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VILLASnode/lib/formats/json_edgeflex.cpp

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2.5 KiB
C++

/** JSON serializtion for edgeFlex project.
*
* @author Manuel Pitz <manuel.pitz@eonerc.rwth-aachen.de>
* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
* @license GNU General Public License (version 3)
*
* VILLASnode
*
* 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 3 of the License, or
* any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************************/
#include <cstring>
#include <villas/timing.h>
#include <villas/formats/json_edgeflex.hpp>
using namespace villas::node;
int JsonEdgeflexFormat::packSample(json_t **json_smp, const struct sample *smp)
{
json_error_t err;
json_t *json_value;
if (smp->length < 1)
return -1;
struct signal *sig = (struct signal *) vlist_at_safe(smp->signals, 0);
if (!sig)
return -1;
if (sig->type != SignalType::FLOAT)
return -1;
json_value = json_pack_ex(&err, 0, "{ s: f }",
"value", smp->data[0].f
);
if (json_value == nullptr)
return -1;
if (smp->flags & (int) SampleFlags::HAS_TS_ORIGIN) {
json_t *json_created = json_integer(time_to_double(&smp->ts.origin) * 1e3);
json_object_set_new(json_value, "created", json_created);
}
*json_smp = json_value;
return 0;
}
int JsonEdgeflexFormat::unpackSample(json_t *json_smp, struct sample *smp)
{
int ret;
json_int_t created = -1;
if (smp->capacity < 1)
return -1;
struct signal *sig = (struct signal *) vlist_at_safe(signals, 0);
if (!sig)
return -1;
if (sig->type != SignalType::FLOAT)
return -1;
ret = json_unpack(json_smp, "{ s: f, s?: I }",
"value", &smp->data[0].f,
"created", &created
);
if (ret)
return ret;
if (created >= 0) {
smp->ts.origin = time_from_double(created / 1e3);
smp->flags |= (int) SampleFlags::HAS_TS_ORIGIN;
}
return 0;
}
static char n[] = "json.edgeflex";
static char d[] = "EdgeFlex JSON format";
static FormatPlugin<JsonEdgeflexFormat, n, d, (int) SampleFlags::HAS_TS_ORIGIN | (int) SampleFlags::HAS_SEQUENCE | (int) SampleFlags::HAS_DATA> p;