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 37 /* Prior to Apple's 10.7 SDK, float.h SDK header used to apply an extra level 38 * of #include_next<float.h> to keep Metrowerks compilers happy. Avoid this 39 * extra indirection. 40 */ 41 #ifdef __APPLE__ 42 #define _FLOAT_H_ 43 #endif 44 45 # include_next <float.h> 46 47 /* Undefine anything that we'll be redefining below. */ 48 # undef FLT_EVAL_METHOD 49 # undef FLT_ROUNDS 50 # undef FLT_RADIX 51 # undef FLT_MANT_DIG 52 # undef DBL_MANT_DIG 53 # undef LDBL_MANT_DIG 54 # if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) 55 # undef DECIMAL_DIG 56 # endif 57 # undef FLT_DIG 58 # undef DBL_DIG 59 # undef LDBL_DIG 60 # undef FLT_MIN_EXP 61 # undef DBL_MIN_EXP 62 # undef LDBL_MIN_EXP 63 # undef FLT_MIN_10_EXP 64 # undef DBL_MIN_10_EXP 65 # undef LDBL_MIN_10_EXP 66 # undef FLT_MAX_EXP 67 # undef DBL_MAX_EXP 68 # undef LDBL_MAX_EXP 69 # undef FLT_MAX_10_EXP 70 # undef DBL_MAX_10_EXP 71 # undef LDBL_MAX_10_EXP 72 # undef FLT_MAX 73 # undef DBL_MAX 74 # undef LDBL_MAX 75 # undef FLT_EPSILON 76 # undef DBL_EPSILON 77 # undef LDBL_EPSILON 78 # undef FLT_MIN 79 # undef DBL_MIN 80 # undef LDBL_MIN 81 # if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) 82 # undef FLT_TRUE_MIN 83 # undef DBL_TRUE_MIN 84 # undef LDBL_TRUE_MIN 85 # undef FLT_DECIMAL_DIG 86 # undef DBL_DECIMAL_DIG 87 # undef LDBL_DECIMAL_DIG 88 # endif 89 #endif 90 91 /* Characteristics of floating point types, C99 5.2.4.2.2 */ 92 93 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__ 94 #define FLT_ROUNDS (__builtin_flt_rounds()) 95 #define FLT_RADIX __FLT_RADIX__ 96 97 #define FLT_MANT_DIG __FLT_MANT_DIG__ 98 #define DBL_MANT_DIG __DBL_MANT_DIG__ 99 #define LDBL_MANT_DIG __LDBL_MANT_DIG__ 100 101 #if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) 102 # define DECIMAL_DIG __DECIMAL_DIG__ 103 #endif 104 105 #define FLT_DIG __FLT_DIG__ 106 #define DBL_DIG __DBL_DIG__ 107 #define LDBL_DIG __LDBL_DIG__ 108 109 #define FLT_MIN_EXP __FLT_MIN_EXP__ 110 #define DBL_MIN_EXP __DBL_MIN_EXP__ 111 #define LDBL_MIN_EXP __LDBL_MIN_EXP__ 112 113 #define FLT_MIN_10_EXP __FLT_MIN_10_EXP__ 114 #define DBL_MIN_10_EXP __DBL_MIN_10_EXP__ 115 #define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__ 116 117 #define FLT_MAX_EXP __FLT_MAX_EXP__ 118 #define DBL_MAX_EXP __DBL_MAX_EXP__ 119 #define LDBL_MAX_EXP __LDBL_MAX_EXP__ 120 121 #define FLT_MAX_10_EXP __FLT_MAX_10_EXP__ 122 #define DBL_MAX_10_EXP __DBL_MAX_10_EXP__ 123 #define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__ 124 125 #define FLT_MAX __FLT_MAX__ 126 #define DBL_MAX __DBL_MAX__ 127 #define LDBL_MAX __LDBL_MAX__ 128 129 #define FLT_EPSILON __FLT_EPSILON__ 130 #define DBL_EPSILON __DBL_EPSILON__ 131 #define LDBL_EPSILON __LDBL_EPSILON__ 132 133 #define FLT_MIN __FLT_MIN__ 134 #define DBL_MIN __DBL_MIN__ 135 #define LDBL_MIN __LDBL_MIN__ 136 137 #if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) 138 # define FLT_TRUE_MIN __FLT_DENORM_MIN__ 139 # define DBL_TRUE_MIN __DBL_DENORM_MIN__ 140 # define LDBL_TRUE_MIN __LDBL_DENORM_MIN__ 141 # define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__ 142 # define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__ 143 # define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__ 144 #endif 145 146 #ifdef __STDC_WANT_IEC_60559_TYPES_EXT__ 147 # define FLT16_MANT_DIG __FLT16_MANT_DIG__ 148 # define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__ 149 # define FLT16_DIG __FLT16_DIG__ 150 # define FLT16_MIN_EXP __FLT16_MIN_EXP__ 151 # define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__ 152 # define FLT16_MAX_EXP __FLT16_MAX_EXP__ 153 # define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__ 154 # define FLT16_MAX __FLT16_MAX__ 155 # define FLT16_EPSILON __FLT16_EPSILON__ 156 # define FLT16_MIN __FLT16_MIN__ 157 # define FLT16_TRUE_MIN __FLT16_TRUE_MIN__ 158 #endif /* __STDC_WANT_IEC_60559_TYPES_EXT__ */ 159 160 #endif /* __FLOAT_H */ 161