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// Author: kenton@google.com (Kenton Varda)
32
33#include <google/protobuf/stubs/common.h>
34
35#include <atomic>
36#include <errno.h>
37#include <sstream>
38#include <stdio.h>
39#include <vector>
40
41#ifdef _WIN32
42#ifndef WIN32_LEAN_AND_MEAN
43#define WIN32_LEAN_AND_MEAN // We only need minimal includes
44#endif
45#include <windows.h>
46#define snprintf _snprintf // see comment in strutil.cc
47#endif
48#if defined(__ANDROID__)
49#include <android/log.h>
50#endif
51
52#include <google/protobuf/stubs/callback.h>
53#include <google/protobuf/stubs/logging.h>
54#include <google/protobuf/stubs/once.h>
55#include <google/protobuf/stubs/status.h>
56#include <google/protobuf/stubs/stringpiece.h>
57#include <google/protobuf/stubs/strutil.h>
58#include <google/protobuf/stubs/int128.h>
59
60#include <google/protobuf/port_def.inc>
61
62namespace google {
63namespace protobuf {
64
65namespace internal {
66
67void VerifyVersion(int headerVersion,
68 int minLibraryVersion,
69 const char* filename) {
70 if (GOOGLE_PROTOBUF_VERSION < minLibraryVersion) {
71 // Library is too old for headers.
72 GOOGLE_LOG(FATAL)
73 << "This program requires version " << VersionString(version: minLibraryVersion)
74 << " of the Protocol Buffer runtime library, but the installed version "
75 "is " << VersionString(GOOGLE_PROTOBUF_VERSION) << ". Please update "
76 "your library. If you compiled the program yourself, make sure that "
77 "your headers are from the same version of Protocol Buffers as your "
78 "link-time library. (Version verification failed in \""
79 << filename << "\".)";
80 }
81 if (headerVersion < kMinHeaderVersionForLibrary) {
82 // Headers are too old for library.
83 GOOGLE_LOG(FATAL)
84 << "This program was compiled against version "
85 << VersionString(version: headerVersion) << " of the Protocol Buffer runtime "
86 "library, which is not compatible with the installed version ("
87 << VersionString(GOOGLE_PROTOBUF_VERSION) << "). Contact the program "
88 "author for an update. If you compiled the program yourself, make "
89 "sure that your headers are from the same version of Protocol Buffers "
90 "as your link-time library. (Version verification failed in \""
91 << filename << "\".)";
92 }
93}
94
95std::string VersionString(int version) {
96 int major = version / 1000000;
97 int minor = (version / 1000) % 1000;
98 int micro = version % 1000;
99
100 // 128 bytes should always be enough, but we use snprintf() anyway to be
101 // safe.
102 char buffer[128];
103 snprintf(s: buffer, maxlen: sizeof(buffer), format: "%d.%d.%d", major, minor, micro);
104
105 // Guard against broken MSVC snprintf().
106 buffer[sizeof(buffer)-1] = '\0';
107
108 return buffer;
109}
110
111} // namespace internal
112
113// ===================================================================
114// emulates google3/base/logging.cc
115
116// If the minimum logging level is not set, we default to logging messages for
117// all levels.
118#ifndef GOOGLE_PROTOBUF_MIN_LOG_LEVEL
119#define GOOGLE_PROTOBUF_MIN_LOG_LEVEL LOGLEVEL_INFO
120#endif
121
122namespace internal {
123
124#if defined(__ANDROID__)
125inline void DefaultLogHandler(LogLevel level, const char* filename, int line,
126 const std::string& message) {
127 if (level < GOOGLE_PROTOBUF_MIN_LOG_LEVEL) {
128 return;
129 }
130 static const char* level_names[] = {"INFO", "WARNING", "ERROR", "FATAL"};
131
132 static const int android_log_levels[] = {
133 ANDROID_LOG_INFO, // LOG(INFO),
134 ANDROID_LOG_WARN, // LOG(WARNING)
135 ANDROID_LOG_ERROR, // LOG(ERROR)
136 ANDROID_LOG_FATAL, // LOG(FATAL)
137 };
138
139 // Bound the logging level.
140 const int android_log_level = android_log_levels[level];
141 ::std::ostringstream ostr;
142 ostr << "[libprotobuf " << level_names[level] << " " << filename << ":"
143 << line << "] " << message.c_str();
144
145 // Output the log string the Android log at the appropriate level.
146 __android_log_write(android_log_level, "libprotobuf-native",
147 ostr.str().c_str());
148 // Also output to std::cerr.
149 fprintf(stderr, "%s", ostr.str().c_str());
150 fflush(stderr);
151
152 // Indicate termination if needed.
153 if (android_log_level == ANDROID_LOG_FATAL) {
154 __android_log_write(ANDROID_LOG_FATAL, "libprotobuf-native",
155 "terminating.\n");
156 }
157}
158
159#else
160void DefaultLogHandler(LogLevel level, const char* filename, int line,
161 const std::string& message) {
162 if (level < GOOGLE_PROTOBUF_MIN_LOG_LEVEL) {
163 return;
164 }
165 static const char* level_names[] = { "INFO", "WARNING", "ERROR", "FATAL" };
166
167 // We use fprintf() instead of cerr because we want this to work at static
168 // initialization time.
169 fprintf(stderr, format: "[libprotobuf %s %s:%d] %s\n",
170 level_names[level], filename, line, message.c_str());
171 fflush(stderr); // Needed on MSVC.
172}
173#endif
174
175void NullLogHandler(LogLevel /* level */, const char* /* filename */,
176 int /* line */, const std::string& /* message */) {
177 // Nothing.
178}
179
180static LogHandler* log_handler_ = &DefaultLogHandler;
181static std::atomic<int> log_silencer_count_ = ATOMIC_VAR_INIT(0);
182
183LogMessage& LogMessage::operator<<(const std::string& value) {
184 message_ += value;
185 return *this;
186}
187
188LogMessage& LogMessage::operator<<(const char* value) {
189 message_ += value;
190 return *this;
191}
192
193LogMessage& LogMessage::operator<<(const StringPiece& value) {
194 message_ += value.ToString();
195 return *this;
196}
197
198LogMessage& LogMessage::operator<<(const util::Status& status) {
199 message_ += status.ToString();
200 return *this;
201}
202
203LogMessage& LogMessage::operator<<(const uint128& value) {
204 std::ostringstream str;
205 str << value;
206 message_ += str.str();
207 return *this;
208}
209
210LogMessage& LogMessage::operator<<(char value) {
211 return *this << StringPiece(&value, 1);
212}
213
214LogMessage& LogMessage::operator<<(void* value) {
215 StrAppend(dest: &message_, a: strings::Hex(reinterpret_cast<uintptr_t>(value)));
216 return *this;
217}
218
219#undef DECLARE_STREAM_OPERATOR
220#define DECLARE_STREAM_OPERATOR(TYPE) \
221 LogMessage& LogMessage::operator<<(TYPE value) { \
222 StrAppend(&message_, value); \
223 return *this; \
224 }
225
226DECLARE_STREAM_OPERATOR(int)
227DECLARE_STREAM_OPERATOR(unsigned int)
228DECLARE_STREAM_OPERATOR(long) // NOLINT(runtime/int)
229DECLARE_STREAM_OPERATOR(unsigned long) // NOLINT(runtime/int)
230DECLARE_STREAM_OPERATOR(double)
231DECLARE_STREAM_OPERATOR(long long) // NOLINT(runtime/int)
232DECLARE_STREAM_OPERATOR(unsigned long long) // NOLINT(runtime/int)
233#undef DECLARE_STREAM_OPERATOR
234
235LogMessage::LogMessage(LogLevel level, const char* filename, int line)
236 : level_(level), filename_(filename), line_(line) {}
237LogMessage::~LogMessage() {}
238
239void LogMessage::Finish() {
240 bool suppress = false;
241
242 if (level_ != LOGLEVEL_FATAL) {
243 suppress = log_silencer_count_ > 0;
244 }
245
246 if (!suppress) {
247 log_handler_(level_, filename_, line_, message_);
248 }
249
250 if (level_ == LOGLEVEL_FATAL) {
251#if PROTOBUF_USE_EXCEPTIONS
252 throw FatalException(filename_, line_, message_);
253#else
254 abort();
255#endif
256 }
257}
258
259void LogFinisher::operator=(LogMessage& other) {
260 other.Finish();
261}
262
263} // namespace internal
264
265LogHandler* SetLogHandler(LogHandler* new_func) {
266 LogHandler* old = internal::log_handler_;
267 if (old == &internal::NullLogHandler) {
268 old = nullptr;
269 }
270 if (new_func == nullptr) {
271 internal::log_handler_ = &internal::NullLogHandler;
272 } else {
273 internal::log_handler_ = new_func;
274 }
275 return old;
276}
277
278LogSilencer::LogSilencer() {
279 ++internal::log_silencer_count_;
280};
281
282LogSilencer::~LogSilencer() {
283 --internal::log_silencer_count_;
284};
285
286// ===================================================================
287// emulates google3/base/callback.cc
288
289Closure::~Closure() {}
290
291namespace internal { FunctionClosure0::~FunctionClosure0() {} }
292
293void DoNothing() {}
294
295// ===================================================================
296// emulates google3/util/endian/endian.h
297//
298// TODO(xiaofeng): PROTOBUF_LITTLE_ENDIAN is unfortunately defined in
299// google/protobuf/io/coded_stream.h and therefore can not be used here.
300// Maybe move that macro definition here in the future.
301uint32_t ghtonl(uint32_t x) {
302 union {
303 uint32_t result;
304 uint8_t result_array[4];
305 };
306 result_array[0] = static_cast<uint8_t>(x >> 24);
307 result_array[1] = static_cast<uint8_t>((x >> 16) & 0xFF);
308 result_array[2] = static_cast<uint8_t>((x >> 8) & 0xFF);
309 result_array[3] = static_cast<uint8_t>(x & 0xFF);
310 return result;
311}
312
313#if PROTOBUF_USE_EXCEPTIONS
314FatalException::~FatalException() throw() {}
315
316const char* FatalException::what() const throw() {
317 return message_.c_str();
318}
319#endif
320
321} // namespace protobuf
322} // namespace google
323
324#include <google/protobuf/port_undef.inc>
325