blender-archive/source/blender/blenlib/intern/sort_utils.c

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2013 Blender Foundation.
 * All rights reserved.
 */

/** \file
 * \ingroup bli
 *
 * Utility functions for sorting common types.
 */

#include "BLI_sort_utils.h" /* own include */

struct SortAnyByFloat {
  float sort_value;
};

struct SortAnyByInt {
  int sort_value;
};

struct SortAnyByPtr {
  const void *sort_value;
};

int BLI_sortutil_cmp_float(const void *a_, const void *b_)
{
  const struct SortAnyByFloat *a = a_;
  const struct SortAnyByFloat *b = b_;
  if (a->sort_value > b->sort_value) {
    return 1;
  }
  else if (a->sort_value < b->sort_value) {
    return -1;
  }
  else {
    return 0;
  }
}

int BLI_sortutil_cmp_float_reverse(const void *a_, const void *b_)
{
  const struct SortAnyByFloat *a = a_;
  const struct SortAnyByFloat *b = b_;
  if (a->sort_value < b->sort_value) {
    return 1;
  }
  else if (a->sort_value > b->sort_value) {
    return -1;
  }
  else {
    return 0;
  }
}

int BLI_sortutil_cmp_int(const void *a_, const void *b_)
{
  const struct SortAnyByInt *a = a_;
  const struct SortAnyByInt *b = b_;
  if (a->sort_value > b->sort_value) {
    return 1;
  }
  else if (a->sort_value < b->sort_value) {
    return -1;
  }
  else {
    return 0;
  }
}

int BLI_sortutil_cmp_int_reverse(const void *a_, const void *b_)
{
  const struct SortAnyByInt *a = a_;
  const struct SortAnyByInt *b = b_;
  if (a->sort_value < b->sort_value) {
    return 1;
  }
  else if (a->sort_value > b->sort_value) {
    return -1;
  }
  else {
    return 0;
  }
}

int BLI_sortutil_cmp_ptr(const void *a_, const void *b_)
{
  const struct SortAnyByPtr *a = a_;
  const struct SortAnyByPtr *b = b_;
  if (a->sort_value > b->sort_value) {
    return 1;
  }
  else if (a->sort_value < b->sort_value) {
    return -1;
  }
  else {
    return 0;
  }
}

int BLI_sortutil_cmp_ptr_reverse(const void *a_, const void *b_)
{
  const struct SortAnyByPtr *a = a_;
  const struct SortAnyByPtr *b = b_;
  if (a->sort_value < b->sort_value) {
    return 1;
  }
  else if (a->sort_value > b->sort_value) {
    return -1;
  }
  else {
    return 0;
  }
}