contrib/gmp/rand.c

   1 /* gmp_randinit (state, algorithm, ...) -- Initialize a random state.
   2
   3 Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   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 3 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.  If not, see http://www.gnu.org/licenses/.  */
  19
  20 #include "config.h"
  21
  22 #include <stdio.h> /* for NULL */
  23
  24 #if HAVE_STDARG
  25 #include <stdarg.h>
  26 #else
  27 #include <varargs.h>
  28 #endif
  29
  30 #include "gmp.h"
  31 #include "gmp-impl.h"
  32
  33 void
  34 #if HAVE_STDARG
  35 gmp_randinit (gmp_randstate_t rstate,
  36               gmp_randalg_t alg,
  37               ...)
  38 #else
  39 gmp_randinit (va_alist)
  40      va_dcl
  41 #endif
  42 {
  43   va_list ap;
  44 #if HAVE_STDARG
  45   va_start (ap, alg);
  46 #else
  47   __gmp_randstate_struct *rstate;
  48   gmp_randalg_t alg;
  49   va_start (ap);
  50   rstate = va_arg (ap, __gmp_randstate_struct *);
  51   alg = va_arg (ap, gmp_randalg_t);
  52 #endif
  53
  54   switch (alg) {
  55   case GMP_RAND_ALG_LC:
  56     if (! gmp_randinit_lc_2exp_size (rstate, va_arg (ap, unsigned long)))
  57       gmp_errno |= GMP_ERROR_INVALID_ARGUMENT;
  58     break;
  59   default:
  60     gmp_errno |= GMP_ERROR_UNSUPPORTED_ARGUMENT;
  61     break;
  62   }
  63   va_end (ap);
  64 }