/***************************************************************************
                          lib/ibPad.c
                             -------------------

    copyright            : (C) 2001,2002,2003 by Frank Mori Hess
    email                : fmhess@users.sourceforge.net
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "ib_internal.h"

int internal_ibpad(ibConf_t *conf, unsigned int address)
{
	ibBoard_t *board;
	struct gpib_pad_ioctl pad_cmd;
	int retval;

	board = interfaceBoard(conf);

	if (address > 30) {
		setIberr(EARG);
		fprintf(stderr, "libgpib: invalid gpib address\n");
		return -1;
	}

	pad_cmd.handle = conf->handle;
	pad_cmd.pad = address;
	retval = ioctl(board->fileno, IBPAD, &pad_cmd);
	if (retval < 0)	{
		fprintf(stderr, "libgpib: failed to change gpib primary address\n");
		setIberr(EDVR);
		setIbcnt(errno);
		return retval;
	}

	conf->settings.pad = address;
	return 0;
}

int ibpad(int ud, int addr)
{
	ibConf_t *conf;
	int retval;

	conf = enter_library(ud);
	if (conf == NULL)
		return exit_library(ud, 1);

	retval = internal_ibpad(conf, addr);
	if (retval < 0)
		return exit_library(ud, 1);

	return exit_library(ud, 0);
}
