log_severity.h

// Copyright (c) 2007, Google Inc.
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met:
//
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// notice, this list of conditions and the following disclaimer.
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// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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#ifndef BASE_LOG_SEVERITY_H__
#define BASE_LOG_SEVERITY_H__

// Annoying stuff for windows -- makes sure clients can import these functions
#ifndef GOOGLE_GLOG_DLL_DECL
# if defined(_WIN32) && !defined(__CYGWIN__)
#   define GOOGLE_GLOG_DLL_DECL  __declspec(dllimport)
# else
#   define GOOGLE_GLOG_DLL_DECL
# endif
#endif

// Variables of type LogSeverity are widely taken to lie in the range
// [0, NUM_SEVERITIES-1].  Be careful to preserve this assumption if
// you ever need to change their values or add a new severity.
typedef int LogSeverity;

const int GLOG_INFO = 0, GLOG_WARNING = 1, GLOG_ERROR = 2, GLOG_FATAL = 3,
  NUM_SEVERITIES = 4;
#ifndef GLOG_NO_ABBREVIATED_SEVERITIES
# ifdef ERROR
#  error ERROR macro is defined. Define GLOG_NO_ABBREVIATED_SEVERITIES before including logging.h. See the document for detail.
# endif
const int INFO = GLOG_INFO, WARNING = GLOG_WARNING,
  ERROR = GLOG_ERROR, FATAL = GLOG_FATAL;
#endif

// DFATAL is FATAL in debug mode, ERROR in normal mode
#ifdef NDEBUG
#define DFATAL_LEVEL ERROR
#else
#define DFATAL_LEVEL FATAL
#endif

extern GOOGLE_GLOG_DLL_DECL const char* const LogSeverityNames[NUM_SEVERITIES];

// NDEBUG usage helpers related to (RAW_)DCHECK:
//
// DEBUG_MODE is for small !NDEBUG uses like
//   if (DEBUG_MODE) foo.CheckThatFoo();
// instead of substantially more verbose
//   #ifndef NDEBUG
//     foo.CheckThatFoo();
//   #endif
//
// IF_DEBUG_MODE is for small !NDEBUG uses like
//   IF_DEBUG_MODE( string error; )
//   DCHECK(Foo(&error)) << error;
// instead of substantially more verbose
//   #ifndef NDEBUG
//     string error;
//     DCHECK(Foo(&error)) << error;
//   #endif
//
#ifdef NDEBUG
enum { DEBUG_MODE = 0 };
#define IF_DEBUG_MODE(x)
#else
enum { DEBUG_MODE = 1 };
#define IF_DEBUG_MODE(x) x
#endif

#endif  // BASE_LOG_SEVERITY_H__