pqc/external/flint-2.4.3/padic_poly/test/t-compose_pow.c

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2014-05-18 22:03:37 +00:00
/*=============================================================================
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, 2012 Sebastian Pancratz
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "long_extras.h"
#include "ulong_extras.h"
#include "padic_poly.h"
int
main(void)
{
int i, result;
padic_ctx_t ctx;
fmpz_t p;
slong N;
FLINT_TEST_INIT(state);
flint_printf("compose_pow... ");
fflush(stdout);
/* Aliasing */
for (i = 0; i < 1000; i++)
{
padic_poly_t a, b, c;
slong k;
fmpz_init_set_ui(p, n_randtest_prime(state, 0));
N = n_randint(state, PADIC_TEST_PREC_MAX - PADIC_TEST_PREC_MIN)
+ PADIC_TEST_PREC_MIN;
padic_ctx_init(ctx, p, FLINT_MAX(0, N-10), FLINT_MAX(0, N+10), PADIC_SERIES);
padic_poly_init2(a, 0, N);
padic_poly_init2(b, 0, N);
padic_poly_init2(c, 0, N);
padic_poly_randtest(a, state, n_randint(state, 100), ctx);
padic_poly_set(b, a, ctx);
k = n_randint(state, 20) + 1;
padic_poly_compose_pow(c, b, k, ctx);
padic_poly_compose_pow(b, b, k, ctx);
result = (padic_poly_equal(b, c) && padic_poly_is_reduced(b, ctx));
if (!result)
{
flint_printf("FAIL (aliasing):\n");
padic_poly_print(a, ctx), flint_printf("\n\n");
padic_poly_print(b, ctx), flint_printf("\n\n");
padic_poly_print(c, ctx), flint_printf("\n\n");
abort();
}
padic_poly_clear(a);
padic_poly_clear(b);
padic_poly_clear(c);
padic_ctx_clear(ctx);
fmpz_clear(p);
}
/* Compare with usual composition */
for (i = 0; i < 1000; i++)
{
padic_poly_t f, g, h1, h2;
slong k;
padic_t one;
fmpz_init_set_ui(p, n_randtest_prime(state, 0));
N = n_randint(state, PADIC_TEST_PREC_MAX - PADIC_TEST_PREC_MIN)
+ PADIC_TEST_PREC_MIN;
padic_ctx_init(ctx, p, FLINT_MAX(0, N-10), FLINT_MAX(0, N+10), PADIC_SERIES);
padic_poly_init2(f, 0, N);
padic_poly_init2(g, 0, WORD_MAX); /* TODO: Check this is OK */
padic_poly_init2(h1, 0, N);
padic_poly_init2(h2, 0, N);
padic_poly_randtest(f, state, n_randint(state, 40), ctx);
k = n_randint(state, 20) + 1;
padic_poly_compose_pow(h1, f, k, ctx);
padic_init(one);
padic_one(one);
padic_poly_set_coeff_padic(g, k, one, ctx);
padic_clear(one);
padic_poly_compose(h2, f, g, ctx);
result = (padic_poly_equal(h1, h2) && padic_poly_is_reduced(h1, ctx));
if (!result)
{
flint_printf("FAIL (cmp with composition):\n");
flint_printf("f = "), padic_poly_print(f, ctx), flint_printf("\n\n");
flint_printf("g = "), padic_poly_print(g, ctx), flint_printf("\n\n");
flint_printf("h1 = "), padic_poly_print(h1, ctx), flint_printf("\n\n");
flint_printf("h2 = "), padic_poly_print(h2, ctx), flint_printf("\n\n");
flint_printf("p = "), fmpz_print(p), flint_printf("\n\n");
flint_printf("N = %wd\n\n", N);
abort();
}
padic_poly_clear(f);
padic_poly_clear(g);
padic_poly_clear(h1);
padic_poly_clear(h2);
padic_ctx_clear(ctx);
fmpz_clear(p);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return EXIT_SUCCESS;
}