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)) && \ 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