fp@933: /******************************************************************************
fp@933:  *
fp@933:  *  $Id$
fp@933:  *
fp@1326:  *  Copyright (C) 2006-2008  Florian Pose, Ingenieurgemeinschaft IgH
fp@933:  *
fp@933:  *  This file is part of the IgH EtherCAT Master.
fp@933:  *
fp@1326:  *  The IgH EtherCAT Master is free software; you can redistribute it and/or
fp@1326:  *  modify it under the terms of the GNU General Public License version 2, as
fp@1326:  *  published by the Free Software Foundation.
fp@933:  *
fp@1326:  *  The IgH EtherCAT Master is distributed in the hope that it will be useful,
fp@1326:  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
fp@1326:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
fp@1326:  *  Public License for more details.
fp@933:  *
fp@1326:  *  You should have received a copy of the GNU General Public License along
fp@1326:  *  with the IgH EtherCAT Master; if not, write to the Free Software
fp@933:  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
fp@933:  *
fp@1363:  *  ---
fp@1363:  *
fp@1363:  *  The license mentioned above concerns the source code only. Using the
fp@1363:  *  EtherCAT technology and brand is only permitted in compliance with the
fp@1363:  *  industrial property and similar rights of Beckhoff Automation GmbH.
fp@933:  *
fp@933:  *****************************************************************************/
fp@933: 
fp@933: /**
fp@933:    \file
fp@933:    EtherCAT process data object entry methods.
fp@933: */
fp@933: 
fp@933: /*****************************************************************************/
fp@933: 
fp@933: #include <linux/slab.h>
fp@933: 
fp@933: #include "pdo_entry.h"
fp@933: 
fp@933: /*****************************************************************************/
fp@933: 
fp@1327: /** PDO entry constructor.
fp@933:  */
fp@933: void ec_pdo_entry_init(
fp@1327:         ec_pdo_entry_t *entry /**< PDO entry. */
fp@933:         )
fp@933: {
fp@933:     entry->name = NULL;
fp@933: }
fp@933: 
fp@933: /*****************************************************************************/
fp@933: 
fp@1327: /** PDO entry copy constructor.
fp@1313:  *
fp@1313:  * \retval  0 Success.
fp@1313:  * \retval <0 Error code.
fp@933:  */
fp@933: int ec_pdo_entry_init_copy(
fp@1327:         ec_pdo_entry_t *entry, /**< PDO entry. */
fp@1327:         const ec_pdo_entry_t *other /**< PDO entry to copy from. */
fp@933:         )
fp@933: {
fp@933:     entry->index = other->index;
fp@933:     entry->subindex = other->subindex;
fp@933:     entry->name = NULL;
fp@933:     entry->bit_length = other->bit_length;
fp@933: 
fp@1313:     return ec_pdo_entry_set_name(entry, other->name);
fp@933: }
fp@933: 
fp@933: /*****************************************************************************/
fp@933: 
fp@1327: /** PDO entry destructor.
fp@933:  */
fp@1327: void ec_pdo_entry_clear(ec_pdo_entry_t *entry /**< PDO entry. */)
fp@933: {
fp@933:     if (entry->name)
fp@933:         kfree(entry->name);
fp@933: }
fp@933: 
fp@933: /*****************************************************************************/
fp@933: 
fp@1327: /** Set PDO entry name.
fp@1313:  *
fp@1313:  * \retval  0 Success.
fp@1313:  * \retval <0 Error code.
fp@933:  */
fp@933: int ec_pdo_entry_set_name(
fp@1327:         ec_pdo_entry_t *entry, /**< PDO entry. */
fp@933:         const char *name /**< New name. */
fp@933:         )
fp@933: {
fp@933:     unsigned int len;
fp@933: 
fp@1186:     if (entry->name && name && !strcmp(entry->name, name))
fp@1186:         return 0;
fp@2421: 
fp@933:     if (entry->name)
fp@933:         kfree(entry->name);
fp@933: 
fp@933:     if (name && (len = strlen(name))) {
fp@933:         if (!(entry->name = (char *) kmalloc(len + 1, GFP_KERNEL))) {
fp@1327:             EC_ERR("Failed to allocate PDO entry name.\n");
fp@1313:             return -ENOMEM;
fp@933:         }
fp@933:         memcpy(entry->name, name, len + 1);
fp@933:     } else {
fp@933:         entry->name = NULL;
fp@933:     }
fp@933: 
fp@933:     return 0;
fp@933: }
fp@933: 
fp@933: /*****************************************************************************/
fp@933: 
fp@1327: /** Compares two PDO entries.
fp@933:  *
fp@933:  * \retval 1 The entries are equal.
fp@933:  * \retval 0 The entries differ.
fp@933:  */
fp@933: int ec_pdo_entry_equal(
fp@1327:         const ec_pdo_entry_t *entry1, /**< First PDO entry. */
fp@1327:         const ec_pdo_entry_t *entry2 /**< Second PDO entry. */
fp@933:         )
fp@933: {
fp@933:     return entry1->index == entry2->index
fp@933:         && entry1->subindex == entry2->subindex
fp@933:         && entry1->bit_length == entry2->bit_length;
fp@933: }
fp@933: 
fp@933: /*****************************************************************************/