reed_solomon.h

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/*
 * This file is part of the Aaru Data Preservation Suite.
 * Copyright (c) 2019-2026 Natalia Portillo.
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of the
 * License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef LIBAARUFORMAT_REED_SOLOMON_H
#define LIBAARUFORMAT_REED_SOLOMON_H
 
#include <stddef.h>
#include <stdint.h>

typedef struct rs_context rs_context;

rs_context *rs_create(uint16_t K, uint16_t M);

void rs_free(rs_context *ctx);

uint8_t rs_get_coefficient(const rs_context *ctx, uint16_t m, uint16_t k);

void rs_encode_incremental(uint8_t coeff, const uint8_t *data, uint8_t *parity, size_t shard_size);

int rs_decode(const rs_context *ctx, uint8_t **shards, const uint8_t *present, size_t shard_size);
 
#endif /* LIBAARUFORMAT_REED_SOLOMON_H */