Embedded Eacape Sequences ?

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2 total messages Started by Stan Novinsky Fri, 19 Apr 1996 12:19

#5035

Author: Stan Novinsky
Date: Fri, 19 Apr 1996 12:19

32 lines
1398 bytes

I have a program that I wish to have some escape sequences
defined and used.  The escape sequences will work on a 
VT emulation terminal I am using.  

For instance, I want to place the cursor at the top left
corner of my terminal screen with ESC//'[01;01H'.
This works in FORTRAN by defining the 
 
   ESC = CHAR(27)
   TOPL = ESC//'[01;01H'

When a FORTRAN type statement is issued, the cursor moves to the 
top left portion of the screen.

Is it possible to do this in C and if so, how is the 
sequence defined and used ???

Thanks 
stan_novinsky@jhuapl.edu



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Re: Embedded Eacape Sequences ?

#5039

Author: Bill Spitzak
Date: Sat, 20 Apr 1996 16:39

34 lines
1451 bytes

Stan Novinsky <stan_novinsky@jhuapl.edu> writes:

>I have a program that I wish to have some escape sequences
>defined and used.  The escape sequences will work on a 
>VT emulation terminal I am using.  

>For instance, I want to place the cursor at the top left
>corner of my terminal screen with ESC//'[01;01H'.
>This works in FORTRAN by defining the 
> 
>   ESC = CHAR(27)
>   TOPL = ESC//'[01;01H'

You can put these characters in string constants and then print
them.  The main secret is that the ESC character is '\033' or
equivalently '\x1b' or char(27).

The closest equivalent to the above in Ansi C would be:

	#define ESC "\033"
	const char *topl = ESC"[01;01H";

Since this depends on the string constant appending which you
might not have, just doing:

	const char *topl = "\033[01;01H";

might be what you want.

You are likely to get a lot of messages saying "use curses" or
other things to that effect.  Just ignore them, that is obviously
not what you want.

Bill

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