/* nag_ip_mps_read (h02buc) Example Program.
 *
 * Copyright 1998 Numerical Algorithms Group.
 *
 * Mark 5, 1998.
 *
 * Mark 6 revised, 2000.
 * Mark 8 revised, 2004.
 */

#include <nag.h>
#include <stdio.h>
#include <string.h>
#include <nag_stdlib.h>
#include <nage04.h>
#include <nagh02.h>
#include <nagx04.h>

int main(int argc, char *argv[])
{
  FILE        *fpin, *fpout;
  char        *optionsfile;
  char        *infile, *outfile;
  Integer     exit_status = 0;
  Nag_Boolean *intvar;
  Integer     m, n;
  Nag_H02_Opt options;
  double      *a, *bl, *bu, *c, objf, *x;
  NagError    fail;

  INIT_FAIL(fail);

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

  fprintf(fpout, "nag_ip_mps_read (h02buc) Example Program Results\n");

  /* Initialise options structure and read option settings. */
  /* nag_ip_init (h02xxc).
   * Initialize option structure to null values
   */
  nag_ip_init(&options);
  strcpy(options.outfile, outfile);
  /* nag_ip_read (h02xyc).
   * Read optional parameter values from a file
   */
  if (strcmp(outfile, "stdout"))
    fclose(fpout);
  nag_ip_read("h02buc", optionsfile, &options, (Nag_Boolean) Nag_TRUE,
              options.outfile, &fail);
  if (strcmp(outfile, "stdout"))
    {
      fpout = fopen(outfile, "a");
    }
  if (fail.code != NE_NOERROR)
    {
      fprintf(fpout, "Error from nag_ip_read (h02xyc).\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }

  /* Read MPSX data */
  /* nag_ip_mps_read (h02buc), see above. */
  if (strcmp(outfile, "stdout"))
    fclose(fpout);
  nag_ip_mps_read(infile, Nag_TRUE, &n, &m, &a, &bl, &bu, &intvar, &c, &x,
                  &options, &fail);
  if (strcmp(outfile, "stdout"))
    {
      fpout = fopen(outfile, "a");
    }
  if (fail.code != NE_NOERROR)
    {
      fprintf(fpout, "Error from nag_ip_mps_read (h02buc).\n%s\n",
              fail.message);
      exit_status = 1;
      goto END;
    }

  /* Solve IP problem defined by data */
  options.list = Nag_TRUE;
  /* nag_ip_bb (h02bbc).
   * Solves integer programming problems using a branch and
   * bound method
   */
  if (strcmp(outfile, "stdout"))
    fclose(fpout);
  nag_ip_bb(n, m, a, n, bl, bu, intvar, c, (double *) 0, 0, NULLFN,
            x, &objf, &options, NAGCOMM_NULL, &fail);
  if (strcmp(outfile, "stdout"))
    {
      fpout = fopen(outfile, "a");
    }
  if (fail.code != NE_NOERROR)
    {
      fprintf(fpout, "Error from nag_ip_bb (h02bbc).\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }

  /* Free memory allocated by nag_ip_mps_read (h02buc) */
  /* nag_ip_mps_free (h02bvc), see above. */
  nag_ip_mps_free(&a, &bl, &bu, &intvar, &c, &x);

  /* Free options memory */
  /* nag_ip_free (h02xzc).
   * Free NAG allocated memory from option structures
   */
  nag_ip_free(&options, "all", &fail);
  if (fail.code != NE_NOERROR)
    {
      fprintf(fpout, "Error from nag_ip_free (h02xzc).\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }

 END:
  if (fpin != stdin) fclose(fpin);
  if (fpout != stdout) fclose(fpout);
  if (optionsfile) NAG_FREE(optionsfile);
  if (outfile) NAG_FREE(outfile);

  return exit_status;
}