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https://git.rwth-aachen.de/acs/public/villas/node/
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108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/** Signal meta data.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program 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
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* GNU General 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#include <string.h>
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#include "villas/signal.h"
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#include "villas/list.h"
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#include "villas/utils.h"
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#include "villas/node.h"
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int signal_destroy(struct signal *s)
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{
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if (s->name)
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free(s->name);
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return 0;
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}
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int signal_parse(struct signal *s, json_t *cfg)
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{
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int ret;
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json_error_t err;
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const char *name;
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const char *unit = NULL;
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/* Default values */
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s->enabled = true;
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ret = json_unpack_ex(cfg, &err, 0, "{ s: s, s?: s, s?: b }",
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"name", &name,
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"unit", &unit,
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"enabled", &s->enabled
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);
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if (ret)
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return -1;
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s->name = strdup(name);
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s->unit = unit
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? strdup(unit)
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: NULL;
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return 0;
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}
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int signal_parse_list(struct list *list, json_t *cfg)
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{
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int ret;
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struct signal *s;
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if (!json_is_array(cfg))
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return -1;
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size_t index;
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json_t *json_signal;
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json_array_foreach(cfg, index, json_signal) {
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s = alloc(sizeof(struct signal));
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if (!s)
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return -1;
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ret = signal_parse(s, json_signal);
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if (ret)
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return -1;
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list_push(list, s);
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}
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return 0;
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}
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int signal_get_offsets(const char *str, struct list *sigs)
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{
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int idx;
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char *endptr;
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struct signal *s;
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/* Lets try to find a signal with a matching name */
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if (1) {
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s = list_lookup(sigs, str);
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if (s)
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return list_index(sigs, s);
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}
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/* Lets try to interpret the signal name as an index */
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idx = strtoul(str, &endptr, 10);
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if (endptr == str + strlen(str))
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return idx;
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return -1;
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}
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