sparse-sort.cc

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/*

Copyright (C) 2004-2018 David Bateman
Copyright (C) 1998-2004 Andy Adler

This file is part of Octave.

Octave 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 3 of the License, or
(at your option) any later version.

Octave 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 Octave; see the file COPYING.  If not, see
<https://www.gnu.org/licenses/>.

*/

#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include <cassert>
#include <cstring>

#include "oct-sort.cc"
#include "quit.h"

#include "sparse-sort.h"

// A simple class and instantiation of the octave merge sort class
// to sort sparse data before matrix creation.  This is significantly
// faster than using octave_qsort.

bool
octave_sparse_sidxl_comp (octave_sparse_sort_idxl *i,
                          octave_sparse_sort_idxl *j)
{
  octave_idx_type tmp = i->c - j->c;
  if (tmp < 0)
    return true;
  else if (tmp > 0)
    return false;
  return  (i->r < j->r);
}

template class octave_sort<octave_sparse_sort_idxl *>;

// Need to know the original order of the sorted indexes in
// sparse assignments, and this class does that
bool
octave_idx_vector_comp (octave_idx_vector_sort *i,
                        octave_idx_vector_sort *j)
{
  return (i->i < j->i);
}

template class octave_sort<octave_idx_vector_sort *>;