1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
/****************************************************************************
**
** Copyright (C) 2017 Intel Corporation
**
** Permission is hereby granted, free of charge, to any person obtaining a copy
** of this software and associated documentation files (the "Software"), to deal
** in the Software without restriction, including without limitation the rights
** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
** copies of the Software, and to permit persons to whom the Software is
** furnished to do so, subject to the following conditions:
**
** The above copyright notice and this permission notice shall be included in
** all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
** THE SOFTWARE.
**
****************************************************************************/
#ifndef COMPILERSUPPORT_H
#define COMPILERSUPPORT_H
#include "cbor.h"
#ifndef _BSD_SOURCE
# define _BSD_SOURCE
#endif
#ifndef _DEFAULT_SOURCE
# define _DEFAULT_SOURCE
#endif
#ifndef assert
# include <assert.h>
#endif
#include <float.h>
#include <math.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#ifndef __cplusplus
# include <stdbool.h>
#endif
#ifdef __F16C__
# include <immintrin.h>
#endif
#if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L || __cpp_static_assert >= 200410
# define cbor_static_assert(x) static_assert(x, #x)
#elif !defined(__cplusplus) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 406) && (__STDC_VERSION__ > 199901L)
# define cbor_static_assert(x) _Static_assert(x, #x)
#else
# define cbor_static_assert(x) ((void)sizeof(char[2*!!(x) - 1]))
#endif
#if __STDC_VERSION__ >= 199901L || defined(__cplusplus)
/* inline is a keyword */
#else
/* use the definition from cbor.h */
# define inline CBOR_INLINE
#endif
#ifdef NDEBUG
# define cbor_assert(cond) do { if (!(cond)) unreachable(); } while (0)
#else
# define cbor_assert(cond) assert(cond)
#endif
#ifndef STRINGIFY
#define STRINGIFY(x) STRINGIFY2(x)
#endif
#define STRINGIFY2(x) #x
#if !defined(UINT32_MAX) || !defined(INT64_MAX)
/* C89? We can define UINT32_MAX portably, but not INT64_MAX */
# error "Your system has stdint.h but that doesn't define UINT32_MAX or INT64_MAX"
#endif
#ifndef DBL_DECIMAL_DIG
/* DBL_DECIMAL_DIG is C11 */
# define DBL_DECIMAL_DIG 17
#endif
#define DBL_DECIMAL_DIG_STR STRINGIFY(DBL_DECIMAL_DIG)
#if defined(__GNUC__) && defined(__i386__) && !defined(__iamcu__)
# define CBOR_INTERNAL_API_CC __attribute__((regparm(3)))
#elif defined(_MSC_VER) && defined(_M_IX86)
# define CBOR_INTERNAL_API_CC __fastcall
#else
# define CBOR_INTERNAL_API_CC
#endif
#ifndef __has_builtin
# define __has_builtin(x) 0
#endif
#if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)) || \
(__has_builtin(__builtin_bswap64) && __has_builtin(__builtin_bswap32))
# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
# define cbor_ntohll __builtin_bswap64
# define cbor_htonll __builtin_bswap64
# define cbor_ntohl __builtin_bswap32
# define cbor_htonl __builtin_bswap32
# ifdef __INTEL_COMPILER
# define cbor_ntohs _bswap16
# define cbor_htons _bswap16
# elif (__GNUC__ * 100 + __GNUC_MINOR__ >= 608) || __has_builtin(__builtin_bswap16)
# define cbor_ntohs __builtin_bswap16
# define cbor_htons __builtin_bswap16
# else
# define cbor_ntohs(x) (((uint16_t)x >> 8) | ((uint16_t)x << 8))
# define cbor_htons cbor_ntohs
# endif
# else
# define cbor_ntohll
# define cbor_htonll
# define cbor_ntohl
# define cbor_htonl
# define cbor_ntohs
# define cbor_htons
# endif
#elif defined(__sun)
# include <sys/byteorder.h>
#elif defined(_MSC_VER)
/* MSVC, which implies Windows, which implies little-endian and sizeof(long) == 4 */
# include <stdlib.h>
# define cbor_ntohll _byteswap_uint64
# define cbor_htonll _byteswap_uint64
# define cbor_ntohl _byteswap_ulong
# define cbor_htonl _byteswap_ulong
# define cbor_ntohs _byteswap_ushort
# define cbor_htons _byteswap_ushort
#endif
#ifndef cbor_ntohs
# include <arpa/inet.h>
# define cbor_ntohs ntohs
# define cbor_htons htons
#endif
#ifndef cbor_ntohl
# include <arpa/inet.h>
# define cbor_ntohl ntohl
# define cbor_htonl htonl
#endif
#ifndef cbor_ntohll
# define cbor_ntohll ntohll
# define cbor_htonll htonll
/* ntohll isn't usually defined */
# ifndef ntohll
# if (defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) || \
(defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && __BYTE_ORDER == __BIG_ENDIAN) || \
(defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN) || \
(defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)) || (defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__)) || \
defined(__ARMEB__) || defined(__MIPSEB__) || defined(__s390__) || defined(__sparc__)
# define ntohll
# define htonll
# elif (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || \
(defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && __BYTE_ORDER == __LITTLE_ENDIAN) || \
(defined(BYTE_ORDER) && defined(LITTLE_ENDIAN) && BYTE_ORDER == LITTLE_ENDIAN) || \
defined(_LITTLE_ENDIAN) || defined(__LITTLE_ENDIAN__) || defined(__ARMEL__) || defined(__MIPSEL__) || \
defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__) || defined(__amd64)
# define ntohll(x) ((ntohl((uint32_t)(x)) * UINT64_C(0x100000000)) + (ntohl((x) >> 32)))
# define htonll ntohll
# else
# error "Unable to determine byte order!"
# endif
# endif
#endif
#ifdef __cplusplus
# define CONST_CAST(t, v) const_cast<t>(v)
#else
/* C-style const_cast without triggering a warning with -Wcast-qual */
# define CONST_CAST(t, v) (t)(uintptr_t)(v)
#endif
#ifdef __GNUC__
#ifndef likely
# define likely(x) __builtin_expect(!!(x), 1)
#endif
#ifndef unlikely
# define unlikely(x) __builtin_expect(!!(x), 0)
#endif
# define unreachable() __builtin_unreachable()
#elif defined(_MSC_VER)
# define likely(x) (x)
# define unlikely(x) (x)
# define unreachable() __assume(0)
#else
# define likely(x) (x)
# define unlikely(x) (x)
# define unreachable() do {} while (0)
#endif
static inline bool add_check_overflow(size_t v1, size_t v2, size_t *r)
{
#if ((defined(__GNUC__) && (__GNUC__ >= 5)) && !defined(__INTEL_COMPILER)) || __has_builtin(__builtin_add_overflow)
return __builtin_add_overflow(v1, v2, r);
#else
/* unsigned additions are well-defined */
*r = v1 + v2;
return v1 > v1 + v2;
#endif
}
static inline unsigned short encode_half(double val)
{
#ifdef __F16C__
return _cvtss_sh((float)val, 3);
#else
uint64_t v;
memcpy(&v, &val, sizeof(v));
int sign = v >> 63 << 15;
int exp = (v >> 52) & 0x7ff;
int mant = v << 12 >> 12 >> (53-11); /* keep only the 11 most significant bits of the mantissa */
exp -= 1023;
if (exp == 1024) {
/* infinity or NaN */
exp = 16;
mant >>= 1;
} else if (exp >= 16) {
/* overflow, as largest number */
exp = 15;
mant = 1023;
} else if (exp >= -14) {
/* regular normal */
} else if (exp >= -24) {
/* subnormal */
mant |= 1024;
mant >>= -(exp + 14);
exp = -15;
} else {
/* underflow, make zero */
return 0;
}
/* safe cast here as bit operations above guarantee not to overflow */
return (unsigned short)(sign | ((exp + 15) << 10) | mant);
#endif
}
/* this function was copied & adapted from RFC 7049 Appendix D */
static inline double decode_half(unsigned short half)
{
#ifdef __F16C__
return _cvtsh_ss(half);
#else
int exp = (half >> 10) & 0x1f;
int mant = half & 0x3ff;
double val;
if (exp == 0) val = ldexp(mant, -24);
else if (exp != 31) val = ldexp(mant + 1024, exp - 25);
else val = mant == 0 ? INFINITY : NAN;
return half & 0x8000 ? -val : val;
#endif
}
#endif /* COMPILERSUPPORT_H */
|
