pqc/external/flint-2.4.3/fq_poly_templates/test/t-hamming_weight.c

/*=============================================================================

    This file is part of FLINT.

    FLINT 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; either version 2 of the License, or
    (at your option) any later version.

    FLINT 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 FLINT; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

=============================================================================*/
/******************************************************************************

    Copyright (C) 2012 Sebastian Pancratz 
    Copyright (C) 2012 Andres Goens
    Copyright (C) 2013 Mike Hansen

******************************************************************************/


#ifdef T

#include "templates.h"

#include <stdio.h>
#include <stdlib.h>

#include "ulong_extras.h"
#include "long_extras.h"

int
main(void)
{
    int i, result;
    FLINT_TEST_INIT(state);

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

    /* Check consistency */
    for (i = 0; i < 2000; i++)
    {
        slong len;
        TEMPLATE(T, ctx_t) ctx;
        slong w1, w2;
        TEMPLATE(T, poly_t) a, b;

        len = n_randint(state, 15) + 1;
        TEMPLATE(T, ctx_randtest) (ctx, state);
        TEMPLATE(T, poly_init) (a, ctx);
        TEMPLATE(T, poly_init) (b, ctx);

        TEMPLATE(T, poly_randtest) (a, state, len, ctx);
        TEMPLATE(T, poly_set) (b, a, ctx);

        w1 = TEMPLATE(T, poly_hamming_weight) (a, ctx);
        w2 = TEMPLATE(T, poly_hamming_weight) (b, ctx);

        result = (w1 == w2);
        if (!result)
        {
            flint_printf("FAIL:\n\n");
            flint_printf("a = "), TEMPLATE(T, poly_print_pretty) (a, "X", ctx),
                flint_printf("\n");
            flint_printf("b = "), TEMPLATE(T, poly_print_pretty) (b, "X", ctx),
                flint_printf("\n");
            flint_printf("w1 = %wd \n w2 = %wd \n", w1, w2);
            abort();
        }

        TEMPLATE(T, poly_clear) (a, ctx);
        TEMPLATE(T, poly_clear) (b, ctx);


        TEMPLATE(T, ctx_clear) (ctx);
    }

    /* Check that wt(a+b) \leq wt(a) + wt(b) */
    for (i = 0; i < 2000; i++)
    {
        slong len;
        TEMPLATE(T, ctx_t) ctx;
        slong w1, w2, wsum;
        TEMPLATE(T, poly_t) a, b, c;

        len = n_randint(state, 15) + 1;
        TEMPLATE(T, ctx_randtest) (ctx, state);
        TEMPLATE(T, poly_init) (a, ctx);
        TEMPLATE(T, poly_init) (b, ctx);
        TEMPLATE(T, poly_init) (c, ctx);

        TEMPLATE(T, poly_randtest) (a, state, len, ctx);
        TEMPLATE(T, poly_randtest) (b, state, len, ctx);
        TEMPLATE(T, poly_add) (c, a, b, ctx);

        w1 = TEMPLATE(T, poly_hamming_weight) (a, ctx);
        w2 = TEMPLATE(T, poly_hamming_weight) (b, ctx);
        wsum = TEMPLATE(T, poly_hamming_weight) (c, ctx);

        result = (wsum <= w1 + w2);
        if (!result)
        {
            flint_printf("FAIL:\n\n");
            flint_printf("a = "), TEMPLATE(T, poly_print_pretty) (a, "X", ctx),
                flint_printf("\n");
            flint_printf("b = "), TEMPLATE(T, poly_print_pretty) (b, "X", ctx),
                flint_printf("\n");
            flint_printf("w1 = %wd \n w2 = %wd \n wsum = %wd", w1, w2, wsum);
            abort();
        }

        TEMPLATE(T, poly_clear) (a, ctx);
        TEMPLATE(T, poly_clear) (b, ctx);
        TEMPLATE(T, poly_clear) (c, ctx);


        TEMPLATE(T, ctx_clear) (ctx);
    }

    FLINT_TEST_CLEANUP(state);
    flint_printf("PASS\n");
    return EXIT_SUCCESS;
}



#endif