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Groups > comp.lang.c > #154855
| From | Keith Thompson <Keith.S.Thompson+u@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Puzzling "array subscript has type ‘char’" warning. |
| Date | 2020-09-11 01:10 -0700 |
| Organization | None to speak of |
| Message-ID | <87h7s4hgyb.fsf@nosuchdomain.example.com> (permalink) |
| References | <e7Cdncm5EpqKbMfCnZ2dnUU7_83NnZ2d@giganews.com> <87lfhhge1m.fsf@nosuchdomain.example.com> <1eidnfKeDO6cjcbCnZ2dnUU7_8zNnZ2d@giganews.com> |
Robbie Hatley <see.my.signature@for.my.contact.info> writes:
> On 9/10/2020 8:58 PM, Keith Thompson wrote:
[...]
>> Cast the argument to unsigned char:
>>
>> isdigit((unsigned char)*Ptr2
>>
>> (Yes, it's annoying that you need to do thsis, and I consider it a
>> design flaw in the <ctype.h> functions, but there it is.)
>
> Fascinating. Yes, that's safer, because it forces the number to be
> in the [0,127] range. Thanks for the tip!
No, it forces it to be in the [0,255] range (assuming CHAR_BIT==8).
--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for Philips Healthcare
void Void(void) { Void(); } /* The recursive call of the void */
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Puzzling "array subscript has type ‘char’" warning. Robbie Hatley <see.my.signature@for.my.contact.info> - 2020-09-10 20:37 -0700
Re: Puzzling "array subscript has type ‘char’" warning. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2020-09-10 20:58 -0700
Re: Puzzling "array subscript has type ‘char’" warning. Robbie Hatley <see.my.signature@for.my.contact.info> - 2020-09-10 22:49 -0700
Re: Puzzling "array subscript has type ‘char’" warning. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2020-09-11 01:10 -0700
Re: Puzzling "array subscript has type ‘char’" warning. gazelle@shell.xmission.com (Kenny McCormack) - 2020-09-11 13:09 +0000
Re: Puzzling "array subscript has type ‘char’" warning. Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-09-11 06:14 -0700
Re: Puzzling "array subscript has type ‘char’" warning. Richard Damon <Richard@Damon-Family.org> - 2020-09-11 08:09 -0400
Re: Puzzling "array subscript has type ‘char’" warning. James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-09-11 09:01 -0400
Re: Puzzling "array subscript has type ‘char’" warning. Kaz Kylheku <793-849-0957@kylheku.com> - 2020-09-11 16:16 +0000
Re: Puzzling "array subscript has type char" warning. dave_thompson_2@comcast.net - 2020-10-11 16:12 -0400
Re: Puzzling "array subscript has type char" warning. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2020-10-11 17:28 -0700
Re: Puzzling "array subscript has type char" warning. dave_thompson_2@comcast.net - 2020-11-01 23:07 -0500
Re: Puzzling "array subscript has type ‘char’" warning. jenniferjeson35@gmail.com - 2020-11-06 20:35 -0800
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