clang 19.0.0git
float.h
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1/*===---- float.h - Characteristics of floating point types ----------------===
2 *
3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 * See https://llvm.org/LICENSE.txt for license information.
5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 *
7 *===-----------------------------------------------------------------------===
8 */
9
10#ifndef __CLANG_FLOAT_H
11#define __CLANG_FLOAT_H
12
13/* If we're on MinGW, fall back to the system's float.h, which might have
14 * additional definitions provided for Windows.
15 * For more details see http://msdn.microsoft.com/en-us/library/y0ybw9fy.aspx
16 *
17 * Also fall back on Darwin and AIX to allow additional definitions and
18 * implementation-defined values.
19 */
20#if (defined(__APPLE__) || defined(__MINGW32__) || defined(_MSC_VER) || \
21 defined(_AIX)) && \
22 __STDC_HOSTED__ && __has_include_next(<float.h>)
23
24/* Prior to Apple's 10.7 SDK, float.h SDK header used to apply an extra level
25 * of #include_next<float.h> to keep Metrowerks compilers happy. Avoid this
26 * extra indirection.
27 */
28#ifdef __APPLE__
29#define _FLOAT_H_
30#endif
31
32# include_next <float.h>
33
34/* Undefine anything that we'll be redefining below. */
35# undef FLT_EVAL_METHOD
36# undef FLT_ROUNDS
37# undef FLT_RADIX
38# undef FLT_MANT_DIG
39# undef DBL_MANT_DIG
40# undef LDBL_MANT_DIG
41#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
42 !defined(__STRICT_ANSI__) || \
43 (defined(__cplusplus) && __cplusplus >= 201103L) || \
44 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
45# undef DECIMAL_DIG
46# endif
47# undef FLT_DIG
48# undef DBL_DIG
49# undef LDBL_DIG
50# undef FLT_MIN_EXP
51# undef DBL_MIN_EXP
52# undef LDBL_MIN_EXP
53# undef FLT_MIN_10_EXP
54# undef DBL_MIN_10_EXP
55# undef LDBL_MIN_10_EXP
56# undef FLT_MAX_EXP
57# undef DBL_MAX_EXP
58# undef LDBL_MAX_EXP
59# undef FLT_MAX_10_EXP
60# undef DBL_MAX_10_EXP
61# undef LDBL_MAX_10_EXP
62# undef FLT_MAX
63# undef DBL_MAX
64# undef LDBL_MAX
65# undef FLT_EPSILON
66# undef DBL_EPSILON
67# undef LDBL_EPSILON
68# undef FLT_MIN
69# undef DBL_MIN
70# undef LDBL_MIN
71#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
72 !defined(__STRICT_ANSI__) || \
73 (defined(__cplusplus) && __cplusplus >= 201703L) || \
74 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
75# undef FLT_TRUE_MIN
76# undef DBL_TRUE_MIN
77# undef LDBL_TRUE_MIN
78# undef FLT_DECIMAL_DIG
79# undef DBL_DECIMAL_DIG
80# undef LDBL_DECIMAL_DIG
81# undef FLT_HAS_SUBNORM
82# undef DBL_HAS_SUBNORM
83# undef LDBL_HAS_SUBNORM
84# endif
85#endif
86
87/* Characteristics of floating point types, C99 5.2.4.2.2 */
88
89#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
90 (defined(__cplusplus) && __cplusplus >= 201103L)
91#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
92#endif
93#define FLT_ROUNDS (__builtin_flt_rounds())
94#define FLT_RADIX __FLT_RADIX__
95
96#define FLT_MANT_DIG __FLT_MANT_DIG__
97#define DBL_MANT_DIG __DBL_MANT_DIG__
98#define LDBL_MANT_DIG __LDBL_MANT_DIG__
99
100#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
101 !defined(__STRICT_ANSI__) || \
102 (defined(__cplusplus) && __cplusplus >= 201103L) || \
103 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
104# define DECIMAL_DIG __DECIMAL_DIG__
105#endif
106
107#define FLT_DIG __FLT_DIG__
108#define DBL_DIG __DBL_DIG__
109#define LDBL_DIG __LDBL_DIG__
110
111#define FLT_MIN_EXP __FLT_MIN_EXP__
112#define DBL_MIN_EXP __DBL_MIN_EXP__
113#define LDBL_MIN_EXP __LDBL_MIN_EXP__
114
115#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
116#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
117#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
118
119#define FLT_MAX_EXP __FLT_MAX_EXP__
120#define DBL_MAX_EXP __DBL_MAX_EXP__
121#define LDBL_MAX_EXP __LDBL_MAX_EXP__
122
123#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
124#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
125#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
126
127#define FLT_MAX __FLT_MAX__
128#define DBL_MAX __DBL_MAX__
129#define LDBL_MAX __LDBL_MAX__
130
131#define FLT_EPSILON __FLT_EPSILON__
132#define DBL_EPSILON __DBL_EPSILON__
133#define LDBL_EPSILON __LDBL_EPSILON__
134
135#define FLT_MIN __FLT_MIN__
136#define DBL_MIN __DBL_MIN__
137#define LDBL_MIN __LDBL_MIN__
138
139#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
140 !defined(__STRICT_ANSI__) || \
141 (defined(__cplusplus) && __cplusplus >= 201703L) || \
142 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
143# define FLT_TRUE_MIN __FLT_DENORM_MIN__
144# define DBL_TRUE_MIN __DBL_DENORM_MIN__
145# define LDBL_TRUE_MIN __LDBL_DENORM_MIN__
146# define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__
147# define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__
148# define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__
149# define FLT_HAS_SUBNORM __FLT_HAS_DENORM__
150# define DBL_HAS_SUBNORM __DBL_HAS_DENORM__
151# define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__
152#endif
153
154#ifdef __STDC_WANT_IEC_60559_TYPES_EXT__
155# define FLT16_MANT_DIG __FLT16_MANT_DIG__
156# define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__
157# define FLT16_DIG __FLT16_DIG__
158# define FLT16_MIN_EXP __FLT16_MIN_EXP__
159# define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__
160# define FLT16_MAX_EXP __FLT16_MAX_EXP__
161# define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__
162# define FLT16_MAX __FLT16_MAX__
163# define FLT16_EPSILON __FLT16_EPSILON__
164# define FLT16_MIN __FLT16_MIN__
165# define FLT16_TRUE_MIN __FLT16_TRUE_MIN__
166#endif /* __STDC_WANT_IEC_60559_TYPES_EXT__ */
167
168#endif /* __CLANG_FLOAT_H */