urandomb.c
上传用户:qaz666999
上传日期:2022-08-06
资源大小:2570k
文件大小:1k
- /* mpz_urandomb (rop, state, n) -- Generate a uniform pseudorandom
- integer in the range 0 to 2^N - 1, inclusive, using STATE as the
- random state previously initialized by a call to gmp_randinit().
- Copyright 1999, 2000, 2002 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 3 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. If not, see http://www.gnu.org/licenses/. */
- #include "gmp.h"
- #include "gmp-impl.h"
- void
- mpz_urandomb (mpz_ptr rop, gmp_randstate_t rstate, mp_bitcnt_t nbits)
- {
- mp_ptr rp;
- mp_size_t size;
- size = BITS_TO_LIMBS (nbits);
- rp = MPZ_REALLOC (rop, size);
- _gmp_rand (rp, rstate, nbits);
- MPN_NORMALIZE (rp, size);
- SIZ (rop) = size;
- }