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Date: Tue, 02 Jan 2024 19:59:57 -0800
To: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
Cc: cygwin AT cygwin DOT com
Subject: Re: Possibly buggy use of ctype.h macros.
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On 2024-01-02 16:11, Takashi Yano via Cygwin wrote:
> Perhaps, the off-by-one is for EOF as you guess.

I doubt it. If EOF were out of range of char, it would have to be -129 or less,
so that -127 would look even more wrong.

I see EOF is just -1. That value will also be produced by '\xFF', or "\xff"[0], etc.

This -127 displacement is worth looking into; there is a smell
emanating from it.


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