float.h revision 276479 
1/*===---- float.h - Characteristics of floating point types ----------------===
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19 * THE SOFTWARE.
20 *
21 *===-----------------------------------------------------------------------===
22 */
23
24#ifndef __FLOAT_H
25#define __FLOAT_H
26
27/* If we're on MinGW, fall back to the system's float.h, which might have
28 * additional definitions provided for Windows.
29 * For more details see http://msdn.microsoft.com/en-us/library/y0ybw9fy.aspx
30 */
31#if (defined(__MINGW32__) || defined(_MSC_VER)) && \
32    __has_include_next(<float.h>)
33#  include_next <float.h>
34
35/* Undefine anything that we'll be redefining below. */
36#  undef FLT_EVAL_METHOD
37#  undef FLT_ROUNDS
38#  undef FLT_RADIX
39#  undef FLT_MANT_DIG
40#  undef DBL_MANT_DIG
41#  undef LDBL_MANT_DIG
42#  undef DECIMAL_DIG
43#  undef FLT_DIG
44#  undef DBL_DIG
45#  undef LDBL_DIG
46#  undef FLT_MIN_EXP
47#  undef DBL_MIN_EXP
48#  undef LDBL_MIN_EXP
49#  undef FLT_MIN_10_EXP
50#  undef DBL_MIN_10_EXP
51#  undef LDBL_MIN_10_EXP
52#  undef FLT_MAX_EXP
53#  undef DBL_MAX_EXP
54#  undef LDBL_MAX_EXP
55#  undef FLT_MAX_10_EXP
56#  undef DBL_MAX_10_EXP
57#  undef LDBL_MAX_10_EXP
58#  undef FLT_MAX
59#  undef DBL_MAX
60#  undef LDBL_MAX
61#  undef FLT_EPSILON
62#  undef DBL_EPSILON
63#  undef LDBL_EPSILON
64#  undef FLT_MIN
65#  undef DBL_MIN
66#  undef LDBL_MIN
67#  if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__)
68#    undef FLT_TRUE_MIN
69#    undef DBL_TRUE_MIN
70#    undef LDBL_TRUE_MIN
71#  endif
72#endif
73
74/* Characteristics of floating point types, C99 5.2.4.2.2 */
75
76#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
77#define FLT_ROUNDS (__builtin_flt_rounds())
78#define FLT_RADIX __FLT_RADIX__
79
80#define FLT_MANT_DIG __FLT_MANT_DIG__
81#define DBL_MANT_DIG __DBL_MANT_DIG__
82#define LDBL_MANT_DIG __LDBL_MANT_DIG__
83
84#define DECIMAL_DIG __DECIMAL_DIG__
85
86#define FLT_DIG __FLT_DIG__
87#define DBL_DIG __DBL_DIG__
88#define LDBL_DIG __LDBL_DIG__
89
90#define FLT_MIN_EXP __FLT_MIN_EXP__
91#define DBL_MIN_EXP __DBL_MIN_EXP__
92#define LDBL_MIN_EXP __LDBL_MIN_EXP__
93
94#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
95#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
96#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
97
98#define FLT_MAX_EXP __FLT_MAX_EXP__
99#define DBL_MAX_EXP __DBL_MAX_EXP__
100#define LDBL_MAX_EXP __LDBL_MAX_EXP__
101
102#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
103#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
104#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
105
106#define FLT_MAX __FLT_MAX__
107#define DBL_MAX __DBL_MAX__
108#define LDBL_MAX __LDBL_MAX__
109
110#define FLT_EPSILON __FLT_EPSILON__
111#define DBL_EPSILON __DBL_EPSILON__
112#define LDBL_EPSILON __LDBL_EPSILON__
113
114#define FLT_MIN __FLT_MIN__
115#define DBL_MIN __DBL_MIN__
116#define LDBL_MIN __LDBL_MIN__
117
118#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__)
119#  define FLT_TRUE_MIN __FLT_DENORM_MIN__
120#  define DBL_TRUE_MIN __DBL_DENORM_MIN__
121#  define LDBL_TRUE_MIN __LDBL_DENORM_MIN__
122#endif
123
124#endif /* __FLOAT_H */
125