/*

 * Copyright (c) 2015, 2017, 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 "precompiled.hpp"

#include "jvm.h"

#include "logging/logDecorators.hpp"

#include "logging/logDecorations.hpp"

#include "logging/logFileStreamOutput.hpp"

#include "logging/logMessageBuffer.hpp"

#include "memory/allocation.inline.hpp"

static bool initialized;

static union {

  char stdoutmem[sizeof(LogStdoutOutput)];

  jlong dummy;

} aligned_stdoutmem;

static union {

  char stderrmem[sizeof(LogStderrOutput)];

  jlong dummy;

} aligned_stderrmem;

LogStdoutOutput &StdoutLog = reinterpret_cast<LogStdoutOutput&>(aligned_stdoutmem.stdoutmem);

LogStderrOutput &StderrLog = reinterpret_cast<LogStderrOutput&>(aligned_stderrmem.stderrmem);

LogFileStreamInitializer::LogFileStreamInitializer() {

  if (!initialized) {

    ::new (&StdoutLog) LogStdoutOutput();

    ::new (&StderrLog) LogStderrOutput();

    initialized = true;

  }

}

int LogFileStreamOutput::write_decorations(const LogDecorations& decorations) {

  int total_written = 0;

  for (uint i = 0; i < LogDecorators::Count; i++) {

    LogDecorators::Decorator decorator = static_cast<LogDecorators::Decorator>(i);

    if (!_decorators.is_decorator(decorator)) {

      continue;

    }

    int written = jio_fprintf(_stream, "[%-*s]",

                              _decorator_padding[decorator],

                              decorations.decoration(decorator));

    if (written <= 0) {

      return -1;

    } else if (static_cast<size_t>(written - 2) > _decorator_padding[decorator]) {

      _decorator_padding[decorator] = written - 2;

    }

    total_written += written;

  }

  return total_written;

}

int LogFileStreamOutput::write(const LogDecorations& decorations, const char* msg) {

  const bool use_decorations = !_decorators.is_empty();

  int written = 0;

  os::flockfile(_stream);

  if (use_decorations) {

    written += write_decorations(decorations);

    written += jio_fprintf(_stream, " ");

  }

  written += jio_fprintf(_stream, "%s\n", msg);

  fflush(_stream);

  os::funlockfile(_stream);

  return written;

}

int LogFileStreamOutput::write(LogMessageBuffer::Iterator msg_iterator) {

  const bool use_decorations = !_decorators.is_empty();

  int written = 0;

  os::flockfile(_stream);

  for (; !msg_iterator.is_at_end(); msg_iterator++) {

    if (use_decorations) {

      written += write_decorations(msg_iterator.decorations());

      written += jio_fprintf(_stream, " ");

    }

    written += jio_fprintf(_stream, "%s\n", msg_iterator.message());

  }

  fflush(_stream);

  os::funlockfile(_stream);

  return written;

}