OpenXM_contrib/gmp/mpf/urandomb.c - diff

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version 1.1, 2000/09/09 14:13:15

version 1.1.1.2, 2003/08/25 16:06:35

Line 3

using STATE as the random state previously initialized by a call to

gmp_randinit().

This file is part of the GNU MP Library.

Line 26 MA 02111-1307, USA. */

#include "gmp-impl.h"

void

#if __STDC__

mpf_urandomb (mpf_t rop, gmp_randstate_t rstate, unsigned long int nbits)

#else

mpf_urandomb (rop, rstate, nbits)

mpf_t rop;

gmp_randstate_t rstate;

unsigned long int nbits;

#endif

{

mp_ptr rp;

mp_size_t nlimbs;

mp_exp_t exp;

nbits = MIN (nbits, __GMPF_PREC_TO_BITS (rop->_mp_prec));

rp = PTR (rop);

nlimbs = (nbits + BITS_PER_MP_LIMB - 1) / BITS_PER_MP_LIMB;

nlimbs = (nbits + GMP_NUMB_BITS - 1) / GMP_NUMB_BITS;

_gmp_rand (rp, rstate, nbits);

/* If nbits isn't a multiple of BITS_PER_MP_LIMB, shift up. */

/* If nbits isn't a multiple of GMP_NUMB_BITS, shift up. */

if (nlimbs != 0)

{

if (nbits % BITS_PER_MP_LIMB != 0)

if (nbits % GMP_NUMB_BITS != 0)

mpn_lshift (rp, rp, nlimbs,

mpn_lshift (rp, rp, nlimbs, GMP_NUMB_BITS - nbits % GMP_NUMB_BITS);

BITS_PER_MP_LIMB - nbits % BITS_PER_MP_LIMB);

}

exp = 0;

Line 60 mpf_urandomb (rop, rstate, nbits)

Line 54 mpf_urandomb (rop, rstate, nbits)

}

EXP (rop) = exp;

SIZ (rop) = nlimbs;

}