/*

Copyright (C) 1996-2013 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/>.

*/

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

#include "Array-util.h"

#include "gripes.h"
#include "oct-obj.h"
#include "ov.h"
#include "ov-scalar.h"
#include "ov-float.h"
#include "ov-flt-re-mat.h"
#include "ov-typeinfo.h"
#include "ov-null-mat.h"
#include "ops.h"
#include "xdiv.h"
#include "xpow.h"

// scalar unary ops.

DEFUNOP (not, float_scalar)
{
  CAST_UNOP_ARG (const octave_float_scalar&);
  float x = v.float_value ();
  if (xisnan (x))
    gripe_nan_to_logical_conversion ();
  return octave_value (x == 0.0f);
}

DEFUNOP_OP (uplus, float_scalar, /* no-op */)
DEFUNOP_OP (uminus, float_scalar, -)
DEFUNOP_OP (transpose, float_scalar, /* no-op */)
DEFUNOP_OP (hermitian, float_scalar, /* no-op */)

DEFNCUNOP_METHOD (incr, float_scalar, increment)
DEFNCUNOP_METHOD (decr, float_scalar, decrement)

// float by float ops.

DEFBINOP_OP (add, float_scalar, float_scalar, +)
DEFBINOP_OP (sub, float_scalar, float_scalar, -)
DEFBINOP_OP (mul, float_scalar, float_scalar, *)

DEFBINOP (div, float_scalar, float_scalar)
{
  CAST_BINOP_ARGS (const octave_float_scalar&, const octave_float_scalar&);

  float d = v2.float_value ();

  if (d == 0.0)
    gripe_divide_by_zero ();

  return octave_value (v1.float_value () / d);
}

DEFBINOP_FN (pow, float_scalar, float_scalar, xpow)

DEFBINOP (ldiv, float_scalar, float_scalar)
{
  CAST_BINOP_ARGS (const octave_float_scalar&, const octave_float_scalar&);

  float d = v1.float_value ();

  if (d == 0.0)
    gripe_divide_by_zero ();

  return octave_value (v2.float_value () / d);
}

DEFBINOP_OP (lt, float_scalar, float_scalar, <)
DEFBINOP_OP (le, float_scalar, float_scalar, <=)
DEFBINOP_OP (eq, float_scalar, float_scalar, ==)
DEFBINOP_OP (ge, float_scalar, float_scalar, >=)
DEFBINOP_OP (gt, float_scalar, float_scalar, >)
DEFBINOP_OP (ne, float_scalar, float_scalar, !=)

DEFBINOP_OP (el_mul, float_scalar, float_scalar, *)

DEFBINOP (el_div, float_scalar, float_scalar)
{
  CAST_BINOP_ARGS (const octave_float_scalar&, const octave_float_scalar&);

  float d = v2.float_value ();

  if (d == 0.0)
    gripe_divide_by_zero ();

  return octave_value (v1.float_value () / d);
}

DEFBINOP_FN (el_pow, float_scalar, float_scalar, xpow)

DEFBINOP (el_ldiv, float_scalar, float_scalar)
{
  CAST_BINOP_ARGS (const octave_float_scalar&, const octave_float_scalar&);

  float d = v1.float_value ();

  if (d == 0.0)
    gripe_divide_by_zero ();

  return octave_value (v2.float_value () / d);
}

DEFSCALARBOOLOP_OP (el_and, float_scalar, float_scalar, &&)
DEFSCALARBOOLOP_OP (el_or, float_scalar, float_scalar, ||)

DEFNDCATOP_FN (fs_fs, float_scalar, float_scalar, float_array, float_array,
               concat)
DEFNDCATOP_FN (s_fs, scalar, float_scalar, float_array, float_array, concat)
DEFNDCATOP_FN (fs_s, float_scalar, scalar, float_array, float_array, concat)

CONVDECL (float_to_scalar)
{
  CAST_CONV_ARG (const octave_float_scalar&);

  return new octave_matrix (Matrix (1, 1,
                                    static_cast<double>(v.float_value ())));
}

void
install_fs_fs_ops (void)
{
  INSTALL_UNOP (op_not, octave_float_scalar, not);
  INSTALL_UNOP (op_uplus, octave_float_scalar, uplus);
  INSTALL_UNOP (op_uminus, octave_float_scalar, uminus);
  INSTALL_UNOP (op_transpose, octave_float_scalar, transpose);
  INSTALL_UNOP (op_hermitian, octave_float_scalar, hermitian);

  INSTALL_NCUNOP (op_incr, octave_float_scalar, incr);
  INSTALL_NCUNOP (op_decr, octave_float_scalar, decr);

  INSTALL_BINOP (op_add, octave_float_scalar, octave_float_scalar, add);
  INSTALL_BINOP (op_sub, octave_float_scalar, octave_float_scalar, sub);
  INSTALL_BINOP (op_mul, octave_float_scalar, octave_float_scalar, mul);
  INSTALL_BINOP (op_div, octave_float_scalar, octave_float_scalar, div);
  INSTALL_BINOP (op_pow, octave_float_scalar, octave_float_scalar, pow);
  INSTALL_BINOP (op_ldiv, octave_float_scalar, octave_float_scalar, ldiv);
  INSTALL_BINOP (op_lt, octave_float_scalar, octave_float_scalar, lt);
  INSTALL_BINOP (op_le, octave_float_scalar, octave_float_scalar, le);
  INSTALL_BINOP (op_eq, octave_float_scalar, octave_float_scalar, eq);
  INSTALL_BINOP (op_ge, octave_float_scalar, octave_float_scalar, ge);
  INSTALL_BINOP (op_gt, octave_float_scalar, octave_float_scalar, gt);
  INSTALL_BINOP (op_ne, octave_float_scalar, octave_float_scalar, ne);
  INSTALL_BINOP (op_el_mul, octave_float_scalar, octave_float_scalar, el_mul);
  INSTALL_BINOP (op_el_div, octave_float_scalar, octave_float_scalar, el_div);
  INSTALL_BINOP (op_el_pow, octave_float_scalar, octave_float_scalar, el_pow);
  INSTALL_BINOP (op_el_ldiv, octave_float_scalar, octave_float_scalar, el_ldiv);
  INSTALL_BINOP (op_el_and, octave_float_scalar, octave_float_scalar, el_and);
  INSTALL_BINOP (op_el_or, octave_float_scalar, octave_float_scalar, el_or);

  INSTALL_CATOP (octave_float_scalar, octave_float_scalar, fs_fs);
  INSTALL_CATOP (octave_scalar, octave_float_scalar, s_fs);
  INSTALL_CATOP (octave_float_scalar, octave_scalar, fs_s);

  INSTALL_ASSIGNCONV (octave_float_scalar, octave_float_scalar,
                      octave_float_matrix);
  INSTALL_ASSIGNCONV (octave_scalar, octave_float_scalar, octave_matrix);

  INSTALL_ASSIGNCONV (octave_float_scalar, octave_null_matrix,
                      octave_float_matrix);
  INSTALL_ASSIGNCONV (octave_float_scalar, octave_null_str,
                      octave_float_matrix);
  INSTALL_ASSIGNCONV (octave_float_scalar, octave_null_sq_str,
                      octave_float_matrix);

  INSTALL_CONVOP (octave_float_scalar, octave_matrix, float_to_scalar);
}