GNU libmicrohttpd  0.9.75
mhd_limits.h
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1 /*
2  This file is part of libmicrohttpd
3  Copyright (C) 2015 Karlson2k (Evgeny Grin)
4 
5  This library is free software; you can redistribute it and/or
6  modify it under the terms of the GNU Lesser General Public
7  License as published by the Free Software Foundation; either
8  version 2.1 of the License, or (at your option) any later version.
9 
10  This library 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 GNU
13  Lesser General Public License for more details.
14 
15  You should have received a copy of the GNU Lesser General Public
16  License along with this library; if not, write to the Free Software
17  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19 
26 #ifndef MHD_LIMITS_H
27 #define MHD_LIMITS_H
28 
29 #include "platform.h"
30 
31 #ifdef HAVE_LIMITS_H
32 #include <limits.h>
33 #endif /* HAVE_LIMITS_H */
34 
35 #define MHD_UNSIGNED_TYPE_MAX_(type) ((type) - 1)
36 /* Assume 8 bits per byte, no padding bits. */
37 #define MHD_SIGNED_TYPE_MAX_(type) \
38  ( (type) ((( ((type) 1) << (sizeof(type) * 8 - 2)) - 1) * 2 + 1) )
39 #define MHD_TYPE_IS_SIGNED_(type) (((type) 0)>((type) - 1))
40 
41 #ifndef UINT_MAX
42 #ifdef __UINT_MAX__
43 #define UINT_MAX __UINT_MAX__
44 #else /* ! __UINT_MAX__ */
45 #define UINT_MAX MHD_UNSIGNED_TYPE_MAX_ (unsigned int)
46 #endif /* ! __UINT_MAX__ */
47 #endif /* !UINT_MAX */
48 
49 #ifndef LONG_MAX
50 #ifdef __LONG_MAX__
51 #define LONG_MAX __LONG_MAX__
52 #else /* ! __LONG_MAX__ */
53 #define LONG_MAX MHD_SIGNED_TYPE_MAX (long)
54 #endif /* ! __LONG_MAX__ */
55 #endif /* !LONG_MAX */
56 
57 #ifndef ULLONG_MAX
58 #ifdef ULONGLONG_MAX
59 #define ULLONG_MAX ULONGLONG_MAX
60 #else /* ! ULONGLONG_MAX */
61 #define ULLONG_MAX MHD_UNSIGNED_TYPE_MAX_ (MHD_UNSIGNED_LONG_LONG)
62 #endif /* ! ULONGLONG_MAX */
63 #endif /* !ULLONG_MAX */
64 
65 #ifndef INT32_MAX
66 #ifdef __INT32_MAX__
67 #define INT32_MAX __INT32_MAX__
68 #else /* ! __INT32_MAX__ */
69 #define INT32_MAX ((int32_t) 0x7FFFFFFF)
70 #endif /* ! __INT32_MAX__ */
71 #endif /* !INT32_MAX */
72 
73 #ifndef UINT32_MAX
74 #ifdef __UINT32_MAX__
75 #define UINT32_MAX __UINT32_MAX__
76 #else /* ! __UINT32_MAX__ */
77 #define UINT32_MAX ((int32_t) 0xFFFFFFFF)
78 #endif /* ! __UINT32_MAX__ */
79 #endif /* !UINT32_MAX */
80 
81 #ifndef UINT64_MAX
82 #ifdef __UINT64_MAX__
83 #define UINT64_MAX __UINT64_MAX__
84 #else /* ! __UINT64_MAX__ */
85 #define UINT64_MAX ((uint64_t) 0xFFFFFFFFFFFFFFFF)
86 #endif /* ! __UINT64_MAX__ */
87 #endif /* !UINT64_MAX */
88 
89 #ifndef INT64_MAX
90 #ifdef __INT64_MAX__
91 #define INT64_MAX __INT64_MAX__
92 #else /* ! __INT64_MAX__ */
93 #define INT64_MAX ((int64_t) 0x7FFFFFFFFFFFFFFF)
94 #endif /* ! __UINT64_MAX__ */
95 #endif /* !INT64_MAX */
96 
97 #ifndef SIZE_MAX
98 #ifdef __SIZE_MAX__
99 #define SIZE_MAX __SIZE_MAX__
100 #elif defined(UINTPTR_MAX)
101 #define SIZE_MAX UINTPTR_MAX
102 #else /* ! __SIZE_MAX__ */
103 #define SIZE_MAX MHD_UNSIGNED_TYPE_MAX_ (size_t)
104 #endif /* ! __SIZE_MAX__ */
105 #endif /* !SIZE_MAX */
106 
107 #ifndef SSIZE_MAX
108 #ifdef __SSIZE_MAX__
109 #define SSIZE_MAX __SSIZE_MAX__
110 #elif defined(INTPTR_MAX)
111 #define SSIZE_MAX INTPTR_MAX
112 #else
113 #define SSIZE_MAX MHD_SIGNED_TYPE_MAX_ (ssize_t)
114 #endif
115 #endif /* ! SSIZE_MAX */
116 
117 #ifndef OFF_T_MAX
118 #ifdef OFF_MAX
119 #define OFF_T_MAX OFF_MAX
120 #elif defined(OFFT_MAX)
121 #define OFF_T_MAX OFFT_MAX
122 #elif defined(__APPLE__) && defined(__MACH__)
123 #define OFF_T_MAX INT64_MAX
124 #else
125 #define OFF_T_MAX MHD_SIGNED_TYPE_MAX_ (off_t)
126 #endif
127 #endif /* !OFF_T_MAX */
128 
129 #if defined(_LARGEFILE64_SOURCE) && ! defined(OFF64_T_MAX)
130 #define OFF64_T_MAX MHD_SIGNED_TYPE_MAX_ (uint64_t)
131 #endif /* _LARGEFILE64_SOURCE && !OFF64_T_MAX */
132 
133 #ifndef TIME_T_MAX
134 #define TIME_T_MAX ((time_t) \
135  (MHD_TYPE_IS_SIGNED_ (time_t) ? \
136  MHD_SIGNED_TYPE_MAX_ (time_t) : \
137  MHD_UNSIGNED_TYPE_MAX_ (time_t)))
138 #endif /* !TIME_T_MAX */
139 
140 #ifndef TIMEVAL_TV_SEC_MAX
141 #ifndef _WIN32
142 #define TIMEVAL_TV_SEC_MAX TIME_T_MAX
143 #else /* _WIN32 */
144 #define TIMEVAL_TV_SEC_MAX LONG_MAX
145 #endif /* _WIN32 */
146 #endif /* !TIMEVAL_TV_SEC_MAX */
147 
148 #endif /* MHD_LIMITS_H */
platform-specific includes for libmicrohttpd