mirror of https://github.com/macssh/macssh.git
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
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/* gmp_randinit_lc_2exp (state, a, c, m2exp) -- Initialize random
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state STATE for a linear congruential generator with multiplier A,
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adder C, and modulus 2 ^ M2EXP.
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Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include "gmp.h"
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#include "gmp-impl.h"
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void
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#if __STDC__
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gmp_randinit_lc_2exp (gmp_randstate_t rstate,
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mpz_t a,
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unsigned long int c,
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unsigned long int m2exp)
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#else
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gmp_randinit_lc_2exp (rstate, a, c, m2exp)
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gmp_randstate_t rstate;
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mpz_t a;
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unsigned long int c;
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unsigned long int m2exp;
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#endif
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{
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mpz_init_set_ui (rstate->seed, 1);
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_mpz_realloc (rstate->seed, m2exp / BITS_PER_MP_LIMB
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+ (m2exp % BITS_PER_MP_LIMB != 0));
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/* Allocate algorithm specific data. */
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rstate->algdata.lc = (__gmp_randata_lc *)
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(*_mp_allocate_func) (sizeof (__gmp_randata_lc));
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mpz_init_set (rstate->algdata.lc->a, a);
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rstate->algdata.lc->c = c;
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/* Cover weird case where m2exp is 0, which means that m is used
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instead of m2exp. */
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if (m2exp == 0)
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mpz_init_set_ui (rstate->algdata.lc->m, 0);
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rstate->algdata.lc->m2exp = m2exp;
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rstate->alg = GMP_RAND_ALG_LC;
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}
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