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47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
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/* Copyright (C) 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <string.h>
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#include <stdlib.h>
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#include <time.h>
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char *
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DEFUN(strfry, (string), char *string)
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{
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static int init = 0;
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size_t len, i;
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if (!init)
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{
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srand (time ((time_t *) NULL));
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init = 1;
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}
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len = strlen (string);
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for (i = 0; i < len; ++i)
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{
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size_t j = rand () % len;
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char c = string[i];
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string[i] = string[j];
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string[j] = c;
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}
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return string;
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}
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