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 * Also fall back on Darwin to allow additional definitions and
32 * implementation-defined values.
33 */
34#if (defined(__APPLE__) || (defined(__MINGW32__) || defined(_MSC_VER))) && \
35    __STDC_HOSTED__ && __has_include_next(<float.h>)
36#  include_next <float.h>
37
38/* Undefine anything that we'll be redefining below. */
39#  undef FLT_EVAL_METHOD
40#  undef FLT_ROUNDS
41#  undef FLT_RADIX
42#  undef FLT_MANT_DIG
43#  undef DBL_MANT_DIG
44#  undef LDBL_MANT_DIG
45#  if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__)
46#    undef DECIMAL_DIG
47#  endif
48#  undef FLT_DIG
49#  undef DBL_DIG
50#  undef LDBL_DIG
51#  undef FLT_MIN_EXP
52#  undef DBL_MIN_EXP
53#  undef LDBL_MIN_EXP
54#  undef FLT_MIN_10_EXP
55#  undef DBL_MIN_10_EXP
56#  undef LDBL_MIN_10_EXP
57#  undef FLT_MAX_EXP
58#  undef DBL_MAX_EXP
59#  undef LDBL_MAX_EXP
60#  undef FLT_MAX_10_EXP
61#  undef DBL_MAX_10_EXP
62#  undef LDBL_MAX_10_EXP
63#  undef FLT_MAX
64#  undef DBL_MAX
65#  undef LDBL_MAX
66#  undef FLT_EPSILON
67#  undef DBL_EPSILON
68#  undef LDBL_EPSILON
69#  undef FLT_MIN
70#  undef DBL_MIN
71#  undef LDBL_MIN
72#  if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__)
73#    undef FLT_TRUE_MIN
74#    undef DBL_TRUE_MIN
75#    undef LDBL_TRUE_MIN
76#    undef FLT_DECIMAL_DIG
77#    undef DBL_DECIMAL_DIG
78#    undef LDBL_DECIMAL_DIG
79#  endif
80#endif
81
82/* Characteristics of floating point types, C99 5.2.4.2.2 */
83
84#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
85#define FLT_ROUNDS (__builtin_flt_rounds())
86#define FLT_RADIX __FLT_RADIX__
87
88#define FLT_MANT_DIG __FLT_MANT_DIG__
89#define DBL_MANT_DIG __DBL_MANT_DIG__
90#define LDBL_MANT_DIG __LDBL_MANT_DIG__
91
92#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__)
93#  define DECIMAL_DIG __DECIMAL_DIG__
94#endif
95
96#define FLT_DIG __FLT_DIG__
97#define DBL_DIG __DBL_DIG__
98#define LDBL_DIG __LDBL_DIG__
99
100#define FLT_MIN_EXP __FLT_MIN_EXP__
101#define DBL_MIN_EXP __DBL_MIN_EXP__
102#define LDBL_MIN_EXP __LDBL_MIN_EXP__
103
104#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
105#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
106#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
107
108#define FLT_MAX_EXP __FLT_MAX_EXP__
109#define DBL_MAX_EXP __DBL_MAX_EXP__
110#define LDBL_MAX_EXP __LDBL_MAX_EXP__
111
112#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
113#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
114#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
115
116#define FLT_MAX __FLT_MAX__
117#define DBL_MAX __DBL_MAX__
118#define LDBL_MAX __LDBL_MAX__
119
120#define FLT_EPSILON __FLT_EPSILON__
121#define DBL_EPSILON __DBL_EPSILON__
122#define LDBL_EPSILON __LDBL_EPSILON__
123
124#define FLT_MIN __FLT_MIN__
125#define DBL_MIN __DBL_MIN__
126#define LDBL_MIN __LDBL_MIN__
127
128#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__)
129#  define FLT_TRUE_MIN __FLT_DENORM_MIN__
130#  define DBL_TRUE_MIN __DBL_DENORM_MIN__
131#  define LDBL_TRUE_MIN __LDBL_DENORM_MIN__
132#  define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__
133#  define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__
134#  define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__
135#endif
136
137#endif /* __FLOAT_H */
138