Added patch access and regex search capabilities to the polyMeshGenFaces class

Signed-off-by: Philippose Rajan <sarith@rocketmail.com>

meshLibrary/utilities/meshes/polyMeshGen/polyMeshGenFaces.C

@@ -31,6 +31,7 @@ Description
 #include "IOobjectList.H"
 #include "faceSet.H"
 #include "demandDrivenData.H"
+#include "stringListOps.H"
 
 namespace Foam
 {
@@ -201,6 +202,51 @@ label polyMeshGenFaces::faceIsInPatch(const label faceLabel) const
     return -1;
 }
 
+wordList polyMeshGenFaces::patchNames() const
+{
+    wordList t(boundaries_.size());
+
+    forAll(boundaries_, patchI)
+    {
+        t[patchI] = boundaries_[patchI].patchName();
+    }
+
+    return t;
+}
+
+label polyMeshGenFaces::findPatchID(const word& patchName) const
+{
+    forAll(boundaries_, patchI)
+    {
+        if(boundaries_.set(patchI))
+        {
+            if(boundaries_[patchI].patchName() == patchName)
+            {
+                return patchI;
+            }
+        }
+    }
+
+    // If the code gets here, it implies that the patch was not found.
+    // return a -1 in this case
+    return -1;
+}
+
+labelList polyMeshGenFaces::findPatches(const word& patchName) const
+{
+    wordList allPatches = patchNames();
+
+    labelList patchIDs = findStrings(patchName, allPatches);
+
+    if(patchIDs.empty())
+    {
+        WarningIn("polyMeshGenFaces::findPatches(const word&)")
+            << "Cannot find any patch names matching " << patchName << endl;
+    }
+
+    return patchIDs;
+}
+
 label polyMeshGenFaces::addFaceSubset(const word& setName)
 {
     label id = faceSubsetIndex(setName);

meshLibrary/utilities/meshes/polyMeshGen/polyMeshGenFaces.H

@@ -142,7 +142,17 @@ public:
         
         //- return patch label for the given face label
         label faceIsInPatch(const label faceLabel) const;
-    
+
+        //- return list of patches in the boundary
+        wordList patchNames() const;
+
+        //- return the index of a patch given its name
+        label findPatchID(const word& patchName) const;
+        
+        //- return a list of patch indices corresponding to the given 
+        // name, expanding regular expressions
+        labelList findPatches(const word& patchName) const;
+
     // Subsets
     
         label addFaceSubset(const word&);