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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/* ieee-utils/gsl_ieee_utils.h
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Brian Gough
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __GSL_IEEE_UTILS_H__
#define __GSL_IEEE_UTILS_H__
#include <stdio.h>
#undef __BEGIN_DECLS
#undef __END_DECLS
#ifdef __cplusplus
# define __BEGIN_DECLS extern "C" {
# define __END_DECLS }
#else
# define __BEGIN_DECLS /* empty */
# define __END_DECLS /* empty */
#endif
__BEGIN_DECLS
enum {
GSL_IEEE_TYPE_NAN = 1,
GSL_IEEE_TYPE_INF = 2,
GSL_IEEE_TYPE_NORMAL = 3,
GSL_IEEE_TYPE_DENORMAL = 4,
GSL_IEEE_TYPE_ZERO = 5
} ;
typedef struct {
int sign ;
char mantissa[24] ; /* Actual bits are 0..22, element 23 is \0 */
int exponent ;
int type ;
} gsl_ieee_float_rep ;
typedef struct {
int sign ;
char mantissa[53] ; /* Actual bits are 0..51, element 52 is \0 */
int exponent ;
int type ;
} gsl_ieee_double_rep ;
void gsl_ieee_printf_float (const float * x) ;
void gsl_ieee_printf_double (const double * x) ;
void gsl_ieee_fprintf_float (FILE * stream, const float * x) ;
void gsl_ieee_fprintf_double (FILE * stream, const double * x) ;
void gsl_ieee_float_to_rep (const float * x, gsl_ieee_float_rep * r) ;
void gsl_ieee_double_to_rep (const double * x, gsl_ieee_double_rep * r) ;
enum {
GSL_IEEE_SINGLE_PRECISION = 1,
GSL_IEEE_DOUBLE_PRECISION = 2,
GSL_IEEE_EXTENDED_PRECISION = 3
} ;
enum {
GSL_IEEE_ROUND_TO_NEAREST = 1,
GSL_IEEE_ROUND_DOWN = 2,
GSL_IEEE_ROUND_UP = 3,
GSL_IEEE_ROUND_TO_ZERO = 4
} ;
enum {
GSL_IEEE_MASK_INVALID = 1,
GSL_IEEE_MASK_DENORMALIZED = 2,
GSL_IEEE_MASK_DIVISION_BY_ZERO = 4,
GSL_IEEE_MASK_OVERFLOW = 8,
GSL_IEEE_MASK_UNDERFLOW = 16,
GSL_IEEE_MASK_ALL = 31,
GSL_IEEE_TRAP_INEXACT = 32
} ;
void gsl_ieee_env_setup (void) ;
int gsl_ieee_read_mode_string (const char * description, int * precision,
int * rounding, int * exception_mask) ;
int gsl_ieee_set_mode (int precision, int rounding, int exception_mask) ;
__END_DECLS
#endif /* __GSL_IEEE_UTILS_H__ */
|
