test.c

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/*
 * This library comes with MBDyn (C), a multibody analysis code.
 * http://www.mbdyn.org
 *
 * Copyright (C) 1996-2017
 *
 * Pierangelo Masarati  <masarati@aero.polimi.it>
 *
 * Dipartimento di Ingegneria Aerospaziale - Politecnico di Milano
 * via La Masa, 34 - 20156 Milano, Italy
 * http://www.aero.polimi.it
 *
 * Changing this copyright notice is forbidden.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation (version 2 of the License).
 * 
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "mbconfig.h"

#include <stdlib.h>
#include <stdio.h>
#include "ac/f2c.h"

#include "y12lib.h"

#ifdef USE_Y12

int
main(void)
{
        const integer N = 2;    /* size */
        const integer Z = 3;    /* non-zeroes */

        const integer NN = 3*Z; /* size of A and SNR */
        doublereal A[9];        /* matrix NN = 3*Z */
        integer SNR[9];         /* column indices NN = 3*Z */

        const integer NN1 = 3*Z;/* size of RNR */
        integer RNR[9];         /* row indices NN1 = 3*Z */

        const integer IHA = N;  /* size of HA */
        integer HA[22];         /* work array IHA*11 */

        doublereal AFLAG[8];    /* ? */
        integer IFLAG[10];      /* ? */

        integer IFAIL = 0;      /* diagnostics */

        doublereal PIVOT[2];    /* pivot factors N */
        doublereal B[2];        /* RHS of problem N */

        A[0] = 2.;      /* 1, 1 */
        A[1] = 1.;      /* 2, 1 */
        A[2] = 1.;      /* 2, 2 */

        SNR[0] = 1;
        SNR[1] = 1;
        SNR[2] = 2;

        RNR[0] = 1;
        RNR[1] = 2;
        RNR[2] = 2;

        IFLAG[0] = 0;
        IFLAG[1] = 3;
        IFLAG[2] = 1;   /* total pivoting */
        IFLAG[3] = 0;
        IFLAG[4] = 2;

        __FC_DECL__(y12mbf)((integer *)&N, (integer *)&Z, A, SNR, 
                        (integer *)&NN, RNR, 
                        (integer *)&NN1, HA, (integer *)&IHA, AFLAG, IFLAG, 
                        &IFAIL);


        B[0] = 1.;
        B[1] = 1.;

        __FC_DECL__(y12mcf)((integer *)&N, (integer *)&Z, A, SNR, 
                        (integer *)&NN, RNR, 
                        (integer *)&NN1, PIVOT, B, HA, (integer *)&IHA, AFLAG, 
                        IFLAG, &IFAIL);

        __FC_DECL__(y12mdf)((integer *)&N, A, (integer *)&NN, B, PIVOT, SNR, 
                        HA, 
                        (integer *)&IHA, IFLAG, &IFAIL);

        fprintf(stdout, "B = {%e,%e}\n", B[0], B[1]);

        IFLAG[4] = 3;

        B[0] = 2.;
        B[1] = 2.;

        __FC_DECL__(y12mdf)((integer *)&N, A, (integer *)&NN, B, PIVOT, SNR, 
                        HA, 
                        (integer *)&IHA, IFLAG, &IFAIL);

        fprintf(stdout, "B = {%e,%e}\n", B[0], B[1]);

        B[0] = 2.;
        B[1] = -1.;

        __FC_DECL__(y12mdf)((integer *)&N, A, (integer *)&NN, B, PIVOT, SNR, 
                        HA, 
                        (integer *)&IHA, IFLAG, &IFAIL);

        fprintf(stdout, "B = {%e,%e}\n", B[0], B[1]);

        return 0;
}

#else /* ! USE_Y12 */

int
main(void)
{
        printf("configure --with-y12 to enable Y12\n");

        return 0;
}

#endif /* ! USE_Y12 */