153 lines
4.2 KiB
C
153 lines
4.2 KiB
C
/*=============================================================================
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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, 2012 Sebastian Pancratz
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******************************************************************************/
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#include "ulong_extras.h"
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#include "long_extras.h"
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#include "padic.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("shift... ");
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fflush(stdout);
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/* Check aliasing */
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for (i = 0; i < 10000; i++)
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{
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fmpz_t p;
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slong N;
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padic_ctx_t ctx;
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padic_t a, b, c;
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slong v;
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fmpz_init_set_ui(p, n_randtest_prime(state, 0));
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N = n_randint(state, PADIC_TEST_PREC_MAX - PADIC_TEST_PREC_MIN)
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+ PADIC_TEST_PREC_MIN;
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padic_ctx_init(ctx, p, FLINT_MAX(0, N-10), FLINT_MAX(0, N+10), PADIC_SERIES);
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padic_init2(a, N);
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padic_init2(b, N);
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padic_init2(c, N);
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padic_randtest(a, state, ctx);
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v = z_randint(state, (FLINT_ABS(N) + 4) / 3);
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padic_set(b, a, ctx);
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padic_shift(c, b, v, ctx);
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padic_shift(b, b, v, ctx);
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result = (padic_equal(b, c));
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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("a = "), padic_print(a, ctx), flint_printf("\n");
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flint_printf("b = "), padic_print(b, ctx), flint_printf("\n");
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flint_printf("c = "), padic_print(c, ctx), flint_printf("\n");
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abort();
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}
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padic_clear(a);
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padic_clear(b);
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padic_clear(c);
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fmpz_clear(p);
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padic_ctx_clear(ctx);
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}
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/* Check that (a * b) * c == a * (b * c), correct only mod p^{N-v} */
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for (i = 0; i < 10000; i++)
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{
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fmpz_t p;
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slong N;
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padic_ctx_t ctx;
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padic_t a, b, c;
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slong v, v1, v2;
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fmpz_init_set_ui(p, n_randtest_prime(state, 0));
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N = n_randint(state, PADIC_TEST_PREC_MAX - PADIC_TEST_PREC_MIN)
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+ PADIC_TEST_PREC_MIN;
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padic_ctx_init(ctx, p, FLINT_MAX(0, N-10), FLINT_MAX(0, N+10), PADIC_SERIES);
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padic_init2(a, N);
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padic_init2(b, N);
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padic_init2(c, N);
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padic_randtest(a, state, ctx);
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v1 = z_randint(state, (FLINT_ABS(N) + 4) / 3);
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v2 = z_randint(state, (FLINT_ABS(N) + 4) / 3);
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padic_shift(b, a, v1, ctx);
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padic_shift(b, b, v2, ctx);
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padic_shift(c, a, v2, ctx);
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padic_shift(c, c, v1, ctx);
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v = FLINT_MIN(v1, v2);
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v = FLINT_MIN(v, padic_val(a));
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v = FLINT_MIN(v, 0);
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if ((v >= 0) || (-v < N)) /* Otherwise, no precision left */
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{
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slong N2 = (v >= 0) ? N : N + v;
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padic_prec(b) = N2;
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padic_prec(c) = N2;
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padic_reduce(b, ctx);
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padic_reduce(c, ctx);
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result = (padic_equal(b, c));
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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("a = "), padic_print(a, ctx), flint_printf("\n");
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flint_printf("b = "), padic_print(b, ctx), flint_printf("\n");
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flint_printf("c = "), padic_print(c, ctx), flint_printf("\n");
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abort();
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}
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}
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padic_clear(a);
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padic_clear(b);
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padic_clear(c);
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fmpz_clear(p);
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padic_ctx_clear(ctx);
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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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