--- stack/stack.c	2002/02/07 01:06:44	1.45
+++ stack/stack.c	2002/02/07 03:56:39	1.46
@@ -57,6 +57,7 @@
   stackitem *head;		/* Head of the stack */
   hashtbl symbols;		/* Hash table of all variable bindings */
   int err;			/* Error flag */
+  int non_eval_flag;
 } environment;
 
 /* A type for pointers to external functions */
@@ -66,9 +67,10 @@
 /* Initialize a newly created environment */
 void init_env(environment *env)
 {
-  long i;
+  int i;
 
-  env->err=0;
+  env->err= 0;
+  env->non_eval_flag= 0;
   for(i= 0; i<HASHTBLSIZE; i++)
     env->symbols[i]= NULL;
 }
@@ -76,8 +78,8 @@
 /* Returns a pointer to a pointer to an element in the hash table. */
 symbol **hash(hashtbl in_hashtbl, const char *in_string)
 {
-  long i= 0;
-  unsigned long out_hash= 0;
+  int i= 0;
+  unsigned int out_hash= 0;
   char key= '\0';
   symbol **position;
   
@@ -350,8 +352,6 @@
   nl();
 }
 
-
-
 /* Prints the stack. */
 extern void printstack(environment *env)
 {
@@ -367,13 +367,7 @@
 {
   stackitem *temp= env->head;
   
-  if((env->head)==NULL) {
-    printerr("Too Few Arguments");
-    env->err=1;
-    return;
-  }
-
-  if(env->head->next==NULL) {
+  if(env->head==NULL || env->head->next==NULL) {
     printerr("Too Few Arguments");
     env->err=1;
     return;
@@ -384,16 +378,6 @@
   env->head->next= temp;
 } 
 
-stackitem* copy(stackitem* in_item)
-{
-  stackitem *out_item= malloc(sizeof(stackitem));
-
-  memcpy(out_item, in_item, sizeof(stackitem));
-  out_item->next= NULL;
-
-  return out_item;
-}
-
 /* Recall a value from a symbol, if bound */
 extern void rcl(environment *env)
 {
@@ -422,6 +406,10 @@
   push_val(&(env->head), val); /* Return its bound value */
 }
 
+extern void pack(environment*);
+void stack_read(environment*, char*);
+
+
 /* If the top element is a symbol, determine if it's bound to a
    function value, and if it is, toss the symbol and execute the
    function. */
@@ -437,28 +425,27 @@
     return;
   }
 
-  /* if it's a symbol */
-  if(env->head->item->type==symb) {
-
+  switch(env->head->item->type) {
+    /* if it's a symbol */
+  case symb:
     rcl(env);			/* get its contents */
     if(env->err) return;
     if(env->head->item->type!=symb){ /* don't recurse symbols */
       eval(env);			/* evaluate the value */
       return;
     }
-  }
+    break;
 
-  /* If it's a lone function value, run it */
-  if(env->head->item->type==func) {
+    /* If it's a lone function value, run it */
+  case func:
     in_func= (funcp)(env->head->item->content.ptr);
     toss(env); 
     if(env->err) return;
     (*in_func)(env);
-    return;
-  }
+    break;
 
-  /* If it's a list */
-  if(env->head->item->type==list) {
+    /* If it's a list */
+  case list:
     temp_val= env->head->item;
     env->head->item->refcount++;
     toss(env);
@@ -471,10 +458,31 @@
 	toss(env);
 	if(env->err) return;
 	eval(env);
+	if(env->err) return;
       }
       iterator= iterator->next;
     }
     free_val(temp_val);
+    break;
+
+    /* If it's a string */
+  case string:
+    temp_val= env->head->item;
+    env->head->item->refcount++;
+    toss(env);
+    if(env->err) return;
+    push_sym(env, "[");
+    env->non_eval_flag++;
+    stack_read(env, (char*)temp_val->content.ptr);
+    env->non_eval_flag--;
+    push_sym(env, "["); pack(env);
+    if(env->err) return;
+    eval(env);
+    if(env->err) return;
+    free_val(temp_val);
+    break;
+
+  default:
   }
 }
 
@@ -555,7 +563,6 @@
   int itemp;
   size_t inlength= strlen(in_line)+1;
   int convert= 0;
-  static int non_eval_flag= 0;
 
   temp= malloc(inlength);
   rest= malloc(inlength);
@@ -591,7 +598,7 @@
     /* If single char */
     if((convert= sscanf(in_line, "%c%[^\n\r]", temp, rest))) {
       if(*temp==';') {
-	if(!non_eval_flag) {
+	if(!env->non_eval_flag) {
 	  eval(env);		/* Evaluate top element */
 	  break;
 	}
@@ -603,14 +610,14 @@
       if(*temp==']') {
 	push_sym(env, "[");
 	pack(env);
-	if(non_eval_flag!=0)
-	  non_eval_flag--;
+	if(env->non_eval_flag)
+	  env->non_eval_flag--;
 	break;
       }
 
       if(*temp=='[') {
 	push_sym(env, "[");
-	non_eval_flag++;
+	env->non_eval_flag++;
 	break;
       }
     }