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)) && __STDC_HOSTED__ && \
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