/* nag_dge_load (f16qhc) Example Program.
 *
 * Copyright 2005 Numerical Algorithms Group.
 *
 * Mark 8, 2005.
 */

#include <stdio.h>
#include <nag.h>
#include <nag_stdlib.h>
#include <nagf16.h>
#include <nagx04.h>

int main(void)
{

  /* Scalars */
  double alpha, diag;
  Integer exit_status, m, n, pda;

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

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

#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);
  Vprintf( "nag_dge_load (f16qhc) Example Program Results\n\n");

  /* Skip heading in data file */
  Vscanf("%*[^\n] ");
  /* Read the problem dimensions */
  Vscanf("%ld%ld%*[^\n] ", &m, &n);
  /* Read scalar parameters */
  Vscanf("%lf%lf%*[^\n] ", &alpha, &diag);

  if (order == Nag_ColMajor)
    pda = m;
  else
    pda = n;

  if (m > 0 && n > 0)
    {

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

  /* nag_dge_load(f16qhc).
   * General matrix initialisation.
   * 
   */
  nag_dge_load(order, m, n, alpha, diag, a, pda, &fail);
  if (fail.code != NE_NOERROR)
    {
      Vprintf("Error from dge_load.\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }

  /* Print output */
  /* nag_gen_real_mat_print (x04cac).
   * Print real general matrix (easy-to-use) 
   */
  nag_gen_real_mat_print(order, Nag_GeneralMatrix, Nag_NonUnitDiag, 
			 m, n, a, pda, "Matrix A", 0, &fail);
  if (fail.code != NE_NOERROR)
    {
      Vprintf("Error from nag_gen_real_mat_print (x04cac).\n%s\n",
	      fail.message);
      exit_status = 1;
      goto END;
    }

 END:
  if (a) NAG_FREE(a);

  return exit_status;
}