PRASAD@cc.utah.edu (11/12/90)
Hi This is my first posting to this newsgroup I wanted to know the ANSI screen control escape sequences e.g clear screen position cursor etc thanks in advance Prasad
jpr@jpradley.uucp (Jean-Pierre Radley) (11/12/90)
In article <102019@cc.utah.edu> PRASAD@cc.utah.edu writes: > This is my first posting to this newsgroup >I wanted to know the ANSI screen control escape sequences >e.g >clear screen >position cursor >etc 1) This is comp.lang.c, and your question isn't about the C language, now, is it? 2) Your /etc/termcap file should answer your question. Jean-Pierre Radley HIGH-Q jpr@jpradley CIS: 72160,1341
chris@mimsy.umd.edu (Chris Torek) (11/12/90)
In article <102019@cc.utah.edu> PRASAD@cc.utah.edu writes: > This is my first posting to this newsgroup So? :-) >I wanted to know the ANSI screen control escape sequences >e.g >clear screen >position cursor >etc See ANSI standard X3.64 (I have no idea what the date suffix is). Note that it has no relation at all to X3.159-1989. In other words, the sequences recommeded by ANSI for screen control have absolutely nothing to do with `ANSI C'; in fact, you can use ANSI C on a system that does not have a screen. -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 405 2750) Domain: chris@cs.umd.edu Path: uunet!mimsy!chris
demoel@ruunsa.fys.ruu.nl (Ed de_Moel) (11/12/90)
In <102019@cc.utah.edu> PRASAD@cc.utah.edu writes: >Hi > This is my first posting to this newsgroup >I wanted to know the ANSI screen control escape sequences >e.g >clear screen >position cursor >etc >thanks in advance >Prasad The ANSI standard for device control (not just CRT's but any output device!) exists since 1979. It really amazes me that UNIX people, unlike the rest of the world keep using non-standard (and hence non-portable) code using termcaps libraries. (Sorry, this was really aimed at a different letter in this group). Your escape-sequences are: Position cursor: <esc> [ y-coordinate ; x-coordinate H Clear screen: <esc> [ J The coordinate system for a CRT is: - left upper corner is <esc>[1;1H - right lower corner is <esc>[24;80H Note that cursor positioning and erasing are separate operations, so if you want to clear the screen and put the cursor in the upper left corner: <esc>[H<esc>[J (Hey: 1;1 is obviously default). The above codes are for 7-bit transmission, but will also work for 8-bit transmission. If you are using 8-bit transmission, you may abbreviate <esc>[ to <csi>. Note: <esc> = ASCII code 27 (decimal) 7-bit introducer 1st char ; = 27 + 32 parameter-separator [ = 27 + 64 7-bit introducer 2nd char <csi> = 27 + 128 8-bit introducer only char The complete text of ANSI X3-64/1979 can be obtained through your national normalization institute, which is probably ANSI in New York. Success ! Ed.
gwyn@smoke.brl.mil (Doug Gwyn) (11/12/90)
In article <1746@ruunsa.fys.ruu.nl> demoel@ruunsa.fys.ruu.nl (Ed de_Moel) writes:
-The ANSI standard for device control (not just CRT's but any
-output device!) exists since 1979. It really amazes me
-that UNIX people, unlike the rest of the world keep using
-non-standard (and hence non-portable) code using termcaps
-libraries.
It amazes me that people really think that X3.64 has been universally
implemented on all display devices. The slightest understanding of
termcap would demonstrate otherwise.chris@mimsy.umd.edu (Chris Torek) (11/13/90)
In article <1746@ruunsa.fys.ruu.nl> demoel@ruunsa.fys.ruu.nl (Ed de_Moel) writes: >The ANSI standard for device control (not just CRT's but any >output device!) exists since 1979. It really amazes me >that UNIX people, unlike the rest of the world keep using >non-standard (and hence non-portable) code using termcaps libraries. Tell that to the manufacturers of about half the terminals in use at our University, none of whom saw fit to implement X3.64. If our software required ANSI terminals, it would not work. In addition, merely knowing that a terminal's software followed the recommendations in X3.64 is not enough to control it fully, because you have no idea: - whether the device implements underline, bold, italics, etc - how many rows and columns there are - whether the device is a CRT or a printer - if the device is a CRT, which editing modes it implements and so on. X3.64 is a good (if annoyingly complicated) start, but it is not The Answer. -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 405 2750) Domain: chris@cs.umd.edu Path: uunet!mimsy!chris
seanf@sco.COM (Sean Fagan) (11/16/90)
In article <1746@ruunsa.fys.ruu.nl> demoel@ruunsa.fys.ruu.nl (Ed de_Moel) writes: >The ANSI standard for device control (not just CRT's but any >output device!) exists since 1979. It really amazes me >that UNIX people, unlike the rest of the world keep using >non-standard (and hence non-portable) code using termcaps >libraries. Oh, really? Please tell me what the "portable" way to write an editor is? Remember that it needs to work on Unix, under, say, at least 100 different terminals, under MS-DOS, on an Amiga, under X, etc. -- -----------------+ Sean Eric Fagan | "*Never* knock on Death's door: ring the bell and seanf@sco.COM | run away! Death hates that!" uunet!sco!seanf | -- Dr. Mike Stratford (Matt Frewer, "Doctor, Doctor") (408) 458-1422 | Any opinions expressed are my own, not my employers'.