/*
 * Copyright (c) 2020, 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 "gc/shared/gcLogPrecious.hpp"
#include "logging/logStream.hpp"
#include "runtime/os.hpp"

stringStream* GCLogPrecious::_lines = NULL;

void GCLogPrecious::initialize() {
  _lines = new (ResourceObj::C_HEAP, mtGC) stringStream();
  // Setup pretty-print indentation
  _lines->inc();
}

// Log to both the remember buffer and UL
void GCLogPrecious::vwrite(LogTargetHandle log_handle, const char* format, va_list args) {
  // Pretty print into _lines
  _lines->indent();

  // Save the line without a CR
  const size_t start = _lines->size();
  _lines->vprint(format, args);
  const size_t end = _lines->size();

  // The line is then logged to UL, which adds its own CR
  if (end > start) {
    log_handle.print("%s", _lines->base() + start);
  }

  // Now add the CR
  _lines->cr();
}

const char* GCLogPrecious::lines() {
  if (_lines == NULL) {
    return NULL;
  }

  return _lines->base();
}