1 files changed, 109 insertions, 0 deletions
diff --git a/src/third_party/re2/dist/util/logging.h b/src/third_party/re2/dist/util/logging.h
new file mode 100644
index 00000000000..5b2217f29ca
--- /dev/null
+++ b/src/third_party/re2/dist/util/logging.h
@@ -0,0 +1,109 @@
+// 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.
+
+#ifndef UTIL_LOGGING_H_
+#define UTIL_LOGGING_H_
+
+// Simplified version of Google's logging.
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ostream>
+#include <sstream>
+
+#include "util/util.h"
+
+// 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_WARNING LogMessage(__FILE__, __LINE__)
+#define LOG_ERROR LogMessage(__FILE__, __LINE__)
+#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 LOG_DFATAL LOG_ERROR
+#else
+#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) {
+    stream() << file << ":" << line << ": ";
+  }
+  void Flush() {
+    stream() << "\n";
+    std::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();
+    }
+  }
+  std::ostream& stream() { return str_; }
+
+ private:
+  bool flushed_;
+  std::ostringstream str_;
+
+  LogMessage(const LogMessage&) = delete;
+  LogMessage& operator=(const LogMessage&) = delete;
+};
+
+// Silence "destructor never returns" warning for ~LogMessageFatal().
+// Since this is a header file, push and then pop to limit the scope.
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4722)
+#endif
+
+class LogMessageFatal : public LogMessage {
+ public:
+  LogMessageFatal(const char* file, int line)
+      : LogMessage(file, line) {}
+  ATTRIBUTE_NORETURN ~LogMessageFatal() {
+    Flush();
+    abort();
+  }
+ private:
+  LogMessageFatal(const LogMessageFatal&) = delete;
+  LogMessageFatal& operator=(const LogMessageFatal&) = delete;
+};
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+#endif  // UTIL_LOGGING_H_