup ( int n, double x[], double w[] );
  void laguerre_lookup_points ( int n, double x[] );
  void laguerre_lookup_weights ( int n, double w[] );
  void laguerre_ss_compute ( int order, double x[], double w[] );
  void laguerre_ss_recur ( double *p2, double *dp2, double *p1, double x,
    int order, double b[], double c[] );
  void laguerre_ss_root ( double *x, int order, double *dp2, double *p1,
    double b[], double c[] );

  void legendre_compute ( int n, double x[], double w[] );
  void legendre_compute_np ( int order, int np, double p[], double x[], double w[] );
  void legendre_compute_points ( int order, double x[] );
  void legendre_compute_points_np ( int order, int np, double p[], double x[] );
  void legendre_compute_weights ( int order, double w[] );
  void legendre_compute_weights_np ( int order, int np, double p[], double w[] );
  void legendre_dr_compute ( int order, double x[], double w[] );
  double legendre_integral ( int expon );
  void legendre_lookup ( int n, double x[], double w[] );
  void legendre_lookup_points ( int n, double x[] );
  void legendre_lookup_weights ( int n, double w[] );
  double *legendre_zeros ( int order );
//
//  Old style level-to-order functions.
//
  void level_growth_to_order ( int dim_num, int level[], int rule[], int growth[],
    int order[] );
  void level_to_order_default ( int dim_num, int level[], int rule[],
    int order[] );
  void level_to_order_exponential ( int dim_num, int level[], int rule[],
    int order[] );
  void level_to_order_exponential_slow ( int dim_num, int level[], int rule[],
    int order[] );
  void level_to_order_linear ( int dim_num, int level[], int rule[],
    int order[] );
//
//  New level-to-order functions.
//
  int level_to_order_exp_cc ( int level, int growth );
  int level_to_order_exp_f2 ( int level, int growth );
  int level_to_order_exp_gauss ( int level, int growth );
  int level_to_order_exp_gp ( int level, int growth );
  int level_to_order_exp_hgk ( int level, int growth );
  int level_to_order_linear_nn ( int level, int growth );
  int level_to_order_linear_wn ( int level, int growth );

  void nc_compute ( int n, double x_min, double x_max, double x[], double w[] );
  double *nc_compute_new ( int n, double x_min, double x_max, double x[] );

  void ncc_compute_points ( int n, double x[] );
  void ncc_compute_weights ( int n, double w[] );

  void nco_compute_points ( int n, double x[] );
  void nco_compute_weights ( int n, double w[] );

  void ncoh_compute_points ( int n, double x[] );
  void ncoh_compute_weights ( int n, double w[] );

  void patterson_lookup ( int n, double x[], double w[] );
  void patterson_lookup_points ( int n, double x[] );
  void patterson_lookup_points_np ( int n, int np, double p[], double x[] );
  void patterson_lookup_weights ( int n, double w[] );
  void patterson_lookup_weights_np ( int n, int np, double p[], double w[] );

  int point_radial_tol_unique_count ( int m, int n, double a[], double tol,
    int *seed );
  void point_radial_tol_unique_count_inc1 ( int m, int n1, double a1[],
    double tol, int *seed, double z[], double r1[], int indx1[], bool unique1[],
    int *unique_num1 );
  void point_radial_tol_unique_count_inc2 ( int m, int n1, double a1[], int n2,
    double a2[], double tol, double z[], double r1[], int indx1[], bool unique1[],
    int *unique_num2 );
  int point_radial_tol_unique_index ( int m, int n, double a[], double tol,
    int *seed, int undx[], int xdnu[] );
  void point_radial_tol_unique_index_inc1 ( int m, int n1, double a1[],
    double tol, int *seed, double z[], double r1[], int indx1[], bool unique1[],
    int *unique_num1, int undx1[], int xdnu1[] );
  void point_radial_tol_unique_index_inc2 ( int m, int n1, double a1[], int n2,
    double a2[], double tol, double z[], double r1[], int indx1[], bool unique1[],
    int unique_num1, int undx1[], int xdnu1[], double r2[],
    int indx2[], bool unique2[], int *unique_num2, int undx2[], int xdnu2[] );
  void point_radial_tol_unique_index_inc3 ( int m, int n1, double a1[],
    double r1[], int indx1[], bool unique1[], int unique_num1, int undx1[],
    int xdnu1[], int n2, double a2[], double r2[], int indx2[], bool unique2[],
    int unique_num2, int undx2[], int xdnu2[], int *n3, double a3[], double r3[],
    int indx3[], bool unique3[], int *unique_num3, int undx3[], int xdnu3[] );

  void point_unique_index ( int m, int n, double a[], int unique_num, int undx[],
    int xdnu[] );

  void product_mixed_weight ( int dim_num, int order_1d[], int order_nd,
    int rule[], double alpha[], double beta[], double weight_nd[] );

  double r8_abs ( double x );
  double r8_ceiling ( double x );
  double r8_choose ( int n, int k );
  double r8_epsilon ( );
  double r8_factorial ( int n );
  double r8_factorial2 ( int n );
  double r8_floor ( double x );
  double r8_gamma ( double x );
  double r8_huge ( );
  double r8_hyper_2f1 ( double a, double b, double c, double x );
  double r8_max ( double x, double y );
  double r8_min ( double x, double y );
  double r8_mop ( int i );
  double r8_psi ( double xx );
  double r8_sign ( double x );

  int r8col_compare ( int m, int n, double a[], int i, int j );
  void r8col_sort_heap_a ( int m, int n, double a[] );
  int *r8col_sort_heap_index_a ( int m, int n, double a[] );
  int r8col_sorted_unique_count ( int m, int n, double a[], double tol );
  void r8col_swap ( int m, int n, double a[], int j1, int j2 );
  void r8col_tol_undex ( int x_dim, int x_num, double x_val[], int x_unique_num,
    double tol, int undx[], int xdnu[] );
  int r8col_tol_unique_count ( int m, int n, double a[], double tol );
  void r8col_undex ( int x_dim, int x_num, double x_val[], int x_unique_num,
    double tol, int undx[], int xdnu[] );
  void r8col_unique_index ( int m, int n, double a[], double tol,
    int unique_index[] );

  void r8mat_transpose_print ( int m, int n, double a[], std::string title );
  void r8mat_transpose_print_some ( int m, int n, double a[], int ilo, int jlo,
    int ihi, int jhi, std::string title );
  void r8mat_write ( std::string output_filename, int m, int n, double table[] );

  double r8poly_ant_val ( int n, double poly_cof[], double xval );

  double *r8vec_chebyshev_new ( int n, double a_first, double a_last );
  int r8vec_compare ( int n, double a[], double b[] );
  void r8vec_copy ( int n, double a1[], double a2[] );
  double *r8vec_copy_new ( int n, double a1[] );
  double r8vec_diff_norm_li ( int n, double a[], double b[] );
  void r8vec_direct_product2 ( int factor_index, int factor_order,
    double factor_value[], int factor_num, int point_num, double w[] );
  double r8vec_dot_product ( int n, double a1[], double a2[] );
  double r8vec_i4vec_dot_product ( int n, double r8vec[], int i4vec[] );
  void r8vec_index_sorted_range ( int n, double r[], int indx[], double r_lo,
    double r_hi, int *i_lo, int *i_hi );
  void r8vec_indexed_heap_d ( int n, double a[], int indx[] );
  int r8vec_indexed_heap_d_extract ( int *n, double a[], int indx[] );
  void r8vec_indexed_heap_d_insert ( int *n, double a[], int indx[],
    int indx_insert );
  int r8vec_indexed_heap_d_max ( int n, double a[], int indx[] );
  double *r8vec_legendre_new ( int n, double a_first, double a_last );
  double *r8vec_linspace_new ( int n, double a_first, double a_last );
  double r8vec_min ( int n, double r8vec[] );
  double r8vec_min_pos ( int n, double a[] );
  void r8vec_print ( int n, double a[], std::string title );
  void r8vec_scale ( double s, int n, double a[] );
  void r8vec_sort_heap_index_a ( int n, double a[], int indx[] );
  int *r8vec_sort_heap_index_a_new ( int n, double a[] );
  void r8vec_stutter ( int n, double a[], int m, double am[] );
  double r8vec_sum ( int n, double a[] );
  void r8vec_uniform_01 ( int n, int *seed, double r[] );
  double *r8vec_uniform_01_new ( int n, int *seed );
  void r8vec_zero ( int n, double a[] );

  void sort_heap_external ( int n, int *indx, int *i, int *j, int isgn );

  void timestamp ( );

  void vec_colex_next3 ( int dim_num, int base[], int a[], bool *more );
}