Nonvirtual member functions

• int do_execute(Command *) - executes the given command, echoing it to the log file if necessary and informing all the UIObjects. This will NOT delete the Command; this routine is called by other routines in CommandQueue.
• void delete_current(void) - deletes the command which is at the top of the queue, and moves all the other commands up. This is called by `execute' after the command has been run.
• int logging(void) - return TRUE if logging of commands is turned on.
• void log_on(char *) - turns on logging of commands, to the given file.
• void log_off(void) - turns off logging, closes the open log file if necessary.
• int num(void) - return number of commands in the queue.
• int append(Command *) - puts the given command instance at the end of the queue. This will not execute it; commands are not executed until one of the following three routines are called. This returns TRUE if the command could be added.
• int execute(UIList *UIL = NULL) - executes just the first command in the queue, by calling do_execute and then delete_command. If a particular UIList is given, that will be used, otherwise the internal one will be used. This will definitel delete the command when it is done. Returns the success code of the command, or FALSE if not command is available.
• void execute_all(UIList *UIL = NULL) - just calls execute until the queue is empty.
• int runcommand(Command *) - this routine executes the given command, but without adding it to the queue. It should be used when you definitely know that a command should be done immediately, and can be done out-of-order with respect to the other commands which might be in the queue. When the command is done, it is deleted. This returns the success code of the command.