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 #ifndef WIN32 11 #include <unistd.h> /* for write */ 12 #endif 13 #include <sstream> 14 #ifdef WIN32 15 #include <io.h> 16 #endif 17 18 // Debug-only checking. 19 #define DCHECK(condition) assert(condition) 20 #define DCHECK_EQ(val1, val2) assert((val1) == (val2)) 21 #define DCHECK_NE(val1, val2) assert((val1) != (val2)) 22 #define DCHECK_LE(val1, val2) assert((val1) <= (val2)) 23 #define DCHECK_LT(val1, val2) assert((val1) < (val2)) 24 #define DCHECK_GE(val1, val2) assert((val1) >= (val2)) 25 #define DCHECK_GT(val1, val2) assert((val1) > (val2)) 26 27 // Always-on checking 28 #define CHECK(x) if(x){}else LogMessageFatal(__FILE__, __LINE__).stream() << "Check failed: " #x 29 #define CHECK_LT(x, y) CHECK((x) < (y)) 30 #define CHECK_GT(x, y) CHECK((x) > (y)) 31 #define CHECK_LE(x, y) CHECK((x) <= (y)) 32 #define CHECK_GE(x, y) CHECK((x) >= (y)) 33 #define CHECK_EQ(x, y) CHECK((x) == (y)) 34 #define CHECK_NE(x, y) CHECK((x) != (y)) 35 36 #define LOG_INFO LogMessage(__FILE__, __LINE__) 37 #define LOG_ERROR LOG_INFO 38 #define LOG_WARNING LOG_INFO 39 #define LOG_FATAL LogMessageFatal(__FILE__, __LINE__) 40 #define LOG_QFATAL LOG_FATAL 41 42 #define VLOG(x) if((x)>0){}else LOG_INFO.stream() 43 44 #ifdef NDEBUG 45 #define DEBUG_MODE 0 46 #define LOG_DFATAL LOG_ERROR 47 #else 48 #define DEBUG_MODE 1 49 #define LOG_DFATAL LOG_FATAL 50 #endif 51 52 #define LOG(severity) LOG_ ## severity.stream() 53 54 class LogMessage { 55 public: 56 LogMessage(const char* file, int line) : flushed_(false) { 57 stream() << file << ":" << line << ": "; 58 } 59 void Flush() { 60 stream() << "\n"; 61 string s = str_.str(); 62 int n = (int)s.size(); // shut up msvc 63 if(write(2, s.data(), n) < 0) {} // shut up gcc 64 flushed_ = true; 65 } 66 ~LogMessage() { 67 if (!flushed_) { 68 Flush(); 69 } 70 } 71 ostream& stream() { return str_; } 72 73 private: 74 bool flushed_; 75 std::ostringstream str_; 76 DISALLOW_EVIL_CONSTRUCTORS(LogMessage); 77 }; 78 79 class LogMessageFatal : public LogMessage { 80 public: 81 LogMessageFatal(const char* file, int line) 82 : LogMessage(file, line) { } 83 ~LogMessageFatal() { 84 Flush(); 85 abort(); 86 } 87 private: 88 DISALLOW_EVIL_CONSTRUCTORS(LogMessageFatal); 89 }; 90 91 #endif // RE2_UTIL_LOGGING_H__ 92
