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Re: cvs commit: src/include ctype.h src/lib/libc/gen isctype.c tolower.c toupper.c

From: "Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>
Date: Thu, 7 Jul 2005 10:24:51 +0200

Lately Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx> said:
>   Log:
>   It is not acceptable to index the array out of bounds if an illegal index
>   is passed to a ctype function or macro.  Undo the last commit.  Emplace an
>   explicit range check for the integer passed to the ctype macros and
>   functions rather then underflowing or overflowing the array.  Currently
>   return 0 if the integer is out of range (it might be more appropriate to
>   assert).

hm. this doesn't really add value to your testing case for passing signed
chars. now they all appear non-printable - and not like the integer
equivalent, as the naive programmer would expect. I would prefer the
openbsd way:
	if (c == EOF)
		return 0;
		return ((table+1)[(unsigned char)c)]);

this gives expected results for (common?) misuse and even saves us one


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