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