HashTable changes

- make table power-of-two, but since it seems to give 1-2% performance
  improvement, maybe forget it too.

- remove two-argument form of hashing classes and do the modulus direclty
  within HashTable instead. This simplifies things a fair bit.

- migrate Hash<void*> from db/dlLibrary to primitives/hashes/Hash

src/OpenFOAM/primitives/strings/string/string.H

@@ -89,9 +89,10 @@ public:
     class hash
     {
     public:
-        inline hash();
+        hash()
+        {}
+
         inline size_type operator()(const string&) const;
-        inline size_type operator()(const string&, const size_type) const;
     };
 
 

src/OpenFOAM/primitives/strings/string/stringI.H

@@ -196,10 +196,6 @@ inline Foam::string Foam::string::operator()(const size_type n) const
 }
 
 
-inline Foam::string::hash::hash()
-{}
-
-
 inline Foam::string::size_type Foam::string::hash::operator()
 (
     const string& key
@@ -216,14 +212,4 @@ inline Foam::string::size_type Foam::string::hash::operator()
 }
 
 
-inline Foam::string::size_type Foam::string::hash::operator()
-(
-    const string& key,
-    const size_type tableSize
-) const
-{
-    return ::abs(operator()(key)) % tableSize;
-}
-
-
 // ************************************************************************* //