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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright 2023 Red Hat
*/
#ifndef UDS_RADIX_SORT_H
#define UDS_RADIX_SORT_H
/*
* Radix sort is implemented using an American Flag sort, an unstable, in-place 8-bit radix
* exchange sort. This is adapted from the algorithm in the paper by Peter M. McIlroy, Keith
* Bostic, and M. Douglas McIlroy, "Engineering Radix Sort".
*
* http://www.usenix.org/publications/compsystems/1993/win_mcilroy.pdf
*/
struct radix_sorter;
int __must_check uds_make_radix_sorter(unsigned int count, struct radix_sorter **sorter);
void uds_free_radix_sorter(struct radix_sorter *sorter);
int __must_check uds_radix_sort(struct radix_sorter *sorter, const unsigned char *keys[],
unsigned int count, unsigned short length);
#endif /* UDS_RADIX_SORT_H */
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