forked from zlib-ng/zlib-ng
-
Notifications
You must be signed in to change notification settings - Fork 1
/
zbuild.h
260 lines (233 loc) · 7.75 KB
/
zbuild.h
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
#ifndef _ZBUILD_H
#define _ZBUILD_H
#define _POSIX_SOURCE 1 /* fileno */
#ifndef _POSIX_C_SOURCE
# define _POSIX_C_SOURCE 200809L /* snprintf, posix_memalign, strdup */
#endif
#ifndef _ISOC11_SOURCE
# define _ISOC11_SOURCE 1 /* aligned_alloc */
#endif
#ifdef __OpenBSD__
# define _BSD_SOURCE 1
#endif
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
/* Determine compiler version of C Standard */
#ifdef __STDC_VERSION__
# if __STDC_VERSION__ >= 199901L
# ifndef STDC99
# define STDC99
# endif
# endif
# if __STDC_VERSION__ >= 201112L
# ifndef STDC11
# define STDC11
# endif
# endif
#endif
#ifndef Z_HAS_ATTRIBUTE
# if defined(__has_attribute)
# define Z_HAS_ATTRIBUTE(a) __has_attribute(a)
# else
# define Z_HAS_ATTRIBUTE(a) 0
# endif
#endif
#ifndef Z_FALLTHROUGH
# if Z_HAS_ATTRIBUTE(__fallthrough__) || (defined(__GNUC__) && (__GNUC__ >= 7))
# define Z_FALLTHROUGH __attribute__((__fallthrough__))
# else
# define Z_FALLTHROUGH do {} while(0) /* fallthrough */
# endif
#endif
#ifndef Z_TARGET
# if Z_HAS_ATTRIBUTE(__target__)
# define Z_TARGET(x) __attribute__((__target__(x)))
# else
# define Z_TARGET(x)
# endif
#endif
/* This has to be first include that defines any types */
#if defined(_MSC_VER)
# if defined(_WIN64)
typedef __int64 ssize_t;
# else
typedef long ssize_t;
# endif
# if defined(_WIN64)
#define SSIZE_MAX _I64_MAX
# else
#define SSIZE_MAX LONG_MAX
# endif
#endif
/* MS Visual Studio does not allow inline in C, only C++.
But it provides __inline instead, so use that. */
#if defined(_MSC_VER) && !defined(inline) && !defined(__cplusplus)
# define inline __inline
#endif
#if defined(ZLIB_COMPAT)
# define PREFIX(x) x
# define PREFIX2(x) ZLIB_ ## x
# define PREFIX3(x) z_ ## x
# define PREFIX4(x) x ## 64
# define zVersion zlibVersion
#else
# define PREFIX(x) zng_ ## x
# define PREFIX2(x) ZLIBNG_ ## x
# define PREFIX3(x) zng_ ## x
# define PREFIX4(x) zng_ ## x
# define zVersion zlibng_version
# define z_size_t size_t
#endif
/* In zlib-compat some functions and types use unsigned long, but zlib-ng use size_t */
#if defined(ZLIB_COMPAT)
# define z_uintmax_t unsigned long
#else
# define z_uintmax_t size_t
#endif
/* Minimum of a and b. */
#define MIN(a, b) ((a) > (b) ? (b) : (a))
/* Maximum of a and b. */
#define MAX(a, b) ((a) < (b) ? (b) : (a))
/* Ignore unused variable warning */
#define Z_UNUSED(var) (void)(var)
#if defined(HAVE_VISIBILITY_INTERNAL)
# define Z_INTERNAL __attribute__((visibility ("internal")))
#elif defined(HAVE_VISIBILITY_HIDDEN)
# define Z_INTERNAL __attribute__((visibility ("hidden")))
#else
# define Z_INTERNAL
#endif
/* Symbol versioning helpers, allowing multiple versions of a function to exist.
* Functions using this must also be added to zlib-ng.map for each version.
* Double @@ means this is the default for newly compiled applications to link against.
* Single @ means this is kept for backwards compatibility.
* This is only used for Zlib-ng native API, and only on platforms supporting this.
*/
#if defined(HAVE_SYMVER)
# define ZSYMVER(func,alias,ver) __asm__(".symver " func ", " alias "@ZLIB_NG_" ver);
# define ZSYMVER_DEF(func,alias,ver) __asm__(".symver " func ", " alias "@@ZLIB_NG_" ver);
#else
# define ZSYMVER(func,alias,ver)
# define ZSYMVER_DEF(func,alias,ver)
#endif
#ifndef __cplusplus
# define Z_REGISTER register
#else
# define Z_REGISTER
#endif
/* Reverse the bytes in a value. Use compiler intrinsics when
possible to take advantage of hardware implementations. */
#if defined(_MSC_VER) && (_MSC_VER >= 1300)
# include <stdlib.h>
# pragma intrinsic(_byteswap_ulong)
# define ZSWAP16(q) _byteswap_ushort(q)
# define ZSWAP32(q) _byteswap_ulong(q)
# define ZSWAP64(q) _byteswap_uint64(q)
#elif defined(__clang__) || (defined(__GNUC__) && \
(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)))
# define ZSWAP16(q) __builtin_bswap16(q)
# define ZSWAP32(q) __builtin_bswap32(q)
# define ZSWAP64(q) __builtin_bswap64(q)
#elif defined(__GNUC__) && (__GNUC__ >= 2) && defined(__linux__)
# include <byteswap.h>
# define ZSWAP16(q) bswap_16(q)
# define ZSWAP32(q) bswap_32(q)
# define ZSWAP64(q) bswap_64(q)
#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
# include <sys/endian.h>
# define ZSWAP16(q) bswap16(q)
# define ZSWAP32(q) bswap32(q)
# define ZSWAP64(q) bswap64(q)
#elif defined(__OpenBSD__)
# include <sys/endian.h>
# define ZSWAP16(q) swap16(q)
# define ZSWAP32(q) swap32(q)
# define ZSWAP64(q) swap64(q)
#elif defined(__INTEL_COMPILER)
/* ICC does not provide a two byte swap. */
# define ZSWAP16(q) ((((q) & 0xff) << 8) | (((q) & 0xff00) >> 8))
# define ZSWAP32(q) _bswap(q)
# define ZSWAP64(q) _bswap64(q)
#else
# define ZSWAP16(q) ((((q) & 0xff) << 8) | (((q) & 0xff00) >> 8))
# define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
(((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
# define ZSWAP64(q) \
(((q & 0xFF00000000000000u) >> 56u) | \
((q & 0x00FF000000000000u) >> 40u) | \
((q & 0x0000FF0000000000u) >> 24u) | \
((q & 0x000000FF00000000u) >> 8u) | \
((q & 0x00000000FF000000u) << 8u) | \
((q & 0x0000000000FF0000u) << 24u) | \
((q & 0x000000000000FF00u) << 40u) | \
((q & 0x00000000000000FFu) << 56u))
#endif
/* Only enable likely/unlikely if the compiler is known to support it */
#if (defined(__GNUC__) && (__GNUC__ >= 3)) || defined(__INTEL_COMPILER) || defined(__clang__)
# define LIKELY_NULL(x) __builtin_expect((x) != 0, 0)
# define LIKELY(x) __builtin_expect(!!(x), 1)
# define UNLIKELY(x) __builtin_expect(!!(x), 0)
#else
# define LIKELY_NULL(x) x
# define LIKELY(x) x
# define UNLIKELY(x) x
#endif /* (un)likely */
#if defined(HAVE_ATTRIBUTE_ALIGNED)
# define ALIGNED_(x) __attribute__ ((aligned(x)))
#elif defined(_MSC_VER)
# define ALIGNED_(x) __declspec(align(x))
#endif
/* Diagnostic functions */
#ifdef ZLIB_DEBUG
# include <stdio.h>
extern int Z_INTERNAL z_verbose;
extern void Z_INTERNAL z_error(const char *m);
# define Assert(cond, msg) {if (!(cond)) z_error(msg);}
# define Trace(x) {if (z_verbose >= 0) fprintf x;}
# define Tracev(x) {if (z_verbose > 0) fprintf x;}
# define Tracevv(x) {if (z_verbose > 1) fprintf x;}
# define Tracec(c, x) {if (z_verbose > 0 && (c)) fprintf x;}
# define Tracecv(c, x) {if (z_verbose > 1 && (c)) fprintf x;}
#else
# define Assert(cond, msg)
# define Trace(x)
# define Tracev(x)
# define Tracevv(x)
# define Tracec(c, x)
# define Tracecv(c, x)
#endif
#ifndef NO_UNALIGNED
# if defined(__x86_64__) || defined(_M_X64) || defined(__amd64__) || defined(_M_AMD64)
# define UNALIGNED_OK
# define UNALIGNED64_OK
# elif defined(__i386__) || defined(__i486__) || defined(__i586__) || \
defined(__i686__) || defined(_X86_) || defined(_M_IX86)
# define UNALIGNED_OK
# elif defined(__aarch64__) || defined(_M_ARM64) || defined(_M_ARM64EC)
# if (defined(__GNUC__) && defined(__ARM_FEATURE_UNALIGNED)) || !defined(__GNUC__)
# define UNALIGNED_OK
# define UNALIGNED64_OK
# endif
# elif defined(__arm__) || (_M_ARM >= 7)
# if (defined(__GNUC__) && defined(__ARM_FEATURE_UNALIGNED)) || !defined(__GNUC__)
# define UNALIGNED_OK
# endif
# elif defined(__powerpc64__) || defined(__ppc64__)
# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
# define UNALIGNED_OK
# define UNALIGNED64_OK
# endif
# endif
#endif
#if defined(__has_feature)
# if __has_feature(memory_sanitizer)
# define Z_MEMORY_SANITIZER 1
# include <sanitizer/msan_interface.h>
# endif
#endif
#ifndef Z_MEMORY_SANITIZER
# define __msan_unpoison(a, size) do { Z_UNUSED(a); Z_UNUSED(size); } while (0)
#endif
#endif