Update re2

third_party/re2/util/logging.h

 // 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.
 
 // Simplified version of Google's logging.
 
 #ifndef RE2_UTIL_LOGGING_H__
 #define RE2_UTIL_LOGGING_H__
 
-#ifndef WIN32
-#include <unistd.h>  /* for write */
-#endif
+#include <stdio.h>  /* for fwrite */
 #include <sstream>
-#ifdef WIN32
-#include <io.h>
-#endif
+
+#include "util/util.h"
+#include "util/flags.h"
+
+DECLARE_int32(minloglevel);
 
 // 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_ERROR LOG_INFO
-#define LOG_WARNING LOG_INFO
+#define LOG_INFO LogMessage(__FILE__, __LINE__, 0)
+#define LOG_WARNING LogMessage(__FILE__, __LINE__, 1)
+#define LOG_ERROR LogMessage(__FILE__, __LINE__, 2)
 #define LOG_FATAL LogMessageFatal(__FILE__, __LINE__)
 #define LOG_QFATAL LOG_FATAL
 
-#define VLOG(x) if((x)>0){}else LOG_INFO.stream()
+// It seems that one of the Windows header files defines ERROR as 0.
+#ifdef _WIN32
+#define LOG_0 LOG_INFO
+#endif
 
 #ifdef NDEBUG
 #define DEBUG_MODE 0
 #define LOG_DFATAL LOG_ERROR
 #else
 #define DEBUG_MODE 1
 #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) {
+  LogMessage(const char* file, int line, int severity)
+      : severity_(severity), flushed_(false) {
     stream() << file << ":" << line << ": ";
   }
   void Flush() {
     stream() << "\n";
-    string s = str_.str();
-    int n = (int)s.size(); // shut up msvc
-    if(write(2, s.data(), n) < 0) {}  // shut up gcc
+    if (severity_ >= re2::FLAGS_minloglevel) {
+      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();
     }
   }
   ostream& stream() { return str_; }
- 
+
  private:
+  const int severity_;
   bool flushed_;
   std::ostringstream str_;
-  DISALLOW_EVIL_CONSTRUCTORS(LogMessage);
+  DISALLOW_COPY_AND_ASSIGN(LogMessage);
 };
 
+#ifdef _WIN32
+#pragma warning(push)
+#pragma warning(disable: 4722) // destructor never returns
+#endif
+
 class LogMessageFatal : public LogMessage {
  public:
   LogMessageFatal(const char* file, int line)
-    : LogMessage(file, line) { }
+      : LogMessage(file, line, 3) {}
   ~LogMessageFatal() {
     Flush();
     abort();
   }
  private:
-  DISALLOW_EVIL_CONSTRUCTORS(LogMessageFatal);
+  DISALLOW_COPY_AND_ASSIGN(LogMessageFatal);
 };
 
+#ifdef _WIN32
+#pragma warning(pop)
+#endif
+
 #endif  // RE2_UTIL_LOGGING_H__