text: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #ifndef GOOGLE_PROTOBUF_STUBS_LOGGING_H_
  #define GOOGLE_PROTOBUF_STUBS_LOGGING_H_
  
  #include <google/protobuf/stubs/macros.h>
  #include <google/protobuf/stubs/port.h>
  
  #include "thirdparty/glog/logging.h"
  
  #define GOOGLE_LOG          LOG
  #define GOOGLE_LOG_IF       LOG_IF
  
  #define GOOGLE_CHECK        CHECK
  #define GOOGLE_CHECK_EQ     CHECK_EQ
  #define GOOGLE_CHECK_NE     CHECK_NE
  #define GOOGLE_CHECK_LT     CHECK_LT
  #define GOOGLE_CHECK_LE     CHECK_LE
  #define GOOGLE_CHECK_GT     CHECK_GT
  #define GOOGLE_CHECK_GE     CHECK_GE
  #define GOOGLE_CHECK_NOTNULL     CHECK_NOTNULL
  
  #define GOOGLE_DLOG         DLOG
  #define GOOGLE_DCHECK       DCHECK
  #define GOOGLE_DCHECK_EQ    DCHECK_EQ
  #define GOOGLE_DCHECK_NE    DCHECK_NE
  #define GOOGLE_DCHECK_LT    DCHECK_LT
  #define GOOGLE_DCHECK_LE    DCHECK_LE
  #define GOOGLE_DCHECK_GT    DCHECK_GT
  #define GOOGLE_DCHECK_GE    DCHECK_GE
  
  // ===================================================================
  // emulates google3/base/logging.h
  
  #if 0
  namespace google {
  namespace protobuf {
  
  enum LogLevel {
    LOGLEVEL_INFO,     // Informational.  This is never actually used by
                       // libprotobuf.
    LOGLEVEL_WARNING,  // Warns about issues that, although not technically a
                       // problem now, could cause problems in the future.  For
                       // example, a // warning will be printed when parsing a
                       // message that is near the message size limit.
    LOGLEVEL_ERROR,    // An error occurred which should never happen during
                       // normal use.
    LOGLEVEL_FATAL,    // An error occurred from which the library cannot
                       // recover.  This usually indicates a programming error
                       // in the code which calls the library, especially when
                       // compiled in debug mode.
  
  #ifdef NDEBUG
    LOGLEVEL_DFATAL = LOGLEVEL_ERROR
  #else
    LOGLEVEL_DFATAL = LOGLEVEL_FATAL
  #endif
  };
  
  class StringPiece;
  namespace util {
  class Status;
  }
  class uint128;
  namespace internal {
  
  class LogFinisher;
  
  class LIBPROTOBUF_EXPORT LogMessage {
   public:
    LogMessage(LogLevel level, const char* filename, int line);
    ~LogMessage();
  
    LogMessage& operator<<(const std::string& value);
    LogMessage& operator<<(const char* value);
    LogMessage& operator<<(char value);
    LogMessage& operator<<(int value);
    LogMessage& operator<<(uint value);
    LogMessage& operator<<(long value);
    LogMessage& operator<<(unsigned long value);
    LogMessage& operator<<(long long value);
    LogMessage& operator<<(unsigned long long value);
    LogMessage& operator<<(double value);
    LogMessage& operator<<(void* value);
    LogMessage& operator<<(const StringPiece& value);
    LogMessage& operator<<(const ::google::protobuf::util::Status& status);
    LogMessage& operator<<(const uint128& value);
  
   private:
    friend class LogFinisher;
    void Finish();
  
    LogLevel level_;
    const char* filename_;
    int line_;
    std::string message_;
  };
  
  // Used to make the entire "LOG(BLAH) << etc." expression have a void return
  // type and print a newline after each message.
  class LIBPROTOBUF_EXPORT LogFinisher {
   public:
    void operator=(LogMessage& other);
  };
  
  template<typename T>
  bool IsOk(T status) { return status.ok(); }
  template<>
  inline bool IsOk(bool status) { return status; }
  
  }  // namespace internal
  
  // Undef everything in case we're being mixed with some other Google library
  // which already defined them itself.  Presumably all Google libraries will
  // support the same syntax for these so it should not be a big deal if they
  // end up using our definitions instead.
  #undef GOOGLE_LOG
  #undef GOOGLE_LOG_IF
  
  #undef GOOGLE_CHECK
  #undef GOOGLE_CHECK_OK
  #undef GOOGLE_CHECK_EQ
  #undef GOOGLE_CHECK_NE
  #undef GOOGLE_CHECK_LT
  #undef GOOGLE_CHECK_LE
  #undef GOOGLE_CHECK_GT
  #undef GOOGLE_CHECK_GE
  #undef GOOGLE_CHECK_NOTNULL
  
  #undef GOOGLE_DLOG
  #undef GOOGLE_DCHECK
  #undef GOOGLE_DCHECK_OK
  #undef GOOGLE_DCHECK_EQ
  #undef GOOGLE_DCHECK_NE
  #undef GOOGLE_DCHECK_LT
  #undef GOOGLE_DCHECK_LE
  #undef GOOGLE_DCHECK_GT
  #undef GOOGLE_DCHECK_GE
  
  #define GOOGLE_LOG(LEVEL)                                                 \
    ::google::protobuf::internal::LogFinisher() =                           \
      ::google::protobuf::internal::LogMessage(                             \
        ::google::protobuf::LOGLEVEL_##LEVEL, __FILE__, __LINE__)
  #define GOOGLE_LOG_IF(LEVEL, CONDITION) \
    !(CONDITION) ? (void)0 : GOOGLE_LOG(LEVEL)
  
  #define GOOGLE_CHECK(EXPRESSION) \
    GOOGLE_LOG_IF(FATAL, !(EXPRESSION)) << "CHECK failed: " #EXPRESSION ": "
  #define GOOGLE_CHECK_OK(A) GOOGLE_CHECK(::google::protobuf::internal::IsOk(A))
  #define GOOGLE_CHECK_EQ(A, B) GOOGLE_CHECK((A) == (B))
  #define GOOGLE_CHECK_NE(A, B) GOOGLE_CHECK((A) != (B))
  #define GOOGLE_CHECK_LT(A, B) GOOGLE_CHECK((A) <  (B))
  #define GOOGLE_CHECK_LE(A, B) GOOGLE_CHECK((A) <= (B))
  #define GOOGLE_CHECK_GT(A, B) GOOGLE_CHECK((A) >  (B))
  #define GOOGLE_CHECK_GE(A, B) GOOGLE_CHECK((A) >= (B))
  
  namespace internal {
  template<typename T>
  T* CheckNotNull(const char* /* file */, int /* line */,
                  const char* name, T* val) {
    if (val == NULL) {
      GOOGLE_LOG(FATAL) << name;
    }
    return val;
  }
  }  // namespace internal
  #define GOOGLE_CHECK_NOTNULL(A) \
    ::google::protobuf::internal::CheckNotNull(\
        __FILE__, __LINE__, "'" #A "' must not be NULL", (A))
  
  #ifdef NDEBUG
  
  #define GOOGLE_DLOG(LEVEL) GOOGLE_LOG_IF(LEVEL, false)
  
  #define GOOGLE_DCHECK(EXPRESSION) while(false) GOOGLE_CHECK(EXPRESSION)
  #define GOOGLE_DCHECK_OK(E) GOOGLE_DCHECK(::google::protobuf::internal::IsOk(E))
  #define GOOGLE_DCHECK_EQ(A, B) GOOGLE_DCHECK((A) == (B))
  #define GOOGLE_DCHECK_NE(A, B) GOOGLE_DCHECK((A) != (B))
  #define GOOGLE_DCHECK_LT(A, B) GOOGLE_DCHECK((A) <  (B))
  #define GOOGLE_DCHECK_LE(A, B) GOOGLE_DCHECK((A) <= (B))
  #define GOOGLE_DCHECK_GT(A, B) GOOGLE_DCHECK((A) >  (B))
  #define GOOGLE_DCHECK_GE(A, B) GOOGLE_DCHECK((A) >= (B))
  
  #else  // NDEBUG
  
  #define GOOGLE_DLOG GOOGLE_LOG
  
  #define GOOGLE_DCHECK    GOOGLE_CHECK
  #define GOOGLE_DCHECK_OK GOOGLE_CHECK_OK
  #define GOOGLE_DCHECK_EQ GOOGLE_CHECK_EQ
  #define GOOGLE_DCHECK_NE GOOGLE_CHECK_NE
  #define GOOGLE_DCHECK_LT GOOGLE_CHECK_LT
  #define GOOGLE_DCHECK_LE GOOGLE_CHECK_LE
  #define GOOGLE_DCHECK_GT GOOGLE_CHECK_GT
  #define GOOGLE_DCHECK_GE GOOGLE_CHECK_GE
  
  #endif  // !NDEBUG
  
  typedef void LogHandler(LogLevel level, const char* filename, int line,
                          const std::string& message);
  
  // The protobuf library sometimes writes warning and error messages to
  // stderr.  These messages are primarily useful for developers, but may
  // also help end users figure out a problem.  If you would prefer that
  // these messages be sent somewhere other than stderr, call SetLogHandler()
  // to set your own handler.  This returns the old handler.  Set the handler
  // to NULL to ignore log messages (but see also LogSilencer, below).
  //
  // Obviously, SetLogHandler is not thread-safe.  You should only call it
  // at initialization time, and probably not from library code.  If you
  // simply want to suppress log messages temporarily (e.g. because you
  // have some code that tends to trigger them frequently and you know
  // the warnings are not important to you), use the LogSilencer class
  // below.
  LIBPROTOBUF_EXPORT LogHandler* SetLogHandler(LogHandler* new_func);
  
  // Create a LogSilencer if you want to temporarily suppress all log
  // messages.  As long as any LogSilencer objects exist, non-fatal
  // log messages will be discarded (the current LogHandler will *not*
  // be called).  Constructing a LogSilencer is thread-safe.  You may
  // accidentally suppress log messages occurring in another thread, but
  // since messages are generally for debugging purposes only, this isn't
  // a big deal.  If you want to intercept log messages, use SetLogHandler().
  class LIBPROTOBUF_EXPORT LogSilencer {
   public:
    LogSilencer();
    ~LogSilencer();
  };
  
  }  // namespace protobuf
  }  // namespace google
  #endif
  
  #endif  // GOOGLE_PROTOBUF_STUBS_LOGGING_H_
  