pqc/external/flint-2.4.3/nmod_vec/randtest.c

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2014-05-18 22:03:37 +00:00
/*=============================================================================
This file is part of FLINT.
FLINT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FLINT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2010 William Hart
******************************************************************************/
#include <gmp.h>
#include <stdlib.h>
#include "flint.h"
#include "ulong_extras.h"
#include "nmod_vec.h"
void _nmod_vec_randtest(mp_ptr vec, flint_rand_t state, slong len, nmod_t mod)
{
slong i, sparseness;
if (n_randint(state, 2))
{
for (i = 0; i < len; i++)
vec[i] = n_randtest(state) % mod.n;
}
else
{
sparseness = 1 + n_randint(state, FLINT_MAX(2, len));
for (i = 0; i < len; i++)
{
if (n_randint(state, sparseness))
vec[i] = 0;
else
vec[i] = n_randtest(state) % mod.n;
}
}
}