106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
/* pvTimeStamp.cpp */
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/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* EPICS pvDataCPP 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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#include <string>
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#include <stdexcept>
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#include <pv/pvType.h>
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#include <pv/timeStamp.h>
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#include <pv/pvData.h>
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#include <pv/pvTimeStamp.h>
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namespace epics { namespace pvData {
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static String noTimeStamp("No timeStamp structure found");
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static String notAttached("Not attached to a timeStamp structure");
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bool PVTimeStamp::attach(PVField *pvField)
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{
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PVStructure *pvStructure = 0;
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if(pvField->getField()->getFieldName().compare("timeStamp")!=0) {
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PVStructure *pvParent = pvField->getParent();
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if(pvParent==0) {
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pvField->message(noTimeStamp,errorMessage);
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return false;
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}
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if(pvField->getField()->getFieldName().compare("value")!=0) {
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pvField->message(noTimeStamp,errorMessage);
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return false;
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}
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// look up the tree for a timeSyamp
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while(pvParent!=0) {
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PVStructure *pvs = pvParent->getStructureField(String("timeStamp"));
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if(pvs!=0) {
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pvStructure = pvs;
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break;
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}
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pvParent = pvParent->getParent();
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}
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if(pvStructure==0) {
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pvField->message(noTimeStamp,errorMessage);
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return false;
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}
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} else {
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if(pvField->getField()->getType()!=structure) {
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pvField->message(noTimeStamp,errorMessage);
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return false;
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}
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pvStructure = static_cast<PVStructure*>(pvField);
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}
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PVLong *pvLong = pvStructure->getLongField(String("secondsPastEpoch"));
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if(pvLong==0) {
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pvField->message(noTimeStamp,errorMessage);
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return false;
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}
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pvSecs = pvLong;
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PVInt *pvInt = pvStructure->getIntField(String("nanoSeconds"));
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if(pvLong==0) {
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pvField->message(noTimeStamp,errorMessage);
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return false;
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}
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pvNano = pvInt;
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pvInt = pvStructure->getIntField(String("userTag"));
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if(pvInt==0) {
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pvField->message(noTimeStamp,errorMessage);
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return false;
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}
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pvUserTag = pvInt;
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return true;
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}
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void PVTimeStamp::detach()
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{
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pvSecs = 0;
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pvUserTag = 0;
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pvNano = 0;
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}
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bool PVTimeStamp::isAttached() {
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if(pvSecs==0 || pvNano==0) return false;
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return true;
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}
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void PVTimeStamp::get(TimeStamp & timeStamp) const
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{
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if(pvSecs==0 || pvNano==0) {
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throw std::logic_error(notAttached);
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}
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timeStamp.put(pvSecs->get(),pvNano->get());
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timeStamp.setUserTag(pvUserTag->get());
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}
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bool PVTimeStamp::set(TimeStamp const & timeStamp)
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{
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if(pvSecs==0 || pvNano==0 || pvUserTag==0) {
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throw std::logic_error(notAttached);
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}
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if(pvSecs->isImmutable() || pvNano->isImmutable()) return false;
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pvSecs->put(timeStamp.getSecondsPastEpoch());
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pvUserTag->put(timeStamp.getUserTag());
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pvNano->put(timeStamp.getNanoSeconds());
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return true;
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}
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}}
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