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VILLASnode/lib/hooks/limit_value.cpp
Steffen Vogel 7eec1bb753 update Steffens mail address
Signed-off-by: Steffen Vogel <post@steffenvogel.de>
2022-12-16 23:44:07 +01:00

93 lines
2 KiB
C++

/** Limit hook.
*
* @author Steffen Vogel <post@steffenvogel.de>
* @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
* @license Apache 2.0
*********************************************************************************/
#include <bitset>
#include <cstring>
#include <villas/hook.hpp>
#include <villas/node/exceptions.hpp>
#include <villas/signal.hpp>
#include <villas/sample.hpp>
namespace villas {
namespace node {
class LimitValueHook : public MultiSignalHook {
protected:
unsigned offset;
float min, max;
public:
LimitValueHook(Path *p, Node *n, int fl, int prio, bool en = true) :
MultiSignalHook(p, n, fl, prio, en),
offset(0),
min(0),
max(0)
{ }
virtual void parse(json_t *json)
{
int ret;
json_error_t err;
assert(state != State::STARTED);
MultiSignalHook::parse(json);
ret = json_unpack_ex(json, &err, 0, "{ s: f, s: f }",
"min", &min,
"max", &max
);
if (ret)
throw ConfigError(json, err, "node-config-hook-average");
state = State::PARSED;
}
virtual Hook::Reason process(struct Sample *smp)
{
assert(state == State::STARTED);
for (auto index : signalIndices) {
switch (sample_format(smp, index)) {
case SignalType::INTEGER:
if (smp->data[index].i > max)
smp->data[index].i = max;
if (smp->data[index].i < min)
smp->data[index].i = min;
break;
case SignalType::FLOAT:
if (smp->data[index].f > max)
smp->data[index].f = max;
if (smp->data[index].f < min)
smp->data[index].f = min;
break;
case SignalType::INVALID:
case SignalType::COMPLEX:
case SignalType::BOOLEAN:
return Hook::Reason::ERROR; /* not supported */
}
}
return Reason::OK;
}
};
/* Register hook */
static char n[] = "limit_value";
static char d[] = "Limit signal values";
static HookPlugin<LimitValueHook, n , d, (int) Hook::Flags::PATH | (int) Hook::Flags::NODE_READ | (int) Hook::Flags::NODE_WRITE> p;
} /* namespace node */
} /* namespace villas */