--- stack/stack.c	2002/01/08 14:17:33	1.8
+++ stack/stack.c	2002/01/09 05:01:24	1.13
@@ -128,10 +128,10 @@
   new_item->content.ptr= *hash(in_hash, in_string);
   new_item->type= ref;
 
-  if(handle==NULL)
-    handle= dlopen(NULL, RTLD_LAZY);
-
   if(new_item->content.ptr==NULL) {
+    if(handle==NULL)
+      handle= dlopen(NULL, RTLD_LAZY);    
+
     symbol= dlsym(handle, in_string);
     if(dlerror()==NULL) 
       def_func(in_hash, symbol, in_string);
@@ -165,7 +165,7 @@
   printf("\n");
 }
 
-void prin(stackitem** stack_head)
+void print_(stackitem** stack_head)
 {
   if((*stack_head)==NULL)
     return;
@@ -189,7 +189,7 @@
 
 extern void print(stackitem** stack_head)
 {
-  prin(stack_head);
+  print_(stack_head);
   toss(stack_head);
 }
 
@@ -200,7 +200,7 @@
     print_st(stack_head->next, counter+1);
 
   printf("%ld: ", counter);
-  prin(&stack_head);
+  print_(&stack_head);
   nl();
 }
 
@@ -242,7 +242,9 @@
     push_cstring(stack_head, temp);
   else if((convert= sscanf(in_line, "%d %[^\n\r]", &itemp, rest)) >= 1)
     push_val(stack_head, itemp);
-  else if((convert= sscanf(in_line, "%[^ ;\n\r]%[^\n\r]", temp, rest)) >= 1) 
+  else if((convert= sscanf(in_line, "\\%c%[^\n\r]", temp, rest)) >= 1) {
+    temp[1]= '\0'; push_ref(stack_head, in_hash, temp);
+  } else if((convert= sscanf(in_line, "%[^ ;\n\r]%[^\n\r]", temp, rest)) >= 1) 
     push_ref(stack_head, in_hash, temp);
   else if((convert= sscanf(in_line, "%c%[^\n\r]", temp, rest)) >= 1)
     if(*temp==';')
@@ -308,6 +310,70 @@
   *stack_head= new_head;
 }
 
+extern void swap(stackitem** stack_head)
+{
+  stackitem* temp= (*stack_head);
+  
+  if((*stack_head)==NULL || (*stack_head)->next==NULL)
+    return;
+
+  *stack_head= (*stack_head)->next;
+  temp->next= (*stack_head)->next;
+  (*stack_head)->next= temp;
+} 
+
+extern void eq(stackitem** stack_head)
+{
+  void *left, *right;
+  int result;
+
+  if((*stack_head)==NULL || (*stack_head)->next==NULL)
+    return;
+
+  left= (*stack_head)->content.ptr;
+  swap(stack_head);
+  right= (*stack_head)->content.ptr;
+  result= (left==right);
+  
+  toss(stack_head); toss(stack_head);
+  push_val(stack_head, (left==right));
+}
+
+extern void not(stackitem** stack_head)
+{
+  int value;
+
+  if((*stack_head)==NULL)
+    return;
+
+  value= (*stack_head)->content.val;
+  toss(stack_head);
+  push_val(stack_head, !value);
+}
+
+extern void neq(stackitem** stack_head)
+{
+  eq(stack_head);
+  not(stack_head);
+}
+
+extern void def(stackitem** stack_head)
+{
+  stackitem *temp, *value;
+
+  if(*stack_head==NULL || (*stack_head)->next==NULL 
+     || (*stack_head)->type!=ref)
+    return;
+
+  temp= (*stack_head)->content.ptr;
+  value= (*stack_head)->next;
+  temp->content= value->content;
+  value->content.ptr=NULL;
+  temp->type= value->type;
+
+  toss(stack_head); toss(stack_head);
+} 
+
 extern void quit()
 {
   exit(EXIT_SUCCESS);
@@ -328,8 +394,7 @@
     printf("okidok\n ");
   }
 
-
-  return EXIT_SUCCESS;
+  exit(EXIT_SUCCESS);
 }
 
 /* Local Variables: */