Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtinfo/DtMmdb/StyleSheet/VariableTable.C

@@ -0,0 +1,61 @@
+// $XConsortium: VariableTable.cc /main/3 1996/06/11 17:09:55 cde-hal $
+//
+#include "Types.h"
+#include "VariableTable.h"
+
+static unsigned hash(const Symbol& key)
+{
+   return key.hash();
+}
+
+VariableTable::VariableTable()
+: hashTable<Symbol,Expression>(hash)
+{
+}
+
+VariableTable::~VariableTable()
+{
+  clearAndDestroy();
+}
+
+unsigned int
+VariableTable::exists(const Symbol &name) const
+{
+  return contains(&name);
+}
+void
+VariableTable::enter(const Symbol &name, Expression *value)
+{
+  Expression *exp = findValue(&name);
+  if (exp)
+    {
+      Symbol *sym = remove(&name);
+      delete sym ;
+      delete exp ;
+    }
+  insertKeyAndValue(new Symbol(name), value);
+}
+
+const Expression &
+VariableTable::lookup(const Symbol &name) const
+{
+  return *findValue(&name);
+}
+
+ostream &
+VariableTable::print(ostream &o) const
+{
+  hashTableIterator<Symbol,Expression>
+    next(*(hashTable<Symbol,Expression>*)this); // cast to
+							   // non-const  
+
+  while (++next)
+    o << *next.key() << "\t" << *next.value() << endl;
+
+  return o << endl;
+}
+
+ostream &operator <<(ostream &o, const VariableTable &v)
+{
+  return v.print(o);
+}