/*

 * Copyright (c) 2018, 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 "memory/metaspace/metaspaceCommon.hpp"

#include "memory/metaspace/virtualSpaceNode.hpp"

#include "utilities/debug.hpp"

#include "utilities/globalDefinitions.hpp"

#include "utilities/ostream.hpp"

namespace metaspace {

// Print a size, in words, scaled.

void print_scaled_words(outputStream* st, size_t word_size, size_t scale, int width) {

  print_human_readable_size(st, word_size * sizeof(MetaWord), scale, width);

}

// Convenience helper: prints a size value and a percentage.

void print_scaled_words_and_percentage(outputStream* st, size_t word_size, size_t compare_word_size, size_t scale, int width) {

  print_scaled_words(st, word_size, scale, width);

  st->print(" (");

  print_percentage(st, compare_word_size, word_size);

  st->print(")");

}

// Print a human readable size.

// byte_size: size, in bytes, to be printed.

// scale: one of 1 (byte-wise printing), sizeof(word) (word-size printing), K, M, G (scaled by KB, MB, GB respectively,

//         or 0, which means the best scale is choosen dynamically.

// width: printing width.

void print_human_readable_size(outputStream* st, size_t byte_size, size_t scale, int width)  {

  if (scale == 0) {

    // Dynamic mode. Choose scale for this value.

    if (byte_size == 0) {

      // Zero values are printed as bytes.

      scale = 1;

    } else {

      if (byte_size >= G) {

        scale = G;

      } else if (byte_size >= M) {

        scale = M;

      } else if (byte_size >= K) {

        scale = K;

      } else {

        scale = 1;

      }

    }

    return print_human_readable_size(st, byte_size, scale, width);

  }

#ifdef ASSERT

  // Special case: printing wordsize should only be done with word-sized values

  if (scale == BytesPerWord) {

    assert(byte_size % BytesPerWord == 0, "not word sized");

  }

#endif

  } else {

    } else {

    }

  }

}

// Prints a percentage value. Values smaller than 1% but not 0 are displayed as "<1%", values

// larger than 99% but not 100% are displayed as ">100%".

void print_percentage(outputStream* st, size_t total, size_t part) {

  if (total == 0) {

    st->print("  ?%%");

  } else if (part == 0) {

    st->print("  0%%");

  } else if (part == total) {

    st->print("100%%");

  } else {

    // Note: clearly print very-small-but-not-0% and very-large-but-not-100% percentages.

    float p = ((float)part / total) * 100.0f;

    if (p < 1.0f) {

      st->print(" <1%%");

    } else if (p > 99.0f){

      st->print(">99%%");

    } else {

      st->print("%3.0f%%", p);

    }

  }

}

const char* loaders_plural(uintx num) {

  return num == 1 ? "loader" : "loaders";

}

const char* classes_plural(uintx num) {

  return num == 1 ? "class" : "classes";

}

void print_number_of_classes(outputStream* out, uintx classes, uintx classes_shared) {

  out->print(UINTX_FORMAT " %s", classes, classes_plural(classes));

  if (classes_shared > 0) {

    out->print(" (" UINTX_FORMAT " shared)", classes_shared);

  }

}

} // namespace metaspace