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