/*

 * Copyright (c) 2001, 2012, 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 "utilities/intHisto.hpp"

IntHistogram::IntHistogram(int est, int max) : _max(max), _tot(0) {

  assert(0 <= est && est <= max, "Preconditions");

  _elements = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<int>(est, true);

  guarantee(_elements != NULL, "alloc failure");

}

void IntHistogram::add_entry(int outcome) {

  if (outcome > _max) outcome = _max;

  int new_count = _elements->at_grow(outcome) + 1;

  _elements->at_put(outcome, new_count);

  _tot++;

}

int IntHistogram::entries_for_outcome(int outcome) {

  return _elements->at_grow(outcome);

}

void IntHistogram::print_on(outputStream* st) const {

  double tot_d = (double)_tot;

  st->print_cr("Outcome     # of occurrences   %% of occurrences");

  st->print_cr("-----------------------------------------------");

  for (int i=0; i < _elements->length()-2; i++) {

    int cnt = _elements->at(i);

    if (cnt != 0) {

      st->print_cr("%7d        %10d         %8.4f",

                   i, cnt, (double)cnt/tot_d);

    }

  }

  // Does it have any max entries?

  if (_elements->length()-1 == _max) {

    int cnt = _elements->at(_max);

    st->print_cr(">= %4d        %10d         %8.4f",

                 _max, cnt, (double)cnt/tot_d);

  }

  st->print_cr("-----------------------------------------------");

  st->print_cr("    All        %10d         %8.4f", _tot, 1.0);

}