--- a/lwasm/lwasm.c	Sat Mar 27 19:04:03 2010 -0600
+++ b/lwasm/lwasm.c	Sat Mar 27 20:16:24 2010 -0600
@@ -431,3 +431,76 @@
 	
 	return e;
 }
+
+void lwasm_save_expr(line_t *cl, int id, lw_expr_t expr)
+{
+	struct line_expr_s *e;
+	
+	for (e = cl -> exprs; e; e = e -> next)
+	{
+		if (e -> id == id)
+		{
+			lw_expr_destroy(e -> expr);
+			e -> expr = expr;
+			return;
+		}
+	}
+	
+	e = lw_alloc(sizeof(struct line_expr_s));
+	e -> expr = expr;
+	e -> id = id;
+	e -> next = cl -> exprs;
+	cl -> exprs = e;
+}
+
+lw_expr_t lwasm_fetch_expr(line_t *cl, int id)
+{
+	struct line_expr_s *e;
+	
+	for (e = cl -> exprs; e; e = e -> next)
+	{
+		if (e -> id == id)
+		{
+			return e -> expr;
+		}
+	}
+	return NULL;
+}
+
+void skip_operand(char **p)
+{
+	for (; **p && !isspace(**p); (*p)++)
+		/* do nothing */ ;
+}
+
+int lwasm_emitexpr(line_t *l, lw_expr_t expr, int size)
+{
+	int v;
+	
+	if (lw_expr_istype(expr, lw_expr_type_int))
+	{
+		v = lw_expr_intval(expr);
+	}
+	else
+	{
+		lwasm_register_error(l -> as, l, "Expression not fully resolved");
+		return -1;
+	}
+	
+	switch (size)
+	{
+	case 4:
+		lwasm_emit(l, v >> 24);
+		lwasm_emit(l, v >> 16);
+		/* fallthrough intended */
+			
+	case 2:
+		lwasm_emit(l, v >> 8);
+		/* fallthrough intended */
+		
+	case 1:
+		lwasm_emit(l, v);
+	}
+	
+	return 0;
+}