Patch for isdigit/isalpha/etc. macro arguments

[Andreas Schwab]

DJ Delorie <dj@redhat.com> writes:

> Andreas Schwab <schwab@suse.de> writes:
>> How can it distinguish EOF from '\377'?
>
> EOF is -1 and '\377' is 255;

The value of '\377' is implementation-defined.  It is -1 when char is a
signed 8-bit type.

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
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