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// Copyright (c) 1998-2003 ETH Zurich (Switzerland).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1/Matrix_search/include/CGAL/Cartesian_matrix.h $
// $Id: include/CGAL/Cartesian_matrix.h b26b07a1242 $
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s) : Michael Hoffmann <hoffmann@inf.ethz.ch>
#ifndef CGAL_CARTESIAN_MATRIX_H
#define CGAL_CARTESIAN_MATRIX_H 1
#include <CGAL/license/Matrix_search.h>
#include <CGAL/basic.h>
#include <CGAL/assertions.h>
#include <type_traits>
namespace CGAL {
template < class Operation,
class RandomAccessIC_row,
class RandomAccessIC_column >
class Cartesian_matrix {
public:
typedef typename std::invoke_result<Operation, typename std::iterator_traits<RandomAccessIC_row>::value_type, typename std::iterator_traits<RandomAccessIC_column>::value_type>::type Value;
Cartesian_matrix(RandomAccessIC_row r_f,
RandomAccessIC_row r_l,
RandomAccessIC_column c_f,
RandomAccessIC_column c_l)
: row_vec(r_f),
column_vec(c_f),
n_rows(static_cast<int>(r_l - r_f)),
n_columns(static_cast<int>(c_l - c_f))
{}
Cartesian_matrix(RandomAccessIC_row r_f,
RandomAccessIC_row r_l,
RandomAccessIC_column c_f,
RandomAccessIC_column c_l,
const Operation& o)
: row_vec(r_f),
column_vec(c_f),
n_rows(static_cast<int>(r_l - r_f)),
n_columns(static_cast<int>(c_l - c_f)),
op(o)
{}
int
number_of_rows() const
{ return n_rows; }
int
number_of_columns() const
{ return n_columns; }
Value
operator()(int r, int c) const
{
CGAL_precondition(r >= 0 && r < number_of_rows());
CGAL_precondition(c >= 0 && c < number_of_columns());
return op(row_vec[r], column_vec[c]);
}
protected:
RandomAccessIC_row row_vec;
RandomAccessIC_column column_vec;
int n_rows;
int n_columns;
Operation op;
}; // class Cartesian_matrix< ... >
template < class Operation,
class RandomAccessIC_row,
class RandomAccessIC_column >
inline
Cartesian_matrix< Operation,
RandomAccessIC_row,
RandomAccessIC_column >
cartesian_matrix( RandomAccessIC_row r_f,
RandomAccessIC_row r_l,
RandomAccessIC_column c_f,
RandomAccessIC_column c_l,
const Operation& o)
{
return
Cartesian_matrix< Operation,
RandomAccessIC_row,
RandomAccessIC_column >
( r_f, r_l, c_f, c_l, o);
}
} //namespace CGAL
#endif // ! (CGAL_CARTESIAN_MATRIX_H)
// ----------------------------------------------------------------------------
// ** EOF
// ----------------------------------------------------------------------------
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