| 1 | /* Copyright (c) 2017 Apple Inc. All rights reserved. |
| 2 | * |
| 3 | * @APPLE_LICENSE_HEADER_START@ |
| 4 | * |
| 5 | * The contents of this file constitute Original Code as defined in and |
| 6 | * are subject to the Apple Public Source License Version 1.1 (the |
| 7 | * "License"). You may not use this file except in compliance with the |
| 8 | * License. Please obtain a copy of the License at |
| 9 | * http://www.apple.com/publicsource and read it before using this file. |
| 10 | * |
| 11 | * This Original Code and all software distributed under the License are |
| 12 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| 13 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 14 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| 15 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| 16 | * License for the specific language governing rights and limitations |
| 17 | * under the License. |
| 18 | * |
| 19 | * @APPLE_LICENSE_HEADER_END@ |
| 20 | */ |
| 21 | |
| 22 | #ifndef __FLOAT_H |
| 23 | #define __FLOAT_H |
| 24 | |
| 25 | #if !defined(__has_feature) || !__has_feature(modules) |
| 26 | /* clang's float.h comes before this header in the search order. It |
| 27 | * will include this header first, undef all of these macros, and then |
| 28 | * redeclare them. That doesn't work when the two headers are in |
| 29 | * different clang modules. The only way to avoid redeclaration errors |
| 30 | * is to not declare the macros here, and let clang's float.h handle |
| 31 | * them. |
| 32 | */ |
| 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 | #undef FLT_DIG |
| 42 | #undef DBL_DIG |
| 43 | #undef LDBL_DIG |
| 44 | #undef FLT_MIN_EXP |
| 45 | #undef DBL_MIN_EXP |
| 46 | #undef LDBL_MIN_EXP |
| 47 | #undef FLT_MIN_10_EXP |
| 48 | #undef DBL_MIN_10_EXP |
| 49 | #undef LDBL_MIN_10_EXP |
| 50 | #undef FLT_MAX_EXP |
| 51 | #undef DBL_MAX_EXP |
| 52 | #undef LDBL_MAX_EXP |
| 53 | #undef FLT_MAX_10_EXP |
| 54 | #undef DBL_MAX_10_EXP |
| 55 | #undef LDBL_MAX_10_EXP |
| 56 | #undef FLT_MAX |
| 57 | #undef DBL_MAX |
| 58 | #undef LDBL_MAX |
| 59 | #undef FLT_EPSILON |
| 60 | #undef DBL_EPSILON |
| 61 | #undef LDBL_EPSILON |
| 62 | #undef FLT_MIN |
| 63 | #undef DBL_MIN |
| 64 | #undef LDBL_MIN |
| 65 | |
| 66 | #if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) |
| 67 | # undef DECIMAL_DIG |
| 68 | #endif |
| 69 | |
| 70 | #if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) |
| 71 | # undef FLT_HAS_SUBNORM |
| 72 | # undef DBL_HAS_SUBNORM |
| 73 | # undef LDBL_HAS_SUBNORM |
| 74 | # undef FLT_TRUE_MIN |
| 75 | # undef DBL_TRUE_MIN |
| 76 | # undef LDBL_TRUE_MIN |
| 77 | # undef FLT_DECIMAL_DIG |
| 78 | # undef DBL_DECIMAL_DIG |
| 79 | # undef LDBL_DECIMAL_DIG |
| 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 | #define FLT_DIG __FLT_DIG__ |
| 93 | #define DBL_DIG __DBL_DIG__ |
| 94 | #define LDBL_DIG __LDBL_DIG__ |
| 95 | |
| 96 | #define FLT_MIN_EXP __FLT_MIN_EXP__ |
| 97 | #define DBL_MIN_EXP __DBL_MIN_EXP__ |
| 98 | #define LDBL_MIN_EXP __LDBL_MIN_EXP__ |
| 99 | |
| 100 | #define FLT_MIN_10_EXP __FLT_MIN_10_EXP__ |
| 101 | #define DBL_MIN_10_EXP __DBL_MIN_10_EXP__ |
| 102 | #define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__ |
| 103 | |
| 104 | #define FLT_MAX_EXP __FLT_MAX_EXP__ |
| 105 | #define DBL_MAX_EXP __DBL_MAX_EXP__ |
| 106 | #define LDBL_MAX_EXP __LDBL_MAX_EXP__ |
| 107 | |
| 108 | #define FLT_MAX_10_EXP __FLT_MAX_10_EXP__ |
| 109 | #define DBL_MAX_10_EXP __DBL_MAX_10_EXP__ |
| 110 | #define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__ |
| 111 | |
| 112 | #define FLT_MAX __FLT_MAX__ |
| 113 | #define DBL_MAX __DBL_MAX__ |
| 114 | #define LDBL_MAX __LDBL_MAX__ |
| 115 | |
| 116 | #define FLT_EPSILON __FLT_EPSILON__ |
| 117 | #define DBL_EPSILON __DBL_EPSILON__ |
| 118 | #define LDBL_EPSILON __LDBL_EPSILON__ |
| 119 | |
| 120 | #define FLT_MIN __FLT_MIN__ |
| 121 | #define DBL_MIN __DBL_MIN__ |
| 122 | #define LDBL_MIN __LDBL_MIN__ |
| 123 | |
| 124 | #if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) |
| 125 | # define DECIMAL_DIG __DECIMAL_DIG__ |
| 126 | #endif |
| 127 | |
| 128 | #if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) |
| 129 | # if defined __arm__ /* On 32-bit arm, denorms are not supported. */ |
| 130 | # define FLT_HAS_SUBNORM 0 |
| 131 | # define DBL_HAS_SUBNORM 0 |
| 132 | # define LDBL_HAS_SUBNORM 0 |
| 133 | # define FLT_TRUE_MIN __FLT_MIN__ |
| 134 | # define DBL_TRUE_MIN __DBL_MIN__ |
| 135 | # define LDBL_TRUE_MIN __LDBL_MIN__ |
| 136 | # else /* All Apple platforms except 32-bit arm have denorms. */ |
| 137 | # define FLT_HAS_SUBNORM 1 |
| 138 | # define DBL_HAS_SUBNORM 1 |
| 139 | # define LDBL_HAS_SUBNORM 1 |
| 140 | # define FLT_TRUE_MIN __FLT_DENORM_MIN__ |
| 141 | # define DBL_TRUE_MIN __DBL_DENORM_MIN__ |
| 142 | # define LDBL_TRUE_MIN __LDBL_DENORM_MIN__ |
| 143 | # endif |
| 144 | # define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__ |
| 145 | # define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__ |
| 146 | # define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__ |
| 147 | #endif |
| 148 | |
| 149 | #endif /* !__has_feature(modules) */ |
| 150 | |
| 151 | #endif /* __FLOAT_H */ |