michael@0: // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #ifndef BASE_LOGGING_H_
michael@0: #define BASE_LOGGING_H_
michael@0: 
michael@0: #include <string>
michael@0: #include <cstring>
michael@0: 
michael@0: #include "base/basictypes.h"
michael@0: #include "prlog.h"
michael@0: 
michael@0: #ifdef NO_CHROMIUM_LOGGING
michael@0: #include <sstream>
michael@0: #endif
michael@0: 
michael@0: // Replace the Chromium logging code with NSPR-based logging code and
michael@0: // some C++ wrappers to emulate std::ostream
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: enum LogSeverity {
michael@0:   LOG_INFO,
michael@0:   LOG_WARNING,
michael@0:   LOG_ERROR,
michael@0:   LOG_ERROR_REPORT,
michael@0:   LOG_FATAL,
michael@0:   LOG_0 = LOG_ERROR
michael@0: };
michael@0: 
michael@0: class Logger
michael@0: {
michael@0: public:
michael@0:   Logger(LogSeverity severity, const char* file, int line)
michael@0:     : mSeverity(severity)
michael@0:     , mFile(file)
michael@0:     , mLine(line)
michael@0:     , mMsg(NULL)
michael@0:   { }
michael@0: 
michael@0:   ~Logger();
michael@0: 
michael@0:   // not private so that the operator<< overloads can get to it
michael@0:   void printf(const char* fmt, ...);
michael@0: 
michael@0: private:
michael@0:   static PRLogModuleInfo* gChromiumPRLog;
michael@0:   static PRLogModuleInfo* GetLog();
michael@0: 
michael@0:   LogSeverity mSeverity;
michael@0:   const char* mFile;
michael@0:   int mLine;
michael@0:   char* mMsg;
michael@0: 
michael@0:   DISALLOW_EVIL_CONSTRUCTORS(Logger);
michael@0: };
michael@0: 
michael@0: class LogWrapper
michael@0: {
michael@0: public:
michael@0:   LogWrapper(LogSeverity severity, const char* file, int line) :
michael@0:     log(severity, file, line) { }
michael@0: 
michael@0:   operator Logger&() const { return log; }
michael@0: 
michael@0: private:
michael@0:   mutable Logger log;
michael@0: 
michael@0:   DISALLOW_EVIL_CONSTRUCTORS(LogWrapper);
michael@0: };
michael@0: 
michael@0: struct EmptyLog
michael@0: {
michael@0: };
michael@0: 
michael@0: } // namespace mozilla
michael@0: 
michael@0: mozilla::Logger& operator<<(mozilla::Logger& log, const char* s);
michael@0: mozilla::Logger& operator<<(mozilla::Logger& log, const std::string& s);
michael@0: mozilla::Logger& operator<<(mozilla::Logger& log, int i);
michael@0: mozilla::Logger& operator<<(mozilla::Logger& log, const std::wstring& s);
michael@0: mozilla::Logger& operator<<(mozilla::Logger& log, void* p);
michael@0: 
michael@0: template<class T>
michael@0: const mozilla::EmptyLog& operator <<(const mozilla::EmptyLog& log, const T&)
michael@0: {
michael@0:   return log;
michael@0: }
michael@0: 
michael@0: #ifdef NO_CHROMIUM_LOGGING
michael@0: #define CHROMIUM_LOG(info) std::stringstream()
michael@0: #define LOG_IF(info, condition) if (!(condition)) std::stringstream()
michael@0: #else
michael@0: #define CHROMIUM_LOG(info) mozilla::LogWrapper(mozilla::LOG_ ## info, __FILE__, __LINE__)
michael@0: #define LOG_IF(info, condition) \
michael@0:   if (!(condition)) mozilla::LogWrapper(mozilla::LOG_ ## info, __FILE__, __LINE__)
michael@0: #endif
michael@0: 
michael@0: 
michael@0: #ifdef DEBUG
michael@0: #define DLOG(info) CHROMIUM_LOG(info)
michael@0: #define DLOG_IF(info) LOG_IF(info)
michael@0: #define DCHECK(condition) CHECK(condition)
michael@0: #else
michael@0: #define DLOG(info) mozilla::EmptyLog()
michael@0: #define DLOG_IF(info, condition) mozilla::EmptyLog()
michael@0: #define DCHECK(condition) while (false && (condition)) mozilla::EmptyLog()
michael@0: #endif
michael@0: 
michael@0: #define LOG_ASSERT(cond) CHECK(0)
michael@0: #define DLOG_ASSERT(cond) DCHECK(0)
michael@0: 
michael@0: #define NOTREACHED() CHROMIUM_LOG(ERROR)
michael@0: #define NOTIMPLEMENTED() CHROMIUM_LOG(ERROR)
michael@0: 
michael@0: #define CHECK(condition) LOG_IF(FATAL, condition)
michael@0: 
michael@0: #define DCHECK_EQ(v1, v2) DCHECK((v1) == (v2))
michael@0: #define DCHECK_NE(v1, v2) DCHECK((v1) != (v2))
michael@0: #define DCHECK_LE(v1, v2) DCHECK((v1) <= (v2))
michael@0: #define DCHECK_LT(v1, v2) DCHECK((v1) < (v2))
michael@0: #define DCHECK_GE(v1, v2) DCHECK((v1) >= (v2))
michael@0: #define DCHECK_GT(v1, v2) DCHECK((v1) > (v2))
michael@0: 
michael@0: #endif  // BASE_LOGGING_H_