/* nag_sum_fft_sine (c06rec) Example Program.
 *
 * Copyright 2014 Numerical Algorithms Group.
 *
 * Mark 24, 2013.
 */

#include <nag.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <nagc06.h>

int main(void)
{
  /* Scalars */
  Integer  exit_status = 0, j, m, n, n1;
  /* Arrays */
  double   *x = 0;
  char     title[60];
  /* Nag Types */
  NagError fail;

  INIT_FAIL(fail);

  printf("nag_sum_fft_sine (c06rec) Example Program Results\n");
  fflush(stdout);

  /* Read dimensions of array from data file. */
  scanf("%*[^\n] %" NAG_IFMT "%" NAG_IFMT "%*[^\n]", &m, &n1);

  n = n1 + 1;

  if (!(x = NAG_ALLOC((m * n1), double)))
    {
      printf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }

  /* Read array values from data file and print out. */
  for (j = 0; j < m*n1; j++)
    scanf("%lf", &x[j]);
  sprintf(title, "\n Original data values\n");
  nag_gen_real_mat_print_comp(Nag_RowMajor, Nag_GeneralMatrix,
                              Nag_NonUnitDiag, m, n1, x, n1, "%9.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels,
                              0, 80, 0, NULL, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_gen_real_mat_print_comp (x04cbc).\n%s\n",
             fail.message);
      exit_status = 1;
      goto END;
    }

  /* nag_sum_fft_sine (c06rec).
   * Discrete sine transforms
   */
  nag_sum_fft_sine(m, n, x, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_sum_fft_sine (c06rec).\n%s\n",
             fail.message);
      exit_status = 2;
      goto END;
    }
  sprintf(title, "\n Discrete Fourier sine transforms\n");
  nag_gen_real_mat_print_comp(Nag_RowMajor, Nag_GeneralMatrix,
                              Nag_NonUnitDiag, m, n1, x, n1, "%9.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels,
                              0, 80, 0, NULL, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_gen_real_mat_print_comp (x04cbc).\n%s\n",
             fail.message);
      exit_status = 3;
      goto END;
    }

  /* Two consecutive calls should restore the original data. */
  nag_sum_fft_sine(m, n, x, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_sum_fft_sine (c06rec).\n%s\n",
             fail.message);
      exit_status = 4;
      goto END;
    }
  sprintf(title, "\n Original data as restored by inverse transform\n");
  nag_gen_real_mat_print_comp(Nag_RowMajor, Nag_GeneralMatrix,
                              Nag_NonUnitDiag, m, n1, x, n1, "%9.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels,
                              0, 80, 0, NULL, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_gen_real_mat_print_comp (x04cbc).\n%s\n",
             fail.message);
      exit_status = 5;
      goto END;
    }

 END:
  NAG_FREE(x);
  return exit_status;
}