source/libs/mpfr/mpfr-src/src/set_dfl_prec.c

   1 /* mpfr_set_default_prec, mpfr_get_default_prec -- set/get default precision
   2
   3 Copyright 1999-2001, 2004-2016 Free Software Foundation, Inc.
   4 Contributed by the AriC and Caramba projects, INRIA.
   5
   6 This file is part of the GNU MPFR Library.
   7
   8 The GNU MPFR Library is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU Lesser General Public License as published by
  10 the Free Software Foundation; either version 3 of the License, or (at your
  11 option) any later version.
  12
  13 The GNU MPFR Library is distributed in the hope that it will be useful, but
  14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15 or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  16 License for more details.
  17
  18 You should have received a copy of the GNU Lesser General Public License
  19 along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
  20 http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
  21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
  22
  23 #include "mpfr-impl.h"
  24
  25 /* default is IEEE double precision, i.e. 53 bits */
  26 MPFR_THREAD_ATTR mpfr_prec_t __gmpfr_default_fp_bit_precision \
  27   = IEEE_DBL_MANT_DIG;
  28
  29 #ifdef MPFR_WIN_THREAD_SAFE_DLL
  30 mpfr_prec_t * __gmpfr_default_fp_bit_precision_f()
  31 {
  32   return &__gmpfr_default_fp_bit_precision;
  33 }
  34 #endif
  35
  36 void
  37 mpfr_set_default_prec (mpfr_prec_t prec)
  38 {
  39   MPFR_ASSERTN (prec >= MPFR_PREC_MIN && prec <= MPFR_PREC_MAX);
  40   __gmpfr_default_fp_bit_precision = prec;
  41 }
  42
  43 #undef mpfr_get_default_prec
  44 mpfr_prec_t
  45 mpfr_get_default_prec (void)
  46 {
  47   return __gmpfr_default_fp_bit_precision;
  48 }