// 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 <google/protobuf/stubs/status.h>

#include <google/protobuf/stubs/stringpiece.h>

#include <google/protobuf/port_def.inc>

// ===================================================================

// emulates google3/base/logging.h

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 uint128;

namespace internal {

class LogFinisher;

class PROTOBUF_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 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 PROTOBUF_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 == nullptr) {

    GOOGLE_LOG(FATAL) << name;

  }

  return val;

}

}  // namespace internal

#define GOOGLE_CHECK_NOTNULL(A)               \

  ::google::protobuf::internal::CheckNotNull( \

      __FILE__, __LINE__, "'" #A "' must not be nullptr", (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 nullptr 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.

PROTOBUF_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 PROTOBUF_EXPORT LogSilencer {

 public:

  LogSilencer();

  ~LogSilencer();

};

}  // namespace protobuf

}  // namespace google

#include <google/protobuf/port_undef.inc>

#endif  // GOOGLE_PROTOBUF_STUBS_LOGGING_H_