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/******************************************************************************
*
* $Id$
*
* Copyright (C) 2006-2008 Florian Pose, Ingenieurgemeinschaft IgH
*
* This file is part of the IgH EtherCAT Master.
*
* The IgH EtherCAT Master is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
* The IgH EtherCAT Master 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 the IgH EtherCAT Master; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* ---
*
* The license mentioned above concerns the source code only. Using the
* EtherCAT technology and brand is only permitted in compliance with the
* industrial property and similar rights of Beckhoff Automation GmbH.
*
*****************************************************************************/
/**
\file
EtherCAT process data object entry methods.
*/
/*****************************************************************************/
#include <linux/slab.h>
#include "pdo_entry.h"
/*****************************************************************************/
/** PDO entry constructor.
*/
void ec_pdo_entry_init(
ec_pdo_entry_t *entry /**< PDO entry. */
)
{
entry->name = NULL;
}
/*****************************************************************************/
/** PDO entry copy constructor.
*
* \retval 0 Success.
* \retval <0 Error code.
*/
int ec_pdo_entry_init_copy(
ec_pdo_entry_t *entry, /**< PDO entry. */
const ec_pdo_entry_t *other /**< PDO entry to copy from. */
)
{
entry->index = other->index;
entry->subindex = other->subindex;
entry->name = NULL;
entry->bit_length = other->bit_length;
return ec_pdo_entry_set_name(entry, other->name);
}
/*****************************************************************************/
/** PDO entry destructor.
*/
void ec_pdo_entry_clear(ec_pdo_entry_t *entry /**< PDO entry. */)
{
if (entry->name)
kfree(entry->name);
}
/*****************************************************************************/
/** Set PDO entry name.
*
* \retval 0 Success.
* \retval <0 Error code.
*/
int ec_pdo_entry_set_name(
ec_pdo_entry_t *entry, /**< PDO entry. */
const char *name /**< New name. */
)
{
unsigned int len;
if (entry->name && name && !strcmp(entry->name, name))
return 0;
if (entry->name)
kfree(entry->name);
if (name && (len = strlen(name))) {
if (!(entry->name = (char *) kmalloc(len + 1, GFP_KERNEL))) {
EC_ERR("Failed to allocate PDO entry name.\n");
return -ENOMEM;
}
memcpy(entry->name, name, len + 1);
} else {
entry->name = NULL;
}
return 0;
}
/*****************************************************************************/
/** Compares two PDO entries.
*
* \retval 1 The entries are equal.
* \retval 0 The entries differ.
*/
int ec_pdo_entry_equal(
const ec_pdo_entry_t *entry1, /**< First PDO entry. */
const ec_pdo_entry_t *entry2 /**< Second PDO entry. */
)
{
return entry1->index == entry2->index
&& entry1->subindex == entry2->subindex
&& entry1->bit_length == entry2->bit_length;
}
/*****************************************************************************/
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