/* Copyright (c) 2015, Michael Santos <michael.santos@gmail.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include "alcove.h"

int alcove_encode_cstruct(char *reply, size_t rlen, int *rindex,
                          const char *buf, size_t len, alcove_alloc_t *ptr,
                          ssize_t nptr) {
  int i = 0;
  size_t offset = 0;

  if (alcove_encode_list_header(reply, rlen, rindex, nptr) < 0)
    return -1;

  for (; i < nptr; i++) {
    if (ptr[i].p) {
      if (offset + sizeof(void *) > len)
        return -1;

      /* Allocated buffer */
      if (alcove_encode_tuple_header(reply, rlen, rindex, 2) < 0)
        return -1;
      if (alcove_encode_atom(reply, rlen, rindex, "ptr") < 0)
        return -1;
      if (alcove_encode_binary(reply, rlen, rindex, ptr[i].p, ptr[i].len) < 0)
        return -1;
      free(ptr[i].p);
      offset += sizeof(void *);
    } else {
      if (offset + ptr[i].len > len)
        return -1;

      /* Static binary */
      if (alcove_encode_binary(reply, rlen, rindex, buf + offset, ptr[i].len) <
          0)
        return -1;
      offset += ptr[i].len;
    }
  }

  if (alcove_encode_empty_list(reply, rlen, rindex) < 0)
    return -1;

  free(ptr);
  ptr = NULL;

  return 0;
}