ipc/chromium/src/base/logging.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style license that can be
   5 // found in the LICENSE file.
   6
   7 #ifndef BASE_LOGGING_H_
   8 #define BASE_LOGGING_H_
   9
  10 #include <string>
  11 #include <cstring>
  12
  13 #include "base/basictypes.h"
  14 #include "mozilla/Attributes.h"
  15 #include "mozilla/Logging.h"
  16 #include "mozilla/Printf.h"
  17
  18 #ifdef NO_CHROMIUM_LOGGING
  19 #  include <sstream>
  20 #endif
  21
  22 // Replace the Chromium logging code with NSPR-based logging code and
  23 // some C++ wrappers to emulate std::ostream
  24
  25 namespace mozilla {
  26
  27 enum LogSeverity {
  28   LOG_INFO,
  29   LOG_WARNING,
  30   LOG_ERROR,
  31   LOG_ERROR_REPORT,
  32   LOG_FATAL,
  33   LOG_0 = LOG_ERROR
  34 };
  35
  36 class Logger {
  37  public:
  38   Logger(LogSeverity severity, const char* file, int line)
  39       : mSeverity(severity), mFile(file), mLine(line) {}
  40
  41   ~Logger();
  42
  43   // not private so that the operator<< overloads can get to it
  44   void printf(const char* fmt, ...) MOZ_FORMAT_PRINTF(2, 3);
  45
  46  private:
  47   static mozilla::LazyLogModule gChromiumPRLog;
  48   //  static PRLogModuleInfo* GetLog();
  49
  50   LogSeverity mSeverity;
  51   const char* mFile;
  52   int mLine;
  53   SmprintfPointer mMsg;
  54
  55   DISALLOW_EVIL_CONSTRUCTORS(Logger);
  56 };
  57
  58 class LogWrapper {
  59  public:
  60   LogWrapper(LogSeverity severity, const char* file, int line)
  61       : log(severity, file, line) {}
  62
  63   operator Logger&() const { return log; }
  64
  65  private:
  66   mutable Logger log;
  67
  68   DISALLOW_EVIL_CONSTRUCTORS(LogWrapper);
  69 };
  70
  71 struct EmptyLog {};
  72
  73 mozilla::Logger& operator<<(mozilla::Logger& log, const char* s);
  74 mozilla::Logger& operator<<(mozilla::Logger& log, const std::string& s);
  75 mozilla::Logger& operator<<(mozilla::Logger& log, int i);
  76 mozilla::Logger& operator<<(mozilla::Logger& log, const std::wstring& s);
  77 mozilla::Logger& operator<<(mozilla::Logger& log, void* p);
  78
  79 template <class T>
  80 const mozilla::EmptyLog& operator<<(const mozilla::EmptyLog& log, const T&) {
  81   return log;
  82 }
  83
  84 }  // namespace mozilla
  85
  86 #ifdef NO_CHROMIUM_LOGGING
  87 #  define CHROMIUM_LOG(info) std::stringstream()
  88 #  define LOG_IF(info, condition) \
  89     if (!(condition)) std::stringstream()
  90 #else
  91 #  define CHROMIUM_LOG(info) \
  92     mozilla::LogWrapper(mozilla::LOG_##info, __FILE__, __LINE__)
  93 #  define LOG_IF(info, condition) \
  94     if (!(condition))             \
  95     mozilla::LogWrapper(mozilla::LOG_##info, __FILE__, __LINE__)
  96 #endif
  97
  98 #ifdef DEBUG
  99 #  define DLOG(info) CHROMIUM_LOG(info)
 100 #  define DLOG_IF(info, condition) LOG_IF(info, condition)
 101 #  define DCHECK(condition) CHECK(condition)
 102 #else
 103 #  define DLOG(info) mozilla::EmptyLog()
 104 #  define DLOG_IF(info, condition) mozilla::EmptyLog()
 105 #  define DCHECK(condition) \
 106     while (false && (condition)) mozilla::EmptyLog()
 107 #endif
 108
 109 #define DVLOG(level) DLOG(INFO)
 110
 111 #undef LOG_ASSERT
 112 #define LOG_ASSERT(cond) CHECK(0)
 113 #define DLOG_ASSERT(cond) DCHECK(0)
 114
 115 #define NOTREACHED() CHROMIUM_LOG(ERROR)
 116 #define NOTIMPLEMENTED() CHROMIUM_LOG(ERROR)
 117
 118 #undef CHECK
 119 #ifdef FUZZING
 120 #  define CHECK(condition) LOG_IF(WARNING, condition)
 121 #else
 122 #  define CHECK(condition) LOG_IF(FATAL, condition)
 123 #endif
 124
 125 #define DCHECK_EQ(v1, v2) DCHECK((v1) == (v2))
 126 #define DCHECK_NE(v1, v2) DCHECK((v1) != (v2))
 127 #define DCHECK_LE(v1, v2) DCHECK((v1) <= (v2))
 128 #define DCHECK_LT(v1, v2) DCHECK((v1) < (v2))
 129 #define DCHECK_GE(v1, v2) DCHECK((v1) >= (v2))
 130 #define DCHECK_GT(v1, v2) DCHECK((v1) > (v2))
 131
 132 #endif  // BASE_LOGGING_H_