andrew@cs.arizona.edu (Andrei V. Zaitsev) (03/28/91)
I have a question about ASCII code. Can I be sure that character with code 13 will return cursor to the beginning of the line independently of the terminal type ? I need this ability for my C program but I do not want to use curses package because it results in the huge size of the executable file.
barmar@think.com (Barry Margolin) (03/28/91)
In article <1270@caslon.cs.arizona.edu> andrew@cs.arizona.edu (Andrei V. Zaitsev) writes: >I have a question about ASCII code. Can I be sure that character >with code 13 will return cursor to the beginning of the line >independently of the terminal type ? If you're willing to assume that you're talking to an ASCII terminal you should be pretty safe. Then again, any ASCII system that supports non-ASCII terminals probably also has a tty driver that automatically converts from ASCII; however, if your program writes in raw mode this conversion would be bypassed. You're also probably safer using '\r' rather than '\015', since the former will work properly on a system that uses something other than ASCII internally. Some terminals can be configured to perform a line feed automatically after receiving carriage return. However, since most Unix software doesn't expect this, it's safe to assume that the terminal is not in this mode. -- Barry Margolin, Thinking Machines Corp. barmar@think.com {uunet,harvard}!think!barmar
gwyn@smoke.brl.mil (Doug Gwyn) (03/28/91)
In article <1270@caslon.cs.arizona.edu> andrew@cs.arizona.edu (Andrei V. Zaitsev) writes: >I have a question about ASCII code. Can I be sure that character >with code 13 will return cursor to the beginning of the line >independently of the terminal type ? >I need this ability for my C program but I do not want to use >curses package because it results in the huge size of the >executable file. If you're sure that USASCII is used, then the answer is "Yes, if ANYthing simple will return the cursor this is the one." In C, try using the escape sequence \r in character constants and string literals. That should port to non-ASCII environments also.