aa9bc17601
BMakefiles and other bits will follow. Requested by: Andrey Chernov Made world by: Chuck Robey
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/* mpf_random2 -- Generate a positive random mpf_t of specified size, with
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long runs of consecutive ones and zeros in the binary representation.
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Intended for testing of other MP routines.
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Copyright (C) 1995, 1996 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Library General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
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License for more details.
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You should have received a copy of the GNU Library General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include "gmp.h"
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#include "gmp-impl.h"
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#if defined (__hpux) || defined (alpha__) || defined (__svr4__) || defined (__SVR4)
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/* HPUX lacks random(). DEC OSF/1 1.2 random() returns a double. */
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long mrand48 ();
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static inline long
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random ()
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{
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return mrand48 ();
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}
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#else
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long random ();
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#endif
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void
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#if __STDC__
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mpf_random2 (mpf_ptr x, mp_size_t size, mp_exp_t exp)
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#else
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mpf_random2 (x, size, exp)
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mpf_ptr x;
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mp_size_t size;
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mp_exp_t exp;
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#endif
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{
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mp_size_t asize;
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mp_size_t prec = x->_mp_prec;
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asize = ABS (size);
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if (asize != 0)
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{
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if (asize > prec + 1)
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asize = prec + 1;
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mpn_random2 (x->_mp_d, asize);
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}
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if (exp != 0)
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exp = random () % (2 * exp) - exp;
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x->_mp_exp = asize == 0 ? 0 : exp;
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x->_mp_size = size < 0 ? -asize : asize;
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}
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