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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2007-2021 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 (octave_oct_handle_h)
#define octave_oct_handle_h 1
#include "octave-config.h"
#include "dMatrix.h"
#include "lo-ieee.h"
#include "error.h"
#include "ov.h"
// ---------------------------------------------------------------------
class octave_handle
{
public:
octave_handle (void) : val (octave::numeric_limits<double>::NaN ()) { }
octave_handle (const octave_value& a)
: val (octave::numeric_limits<double>::NaN ())
{
if (a.isempty ())
; // do nothing
else
{
try
{
val = a.double_value ();
}
catch (octave::execution_exception& e)
{
error (e, "invalid handle");
}
}
}
octave_handle (int a) : val (a) { }
octave_handle (double a) : val (a) { }
octave_handle (const octave_handle& a) : val (a.val) { }
octave_handle& operator = (const octave_handle& a)
{
if (&a != this)
val = a.val;
return *this;
}
~octave_handle (void) = default;
double value (void) const { return val; }
octave_value as_octave_value (void) const
{
return ok () ? octave_value (val) : octave_value (Matrix ());
}
// Prefix increment/decrement operators.
octave_handle& operator ++ (void)
{
++val;
return *this;
}
octave_handle& operator -- (void)
{
--val;
return *this;
}
// Postfix increment/decrement operators.
const octave_handle operator ++ (int)
{
octave_handle old_value = *this;
++(*this);
return old_value;
}
const octave_handle operator -- (int)
{
octave_handle old_value = *this;
--(*this);
return old_value;
}
bool ok (void) const { return ! octave::math::isnan (val); }
private:
double val;
};
inline bool
operator == (const octave_handle& a, const octave_handle& b)
{
return a.value () == b.value ();
}
inline bool
operator != (const octave_handle& a, const octave_handle& b)
{
return a.value () != b.value ();
}
inline bool
operator < (const octave_handle& a, const octave_handle& b)
{
return a.value () < b.value ();
}
inline bool
operator <= (const octave_handle& a, const octave_handle& b)
{
return a.value () <= b.value ();
}
inline bool
operator >= (const octave_handle& a, const octave_handle& b)
{
return a.value () >= b.value ();
}
inline bool
operator > (const octave_handle& a, const octave_handle& b)
{
return a.value () > b.value ();
}
#endif
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