robert@nereid.jpl.nasa.gov (Robert Angelino) (05/03/91)
I'm writing some code that utilizes a primitive tty interface.
I would like to display non-printable characters on my
unix system. I know in DOS this can be done like so
printf("%c",175); (which happens to display a double >)
This will not work on my SPARC. I've found out (through tracing) that
the following clears the screen:
print("\33[H\33[2J"); (this also happens to work on VMS)
As you can see this is not what I would call intuitive. Has anyone out
there discovered how I can go about doing this using simple printf
statements??
thanks in advance
--
- ------ - Robert Angelino
| | | ---- \ | | ms T-1704L
| | | | \ | | | 4800 Oak Grove Drive
| | | | -- | | | Pasadena, CA 91109
---| | | | \__/ | |___ robert@triton.jpl.nasa.gov
\____|et |_|ropulsion |_____\aboratory (818) 354-9574gordon@osiris.cso.uiuc.edu (John Gordon) (05/03/91)
robert@nereid.jpl.nasa.gov (Robert Angelino) writes: >I'm writing some code that utilizes a primitive tty interface. >I would like to display non-printable characters on my >unix system. I know in DOS this can be done like so > printf("%c",175); (which happens to display a double >) This works in DOS because DOS has an "extended character set", that is, it has 256 defined characters instead of only 128. This is definitely *not* portable to other machines. --- John Gordon Internet: gordon@osiris.cso.uiuc.edu #include <disclaimer.h> gordon@cerl.cecer.army.mil #include <clever_saying.h>
ok@goanna.cs.rmit.oz.au (Richard A. O'Keefe) (05/09/91)
In article <6197@mahendo.Jpl.Nasa.Gov>, robert@nereid.jpl.nasa.gov (Robert Angelino) writes: > I'm writing some code that utilizes a primitive tty interface. > I would like to display non-printable characters on my > unix system. If they _are_ "non-printable" characters, what do expect them to display AS? If you are writing to a terminal, read your terminal manual. If you are writing to the console, read your Sun manuals. Tip: SunOS 4.something supports 8-bit characters, and comes with (at least some) fonts for the ISO 8859/1 character set. > I've found out (through tracing) that the following clears the screen: > print("\33[H\33[2J"); (this also happens to work on VMS) > As you can see this is not what I would call intuitive. What do you mean, it's not intuitive? You send the home-clear sequence to a terminal, what do you EXPECT it to do? What's more, this is documented at tedious length in The Fine Manuals. Start with "man 1 suntools" and take it from there. > Has anyone out there discovered how I can go about doing this using > simple printf statements?? But you haven't told us what you want to *DO*. If you do not want ESC to be recognised as part of a terminal control escape sequence, do you want it to be displayed as a house, a boat, a picture of Queen Victoria, or what? The IBM PC assignments of pictures to codes is _not_ generally available on other machines (I was enchanted to discover that the upper 128 characters on an Atari 520-ST included Hebrew letters). It is not an exaggeration to describe SunOS as "copiously" documented. There are several introductory manuals. Go read them. -- Bad things happen periodically, and they're going to happen to somebody. Why not you? -- John Allen Paulos.