Function my_b_append

mysys/mf_iocache.c:1609–1650

*/

int my_b_append(register IO_CACHE *info, const uchar *Buffer, size_t Count)
{
  size_t rest_length,length;

  /*
    Assert that we cannot come here with a shared cache. If we do one
    day, we might need to add a call to copy_to_read_buffer().
  */
  DBUG_ASSERT(!info->share);

  lock_append_buffer(info);
  rest_length= (size_t) (info->write_end - info->write_pos);
  if (Count <= rest_length)
    goto end;
  memcpy(info->write_pos, Buffer, rest_length);
  Buffer+=rest_length;
  Count-=rest_length;
  info->write_pos+=rest_length;
  if (my_b_flush_io_cache(info,0))
  {
    unlock_append_buffer(info);
    return 1;
  }
  if (Count >= IO_SIZE)
  {					/* Fill first intern buffer */
    length=Count & (size_t) ~(IO_SIZE-1);
    if (mysql_file_write(info->file,Buffer, length, info->myflags | MY_NABP))
    {
      unlock_append_buffer(info);
      return info->error= -1;
    }
    Count-=length;
    Buffer+=length;
    info->end_of_file+=length;
  }

end:
  memcpy(info->write_pos,Buffer,(size_t) Count);
  info->write_pos+=Count;
  unlock_append_buffer(info);
  return 0;
}


int my_b_safe_write(IO_CACHE *info, const uchar *Buffer, size_t Count)