mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-16 00:00:02 +01:00
110 lines
2.5 KiB
C++
110 lines
2.5 KiB
C++
/** Cast hook.
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*
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* @author Steffen Vogel <post@steffenvogel.de>
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* @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
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* @license Apache 2.0
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*********************************************************************************/
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#include <cstring>
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#include <villas/hook.hpp>
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#include <villas/sample.hpp>
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namespace villas {
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namespace node {
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class CastHook : public MultiSignalHook {
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protected:
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enum SignalType new_type;
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std::string new_name;
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std::string new_unit;
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public:
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CastHook(Path *p, Node *n, int fl, int prio, bool en = true) :
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MultiSignalHook(p, n, fl, prio, en),
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new_type(SignalType::INVALID)
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{ }
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virtual void prepare()
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{
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assert(state == State::CHECKED);
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MultiSignalHook::prepare();
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for (auto index : signalIndices) {
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auto orig_sig = signals->getByIndex(index);
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auto type = new_type == SignalType::INVALID ? orig_sig->type : new_type;
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auto name = new_name.empty() ? orig_sig->name : new_name;
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auto unit = new_unit.empty() ? orig_sig->unit : new_unit;
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(*signals)[index] = std::make_shared<Signal>(name, unit, type);
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}
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state = State::PREPARED;
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}
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virtual void parse(json_t *json)
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{
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int ret;
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json_error_t err;
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assert(state != State::STARTED);
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MultiSignalHook::parse(json);
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const char *name = nullptr;
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const char *unit = nullptr;
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const char *type = nullptr;
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ret = json_unpack_ex(json, &err, 0, "{ s?: s, s?: s, s?: s }",
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"new_type", &type,
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"new_name", &name,
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"new_unit", &unit
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);
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if (ret)
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throw ConfigError(json, err, "node-config-hook-cast");
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if (type) {
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new_type = signalTypeFromString(type);
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if (new_type == SignalType::INVALID)
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throw RuntimeError("Invalid signal type: {}", type);
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}
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else
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/* We use this constant to indicate that we dont want to change the type. */
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new_type = SignalType::INVALID;
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if (name)
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new_name = name;
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if (unit)
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new_unit = unit;
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state = State::PARSED;
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}
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virtual Hook::Reason process(struct Sample *smp)
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{
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assert(state == State::STARTED);
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for (auto index : signalIndices) {
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auto orig_sig = smp->signals->getByIndex(index);
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auto new_sig = signals->getByIndex(index);
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smp->data[index] = smp->data[index].cast(orig_sig->type, new_sig->type);
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}
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return Reason::OK;
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}
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};
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/* Register hook */
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static char n[] = "cast";
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static char d[] = "Cast signals types";
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static HookPlugin<CastHook, n, d, (int) Hook::Flags::NODE_READ | (int) Hook::Flags::PATH> p;
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} /* namespace node */
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} /* namespace villas */
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