w32tex
About: TeX Live provides a comprehensive TeX system including all the major TeX-related programs, macro packages, and fonts that are free software. Windows sources.
  Fossies Dox: w32tex-src.tar.xz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

set_prec.c
Go to the documentation of this file.
1 /* mpfr_set_prec -- reset the precision of a floating-point number
2 
3 Copyright 1999, 2001-2002, 2004, 2006-2020 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 https://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 
27 {
28  mp_size_t xsize, xoldsize;
29 
30  /* first, check if p is correct */
32 
33  /* Calculate the new number of limbs */
35 
36  /* Realloc only if the new size is greater than the old */
37  xoldsize = MPFR_GET_ALLOC_SIZE (x);
38  if (xsize > xoldsize)
39  {
40  mpfr_size_limb_t *tmp;
41 
44  MPFR_MALLOC_SIZE(xoldsize),
46  MPFR_SET_MANT_PTR(x, tmp);
48  }
49  MPFR_PREC (x) = p;
50  MPFR_SET_NAN (x); /* initializes to NaN */
51 }
52 
53 #undef mpfr_get_prec
56 {
57  return MPFR_PREC(x);
58 }
long int mp_size_t
Definition: gmp.h:175
small capitals from c petite p
Definition: afcover.h:72
void * mpfr_reallocate_func(void *ptr, size_t old_size, size_t new_size)
Definition: mpfr-gmp.c:319
#define MPFR_SET_NAN(x)
Definition: mpfr-impl.h:1081
#define MPFR_PREC_COND(p)
Definition: mpfr-impl.h:942
#define MPFR_PREC(x)
Definition: mpfr-impl.h:958
#define MPFR_HOT_FUNCTION_ATTR
Definition: mpfr-impl.h:192
#define MPFR_SET_ALLOC_SIZE(x, n)
Definition: mpfr-impl.h:1321
#define MPFR_MALLOC_SIZE(s)
Definition: mpfr-impl.h:1323
#define MPFR_GET_ALLOC_SIZE(x)
Definition: mpfr-impl.h:1319
#define MPFR_ASSERTN(expr)
Definition: mpfr-impl.h:495
#define MPFR_PREC2LIMBS(p)
Definition: mpfr-impl.h:955
#define MPFR_GET_REAL_PTR(x)
Definition: mpfr-impl.h:1327
#define MPFR_SET_MANT_PTR(x, p)
Definition: mpfr-impl.h:1325
long mpfr_prec_t
Definition: mpfr.h:168
float x
Definition: cordic.py:15
static int xsize
Definition: ppmtopjxl.c:41
mpfr_prec_t mpfr_get_prec(mpfr_srcptr x)
Definition: set_prec.c:55
void mpfr_set_prec(mpfr_ptr x, mpfr_prec_t p)
Definition: set_prec.c:26