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ov-scalar.h
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C/C++ Source or Header
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1997-08-20
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/*
Copyright (C) 1996 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 (octave_scalar_h)
#define octave_scalar_h 1
#if defined (__GNUG__)
#pragma interface
#endif
#include <cstdlib>
#include <string>
class ostream;
#include "lo-utils.h"
#include "mx-base.h"
#include "oct-alloc.h"
#include "str-vec.h"
#include "mappers.h"
#include "ov-base.h"
#include "ov-typeinfo.h"
class Octave_map;
class octave_value_list;
class tree_walker;
// Real scalar values.
class
octave_scalar : public octave_base_value
{
public:
octave_scalar (void)
: octave_base_value (), scalar (0.0) { }
octave_scalar (double d)
: octave_base_value (), scalar (d) { }
octave_scalar (const octave_scalar& s)
: octave_base_value (), scalar (s.scalar) { }
~octave_scalar (void) { }
octave_value *clone (void) { return new octave_scalar (*this); }
void *operator new (size_t size)
{ return allocator.alloc (size); }
void operator delete (void *p, size_t size)
{ allocator.free (p, size); }
octave_value index (const octave_value_list& idx) const;
idx_vector index_vector (void) const { return idx_vector (scalar); }
int rows (void) const { return 1; }
int columns (void) const { return 1; }
bool is_defined (void) const { return true; }
bool is_real_scalar (void) const { return true; }
octave_value all (void) const { return (scalar != 0.0); }
octave_value any (void) const { return (scalar != 0.0); }
bool is_real_type (void) const { return true; }
bool is_scalar_type (void) const { return true; }
bool is_numeric_type (void) const { return true; }
bool valid_as_scalar_index (void) const
{ return (! xisnan (scalar) && NINT (scalar) == 1); }
bool valid_as_zero_index (void) const
{ return (! xisnan (scalar) && NINT (scalar) == 0); }
bool is_true (void) const { return (scalar != 0.0); }
double double_value (bool = false) const { return scalar; }
Matrix matrix_value (bool = false) const { return Matrix (1, 1, scalar); }
Complex complex_value (bool = false) const { return scalar; }
ComplexMatrix complex_matrix_value (bool = false) const
{ return ComplexMatrix (1, 1, Complex (scalar)); }
octave_value not (void) const { return octave_value (! scalar); }
octave_value uminus (void) const { return octave_value (- scalar); }
octave_value transpose (void) const { return octave_value (scalar); }
octave_value hermitian (void) const { return octave_value (scalar); }
void increment (void) { ++scalar; }
void decrement (void) { --scalar; }
octave_value convert_to_str (void) const;
void print (ostream& os, bool pr_as_read_syntax = false);
int type_id (void) const { return t_id; }
string type_name (void) const { return t_name; }
static int static_type_id (void) { return t_id; }
static void register_type (void)
{ t_id = octave_value_typeinfo::register_type (t_name); }
private:
// The value of this scalar.
double scalar;
// For custom memory management.
static octave_allocator allocator;
// Type id of scalar objects, set by register_type().
static int t_id;
// Type name of scalar objects, defined in ov-scalar.cc.
static const string t_name;
};
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/