glibc/string/strfry.c
Andreas Jaeger 41bdb6e20c Update to LGPL v2.1.
2001-07-06  Paul Eggert  <eggert@twinsun.com>

	* manual/argp.texi: Remove ignored LGPL copyright notice; it's
	not appropriate for documentation anyway.
	* manual/libc-texinfo.sh: "Library General Public License" ->
	"Lesser General Public License".

2001-07-06  Andreas Jaeger  <aj@suse.de>

	* All files under GPL/LGPL version 2: Place under LGPL version
	2.1.
2001-07-06 04:58:11 +00:00

54 lines
1.4 KiB
C

/* Copyright (C) 1992, 1996, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <string.h>
#include <stdlib.h>
#include <time.h>
char *
strfry (char *string)
{
static int init;
static struct random_data rdata;
size_t len, i;
if (!init)
{
static char state[32];
rdata.state = NULL;
__initstate_r (time ((time_t *) NULL), state, sizeof (state), &rdata);
init = 1;
}
len = strlen (string);
for (i = 0; i < len; ++i)
{
int32_t j;
char c;
__random_r (&rdata, &j);
j %= len;
c = string[i];
string[i] = string[j];
string[j] = c;
}
return string;
}