/*
 * Copyright 2014, Kevin Greenan, Tushar Gohad, All rights reserved
 *
 * 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.
 *
 * liberasurecode proprocssing helpers header
 *
 * vi: set noai tw=79 ts=4 sw=4:
 */

#ifndef _ERASURECODE_HELPERS_EXT_H_
#define _ERASURECODE_HELPERS_EXT_H_

#include "erasurecode_backend.h"
#include "erasurecode_helpers.h"

/* ==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~== */

static inline
void init_fragment_header(char *buf)
{
    fragment_header_t *header = (fragment_header_t *) buf;

    header->magic = LIBERASURECODE_FRAG_HEADER_MAGIC;
}

/* ==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~== */

char *alloc_fragment_buffer(int size);
int free_fragment_buffer(char *buf);
int get_aligned_data_size(ec_backend_t instance, int data_len);
char *get_data_ptr_from_fragment(char *buf);
int get_data_ptr_array_from_fragments(char **data_array, char **fragments,
        int num_fragments);
int get_fragment_ptr_array_from_data(char **frag_array, char **data,
        int num_data);
char *get_fragment_ptr_from_data_novalidate(char *buf);
char *get_fragment_ptr_from_data(char *buf);
uint64_t get_fragment_size(char *buf);
int set_fragment_idx(char *buf, int idx);
int get_fragment_idx(char *buf);
int set_fragment_payload_size(char *buf, int size);
int get_fragment_payload_size(char *buf);
int set_fragment_backend_metadata_size(char *buf, int size);
int get_fragment_backend_metadata_size(char *buf);
int get_fragment_buffer_size(char *buf);
int set_orig_data_size(char *buf, int orig_data_size);
int get_orig_data_size(char *buf);
int set_checksum(ec_checksum_type_t ct, char *buf, int blocksize);
int get_checksum(char *buf); //TODO implement this
int set_libec_version(char *fragment);
int get_libec_version(char *fragment, uint32_t *ver);
int set_backend_id(char *buf, ec_backend_id_t id);
int get_backend_id(char *buf, ec_backend_id_t *id);
int set_backend_version(char *buf, uint32_t version);
int get_backend_version(char *buf, uint32_t *version);

/* ==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~==~=*=~== */

#endif  // _ERASURECODE_HELPERS_EXT_H_