120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
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/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2011 Sebastian Pancratz
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******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <gmp.h>
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#include "flint.h"
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#include "ulong_extras.h"
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#include "fmpz.h"
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int
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main(void)
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{
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int i, result;
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FLINT_TEST_INIT(state);
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flint_printf("flog_ui....");
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fflush(stdout);
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/* Check correctness */
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for (i = 0; i < 10000 * flint_test_multiplier(); i++)
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{
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fmpz_t a, b, x, y;
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slong k;
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fmpz_init(a);
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fmpz_init(b);
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fmpz_init(x);
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fmpz_init(y);
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while (fmpz_cmp_ui(a, 1) < 0)
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fmpz_randtest(a, state, 200);
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while (fmpz_cmp_ui(b, 2) < 0)
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fmpz_set_ui(b, n_randtest(state));
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k = fmpz_flog_ui(a, fmpz_get_ui(b));
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fmpz_pow_ui(x, b, k);
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fmpz_pow_ui(y, b, k + 1);
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result = (fmpz_cmp(x, a) <= 0 && fmpz_cmp(a, y) < 0);
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if (!result)
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{
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flint_printf("FAIL:\n");
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flint_printf("a = "), fmpz_print(a), flint_printf("\n");
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flint_printf("b = "), fmpz_print(b), flint_printf("\n");
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flint_printf("x = "), fmpz_print(x), flint_printf("\n");
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flint_printf("y = "), fmpz_print(y), flint_printf("\n");
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flint_printf("k = %wd\n", k);
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abort();
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}
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fmpz_clear(a);
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fmpz_clear(b);
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fmpz_clear(x);
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fmpz_clear(y);
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}
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/* Check correctness: exact powers */
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for (i = 0; i < 10000 * flint_test_multiplier(); i++)
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{
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fmpz_t a, b;
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slong k, l;
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fmpz_init(a);
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fmpz_init(b);
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while (fmpz_cmp_ui(b, 2) < 0)
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fmpz_set_ui(b, n_randtest(state));
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l = n_randint(state, 20);
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fmpz_pow_ui(a, b, l);
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k = fmpz_flog_ui(a, fmpz_get_ui(b));
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result = (k == l);
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if (!result)
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{
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flint_printf("FAIL:\n");
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flint_printf("a = "), fmpz_print(a), flint_printf("\n");
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flint_printf("b = "), fmpz_print(b), flint_printf("\n");
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flint_printf("k = %wd\n", k);
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flint_printf("l = %wd\n", l);
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abort();
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}
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fmpz_clear(a);
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fmpz_clear(b);
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}
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FLINT_TEST_CLEANUP(state);
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flint_printf("PASS\n");
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return EXIT_SUCCESS;
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}
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