Replace RE2 import with a dependency

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__
-
-#include <stdio.h>  /* for fwrite */
-#include <sstream>
-
-#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__, 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
-
-// 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, int severity)
-      : severity_(severity), flushed_(false) {
-    stream() << file << ":" << line << ": ";
-  }
-  void Flush() {
-    stream() << "\n";
-    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_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, 3) {}
-  ~LogMessageFatal() {
-    Flush();
-    abort();
-  }
- private:
-  DISALLOW_COPY_AND_ASSIGN(LogMessageFatal);
-};
-
-#ifdef _WIN32
-#pragma warning(pop)
-#endif
-
-#endif  // RE2_UTIL_LOGGING_H__