pqc/external/flint-2.4.3/fq_poly_templates/test/t-deflate.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) 2011 Fredrik Johansson
    Copyright (C) 2013 Mike Hansen

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


#ifdef T

#include "templates.h"

int
main(void)
{
    int iter;
    FLINT_TEST_INIT(state);

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

    for (iter = 0; iter < 100 * flint_test_multiplier(); iter++)
    {
        TEMPLATE(T, poly_t) poly1, poly2, poly3;
        TEMPLATE(T, ctx_t) ctx;
        ulong infl1, infl, deflation;

        TEMPLATE(T, ctx_randtest) (ctx, state);

        TEMPLATE(T, poly_init) (poly1, ctx);
        TEMPLATE(T, poly_init) (poly2, ctx);
        TEMPLATE(T, poly_init) (poly3, ctx);

        TEMPLATE(T, poly_randtest) (poly1, state, n_randint(state, 15), ctx);

        if (TEMPLATE(T, poly_length) (poly1, ctx) <= 1)
        {
            if (TEMPLATE(T, poly_deflation) (poly1, ctx) !=
                TEMPLATE(T, poly_length) (poly1, ctx))
            {
                flint_printf
                    ("FAIL: wrong deflation for constant polynomial\n");
                abort();
            }

            TEMPLATE(T, poly_deflate) (poly2, poly1, n_randint(state, 5) + 1,
                                       ctx);
            if (!TEMPLATE(T, poly_equal) (poly2, poly1, ctx))
            {
                flint_printf
                    ("FAIL: constant polynomial changed on deflation\n");
                abort();
            }
        }
        else
        {

            infl = n_randint(state, 13) + 1;
            infl1 = TEMPLATE(T, poly_deflation) (poly1, ctx);

            TEMPLATE(T, poly_inflate) (poly2, poly1, infl, ctx);

            deflation = TEMPLATE(T, poly_deflation) (poly2, ctx);

            if (deflation != infl * infl1)
            {
                flint_printf("FAIL: deflation = %wu, inflation: %wu, %wu\n",
                             deflation, infl, infl1);
                flint_printf("poly1:\n");
                TEMPLATE(T, poly_print) (poly1, ctx);
                flint_printf("\n\n");
                flint_printf("poly2:\n");
                TEMPLATE(T, poly_print) (poly2, ctx);
                flint_printf("\n\n");
                abort();
            }

            TEMPLATE(T, poly_deflate) (poly3, poly2, infl, ctx);
            if (!TEMPLATE(T, poly_equal) (poly3, poly1, ctx))
            {
                flint_printf("FAIL: deflation = %wu, inflation: %wu, %wu\n",
                             deflation, infl, infl1);
                flint_printf("Deflated polynomial not equal to input:\n");
                flint_printf("poly1:\n");
                TEMPLATE(T, poly_print) (poly1, ctx);
                flint_printf("\n\n");
                flint_printf("poly2:\n");
                TEMPLATE(T, poly_print) (poly2, ctx);
                flint_printf("\n\n");
                flint_printf("poly3:\n");
                TEMPLATE(T, poly_print) (poly3, ctx);
                flint_printf("\n\n");
                abort();
            }

            TEMPLATE(T, poly_deflate) (poly2, poly2, infl, ctx);
            if (!TEMPLATE(T, poly_equal) (poly3, poly2, ctx))
            {
                flint_printf("FAIL: aliasing\n");
                abort();
            }
        }

        TEMPLATE(T, poly_clear) (poly1, ctx);
        TEMPLATE(T, poly_clear) (poly2, ctx);
        TEMPLATE(T, poly_clear) (poly3, ctx);
        TEMPLATE(T, ctx_clear) (ctx);
    }

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


#endif