Return to random.c CVS log

Up to [local] / OpenXM_contrib / gmp / mpn / generic

Annotation of OpenXM_contrib/gmp/mpn/generic/random.c, Revision 1.1.1.2

1.1       maekawa     1: /* mpn_random -- Generate random numbers.
                      2:
1.1.1.2 ! ohara       3: Copyright 2001, 2002 Free Software Foundation, Inc.
1.1       maekawa     4:
                      5: This file is part of the GNU MP Library.
                      6:
                      7: The GNU MP Library is free software; you can redistribute it and/or modify
                      8: it under the terms of the GNU Lesser General Public License as published by
                      9: the Free Software Foundation; either version 2.1 of the License, or (at your
                     10: option) any later version.
                     11:
                     12: The GNU MP Library is distributed in the hope that it will be useful, but
                     13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
                     15: License for more details.
                     16:
                     17: You should have received a copy of the GNU Lesser General Public License
                     18: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     20: MA 02111-1307, USA. */
                     21:
                     22: #include "gmp.h"
                     23: #include "gmp-impl.h"
                     24:
                     25: void
1.1.1.2 ! ohara      26: mpn_random (mp_ptr ptr, mp_size_t size)
1.1       maekawa    27: {
1.1.1.2 ! ohara      28:   gmp_randstate_ptr  rands;
1.1       maekawa    29:
1.1.1.2 ! ohara      30:   /* FIXME: Is size==0 supposed to be allowed? */
        !            31:   ASSERT (size >= 0);
        !            32:
        !            33:   if (size == 0)
        !            34:     return;
        !            35:
        !            36:   rands = RANDS;
        !            37:   _gmp_rand (ptr, rands, size * GMP_NUMB_BITS);
1.1       maekawa    38:
                     39:   /* Make sure the most significant limb is non-zero.  */
1.1.1.2 ! ohara      40:   while (ptr[size-1] == 0)
        !            41:     _gmp_rand (&ptr[size-1], rands, GMP_NUMB_BITS);
1.1       maekawa    42: }