ls-utils.cc

Go to the documentation of this file.

////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2003-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// 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 "data-conv.h"
 
#include "ls-utils.h"
 
// MAX_VAL and MIN_VAL are assumed to have integral values even though
// they are stored in doubles.
 
save_type
get_save_type (double /* max_val */, double /* min_val */)
{
  save_type st = LS_DOUBLE;
 
  // Matlab doesn't seem to load the UINT32 type correctly, so let's
  // avoid it (and the other unsigned types, even though they may not
  // have the same problem.  And apparently, there are problems with
  // other smaller types as well.  If we avoid them all, then maybe we
  // will avoid problems.  Unfortunately, we won't be able to save
  // space...
 
  //  if (max_val < 256 && min_val > -1)
  //    st = LS_U_CHAR;
  //  else if (max_val < 65536 && min_val > -1)
  //    st = LS_U_SHORT;
  //  else if (max_val < 4294967295UL && min_val > -1)
  //    st = LS_U_INT;
  //  else if (max_val < 128 && min_val >= -128)
  //    st = LS_CHAR;
  //  else if (max_val < 32768 && min_val >= -32768)
  //    st = LS_SHORT;
  //  else if (max_val <= 2147483647L && min_val >= -2147483647L)
  //    st = LS_INT;
 
  return st;
}
 
save_type
get_save_type (float /* max_val */, float /* min_val */)
{
  save_type st = LS_FLOAT;
 
  // Matlab doesn't seem to load the UINT32 type correctly, so let's
  // avoid it (and the other unsigned types, even though they may not
  // have the same problem.  And apparently, there are problems with
  // other smaller types as well.  If we avoid them all, then maybe we
  // will avoid problems.  Unfortunately, we won't be able to save
  // space...
 
  //  if (max_val < 256 && min_val > -1)
  //    st = LS_U_CHAR;
  //  else if (max_val < 65536 && min_val > -1)
  //    st = LS_U_SHORT;
  //  else if (max_val < 4294967295UL && min_val > -1)
  //    st = LS_U_INT;
  //  else if (max_val < 128 && min_val >= -128)
  //    st = LS_CHAR;
  //  else if (max_val < 32768 && min_val >= -32768)
  //    st = LS_SHORT;
  //  else if (max_val <= 2147483647L && min_val >= -2147483647L)
  //    st = LS_INT;
 
  return st;
}