CTRL(X) in ANSI standard

[BALDWIN]

> > [use '\^X' instead of CTRL(x) or CTRL('x')]
> As has been said before, the right way to do this is:
> 	#define	BEL	'\007'

I was thinking mainly about programs that use curses or otherwise read
characters one at a time and do special things with ctrl chars.  E.g.,

	switch (c) {
	case '\^U':
		/* up code */
	case '\^D':
		/* down code */

Etc.  #define's (other than CTRL) just won't do.  And the #define for
CTRL moves around, so you have to use #ifndef.  Glick.

Also, it is easier to think in terms of ctrl chars rather than their
octal values when dealing with funny terminal sequences.  For instance,
the cursor motion sequence on mime's is ^T row col, and using
printf("\^T%c%c", row, col) is a bit more obvious than
printf("\024%c%c", row, col).
						Michael Baldwin
						AT&T Bell Labs
						harpo!whuxl!mike