| Qiwen Zhao | c26fdd1 | 2014-10-14 11:54:17 -0700 | [diff] [blame] | 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 */ |