1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
7 // met:
8 //
9 // * Redistributions of source code must retain the above copyright
10 // notice, this list of conditions and the following disclaimer.
11 // * Redistributions in binary form must reproduce the above
12 // copyright notice, this list of conditions and the following disclaimer
13 // in the documentation and/or other materials provided with the
14 // distribution.
15 // * Neither the name of Google Inc. nor the names of its
16 // contributors may be used to endorse or promote products derived from
17 // this software without specific prior written permission.
18 //
19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30
31 #ifndef GOOGLE_PROTOBUF_STUBS_PORT_H_
32 #define GOOGLE_PROTOBUF_STUBS_PORT_H_
33
34 #include <assert.h>
35 #include <stdlib.h>
36 #include <cstddef>
37 #include <string>
38 #include <string.h>
39 #if defined(__osf__)
40 // Tru64 lacks stdint.h, but has inttypes.h which defines a superset of
41 // what stdint.h would define.
42 #include <inttypes.h>
43 #elif !defined(_MSC_VER)
44 #include <stdint.h>
45 #endif
46
47 #undef PROTOBUF_LITTLE_ENDIAN
48 #ifdef _WIN32
49 // Assuming windows is always little-endian.
50 // TODO(xiaofeng): The PROTOBUF_LITTLE_ENDIAN is not only used for
51 // optimization but also for correctness. We should define an
52 // different macro to test the big-endian code path in coded_stream.
53 #if !defined(PROTOBUF_DISABLE_LITTLE_ENDIAN_OPT_FOR_TEST)
54 #define PROTOBUF_LITTLE_ENDIAN 1
55 #endif
56 #if _MSC_VER >= 1300 && !defined(__INTEL_COMPILER)
57 // If MSVC has "/RTCc" set, it will complain about truncating casts at
58 // runtime. This file contains some intentional truncating casts.
59 #pragma runtime_checks("c", off)
60 #endif
61 #else
62 #include <sys/param.h> // __BYTE_ORDER
63 #if ((defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__)) || \
64 (defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN)) && \
65 !defined(PROTOBUF_DISABLE_LITTLE_ENDIAN_OPT_FOR_TEST)
66 #define PROTOBUF_LITTLE_ENDIAN 1
67 #endif
68 #endif
69 #if defined(_MSC_VER) && defined(PROTOBUF_USE_DLLS)
70 #ifdef LIBPROTOBUF_EXPORTS
71 #define LIBPROTOBUF_EXPORT __declspec(dllexport)
72 #else
73 #define LIBPROTOBUF_EXPORT __declspec(dllimport)
74 #endif
75 #ifdef LIBPROTOC_EXPORTS
76 #define LIBPROTOC_EXPORT __declspec(dllexport)
77 #else
78 #define LIBPROTOC_EXPORT __declspec(dllimport)
79 #endif
80 #else
81 #define LIBPROTOBUF_EXPORT
82 #define LIBPROTOC_EXPORT
83 #endif
84
85 // These #includes are for the byte swap functions declared later on.
86 #ifdef _MSC_VER
87 #include <stdlib.h> // NOLINT(build/include)
88 #elif defined(__APPLE__)
89 #include <libkern/OSByteOrder.h>
90 #elif defined(__GLIBC__) || defined(__CYGWIN__)
91 #include <byteswap.h> // IWYU pragma: export
92 #endif
93
94 // ===================================================================
95 // from google3/base/port.h
96 namespace google {
97 namespace protobuf {
98
99 typedef unsigned int uint;
100
101 #ifdef _MSC_VER
102 typedef signed __int8 int8;
103 typedef __int16 int16;
104 typedef __int32 int32;
105 typedef __int64 int64;
106
107 typedef unsigned __int8 uint8;
108 typedef unsigned __int16 uint16;
109 typedef unsigned __int32 uint32;
110 typedef unsigned __int64 uint64;
111 #else
112 typedef signed char int8;
113 typedef short int16;
114 typedef int int32;
115 typedef long long int64;
116
117 typedef unsigned char uint8;
118 typedef unsigned short uint16;
119 typedef unsigned int uint32;
120 typedef unsigned long long uint64;
121 #endif
122
123 // long long macros to be used because gcc and vc++ use different suffixes,
124 // and different size specifiers in format strings
125 #undef GOOGLE_LONGLONG
126 #undef GOOGLE_ULONGLONG
127 #undef GOOGLE_LL_FORMAT
128
129 #ifdef _MSC_VER
130 #define GOOGLE_LONGLONG(x) x##I64
131 #define GOOGLE_ULONGLONG(x) x##UI64
132 #define GOOGLE_LL_FORMAT "I64" // As in printf("%I64d", ...)
133 #else
134 #define GOOGLE_LONGLONG(x) x##LL
135 #define GOOGLE_ULONGLONG(x) x##ULL
136 #define GOOGLE_LL_FORMAT "ll" // As in "%lld". Note that "q" is poor form also.
137 #endif
138
139 static const int32 kint32max = 0x7FFFFFFF;
140 static const int32 kint32min = -kint32max - 1;
141 static const int64 kint64max = GOOGLE_LONGLONG(0x7FFFFFFFFFFFFFFF);
142 static const int64 kint64min = -kint64max - 1;
143 static const uint32 kuint32max = 0xFFFFFFFFu;
144 static const uint64 kuint64max = GOOGLE_ULONGLONG(0xFFFFFFFFFFFFFFFF);
145
146 // -------------------------------------------------------------------
147 // Annotations: Some parts of the code have been annotated in ways that might
148 // be useful to some compilers or tools, but are not supported universally.
149 // You can #define these annotations yourself if the default implementation
150 // is not right for you.
151
152 #ifndef GOOGLE_ATTRIBUTE_ALWAYS_INLINE
153 #if defined(__GNUC__) && (__GNUC__ > 3 ||(__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
154 // For functions we want to force inline.
155 // Introduced in gcc 3.1.
156 #define GOOGLE_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline))
157 #else
158 // Other compilers will have to figure it out for themselves.
159 #define GOOGLE_ATTRIBUTE_ALWAYS_INLINE
160 #endif
161 #endif
162
163 #ifndef GOOGLE_ATTRIBUTE_NOINLINE
164 #if defined(__GNUC__) && (__GNUC__ > 3 ||(__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
165 // For functions we want to force not inline.
166 // Introduced in gcc 3.1.
167 #define GOOGLE_ATTRIBUTE_NOINLINE __attribute__ ((noinline))
168 #elif defined(_MSC_VER) && (_MSC_VER >= 1400)
169 // Seems to have been around since at least Visual Studio 2005
170 #define GOOGLE_ATTRIBUTE_NOINLINE __declspec(noinline)
171 #else
172 // Other compilers will have to figure it out for themselves.
173 #define GOOGLE_ATTRIBUTE_NOINLINE
174 #endif
175 #endif
176
177 #ifndef GOOGLE_ATTRIBUTE_DEPRECATED
178 #ifdef __GNUC__
179 // If the method/variable/type is used anywhere, produce a warning.
180 #define GOOGLE_ATTRIBUTE_DEPRECATED __attribute__((deprecated))
181 #else
182 #define GOOGLE_ATTRIBUTE_DEPRECATED
183 #endif
184 #endif
185
186 #ifndef GOOGLE_PREDICT_TRUE
187 #ifdef __GNUC__
188 // Provided at least since GCC 3.0.
189 #define GOOGLE_PREDICT_TRUE(x) (__builtin_expect(!!(x), 1))
190 #else
191 #define GOOGLE_PREDICT_TRUE(x) (x)
192 #endif
193 #endif
194
195 #ifndef GOOGLE_PREDICT_FALSE
196 #ifdef __GNUC__
197 // Provided at least since GCC 3.0.
198 #define GOOGLE_PREDICT_FALSE(x) (__builtin_expect(x, 0))
199 #else
200 #define GOOGLE_PREDICT_FALSE(x) (x)
201 #endif
202 #endif
203
204 // Delimits a block of code which may write to memory which is simultaneously
205 // written by other threads, but which has been determined to be thread-safe
206 // (e.g. because it is an idempotent write).
207 #ifndef GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN
208 #define GOOGLE_SAFE_CONCURRENT_WRITES_BEGIN()
209 #endif
210 #ifndef GOOGLE_SAFE_CONCURRENT_WRITES_END
211 #define GOOGLE_SAFE_CONCURRENT_WRITES_END()
212 #endif
213
214 #if defined(__clang__) && defined(__has_cpp_attribute) \
215 && !defined(GOOGLE_PROTOBUF_OS_APPLE)
216 # if defined(GOOGLE_PROTOBUF_OS_NACL) || defined(EMSCRIPTEN) || \
217 __has_cpp_attribute(clang::fallthrough)
218 # define GOOGLE_FALLTHROUGH_INTENDED [[clang::fallthrough]]
219 # endif
220 #endif
221
222 #ifndef GOOGLE_FALLTHROUGH_INTENDED
223 # define GOOGLE_FALLTHROUGH_INTENDED
224 #endif
225
226 #define GOOGLE_GUARDED_BY(x)
227 #define GOOGLE_ATTRIBUTE_COLD
228
229 // x86 and x86-64 can perform unaligned loads/stores directly.
230 #if defined(_M_X64) || defined(__x86_64__) || \
231 defined(_M_IX86) || defined(__i386__)
232
233 #define GOOGLE_UNALIGNED_LOAD16(_p) (*reinterpret_cast<const uint16 *>(_p))
234 #define GOOGLE_UNALIGNED_LOAD32(_p) (*reinterpret_cast<const uint32 *>(_p))
235 #define GOOGLE_UNALIGNED_LOAD64(_p) (*reinterpret_cast<const uint64 *>(_p))
236
237 #define GOOGLE_UNALIGNED_STORE16(_p, _val) (*reinterpret_cast<uint16 *>(_p) = (_val))
238 #define GOOGLE_UNALIGNED_STORE32(_p, _val) (*reinterpret_cast<uint32 *>(_p) = (_val))
239 #define GOOGLE_UNALIGNED_STORE64(_p, _val) (*reinterpret_cast<uint64 *>(_p) = (_val))
240
241 #else
GOOGLE_UNALIGNED_LOAD16(const void * p)242 inline uint16 GOOGLE_UNALIGNED_LOAD16(const void *p) {
243 uint16 t;
244 memcpy(&t, p, sizeof t);
245 return t;
246 }
247
GOOGLE_UNALIGNED_LOAD32(const void * p)248 inline uint32 GOOGLE_UNALIGNED_LOAD32(const void *p) {
249 uint32 t;
250 memcpy(&t, p, sizeof t);
251 return t;
252 }
253
GOOGLE_UNALIGNED_LOAD64(const void * p)254 inline uint64 GOOGLE_UNALIGNED_LOAD64(const void *p) {
255 uint64 t;
256 memcpy(&t, p, sizeof t);
257 return t;
258 }
259
GOOGLE_UNALIGNED_STORE16(void * p,uint16 v)260 inline void GOOGLE_UNALIGNED_STORE16(void *p, uint16 v) {
261 memcpy(p, &v, sizeof v);
262 }
263
GOOGLE_UNALIGNED_STORE32(void * p,uint32 v)264 inline void GOOGLE_UNALIGNED_STORE32(void *p, uint32 v) {
265 memcpy(p, &v, sizeof v);
266 }
267
GOOGLE_UNALIGNED_STORE64(void * p,uint64 v)268 inline void GOOGLE_UNALIGNED_STORE64(void *p, uint64 v) {
269 memcpy(p, &v, sizeof v);
270 }
271 #endif
272
273 #if defined(_MSC_VER)
274 #define GOOGLE_THREAD_LOCAL __declspec(thread)
275 #else
276 #define GOOGLE_THREAD_LOCAL __thread
277 #endif
278
279 // The following guarantees declaration of the byte swap functions, and
280 // defines __BYTE_ORDER for MSVC
281 #ifdef _MSC_VER
282 #define __BYTE_ORDER __LITTLE_ENDIAN
283 #define bswap_16(x) _byteswap_ushort(x)
284 #define bswap_32(x) _byteswap_ulong(x)
285 #define bswap_64(x) _byteswap_uint64(x)
286
287 #elif defined(__APPLE__)
288 // Mac OS X / Darwin features
289 #define bswap_16(x) OSSwapInt16(x)
290 #define bswap_32(x) OSSwapInt32(x)
291 #define bswap_64(x) OSSwapInt64(x)
292
293 #elif !defined(__GLIBC__) && !defined(__CYGWIN__)
294
bswap_16(uint16 x)295 static inline uint16 bswap_16(uint16 x) {
296 return static_cast<uint16>(((x & 0xFF) << 8) | ((x & 0xFF00) >> 8));
297 }
298 #define bswap_16(x) bswap_16(x)
bswap_32(uint32 x)299 static inline uint32 bswap_32(uint32 x) {
300 return (((x & 0xFF) << 24) |
301 ((x & 0xFF00) << 8) |
302 ((x & 0xFF0000) >> 8) |
303 ((x & 0xFF000000) >> 24));
304 }
305 #define bswap_32(x) bswap_32(x)
bswap_64(uint64 x)306 static inline uint64 bswap_64(uint64 x) {
307 return (((x & GOOGLE_ULONGLONG(0xFF)) << 56) |
308 ((x & GOOGLE_ULONGLONG(0xFF00)) << 40) |
309 ((x & GOOGLE_ULONGLONG(0xFF0000)) << 24) |
310 ((x & GOOGLE_ULONGLONG(0xFF000000)) << 8) |
311 ((x & GOOGLE_ULONGLONG(0xFF00000000)) >> 8) |
312 ((x & GOOGLE_ULONGLONG(0xFF0000000000)) >> 24) |
313 ((x & GOOGLE_ULONGLONG(0xFF000000000000)) >> 40) |
314 ((x & GOOGLE_ULONGLONG(0xFF00000000000000)) >> 56));
315 }
316 #define bswap_64(x) bswap_64(x)
317
318 #endif
319
320 // ===================================================================
321 // from google3/util/endian/endian.h
322 LIBPROTOBUF_EXPORT uint32 ghtonl(uint32 x);
323
324 class BigEndian {
325 public:
326 #ifdef PROTOBUF_LITTLE_ENDIAN
327
FromHost16(uint16 x)328 static uint16 FromHost16(uint16 x) { return bswap_16(x); }
ToHost16(uint16 x)329 static uint16 ToHost16(uint16 x) { return bswap_16(x); }
330
FromHost32(uint32 x)331 static uint32 FromHost32(uint32 x) { return bswap_32(x); }
ToHost32(uint32 x)332 static uint32 ToHost32(uint32 x) { return bswap_32(x); }
333
FromHost64(uint64 x)334 static uint64 FromHost64(uint64 x) { return bswap_64(x); }
ToHost64(uint64 x)335 static uint64 ToHost64(uint64 x) { return bswap_64(x); }
336
IsLittleEndian()337 static bool IsLittleEndian() { return true; }
338
339 #else
340
341 static uint16 FromHost16(uint16 x) { return x; }
342 static uint16 ToHost16(uint16 x) { return x; }
343
344 static uint32 FromHost32(uint32 x) { return x; }
345 static uint32 ToHost32(uint32 x) { return x; }
346
347 static uint64 FromHost64(uint64 x) { return x; }
348 static uint64 ToHost64(uint64 x) { return x; }
349
350 static bool IsLittleEndian() { return false; }
351
352 #endif /* ENDIAN */
353
354 // Functions to do unaligned loads and stores in big-endian order.
Load16(const void * p)355 static uint16 Load16(const void *p) {
356 return ToHost16(GOOGLE_UNALIGNED_LOAD16(p));
357 }
358
Store16(void * p,uint16 v)359 static void Store16(void *p, uint16 v) {
360 GOOGLE_UNALIGNED_STORE16(p, FromHost16(v));
361 }
362
Load32(const void * p)363 static uint32 Load32(const void *p) {
364 return ToHost32(GOOGLE_UNALIGNED_LOAD32(p));
365 }
366
Store32(void * p,uint32 v)367 static void Store32(void *p, uint32 v) {
368 GOOGLE_UNALIGNED_STORE32(p, FromHost32(v));
369 }
370
Load64(const void * p)371 static uint64 Load64(const void *p) {
372 return ToHost64(GOOGLE_UNALIGNED_LOAD64(p));
373 }
374
Store64(void * p,uint64 v)375 static void Store64(void *p, uint64 v) {
376 GOOGLE_UNALIGNED_STORE64(p, FromHost64(v));
377 }
378 };
379
380
381 } // namespace protobuf
382 } // namespace google
383
384 #endif // GOOGLE_PROTOBUF_STUBS_PORT_H_
385