--- stack/stack.c	2002/02/06 00:52:31	1.36
+++ stack/stack.c	2002/02/07 01:06:44	1.45
@@ -218,6 +218,7 @@
     switch (val->type){		/* and free the contents if necessary */
     case string:
       free(val->content.ptr);
+      break;
     case list:			/* lists needs to be freed recursively */
       item=val->content.ptr;
       while(item != NULL) {	/* for all stack items */
@@ -256,6 +257,39 @@
   printf("\n");
 }
 
+/* Gets the type of a value */
+extern void type(environment *env){
+  int typenum;
+
+  if((env->head)==NULL) {
+    printerr("Too Few Arguments");
+    env->err=1;
+    return;
+  }
+  typenum=env->head->item->type;
+  toss(env);
+  switch(typenum){
+  case integer:
+    push_sym(env, "integer");
+    break;
+  case string:
+    push_sym(env, "string");
+    break;
+  case symb:
+    push_sym(env, "symbol");
+    break;
+  case func:
+    push_sym(env, "function");
+    break;
+  case list:
+    push_sym(env, "list");
+    break;
+  default:
+    push_sym(env, "unknown");
+    break;
+  }
+}    
+
 /* Prints the top element of the stack. */
 void print_h(stackitem *stack_head)
 {
@@ -267,16 +301,24 @@
     printf("\"%s\"", (char*)stack_head->item->content.ptr);
     break;
   case symb:
-    printf("'%s'", ((symbol *)(stack_head->item->content.ptr))->id);
+    printf("%s", ((symbol *)(stack_head->item->content.ptr))->id);
     break;
   case func:
     printf("#<function %p>", (funcp)(stack_head->item->content.ptr));
     break;
   case list:
-    printf("#<list %p>", (funcp)(stack_head->item->content.ptr));
+    /* A list is just a stack, so make stack_head point to it */
+    stack_head=(stackitem *)(stack_head->item->content.ptr);
+    printf("[ ");
+    while(stack_head != NULL) {
+      print_h(stack_head);
+      printf(" ");
+      stack_head=stack_head->next;
+    }
+    printf("]");
     break;
   default:
-    printf("#<unknown %p>", (funcp)(stack_head->item->content.ptr));
+    printf("#<unknown %p>", (stack_head->item->content.ptr));
     break;
   }
 }
@@ -314,8 +356,6 @@
 extern void printstack(environment *env)
 {
   if(env->head == NULL) {
-    printerr("Too Few Arguments");
-    env->err=1;
     return;
   }
   print_st(env->head, 1);
@@ -388,6 +428,9 @@
 extern void eval(environment *env)
 {
   funcp in_func;
+  value* temp_val;
+  stackitem* iterator;
+
   if(env->head==NULL) {
     printerr("Too Few Arguments");
     env->err=1;
@@ -411,7 +454,55 @@
     toss(env); 
     if(env->err) return;
     (*in_func)(env);
+    return;
+  }
+
+  /* If it's a list */
+  if(env->head->item->type==list) {
+    temp_val= env->head->item;
+    env->head->item->refcount++;
+    toss(env);
+    if(env->err) return;
+    iterator= (stackitem*)temp_val->content.ptr;
+    while(iterator!=NULL && iterator->item!=NULL) {
+      push_val(&(env->head), iterator->item);
+      if(env->head->item->type==symb
+	&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) {
+	toss(env);
+	if(env->err) return;
+	eval(env);
+      }
+      iterator= iterator->next;
+    }
+    free_val(temp_val);
+  }
+}
+
+/* Reverse (flip) a list */
+extern void rev(environment *env){
+  stackitem *old_head, *new_head, *item;
+
+  if((env->head)==NULL) {
+    printerr("Too Few Arguments");
+    env->err=1;
+    return;
+  }
+
+  if(env->head->item->type!=list) {
+    printerr("Bad Argument Type");
+    env->err=2;
+    return;
+  }
+
+  old_head=(stackitem *)(env->head->item->content.ptr);
+  new_head=NULL;
+  while(old_head != NULL){
+    item=old_head;
+    old_head=old_head->next;
+    item->next=new_head;
+    new_head=item;
   }
+  env->head->item->content.ptr=new_head;
 }
 
 /* Make a list. */
@@ -454,10 +545,11 @@
   temp->item= pack;
 
   push(&(env->head), temp);
+  rev(env);
 }
 
 /* Parse input. */
-int stack_read(environment *env, char *in_line) 
+void stack_read(environment *env, char *in_line) 
 {
   char *temp, *rest;
   int itemp;
@@ -469,6 +561,12 @@
   rest= malloc(inlength);
 
   do {
+    /* If comment */
+    if((convert= sscanf(in_line, "#%[^\n\r]", rest))) {
+      free(temp); free(rest);
+      return;
+    }
+
     /* If string */
     if((convert= sscanf(in_line, "\"%[^\"\n\r]\" %[^\n\r]", temp, rest))) {
       push_cstring(&(env->head), temp);
@@ -518,18 +616,16 @@
     }
   } while(0);
 
-
   free(temp);
 
   if(convert<2) {
     free(rest);
-    return 0;
+    return;
   }
    
   stack_read(env, rest);
   
   free(rest);
-  return 1;
 }
 
 /* Relocate elements of the list on the stack. */
@@ -549,6 +645,11 @@
     return;
   }
 
+  rev(env);
+
+  if(env->err)
+    return;
+
   /* The first list element is the new stack head */
   new_head= temp= env->head->item->content.ptr;
 
@@ -731,6 +832,6 @@
     }
     printf("okidok\n ");
   }
-
-  exit(EXIT_SUCCESS);
+  quit(&myenv);
+  return EXIT_FAILURE;
 }