/* Configure the RS codec with fixed parameters for CCSDS standard
 * (255,223) code over GF(256). Note: the conventional basis is still
 * used; the dual-basis mappings are performed in [en|de]code_rs_ccsds.c
 *
 * Copyright 2002 Phil Karn, KA9Q
 * May be used under the terms of the GNU General Public License (GPL)
 */
#define DTYPE unsigned char

#include <gnuradio/fec/api.h>

static inline int mod255(int x)
{
    while (x >= 255) {
        x -= 255;
        x = (x >> 8) + (x & 255);
    }
    return x;
}
#define MODNN(x) mod255(x)

extern unsigned char CCSDS_alpha_to[];
extern unsigned char CCSDS_index_of[];
extern unsigned char CCSDS_poly[];

#define MM 8
#define NN 255
#define ALPHA_TO CCSDS_alpha_to
#define INDEX_OF CCSDS_index_of
#define GENPOLY CCSDS_poly
#define NROOTS 32
#define FCR 112
#define PRIM 11
#define IPRIM 116
#define A0 (NN)

#define ENCODE_RS encode_rs_8
#define DECODE_RS decode_rs_8

FEC_API void ENCODE_RS(DTYPE* data, DTYPE* parity);
FEC_API int DECODE_RS(DTYPE* data, int* eras_pos, int no_eras);