COS_String
cos_read_string (unsigned char *str, size_t len, size_t start, size_t* endp);
+COS_Symbol
+cos_read_symbol (unsigned char *str, size_t len, size_t start, size_t* endp);
+
COS_Cons
cos_read_list (unsigned char *str, size_t len, size_t start, size_t* endp);