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Re: some unusual errors
- To: Benjamin Riefenstahl <benny at crocodial dot de>
- Subject: Re: some unusual errors
- From: Michael Richardson <mcr at solidum dot com>
- Date: Mon, 21 Sep 1998 12:55:22 -0300
- cc: gnu-win32 at cygnus dot com
>>>>> "Benjamin" == Benjamin Riefenstahl <benny@crocodial.de> writes:
Benjamin> a) Specification: The <ctype.h> functions all take "int"s in the range 0
Benjamin> to UCHAR_MAX plus EOF. This is the same range that getc() returns. It is
Benjamin> *not* the same range as "char", but OTOH "unsigned char" is a subset of
Benjamin> this range, so with regular strings one usually should cast like this
Benjamin> for(s = s00; isspace((unsigned char)*s); s++)
Benjamin> b) The <ctype.h> functions are usually implemented as macros which look
Benjamin> up the answers in a static array. I think what the compiler complains
Benjamin> about is, that you use a (signed) "char" to index into an array
Then the routines should cast the argument appropriately, or the routines
should be functions and cast things appropriate, or "char" should be by
default unsigned.
:!mcr!: | Solidum Systems Corporation, http://www.solidum.com
Michael Richardson |For a better connected world,where data flows faster<tm>
Personal: <A HREF="http://www.sandelman.ottawa.on.ca/People/Michael_Richardson/Bio.html">mcr@sandelman.ottawa.on.ca</A>. PGP key available.
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