1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* mpfr_init -- initialize a floating-point number
Copyright (C) 1999 Free Software Foundation.
This file is part of the MPFR Library.
The MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
The 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with the MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <stdio.h>
#include "gmp.h"
#include "mpfr.h"
#include "gmp-impl.h"
void
#if __STDC__
mpfr_init2 (mpfr_ptr x, mp_prec_t p)
#else
mpfr_init2 (x, p)
mpfr_ptr x;
mp_prec_t p;
#endif
{
mp_prec_t xsize;
if (p==0) {
fprintf(stderr, "*** cannot initialize mpfr with precision 0\n"); exit(1);
}
xsize = (p - 1)/BITS_PER_MP_LIMB + 1;
MPFR_PREC(x) = p;
MPFR_MANT(x) = (mp_ptr) (*_mp_allocate_func) (xsize * BYTES_PER_MP_LIMB);
if (MPFR_MANT(x) == 0) {
fprintf (stderr, "Error in mpfr_init2: no more memory available\n");
exit (1);
}
MPFR_SIZE(x) = xsize;
MPFR_SET_ZERO(x); /* initializes to zero */
MPFR_EXP(x) = 0; /* avoids uninitialized memory reads for zero */
}
void
#if __STDC__
mpfr_init (mpfr_ptr x)
#else
mpfr_init (x)
mpfr_ptr x;
#endif
{
mpfr_init2(x, __gmp_default_fp_bit_precision);
}
|
