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From: HBO043%DJUKFA11.BITNET@cunyvm.cuny.edu (Christoph van Wuellen)
Newsgroups: comp.os.minix
Subject: Re: Where is isascii(c)?
Message-ID: <9853@nigel.udel.EDU>
Date: 1 Feb 90 20:49:05 GMT
Sender: usenet@udel.EDU
Lines: 7

<ctype.h> indeed is very messy. There is much code around which, e.g.,
does tolower(x) without checking in advance if x is an upper case letter.
This is wrong on the machines I work on since the tolower macro just adds
'a'-'A'. I don't know if some versions of tolower do the check, but this
has lead to errors in the past.

Christoph van Wuellen.