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/*
* Copyright 2014 Kevin M Greenan
* Copyright 2014 Tushar Gohad
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY
* THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* isa_l_rs_vand backend implementation
*
* vi: set noai tw=79 ts=4 sw=4:
*/
#define ISA_L_W 8
/* Forward declarations */
typedef void (*ec_encode_data_func)(int, int, int, unsigned char*, unsigned char **, unsigned char **);
typedef void (*ec_init_tables_func)(int, int, unsigned char*, unsigned char *);
typedef void (*gf_gen_encoding_matrix_func)(unsigned char*, int, int);
typedef int (*gf_invert_matrix_func)(unsigned char*, unsigned char*, const int);
typedef unsigned char (*gf_mul_func)(unsigned char, unsigned char);
typedef struct {
/* calls required for init */
ec_init_tables_func ec_init_tables;
gf_gen_encoding_matrix_func gf_gen_encoding_matrix;
/* calls required for encode */
ec_encode_data_func ec_encode_data;
/* calls required for decode and reconstruct */
gf_invert_matrix_func gf_invert_matrix;
/* multiplication function used by ISA-L */
gf_mul_func gf_mul;
/* fields needed to hold state */
unsigned char *matrix;
unsigned char *encode_tables;
int k;
int m;
int w;
} isa_l_descriptor;
int isa_l_encode(void *desc, char **data, char **parity, int blocksize);
int isa_l_decode(void *desc, char **data, char **parity, int *missing_idxs,
int blocksize);
int isa_l_reconstruct(void *desc, char **data, char **parity,
int *missing_idxs, int destination_idx, int blocksize);
int isa_l_min_fragments(void *desc, int *missing_idxs,
int *fragments_to_exclude, int *fragments_needed);
int isa_l_element_size(void* desc);
int isa_l_exit(void *desc);
void * isa_l_common_init(struct ec_backend_args *args, void *backend_sohandle,
const char* gen_matrix_func_name);
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