rand.c
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上传日期:2022-08-06
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- /* gmp_randinit (state, algorithm, ...) -- Initialize a random state.
- Copyright 1999, 2000, 2001, 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 "config.h"
- #include <stdio.h> /* for NULL */
- #if HAVE_STDARG
- #include <stdarg.h>
- #else
- #include <varargs.h>
- #endif
- #include "gmp.h"
- #include "gmp-impl.h"
- void
- #if HAVE_STDARG
- gmp_randinit (gmp_randstate_t rstate,
- gmp_randalg_t alg,
- ...)
- #else
- gmp_randinit (va_alist)
- va_dcl
- #endif
- {
- va_list ap;
- #if HAVE_STDARG
- va_start (ap, alg);
- #else
- __gmp_randstate_struct *rstate;
- gmp_randalg_t alg;
- va_start (ap);
- rstate = va_arg (ap, __gmp_randstate_struct *);
- alg = va_arg (ap, gmp_randalg_t);
- #endif
- switch (alg) {
- case GMP_RAND_ALG_LC:
- if (! gmp_randinit_lc_2exp_size (rstate, va_arg (ap, unsigned long)))
- gmp_errno |= GMP_ERROR_INVALID_ARGUMENT;
- break;
- default:
- gmp_errno |= GMP_ERROR_UNSUPPORTED_ARGUMENT;
- break;
- }
- va_end (ap);
- }