/* nag_blast_dge_copy (f16qfc) Example Program.
 *
 * Copyright 2024 Numerical Algorithms Group.
 *
 * Mark 30.2, 2024.
 */

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

int main(void) {

  /* Scalars */
  Integer bdim1, bdim2, exit_status, i, j, m, n, pda, pdb;

  /* Arrays */
  double *a = 0, *b = 0;
  char nag_enum_arg[40];

  /* Nag Types */
  NagError fail;
  Nag_OrderType order;
  Nag_TransType trans;

#ifdef NAG_COLUMN_MAJOR
#define A(I, J) a[(J - 1) * pda + I - 1]
  order = Nag_ColMajor;
#else
#define A(I, J) a[(I - 1) * pda + J - 1]
  order = Nag_RowMajor;
#endif

  exit_status = 0;
  INIT_FAIL(fail);

  printf("nag_blast_dge_copy (f16qfc) Example Program Results\n\n");

  /* Skip heading in data file */
  scanf("%*[^\n] ");
  /* Read the problem dimensions */
  scanf("%" NAG_IFMT "%" NAG_IFMT "%*[^\n] ", &m, &n);
  /* Read trans */
  scanf("%39s%*[^\n] ", nag_enum_arg);
  /* nag_enum_name_to_value (x04nac).
   * Converts NAG enum member name to value
   */
  trans = (Nag_TransType)nag_enum_name_to_value(nag_enum_arg);

  if (order == Nag_ColMajor) {
    pda = m;
    if (trans == Nag_NoTrans) {
      pdb = m;
      bdim1 = pdb;
      bdim2 = n;
    } else {
      pdb = n;
      bdim1 = pdb;
      bdim2 = m;
    }
  } else {
    pda = n;
    if (trans == Nag_NoTrans) {
      pdb = n;
      bdim1 = m;
      bdim2 = pdb;
    } else {
      pdb = m;
      bdim1 = n;
      bdim2 = pdb;
    }
  }

  if (m > 0 && n > 0) {
    /* Allocate memory */
    if (!(a = NAG_ALLOC(m * n, double)) || !(b = NAG_ALLOC(m * n, double))) {
      printf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }
  } else {
    printf("Invalid m or n\n");
    exit_status = 1;
    return exit_status;
  }

  /* Read A from data file */
  for (i = 1; i <= m; ++i) {
    for (j = 1; j <= n; ++j)
      scanf("%lf", &A(i, j));
  }
  scanf("%*[^\n] ");

  /* nag_blast_dge_copy (f16qfc).
   * General matrix copy.
   *
   */
  nag_blast_dge_copy(order, trans, m, n, a, pda, b, pdb, &fail);
  if (fail.code != NE_NOERROR) {
    printf("Error from nag_blast_dge_copy (f16qfc).\n%s\n", fail.message);
    exit_status = 1;
    goto END;
  }

  /* Print output */
  /* nag_file_print_matrix_real_gen (x04cac).
   * Print real general matrix (easy-to-use)
   */
  fflush(stdout);
  nag_file_print_matrix_real_gen(order, Nag_GeneralMatrix, Nag_NonUnitDiag,
                                 bdim1, bdim2, b, pdb, "Copy of Input Matrix",
                                 0, &fail);
  if (fail.code != NE_NOERROR) {
    printf("Error from nag_file_print_matrix_real_gen (x04cac).\n%s\n",
           fail.message);
    exit_status = 1;
    goto END;
  }

END:
  NAG_FREE(a);
  NAG_FREE(b);

  return exit_status;
}