100 lines
2.8 KiB
C
100 lines
2.8 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) 2009 William Hart
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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("xgcd_partial....");
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fflush(stdout);
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/* Test co2*r1 - co1*r2 = r2_orig */
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for (i = 0; i < 1000 * flint_test_multiplier(); i++)
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{
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fmpz_t co1, co2, f, g, t1, t2, L;
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fmpz_init(co1);
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fmpz_init(co2);
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fmpz_init(f);
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fmpz_init(g);
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fmpz_init(L);
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fmpz_init(t1);
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fmpz_init(t2);
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fmpz_randtest_unsigned(g, state, 200);
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fmpz_add_ui(g, g, 1);
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fmpz_randm(f, state, g);
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fmpz_randtest_unsigned(L, state, 200);
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fmpz_set(t2, g);
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fmpz_abs(t2, t2);
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fmpz_xgcd_partial(co2, co1, g, f, L);
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fmpz_mul(t1, co2, f);
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fmpz_submul(t1, co1, g);
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fmpz_abs(t1, t1);
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result = fmpz_equal(t1, t2);
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if (!result)
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{
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flint_printf("FAIL:\n\n");
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flint_printf("co1 = "), fmpz_print(co1), flint_printf("\n");
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flint_printf("co2 = "), fmpz_print(co2), flint_printf("\n");
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flint_printf("f = "), fmpz_print(f), flint_printf("\n");
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flint_printf("g = "), fmpz_print(g), flint_printf("\n");
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flint_printf("L = "), fmpz_print(L), flint_printf("\n");
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flint_printf("t1 = "), fmpz_print(t1), flint_printf("\n");
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flint_printf("t2 = "), fmpz_print(t2), flint_printf("\n");
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abort();
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}
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fmpz_clear(co1);
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fmpz_clear(co2);
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fmpz_clear(f);
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fmpz_clear(g);
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fmpz_clear(L);
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fmpz_clear(t1);
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fmpz_clear(t2);
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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 0;
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}
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