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