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1 | /**************************************************************************** |
2 | ** | |
3 | ** Copyright (C) 2017 Intel Corporation | |
4 | ** | |
5 | ** Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | ** of this software and associated documentation files (the "Software"), to deal | |
7 | ** in the Software without restriction, including without limitation the rights | |
8 | ** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | ** copies of the Software, and to permit persons to whom the Software is | |
10 | ** furnished to do so, subject to the following conditions: | |
11 | ** | |
12 | ** The above copyright notice and this permission notice shall be included in | |
13 | ** all copies or substantial portions of the Software. | |
14 | ** | |
15 | ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | ** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | ** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | ** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | ** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | ** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
21 | ** THE SOFTWARE. | |
22 | ** | |
23 | ****************************************************************************/ | |
24 | ||
25 | #ifndef COMPILERSUPPORT_H | |
26 | #define COMPILERSUPPORT_H | |
27 | ||
28 | #include "cbor.h" | |
29 | ||
30 | #ifndef _BSD_SOURCE | |
31 | # define _BSD_SOURCE | |
32 | #endif | |
33 | #ifndef _DEFAULT_SOURCE | |
34 | # define _DEFAULT_SOURCE | |
35 | #endif | |
36 | #ifndef assert | |
37 | # include <assert.h> | |
38 | #endif | |
39 | #include <stddef.h> | |
40 | #include <stdint.h> | |
41 | #include <string.h> | |
42 | ||
43 | #ifndef __cplusplus | |
44 | # include <stdbool.h> | |
45 | #endif | |
46 | ||
47 | #if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L || __cpp_static_assert >= 200410 | |
48 | # define cbor_static_assert(x) static_assert(x, #x) | |
49 | #elif !defined(__cplusplus) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 406) && (__STDC_VERSION__ > 199901L) | |
50 | # define cbor_static_assert(x) _Static_assert(x, #x) | |
51 | #else | |
52 | # define cbor_static_assert(x) ((void)sizeof(char[2*!!(x) - 1])) | |
53 | #endif | |
54 | #if __STDC_VERSION__ >= 199901L || defined(__cplusplus) | |
55 | /* inline is a keyword */ | |
56 | #else | |
57 | /* use the definition from cbor.h */ | |
58 | # define inline CBOR_INLINE | |
59 | #endif | |
60 | ||
61 | #ifdef NDEBUG | |
62 | # define cbor_assert(cond) do { if (!(cond)) unreachable(); } while (0) | |
63 | #else | |
64 | # define cbor_assert(cond) assert(cond) | |
65 | #endif | |
66 | ||
67 | #ifndef STRINGIFY | |
68 | #define STRINGIFY(x) STRINGIFY2(x) | |
69 | #endif | |
70 | #define STRINGIFY2(x) #x | |
71 | ||
72 | #if !defined(UINT32_MAX) || !defined(INT64_MAX) | |
73 | /* C89? We can define UINT32_MAX portably, but not INT64_MAX */ | |
74 | # error "Your system has stdint.h but that doesn't define UINT32_MAX or INT64_MAX" | |
75 | #endif | |
76 | ||
77 | #ifndef DBL_DECIMAL_DIG | |
78 | /* DBL_DECIMAL_DIG is C11 */ | |
79 | # define DBL_DECIMAL_DIG 17 | |
80 | #endif | |
81 | #define DBL_DECIMAL_DIG_STR STRINGIFY(DBL_DECIMAL_DIG) | |
82 | ||
83 | #if defined(__GNUC__) && defined(__i386__) && !defined(__iamcu__) | |
84 | # define CBOR_INTERNAL_API_CC __attribute__((regparm(3))) | |
85 | #elif defined(_MSC_VER) && defined(_M_IX86) | |
86 | # define CBOR_INTERNAL_API_CC __fastcall | |
87 | #else | |
88 | # define CBOR_INTERNAL_API_CC | |
89 | #endif | |
90 | ||
91 | #ifndef __has_builtin | |
92 | # define __has_builtin(x) 0 | |
93 | #endif | |
94 | ||
95 | #if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)) || \ | |
96 | (__has_builtin(__builtin_bswap64) && __has_builtin(__builtin_bswap32)) | |
97 | # if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ | |
98 | # define cbor_ntohll __builtin_bswap64 | |
99 | # define cbor_htonll __builtin_bswap64 | |
100 | # define cbor_ntohl __builtin_bswap32 | |
101 | # define cbor_htonl __builtin_bswap32 | |
102 | # ifdef __INTEL_COMPILER | |
103 | # define cbor_ntohs _bswap16 | |
104 | # define cbor_htons _bswap16 | |
105 | # elif (__GNUC__ * 100 + __GNUC_MINOR__ >= 608) || __has_builtin(__builtin_bswap16) | |
106 | # define cbor_ntohs __builtin_bswap16 | |
107 | # define cbor_htons __builtin_bswap16 | |
108 | # else | |
109 | # define cbor_ntohs(x) (((uint16_t)(x) >> 8) | ((uint16_t)(x) << 8)) | |
110 | # define cbor_htons cbor_ntohs | |
111 | # endif | |
112 | # else | |
113 | # define cbor_ntohll | |
114 | # define cbor_htonll | |
115 | # define cbor_ntohl | |
116 | # define cbor_htonl | |
117 | # define cbor_ntohs | |
118 | # define cbor_htons | |
119 | # endif | |
120 | #elif defined(__sun) | |
121 | # include <sys/byteorder.h> | |
122 | #elif defined(_MSC_VER) | |
123 | /* MSVC, which implies Windows, which implies little-endian and sizeof(long) == 4 */ | |
124 | # include <stdlib.h> | |
125 | # define cbor_ntohll _byteswap_uint64 | |
126 | # define cbor_htonll _byteswap_uint64 | |
127 | # define cbor_ntohl _byteswap_ulong | |
128 | # define cbor_htonl _byteswap_ulong | |
129 | # define cbor_ntohs _byteswap_ushort | |
130 | # define cbor_htons _byteswap_ushort | |
131 | #endif | |
132 | #ifndef cbor_ntohs | |
133 | # include <arpa/inet.h> | |
134 | # define cbor_ntohs ntohs | |
135 | # define cbor_htons htons | |
136 | #endif | |
137 | #ifndef cbor_ntohl | |
138 | # include <arpa/inet.h> | |
139 | # define cbor_ntohl ntohl | |
140 | # define cbor_htonl htonl | |
141 | #endif | |
142 | #ifndef cbor_ntohll | |
143 | # define cbor_ntohll ntohll | |
144 | # define cbor_htonll htonll | |
145 | /* ntohll isn't usually defined */ | |
146 | # ifndef ntohll | |
147 | # if (defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) || \ | |
148 | (defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && __BYTE_ORDER == __BIG_ENDIAN) || \ | |
149 | (defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN) || \ | |
150 | (defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)) || (defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__)) || \ | |
151 | defined(__ARMEB__) || defined(__MIPSEB__) || defined(__s390__) || defined(__sparc__) | |
152 | # define ntohll | |
153 | # define htonll | |
154 | # elif (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || \ | |
155 | (defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && __BYTE_ORDER == __LITTLE_ENDIAN) || \ | |
156 | (defined(BYTE_ORDER) && defined(LITTLE_ENDIAN) && BYTE_ORDER == LITTLE_ENDIAN) || \ | |
157 | defined(_LITTLE_ENDIAN) || defined(__LITTLE_ENDIAN__) || defined(__ARMEL__) || defined(__MIPSEL__) || \ | |
158 | defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__) || defined(__amd64) | |
159 | # define ntohll(x) ((ntohl((uint32_t)(x)) * UINT64_C(0x100000000)) + (ntohl((x) >> 32))) | |
160 | # define htonll ntohll | |
161 | # else | |
162 | # error "Unable to determine byte order!" | |
163 | # endif | |
164 | # endif | |
165 | #endif | |
166 | ||
167 | ||
168 | #ifdef __cplusplus | |
169 | # define CONST_CAST(t, v) const_cast<t>(v) | |
170 | #else | |
171 | /* C-style const_cast without triggering a warning with -Wcast-qual */ | |
172 | # define CONST_CAST(t, v) (t)(uintptr_t)(v) | |
173 | #endif | |
174 | ||
175 | #ifdef __GNUC__ | |
176 | #ifndef likely | |
177 | # define likely(x) __builtin_expect(!!(x), 1) | |
178 | #endif | |
179 | #ifndef unlikely | |
180 | # define unlikely(x) __builtin_expect(!!(x), 0) | |
181 | #endif | |
182 | # define unreachable() __builtin_unreachable() | |
183 | #elif defined(_MSC_VER) | |
184 | # define likely(x) (x) | |
185 | # define unlikely(x) (x) | |
186 | # define unreachable() __assume(0) | |
187 | #else | |
188 | # define likely(x) (x) | |
189 | # define unlikely(x) (x) | |
190 | # define unreachable() do {} while (0) | |
191 | #endif | |
192 | ||
193 | static inline bool add_check_overflow(size_t v1, size_t v2, size_t *r) | |
194 | { | |
195 | #if ((defined(__GNUC__) && (__GNUC__ >= 5)) && !defined(__INTEL_COMPILER)) || __has_builtin(__builtin_add_overflow) | |
196 | return __builtin_add_overflow(v1, v2, r); | |
197 | #else | |
198 | /* unsigned additions are well-defined */ | |
199 | *r = v1 + v2; | |
200 | return v1 > v1 + v2; | |
201 | #endif | |
202 | } | |
203 | ||
204 | #endif /* COMPILERSUPPORT_H */ | |
205 |