/*
    Copyright (C) 2011 Fredrik Johansson
    Copyright (C) 2014 Abhinav Baid

    This file is part of FLINT.

    FLINT is free software: you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License (LGPL) as published
    by the Free Software Foundation; either version 2.1 of the License, or
    (at your option) any later version.  See <https://www.gnu.org/licenses/>.
*/

#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "d_mat.h"
#include "ulong_extras.h"

int
main(void)
{
    slong m, n, i, j, rep;
    FLINT_TEST_INIT(state);

    flint_printf("one....");
    fflush(stdout);

    /* check if diagonal elements are one and off diagonal elements are
       zero */
    for (rep = 0; rep < 100 * flint_test_multiplier(); rep++)
    {
        d_mat_t A;

        m = n_randint(state, 20);
        n = n_randint(state, 20);

        d_mat_init(A, m, n);

        d_mat_randtest(A, state, 0, 0);
        d_mat_one(A);

        for (i = 0; i < m; i++)
        {
            for (j = 0; j < n; j++)
            {
                if (i == j && d_mat_entry(A, i, j) != 1)
                {
                    flint_printf("FAIL: entry not one\n");
                    abort();
                }
                else if (i != j && d_mat_entry(A, i, j) != 0)
                {
                    flint_printf("FAIL: entry not zero\n");
                    abort();
                }
            }
        }

        d_mat_clear(A);
    }

    FLINT_TEST_CLEANUP(state);

    flint_printf("PASS\n");
    return 0;
}