/*

Copyright (C) 1996-2012 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 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
<http://www.gnu.org/licenses/>.

*/

#if !defined (octave_complex_h)
#define octave_complex_h 1

#include <cstdlib>

#include <iosfwd>
#include <string>

#include "lo-ieee.h"
#include "mx-base.h"
#include "oct-alloc.h"
#include "str-vec.h"

#include "gripes.h"
#include "error.h"
#include "ov-base.h"
#include "ov-cx-mat.h"
#include "ov-base-scalar.h"
#include "ov-typeinfo.h"

class octave_value_list;

class tree_walker;

// Complex scalar values.

class
OCTINTERP_API
octave_complex : public octave_base_scalar<Complex>
{
public:

  octave_complex (void)
    : octave_base_scalar<Complex> () { }

  octave_complex (const Complex& c)
    : octave_base_scalar<Complex> (c) { }

  octave_complex (const octave_complex& c)
    : octave_base_scalar<Complex> (c) { }

  ~octave_complex (void) { }

  octave_base_value *clone (void) const { return new octave_complex (*this); }

  // We return an octave_complex_matrix object here instead of an
  // octave_complex object so that in expressions like A(2,2,2) = 2
  // (for A previously undefined), A will be empty instead of a 1x1
  // object.
  octave_base_value *empty_clone (void) const
    { return new octave_complex_matrix (); }

  type_conv_info numeric_demotion_function (void) const;

  octave_base_value *try_narrowing_conversion (void);

  octave_value do_index_op (const octave_value_list& idx,
                            bool resize_ok = false);

  // Use this to give a more specific error message
  idx_vector index_vector (void) const
  {
    error (
           "attempted to use a complex scalar as an index\n"
           "       (forgot to initialize i or j?)");
    return idx_vector ();
  }

  octave_value any (int = 0) const
    {
      return (scalar != Complex (0, 0)
              && ! (lo_ieee_isnan (std::real (scalar))
                    || lo_ieee_isnan (std::imag (scalar))));
    }

  builtin_type_t builtin_type (void) const { return btyp_complex; }

  bool is_complex_scalar (void) const { return true; }

  bool is_complex_type (void) const { return true; }

  bool is_double_type (void) const { return true; }

  bool is_float_type (void) const { return true; }

  double double_value (bool = false) const;

  float float_value (bool = false) const;

  double scalar_value (bool frc_str_conv = false) const
    { return double_value (frc_str_conv); }

  float float_scalar_value (bool frc_str_conv = false) const
    { return float_value (frc_str_conv); }

  Matrix matrix_value (bool = false) const;

  FloatMatrix float_matrix_value (bool = false) const;

  NDArray array_value (bool = false) const;

  FloatNDArray float_array_value (bool = false) const;

  SparseMatrix sparse_matrix_value (bool = false) const
    { return SparseMatrix (matrix_value ()); }

  SparseComplexMatrix sparse_complex_matrix_value (bool = false) const
    { return SparseComplexMatrix (complex_matrix_value ()); }

  octave_value resize (const dim_vector& dv, bool fill = false) const;

  Complex complex_value (bool = false) const;

  FloatComplex float_complex_value (bool = false) const;

  ComplexMatrix complex_matrix_value (bool = false) const;

  FloatComplexMatrix float_complex_matrix_value (bool = false) const;

  ComplexNDArray complex_array_value (bool = false) const;

  FloatComplexNDArray float_complex_array_value (bool = false) const;

  bool bool_value (bool warn = false) const
  {
    if (xisnan (scalar))
      gripe_nan_to_logical_conversion ();
    else if (warn && scalar != 0.0 && scalar != 1.0)
      gripe_logical_conversion ();

    return scalar != 0.0;
  }

  boolNDArray bool_array_value (bool warn = false) const
  {
    if (xisnan (scalar))
      gripe_nan_to_logical_conversion ();
    else if (warn && scalar != 0.0 && scalar != 1.0)
      gripe_logical_conversion ();

    return boolNDArray (dim_vector (1, 1), scalar != 0.0);
  }

  octave_value diag (octave_idx_type m, octave_idx_type n) const;

  void increment (void) { scalar += 1.0; }

  void decrement (void) { scalar -= 1.0; }

  bool save_ascii (std::ostream& os);

  bool load_ascii (std::istream& is);

  bool save_binary (std::ostream& os, bool& save_as_floats);

  bool load_binary (std::istream& is, bool swap,
                    oct_mach_info::float_format fmt);

#if defined (HAVE_HDF5)
  bool save_hdf5 (hid_t loc_id, const char *name, bool save_as_floats);

  bool load_hdf5 (hid_t loc_id, const char *name);
#endif

  int write (octave_stream& os, int block_size,
             oct_data_conv::data_type output_type, int skip,
             oct_mach_info::float_format flt_fmt) const
    {
      // Yes, for compatibility, we drop the imaginary part here.
      return os.write (array_value (true), block_size, output_type,
                       skip, flt_fmt);
    }

  mxArray *as_mxArray (void) const;

  octave_value map (unary_mapper_t umap) const;

private:

  DECLARE_OCTAVE_ALLOCATOR

  DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
};

typedef octave_complex octave_complex_scalar;

#endif