1 files changed, 194 insertions, 0 deletions
diff --git a/lib/omega/include/basic/SimpleList.h b/lib/omega/include/basic/SimpleList.h
new file mode 100644
index 0000000..104390d
--- /dev/null
+++ b/lib/omega/include/basic/SimpleList.h
@@ -0,0 +1,194 @@
+#if ! defined _Simple_List_h
+#define _Simple_List_h 1
+
+/*
+ *  Linked lists with an interface like a bit of libg++'s SLSimple_List class
+ */
+
+#include <assert.h>
+#include <basic/Iterator.h>
+#include <basic/Collection.h>
+#include <basic/Link.h>
+
+namespace omega {
+  
+#define Simple_List Omega_Simple_List
+#define Simple_List_Iterator Omega_Simple_List_Iterator
+
+template<class T> class Simple_List_Iterator;
+
+// A TEMPORARY HACK - ERROR IF YOU TRY TO USE "INDEX" - FERD
+
+template<class T> class Simple_List : public Sequence<T> {
+public:
+  Simple_List(const Simple_List<T> &l)
+  { contents = l.contents ? new List_Element<T>(*l.contents) : 0; }
+  Simple_List() { contents = 0; }
+  virtual ~Simple_List() { delete contents; }
+
+  Iterator<T> *new_iterator();
+  const T &operator[](int) const;
+  T &operator[](int);
+
+    
+  int size() const;
+  int length() const { return size(); }
+  int empty() const { return size() == 0; }
+
+  T &front() const;
+
+// insertion/deletion on a list invalidates any iterators
+// that are on/after the element added/removed
+
+  T remove_front();	       
+
+  void prepend(const T &item);
+  void append(const T &item);
+
+  void del_front();
+  void clear();
+
+  void join(Simple_List<T> &consumed);
+
+  int index(const T &) const {
+		assert(0&&"ILLEGAL SimpleList operation\n");
+    return -1;
+  }
+
+private:
+  friend class Simple_List_Iterator<T>;
+  List_Element<T> **end()
+  {
+    List_Element<T> **e = &contents;
+    while (*e)
+      e = &((*e)->tail);
+    return e;
+  }
+
+  List_Element<T> *contents;
+};
+
+
+template<class T> class Simple_List_Iterator : public List_Element_Iterator<T> {
+public:
+  Simple_List_Iterator(Simple_List<T> &l);
+  Simple_List_Iterator(const Simple_List<T> &l);
+  Simple_List_Iterator();
+private:
+  List_Element<T> &element() { return *this->i; } ;
+  friend class Simple_List<T>;
+};
+
+} // namespace
+
+#define instantiate_Simple_List(T)	template class Simple_List<T>;  \
+  template class Simple_List_Iterator<T>;                           \
+  instantiate_Only_List_Element(T)                                  \
+  instantiate_Sequence(T)
+
+namespace omega {
+  
+template<class T> Simple_List_Iterator<T>::Simple_List_Iterator(Simple_List<T> &l) 
+: List_Element_Iterator<T>(l.contents) {}
+
+template<class T> Simple_List_Iterator<T>::Simple_List_Iterator(const Simple_List<T> &l) 
+: List_Element_Iterator<T>(l.contents) {}
+
+template<class T> Simple_List_Iterator<T>::Simple_List_Iterator()
+: List_Element_Iterator<T>(0) {}
+
+template<class T> Iterator<T> *Simple_List<T>::new_iterator()
+{
+    return new Simple_List_Iterator<T>(*this);
+}
+
+template<class T> const T &Simple_List<T>::operator[](int i) const
+{
+    Simple_List_Iterator<T> p(*this);
+
+    while(--i > 0 && p)
+	p++;
+
+    if (p)
+	return *p;
+    else
+	return *((T *)0);
+}
+
+template<class T>       T &Simple_List<T>::operator[](int i)
+{
+    Simple_List_Iterator<T> p(*this);
+
+    while(--i > 0 && p)
+	p++;
+
+    if (p)
+	return *p;
+    else
+	return *((T *)0);
+}
+
+
+template<class T> int Simple_List<T>::size() const
+    {
+    int i = 0;
+    List_Element<T> * p = contents;
+    while (p)
+	{
+	p = p->tail;
+	i++;
+	}
+    return i;
+    }
+
+template<class T> T &Simple_List<T>::front() const
+    {
+    return contents->head;
+    }
+
+template<class T> T Simple_List<T>::remove_front()
+    {
+    List_Element<T> *frunt = contents;
+    contents = contents->tail;
+    T fruntT = frunt->head;
+    frunt->tail = 0;
+    delete frunt;
+    return fruntT;
+    }
+
+template<class T> void Simple_List<T>::prepend(const T &item)
+    {
+    contents = new List_Element<T>(item, contents);
+    }
+
+
+template<class T> void Simple_List<T>::append(const T &item)
+    {
+    *(end()) = new List_Element<T>(item, 0);
+    }
+
+
+template<class T> void Simple_List<T>::del_front()
+    {
+    List_Element<T> *e = contents;
+    contents = contents->tail;
+    e->tail = 0;
+    delete e;
+    }
+
+
+template<class T> void Simple_List<T>::clear()
+    {
+    delete contents;
+    contents = 0;
+    }
+
+template<class T> void Simple_List<T>::join(Simple_List<T> &consumed)
+    {
+    List_Element<T> *e = consumed.contents;
+    consumed.contents = 0;
+    *(end()) = e;
+    }
+
+} // namespace
+#endif