From 6febec361e73860cc77d9cb0c6c14013c0e36ef0 Mon Sep 17 00:00:00 2001
From:  <shinichiro.hamaji@gmail.com>
Date: Wed, 11 Jan 2012 09:17:04 +0000
Subject: [PATCH] Define GLOG_ prefixed log severities

Users can control if usual log severity values will be defined by
GLOG_NO_ABBREVIATED_SEVERITIES.

For http://code.google.com/p/google-glog/issues/detail?id=105



git-svn-id: https://google-glog.googlecode.com/svn/trunk@101 eb4d4688-79bd-11dd-afb4-1d65580434c0
---
 doc/glog.html                   | 44 ++++++++++++++++++++-
 src/glog/log_severity.h         | 10 ++++-
 src/glog/logging.h.in           | 69 +++++++++++++++++++++------------
 src/glog/raw_logging.h.in       | 10 ++---
 src/logging.cc                  | 18 ++++-----
 src/logging_unittest.cc         | 60 ++++++++++++++--------------
 src/raw_logging.cc              |  2 +-
 src/windows/glog/log_severity.h | 10 ++++-
 src/windows/glog/logging.h      | 69 +++++++++++++++++++++------------
 src/windows/glog/raw_logging.h  | 10 ++---
 10 files changed, 200 insertions(+), 102 deletions(-)

diff --git a/doc/glog.html b/doc/glog.html
index a2d093d..a104659 100644
--- a/doc/glog.html
+++ b/doc/glog.html
@@ -527,8 +527,48 @@ all log messages associated with <code>VLOG</code>s as well as
 <h3><A NAME=windows>Notes for Windows users</A></h3>
 
 <p>Google glog defines a severity level <code>ERROR</code>, which is
-also defined in <code>windows.h</code>
-There are two known workarounds to avoid this conflict:
+also defined in <code>windows.h</code> . You can make glog not define
+<code>INFO</code>, <code>WARNING</code>, <code>ERROR</code>,
+and <code>FATAL</code> by defining
+<code>GLOG_NO_ABBREVIATED_SEVERITIES</code> before
+including <code>glog/logging.h</code> . Even with this macro, you can
+still use the iostream like logging facilities:
+
+<pre>
+  #define GLOG_NO_ABBREVIATED_SEVERITIES
+  #include &lt;windows.h&gt;
+  #include &lt;glog/logging.h&gt;
+
+  // ...
+
+  LOG(ERROR) &lt;&lt; "This should work";
+  LOG_IF(ERROR, x &gt; y) &lt;&lt; "This should be also OK";
+</pre>
+
+<p>
+However, you cannot
+use <code>INFO</code>, <code>WARNING</code>, <code>ERROR</code>,
+and <code>FATAL</code> anymore for functions defined
+in <code>glog/logging.h</code> .
+
+<pre>
+  #define GLOG_NO_ABBREVIATED_SEVERITIES
+  #include &lt;windows.h&gt;
+  #include &lt;glog/logging.h&gt;
+
+  // ...
+
+  // This won't work.
+  // google::FlushLogFiles(google::ERROR);
+
+  // Use this instead.
+  google::FlushLogFiles(google::GLOG_ERROR);
+</pre>
+
+<p>
+If you don't need <code>ERROR</code> defined
+by <code>windows.h</code>, there are a couple of more workarounds
+which sometimes don't work:
 
 <ul>
   <li>#define <code>WIN32_LEAN_AND_MEAN</code> or <code>NOGDI</code>
diff --git a/src/glog/log_severity.h b/src/glog/log_severity.h
index 17805fb..99945a4 100644
--- a/src/glog/log_severity.h
+++ b/src/glog/log_severity.h
@@ -44,7 +44,15 @@
 // you ever need to change their values or add a new severity.
 typedef int LogSeverity;
 
-const int INFO = 0, WARNING = 1, ERROR = 2, FATAL = 3, NUM_SEVERITIES = 4;
+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
diff --git a/src/glog/logging.h.in b/src/glog/logging.h.in
index 57e4a7d..f693068 100644
--- a/src/glog/logging.h.in
+++ b/src/glog/logging.h.in
@@ -368,7 +368,7 @@ DECLARE_bool(stop_logging_if_full_disk);
 #define COMPACT_GOOGLE_LOG_INFO @ac_google_namespace@::LogMessage( \
       __FILE__, __LINE__)
 #define LOG_TO_STRING_INFO(message) @ac_google_namespace@::LogMessage( \
-      __FILE__, __LINE__, @ac_google_namespace@::INFO, message)
+      __FILE__, __LINE__, @ac_google_namespace@::GLOG_INFO, message)
 #else
 #define COMPACT_GOOGLE_LOG_INFO @ac_google_namespace@::NullStream()
 #define LOG_TO_STRING_INFO(message) @ac_google_namespace@::NullStream()
@@ -376,9 +376,9 @@ DECLARE_bool(stop_logging_if_full_disk);
 
 #if GOOGLE_STRIP_LOG <= 1
 #define COMPACT_GOOGLE_LOG_WARNING @ac_google_namespace@::LogMessage( \
-      __FILE__, __LINE__, @ac_google_namespace@::WARNING)
+      __FILE__, __LINE__, @ac_google_namespace@::GLOG_WARNING)
 #define LOG_TO_STRING_WARNING(message) @ac_google_namespace@::LogMessage( \
-      __FILE__, __LINE__, @ac_google_namespace@::WARNING, message)
+      __FILE__, __LINE__, @ac_google_namespace@::GLOG_WARNING, message)
 #else
 #define COMPACT_GOOGLE_LOG_WARNING @ac_google_namespace@::NullStream()
 #define LOG_TO_STRING_WARNING(message) @ac_google_namespace@::NullStream()
@@ -386,9 +386,9 @@ DECLARE_bool(stop_logging_if_full_disk);
 
 #if GOOGLE_STRIP_LOG <= 2
 #define COMPACT_GOOGLE_LOG_ERROR @ac_google_namespace@::LogMessage( \
-      __FILE__, __LINE__, @ac_google_namespace@::ERROR)
+      __FILE__, __LINE__, @ac_google_namespace@::GLOG_ERROR)
 #define LOG_TO_STRING_ERROR(message) @ac_google_namespace@::LogMessage( \
-      __FILE__, __LINE__, @ac_google_namespace@::ERROR, message)
+      __FILE__, __LINE__, @ac_google_namespace@::GLOG_ERROR, message)
 #else
 #define COMPACT_GOOGLE_LOG_ERROR @ac_google_namespace@::NullStream()
 #define LOG_TO_STRING_ERROR(message) @ac_google_namespace@::NullStream()
@@ -398,7 +398,7 @@ DECLARE_bool(stop_logging_if_full_disk);
 #define COMPACT_GOOGLE_LOG_FATAL @ac_google_namespace@::LogMessageFatal( \
       __FILE__, __LINE__)
 #define LOG_TO_STRING_FATAL(message) @ac_google_namespace@::LogMessage( \
-      __FILE__, __LINE__, @ac_google_namespace@::FATAL, message)
+      __FILE__, __LINE__, @ac_google_namespace@::GLOG_FATAL, message)
 #else
 #define COMPACT_GOOGLE_LOG_FATAL @ac_google_namespace@::NullStreamFatal()
 #define LOG_TO_STRING_FATAL(message) @ac_google_namespace@::NullStreamFatal()
@@ -410,32 +410,32 @@ DECLARE_bool(stop_logging_if_full_disk);
 #define COMPACT_GOOGLE_LOG_DFATAL COMPACT_GOOGLE_LOG_ERROR
 #elif GOOGLE_STRIP_LOG <= 3
 #define COMPACT_GOOGLE_LOG_DFATAL @ac_google_namespace@::LogMessage( \
-      __FILE__, __LINE__, @ac_google_namespace@::FATAL)
+      __FILE__, __LINE__, @ac_google_namespace@::GLOG_FATAL)
 #else
 #define COMPACT_GOOGLE_LOG_DFATAL @ac_google_namespace@::NullStreamFatal()
 #endif
 
-#define GOOGLE_LOG_INFO(counter) @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::INFO, counter, &@ac_google_namespace@::LogMessage::SendToLog)
+#define GOOGLE_LOG_INFO(counter) @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::GLOG_INFO, counter, &@ac_google_namespace@::LogMessage::SendToLog)
 #define SYSLOG_INFO(counter) \
-  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::INFO, counter, \
+  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::GLOG_INFO, counter, \
   &@ac_google_namespace@::LogMessage::SendToSyslogAndLog)
 #define GOOGLE_LOG_WARNING(counter)  \
-  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::WARNING, counter, \
+  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::GLOG_WARNING, counter, \
   &@ac_google_namespace@::LogMessage::SendToLog)
 #define SYSLOG_WARNING(counter)  \
-  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::WARNING, counter, \
+  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::GLOG_WARNING, counter, \
   &@ac_google_namespace@::LogMessage::SendToSyslogAndLog)
 #define GOOGLE_LOG_ERROR(counter)  \
-  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::ERROR, counter, \
+  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::GLOG_ERROR, counter, \
   &@ac_google_namespace@::LogMessage::SendToLog)
 #define SYSLOG_ERROR(counter)  \
-  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::ERROR, counter, \
+  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::GLOG_ERROR, counter, \
   &@ac_google_namespace@::LogMessage::SendToSyslogAndLog)
 #define GOOGLE_LOG_FATAL(counter) \
-  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::FATAL, counter, \
+  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::GLOG_FATAL, counter, \
   &@ac_google_namespace@::LogMessage::SendToLog)
 #define SYSLOG_FATAL(counter) \
-  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::FATAL, counter, \
+  @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::GLOG_FATAL, counter, \
   &@ac_google_namespace@::LogMessage::SendToSyslogAndLog)
 #define GOOGLE_LOG_DFATAL(counter) \
   @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::DFATAL_LEVEL, counter, \
@@ -454,7 +454,7 @@ DECLARE_bool(stop_logging_if_full_disk);
                          FORMAT_MESSAGE_FROM_SYSTEM, \
                          0, result, 0, msg, 100, NULL); \
     if (message_length > 0) { \
-      @ac_google_namespace@::LogMessage(__FILE__, __LINE__, ERROR, 0, \
+      @ac_google_namespace@::LogMessage(__FILE__, __LINE__, @ac_google_namespace@::GLOG_ERROR, 0, \
           &@ac_google_namespace@::LogMessage::SendToLog).stream() << message; \
       LocalFree(message); \
     } \
@@ -501,12 +501,12 @@ class LogSink;  // defined below
 #define LOG_TO_SINK(sink, severity) \
   @ac_google_namespace@::LogMessage(                                    \
       __FILE__, __LINE__,                                               \
-      @ac_google_namespace@::severity,                                  \
+      @ac_google_namespace@::GLOG_ ## severity,                         \
       static_cast<@ac_google_namespace@::LogSink*>(sink), true).stream()
 #define LOG_TO_SINK_BUT_NOT_TO_LOGFILE(sink, severity)                  \
   @ac_google_namespace@::LogMessage(                                    \
       __FILE__, __LINE__,                                               \
-      @ac_google_namespace@::severity,                                  \
+      @ac_google_namespace@::GLOG_ ## severity,                         \
       static_cast<@ac_google_namespace@::LogSink*>(sink), false).stream()
 
 // If a non-NULL string pointer is given, we write this message to that string.
@@ -771,7 +771,7 @@ DECLARE_CHECK_STROP_IMPL(strcasecmp, false)
 
 #define GOOGLE_PLOG(severity, counter)  \
   @ac_google_namespace@::ErrnoLogMessage( \
-      __FILE__, __LINE__, @ac_google_namespace@::severity, counter, \
+      __FILE__, __LINE__, @ac_google_namespace@::GLOG_ ## severity, counter, \
       &@ac_google_namespace@::LogMessage::SendToLog)
 
 #define PLOG_IF(severity, condition) \
@@ -810,7 +810,7 @@ PLOG_IF(FATAL, GOOGLE_PREDICT_BRANCH_NOT_TAKEN((invocation) == -1))    \
   if (++LOG_OCCURRENCES_MOD_N > n) LOG_OCCURRENCES_MOD_N -= n; \
   if (LOG_OCCURRENCES_MOD_N == 1) \
     @ac_google_namespace@::LogMessage( \
-        __FILE__, __LINE__, @ac_google_namespace@::severity, LOG_OCCURRENCES, \
+        __FILE__, __LINE__, @ac_google_namespace@::GLOG_ ## severity, LOG_OCCURRENCES, \
         &what_to_do).stream()
 
 #define SOME_KIND_OF_LOG_IF_EVERY_N(severity, condition, n, what_to_do) \
@@ -819,7 +819,7 @@ PLOG_IF(FATAL, GOOGLE_PREDICT_BRANCH_NOT_TAKEN((invocation) == -1))    \
   if (condition && \
       ((LOG_OCCURRENCES_MOD_N=(LOG_OCCURRENCES_MOD_N + 1) % n) == (1 % n))) \
     @ac_google_namespace@::LogMessage( \
-        __FILE__, __LINE__, @ac_google_namespace@::severity, LOG_OCCURRENCES, \
+        __FILE__, __LINE__, @ac_google_namespace@::GLOG_ ## severity, LOG_OCCURRENCES, \
                  &what_to_do).stream()
 
 #define SOME_KIND_OF_PLOG_EVERY_N(severity, n, what_to_do) \
@@ -828,7 +828,7 @@ PLOG_IF(FATAL, GOOGLE_PREDICT_BRANCH_NOT_TAKEN((invocation) == -1))    \
   if (++LOG_OCCURRENCES_MOD_N > n) LOG_OCCURRENCES_MOD_N -= n; \
   if (LOG_OCCURRENCES_MOD_N == 1) \
     @ac_google_namespace@::ErrnoLogMessage( \
-        __FILE__, __LINE__, @ac_google_namespace@::severity, LOG_OCCURRENCES, \
+        __FILE__, __LINE__, @ac_google_namespace@::GLOG_ ## severity, LOG_OCCURRENCES, \
         &what_to_do).stream()
 
 #define SOME_KIND_OF_LOG_FIRST_N(severity, n, what_to_do) \
@@ -837,7 +837,7 @@ PLOG_IF(FATAL, GOOGLE_PREDICT_BRANCH_NOT_TAKEN((invocation) == -1))    \
     ++LOG_OCCURRENCES; \
   if (LOG_OCCURRENCES <= n) \
     @ac_google_namespace@::LogMessage( \
-        __FILE__, __LINE__, @ac_google_namespace@::severity, LOG_OCCURRENCES, \
+        __FILE__, __LINE__, @ac_google_namespace@::GLOG_ ## severity, LOG_OCCURRENCES, \
         &what_to_do).stream()
 
 namespace glog_internal_namespace_ {
@@ -851,7 +851,7 @@ struct CrashReason;
   typedef @ac_google_namespace@::glog_internal_namespace_::CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
 
 #define LOG_EVERY_N(severity, n)                                        \
-  GOOGLE_GLOG_COMPILE_ASSERT(@ac_google_namespace@::severity <          \
+  GOOGLE_GLOG_COMPILE_ASSERT(@ac_google_namespace@::GLOG_ ## severity < \
                              @ac_google_namespace@::NUM_SEVERITIES,     \
                              INVALID_REQUESTED_LOG_SEVERITY);           \
   SOME_KIND_OF_LOG_EVERY_N(severity, (n), @ac_google_namespace@::LogMessage::SendToLog)
@@ -871,6 +871,27 @@ struct CrashReason;
 // We want the special COUNTER value available for LOG_EVERY_X()'ed messages
 enum PRIVATE_Counter {COUNTER};
 
+#ifdef GLOG_NO_ABBREVIATED_SEVERITIES
+// wingdi.h defines ERROR to be 0. When we call LOG(ERROR), it gets
+// substituted with 0, and it expands to COMPACT_GOOGLE_LOG_0. To allow us
+// to keep using this syntax, we define this macro to do the same thing
+// as COMPACT_GOOGLE_LOG_ERROR.
+#define COMPACT_GOOGLE_LOG_0 COMPACT_GOOGLE_LOG_ERROR
+#define SYSLOG_0 SYSLOG_ERROR
+#define LOG_TO_STRING_0 LOG_TO_STRING_ERROR
+// Needed for LOG_IS_ON(ERROR).
+const LogSeverity GLOG_0 = GLOG_ERROR;
+#else
+// Users may include windows.h after logging.h without
+// GLOG_NO_ABBREVIATED_SEVERITIES nor WIN32_LEAN_AND_MEAN.
+// For this case, we cannot detect if ERROR is defined before users
+// actually use ERROR. Let's make an undefined symbol to warn users.
+# define GLOG_ERROR_MSG ERROR_macro_is_defined_Define_GLOG_NO_ABBREVIATED_SEVERITIES_before_including_logging_h_See_the_document_for_detail
+# define COMPACT_GOOGLE_LOG_0 GLOG_ERROR_MSG
+# define SYSLOG_0 GLOG_ERROR_MSG
+# define LOG_TO_STRING_0 GLOG_ERROR_MSG
+# define GLOG_0 GLOG_ERROR_MSG
+#endif
 
 // Plus some debug-logging macros that get compiled to nothing for production
 
diff --git a/src/glog/raw_logging.h.in b/src/glog/raw_logging.h.in
index 702b646..fa17057 100644
--- a/src/glog/raw_logging.h.in
+++ b/src/glog/raw_logging.h.in
@@ -68,7 +68,7 @@
 //   I0821 211317 file.cc:142] RAW: status is 20
 #define RAW_LOG(severity, ...) \
   do { \
-    switch (@ac_google_namespace@::severity) {  \
+    switch (@ac_google_namespace@::GLOG_ ## severity) {  \
       case 0: \
         RAW_LOG_INFO(__VA_ARGS__); \
         break; \
@@ -100,28 +100,28 @@
 #endif // STRIP_LOG == 0
 
 #if STRIP_LOG == 0
-#define RAW_LOG_INFO(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::INFO, \
+#define RAW_LOG_INFO(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::GLOG_INFO, \
                                    __FILE__, __LINE__, __VA_ARGS__)
 #else
 #define RAW_LOG_INFO(...) @ac_google_namespace@::RawLogStub__(0, __VA_ARGS__)
 #endif // STRIP_LOG == 0
 
 #if STRIP_LOG <= 1
-#define RAW_LOG_WARNING(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::WARNING,   \
+#define RAW_LOG_WARNING(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::GLOG_WARNING,   \
                                       __FILE__, __LINE__, __VA_ARGS__)
 #else
 #define RAW_LOG_WARNING(...) @ac_google_namespace@::RawLogStub__(0, __VA_ARGS__)
 #endif // STRIP_LOG <= 1
 
 #if STRIP_LOG <= 2
-#define RAW_LOG_ERROR(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::ERROR,       \
+#define RAW_LOG_ERROR(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::GLOG_ERROR,       \
                                     __FILE__, __LINE__, __VA_ARGS__)
 #else
 #define RAW_LOG_ERROR(...) @ac_google_namespace@::RawLogStub__(0, __VA_ARGS__)
 #endif // STRIP_LOG <= 2
 
 #if STRIP_LOG <= 3
-#define RAW_LOG_FATAL(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::FATAL,       \
+#define RAW_LOG_FATAL(...) @ac_google_namespace@::RawLog__(@ac_google_namespace@::GLOG_FATAL,       \
                                     __FILE__, __LINE__, __VA_ARGS__)
 #else
 #define RAW_LOG_FATAL(...) \
diff --git a/src/logging.cc b/src/logging.cc
index 445d9f9..d768b95 100644
--- a/src/logging.cc
+++ b/src/logging.cc
@@ -111,7 +111,7 @@ _END_GOOGLE_NAMESPACE_
 // The default is ERROR instead of FATAL so that users can see problems
 // when they run a program without having to look in another file.
 DEFINE_int32(stderrthreshold,
-             GOOGLE_NAMESPACE::ERROR,
+             GOOGLE_NAMESPACE::GLOG_ERROR,
              "log messages at or above this level are copied to stderr in "
              "addition to logfiles.  This flag obsoletes --alsologtostderr.");
 
@@ -950,12 +950,12 @@ LogMessage::LogMessage(const char* file, int line, LogSeverity severity,
 
 LogMessage::LogMessage(const char* file, int line,
                        const CheckOpString& result) {
-  Init(file, line, FATAL, &LogMessage::SendToLog);
+  Init(file, line, GLOG_FATAL, &LogMessage::SendToLog);
   stream() << "Check failed: " << (*result.str_) << " ";
 }
 
 LogMessage::LogMessage(const char* file, int line) {
-  Init(file, line, INFO, &LogMessage::SendToLog);
+  Init(file, line, GLOG_INFO, &LogMessage::SendToLog);
 }
 
 LogMessage::LogMessage(const char* file, int line, LogSeverity severity) {
@@ -986,7 +986,7 @@ void LogMessage::Init(const char* file,
                       LogSeverity severity,
                       void (LogMessage::*send_method)()) {
   allocated_ = NULL;
-  if (severity != FATAL || !exit_on_dfatal) {
+  if (severity != GLOG_FATAL || !exit_on_dfatal) {
     allocated_ = new LogMessageData();
     data_ = allocated_;
     data_->buf_ = new char[kMaxLogMessageLen+1];
@@ -1137,7 +1137,7 @@ void ReprintFatalMessage() {
       // Also write to stderr
       WriteToStderr(fatal_message, n);
     }
-    LogDestination::LogToAllLogfiles(ERROR, fatal_time, fatal_message, n);
+    LogDestination::LogToAllLogfiles(GLOG_ERROR, fatal_time, fatal_message, n);
   }
 }
 
@@ -1195,7 +1195,7 @@ void LogMessage::SendToLog() EXCLUSIVE_LOCKS_REQUIRED(log_mutex) {
   // If we log a FATAL message, flush all the log destinations, then toss
   // a signal for others to catch. We leave the logs in a state that
   // someone else can use them (as long as they flush afterwards)
-  if (data_->severity_ == FATAL && exit_on_dfatal) {
+  if (data_->severity_ == GLOG_FATAL && exit_on_dfatal) {
     if (data_->first_fatal_) {
       // Store crash information so that it is accessible from within signal
       // handlers that may be invoked later.
@@ -1645,9 +1645,9 @@ void TruncateLogFile(const char *path, int64 limit, int64 keep) {
       // rather scary.
       // Instead just truncate the file to something we can manage
       if (truncate(path, 0) == -1) {
-	PLOG(ERROR) << "Unable to truncate " << path;
+        PLOG(ERROR) << "Unable to truncate " << path;
       } else {
-	LOG(ERROR) << "Truncated " << path << " due to EFBIG error";
+        LOG(ERROR) << "Truncated " << path << " due to EFBIG error";
       }
     } else {
       PLOG(ERROR) << "Unable to open " << path;
@@ -1783,7 +1783,7 @@ int posix_strerror_r(int err, char *buf, size_t len) {
 }
 
 LogMessageFatal::LogMessageFatal(const char* file, int line) :
-    LogMessage(file, line, FATAL) {}
+    LogMessage(file, line, GLOG_FATAL) {}
 
 LogMessageFatal::LogMessageFatal(const char* file, int line,
                                  const CheckOpString& result) :
diff --git a/src/logging_unittest.cc b/src/logging_unittest.cc
index 5fc34d4..bb79b9a 100644
--- a/src/logging_unittest.cc
+++ b/src/logging_unittest.cc
@@ -201,7 +201,7 @@ int main(int argc, char **argv) {
   CaptureTestStderr();
 
   // re-emit early_stderr
-  LogMessage("dummy", LogMessage::kNoLogPrefix, INFO).stream() << early_stderr;
+  LogMessage("dummy", LogMessage::kNoLogPrefix, GLOG_INFO).stream() << early_stderr;
 
   TestLogging(true);
   TestRawLogging();
@@ -234,9 +234,9 @@ int main(int argc, char **argv) {
 }
 
 void TestLogging(bool check_counts) {
-  int64 base_num_infos   = LogMessage::num_messages(INFO);
-  int64 base_num_warning = LogMessage::num_messages(WARNING);
-  int64 base_num_errors  = LogMessage::num_messages(ERROR);
+  int64 base_num_infos   = LogMessage::num_messages(GLOG_INFO);
+  int64 base_num_warning = LogMessage::num_messages(GLOG_WARNING);
+  int64 base_num_errors  = LogMessage::num_messages(GLOG_ERROR);
 
   LOG(INFO) << string("foo ") << "bar " << 10 << ' ' << 3.4;
   for ( int i = 0; i < 10; ++i ) {
@@ -266,12 +266,12 @@ void TestLogging(bool check_counts) {
   LOG(ERROR) << string("foo") << ' '<< j << ' ' << setw(10) << j << " "
              << setw(1) << hex << j;
 
-  LogMessage("foo", LogMessage::kNoLogPrefix, INFO).stream() << "no prefix";
+  LogMessage("foo", LogMessage::kNoLogPrefix, GLOG_INFO).stream() << "no prefix";
 
   if (check_counts) {
-    CHECK_EQ(base_num_infos   + 14, LogMessage::num_messages(INFO));
-    CHECK_EQ(base_num_warning + 3,  LogMessage::num_messages(WARNING));
-    CHECK_EQ(base_num_errors  + 15, LogMessage::num_messages(ERROR));
+    CHECK_EQ(base_num_infos   + 14, LogMessage::num_messages(GLOG_INFO));
+    CHECK_EQ(base_num_warning + 3,  LogMessage::num_messages(GLOG_WARNING));
+    CHECK_EQ(base_num_errors  + 15, LogMessage::num_messages(GLOG_ERROR));
   }
 }
 
@@ -416,16 +416,16 @@ void LogWithLevels(int v, int severity, bool err, bool alsoerr) {
 }
 
 void TestLoggingLevels() {
-  LogWithLevels(0, INFO, false, false);
-  LogWithLevels(1, INFO, false, false);
-  LogWithLevels(-1, INFO, false, false);
-  LogWithLevels(0, WARNING, false, false);
-  LogWithLevels(0, ERROR, false, false);
-  LogWithLevels(0, FATAL, false, false);
-  LogWithLevels(0, FATAL, true, false);
-  LogWithLevels(0, FATAL, false, true);
-  LogWithLevels(1, WARNING, false, false);
-  LogWithLevels(1, FATAL, false, true);
+  LogWithLevels(0, GLOG_INFO, false, false);
+  LogWithLevels(1, GLOG_INFO, false, false);
+  LogWithLevels(-1, GLOG_INFO, false, false);
+  LogWithLevels(0, GLOG_WARNING, false, false);
+  LogWithLevels(0, GLOG_ERROR, false, false);
+  LogWithLevels(0, GLOG_FATAL, false, false);
+  LogWithLevels(0, GLOG_FATAL, true, false);
+  LogWithLevels(0, GLOG_FATAL, false, true);
+  LogWithLevels(1, GLOG_WARNING, false, false);
+  LogWithLevels(1, GLOG_FATAL, false, true);
 }
 
 TEST(DeathRawCHECK, logging) {
@@ -508,7 +508,7 @@ void TestLogSink() {
 
   LOG(INFO) << "Captured by LOG_TO_SINK:";
   for (size_t i = 0; i < sink.errors.size(); ++i) {
-    LogMessage("foo", LogMessage::kNoLogPrefix, INFO).stream()
+    LogMessage("foo", LogMessage::kNoLogPrefix, GLOG_INFO).stream()
       << sink.errors[i];
   }
 }
@@ -667,9 +667,9 @@ static void TestBasename() {
   const string dest = FLAGS_test_tmpdir + "/logging_test_basename";
   DeleteFiles(dest + "*");
 
-  SetLogDestination(INFO, dest.c_str());
+  SetLogDestination(GLOG_INFO, dest.c_str());
   LOG(INFO) << "message to new base";
-  FlushLogFiles(INFO);
+  FlushLogFiles(GLOG_INFO);
 
   CheckFile(dest, "message to new base");
 
@@ -686,10 +686,10 @@ static void TestSymlink() {
   DeleteFiles(dest + "*");
   DeleteFiles(sym + "*");
 
-  SetLogSymlink(INFO, "symlinkbase");
-  SetLogDestination(INFO, dest.c_str());
+  SetLogSymlink(GLOG_INFO, "symlinkbase");
+  SetLogDestination(GLOG_INFO, dest.c_str());
   LOG(INFO) << "message to new symlink";
-  FlushLogFiles(INFO);
+  FlushLogFiles(GLOG_INFO);
   CheckFile(sym, "message to new symlink");
 
   DeleteFiles(dest + "*");
@@ -702,10 +702,10 @@ static void TestExtension() {
   string dest = FLAGS_test_tmpdir + "/logging_test_extension";
   DeleteFiles(dest + "*");
 
-  SetLogDestination(INFO, dest.c_str());
+  SetLogDestination(GLOG_INFO, dest.c_str());
   SetLogFilenameExtension("specialextension");
   LOG(INFO) << "message to new extension";
-  FlushLogFiles(INFO);
+  FlushLogFiles(GLOG_INFO);
   CheckFile(dest, "message to new extension");
 
   // Check that file name ends with extension
@@ -738,11 +738,11 @@ static void TestWrapper() {
   fprintf(stderr, "==== Test log wrapper\n");
 
   MyLogger my_logger;
-  base::Logger* old_logger = base::GetLogger(INFO);
-  base::SetLogger(INFO, &my_logger);
+  base::Logger* old_logger = base::GetLogger(GLOG_INFO);
+  base::SetLogger(GLOG_INFO, &my_logger);
   LOG(INFO) << "Send to wrapped logger";
-  FlushLogFiles(INFO);
-  base::SetLogger(INFO, old_logger);
+  FlushLogFiles(GLOG_INFO);
+  base::SetLogger(GLOG_INFO, old_logger);
 
   CHECK(strstr(my_logger.data.c_str(), "Send to wrapped logger") != NULL);
 }
diff --git a/src/raw_logging.cc b/src/raw_logging.cc
index 50c6a71..7a7409b 100644
--- a/src/raw_logging.cc
+++ b/src/raw_logging.cc
@@ -151,7 +151,7 @@ void RawLog__(LogSeverity severity, const char* file, int line,
   // libc (to side-step any libc interception).
   // We write just once to avoid races with other invocations of RawLog__.
   safe_write(STDERR_FILENO, buffer, strlen(buffer));
-  if (severity == FATAL)  {
+  if (severity == GLOG_FATAL)  {
     if (!sync_val_compare_and_swap(&crashed, false, true)) {
       crash_reason.filename = file;
       crash_reason.line_number = line;
diff --git a/src/windows/glog/log_severity.h b/src/windows/glog/log_severity.h
index 5e7d09e..22a4191 100644
--- a/src/windows/glog/log_severity.h
+++ b/src/windows/glog/log_severity.h
@@ -48,7 +48,15 @@
 // you ever need to change their values or add a new severity.
 typedef int LogSeverity;
 
-const int INFO = 0, WARNING = 1, ERROR = 2, FATAL = 3, NUM_SEVERITIES = 4;
+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
diff --git a/src/windows/glog/logging.h b/src/windows/glog/logging.h
index 74c332a..b22e791 100755
--- a/src/windows/glog/logging.h
+++ b/src/windows/glog/logging.h
@@ -372,7 +372,7 @@ DECLARE_bool(stop_logging_if_full_disk);
 #define COMPACT_GOOGLE_LOG_INFO google::LogMessage( \
       __FILE__, __LINE__)
 #define LOG_TO_STRING_INFO(message) google::LogMessage( \
-      __FILE__, __LINE__, google::INFO, message)
+      __FILE__, __LINE__, google::GLOG_INFO, message)
 #else
 #define COMPACT_GOOGLE_LOG_INFO google::NullStream()
 #define LOG_TO_STRING_INFO(message) google::NullStream()
@@ -380,9 +380,9 @@ DECLARE_bool(stop_logging_if_full_disk);
 
 #if GOOGLE_STRIP_LOG <= 1
 #define COMPACT_GOOGLE_LOG_WARNING google::LogMessage( \
-      __FILE__, __LINE__, google::WARNING)
+      __FILE__, __LINE__, google::GLOG_WARNING)
 #define LOG_TO_STRING_WARNING(message) google::LogMessage( \
-      __FILE__, __LINE__, google::WARNING, message)
+      __FILE__, __LINE__, google::GLOG_WARNING, message)
 #else
 #define COMPACT_GOOGLE_LOG_WARNING google::NullStream()
 #define LOG_TO_STRING_WARNING(message) google::NullStream()
@@ -390,9 +390,9 @@ DECLARE_bool(stop_logging_if_full_disk);
 
 #if GOOGLE_STRIP_LOG <= 2
 #define COMPACT_GOOGLE_LOG_ERROR google::LogMessage( \
-      __FILE__, __LINE__, google::ERROR)
+      __FILE__, __LINE__, google::GLOG_ERROR)
 #define LOG_TO_STRING_ERROR(message) google::LogMessage( \
-      __FILE__, __LINE__, google::ERROR, message)
+      __FILE__, __LINE__, google::GLOG_ERROR, message)
 #else
 #define COMPACT_GOOGLE_LOG_ERROR google::NullStream()
 #define LOG_TO_STRING_ERROR(message) google::NullStream()
@@ -402,7 +402,7 @@ DECLARE_bool(stop_logging_if_full_disk);
 #define COMPACT_GOOGLE_LOG_FATAL google::LogMessageFatal( \
       __FILE__, __LINE__)
 #define LOG_TO_STRING_FATAL(message) google::LogMessage( \
-      __FILE__, __LINE__, google::FATAL, message)
+      __FILE__, __LINE__, google::GLOG_FATAL, message)
 #else
 #define COMPACT_GOOGLE_LOG_FATAL google::NullStreamFatal()
 #define LOG_TO_STRING_FATAL(message) google::NullStreamFatal()
@@ -414,32 +414,32 @@ DECLARE_bool(stop_logging_if_full_disk);
 #define COMPACT_GOOGLE_LOG_DFATAL COMPACT_GOOGLE_LOG_ERROR
 #elif GOOGLE_STRIP_LOG <= 3
 #define COMPACT_GOOGLE_LOG_DFATAL google::LogMessage( \
-      __FILE__, __LINE__, google::FATAL)
+      __FILE__, __LINE__, google::GLOG_FATAL)
 #else
 #define COMPACT_GOOGLE_LOG_DFATAL google::NullStreamFatal()
 #endif
 
-#define GOOGLE_LOG_INFO(counter) google::LogMessage(__FILE__, __LINE__, google::INFO, counter, &google::LogMessage::SendToLog)
+#define GOOGLE_LOG_INFO(counter) google::LogMessage(__FILE__, __LINE__, google::GLOG_INFO, counter, &google::LogMessage::SendToLog)
 #define SYSLOG_INFO(counter) \
-  google::LogMessage(__FILE__, __LINE__, google::INFO, counter, \
+  google::LogMessage(__FILE__, __LINE__, google::GLOG_INFO, counter, \
   &google::LogMessage::SendToSyslogAndLog)
 #define GOOGLE_LOG_WARNING(counter)  \
-  google::LogMessage(__FILE__, __LINE__, google::WARNING, counter, \
+  google::LogMessage(__FILE__, __LINE__, google::GLOG_WARNING, counter, \
   &google::LogMessage::SendToLog)
 #define SYSLOG_WARNING(counter)  \
-  google::LogMessage(__FILE__, __LINE__, google::WARNING, counter, \
+  google::LogMessage(__FILE__, __LINE__, google::GLOG_WARNING, counter, \
   &google::LogMessage::SendToSyslogAndLog)
 #define GOOGLE_LOG_ERROR(counter)  \
-  google::LogMessage(__FILE__, __LINE__, google::ERROR, counter, \
+  google::LogMessage(__FILE__, __LINE__, google::GLOG_ERROR, counter, \
   &google::LogMessage::SendToLog)
 #define SYSLOG_ERROR(counter)  \
-  google::LogMessage(__FILE__, __LINE__, google::ERROR, counter, \
+  google::LogMessage(__FILE__, __LINE__, google::GLOG_ERROR, counter, \
   &google::LogMessage::SendToSyslogAndLog)
 #define GOOGLE_LOG_FATAL(counter) \
-  google::LogMessage(__FILE__, __LINE__, google::FATAL, counter, \
+  google::LogMessage(__FILE__, __LINE__, google::GLOG_FATAL, counter, \
   &google::LogMessage::SendToLog)
 #define SYSLOG_FATAL(counter) \
-  google::LogMessage(__FILE__, __LINE__, google::FATAL, counter, \
+  google::LogMessage(__FILE__, __LINE__, google::GLOG_FATAL, counter, \
   &google::LogMessage::SendToSyslogAndLog)
 #define GOOGLE_LOG_DFATAL(counter) \
   google::LogMessage(__FILE__, __LINE__, google::DFATAL_LEVEL, counter, \
@@ -458,7 +458,7 @@ DECLARE_bool(stop_logging_if_full_disk);
                          FORMAT_MESSAGE_FROM_SYSTEM, \
                          0, result, 0, msg, 100, NULL); \
     if (message_length > 0) { \
-      google::LogMessage(__FILE__, __LINE__, ERROR, 0, \
+      google::LogMessage(__FILE__, __LINE__, google::GLOG_ERROR, 0, \
           &google::LogMessage::SendToLog).stream() << message; \
       LocalFree(message); \
     } \
@@ -505,12 +505,12 @@ class LogSink;  // defined below
 #define LOG_TO_SINK(sink, severity) \
   google::LogMessage(                                    \
       __FILE__, __LINE__,                                               \
-      google::severity,                                  \
+      google::GLOG_ ## severity,                         \
       static_cast<google::LogSink*>(sink), true).stream()
 #define LOG_TO_SINK_BUT_NOT_TO_LOGFILE(sink, severity)                  \
   google::LogMessage(                                    \
       __FILE__, __LINE__,                                               \
-      google::severity,                                  \
+      google::GLOG_ ## severity,                         \
       static_cast<google::LogSink*>(sink), false).stream()
 
 // If a non-NULL string pointer is given, we write this message to that string.
@@ -775,7 +775,7 @@ DECLARE_CHECK_STROP_IMPL(strcasecmp, false)
 
 #define GOOGLE_PLOG(severity, counter)  \
   google::ErrnoLogMessage( \
-      __FILE__, __LINE__, google::severity, counter, \
+      __FILE__, __LINE__, google::GLOG_ ## severity, counter, \
       &google::LogMessage::SendToLog)
 
 #define PLOG_IF(severity, condition) \
@@ -814,7 +814,7 @@ PLOG_IF(FATAL, GOOGLE_PREDICT_BRANCH_NOT_TAKEN((invocation) == -1))    \
   if (++LOG_OCCURRENCES_MOD_N > n) LOG_OCCURRENCES_MOD_N -= n; \
   if (LOG_OCCURRENCES_MOD_N == 1) \
     google::LogMessage( \
-        __FILE__, __LINE__, google::severity, LOG_OCCURRENCES, \
+        __FILE__, __LINE__, google::GLOG_ ## severity, LOG_OCCURRENCES, \
         &what_to_do).stream()
 
 #define SOME_KIND_OF_LOG_IF_EVERY_N(severity, condition, n, what_to_do) \
@@ -823,7 +823,7 @@ PLOG_IF(FATAL, GOOGLE_PREDICT_BRANCH_NOT_TAKEN((invocation) == -1))    \
   if (condition && \
       ((LOG_OCCURRENCES_MOD_N=(LOG_OCCURRENCES_MOD_N + 1) % n) == (1 % n))) \
     google::LogMessage( \
-        __FILE__, __LINE__, google::severity, LOG_OCCURRENCES, \
+        __FILE__, __LINE__, google::GLOG_ ## severity, LOG_OCCURRENCES, \
                  &what_to_do).stream()
 
 #define SOME_KIND_OF_PLOG_EVERY_N(severity, n, what_to_do) \
@@ -832,7 +832,7 @@ PLOG_IF(FATAL, GOOGLE_PREDICT_BRANCH_NOT_TAKEN((invocation) == -1))    \
   if (++LOG_OCCURRENCES_MOD_N > n) LOG_OCCURRENCES_MOD_N -= n; \
   if (LOG_OCCURRENCES_MOD_N == 1) \
     google::ErrnoLogMessage( \
-        __FILE__, __LINE__, google::severity, LOG_OCCURRENCES, \
+        __FILE__, __LINE__, google::GLOG_ ## severity, LOG_OCCURRENCES, \
         &what_to_do).stream()
 
 #define SOME_KIND_OF_LOG_FIRST_N(severity, n, what_to_do) \
@@ -841,7 +841,7 @@ PLOG_IF(FATAL, GOOGLE_PREDICT_BRANCH_NOT_TAKEN((invocation) == -1))    \
     ++LOG_OCCURRENCES; \
   if (LOG_OCCURRENCES <= n) \
     google::LogMessage( \
-        __FILE__, __LINE__, google::severity, LOG_OCCURRENCES, \
+        __FILE__, __LINE__, google::GLOG_ ## severity, LOG_OCCURRENCES, \
         &what_to_do).stream()
 
 namespace glog_internal_namespace_ {
@@ -855,7 +855,7 @@ struct CrashReason;
   typedef google::glog_internal_namespace_::CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
 
 #define LOG_EVERY_N(severity, n)                                        \
-  GOOGLE_GLOG_COMPILE_ASSERT(google::severity <          \
+  GOOGLE_GLOG_COMPILE_ASSERT(google::GLOG_ ## severity < \
                              google::NUM_SEVERITIES,     \
                              INVALID_REQUESTED_LOG_SEVERITY);           \
   SOME_KIND_OF_LOG_EVERY_N(severity, (n), google::LogMessage::SendToLog)
@@ -875,6 +875,27 @@ struct CrashReason;
 // We want the special COUNTER value available for LOG_EVERY_X()'ed messages
 enum PRIVATE_Counter {COUNTER};
 
+#ifdef GLOG_NO_ABBREVIATED_SEVERITIES
+// wingdi.h defines ERROR to be 0. When we call LOG(ERROR), it gets
+// substituted with 0, and it expands to COMPACT_GOOGLE_LOG_0. To allow us
+// to keep using this syntax, we define this macro to do the same thing
+// as COMPACT_GOOGLE_LOG_ERROR.
+#define COMPACT_GOOGLE_LOG_0 COMPACT_GOOGLE_LOG_ERROR
+#define SYSLOG_0 SYSLOG_ERROR
+#define LOG_TO_STRING_0 LOG_TO_STRING_ERROR
+// Needed for LOG_IS_ON(ERROR).
+const LogSeverity GLOG_0 = GLOG_ERROR;
+#else
+// Users may include windows.h after logging.h without
+// GLOG_NO_ABBREVIATED_SEVERITIES nor WIN32_LEAN_AND_MEAN.
+// For this case, we cannot detect if ERROR is defined before users
+// actually use ERROR. Let's make an undefined symbol to warn users.
+# define GLOG_ERROR_MSG ERROR_macro_is_defined_Define_GLOG_NO_ABBREVIATED_SEVERITIES_before_including_logging_h_See_the_document_for_detail
+# define COMPACT_GOOGLE_LOG_0 GLOG_ERROR_MSG
+# define SYSLOG_0 GLOG_ERROR_MSG
+# define LOG_TO_STRING_0 GLOG_ERROR_MSG
+# define GLOG_0 GLOG_ERROR_MSG
+#endif
 
 // Plus some debug-logging macros that get compiled to nothing for production
 
diff --git a/src/windows/glog/raw_logging.h b/src/windows/glog/raw_logging.h
index e14fb41..4757a71 100755
--- a/src/windows/glog/raw_logging.h
+++ b/src/windows/glog/raw_logging.h
@@ -72,7 +72,7 @@ namespace google {
 //   I0821 211317 file.cc:142] RAW: status is 20
 #define RAW_LOG(severity, ...) \
   do { \
-    switch (google::severity) {  \
+    switch (google::GLOG_ ## severity) {  \
       case 0: \
         RAW_LOG_INFO(__VA_ARGS__); \
         break; \
@@ -104,28 +104,28 @@ namespace google {
 #endif // STRIP_LOG == 0
 
 #if STRIP_LOG == 0
-#define RAW_LOG_INFO(...) google::RawLog__(google::INFO, \
+#define RAW_LOG_INFO(...) google::RawLog__(google::GLOG_INFO, \
                                    __FILE__, __LINE__, __VA_ARGS__)
 #else
 #define RAW_LOG_INFO(...) google::RawLogStub__(0, __VA_ARGS__)
 #endif // STRIP_LOG == 0
 
 #if STRIP_LOG <= 1
-#define RAW_LOG_WARNING(...) google::RawLog__(google::WARNING,   \
+#define RAW_LOG_WARNING(...) google::RawLog__(google::GLOG_WARNING,   \
                                       __FILE__, __LINE__, __VA_ARGS__)
 #else
 #define RAW_LOG_WARNING(...) google::RawLogStub__(0, __VA_ARGS__)
 #endif // STRIP_LOG <= 1
 
 #if STRIP_LOG <= 2
-#define RAW_LOG_ERROR(...) google::RawLog__(google::ERROR,       \
+#define RAW_LOG_ERROR(...) google::RawLog__(google::GLOG_ERROR,       \
                                     __FILE__, __LINE__, __VA_ARGS__)
 #else
 #define RAW_LOG_ERROR(...) google::RawLogStub__(0, __VA_ARGS__)
 #endif // STRIP_LOG <= 2
 
 #if STRIP_LOG <= 3
-#define RAW_LOG_FATAL(...) google::RawLog__(google::FATAL,       \
+#define RAW_LOG_FATAL(...) google::RawLog__(google::GLOG_FATAL,       \
                                     __FILE__, __LINE__, __VA_ARGS__)
 #else
 #define RAW_LOG_FATAL(...) \