mirror of
https://github.com/vale981/arb
synced 2025-03-06 01:41:39 -05:00
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/*=============================================================================
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This file is part of ARB.
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ARB 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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ARB 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 ARB; 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) 2013 Fredrik Johansson
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******************************************************************************/
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#include "gamma.h"
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int main()
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{
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long iter;
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flint_rand_t state;
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printf("small_frac....");
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fflush(stdout);
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flint_randinit(state);
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for (iter = 0; iter < 1000; iter++)
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{
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fmprb_t r, s;
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fmpq_t q;
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long accuracy, prec;
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prec = 2 + n_randint(state, 1 << n_randint(state, 15));
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fmprb_init(r);
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fmprb_init(s);
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fmpq_init(q);
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switch (n_randint(state, 8))
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{
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case 0: fmpq_set_si(q, 1, 1); break;
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case 1: fmpq_set_si(q, 1, 2); break;
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case 2: fmpq_set_si(q, 1, 3); break;
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case 3: fmpq_set_si(q, 2, 3); break;
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case 4: fmpq_set_si(q, 1, 4); break;
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case 5: fmpq_set_si(q, 3, 4); break;
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case 6: fmpq_set_si(q, 1, 6); break;
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default: fmpq_set_si(q, 5, 6); break;
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}
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gamma_small_frac(r, *fmpq_numref(q), *fmpq_denref(q), prec);
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gamma_series_fmpq_hypgeom(s, q, 1, prec);
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if (!fmprb_overlaps(r, s))
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{
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printf("FAIL: containment\n\n");
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printf("prec = %ld\n", prec);
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printf("r = "); fmprb_printd(r, prec / 3.33); printf("\n\n");
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abort();
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}
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accuracy = fmprb_rel_accuracy_bits(r);
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if (accuracy < prec - 4)
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{
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printf("FAIL: poor accuracy\n\n");
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printf("prec = %ld\n", prec);
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printf("r = "); fmprb_printd(r, prec / 3.33); printf("\n\n");
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abort();
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}
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fmprb_clear(r);
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fmprb_clear(s);
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fmpq_clear(q);
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}
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flint_randclear(state);
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flint_cleanup();
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printf("PASS\n");
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return EXIT_SUCCESS;
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}
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