mirror of
https://review.haiku-os.org/buildtools
synced 2025-02-14 17:57:39 +01:00
88896a1144
Change-Id: I42dc2a783b3e0082a7583cc7ecaa6b043ba162f4 Reviewed-on: https://review.haiku-os.org/c/buildtools/+/3021 Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>
87 lines
3.0 KiB
C
87 lines
3.0 KiB
C
/* Declarations of random_deviate routines for mpfr_erandom and mpfr_nrandom.
|
|
|
|
Copyright 2013-2020 Free Software Foundation, Inc.
|
|
Contributed by Charles Karney <charles@karney.com>, SRI International.
|
|
|
|
This file is part of the GNU MPFR Library.
|
|
|
|
The GNU MPFR 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 MPFR 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 MPFR Library; see the file COPYING.LESSER. If not, see
|
|
https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
|
|
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
|
|
|
|
#if !defined(MPFR_RANDOM_DEVIATE_H)
|
|
#define MPFR_RANDOM_DEVIATE_H 1
|
|
|
|
#include "mpfr-impl.h"
|
|
|
|
/* This should be an unsigned type with a width of at least 32 and capable of
|
|
* representing at least 2*MPFR_PREC_MAX. This is used to count the bits in
|
|
* the fraction of a mpfr_random_deviate_t. See the checks made on this type
|
|
* in random_deviate_generate. */
|
|
typedef unsigned long mpfr_random_size_t;
|
|
|
|
typedef struct {
|
|
mpfr_random_size_t e; /* total number of bits in the fraction */
|
|
unsigned long h; /* the high W bits of the fraction */
|
|
mpz_t f; /* the rest of the fraction */
|
|
} __mpfr_random_deviate_struct;
|
|
|
|
typedef __mpfr_random_deviate_struct mpfr_random_deviate_t[1];
|
|
typedef __mpfr_random_deviate_struct *mpfr_random_deviate_ptr;
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* allocate and set to (0,1) */
|
|
__MPFR_DECLSPEC void
|
|
mpfr_random_deviate_init (mpfr_random_deviate_ptr);
|
|
|
|
/* reset to (0,1) */
|
|
__MPFR_DECLSPEC void
|
|
mpfr_random_deviate_reset (mpfr_random_deviate_ptr);
|
|
|
|
/* deallocate */
|
|
__MPFR_DECLSPEC void
|
|
mpfr_random_deviate_clear (mpfr_random_deviate_ptr);
|
|
|
|
/* swap two random deviates */
|
|
__MPFR_DECLSPEC void
|
|
mpfr_random_deviate_swap (mpfr_random_deviate_ptr,
|
|
mpfr_random_deviate_ptr);
|
|
|
|
/* return kth bit of fraction, representing 2^-k */
|
|
__MPFR_DECLSPEC int
|
|
mpfr_random_deviate_tstbit (mpfr_random_deviate_ptr,
|
|
mpfr_random_size_t,
|
|
gmp_randstate_t);
|
|
|
|
/* compare two random deviates, x < y */
|
|
__MPFR_DECLSPEC int
|
|
mpfr_random_deviate_less (mpfr_random_deviate_ptr,
|
|
mpfr_random_deviate_ptr,
|
|
gmp_randstate_t);
|
|
|
|
/* set mpfr_t z = (neg ? -1 : 1) * (n + x) */
|
|
__MPFR_DECLSPEC int
|
|
mpfr_random_deviate_value (int, unsigned long,
|
|
mpfr_random_deviate_ptr, mpfr_t,
|
|
gmp_randstate_t, mpfr_rnd_t);
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif
|