mirror of https://github.com/macssh/macssh.git
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
|
/* mpf_random2 -- Generate a positive random mpf_t of specified size, with
|
||
|
|
long runs of consecutive ones and zeros in the binary representation.
|
||
|
|
Intended for testing of other MP routines.
|
||
|
|
|
||
|
|
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
This file is part of the GNU MP Library.
|
||
|
|
|
||
|
|
The GNU MP 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 MP 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 MP Library; see the file COPYING.LIB. If not, write to
|
||
|
|
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
|
||
|
|
MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
#include "gmp.h"
|
||
|
|
#include "gmp-impl.h"
|
||
|
|
|
||
|
|
#if defined (__hpux) || defined (__alpha) || defined (__svr4__) || defined (__SVR4)
|
||
|
|
/* HPUX lacks random(). DEC OSF/1 1.2 random() returns a double. */
|
||
|
|
long mrand48 ();
|
||
|
|
static inline long
|
||
|
|
random ()
|
||
|
|
{
|
||
|
|
return mrand48 ();
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
long random ();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
void
|
||
|
|
#if __STDC__
|
||
|
|
mpf_random2 (mpf_ptr x, mp_size_t size, mp_exp_t exp)
|
||
|
|
#else
|
||
|
|
mpf_random2 (x, size, exp)
|
||
|
|
mpf_ptr x;
|
||
|
|
mp_size_t size;
|
||
|
|
mp_exp_t exp;
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
mp_size_t asize;
|
||
|
|
mp_size_t prec = x->_mp_prec;
|
||
|
|
|
||
|
|
asize = ABS (size);
|
||
|
|
if (asize != 0)
|
||
|
|
{
|
||
|
|
if (asize > prec + 1)
|
||
|
|
asize = prec + 1;
|
||
|
|
|
||
|
|
mpn_random2 (x->_mp_d, asize);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (exp != 0)
|
||
|
|
exp = random () % (2 * exp) - exp;
|
||
|
|
x->_mp_exp = asize == 0 ? 0 : exp;
|
||
|
|
x->_mp_size = size < 0 ? -asize : asize;
|
||
|
|
}
|