float.h revision 322320 
1157602Srwatson/*===---- float.h - Characteristics of floating point types ----------------===
2157602Srwatson *
3157602Srwatson * Permission is hereby granted, free of charge, to any person obtaining a copy
4157602Srwatson * of this software and associated documentation files (the "Software"), to deal
5157602Srwatson * in the Software without restriction, including without limitation the rights
6157602Srwatson * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7157602Srwatson * copies of the Software, and to permit persons to whom the Software is
8157602Srwatson * furnished to do so, subject to the following conditions:
9157602Srwatson *
10157602Srwatson * The above copyright notice and this permission notice shall be included in
11157602Srwatson * all copies or substantial portions of the Software.
12157602Srwatson *
13157602Srwatson * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14157602Srwatson * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15157602Srwatson * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16157602Srwatson * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17157602Srwatson * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18157602Srwatson * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19157602Srwatson * THE SOFTWARE.
20157602Srwatson *
21157602Srwatson *===-----------------------------------------------------------------------===
22157602Srwatson */
23157602Srwatson
24157602Srwatson#ifndef __FLOAT_H
25157602Srwatson#define __FLOAT_H
26157602Srwatson
27157602Srwatson/* If we're on MinGW, fall back to the system's float.h, which might have
28157602Srwatson * additional definitions provided for Windows.
29157602Srwatson * For more details see http://msdn.microsoft.com/en-us/library/y0ybw9fy.aspx
30157602Srwatson *
31157602Srwatson * Also fall back on Darwin to allow additional definitions and
32157602Srwatson * implementation-defined values.
33157602Srwatson */
34157602Srwatson#if (defined(__APPLE__) || (defined(__MINGW32__) || defined(_MSC_VER))) && \
35157602Srwatson    __STDC_HOSTED__ && __has_include_next(<float.h>)
36157602Srwatson
37157602Srwatson/* Prior to Apple's 10.7 SDK, float.h SDK header used to apply an extra level
38157602Srwatson * of #include_next<float.h> to keep Metrowerks compilers happy. Avoid this
39157602Srwatson * extra indirection.
40157602Srwatson */
41157602Srwatson#ifdef __APPLE__
42157602Srwatson#define _FLOAT_H_
43281402Sngie#endif
44157602Srwatson
45157602Srwatson#  include_next <float.h>
46157602Srwatson
47157602Srwatson/* Undefine anything that we'll be redefining below. */
48157602Srwatson#  undef FLT_EVAL_METHOD
49157602Srwatson#  undef FLT_ROUNDS
50157602Srwatson#  undef FLT_RADIX
51157602Srwatson#  undef FLT_MANT_DIG
52157602Srwatson#  undef DBL_MANT_DIG
53157602Srwatson#  undef LDBL_MANT_DIG
54157602Srwatson#  if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__)
55157602Srwatson#    undef DECIMAL_DIG
56157602Srwatson#  endif
57157602Srwatson#  undef FLT_DIG
58157602Srwatson#  undef DBL_DIG
59157602Srwatson#  undef LDBL_DIG
60157602Srwatson#  undef FLT_MIN_EXP
61157602Srwatson#  undef DBL_MIN_EXP
62294125Sngie#  undef LDBL_MIN_EXP
63157602Srwatson#  undef FLT_MIN_10_EXP
64157602Srwatson#  undef DBL_MIN_10_EXP
65157602Srwatson#  undef LDBL_MIN_10_EXP
66157602Srwatson#  undef FLT_MAX_EXP
67157602Srwatson#  undef DBL_MAX_EXP
68157602Srwatson#  undef LDBL_MAX_EXP
69157602Srwatson#  undef FLT_MAX_10_EXP
70157602Srwatson#  undef DBL_MAX_10_EXP
71157602Srwatson#  undef LDBL_MAX_10_EXP
72157602Srwatson#  undef FLT_MAX
73157602Srwatson#  undef DBL_MAX
74157602Srwatson#  undef LDBL_MAX
75157602Srwatson#  undef FLT_EPSILON
76157602Srwatson#  undef DBL_EPSILON
77157602Srwatson#  undef LDBL_EPSILON
78157602Srwatson#  undef FLT_MIN
79157602Srwatson#  undef DBL_MIN
80157602Srwatson#  undef LDBL_MIN
81157602Srwatson#  if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__)
82157602Srwatson#    undef FLT_TRUE_MIN
83157602Srwatson#    undef DBL_TRUE_MIN
84157602Srwatson#    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#endif /* __FLOAT_H */
147