/*

 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#include "utilities/globalDefinitions.hpp"

class outputStream;

// The list of available decorators:

// time         - Current time and date in ISO-8601 format

// uptime       - Time since the start of the JVM in seconds and milliseconds (e.g., 6.567s)

// timemillis   - The same value as generated by System.currentTimeMillis()

// uptimemillis - Milliseconds since the JVM started

// timenanos    - The same value as generated by System.nanoTime()

// uptimenanos  - Nanoseconds since the JVM started

// hostname     - The hostname

// pid          - The process identifier

// tid          - The thread identifier

// level        - The level associated with the log message

// tags         - The tag-set associated with the log message

#define DECORATOR_LIST          \

  DECORATOR(time,         t)    \

  DECORATOR(utctime,      utc)  \

  DECORATOR(uptime,       u)    \

  DECORATOR(timemillis,   tm)   \

  DECORATOR(uptimemillis, um)   \

  DECORATOR(timenanos,    tn)   \

  DECORATOR(uptimenanos,  un)   \

  DECORATOR(hostname,     hn)   \

  DECORATOR(pid,          p)    \

  DECORATOR(tid,          ti)   \

  DECORATOR(level,        l)    \

  DECORATOR(tags,         tg)

// LogDecorators represents a selection of decorators that should be prepended to

// each log message for a given output. Decorators are always prepended in the order

// declared above. For example, logging with 'uptime, level, tags' decorators results in:

// [0,943s][info   ][logging] message.

class LogDecorators {

 public:

  enum Decorator {

#define DECORATOR(name, abbr) name##_decorator,

    DECORATOR_LIST

#undef DECORATOR

    Count,

    Invalid

  };

 private:

  uint _decorators;

  static const char* _name[][2];

  static const uint DefaultDecoratorsMask = (1 << uptime_decorator) | (1 << level_decorator) | (1 << tags_decorator);

  static uint mask(LogDecorators::Decorator decorator) {

    return 1 << decorator;

  }

  LogDecorators(uint mask) : _decorators(mask) {

  }

 public:

  static const LogDecorators None;

  LogDecorators() : _decorators(DefaultDecoratorsMask) {

  };

  void clear() {

    _decorators = 0;

  }

  static const char* name(LogDecorators::Decorator decorator) {

    return _name[decorator][0];

  }

  static const char* abbreviation(LogDecorators::Decorator decorator) {

    return _name[decorator][1];

  }

  static LogDecorators::Decorator from_string(const char* str);

  void combine_with(const LogDecorators &source) {

    _decorators |= source._decorators;

  }

  bool is_empty() const {

    return _decorators == 0;

  }

  bool is_decorator(LogDecorators::Decorator decorator) const {

    return (_decorators & mask(decorator)) != 0;

  }

  bool parse(const char* decorator_args, outputStream* errstream = NULL);

};