--- ray/src/hd/sm_list.c	1998/08/19 17:45:24	3.1
+++ ray/src/hd/sm_list.c	1999/06/10 15:22:23	3.7
@@ -20,12 +20,11 @@ static LIST *free_lists = NULL;
 extern int Malloc_cnt;   
 #endif
 LIST
+/* NOTE: Memory is not initialized */
 *new_list()
 {
     LIST *l;
 
-
-
     /* check free list for available edges */
     if( free_lists )
     {
@@ -38,9 +37,6 @@ LIST
       if( !(l = (LIST *)malloc(sizeof(LIST))))
 	  error(SYSTEM,"new_list():Unable to allocate memory");
     }
-    /* clear the memory */
-    bzero(l, sizeof(LIST));
-
     return(l);
 }
 
@@ -52,9 +48,6 @@ LIST *a,*b;
 {
     LIST * l;
 
-    if(!a)
-      return(b);
-
     if(!b)
        return(a);
     
@@ -67,6 +60,40 @@ LIST *a,*b;
     return(b);
 }
 
+/* attaches list a at the end of list b */
+LIST
+*add_data(l,d,end)
+LIST *l;
+int d;
+LIST **end;
+
+{
+    LIST *list,*lptr;
+
+    list = new_list();
+    SET_LIST_DATA(list,d);
+    SET_LIST_NEXT(list,NULL);
+    if(!l)
+    {
+      if(end)
+	*end = list;
+      return(list);
+    }
+    if(end)
+      lptr = *end;
+    else
+    {
+      lptr = l;
+      while(LIST_NEXT(lptr))
+	lptr = LIST_NEXT(lptr);
+    }
+    LIST_NEXT(lptr) = list;
+    if(end)
+      *end = list;
+
+    return(l);
+}
+
 /* Adds data to the end of a circular list. If set, "end"
  * is a pointer to the last element in the list
  */
@@ -95,22 +122,8 @@ int d;
     return(l);
 }
 
-/* Pushes data element d at the top of the list- returns pointer
-   to new top of list
- */
-LIST
-*push_data(l,d)
-LIST *l;
-int d;
-{
-    LIST * list;
-    
-    list = new_list();
-    SET_LIST_DATA(list,d);
-    SET_LIST_NEXT(list,l);
-    return(list);
-}
 
+
 /* frees the list */
 LIST
 *free_list(l)
@@ -118,11 +131,27 @@ LIST * l;
 {
     if(!l)
        return(NULL);
+
     free_lists = append_list(free_lists,l);
 
     return(NULL);
 }
 
+/* Pushes data element d at the top of the list- returns pointer
+   to new top of list
+ */
+LIST
+*push_data(l,d)
+LIST *l;
+int d;
+{
+  LIST *list;
+
+  list = new_list();
+  SET_LIST_DATA(list,d);
+  SET_LIST_NEXT(list,l);
+  return(list);
+}
 /* Returns data element d at the top of the list- returns pointer
    to new top of list
  */
@@ -131,7 +160,7 @@ pop_list(l)
 LIST **l;
 {
     LIST *p;
-    void *d;
+    int d;
     
     if(!l)
        return(NULL);
@@ -179,6 +208,10 @@ LIST **list;
     }
     return(FALSE);
 }
+
+
+
+