/* nag_opt_sparse_mps_read (e04mzc) Example Program.
 *
 * Copyright 1998 Numerical Algorithms Group.
 *
 * Mark 5, 1998.
 * Mark 7 revised, 2001.
 * Mark 8 revised, 2004.
 *
 */

#include <nag.h>
#include <stdio.h>
#include <string.h>
#include <nag_stdlib.h>
#include <nag_string.h>
#include <nage04.h>
#include <nagx04.h>

#ifdef __cplusplus
extern "C" {
#endif
static void NAG_CALL qphess(Integer ncolh, double x[], double hx[],
                            Nag_Comm *comm);
#ifdef __cplusplus
}
#endif

int main(int argc, char *argv[])
{
  FILE        *fpin, *fpout;
  char        *infile, *outfile;
  Integer     exit_status = 0;
  Integer     *ha, iobj, *ka, m, n, ncolh, ninf, nnz;
  Nag_E04_Opt options;
  double      *a, *bl, *bu, obj, sinf, *xs;
  NagError    fail;

  INIT_FAIL(fail);

  /* Check for command-line IO options */
  fpin = nag_example_file_io(argc, argv, "-data", NULL);
  (void) nag_example_file_io(argc, argv, "-nag_read", &infile);
  fpout = nag_example_file_io(argc, argv, "-results", NULL);
  (void) nag_example_file_io(argc, argv, "-nag_write", &outfile);
  if (!outfile)
    {
      outfile = NAG_ALLOC(7, char);
      strcpy(outfile, "stdout");
    }


  fprintf(fpout, "nag_opt_sparse_mps_read (e04mzc) Example Program Results\n");
  /* Initialise the options structure and read MPSX data */
  /* nag_opt_init (e04xxc).
   * Initialization function for option setting
   */
  nag_opt_init(&options);
  strcpy(options.outfile, outfile);
  Vstrcpy(options.prob_name, "..QP 2..");
  Vstrcpy(options.obj_name, "..COST..");
  /* nag_opt_sparse_mps_read (e04mzc), see above. */
  if (strcmp(outfile, "stdout"))
    fclose(fpout);
  nag_opt_sparse_mps_read(infile, &n, &m, &nnz, &iobj, &a, &ha, &ka, &bl, &bu,
                          &xs, &options, &fail);
  if (strcmp(outfile, "stdout"))
    {
      fpout = fopen(outfile, "a");
    }
  if (fail.code != NE_NOERROR)
    {
      fprintf(fpout, "Error from nag_opt_sparse_mps_read (e04mzc).\n%s\n",
              fail.message);
      exit_status = 1;
      goto END;
    }

  /* Column and row names are now available via options */

  ncolh = 5;
  /* nag_opt_sparse_convex_qp (e04nkc), see above. */
  if (strcmp(outfile, "stdout"))
    fclose(fpout);
  nag_opt_sparse_convex_qp(n, m, nnz, iobj, ncolh, qphess, a, ha, ka, bl, bu,
                           xs, &ninf, &sinf, &obj, &options, NAGCOMM_NULL,
                           &fail);
  if (strcmp(outfile, "stdout"))
    {
      fpout = fopen(outfile, "a");
    }
  if (fail.code != NE_NOERROR)
    {
      fprintf(fpout, "Error from nag_opt_sparse_convex_qp (e04nkc).\n%s\n",
              fail.message);
      exit_status = 1;
    }

  /* Free memory returned by nag_opt_sparse_mps_read (e04mzc) */
  /* nag_opt_sparse_mps_free (e04myc), see above. */
  nag_opt_sparse_mps_free(&a, &ha, &ka, &bl, &bu, &xs);

  /* Free memory in options (including column & row names) */
  /* nag_opt_free (e04xzc).
   * Memory freeing function for use with option setting
   */
  nag_opt_free(&options, "all", &fail);
  if (fail.code != NE_NOERROR)
    {
      fprintf(fpout, "Error from nag_opt_free (e04xzc).\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }
 END:
  if (fpin != stdin) fclose(fpin);
  if (fpout != stdout) fclose(fpout);
  if (outfile) NAG_FREE(outfile);

  return exit_status;
}

static void NAG_CALL qphess(Integer ncolh, double x[], double hx[],
                            Nag_Comm *comm)
{
  /* Function to compute H*x. */
  hx[0] = 2.0*x[0] + x[1] + x[2] + x[3] + x[4];
  hx[1] = x[0] + 2.0*x[1] + x[2] + x[3] + x[4];
  hx[2] = x[0] + x[1] + 2.0*x[2] + x[3] + x[4];
  hx[3] = x[0] + x[1] + x[2] + 2.0*x[3] + x[4];
  hx[4] = x[0] + x[1] + x[2] + x[3] + 2.0*x[4];
}  /* qphess */