labcomm.c

/*
  labcomm.c -- runtime for handling encoding and decoding of
               labcomm samples.

  Copyright 2006-2013 Anders Blomdell <anders.blomdell@control.lth.se>

  This file is part of LabComm.

  LabComm is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  LabComm is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifdef LABCOMM_COMPAT
  #include LABCOMM_COMPAT
#else
  #include <stdio.h>
  #include <strings.h>
#endif

#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include <stddef.h>

#include "labcomm.h"
#include "labcomm_private.h"
#include "labcomm_ioctl.h"
#include "labcomm_dynamic_buffer_writer.h"

#define LABCOMM_VERSION "LabComm2013"

/* Unwrapping reader/writer functions */
#define UNWRAP_ac(rw, ac, ...) ac
#define UNWRAP(func, ...)	     \
  while (1) {								\
    if (UNWRAP_ac(__VA_ARGS__)->action->func) {				\
      return UNWRAP_ac(__VA_ARGS__)->action->func(__VA_ARGS__); }	\
    if (UNWRAP_ac(__VA_ARGS__)->next == NULL) { return -ENOSYS; }	\
    UNWRAP_ac( __VA_ARGS__) = UNWRAP_ac(__VA_ARGS__)->next;		\
  }

int labcomm_reader_alloc(struct labcomm_reader *r, 
                         struct labcomm_reader_action_context *action_context, 
                         char *labcomm_version)
{
  UNWRAP(alloc, r, action_context, labcomm_version);
}

int labcomm_reader_free(struct labcomm_reader *r, 
                        struct labcomm_reader_action_context *action_context)
{
  UNWRAP(free, r, action_context);
}

int labcomm_reader_start(struct labcomm_reader *r, 
                         struct labcomm_reader_action_context *action_context,
			 int local_index, int remote_index,
			 struct labcomm_signature *signature,
			 void *value)
{