Added conversion of zero-sized zones

applications/utilities/miscellaneous/foamFormatConvert/foamFormatConvert.C

@@ -31,6 +31,14 @@ Description
 
     Mainly used to convert binary mesh/field files to ASCII.
 
+    Problem: any zero-size List written binary gets written as '0'. When
+    reading the file as a dictionary this is interpreted as a label. This
+    is (usually) not a problem when doing patch fields since these get the
+    'uniform', 'nonuniform' prefix. However zone contents are labelLists
+    not labelFields and these go wrong. For now hacked a solution where
+    we detect the keywords in zones and redo the dictionary entries
+    to be labelLists.
+
 \*---------------------------------------------------------------------------*/
 
 #include "argList.H"
@@ -56,6 +64,82 @@ namespace Foam
 }
 
 
+// Hack to do zones which have Lists in them. See above.
+bool writeZones(const word& name, Time& runTime)
+{
+    IOobject io
+    (
+        name,
+        runTime.timeName(),
+        polyMesh::meshSubDir,
+        runTime,
+        IOobject::MUST_READ,
+        IOobject::NO_WRITE,
+        false
+    );
+
+    bool writeOk = false;
+
+    if (io.headerOk())
+    {
+        Info<< "        Reading " << io.headerClassName()
+            << " : " << name << endl;
+
+        // Switch off type checking (for reading e.g. faceZones as
+        // generic list of dictionaries).
+        const word oldTypeName = IOPtrList<entry>::typeName;
+        const_cast<word&>(IOPtrList<entry>::typeName) = word::null;
+
+        IOPtrList<entry> meshObject(io);
+
+        forAll(meshObject, i)
+        {
+            if (meshObject[i].isDict())
+            {
+                dictionary& d = meshObject[i].dict();
+
+                if (d.found("faceLabels"))
+                {
+                    d.set("faceLabels", labelList(d.lookup("faceLabels")));
+                }
+
+                if (d.found("flipMap"))
+                {
+                    d.set("flipMap", boolList(d.lookup("flipMap")));
+                }
+
+                if (d.found("cellLabels"))
+                {
+                    d.set("cellLabels", labelList(d.lookup("cellLabels")));
+                }
+
+                if (d.found("pointLabels"))
+                {
+                    d.set("pointLabels", labelList(d.lookup("pointLabels")));
+                }
+            }
+        }
+
+        const_cast<word&>(IOPtrList<entry>::typeName) = oldTypeName;
+        // Fake type back to what was in field
+        const_cast<word&>(meshObject.type()) = io.headerClassName();
+
+        Info<< "        Writing " << name << endl;
+
+        // Force writing as ascii
+        writeOk = meshObject.regIOobject::writeObject
+        (
+            IOstream::ASCII,
+            IOstream::currentVersion,
+            runTime.writeCompression()
+        );
+    }
+
+    return writeOk;
+}
+
+
+
 // Main program:
 
 int main(int argc, char *argv[])
@@ -76,9 +160,19 @@ int main(int argc, char *argv[])
         writeMeshObject<labelIOList>("neighbour", runTime);
         writeMeshObject<faceIOList>("faces", runTime);
         writeMeshObject<pointIOField>("points", runTime);
-        writeMeshObject<IOPtrList<entry> >("cellZones", runTime);
+        writeMeshObject<labelIOList>("pointProcAddressing", runTime);
-        writeMeshObject<IOPtrList<entry> >("faceZones", runTime);
+        writeMeshObject<labelIOList>("faceProcAddressing", runTime);
-        writeMeshObject<IOPtrList<entry> >("pointZones", runTime);
+        writeMeshObject<labelIOList>("cellProcAddressing", runTime);
+        writeMeshObject<labelIOList>("boundaryProcAddressing", runTime);
+
+        if (runTime.writeFormat() == IOstream::ASCII)
+        {
+            // Only do zones when converting from binary to ascii
+            // The other way gives problems since working on dictionary level.
+            writeZones("cellZones", runTime);
+            writeZones("faceZones", runTime);
+            writeZones("pointZones", runTime);
+        }
 
         // Get list of objects from the database
         IOobjectList objects(runTime, runTime.timeName());