1 /* Copyright (C) 1992-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
27 static struct random_data rdata;
31 static char state[32];
33 __initstate_r (time ((time_t *) NULL) ^ getpid (),
34 state, sizeof (state), &rdata);
38 size_t len = strlen (string);
40 for (size_t i = 0; i < len - 1; ++i)
43 __random_r (&rdata, &j);
44 j = j % (len - i) + i;
47 string[i] = string[j];