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/*
Copyright (C) 2010,2011 Fredrik Johansson
Copyright (C) 2013 Mike Hansen
This file is part of FLINT.
FLINT 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 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#ifdef T
#include "templates.h"
#include "perm.h"
int
TEMPLATE(T, mat_randpermdiag) (TEMPLATE(T, mat_t) mat, flint_rand_t state,
TEMPLATE(T, struct) * diag, slong n,
const TEMPLATE(T, ctx_t) ctx)
{
int parity;
slong i;
slong *rows;
slong *cols;
rows = _perm_init(mat->r);
cols = _perm_init(mat->c);
parity = _perm_randtest(rows, mat->r, state);
parity ^= _perm_randtest(cols, mat->c, state);
TEMPLATE(T, mat_zero) (mat, ctx);
for (i = 0; i < n; i++)
TEMPLATE(T, mat_entry_set) (mat, rows[i], cols[i], diag + i, ctx);
_perm_clear(rows);
_perm_clear(cols);
return parity;
}
#endif