BLI_utildefines_iter.h

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#define BLI_FOREACH_SPARSE_RANGE(src, dst, i) \
  for (int _src = (src), \
           _src2 = _src * 2, \
           _dst2 = (dst) * 2, \
           _error = _dst2 - _src, \
           i = 0, \
           _delta; \
       ((void)(_delta = divide_floor_i(_error, _dst2)), (void)(i -= _delta), (i < _src)); \
       _error -= (_delta * _dst2) + _src2)