mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
|
|
Copyright (C) 2012 Fredrik Johansson
|
|
|
|
This file is part of Arb.
|
|
|
|
Arb is free software: you can redistribute it and/or modify it under
|
|
the terms of the GNU Lesser General Public License (LGPL) as published
|
|
by the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version. See <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "bernoulli.h"
|
|
|
|
TLS_PREFIX slong bernoulli_cache_num = 0;
|
|
|
|
TLS_PREFIX fmpq * bernoulli_cache = NULL;
|
|
|
|
void
|
|
bernoulli_cleanup(void)
|
|
{
|
|
slong i;
|
|
|
|
for (i = 0; i < bernoulli_cache_num; i++)
|
|
fmpq_clear(bernoulli_cache + i);
|
|
|
|
flint_free(bernoulli_cache);
|
|
bernoulli_cache = NULL;
|
|
bernoulli_cache_num = 0;
|
|
}
|
|
|
|
void
|
|
bernoulli_cache_compute(slong n)
|
|
{
|
|
if (bernoulli_cache_num < n)
|
|
{
|
|
slong i, new_num;
|
|
bernoulli_rev_t iter;
|
|
|
|
if (bernoulli_cache_num == 0)
|
|
{
|
|
flint_register_cleanup_function(bernoulli_cleanup);
|
|
}
|
|
|
|
new_num = FLINT_MAX(bernoulli_cache_num + 128, n);
|
|
|
|
bernoulli_cache = flint_realloc(bernoulli_cache, new_num * sizeof(fmpq));
|
|
for (i = bernoulli_cache_num; i < new_num; i++)
|
|
fmpq_init(bernoulli_cache + i);
|
|
|
|
i = new_num - 1;
|
|
i -= (i % 2);
|
|
bernoulli_rev_init(iter, i);
|
|
for ( ; i >= bernoulli_cache_num; i -= 2)
|
|
{
|
|
bernoulli_rev_next(fmpq_numref(bernoulli_cache + i),
|
|
fmpq_denref(bernoulli_cache + i), iter);
|
|
}
|
|
bernoulli_rev_clear(iter);
|
|
|
|
if (new_num > 1)
|
|
fmpq_set_si(bernoulli_cache + 1, -1, 2);
|
|
|
|
bernoulli_cache_num = new_num;
|
|
}
|
|
}
|
|
|