float.h revision 344779
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 __CLANG_FLOAT_H 25#define __CLANG_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# undef FLT_HAS_SUBNORM 89# undef DBL_HAS_SUBNORM 90# undef LDBL_HAS_SUBNORM 91# endif 92#endif 93 94/* Characteristics of floating point types, C99 5.2.4.2.2 */ 95 96#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__ 97#define FLT_ROUNDS (__builtin_flt_rounds()) 98#define FLT_RADIX __FLT_RADIX__ 99 100#define FLT_MANT_DIG __FLT_MANT_DIG__ 101#define DBL_MANT_DIG __DBL_MANT_DIG__ 102#define LDBL_MANT_DIG __LDBL_MANT_DIG__ 103 104#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) 105# define DECIMAL_DIG __DECIMAL_DIG__ 106#endif 107 108#define FLT_DIG __FLT_DIG__ 109#define DBL_DIG __DBL_DIG__ 110#define LDBL_DIG __LDBL_DIG__ 111 112#define FLT_MIN_EXP __FLT_MIN_EXP__ 113#define DBL_MIN_EXP __DBL_MIN_EXP__ 114#define LDBL_MIN_EXP __LDBL_MIN_EXP__ 115 116#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__ 117#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__ 118#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__ 119 120#define FLT_MAX_EXP __FLT_MAX_EXP__ 121#define DBL_MAX_EXP __DBL_MAX_EXP__ 122#define LDBL_MAX_EXP __LDBL_MAX_EXP__ 123 124#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__ 125#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__ 126#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__ 127 128#define FLT_MAX __FLT_MAX__ 129#define DBL_MAX __DBL_MAX__ 130#define LDBL_MAX __LDBL_MAX__ 131 132#define FLT_EPSILON __FLT_EPSILON__ 133#define DBL_EPSILON __DBL_EPSILON__ 134#define LDBL_EPSILON __LDBL_EPSILON__ 135 136#define FLT_MIN __FLT_MIN__ 137#define DBL_MIN __DBL_MIN__ 138#define LDBL_MIN __LDBL_MIN__ 139 140#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) 141# define FLT_TRUE_MIN __FLT_DENORM_MIN__ 142# define DBL_TRUE_MIN __DBL_DENORM_MIN__ 143# define LDBL_TRUE_MIN __LDBL_DENORM_MIN__ 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# define FLT_HAS_SUBNORM __FLT_HAS_DENORM__ 148# define DBL_HAS_SUBNORM __DBL_HAS_DENORM__ 149# define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__ 150#endif 151 152#ifdef __STDC_WANT_IEC_60559_TYPES_EXT__ 153# define FLT16_MANT_DIG __FLT16_MANT_DIG__ 154# define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__ 155# define FLT16_DIG __FLT16_DIG__ 156# define FLT16_MIN_EXP __FLT16_MIN_EXP__ 157# define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__ 158# define FLT16_MAX_EXP __FLT16_MAX_EXP__ 159# define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__ 160# define FLT16_MAX __FLT16_MAX__ 161# define FLT16_EPSILON __FLT16_EPSILON__ 162# define FLT16_MIN __FLT16_MIN__ 163# define FLT16_TRUE_MIN __FLT16_TRUE_MIN__ 164#endif /* __STDC_WANT_IEC_60559_TYPES_EXT__ */ 165 166#endif /* __CLANG_FLOAT_H */ 167