unsigned long ERR_get_error();
unsigned long ERR_get_error_line();
+unsigned long ERR_get_error_line_data();
unsigned long ERR_peek_error();
unsigned long ERR_peek_error_line();
+unsigned long ERR_peek_error_line_data();
void ERR_clear_error();
char *ERR_error_string();
char *ERR_lib_error_string();