76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
/* pvControl.cpp */
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/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* EPICS pvData is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*/
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/**
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* @author mrk
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*/
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#include <string>
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#include <stdexcept>
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#include <pv/pvType.h>
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#include <pv/pvIntrospect.h>
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#include <pv/pvData.h>
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#include <pv/pvControl.h>
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namespace epics { namespace pvData {
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using std::tr1::static_pointer_cast;
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static String noControlFound("No control structure found");
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static String notAttached("Not attached to an control structure");
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bool PVControl::attach(PVFieldPtr const & pvField)
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{
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if(pvField->getField()->getType()!=structure) {
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pvField->message(noControlFound,errorMessage);
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return false;
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}
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PVStructurePtr pvStructure = static_pointer_cast<PVStructure>(pvField);
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pvLow = pvStructure->getDoubleField("limitLow");
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if(pvLow.get()==NULL) {
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pvField->message(noControlFound,errorMessage);
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return false;
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}
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pvHigh = pvStructure->getDoubleField(String("limitHigh"));
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if(pvHigh.get()==NULL) {
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pvLow.reset();
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pvField->message(noControlFound,errorMessage);
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return false;
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}
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return true;
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}
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void PVControl::detach()
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{
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pvLow.reset();
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pvHigh.reset();
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}
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bool PVControl::isAttached(){
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if(pvLow.get()==NULL) return false;
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return true;
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}
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void PVControl::get(Control &control) const
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{
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if(pvLow.get()==NULL) {
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throw std::logic_error(notAttached);
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}
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control.setLow(pvLow->get());
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control.setHigh(pvHigh->get());
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}
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bool PVControl::set(Control const & control)
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{
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if(pvLow.get()==NULL) {
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throw std::logic_error(notAttached);
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}
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if(pvLow->isImmutable() || pvHigh->isImmutable()) return false;
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pvLow->put(control.getLow());
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pvHigh->put(control.getHigh());
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return true;
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}
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}}
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