phil@amd70.UUCP (Phil Ngai) (01/07/84)
And I was going to ask what's the difference between 0 and NULL.
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Phil Ngai (408) 988-7777 {ucbvax,decwrl,ihnp4,allegra,intelca}!amd70!philkvm@basservax.SUN (01/12/84)
I suggest that you don't spend a lot of time worrying about --More--. It has perhaps consumed more programmer effort than any other tiny "write-in-an-evening" program that I have ever seen. I have seen numerous versions with various combinations of "fixes", they all suffer from the initial bad design and implementation. Do yourself a favour and write yourself a scroller, even the humble BTL "p" will bring you less pain. I expect I should say something about null pointers too, you said: they'd checked some potentially null pointers before dereferencing them, but compared them to 0 instead of NULL, and... I admit that saying 0 rather than NULL is bad style, but like it or not, sport, 0 is NULL. These folk stories about NULL may never had begun if we had read our C Ref Mans. 7.7: "A pointer may be compared to an integer only if the integer is the constant 0. A pointer to which 0 has been assigned is guaranteed not to point to any object, and will appear to be equal to 0; in conventional usage, such a pointer is considered to be null."
jim@haring.UUCP (Jim McKie) (01/13/84)
Better still, put terminal paging into the tty driver, then you can throw more away (in more ways than one). You don't need much more than "cat" any more (with fewer, rather than more, options). Jim McKie Centrum voor Wiskunde en Informatica, Amsterdam ..mcvax!jim
berry@zehntel.UUCP (01/17/84)
#R:amd70:-422100:zinfandel:12400043:000:635 zinfandel!berry Jan 16 12:41:00 1984 "Better still, put terminal paging into the tty driver, then you can throw more away (in more ways than one). You don't need much more than "cat" any more (with fewer, rather than more, options)." --Jim McKie Centrum voor Wiskunde en Informatica, Amsterdam ..mcvax!jim /* ---------- */ I don't believe this! How is the tty driver supposed to find out how many lines your screen has? And how do you tell it when you want paging and when you don't? With an ioctl() or fcntl()? Then you need a program to do it. Ick. Might as well keep more. Berry Kercheval Zehntel Inc. (ihnp4!zehntel!zinfandel!berry) (415)932-6900