Array-util.h

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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2000-2026 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/>.
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////////////////////////////////////////////////////////////////////////
 
#if ! defined (octave_Array_util_h)
#define octave_Array_util_h 1
 
#include "octave-config.h"
 
#include "Array-oct.h"
#include "lo-array-errwarn.h"
 
extern OCTAVE_API bool index_in_bounds (const Array<octave_idx_type>& ra_idx,
                                        const dim_vector& dimensions);
 
extern OCTAVE_API void increment_index (Array<octave_idx_type>& ra_idx,
                                        const dim_vector& dimensions,
                                        int start_dimension = 0);
 
extern OCTAVE_API octave_idx_type get_scalar_idx (Array<octave_idx_type>& idx,
                                                  dim_vector& dims);
 
extern OCTAVE_API octave_idx_type num_ones (const Array<octave_idx_type>&
                                            ra_idx);
 
extern OCTAVE_API bool is_scalar (const dim_vector& dim);
 
extern OCTAVE_API bool isvector (const dim_vector& dim);
 
extern OCTAVE_API bool any_ones (const Array<octave_idx_type>& arr);
 
// These four compute a linear index for given dimensions, throwing
// exceptions on invalid indices.
extern OCTAVE_API octave_idx_type
compute_index (octave_idx_type n, const dim_vector& dims);
 
extern OCTAVE_API octave_idx_type
compute_index (octave_idx_type i, octave_idx_type j, const dim_vector& dims);
 
extern OCTAVE_API octave_idx_type
compute_index (octave_idx_type i, octave_idx_type j, octave_idx_type k,
               const dim_vector& dims);
 
extern OCTAVE_API octave_idx_type
compute_index (const Array<octave_idx_type>& ra_idx, const dim_vector& dims);
 
extern OCTAVE_API Array<octave_idx_type>
conv_to_int_array (const Array<octave::idx_vector>& a);
 
extern OCTAVE_API Array<octave::idx_vector>
conv_to_array (const octave::idx_vector *tmp, const octave_idx_type len);
 
extern OCTAVE_API dim_vector
freeze (Array<octave::idx_vector>& ra_idx, const dim_vector& dimensions,
        int resize_ok);
 
extern OCTAVE_API bool vector_equivalent (const dim_vector& dv);
 
extern OCTAVE_API bool
any_orig_empty (const Array<octave::idx_vector>& ra_idx);
 
extern OCTAVE_API bool
all_colon_equiv (const Array<octave::idx_vector>& ra_idx,
                 const dim_vector& frozen_lengths);
 
extern OCTAVE_API bool all_ones (const Array<octave_idx_type>& arr);
 
extern OCTAVE_API Array<octave_idx_type>
get_elt_idx (const Array<octave::idx_vector>& ra_idx,
             const Array<octave_idx_type>& result_idx);
 
extern OCTAVE_API Array<octave_idx_type> get_ra_idx (octave_idx_type idx,
                                                     const dim_vector& dims);
 
extern OCTAVE_API dim_vector
zero_dims_inquire (const Array<octave::idx_vector>& ia, const dim_vector& rhdv);
 
extern OCTAVE_API dim_vector
zero_dims_inquire (const octave::idx_vector& i, const octave::idx_vector& j,
                   const dim_vector& rhdv);
 
extern OCTAVE_API octave::idx_vector
sub2ind (const dim_vector& dv, const Array<octave::idx_vector>& idxa);
 
extern OCTAVE_API Array<octave::idx_vector>
ind2sub (const dim_vector& dv, const octave::idx_vector& idx);
 
struct
permute_vector
{
  octave_idx_type pidx;
  octave_idx_type iidx;
};
 
extern int OCTAVE_API permute_vector_compare (const void *a, const void *b);
 
#endif