mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
126 lines
2.9 KiB
C++
126 lines
2.9 KiB
C++
/* Signal meta data.
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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 <villas/exceptions.hpp>
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#include <villas/signal.hpp>
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#include <villas/utils.hpp>
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#include <villas/signal_data.hpp>
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#include <villas/signal_type.hpp>
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using namespace villas;
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using namespace villas::node;
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using namespace villas::utils;
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Signal::Signal(const std::string &n, const std::string &u, enum SignalType t)
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: name(n), unit(u), init(SignalData::nan()), type(t) {}
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int Signal::parse(json_t *json) {
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int ret;
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json_error_t err;
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json_t *json_init = nullptr;
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const char *name_str = nullptr;
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const char *unit_str = nullptr;
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const char *type_str = "float";
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ret = json_unpack_ex(json, &err, 0, "{ s?: s, s?: s, s?: s, s?: o }", "name",
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&name_str, "unit", &unit_str, "type", &type_str, "init",
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&json_init);
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if (ret)
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return -1;
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if (name_str)
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name = name_str;
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if (unit_str)
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unit = unit_str;
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if (type_str) {
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type = signalTypeFromString(type_str);
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if (type == SignalType::INVALID)
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return -1;
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}
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if (json_init) {
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ret = init.parseJson(type, json_init);
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if (ret)
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return ret;
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} else
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init.set(type, 0);
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return 0;
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}
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json_t *Signal::toJson() const {
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json_t *json_sig =
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json_pack("{ s: s }", "type", signalTypeToString(type).c_str());
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auto *json_init = init.toJson(type);
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if (json_init)
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json_object_set_new(json_sig, "init", json_init);
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if (!name.empty())
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json_object_set_new(json_sig, "name", json_string(name.c_str()));
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if (!unit.empty())
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json_object_set_new(json_sig, "unit", json_string(unit.c_str()));
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return json_sig;
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}
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std::string Signal::toString(const union SignalData *d) const {
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std::stringstream ss;
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if (!name.empty())
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ss << " " << name;
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if (!unit.empty())
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ss << " [" << unit << "]";
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ss << "(" << signalTypeToString(type) << ")";
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if (d)
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ss << " = " << d->toString(type);
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return ss.str();
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}
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/* Check if two signal names are numbered ascendingly
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*
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* E.g. signal3 -> signal4
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*/
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static bool isNextName(const std::string &a, const std::string &b) {
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// Find common prefix
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std::string::const_iterator ia, ib;
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for (ia = a.cbegin(), ib = b.cbegin();
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ia != b.cend() && ib != b.cend() && *ia == *ib; ++ia, ++ib)
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;
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// Suffixes
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auto sa = std::string(ia, a.cend());
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auto sb = std::string(ib, b.cend());
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try {
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size_t ea, eb;
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auto na = std::stoul(sa, &ea, 10);
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auto nb = std::stoul(sb, &eb, 10);
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return na + 1 == nb;
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} catch (std::exception &) {
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return false;
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}
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}
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bool Signal::isNext(const Signal &sig) {
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if (type != sig.type)
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return false;
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if (!unit.empty() && !sig.unit.empty() && unit != sig.unit)
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return false;
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return isNextName(name, sig.name);
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}
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