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Diffstat (limited to 'Build/source/libs/mpfr/mpfr-3.1.3/src/init2.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-3.1.3/src/init2.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-3.1.3/src/init2.c b/Build/source/libs/mpfr/mpfr-3.1.3/src/init2.c new file mode 100644 index 00000000000..0fb7dc76ae3 --- /dev/null +++ b/Build/source/libs/mpfr/mpfr-3.1.3/src/init2.c @@ -0,0 +1,69 @@ +/* mpfr_init2 -- initialize a floating-point number with given precision + +Copyright 2001-2015 Free Software Foundation, Inc. +Contributed by the AriC and Caramel projects, INRIA. + +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 +http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., +51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#include "mpfr-impl.h" + +void +mpfr_init2 (mpfr_ptr x, mpfr_prec_t p) +{ + mp_size_t xsize; + mpfr_limb_ptr tmp; + + /* Check if we can represent the number of limbs + * associated to the maximum of mpfr_prec_t*/ + MPFR_ASSERTN( MP_SIZE_T_MAX >= (MPFR_PREC_MAX/MPFR_BYTES_PER_MP_LIMB) ); + + /* Check for correct GMP_NUMB_BITS and MPFR_BYTES_PER_MP_LIMB */ + MPFR_ASSERTN( GMP_NUMB_BITS == MPFR_BYTES_PER_MP_LIMB * CHAR_BIT + && sizeof(mp_limb_t) == MPFR_BYTES_PER_MP_LIMB ); + + MPFR_ASSERTN (mp_bits_per_limb == GMP_NUMB_BITS); + + /* Check for correct EXP NAN, ZERO & INF in both mpfr.h and mpfr-impl.h */ + MPFR_ASSERTN( __MPFR_EXP_NAN == MPFR_EXP_NAN ); + MPFR_ASSERTN( __MPFR_EXP_ZERO == MPFR_EXP_ZERO ); + MPFR_ASSERTN( __MPFR_EXP_INF == MPFR_EXP_INF ); + + MPFR_ASSERTN( MPFR_EMAX_MAX <= (MPFR_EXP_MAX >> 1) ); + MPFR_ASSERTN( MPFR_EMIN_MIN >= -(MPFR_EXP_MAX >> 1) ); + + /* p=1 is not allowed since the rounding to nearest even rule requires at + least two bits of mantissa: the neighbours of 3/2 are 1*2^0 and 1*2^1, + which both have an odd mantissa */ + MPFR_ASSERTN(p >= MPFR_PREC_MIN && p <= MPFR_PREC_MAX); + + xsize = MPFR_PREC2LIMBS (p); + tmp = (mpfr_limb_ptr) (*__gmp_allocate_func)(MPFR_MALLOC_SIZE(xsize)); + + MPFR_PREC(x) = p; /* Set prec */ + MPFR_EXP (x) = MPFR_EXP_INVALID; /* make sure that the exp field has a + valid value in the C point of view */ + MPFR_SET_POS(x); /* Set a sign */ + MPFR_SET_MANT_PTR(x, tmp); /* Set Mantissa ptr */ + MPFR_SET_ALLOC_SIZE(x, xsize); /* Fix alloc size of Mantissa */ + MPFR_SET_NAN(x); /* initializes to NaN */ +} + +#ifdef MPFR_USE_OWN_MPFR_TMP_ALLOC +static unsigned char mpfr_stack_tab[8000000]; +unsigned char *mpfr_stack = mpfr_stack_tab; +#endif |