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 | |
206 | |