mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
194 lines
4.7 KiB
C++
194 lines
4.7 KiB
C++
/* JSON serializtion for RESERVE project.
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*
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* Author: Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <cstring>
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#include <villas/formats/json_reserve.hpp>
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#include <villas/timing.hpp>
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using namespace villas::node;
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#define JSON_RESERVE_INTEGER_TARGET 1
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int JsonReserveFormat::packSample(json_t **json_smp, const struct Sample *smp) {
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json_error_t err;
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json_t *json_root;
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json_t *json_data;
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json_t *json_name;
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json_t *json_unit;
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json_t *json_value;
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json_t *json_created = nullptr;
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json_t *json_sequence = nullptr;
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if (smp->flags & (int)SampleFlags::HAS_TS_ORIGIN)
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json_created = json_integer(time_to_double(&smp->ts.origin) * 1e3);
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if (smp->flags & (int)SampleFlags::HAS_SEQUENCE)
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json_sequence = json_integer(smp->sequence);
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json_data = json_array();
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for (unsigned i = 0; i < smp->length; i++) {
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auto sig = smp->signals->getByIndex(i);
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if (!sig)
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return -1;
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if (!sig->name.empty())
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json_name = json_string(sig->name.c_str());
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else {
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char name[32];
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snprintf(name, 32, "signal%u", i);
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json_name = json_string(name);
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}
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if (!sig->unit.empty())
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json_unit = json_string(sig->unit.c_str());
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else
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json_unit = nullptr;
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json_value = json_pack_ex(&err, 0, "{ s: o, s: f }", "name", json_name,
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"value", smp->data[i].f);
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if (!json_value)
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continue;
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if (json_unit)
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json_object_set_new(json_value, "unit", json_unit);
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if (json_created)
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json_object_set_new(json_value, "created", json_created);
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if (json_sequence)
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json_object_set_new(json_value, "sequence", json_sequence);
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json_array_append_new(json_data, json_value);
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}
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json_root = json_pack_ex(&err, 0, "{ s: o }", "measurements", json_data);
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if (json_root == nullptr)
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return -1;
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#if 0
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#ifdef JSON_RESERVE_INTEGER_TARGET
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if (io->out.node) {
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char *endptr;
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char *id_str = strrchr(io->out.node->name, '_');
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if (!id_str)
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return -1;
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int id = strtoul(id_str+1, &endptr, 10);
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if (endptr[0] != 0)
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return -1;
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json_object_set_new(json_root, "target", json_integer(id));
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}
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#else
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if (io->out.node)
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json_object_set_new(json_root, "target", json_string(io->out.node->name));
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#endif
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#endif
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*json_smp = json_root;
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return 0;
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}
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int JsonReserveFormat::unpackSample(json_t *json_smp, struct Sample *smp) {
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int ret, idx;
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double created = -1;
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json_error_t err;
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json_t *json_value, *json_data = nullptr;
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json_t *json_origin = nullptr, *json_target = nullptr;
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size_t i;
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ret = json_unpack_ex(json_smp, &err, 0, "{ s?: o, s?: o, s?: o, s?: o }",
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"origin", &json_origin, "target", &json_target,
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"measurements", &json_data, "setpoints", &json_data);
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if (ret)
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return -1;
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#if 0
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#ifdef JSON_RESERVE_INTEGER_TARGET
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if (json_target && io->in.node) {
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if (!json_is_integer(json_target))
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return -1;
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char *endptr;
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char *id_str = strrchr(io->in.node->name, '_');
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if (!id_str)
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return -1;
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int id = strtoul(id_str+1, &endptr, 10);
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if (endptr[0] != 0)
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return -1;
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if (id != json_integer_value(json_target))
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return 0;
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}
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#else
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if (json_target && io->in.node) {
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const char *target = json_string_value(json_target);
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if (!target)
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return -1;
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if (strcmp(target, io->in.node->name))
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return 0;
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}
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#endif
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#endif
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if (!json_data || !json_is_array(json_data))
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return -1;
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smp->flags = 0;
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smp->length = 0;
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json_array_foreach(json_data, i, json_value) {
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const char *name, *unit = nullptr;
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double value;
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ret = json_unpack_ex(json_value, &err, 0, "{ s: s, s?: s, s: F, s?: F }",
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"name", &name, "unit", &unit, "value", &value,
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"created", &created);
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if (ret)
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return -1;
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auto sig = signals->getByName(name);
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if (sig)
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idx = signals->getIndexByName(name);
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else {
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ret = sscanf(name, "signal_%d", &idx);
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if (ret != 1)
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continue;
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}
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if (idx < 0)
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return -1;
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if (idx < (int)smp->capacity) {
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smp->data[idx].f = value;
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if (idx >= (int)smp->length)
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smp->length = idx + 1;
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}
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}
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if (smp->length > 0)
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smp->flags |= (int)SampleFlags::HAS_DATA;
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if (created > 0) {
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smp->ts.origin = time_from_double(created * 1e-3);
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smp->flags |= (int)SampleFlags::HAS_TS_ORIGIN;
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}
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return smp->length > 0 ? 1 : 0;
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}
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// Register format
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static char n[] = "json.reserve";
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static char d[] = "RESERVE JSON format";
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static FormatPlugin<JsonReserveFormat, n, d,
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(int)SampleFlags::HAS_TS_ORIGIN |
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(int)SampleFlags::HAS_SEQUENCE |
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(int)SampleFlags::HAS_DATA>
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p;
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