Xref: utzoo comp.sys.ibm.pc:16898 comp.binaries.ibm.pc.d:509 comp.emacs:3749
Path: utzoo!attcan!uunet!husc6!bu-cs!madd
From: madd@bu-cs.BU.EDU (Jim Frost)
Newsgroups: comp.sys.ibm.pc,comp.binaries.ibm.pc.d,comp.emacs
Subject: Re: US PC programmers still live in a 7-bit world!
Message-ID: <23589@bu-cs.BU.EDU>
Date: 2 Jul 88 19:52:01 GMT
References: <1988Jun22.223158.1366@LTH.Se> <126@dcs.UUCP>
Reply-To: madd@bu-it.bu.edu (Jim Frost)
Followup-To: comp.sys.ibm.pc
Organization: Boston University Distributed Systems Group
Lines: 16

In article <126@dcs.UUCP> wnp@dcs.UUCP (Wolf N. Paul) writes:
|The C functions toupper()/tolower() rely on upper and lower case to be
|two parallel groups of consecutive codes within the ASCII scheme.

Keep in mind that the implementations of isupper() and islower() often
are table driven and do not make this assumption.  Also, toupper() and
tolower() are sometimes as simple as:

#define toupper(A) (A - ('a' - 'A'))

and other times are complex enough to check for upper/lowercaseness.
I'd just implement my own that handled the extra characters.  Who says
that you have to use the routines supplied with your compiler?

jim frost
madd@bu-it.bu.edu