Added dated version (20141009) for latest html documentation.

.hgtags

@@ -2,3 +2,8 @@ b9a943e6828731a8a89e811818b2d91faff69d86 1.0-BETA
 aaa5f5840b7eea8afaafb4d13a49bf78975aac0f 4.0.0
 aaa5f5840b7eea8afaafb4d13a49bf78975aac0f 4.0.0
 df4c65e13c2cfaa92e42f84a7afc97c81b5f3888 4.0.0
+df4c65e13c2cfaa92e42f84a7afc97c81b5f3888 4.0.0
+ec29bda853f50fa501cbcf3ffd836a1ef2adcdd4 4.0.0
+0daade17a7440f970750db4a8388e0cee2d04f17 4.0.1
+0daade17a7440f970750db4a8388e0cee2d04f17 4.0.1
+1c140dd0e1993ac0a2798e8148b90ccce44ad407 4.0.1

configure/CONFIG_SITE

@@ -32,6 +32,6 @@ endif
 INSTALL_INCLUDE = $(INSTALL_LOCATION)/include/pv
 USR_INCLUDES += -I $(INSTALL_LOCATION)/include
 
+-include $(TOP)/../CONFIG_SITE.local
 -include $(TOP)/configure/CONFIG_SITE.local
--include $(TOP)/../CONFIG.local
 

documentation/ntCPP.html

@@ -46,16 +46,16 @@
     </dd>
     <dt>This version:</dt>
     <dd><a
-      href="ntCPP_20140919.html">ntCPP_20140919.html</a>
+      href="ntCPP_20141009.html">ntCPP_20141009.html</a>
     </dd>
     <dt>Previous version:</dt>
     <dd><a
-      href="ntCPP_20140723.html">ntCPP_20140723.html</a>
+      href="ntCPP_20140919.html">ntCPP_20140919.html</a>
     </dd>
     <dt>Editors:</dt>
    <dd> Marty Kraimer, BNL<br />
       Matej Sekoranja, CosyLab<br />
-      David Hicken, Diamond Light Source
+      David Hickin, Diamond Light Source
       </dd>
   </dl>
 
@@ -125,7 +125,7 @@ pvDataCPP.html
       A primary use of this type is to access data from a set of pvAccess channels.
       Each element of value holds data from a channel.</dd>
   <dt>NTNDArray</dt>
-     <dd>This type holds NDArray data as defined by the areaDetector facilility.
+     <dd>This type holds NDArray data as defined by the areaDetector facility.
      </dd>
 </dl>
 <p>Each normative type consists of a set of mandatory fields, a set of optional fields,
@@ -243,7 +243,7 @@ An alarm field attached to the top level structure can be used for either:
 <p>If alarms do appear at multiple levels then an alarm is always
 provided at the top level.
 It uses "maximize severity" to report the highest level severity
-of all alarms, i. e. the top level severity is the maximum severity
+of all alarms, i.e. the top level severity is the maximum severity
 of all the alarms.</p>
 <p>An example is:</p>
 <pre>
@@ -343,8 +343,8 @@ structure display
     string format
     string units
 </pre>
-<p>Note that the format should be a simplifed version of the standard
-C formattimg conventions.</p>
+<p>Note that the format should be a simplified version of the standard
+C formatting conventions.</p>
 <h3>enumerated</h3>
 <p>This is used to specify a set of choices and an index that selects one
 of the choices.
@@ -403,7 +403,7 @@ PVData can be used to generate a valueAlarm field as an extra field.
         For example <b>NTScalar</b>
       </dd>
 </dl>
-<p>Each bulder also has a number of additional methods for optional fields
+<p>Each builder also has a number of additional methods for optional fields
 and a method to add extra fields.</p>
 <h3>Normative Type Class</h3>
 <p>
@@ -840,9 +840,9 @@ where
 <pre>
 epics:nt/NTNameValue:1.0
     string[] name                 // mandatory
-    double[] value                // madatory, can be any type, must be same length as name
-    string descriptor              // optional
-    alarm_t alarm                  // optional
+    double[] value                // mandatory, can be any type, must be same length as name
+    string descriptor             // optional
+    alarm_t alarm                 // optional
         int severity
         int status
         string message
@@ -980,7 +980,7 @@ where
 <pre>
 epics:nt/NTTable:1.0 
     string[] labels [column0,column1,column2]    // mandatory
-    structure value                              // mandatory; 
+    structure value                              // mandatory
         double[] column0 []                      // name=labels[0]; can be any scalar type
         string[] column1 []                      // name=labels[1]; can be any scalar type
         int[] column2 []                         // name=labels[2]; can be any scalar type
@@ -1121,14 +1121,14 @@ where
 structure NTMultiChannel
   union_t[] value            // mandatory
   string[]  channelName      // mandatory; must be same length as value
-  time_t    timeStamp        //optional; time when data collected
-  alarm_t   alarm            //optional; alarm associated with data collection
-  int[]     severity         //optional; alarm severity for each value
-  int[]     status           //optional; alarm status for each value
-  string[]  message          //optional; alarm message for each value
-  long[]    secondsPastEpoch //optional; seconds for each value.
-  int[]     nanoseconds      //optional; nanoseconds for each value
-  string    descriptor       //optional; descriptor data
+  time_t    timeStamp        // optional; time when data collected
+  alarm_t   alarm            // optional; alarm associated with data collection
+  int[]     severity         // optional; alarm severity for each value
+  int[]     status           // optional; alarm status for each value
+  string[]  message          // optional; alarm message for each value
+  long[]    secondsPastEpoch // optional; seconds for each value.
+  int[]     nanoseconds      // optional; nanoseconds for each value
+  string    descriptor       // optional; descriptor data
 </pre>
 <h3>NTMultiChannelBuilder</h3>
 <p><b>ntmultiChannel.h</b> defines the following:</p>
@@ -1292,13 +1292,13 @@ where
 <h2>Normative Type NTNDArray</h2> 
 <pre>
 epics:nt/NTNDArray:1.0 
-    union value                                 //mandatory
-    codec_t codec                               //mandatory
+    union value                                 // mandatory
+    codec_t codec                               // mandatory
         string name 
         any parameters
-    long compressedSize                         //mandatory
-    long uncompressedSize                       //mandatory
-    dimension_t[] dimension                     //mandatory
+    long compressedSize                         // mandatory
+    long uncompressedSize                       // mandatory
+    dimension_t[] dimension                     // mandatory
         dimension_t[]
             dimension_t
                 int size
@@ -1306,12 +1306,12 @@ epics:nt/NTNDArray:1.0
                 int fullSize
                 int binning
                 boolean reverse
-    int uniqueId                                //mandatory
-    time_t dataTimeStamp                        //mandatory
+    int uniqueId                                // mandatory
+    time_t dataTimeStamp                        // mandatory
         long secondsPastEpoch
         int nanoseconds
         int userTag
-    epics:nt/NTAttribute:1.0[] attribute //mandatory
+    epics:nt/NTAttribute:1.0[] attribute        // mandatory
         epics:nt/NTAttribute:1.0[]
             epics:nt/NTAttribute:1.0
                 string name
@@ -1334,7 +1334,7 @@ epics:nt/NTNDArray:1.0
         string description 
         string format 
         string units 
-    string extra1                               //extra
+    string extra1                               // extra
 </pre>
 <h3>NTNDArrayBuilder</h3>
 <p><b>ntndArray.h</b> defines the following:</p>

documentation/ntCPP_20140919.html

@@ -55,7 +55,7 @@
     <dt>Editors:</dt>
    <dd> Marty Kraimer, BNL<br />
       Matej Sekoranja, CosyLab<br />
-      David Hicken, Diamond Light Source
+      David Hickin, Diamond Light Source
       </dd>
   </dl>
 
@@ -125,7 +125,7 @@ pvDataCPP.html
       A primary use of this type is to access data from a set of pvAccess channels.
       Each element of value holds data from a channel.</dd>
   <dt>NTNDArray</dt>
-     <dd>This type holds NDArray data as defined by the areaDetector facilility.
+     <dd>This type holds NDArray data as defined by the areaDetector facility.
      </dd>
 </dl>
 <p>Each normative type consists of a set of mandatory fields, a set of optional fields,

src/Makefile

@@ -6,6 +6,7 @@ SRC = $(TOP)/src/
 SRC_DIRS += $(SRC)/nt
 
 INC += nt.h
+INC += ntutils.h
 INC += ntfield.h
 INC += ntscalar.h
 INC += ntscalarArray.h
@@ -14,6 +15,7 @@ INC += nttable.h
 INC += ntmultiChannel.h
 INC += ntndarray.h
 
+LIBSRCS += ntutils.cpp
 LIBSRCS += ntfield.cpp
 LIBSRCS += ntscalar.cpp
 LIBSRCS += ntscalarArray.cpp

src/nt/nt.h

@@ -7,6 +7,9 @@
 #ifndef NT_H
 #define NT_H
 
+/*
+ * Include all the normative types here.
+ */
 #include <pv/ntfield.h>
 #include <pv/ntscalar.h>
 #include <pv/ntscalarArray.h>

src/nt/ntfield.cpp

@@ -6,11 +6,14 @@
  */
 
 #include <pv/lock.h>
+
+#define epicsExportSharedSymbols
 #include <pv/ntfield.h>
 
+using namespace epics::pvData;
 using std::tr1::static_pointer_cast;
 
-namespace epics { namespace pvData { 
+namespace epics { namespace nt {
 
 NTFieldPtr NTField::get()
 {

src/nt/ntfield.h

@@ -9,6 +9,11 @@
 
 #include <cstdarg>
 
+#ifdef epicsExportSharedSymbols
+#   define ntfieldEpicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
+#endif
+
 #include <pv/standardField.h>
 #include <pv/standardPVField.h>
 #include <pv/alarm.h>
@@ -17,7 +22,14 @@
 #include <pv/pvTimeStamp.h>
 #include <pv/sharedVector.h>
 
-namespace epics { namespace pvData { 
+#ifdef ntfieldEpicsExportSharedSymbols
+#   define epicsExportSharedSymbols
+#	undef ntfieldEpicsExportSharedSymbols
+#endif
+
+#include <shareLib.h>
+
+namespace epics { namespace nt {
 /**
  * Convenience Class for introspection fields of a Normative Type
  * @author mrk
@@ -30,7 +42,7 @@ typedef std::tr1::shared_ptr<NTField> NTFieldPtr;
 class PVNTField;
 typedef std::tr1::shared_ptr<PVNTField> PVNTFieldPtr;
 
-class NTField {
+class epicsShareClass NTField {
 public:
     POINTER_DEFINITIONS(NTField);
     /**
@@ -47,83 +59,83 @@ public:
      * @param field The field to test.
      * @return (false,true) if field (is not,is) an enumerated structure.
      */
-    bool isEnumerated(FieldConstPtr const & field);
+    bool isEnumerated(epics::pvData::FieldConstPtr const & field);
     /**
      * Is field a timeStamp structure.
      * @param field The field to test.
      * @return (false,true) if field (is not,is) a timeStamp structure.
      */
-    bool isTimeStamp(FieldConstPtr const & field);
+    bool isTimeStamp(epics::pvData::FieldConstPtr const & field);
     /**
      * Is field an alarm structure.
      * @param field The field to test.
      * @return (false,true) if field (is not,is) an alarm structure.
      */
-    bool isAlarm(FieldConstPtr const & field);
+    bool isAlarm(epics::pvData::FieldConstPtr const & field);
     /**
      * Is field a display structure.
      * @param field The field to test.
      * @return (false,true) if field (is not,is) a display structure.
      */
-    bool isDisplay(FieldConstPtr const & field);
+    bool isDisplay(epics::pvData::FieldConstPtr const & field);
     /**
      * Is field an alarmLimit structure.
      * @param field The field to test.
      * @return (false,true) if field (is not,is) an alarmLimit structure.
      */
-    bool isAlarmLimit(FieldConstPtr const & field);
+    bool isAlarmLimit(epics::pvData::FieldConstPtr const & field);
     /**
      * Is field a control structure.
      * @param field The field to test.
      * @return (false,true) if field (is not,is) a control structure.
      */
-    bool isControl(FieldConstPtr const & field);
+    bool isControl(epics::pvData::FieldConstPtr const & field);
 
     /**
      * Create an enumerated structure.
      * @return an enumerated structure.
      */
-    StructureConstPtr createEnumerated();
+    epics::pvData::StructureConstPtr createEnumerated();
     /**
      * Create a timeStamp structure.
      * @return a timeStamp structure.
      */
-    StructureConstPtr createTimeStamp();
+    epics::pvData::StructureConstPtr createTimeStamp();
     /**
      * Create an alarm structure.
      * @return an alarm structure.
      */
-    StructureConstPtr createAlarm();
+    epics::pvData::StructureConstPtr createAlarm();
     /**
      * Create a display structure.
      * @return a displayalarm structure.
      */
-    StructureConstPtr createDisplay();
+    epics::pvData::StructureConstPtr createDisplay();
     /**
      * Create a control structure.
      * @return a control structure.
      */
-    StructureConstPtr createControl();
+    epics::pvData::StructureConstPtr createControl();
 
     /**
      * Create an array of enumerated structures.
      * @return an array of enumerated structures.
      */
-    StructureArrayConstPtr createEnumeratedArray();
+    epics::pvData::StructureArrayConstPtr createEnumeratedArray();
     /**
      * Create an array of timeStamp structures.
      * @return an array of timeStamp structures.
      */
-    StructureArrayConstPtr createTimeStampArray();
+    epics::pvData::StructureArrayConstPtr createTimeStampArray();
     /**
      * Create an array of alarm structures.
      * @return an array of alarm structures.
      */
-    StructureArrayConstPtr createAlarmArray();
+    epics::pvData::StructureArrayConstPtr createAlarmArray();
 private:
     NTField();
-    FieldCreatePtr fieldCreate;
-    StandardFieldPtr standardField;
+    epics::pvData::FieldCreatePtr fieldCreate;
+    epics::pvData::StandardFieldPtr standardField;
 };
 
 /**
@@ -131,7 +143,7 @@ private:
  * @author mrk
  * 
  */
-class PVNTField {
+class epicsShareClass PVNTField {
 public:
     POINTER_DEFINITIONS(PVNTField);
     /**
@@ -148,54 +160,54 @@ public:
      * @param choices The array of choices.
      * @return an enumerated PVStructure..
      */
-    PVStructurePtr createEnumerated(
-        StringArray const & choices);
+    epics::pvData::PVStructurePtr createEnumerated(
+        epics::pvData::StringArray const & choices);
     /**
      * Create a timeStamp PVStructure.
      * @return a timeStamp PVStructure..
      */
-    PVStructurePtr createTimeStamp();
+    epics::pvData::PVStructurePtr createTimeStamp();
     /**
      * Create an alarm PVStructure.
      * @return an alarm PVStructure..
      */
-    PVStructurePtr createAlarm();
+    epics::pvData::PVStructurePtr createAlarm();
     /**
      * Create a display PVStructure.
      * @return a display PVStructure..
      */
-    PVStructurePtr createDisplay();
+    epics::pvData::PVStructurePtr createDisplay();
     /**
      * Create an alarmLimit PVStructure.
      * @return an alarmLimit PVStructure..
      */
-    PVStructurePtr createAlarmLimit();
+    epics::pvData::PVStructurePtr createAlarmLimit();
     /**
      * Create a control PVStructure.
      * @return a control PVStructure..
      */
-    PVStructurePtr createControl();
+    epics::pvData::PVStructurePtr createControl();
 
     /**
      * Create an enumerated PVStructureArray.
      * @return an enumerated PVStructureArray..
      */
-    PVStructureArrayPtr createEnumeratedArray();
+    epics::pvData::PVStructureArrayPtr createEnumeratedArray();
     /**
      * Create a timeStamp PVStructureArray.
      * @return a timeStamp PVStructureArray
      */
-    PVStructureArrayPtr createTimeStampArray();
+    epics::pvData::PVStructureArrayPtr createTimeStampArray();
     /**
      * Create an alarm PVStructureArray.
      * @return an alarm PVStructureArray..
      */
-    PVStructureArrayPtr createAlarmArray();
+    epics::pvData::PVStructureArrayPtr createAlarmArray();
 private:
     PVNTField();
-    PVDataCreatePtr pvDataCreate;
-    StandardFieldPtr standardField;
-    StandardPVFieldPtr standardPVField;
+    epics::pvData::PVDataCreatePtr pvDataCreate;
+    epics::pvData::StandardFieldPtr standardField;
+    epics::pvData::StandardPVFieldPtr standardPVField;
     NTFieldPtr ntstructureField;
 };
 

src/nt/ntmultiChannel.cpp

@@ -5,9 +5,12 @@
  * in file LICENSE that is included with this distribution.
  */
 
-#include <pv/ntmultiChannel.h>
 #include <algorithm>
 
+#define epicsExportSharedSymbols
+#include <pv/ntmultiChannel.h>
+#include <pv/ntutils.h>
+
 using namespace std;
 using namespace epics::pvData;
 
@@ -155,7 +158,7 @@ StructureConstPtr NTMultiChannelBuilder::createStructure()
     return st;
 }
 
-PVStructurePtr NTMultiChannelBuilder::NTMultiChannelBuilder::createPVStructure()
+PVStructurePtr NTMultiChannelBuilder::createPVStructure()
 {
     return pvDataCreate->createPVStructure(createStructure());
 }
@@ -210,7 +213,7 @@ NTMultiChannel::shared_pointer NTMultiChannel::wrapUnsafe(PVStructurePtr const &
 
 bool NTMultiChannel::is_a(StructureConstPtr const &structure)
 {
-    return structure->getID() == URI;
+    return NTUtils::is_a(structure->getID(), URI);
 }
 
 bool NTMultiChannel::isCompatible(PVStructurePtr const &pvStructure)

src/nt/ntmultiChannel.h

@@ -7,10 +7,26 @@
 #ifndef NTMULTICHANNEL_H
 #define NTMULTICHANNEL_H
 
-#include <pv/ntfield.h>
 #include <vector>
 #include <string>
 
+#ifdef epicsExportSharedSymbols
+#   define ntmultiChannelEpicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
+#endif
+
+#include <pv/pvDisplay.h>
+#include <pv/pvControl.h>
+
+#ifdef ntmultiChannelEpicsExportSharedSymbols
+#   define epicsExportSharedSymbols
+#	undef ntmultiChannelEpicsExportSharedSymbols
+#endif
+
+#include <pv/ntfield.h>
+
+#include <shareLib.h>
+
 
 namespace epics { namespace nt { 
 
@@ -140,7 +156,7 @@ namespace detail {
 typedef std::tr1::shared_ptr<detail::NTMultiChannelBuilder> NTMultiChannelBuilderPtr;
 
 
-class NTMultiChannel
+class epicsShareClass NTMultiChannel
 {
 public:
     POINTER_DEFINITIONS(NTMultiChannel);

src/nt/ntnameValue.cpp

@@ -5,7 +5,9 @@
  * in file LICENSE that is included with this distribution.
  */
 
+#define epicsExportSharedSymbols
 #include <pv/ntnameValue.h>
+#include <pv/ntutils.h>
 
 using namespace std;
 using namespace epics::pvData;
@@ -123,7 +125,7 @@ NTNameValue::shared_pointer NTNameValue::wrapUnsafe(PVStructurePtr const & struc
 
 bool NTNameValue::is_a(StructureConstPtr const & structure)
 {
-    return structure->getID() == URI;
+    return NTUtils::is_a(structure->getID(), URI);
 }
 
 bool NTNameValue::isCompatible(PVStructurePtr const & pvStructure)

src/nt/ntnameValue.h

@@ -7,8 +7,23 @@
 #ifndef NTNAMEVALUE_H
 #define NTNAMEVALUE_H
 
+#ifdef epicsExportSharedSymbols
+#   define ntnameValueEpicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
+#endif
+
+#include <pv/pvDisplay.h>
+#include <pv/pvControl.h>
+
+#ifdef ntnameValueEpicsExportSharedSymbols
+#   define epicsExportSharedSymbols
+#	undef ntnameValueEpicsExportSharedSymbols
+#endif
+
 #include <pv/ntfield.h>
 
+#include <shareLib.h>
+
 namespace epics { namespace nt {
 
 class NTNameValue;
@@ -111,7 +126,7 @@ typedef std::tr1::shared_ptr<detail::NTNameValueBuilder> NTNameValueBuilderPtr;
  * Convenience Class for NTNameValue
  * @author mrk
  */
-class NTNameValue
+class epicsShareClass NTNameValue
 {
 public:
     POINTER_DEFINITIONS(NTNameValue);

src/nt/ntndarray.cpp

@@ -7,7 +7,9 @@
 
 #include <algorithm>
 
+#define epicsExportSharedSymbols
 #include <pv/ntndarray.h>
+#include <pv/ntutils.h>
 
 using namespace std;
 using namespace epics::pvData;
@@ -217,7 +219,7 @@ NTNDArray::shared_pointer NTNDArray::wrapUnsafe(PVStructurePtr const & structure
 
 bool NTNDArray::is_a(StructureConstPtr const & structure)
 {
-    return structure->getID() == URI;
+    return NTUtils::is_a(structure->getID(), URI);
 }
 
 bool NTNDArray::isCompatible(PVStructurePtr const & pvStructure)

src/nt/ntndarray.h

@@ -7,11 +7,26 @@
 #ifndef NTNDARRAY_H
 #define NTNDARRAY_H
 
-#include <pv/ntfield.h>
-
 #include <vector>
 #include <string>
 
+#ifdef epicsExportSharedSymbols
+#   define ntscalarArrayEpicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
+#endif
+
+#include <pv/pvDisplay.h>
+#include <pv/pvControl.h>
+
+#ifdef ntscalarArrayEpicsExportSharedSymbols
+#   define epicsExportSharedSymbols
+#	undef ntscalarArrayEpicsExportSharedSymbols
+#endif
+
+#include <pv/ntfield.h>
+
+#include <shareLib.h>
+
 namespace epics { namespace nt {
 
 class NTNDArray;
@@ -108,7 +123,7 @@ typedef std::tr1::shared_ptr<detail::NTNDArrayBuilder> NTNDArrayBuilderPtr;
  * Convenience Class for NTNDArray
  * @author dgh
  */
-class NTNDArray
+class epicsShareClass NTNDArray
 {
 public:
     POINTER_DEFINITIONS(NTNDArray);

src/nt/ntscalar.cpp

@@ -5,7 +5,9 @@
  * in file LICENSE that is included with this distribution.
  */
 
+#define epicsExportSharedSymbols
 #include <pv/ntscalar.h>
+#include <pv/ntutils.h>
 
 using namespace std;
 using namespace epics::pvData;
@@ -143,7 +145,7 @@ NTScalar::shared_pointer NTScalar::wrapUnsafe(PVStructurePtr const & structure)
 
 bool NTScalar::is_a(StructureConstPtr const & structure)
 {
-    return structure->getID() == URI;
+    return NTUtils::is_a(structure->getID(), URI);
 }
 
 bool NTScalar::isCompatible(PVStructurePtr const & pvStructure)

src/nt/ntscalar.h

@@ -7,10 +7,23 @@
 #ifndef NTSCALAR_H
 #define NTSCALAR_H
 
-#include <pv/ntfield.h>
+#ifdef epicsExportSharedSymbols
+#   define ntscalarEpicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
+#endif
+
 #include <pv/pvDisplay.h>
 #include <pv/pvControl.h>
 
+#ifdef ntscalarEpicsExportSharedSymbols
+#   define epicsExportSharedSymbols
+#	undef ntscalarEpicsExportSharedSymbols
+#endif
+
+#include <pv/ntfield.h>
+
+#include <shareLib.h>
+
 namespace epics { namespace nt {
 
 class NTScalar;
@@ -126,7 +139,7 @@ typedef std::tr1::shared_ptr<detail::NTScalarBuilder> NTScalarBuilderPtr;
  * Convenience Class for NTScalar
  * @author mrk
  */
-class NTScalar
+class epicsShareClass NTScalar
 {
 public:
     POINTER_DEFINITIONS(NTScalar);

src/nt/ntscalarArray.cpp

@@ -5,7 +5,9 @@
  * in file LICENSE that is included with this distribution.
  */
 
+#define epicsExportSharedSymbols
 #include <pv/ntscalarArray.h>
+#include <pv/ntutils.h>
 
 using namespace std;
 using namespace epics::pvData;
@@ -140,7 +142,7 @@ NTScalarArray::shared_pointer NTScalarArray::wrapUnsafe(PVStructurePtr const & s
 
 bool NTScalarArray::is_a(StructureConstPtr const & structure)
 {
-    return structure->getID() == URI;
+    return NTUtils::is_a(structure->getID(), URI);
 }
 
 bool NTScalarArray::isCompatible(PVStructurePtr const & pvStructure)

src/nt/ntscalarArray.h

@@ -7,10 +7,24 @@
 #ifndef NTSCALARARRAY_H
 #define NTSCALARARRAY_H
 
-#include <pv/ntfield.h>
+#ifdef epicsExportSharedSymbols
+#   define ntscalarArrayEpicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
+#endif
+
 #include <pv/pvDisplay.h>
 #include <pv/pvControl.h>
 
+#ifdef ntscalarArrayEpicsExportSharedSymbols
+#   define epicsExportSharedSymbols
+#	undef ntscalarArrayEpicsExportSharedSymbols
+#endif
+
+#include <pv/ntfield.h>
+
+#include <shareLib.h>
+
+
 namespace epics { namespace nt {
 
 class NTScalarArray;
@@ -126,7 +140,7 @@ typedef std::tr1::shared_ptr<detail::NTScalarArrayBuilder> NTScalarArrayBuilderP
  * Convenience Class for NTScalarArray
  * @author mrk
  */
-class NTScalarArray
+class epicsShareClass NTScalarArray
 {
 public:
     POINTER_DEFINITIONS(NTScalarArray);

src/nt/nttable.cpp

@@ -7,7 +7,9 @@
 
 #include <algorithm>
 
+#define epicsExportSharedSymbols
 #include <pv/nttable.h>
+#include <pv/ntutils.h>
 
 using namespace std;
 using namespace epics::pvData;
@@ -138,7 +140,7 @@ NTTable::shared_pointer NTTable::wrapUnsafe(PVStructurePtr const & structure)
 
 bool NTTable::is_a(StructureConstPtr const & structure)
 {
-    return structure->getID() == URI;
+    return NTUtils::is_a(structure->getID(), URI);
 }
 
 bool NTTable::isCompatible(PVStructurePtr const & pvStructure)

src/nt/nttable.h

@@ -7,11 +7,26 @@
 #ifndef NTTABLE_H
 #define NTTABLE_H
 
-#include <pv/ntfield.h>
-
 #include <vector>
 #include <string>
 
+#ifdef epicsExportSharedSymbols
+#   define nttableEpicsExportSharedSymbols
+#   undef epicsExportSharedSymbols
+#endif
+
+#include <pv/pvDisplay.h>
+#include <pv/pvControl.h>
+
+#ifdef nttableEpicsExportSharedSymbols
+#   define epicsExportSharedSymbols
+#	undef nttableEpicsExportSharedSymbols
+#endif
+
+#include <pv/ntfield.h>
+
+#include <shareLib.h>
+
 namespace epics { namespace nt {
 
 class NTTable;
@@ -114,7 +129,7 @@ typedef std::tr1::shared_ptr<detail::NTTableBuilder> NTTableBuilderPtr;
  * Convenience Class for NTTable
  * @author mrk
  */
-class NTTable
+class epicsShareClass NTTable
 {
 public:
     POINTER_DEFINITIONS(NTTable);

src/nt/ntutils.cpp

@@ -0,0 +1,25 @@
+/* ntutils.cpp */
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvDataCPP is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+
+#define epicsExportSharedSymbols
+#include <pv/ntutils.h>
+
+using namespace std;
+
+namespace epics { namespace nt {
+
+bool NTUtils::is_a(const std::string &u1, const std::string &u2)
+{
+    // remove minor for the u2
+    size_t pos = u2.find_last_of('.');
+    std::string su2 = (pos == string::npos) ? u2 : u2.substr(0, pos);
+
+    // "starts with comparison"
+    return su2.size() <= u1.size() && u1.compare(0, su2.size(), su2) == 0;
+}
+
+}}

src/nt/ntutils.h

@@ -0,0 +1,39 @@
+/* ntutils.h */
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvDataCPP is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+#ifndef NTUTILS_H
+#define NTUTILS_H
+
+#include <string>
+#include <shareLib.h>
+
+namespace epics { namespace nt {
+
+/**
+ * Utility methods for NT types.
+ * @author mse
+ */
+class epicsShareClass NTUtils {
+public:
+
+    /**
+     * Checks whether NT types are compatible by checking their IDs,
+     * i.e. their names and major version must match.
+     * @param u1 the first uri.
+     * @param u2 the second uri.
+     * @return true of URIs are compatible, false otherwise.
+     */
+    static bool is_a(const std::string &u1, const std::string &u2);
+
+private:
+    // disable object creation
+    NTUtils() {}
+};
+
+}}
+
+#endif  /* NTUTILS_H */
+

test/nt/Makefile

@@ -32,6 +32,10 @@ TESTPROD_HOST += ntndarrayTest
 ntndarrayTest_SRCS = ntndarrayTest.cpp
 TESTS += ntndarrayTest
 
+TESTPROD_HOST += ntutilsTest
+ntutilsTest_SRCS = ntutilsTest.cpp
+TESTS += ntutilsTest
+
 TESTSCRIPTS_HOST += $(TESTS:%=%.t)
 
 include $(TOP)/configure/RULES

test/nt/ntfieldTest.cpp

@@ -15,6 +15,7 @@
 
 #include <pv/nt.h>
 
+using namespace epics::nt;
 using namespace epics::pvData;
 using std::string;
 using std::cout;

test/nt/ntmultiChannelTest.cpp

@@ -106,7 +106,7 @@ static void test()
     pvSeverity->replace(freeze(severities));
     if(debug) {cout << *pvStructure << endl;}
     PVBooleanArrayPtr pvIsConnected = multiChannel->getIsConnected();
-    shared_vector<const boolean> isConnected = pvIsConnected->view();
+    shared_vector<const epics::pvData::boolean> isConnected = pvIsConnected->view();
     multiChannel = builder->
             value(unionPtr) ->
             addDescriptor()->

test/nt/ntutilsTest.cpp

@@ -0,0 +1,36 @@
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvDataCPP is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+
+#include <epicsUnitTest.h>
+#include <testMain.h>
+
+#include <pv/ntutils.h>
+
+
+using namespace epics::nt;
+
+void test_is_a()
+{
+    testDiag("test_is_a");
+
+    testOk1(NTUtils::is_a("epics:nt/NTTable:1.0", "epics:nt/NTTable:1.0"));
+    testOk1(NTUtils::is_a("epics:nt/NTTable:2.0", "epics:nt/NTTable:2.0"));
+    testOk1(NTUtils::is_a("epics:nt/NTTable:1.0", "epics:nt/NTTable:1.1"));
+    testOk1(NTUtils::is_a("epics:nt/NTTable:1.1", "epics:nt/NTTable:1.0"));
+
+    testOk1(!NTUtils::is_a("epics:nt/NTTable:1.0", "epics:nt/NTTable:2.0"));
+    testOk1(!NTUtils::is_a("epics:nt/NTTable:2.0", "epics:nt/NTTable:1.0"));
+    testOk1(!NTUtils::is_a("epics:nt/NTTable:1.3", "epics:nt/NTTable:2.3"));
+    testOk1(!NTUtils::is_a("epics:nt/NTTable:1.0", "epics:nt/NTMatrix:1.0"));
+}
+
+MAIN(testNTUtils) {
+    testPlan(8);
+    test_is_a();
+    return testDone();
+}
+
+