/*

Copyright (C) 1996, 1997 John W. Eaton

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 2, 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, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION)
#pragma implementation
#endif

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <iostream>

#include "mx-base.h"

#include "gripes.h"
#include "oct-obj.h"
#include "ops.h"
#include "ov-bool.h"
#include "ov-base.h"
#include "ov-base-scalar.h"
#include "ov-base-scalar.cc"
#include "ov-re-mat.h"
#include "ov-scalar.h"
#include "pr-output.h"

#include "ls-oct-ascii.h"
#include "ls-hdf5.h"

template class octave_base_scalar<bool>;

DEFINE_OCTAVE_ALLOCATOR (octave_bool);

DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_bool, "bool", "logical");

static octave_value *
default_numeric_conversion_function (const octave_value& a)
{
  CAST_CONV_ARG (const octave_bool&);

  return new octave_scalar (v.bool_value ());
}

type_conv_fcn
octave_bool::numeric_conversion_function (void) const
{
  return default_numeric_conversion_function;
}

static inline bool
valid_scalar_indices (const octave_value_list& args)
{
  int nargin = args.length ();

  for (int i = 0; i < nargin; i++)
    if (! args(i).valid_as_scalar_index ())
      return false;

  return true;
}

octave_value
octave_bool::do_index_op (const octave_value_list& idx, int resize_ok)
{
  octave_value retval;

  if (valid_scalar_indices (idx))
    retval = scalar;
  else
    {
      // XXX FIXME XXX -- this doesn't solve the problem of
      //
      //   a = 1; a([1,1], [1,1], [1,1])
      //
      // and similar constructions.  Hmm...

      // XXX FIXME XXX -- using this constructor avoids narrowing the
      // 1x1 matrix back to a scalar value.  Need a better solution
      // to this problem.

      octave_value tmp (new octave_matrix (matrix_value ()));

      retval = tmp.do_index_op (idx, resize_ok);
    }

  return retval;
}

octave_value
octave_bool::convert_to_str_internal (bool, bool) const
{
  char s[2];
  s[0] = static_cast<char> (scalar);
  s[1] = '\0';

  return octave_value (s);
}

bool 
octave_bool::save_ascii (std::ostream& os, bool& /* infnan_warned */,
			 bool /* strip_nan_and_inf */)
{
  double d = double_value ();

  octave_write_double (os, d);
  os << "\n";

  return true;
}

bool 
octave_bool::load_ascii (std::istream& is)
{
  scalar = (octave_read_double (is) != 0.);

  if (!is)
    {
      error ("load: failed to load scalar constant");
      return false;
    }

  return true;
}

bool 
octave_bool::save_binary (std::ostream& os, bool& /* save_as_floats */)
{
  char tmp = (scalar ? 1 : 0);
  os.write (X_CAST (char *, &tmp), 1);

  return true;
}

bool 
octave_bool::load_binary (std::istream& is, bool /* swap */,
			  oct_mach_info::float_format /* fmt */)
{
  char tmp;
  if (! is.read (X_CAST (char *, &tmp), 1))
    return false;
  scalar = (tmp ? 1 : 0);
  return true;
}

#if defined (HAVE_HDF5)
bool
octave_bool::save_hdf5 (hid_t loc_id, const char *name,
			bool /* save_as_floats */)
{
  hsize_t dimens[3];
  hid_t space_hid = -1, data_hid = -1;
  bool retval = true;

  space_hid = H5Screate_simple (0, dimens, 0);
  if (space_hid < 0) return false;

  data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_DOUBLE, space_hid, 
			H5P_DEFAULT);
  if (data_hid < 0) 
    {
      H5Sclose (space_hid);
      return false;
    }

  double tmp = double_value ();
  retval = H5Dwrite (data_hid, H5T_NATIVE_DOUBLE, H5S_ALL, H5S_ALL,
		     H5P_DEFAULT, &tmp) >= 0;

  H5Dclose (data_hid);
  H5Sclose (space_hid);

  return retval;
}

bool
octave_bool::load_hdf5 (hid_t loc_id, const char *name,
			bool /* have_h5giterate_bug */)
{
  hid_t data_hid = H5Dopen (loc_id, name);
  hid_t space_id = H5Dget_space (data_hid);

  hsize_t rank = H5Sget_simple_extent_ndims (space_id);

  if (rank != 0)
    { 
      H5Dclose (data_hid);
      return false;
    }

  double dtmp;
  if (H5Dread (data_hid, H5T_NATIVE_DOUBLE, H5S_ALL, H5S_ALL, 
	       H5P_DEFAULT, &dtmp) < 0)
    { 
      H5Dclose (data_hid);
      return false;
    }

  scalar = (dtmp != 0.);

  H5Dclose (data_hid);

  return true;
}
#endif

/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/