ScalarBuilder Struct Reference

#include "pvif.h"

Inheritance diagram for ScalarBuilder:

Collaboration diagram for ScalarBuilder:

Public Member Functions
virtual	~ScalarBuilder ()
virtual epics::pvData::FieldConstPtr	dtype (dbChannel *channel) OVERRIDE FINAL
virtual PVIF *	attach (dbChannel *channel, const epics::pvData::PVStructurePtr &root, const FieldName &fld) OVERRIDE FINAL
Public Member Functions inherited from PVIFBuilder
virtual	~PVIFBuilder ()
virtual epics::pvData::FieldBuilderPtr	dtype (epics::pvData::FieldBuilderPtr &builder, const std::string &fld, dbChannel *channel)

Additional Inherited Members
Static Public Member Functions inherited from PVIFBuilder
static PVIFBuilder *	create (const std::string &name)
Protected Member Functions inherited from PVIFBuilder
	PVIFBuilder ()

Detailed Description

Definition at line 405 of file pvif.h.

Constructor & Destructor Documentation

virtual ScalarBuilder::~ScalarBuilder ( )

inlinevirtual

Definition at line 407 of file pvif.h.

{}

Member Function Documentation

PVIF * ScalarBuilder::attach ( dbChannel *  channel, const epics::pvData::PVStructurePtr &  root, const FieldName &  fld  )

virtual

Implements PVIFBuilder.

Definition at line 822 of file pvif.cpp.

{
    if(!channel)
        throw std::runtime_error("+type:\"scalar\" requires +channel:");
    pvd::PVField *enclosing = 0;
    pvd::PVFieldPtr fld(fldname.lookup(root, &enclosing));

    const short dbr = dbChannelFinalFieldType(channel);
    const long maxelem = dbChannelFinalElements(channel);

    if(maxelem==1) {
        switch(dbr) {
        case DBR_CHAR:
        case DBR_UCHAR:
        case DBR_SHORT:
        case DBR_USHORT:
        case DBR_LONG:
        case DBR_ULONG:
#ifdef USE_INT64
        case DBR_INT64:
        case DBR_UINT64:
#endif
            return new PVIFScalarNumeric<pvScalar, metaDOUBLE>(channel, fld, enclosing);
        case DBR_FLOAT:
        case DBR_DOUBLE:
            return new PVIFScalarNumeric<pvScalar, metaDOUBLE>(channel, fld, enclosing);
        case DBR_ENUM:
            return new PVIFScalarNumeric<pvScalar, metaENUM>(channel, fld, enclosing);
        case DBR_STRING:
            return new PVIFScalarNumeric<pvScalar, metaSTRING>(channel, fld, enclosing);
        }
    } else {
        switch(dbr) {
        case DBR_CHAR:
        case DBR_UCHAR:
        case DBR_SHORT:
        case DBR_ENUM:
        case DBR_USHORT:
        case DBR_LONG:
        case DBR_ULONG:
        case DBR_STRING:
        case DBR_FLOAT:
#ifdef USE_INT64
        case DBR_INT64:
        case DBR_UINT64:
#endif
        case DBR_DOUBLE:
            return new PVIFScalarNumeric<pvArray, metaDOUBLE>(channel, fld, enclosing);
        }
    }

    throw std::invalid_argument("Channel has invalid/unsupported DBR type");
}

epics::pvData::FieldConstPtr ScalarBuilder::dtype ( dbChannel *  channel )

virtual

Implements PVIFBuilder.

Definition at line 767 of file pvif.cpp.

{
    short dbr = dbChannelFinalFieldType(channel);
    const long maxelem = dbChannelFinalElements(channel);
    const pvd::ScalarType pvt = DBR2PVD(dbr);

    if(INVALID_DB_REQ(dbr))
        throw std::invalid_argument("DBF code out of range");

    if(maxelem!=1 && dbr==DBR_ENUM)
        dbr = DBF_SHORT;

    pvd::FieldBuilderPtr builder(pvd::getFieldCreate()->createFieldBuilder());
    pvd::StandardFieldPtr standard(pvd::getStandardField());

    if(dbr==DBR_ENUM)
        builder = builder->setId("epics:nt/NTEnum:1.0")
                         ->addNestedStructure("value")
                            ->setId("enum_t")
                            ->add("index", pvd::pvInt)
                            ->addArray("choices", pvd::pvString)
                         ->endNested();
    else if(maxelem==1)
        builder = builder->setId("epics:nt/NTScalar:1.0")
                         ->add("value", pvt);
    else
        builder = builder->setId("epics:nt/NTScalarArray:1.0")
                         ->addArray("value", pvt);

    builder = builder->add("alarm", standard->alarm())
                     ->add("timeStamp", standard->timeStamp());

    if(dbr!=DBR_ENUM) {
        builder = builder->addNestedStructure("display")
                            ->add("limitLow", pvd::pvDouble)
                            ->add("limitHigh", pvd::pvDouble)
                            ->add("description", pvd::pvString)
                            ->add("units", pvd::pvString)
                            ->add("precision", pvd::pvInt)
                            ->addNestedStructure("form")
                                ->setId("enum_t")
                                ->add("index", pvd::pvInt)
                                ->addArray("choices", pvd::pvString)
                            ->endNested()
                         ->endNested()
                         ->add("control", standard->control());

        if(dbr!=DBR_STRING)
            builder = builder->add("valueAlarm", standard->doubleAlarm());
    }

    return builder->createStructure();
}

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The documentation for this struct was generated from the following files:

• modules/pva2pva/pdbApp/pvif.h
• modules/pva2pva/pdbApp/pvif.cpp