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pvif.cpp
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pvif.cpp
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#include <pv/pvIntrospect.h> /* for pvdVersion.h */
#include <pv/standardField.h>
#include <dbAccess.h>
#include <dbChannel.h>
#include <dbStaticLib.h>
#include <dbLock.h>
#include <dbEvent.h>
#include <alarm.h>
#include <errSymTbl.h>
#include <epicsVersion.h>
#include <errlog.h>
#include <osiSock.h>
#include <pv/status.h>
#include <pv/bitSet.h>
#include <pv/pvData.h>
#include <pv/anyscalar.h>
#include <pv/reftrack.h>
#include <pv/pvAccess.h>
#include <pv/security.h>
#include "sb.h"
#include "pvif.h"
#include <epicsExport.h>
#ifdef EPICS_VERSION_INT
# if EPICS_VERSION_INT>=VERSION_INT(3,16,1,0)
# define USE_INT64
// effects all uses of pv/typemap.h
# define CASE_REAL_INT64
# endif
#endif
namespace pvd = epics::pvData;
namespace pva = epics::pvAccess;
DBCH::DBCH(dbChannel *ch) :chan(ch)
{
if(!chan)
throw std::invalid_argument("NULL channel");
prepare();
}
DBCH::DBCH(const std::string& name)
:chan(dbChannelCreate(name.c_str()))
{
if(!chan)
throw std::invalid_argument(SB()<<"invalid channel: "<<name);
prepare();
}
void DBCH::prepare()
{
if(!chan)
throw std::invalid_argument(SB()<<"NULL channel");
if(dbChannelOpen(chan)) {
dbChannelDelete(chan);
throw std::invalid_argument(SB()<<"Failed to open channel "<<dbChannelName(chan));
}
}
DBCH::~DBCH()
{
if(chan) dbChannelDelete(chan);
}
void DBCH::swap(DBCH& o)
{
std::swap(chan, o.chan);
}
void ASCred::update(const pva::ChannelRequester::shared_pointer& req)
{
pva::PeerInfo::const_shared_pointer info(req->getPeerInfo());
std::string usertemp, hosttemp;
if(info && info->identified) {
hosttemp = info->peer;
if(info->authority=="ca") {
usertemp = info->account;
size_t sep = usertemp.find_last_of('/');
if(sep != std::string::npos) {
// prevent CA auth from claiming to be eg. "krb/someone.special"
usertemp = usertemp.substr(sep+1);
}
} else {
usertemp = info->authority + "/" + info->account;
}
const char role[] = "role/";
groups.resize(info->roles.size());
size_t idx = 0u;
for(pva::PeerInfo::roles_t::const_iterator it(info->roles.begin()), end(info->roles.end()); it!=end; ++it, idx++) {
groups[idx].resize((*it).size()+sizeof(role)); // sizeof(role) includes trailing nil
std::copy(role,
role+sizeof(role)-1,
groups[idx].begin());
std::copy(it->begin(),
it->end(),
groups[idx].begin()+sizeof(role)-1);
groups[idx][groups[idx].size()-1] = '\0';
}
} else {
// legacy and anonymous
hosttemp = req->getRequesterName();
}
// remote names have the form "IP:port"
size_t sep = hosttemp.find_first_of(':');
if(sep == std::string::npos) {
sep = hosttemp.size();
}
hosttemp.resize(sep);
host.resize(hosttemp.size()+1);
std::copy(hosttemp.begin(),
hosttemp.end(),
host.begin());
host[hosttemp.size()] = '\0';
user.resize(usertemp.size()+1);
std::copy(usertemp.begin(),
usertemp.end(),
user.begin());
user[usertemp.size()] = '\0';
}
ASCLIENT::~ASCLIENT()
{
asRemoveClient(&aspvt);
for(size_t i=0, N=grppvt.size(); i<N; i++) {
asRemoveClient(&grppvt[i]);
}
}
void ASCLIENT::add(dbChannel* chan, ASCred& cred)
{
asRemoveClient(&aspvt);
/* asAddClient() fails secure to no-permission */
(void)asAddClient(&aspvt, dbChannelRecord(chan)->asp, dbChannelFldDes(chan)->as_level, &cred.user[0], &cred.host[0]);
grppvt.resize(cred.groups.size(), 0);
for(size_t i=0, N=grppvt.size(); i<N; i++) {
asRemoveClient(&grppvt[i]);
(void)asAddClient(&grppvt[i], dbChannelRecord(chan)->asp, dbChannelFldDes(chan)->as_level, &cred.groups[i][0], &cred.host[0]);
}
}
bool ASCLIENT::canWrite() {
if(!asActive || (aspvt && asCheckPut(aspvt)))
return true;
for(size_t i=0, N=grppvt.size(); i<N; i++) {
if(grppvt[i] && asCheckPut(grppvt[i]))
return true;
}
return false;
}
PVIF::PVIF(dbChannel *ch)
:chan(ch)
{}
namespace {
struct pvTimeAlarm {
dbChannel *chan;
pvd::uint32 nsecMask;
pvd::BitSet maskALWAYS, maskALARM;
pvd::PVLongPtr sec;
pvd::PVIntPtr status, severity, nsec, userTag;
pvd::PVStringPtr message;
pvTimeAlarm() :chan(NULL), nsecMask(0) {}
};
struct pvCommon : public pvTimeAlarm {
pvd::BitSet maskVALUE, maskPROPERTY, maskVALUEPut;
pvd::PVDoublePtr displayLow, displayHigh, controlLow, controlHigh;
pvd::PVStringPtr egu, desc;
pvd::PVIntPtr fmt, prec;
pvd::PVScalarPtr warnLow, warnHigh, alarmLow, alarmHigh;
pvd::PVStringArrayPtr enumopts;
};
struct pvScalar : public pvCommon {
typedef pvd::PVScalar pvd_type;
pvd::PVScalarPtr value;
};
struct pvArray : public pvCommon {
typedef pvd::PVScalarArray pvd_type;
pvd::PVScalarArrayPtr value;
};
struct metaTIME {
DBRstatus
DBRamsg
DBRtime
DBRutag
enum {mask = DBR_STATUS | DBR_AMSG | DBR_TIME | DBR_UTAG};
};
struct metaDOUBLE {
DBRstatus
DBRamsg
DBRunits
DBRprecision
DBRtime
DBRutag
DBRgrDouble
DBRctrlDouble
DBRalDouble
// similar junk
DBRenumStrs
enum {mask = DBR_STATUS | DBR_AMSG | DBR_UNITS | DBR_PRECISION | DBR_TIME | DBR_UTAG | DBR_GR_DOUBLE | DBR_CTRL_DOUBLE | DBR_AL_DOUBLE};
};
struct metaENUM {
DBRstatus
DBRamsg
DBRtime
DBRutag
DBRenumStrs
// similar junk
DBRunits
DBRprecision
DBRgrDouble
DBRctrlDouble
DBRalDouble
enum {mask = DBR_STATUS | DBR_AMSG | DBR_TIME | DBR_UTAG | DBR_ENUM_STRS};
};
struct metaSTRING {
DBRstatus
DBRamsg
DBRtime
DBRutag
// similar junk
DBRenumStrs
DBRunits
DBRprecision
DBRgrDouble
DBRctrlDouble
DBRalDouble
enum {mask = DBR_STATUS | DBR_AMSG | DBR_TIME | DBR_UTAG};
};
void attachTime(pvTimeAlarm& pvm, const pvd::PVStructurePtr& pv)
{
#define FMAP(MNAME, PVT, FNAME, DBE) pvm.MNAME = pv->getSubFieldT<pvd::PVT>(FNAME); \
pvm.mask ## DBE.set(pvm.MNAME->getFieldOffset())
FMAP(status, PVInt, "alarm.status", ALARM);
FMAP(severity, PVInt, "alarm.severity", ALARM);
FMAP(message, PVString, "alarm.message", ALARM);
FMAP(sec, PVLong, "timeStamp.secondsPastEpoch", ALWAYS);
FMAP(nsec, PVInt, "timeStamp.nanoseconds", ALWAYS);
#ifdef HAVE_UTAG
FMAP(userTag, PVInt, "timeStamp.userTag", ALWAYS);
#endif
#undef FMAP
}
static
pvd::shared_vector<const std::string> buildFormats()
{
pvd::shared_vector<std::string> fmt;
fmt.push_back("Default");
fmt.push_back("String");
fmt.push_back("Binary");
fmt.push_back("Decimal");
fmt.push_back("Hex");
fmt.push_back("Exponential");
fmt.push_back("Engineering");
return pvd::freeze(fmt);
}
static const
pvd::shared_vector<const std::string> displayForms(buildFormats());
// lookup fields and populate pvCommon. Non-existant fields will be NULL.
void attachMeta(pvCommon& pvm, const pvd::PVStructurePtr& pv)
{
{
pvd::PVStructurePtr fmt(pv->getSubField<pvd::PVStructure>("display.form"));
if(fmt) {
fmt->getSubFieldT<pvd::PVStringArray>("choices")->replace(displayForms);
}
}
attachTime(pvm, pv);
#define FMAP(MNAME, PVT, FNAME, DBE) pvm.MNAME = pv->getSubField<pvd::PVT>(FNAME); \
if(pvm.MNAME) pvm.mask ## DBE.set(pvm.MNAME->getFieldOffset())
FMAP(displayHigh, PVDouble, "display.limitHigh", PROPERTY);
FMAP(displayLow, PVDouble, "display.limitLow", PROPERTY);
FMAP(controlHigh, PVDouble, "control.limitHigh", PROPERTY);
FMAP(controlLow, PVDouble, "control.limitLow", PROPERTY);
FMAP(egu, PVString, "display.units", PROPERTY);
FMAP(desc, PVString, "display.description", PROPERTY);
FMAP(prec, PVInt, "display.precision", PROPERTY);
FMAP(fmt, PVInt, "display.form.index", PROPERTY);
FMAP(warnHigh, PVScalar, "valueAlarm.highWarningLimit", PROPERTY);
FMAP(warnLow, PVScalar, "valueAlarm.lowWarningLimit", PROPERTY);
FMAP(alarmHigh, PVScalar, "valueAlarm.highAlarmLimit", PROPERTY);
FMAP(alarmLow, PVScalar, "valueAlarm.lowAlarmLimit", PROPERTY);
FMAP(enumopts, PVStringArray, "value.choices", PROPERTY);
#undef FMAP
}
template<typename PVX>
void attachAll(PVX& pvm, const pvd::PVStructurePtr& pv)
{
pvm.value = pv->getSubField<typename PVX::pvd_type>("value.index");
if(!pvm.value)
pvm.value = pv->getSubFieldT<typename PVX::pvd_type>("value");
const pvd::PVField *fld = pvm.value.get();
pvm.maskVALUE.set(fld->getFieldOffset());
for(;fld; fld = fld->getParent()) {
// set field bit and all enclosing structure bits
pvm.maskVALUEPut.set(fld->getFieldOffset());
}
pvm.maskVALUEPut.set(0);
attachMeta(pvm, pv);
}
template<typename Meta>
void mapStatus(const Meta& meta, pvd::PVInt* status, pvd::PVString* message)
{
#ifdef HAVE_UTAG
if(meta.amsg[0]!='\0') {
message->put(meta.amsg);
} else
#endif
if(meta.status<ALARM_NSTATUS)
message->put(epicsAlarmConditionStrings[meta.status]);
else
message->put("???");
// Arbitrary mapping from DB status codes
unsigned out;
switch(meta.status) {
case NO_ALARM:
out = 0;
break;
case READ_ALARM:
case WRITE_ALARM:
case HIHI_ALARM:
case HIGH_ALARM:
case LOLO_ALARM:
case LOW_ALARM:
case STATE_ALARM:
case COS_ALARM:
case HW_LIMIT_ALARM:
out = 1; // DEVICE
break;
case COMM_ALARM:
case TIMEOUT_ALARM:
case UDF_ALARM:
out = 2; // DRIVER
break;
case CALC_ALARM:
case SCAN_ALARM:
case LINK_ALARM:
case SOFT_ALARM:
case BAD_SUB_ALARM:
out = 3; // RECORD
break;
case DISABLE_ALARM:
case SIMM_ALARM:
case READ_ACCESS_ALARM:
case WRITE_ACCESS_ALARM:
out = 4; // DB
break;
default:
out = 6; // UNDEFINED
}
status->put(out);
}
template<typename META>
void putMetaImpl(const pvTimeAlarm& pv, const META& meta)
{
pvd::int32 nsec = meta.time.nsec;
if(pv.nsecMask) {
pv.userTag->put(nsec&pv.nsecMask);
nsec &= ~pv.nsecMask;
#ifdef HAVE_UTAG
} else {
pv.userTag->put(meta.utag);
#endif
}
pv.nsec->put(nsec); pv.sec->put(meta.time.secPastEpoch+POSIX_TIME_AT_EPICS_EPOCH);
}
void putTime(const pvTimeAlarm& pv, unsigned dbe, db_field_log *pfl)
{
metaTIME meta;
long options = (int)metaTIME::mask, nReq = 0;
long status = dbChannelGet(pv.chan, dbChannelFinalFieldType(pv.chan), &meta, &options, &nReq, pfl);
if(status)
throw std::runtime_error("dbGet for meta fails");
putMetaImpl(pv, meta);
if(dbe&DBE_ALARM) {
mapStatus(meta, pv.status.get(), pv.message.get());
pv.severity->put(meta.severity);
}
}
void putValue(dbChannel *chan, pvd::PVScalar* value, db_field_log *pfl)
{
dbrbuf buf;
long nReq = 1;
long status = dbChannelGet(chan, dbChannelFinalFieldType(chan), &buf, NULL, &nReq, pfl);
if(status)
throw std::runtime_error("dbGet for meta fails");
if(nReq==0) {
// this was an actual max length 1 array, which has zero elements now.
memset(&buf, 0, sizeof(buf));
}
switch(dbChannelFinalFieldType(chan)) {
#define CASE(BASETYPE, PVATYPE, DBFTYPE, PVACODE) case DBR_##DBFTYPE: value->putFrom<PVATYPE>(buf.dbf_##DBFTYPE); break;
#define CASE_ENUM
#define CASE_SKIP_BOOL
#include "pv/typemap.h"
#undef CASE_ENUM
#undef CASE_SKIP_BOOL
#undef CASE
case DBR_STRING:
buf.dbf_STRING[sizeof(buf.dbf_STRING)-1] = '\0';
value->putFrom<std::string>(buf.dbf_STRING);
break;
default:
throw std::runtime_error("putValue unsupported DBR code");
}
}
void getValue(dbChannel *chan, pvd::PVScalar* value)
{
dbrbuf buf;
switch(dbChannelFinalFieldType(chan)) {
#define CASE(BASETYPE, PVATYPE, DBFTYPE, PVACODE) case DBR_##DBFTYPE: buf.dbf_##DBFTYPE = value->getAs<PVATYPE>(); break;
#define CASE_ENUM
#define CASE_SKIP_BOOL
#include "pv/typemap.h"
#undef CASE_ENUM
#undef CASE_SKIP_BOOL
#undef CASE
case DBR_STRING:
{
std::string val(value->getAs<std::string>());
strncpy(buf.dbf_STRING, val.c_str(), sizeof(buf.dbf_STRING));
buf.dbf_STRING[sizeof(buf.dbf_STRING)-1] = '\0';
}
break;
default:
throw std::runtime_error("getValue unsupported DBR code");
}
long status = dbChannelPut(chan, dbChannelFinalFieldType(chan), &buf, 1);
if(status)
throw std::runtime_error("dbPut for meta fails");
}
void getValue(dbChannel *chan, pvd::PVScalarArray* value)
{
short dbr = dbChannelFinalFieldType(chan);
if(dbr!=DBR_STRING) {
pvd::shared_vector<const void> buf;
value->getAs(buf);
long nReq = buf.size()/pvd::ScalarTypeFunc::elementSize(value->getScalarArray()->getElementType());
long status = dbChannelPut(chan, dbr, buf.data(), nReq);
if(status)
throw std::runtime_error("dbChannelPut fails");
} else {
pvd::shared_vector<const std::string> buf;
value->getAs(buf);
std::vector<char> temp(buf.size()*MAX_STRING_SIZE);
for(size_t i=0, N=buf.size(); i<N; i++)
{
strncpy(&temp[i*MAX_STRING_SIZE], buf[i].c_str(), MAX_STRING_SIZE-1);
temp[i*MAX_STRING_SIZE + MAX_STRING_SIZE-1] = '\0';
}
long status = dbChannelPut(chan, dbr, &temp[0], buf.size());
if(status)
throw std::runtime_error("dbChannelPut fails");
}
}
void putValue(dbChannel *chan, pvd::PVScalarArray* value, db_field_log *pfl)
{
const short dbr = dbChannelFinalFieldType(chan);
long nReq = dbChannelFinalElements(chan);
const pvd::ScalarType etype = value->getScalarArray()->getElementType();
if(dbr!=DBR_STRING) {
pvd::shared_vector<void> buf(pvd::ScalarTypeFunc::allocArray(etype, nReq)); // TODO: pool?
long status = dbChannelGet(chan, dbr, buf.data(), NULL, &nReq, pfl);
if(status)
throw std::runtime_error("dbChannelGet for value fails");
buf.slice(0, nReq*pvd::ScalarTypeFunc::elementSize(etype));
value->putFrom(pvd::freeze(buf));
} else {
std::vector<char> temp(nReq*MAX_STRING_SIZE);
long status = dbChannelGet(chan, dbr, &temp[0], NULL, &nReq, pfl);
if(status)
throw std::runtime_error("dbChannelGet for value fails");
pvd::shared_vector<std::string> buf(nReq);
for(long i=0; i<nReq; i++) {
temp[i*MAX_STRING_SIZE + MAX_STRING_SIZE-1] = '\0';
buf[i] = std::string(&temp[i*MAX_STRING_SIZE]);
}
value->putFrom(pvd::freeze(buf));
}
}
template<typename META>
void putMeta(const pvCommon& pv, unsigned dbe, db_field_log *pfl)
{
META meta;
long options = (int)META::mask, nReq = 0;
dbCommon *prec = dbChannelRecord(pv.chan);
long status = dbChannelGet(pv.chan, dbChannelFinalFieldType(pv.chan), &meta, &options, &nReq, pfl);
if(status)
throw std::runtime_error("dbGet for meta fails");
putMetaImpl(pv, meta);
#define FMAP(MNAME, FNAME) pv.MNAME->put(meta.FNAME)
if(dbe&DBE_ALARM) {
mapStatus(meta, pv.status.get(), pv.message.get());
FMAP(severity, severity);
}
if(dbe&DBE_PROPERTY) {
#undef FMAP
if(pv.desc) pv.desc->put(prec->desc);
#define FMAP(MASK, MNAME, FNAME) if(META::mask&(MASK) && pv.MNAME) pv.MNAME->put(meta.FNAME)
FMAP(DBR_GR_DOUBLE, displayHigh, upper_disp_limit);
FMAP(DBR_GR_DOUBLE, displayLow, lower_disp_limit);
FMAP(DBR_CTRL_DOUBLE, controlHigh, upper_ctrl_limit);
FMAP(DBR_CTRL_DOUBLE, controlLow, lower_ctrl_limit);
FMAP(DBR_GR_DOUBLE, egu, units);
#undef FMAP
if(META::mask&DBR_PRECISION && pv.prec) {
pv.prec->put(pvd::int32(meta.precision.dp));
}
#define FMAP(MASK, MNAME, FNAME) if(META::mask&(MASK) && pv.MNAME) pv.MNAME->putFrom(meta.FNAME)
// not handling precision until I get a better idea of what 'format' is supposed to be...
//FMAP(prec, PVScalar, "display.form", PROPERTY);
FMAP(DBR_AL_DOUBLE, warnHigh, upper_warning_limit);
FMAP(DBR_AL_DOUBLE, warnLow, lower_warning_limit);
FMAP(DBR_AL_DOUBLE, alarmHigh, upper_alarm_limit);
FMAP(DBR_AL_DOUBLE, alarmLow, lower_alarm_limit);
#undef FMAP
if(pv.enumopts) {
pvd::shared_vector<std::string> strs(meta.no_str);
for(size_t i=0; i<strs.size(); i++)
{
meta.strs[i][sizeof(meta.strs[i])-1] = '\0';
strs[i] = meta.strs[i];
}
pv.enumopts->replace(pvd::freeze(strs));
}
}
}
template<typename PVC, typename META>
void putAll(const PVC &pv, unsigned dbe, db_field_log *pfl)
{
if(dbe&(DBE_VALUE|DBE_ARCHIVE)) {
putValue(pv.chan, pv.value.get(), pfl);
}
if(!(dbe&DBE_PROPERTY)) {
putTime(pv, dbe, pfl);
} else {
putMeta<META>(pv, dbe, pfl);
}
}
void findNSMask(pvTimeAlarm& pvmeta, pdbRecordIterator& info, const epics::pvData::PVStructurePtr& pvalue)
{
const char *UT = info.info("Q:time:tag");
if(UT && strncmp(UT, "nsec:lsb:", 9)==0) {
try{
pvmeta.nsecMask = epics::pvData::castUnsafe<pvd::uint32>(std::string(&UT[9]));
}catch(std::exception& e){
pvmeta.nsecMask = 0;
std::cerr<<info.name()<<" : Q:time:tag nsec:lsb: requires a number not '"<<UT[9]<<"'\n";
}
}
if(pvmeta.nsecMask>0 && pvmeta.nsecMask<=32) {
pvmeta.userTag = pvalue->getSubField<pvd::PVInt>("timeStamp.userTag");
if(!pvmeta.userTag) {
pvmeta.nsecMask = 0; // struct doesn't have userTag
} else {
pvd::uint64 mask = (1<<pvmeta.nsecMask)-1;
pvmeta.nsecMask = mask;
pvmeta.maskALWAYS.set(pvmeta.userTag->getFieldOffset());
}
} else
pvmeta.nsecMask = 0;
}
void findFormat(pvTimeAlarm& pvmeta, pdbRecordIterator& info, const epics::pvData::PVStructurePtr& pvalue)
{
const char *FMT = info.info("Q:form");
if(FMT) {
pvd::PVScalarPtr fmt(pvalue->getSubField<pvd::PVScalar>("display.form.index"));
if(fmt) {
bool found = false;
for(size_t i=0; !found && i<displayForms.size(); i++) {
if((found=(displayForms[i]==FMT)))
fmt->putFrom<pvd::uint32>(i);
}
if(!found) {
try {
fmt->putFrom(std::string(FMT)); // attempt to parse as number
}catch(std::exception& e){
errlogPrintf("%s: info(Q:form, \"%s\") is not known format: %s\n", info.name(), FMT, e.what());
}
}
}
}
}
pvd::Status checkDISP(dbChannel *chan)
{
dbCommon *prec = dbChannelRecord(chan);
pvd::Status ret;
if(prec->disp && dbChannelField(chan)!=&prec->disp)
ret = pvd::Status::error("Put Disabled");
return ret;
}
template<typename PVX, typename META>
struct PVIFScalarNumeric : public PVIF
{
PVX pvmeta;
const epics::pvData::PVStructurePtr pvalue;
PVIFScalarNumeric(dbChannel *ch, const epics::pvData::PVFieldPtr& p, pvd::PVField *enclosing)
:PVIF(ch)
,pvalue(std::tr1::dynamic_pointer_cast<pvd::PVStructure>(p))
{
if(!pvalue)
throw std::runtime_error("Must attach to structure");
pvmeta.chan = ch;
attachAll<PVX>(pvmeta, pvalue);
if(enclosing) {
size_t bit = enclosing->getFieldOffset();
// we are inside a structure array or similar with only one bit for all ours fields
pvmeta.maskALWAYS.clear();
pvmeta.maskALWAYS.set(bit);
pvmeta.maskVALUE.clear();
pvmeta.maskVALUE.set(bit);
pvmeta.maskALARM.clear();
pvmeta.maskALARM.set(bit);
pvmeta.maskPROPERTY.clear();
pvmeta.maskPROPERTY.set(bit);
pvmeta.maskVALUEPut.clear();
pvmeta.maskVALUEPut.set(0);
pvmeta.maskVALUEPut.set(bit);
}
pdbRecordIterator info(chan);
findNSMask(pvmeta, info, pvalue);
findFormat(pvmeta, info, pvalue);
}
virtual ~PVIFScalarNumeric() {}
virtual void put(epics::pvData::BitSet& mask, unsigned dbe, db_field_log *pfl) OVERRIDE FINAL
{
try{
putAll<PVX, META>(pvmeta, dbe, pfl);
mask |= pvmeta.maskALWAYS;
if(dbe&(DBE_VALUE|DBE_ARCHIVE))
mask |= pvmeta.maskVALUE;
if(dbe&DBE_ALARM)
mask |= pvmeta.maskALARM;
if(dbe&DBE_PROPERTY)
mask |= pvmeta.maskPROPERTY;
}catch(...){
pvmeta.severity->put(3);
mask |= pvmeta.maskALARM;
throw;
}
}
virtual pvd::Status get(const epics::pvData::BitSet& mask, proc_t proc, bool permit) OVERRIDE FINAL
{
pvd::Status ret = checkDISP(chan);
if(!ret)
return ret;
bool newval = mask.logical_and(pvmeta.maskVALUEPut);
if(newval) {
if(permit)
getValue(pvmeta.chan, pvmeta.value.get());
else
ret = pvd::Status::error("Put not permitted");
}
if(newval || proc==PVIF::ProcForce) {
if(permit)
ret = PVIF::get(mask, proc);
else
ret = pvd::Status::error("Process not permitted");
}
return ret;
}
virtual unsigned dbe(const epics::pvData::BitSet& mask) OVERRIDE FINAL
{
unsigned ret = 0;
if(mask.logical_and(pvmeta.maskVALUE))
ret |= DBE_VALUE;
if(mask.logical_and(pvmeta.maskALARM))
ret |= DBE_ALARM;
if(mask.logical_and(pvmeta.maskPROPERTY))
ret |= DBE_PROPERTY;
return ret;
}
};
} // namespace
static
pvd::ScalarType DBR2PVD(short dbr)
{
switch(dbr) {
#define CASE(BASETYPE, PVATYPE, DBFTYPE, PVACODE) case DBR_##DBFTYPE: return pvd::pv##PVACODE;
#define CASE_ENUM
#define CASE_SKIP_BOOL
#include "pv/typemap.h"
#undef CASE_ENUM
#undef CASE_SKIP_BOOL
#undef CASE
case DBF_STRING: return pvd::pvString;
}
throw std::invalid_argument("Unsupported DBR code");
}
short PVD2DBR(pvd::ScalarType pvt)
{
switch(pvt) {
#define CASE(BASETYPE, PVATYPE, DBFTYPE, PVACODE) case pvd::pv##PVACODE: return DBR_##DBFTYPE;
#ifndef USE_INT64
# define CASE_SQUEEZE_INT64
#endif
#include "pv/typemap.h"
#ifndef USE_INT64
# undef CASE_SQUEEZE_INT64
#endif
#undef CASE
case pvd::pvString: return DBF_STRING;
}
return -1;
}
static
pvd::StructureConstPtr buildTimeStamp()
{
return pvd::FieldBuilder::begin()
->add("secondsPastEpoch", pvd::pvLong)
->add("nanoseconds", pvd::pvInt)
->add("userTag", pvd::pvInt)
->createStructure();
}
epics::pvData::FieldConstPtr
ScalarBuilder::dtype()
{
if(!channel)
throw std::runtime_error("+type:\"scalar\" requires +channel:");
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", buildTimeStamp());
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();
}
PVIF*
ScalarBuilder::attach(const epics::pvData::PVStructurePtr& root, const FieldName& fldname)
{
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");
}
namespace {
template<class PVD>
struct PVIFPlain : public PVIF
{
const typename PVD::shared_pointer field;
size_t fieldOffset;
dbChannel * const channel;
PVIFPlain(dbChannel *channel, const epics::pvData::PVFieldPtr& fld, epics::pvData::PVField* enclosing=0)
:PVIF(channel)
,field(std::tr1::static_pointer_cast<PVD>(fld))
,channel(channel)
{
if(!field)
throw std::logic_error("PVIFPlain attached type mis-match");
if(enclosing)
fieldOffset = enclosing->getFieldOffset();
else
fieldOffset = field->getFieldOffset();
}
virtual ~PVIFPlain() {}
virtual void put(epics::pvData::BitSet& mask, unsigned dbe, db_field_log *pfl) OVERRIDE FINAL
{
if(dbe&DBE_VALUE) {
putValue(channel, field.get(), pfl);
mask.set(fieldOffset);
}
}
virtual pvd::Status get(const epics::pvData::BitSet& mask, proc_t proc, bool permit) OVERRIDE FINAL
{
pvd::Status ret = checkDISP(chan);
if(!ret)
return ret;
bool newval = mask.get(fieldOffset);
if(newval) {
if(permit)
getValue(channel, field.get());
else
ret = pvd::Status::error("Put not permitted");
}
if(newval || proc==PVIF::ProcForce) {
if(permit)
ret = PVIF::get(mask, proc);
else
ret = pvd::Status::error("Process not permitted");
}
return ret;
}
virtual unsigned dbe(const epics::pvData::BitSet& mask) OVERRIDE FINAL
{
// TODO: figure out how to handle various intermidiate compressed
// bitSet and enclosing.
// Until then check only also for wildcard bit (0).
if(mask.get(fieldOffset) || mask.get(0))
return DBE_VALUE;
return 0;
}
};
struct PlainBuilder : public PVIFBuilder
{
explicit PlainBuilder(dbChannel* chan) :PVIFBuilder(chan) {}
virtual ~PlainBuilder() {}
// fetch the structure description
virtual epics::pvData::FieldConstPtr dtype() OVERRIDE FINAL {
if(!channel)
throw std::runtime_error("+type:\"plain\" requires +channel:");
const short dbr = dbChannelFinalFieldType(channel);
const long maxelem = dbChannelFinalElements(channel);