pqc/external/flint-2.4.3/fq_mat_templates/randrank.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 Fredrik Johansson
Copyright (C) 2013 Mike Hansen
******************************************************************************/
#ifdef T
#include "templates.h"
void
TEMPLATE(T, mat_randrank) (TEMPLATE(T, mat_t) mat, flint_rand_t state,
slong rank, const TEMPLATE(T, ctx_t) ctx)
{
slong i;
TEMPLATE(T, struct) * diag;
if (rank < 0 || rank > mat->r || rank > mat->c)
{
printf("Exception (nmod_mat_randrank). Impossible rank.\n");
abort();
}
diag = _TEMPLATE(T, vec_init) (rank, ctx);
for (i = 0; i < rank; i++)
TEMPLATE(T, randtest_not_zero) (diag + i, state, ctx);
TEMPLATE(T, mat_randpermdiag) (mat, state, diag, rank, ctx);
_TEMPLATE(T, vec_clear) (diag, rank, ctx);
}
#endif