| // Copyright 2009 The RE2 Authors. All Rights Reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| #ifndef UTIL_LOGGING_H_ |
| #define UTIL_LOGGING_H_ |
| |
| // Simplified version of Google's logging. |
| |
| #include <assert.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <ostream> |
| #include <sstream> |
| |
| #include "util/util.h" |
| |
| // Debug-only checking. |
| #define DCHECK(condition) assert(condition) |
| #define DCHECK_EQ(val1, val2) assert((val1) == (val2)) |
| #define DCHECK_NE(val1, val2) assert((val1) != (val2)) |
| #define DCHECK_LE(val1, val2) assert((val1) <= (val2)) |
| #define DCHECK_LT(val1, val2) assert((val1) < (val2)) |
| #define DCHECK_GE(val1, val2) assert((val1) >= (val2)) |
| #define DCHECK_GT(val1, val2) assert((val1) > (val2)) |
| |
| // Always-on checking |
| #define CHECK(x) if(x){}else LogMessageFatal(__FILE__, __LINE__).stream() << "Check failed: " #x |
| #define CHECK_LT(x, y) CHECK((x) < (y)) |
| #define CHECK_GT(x, y) CHECK((x) > (y)) |
| #define CHECK_LE(x, y) CHECK((x) <= (y)) |
| #define CHECK_GE(x, y) CHECK((x) >= (y)) |
| #define CHECK_EQ(x, y) CHECK((x) == (y)) |
| #define CHECK_NE(x, y) CHECK((x) != (y)) |
| |
| #define LOG_INFO LogMessage(__FILE__, __LINE__) |
| #define LOG_WARNING LogMessage(__FILE__, __LINE__) |
| #define LOG_ERROR LogMessage(__FILE__, __LINE__) |
| #define LOG_FATAL LogMessageFatal(__FILE__, __LINE__) |
| #define LOG_QFATAL LOG_FATAL |
| |
| // It seems that one of the Windows header files defines ERROR as 0. |
| #ifdef _WIN32 |
| #define LOG_0 LOG_INFO |
| #endif |
| |
| #ifdef NDEBUG |
| #define LOG_DFATAL LOG_ERROR |
| #else |
| #define LOG_DFATAL LOG_FATAL |
| #endif |
| |
| #define LOG(severity) LOG_ ## severity.stream() |
| |
| #define VLOG(x) if((x)>0){}else LOG_INFO.stream() |
| |
| class LogMessage { |
| public: |
| LogMessage(const char* file, int line) |
| : flushed_(false) { |
| stream() << file << ":" << line << ": "; |
| } |
| void Flush() { |
| stream() << "\n"; |
| string s = str_.str(); |
| size_t n = s.size(); |
| if (fwrite(s.data(), 1, n, stderr) < n) {} // shut up gcc |
| flushed_ = true; |
| } |
| ~LogMessage() { |
| if (!flushed_) { |
| Flush(); |
| } |
| } |
| std::ostream& stream() { return str_; } |
| |
| private: |
| bool flushed_; |
| std::ostringstream str_; |
| |
| LogMessage(const LogMessage&) = delete; |
| LogMessage& operator=(const LogMessage&) = delete; |
| }; |
| |
| // Silence "destructor never returns" warning for ~LogMessageFatal(). |
| // Since this is a header file, push and then pop to limit the scope. |
| #ifdef _MSC_VER |
| #pragma warning(push) |
| #pragma warning(disable: 4722) |
| #endif |
| |
| class LogMessageFatal : public LogMessage { |
| public: |
| LogMessageFatal(const char* file, int line) |
| : LogMessage(file, line) {} |
| ATTRIBUTE_NORETURN ~LogMessageFatal() { |
| Flush(); |
| abort(); |
| } |
| private: |
| LogMessageFatal(const LogMessageFatal&) = delete; |
| LogMessageFatal& operator=(const LogMessageFatal&) = delete; |
| }; |
| |
| #ifdef _MSC_VER |
| #pragma warning(pop) |
| #endif |
| |
| #endif // UTIL_LOGGING_H_ |