dhcpd-pools  2.28
ISC dhcpd lease usage analyser
float.in.h
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1 /* A correct <float.h>.
2 
3  Copyright (C) 2007-2015 Free Software Foundation, Inc.
4 
5  This program is free software: you can redistribute it and/or modify
6  it under the terms of the GNU General Public License as published by
7  the Free Software Foundation; either version 3 of the License, or
8  (at your option) any later version.
9 
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  GNU General Public License for more details.
14 
15  You should have received a copy of the GNU General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 
18 #ifndef _@GUARD_PREFIX@_FLOAT_H
19 
20 #if __GNUC__ >= 3
21 @PRAGMA_SYSTEM_HEADER@
22 #endif
23 @PRAGMA_COLUMNS@
24 
25 /* The include_next requires a split double-inclusion guard. */
26 #@INCLUDE_NEXT@ @NEXT_FLOAT_H@
27 
28 #ifndef _@GUARD_PREFIX@_FLOAT_H
29 #define _@GUARD_PREFIX@_FLOAT_H
30 
31 /* 'long double' properties. */
32 
33 #if defined __i386__ && (defined __BEOS__ || defined __OpenBSD__)
34 /* Number of mantissa units, in base FLT_RADIX. */
35 # undef LDBL_MANT_DIG
36 # define LDBL_MANT_DIG 64
37 /* Number of decimal digits that is sufficient for representing a number. */
38 # undef LDBL_DIG
39 # define LDBL_DIG 18
40 /* x-1 where x is the smallest representable number > 1. */
41 # undef LDBL_EPSILON
42 # define LDBL_EPSILON 1.0842021724855044340E-19L
43 /* Minimum e such that FLT_RADIX^(e-1) is a normalized number. */
44 # undef LDBL_MIN_EXP
45 # define LDBL_MIN_EXP (-16381)
46 /* Maximum e such that FLT_RADIX^(e-1) is a representable finite number. */
47 # undef LDBL_MAX_EXP
48 # define LDBL_MAX_EXP 16384
49 /* Minimum positive normalized number. */
50 # undef LDBL_MIN
51 # define LDBL_MIN 3.3621031431120935063E-4932L
52 /* Maximum representable finite number. */
53 # undef LDBL_MAX
54 # define LDBL_MAX 1.1897314953572317650E+4932L
55 /* Minimum e such that 10^e is in the range of normalized numbers. */
56 # undef LDBL_MIN_10_EXP
57 # define LDBL_MIN_10_EXP (-4931)
58 /* Maximum e such that 10^e is in the range of representable finite numbers. */
59 # undef LDBL_MAX_10_EXP
60 # define LDBL_MAX_10_EXP 4932
61 #endif
62 
63 /* On FreeBSD/x86 6.4, the 'long double' type really has only 53 bits of
64  precision in the compiler but 64 bits of precision at runtime. See
65  <http://lists.gnu.org/archive/html/bug-gnulib/2008-07/msg00063.html>. */
66 #if defined __i386__ && defined __FreeBSD__
67 /* Number of mantissa units, in base FLT_RADIX. */
68 # undef LDBL_MANT_DIG
69 # define LDBL_MANT_DIG 64
70 /* Number of decimal digits that is sufficient for representing a number. */
71 # undef LDBL_DIG
72 # define LDBL_DIG 18
73 /* x-1 where x is the smallest representable number > 1. */
74 # undef LDBL_EPSILON
75 # define LDBL_EPSILON 1.084202172485504434007452800869941711426e-19L /* 2^-63 */
76 /* Minimum e such that FLT_RADIX^(e-1) is a normalized number. */
77 # undef LDBL_MIN_EXP
78 # define LDBL_MIN_EXP (-16381)
79 /* Maximum e such that FLT_RADIX^(e-1) is a representable finite number. */
80 # undef LDBL_MAX_EXP
81 # define LDBL_MAX_EXP 16384
82 /* Minimum positive normalized number. */
83 # undef LDBL_MIN
84 # define LDBL_MIN 3.3621031431120935E-4932L /* = 0x1p-16382L */
85 /* Maximum representable finite number. */
86 # undef LDBL_MAX
87 /* LDBL_MAX is represented as { 0xFFFFFFFF, 0xFFFFFFFF, 32766 }.
88  But the largest literal that GCC allows us to write is
89  0x0.fffffffffffff8p16384L = { 0xFFFFF800, 0xFFFFFFFF, 32766 }.
90  So, define it like this through a reference to an external variable
91 
92  const unsigned int LDBL_MAX[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 32766 };
93  extern const long double LDBL_MAX;
94 
95  Unfortunately, this is not a constant expression. */
96 union gl_long_double_union
97  {
98  struct { unsigned int lo; unsigned int hi; unsigned int exponent; } xd;
99  long double ld;
100  };
101 extern const union gl_long_double_union gl_LDBL_MAX;
102 # define LDBL_MAX (gl_LDBL_MAX.ld)
103 /* Minimum e such that 10^e is in the range of normalized numbers. */
104 # undef LDBL_MIN_10_EXP
105 # define LDBL_MIN_10_EXP (-4931)
106 /* Maximum e such that 10^e is in the range of representable finite numbers. */
107 # undef LDBL_MAX_10_EXP
108 # define LDBL_MAX_10_EXP 4932
109 #endif
110 
111 /* On AIX 7.1 with gcc 4.2, the values of LDBL_MIN_EXP, LDBL_MIN, LDBL_MAX are
112  wrong.
113  On Linux/PowerPC with gcc 4.4, the value of LDBL_MAX is wrong. */
114 #if (defined _ARCH_PPC || defined _POWER) && defined _AIX && (LDBL_MANT_DIG == 106) && defined __GNUC__
115 # undef LDBL_MIN_EXP
116 # define LDBL_MIN_EXP DBL_MIN_EXP
117 # undef LDBL_MIN_10_EXP
118 # define LDBL_MIN_10_EXP DBL_MIN_10_EXP
119 # undef LDBL_MIN
120 # define LDBL_MIN 2.22507385850720138309023271733240406422e-308L /* DBL_MIN = 2^-1022 */
121 #endif
122 #if (defined _ARCH_PPC || defined _POWER) && (defined _AIX || defined __linux__) && (LDBL_MANT_DIG == 106) && defined __GNUC__
123 # undef LDBL_MAX
124 /* LDBL_MAX is represented as { 0x7FEFFFFF, 0xFFFFFFFF, 0x7C8FFFFF, 0xFFFFFFFF }.
125  It is not easy to define:
126  #define LDBL_MAX 1.79769313486231580793728971405302307166e308L
127  is too small, whereas
128  #define LDBL_MAX 1.79769313486231580793728971405302307167e308L
129  is too large. Apparently a bug in GCC decimal-to-binary conversion.
130  Also, I can't get values larger than
131  #define LDBL63 ((long double) (1ULL << 63))
132  #define LDBL882 (LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63)
133  #define LDBL945 (LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63)
134  #define LDBL1008 (LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63)
135  #define LDBL_MAX (LDBL1008 * 65535.0L + LDBL945 * (long double) 9223372036821221375ULL + LDBL882 * (long double) 4611686018427387904ULL)
136  which is represented as { 0x7FEFFFFF, 0xFFFFFFFF, 0x7C8FFFFF, 0xF8000000 }.
137  So, define it like this through a reference to an external variable
138 
139  const double LDBL_MAX[2] = { DBL_MAX, DBL_MAX / (double)134217728UL / (double)134217728UL };
140  extern const long double LDBL_MAX;
141 
142  or through a pointer cast
143 
144  #define LDBL_MAX \
145  (*(const long double *) (double[]) { DBL_MAX, DBL_MAX / (double)134217728UL / (double)134217728UL })
146 
147  Unfortunately, this is not a constant expression, and the latter expression
148  does not work well when GCC is optimizing.. */
149 union gl_long_double_union
150  {
151  struct { double hi; double lo; } dd;
152  long double ld;
153  };
154 extern const union gl_long_double_union gl_LDBL_MAX;
155 # define LDBL_MAX (gl_LDBL_MAX.ld)
156 #endif
157 
158 /* On IRIX 6.5, with cc, the value of LDBL_MANT_DIG is wrong.
159  On IRIX 6.5, with gcc 4.2, the values of LDBL_MIN_EXP, LDBL_MIN, LDBL_EPSILON
160  are wrong. */
161 #if defined __sgi && (LDBL_MANT_DIG >= 106)
162 # undef LDBL_MANT_DIG
163 # define LDBL_MANT_DIG 106
164 # if defined __GNUC__
165 # undef LDBL_MIN_EXP
166 # define LDBL_MIN_EXP DBL_MIN_EXP
167 # undef LDBL_MIN_10_EXP
168 # define LDBL_MIN_10_EXP DBL_MIN_10_EXP
169 # undef LDBL_MIN
170 # define LDBL_MIN 2.22507385850720138309023271733240406422e-308L /* DBL_MIN = 2^-1022 */
171 # undef LDBL_EPSILON
172 # define LDBL_EPSILON 2.46519032881566189191165176650870696773e-32L /* 2^-105 */
173 # endif
174 #endif
175 
176 #if @REPLACE_ITOLD@
177 /* Pull in a function that fixes the 'int' to 'long double' conversion
178  of glibc 2.7. */
179 extern
180 # ifdef __cplusplus
181 "C"
182 # endif
183 void _Qp_itoq (long double *, int);
184 static void (*_gl_float_fix_itold) (long double *, int) = _Qp_itoq;
185 #endif
186 
187 #endif /* _@GUARD_PREFIX@_FLOAT_H */
188 #endif /* _@GUARD_PREFIX@_FLOAT_H */
void _Qp_itoq(long double *result, int a)
Definition: itold.c:24