2008-06-25 03:33:36 -04:00
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/* mpn_random -- Generate random numbers.
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Copyright 2001, 2002 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 Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 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 Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser 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., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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2009-02-12 05:24:24 -05:00
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#include "mpir.h"
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2008-06-25 03:33:36 -04:00
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#include "gmp-impl.h"
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void
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mpn_random (mp_ptr ptr, mp_size_t size)
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{
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gmp_randstate_ptr rands;
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/* FIXME: Is size==0 supposed to be allowed? */
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ASSERT (size >= 0);
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if (size == 0)
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return;
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rands = RANDS;
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_gmp_rand (ptr, rands, size * GMP_NUMB_BITS);
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/* Make sure the most significant limb is non-zero. */
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while (ptr[size-1] == 0)
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_gmp_rand (&ptr[size-1], rands, GMP_NUMB_BITS);
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}
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