Ian Hodson | 2ee91b4 | 2012-05-14 12:29:36 +0100 | [diff] [blame] | 1 | // Copyright 2009 The RE2 Authors. All Rights Reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // Simplified version of Google's logging. |
| 6 | |
| 7 | #ifndef RE2_UTIL_LOGGING_H__ |
| 8 | #define RE2_UTIL_LOGGING_H__ |
| 9 | |
| 10 | #include <unistd.h> /* for write */ |
| 11 | #include <sstream> |
| 12 | |
| 13 | // Debug-only checking. |
| 14 | #define DCHECK(condition) assert(condition) |
| 15 | #define DCHECK_EQ(val1, val2) assert((val1) == (val2)) |
| 16 | #define DCHECK_NE(val1, val2) assert((val1) != (val2)) |
| 17 | #define DCHECK_LE(val1, val2) assert((val1) <= (val2)) |
| 18 | #define DCHECK_LT(val1, val2) assert((val1) < (val2)) |
| 19 | #define DCHECK_GE(val1, val2) assert((val1) >= (val2)) |
| 20 | #define DCHECK_GT(val1, val2) assert((val1) > (val2)) |
| 21 | |
| 22 | // Always-on checking |
| 23 | #define CHECK(x) if(x){}else LogMessageFatal(__FILE__, __LINE__).stream() << "Check failed: " #x |
| 24 | #define CHECK_LT(x, y) CHECK((x) < (y)) |
| 25 | #define CHECK_GT(x, y) CHECK((x) > (y)) |
| 26 | #define CHECK_LE(x, y) CHECK((x) <= (y)) |
| 27 | #define CHECK_GE(x, y) CHECK((x) >= (y)) |
| 28 | #define CHECK_EQ(x, y) CHECK((x) == (y)) |
| 29 | #define CHECK_NE(x, y) CHECK((x) != (y)) |
| 30 | |
| 31 | #define LOG_INFO LogMessage(__FILE__, __LINE__) |
| 32 | #define LOG_ERROR LOG_INFO |
| 33 | #define LOG_WARNING LOG_INFO |
| 34 | #define LOG_FATAL LogMessageFatal(__FILE__, __LINE__) |
| 35 | #define LOG_QFATAL LOG_FATAL |
| 36 | |
| 37 | #define VLOG(x) if((x)>0){}else LOG_INFO.stream() |
| 38 | |
| 39 | #ifdef NDEBUG |
| 40 | #define DEBUG_MODE 0 |
| 41 | #define LOG_DFATAL LOG_ERROR |
| 42 | #else |
| 43 | #define DEBUG_MODE 1 |
| 44 | #define LOG_DFATAL LOG_FATAL |
| 45 | #endif |
| 46 | |
| 47 | #define LOG(severity) LOG_ ## severity.stream() |
| 48 | |
| 49 | class LogMessage { |
| 50 | public: |
Alexander Gutkin | 0d4c523 | 2013-02-28 13:47:27 +0000 | [diff] [blame] | 51 | LogMessage(const char* file, int line) : flushed_(false) { |
Ian Hodson | 2ee91b4 | 2012-05-14 12:29:36 +0100 | [diff] [blame] | 52 | stream() << file << ":" << line << ": "; |
| 53 | } |
Alexander Gutkin | 0d4c523 | 2013-02-28 13:47:27 +0000 | [diff] [blame] | 54 | void Flush() { |
Ian Hodson | 2ee91b4 | 2012-05-14 12:29:36 +0100 | [diff] [blame] | 55 | stream() << "\n"; |
| 56 | string s = str_.str(); |
Alexander Gutkin | 0d4c523 | 2013-02-28 13:47:27 +0000 | [diff] [blame] | 57 | int n = (int)s.size(); // shut up msvc |
| 58 | if(write(2, s.data(), n) < 0) {} // shut up gcc |
| 59 | flushed_ = true; |
| 60 | } |
| 61 | ~LogMessage() { |
| 62 | if (!flushed_) { |
| 63 | Flush(); |
| 64 | } |
Ian Hodson | 2ee91b4 | 2012-05-14 12:29:36 +0100 | [diff] [blame] | 65 | } |
| 66 | ostream& stream() { return str_; } |
| 67 | |
| 68 | private: |
Alexander Gutkin | 0d4c523 | 2013-02-28 13:47:27 +0000 | [diff] [blame] | 69 | bool flushed_; |
Ian Hodson | 2ee91b4 | 2012-05-14 12:29:36 +0100 | [diff] [blame] | 70 | std::ostringstream str_; |
| 71 | DISALLOW_EVIL_CONSTRUCTORS(LogMessage); |
| 72 | }; |
| 73 | |
| 74 | class LogMessageFatal : public LogMessage { |
| 75 | public: |
| 76 | LogMessageFatal(const char* file, int line) |
| 77 | : LogMessage(file, line) { } |
| 78 | ~LogMessageFatal() { |
Alexander Gutkin | 0d4c523 | 2013-02-28 13:47:27 +0000 | [diff] [blame] | 79 | Flush(); |
Ian Hodson | 2ee91b4 | 2012-05-14 12:29:36 +0100 | [diff] [blame] | 80 | abort(); |
| 81 | } |
| 82 | private: |
| 83 | DISALLOW_EVIL_CONSTRUCTORS(LogMessageFatal); |
| 84 | }; |
| 85 | |
| 86 | #endif // RE2_UTIL_LOGGING_H__ |