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Groups > comp.lang.c > #156973
| From | Tim Rentsch <tr.17687@z991.linuxsc.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: arranging items in a array with a sorted pointer-list |
| Date | 2020-12-06 05:34 -0800 |
| Organization | A noiseless patient Spider |
| Message-ID | <86blf7kqi8.fsf@linuxsc.com> (permalink) |
| References | (11 earlier) <9YsxH.30679$Zh7.26119@fx04.iad> <87blfdxjmf.fsf@bsb.me.uk> <rq750a$h6h$1@dont-email.me> <87h7p4w977.fsf@bsb.me.uk> <rq8eei$he8$1@dont-email.me> |
James Kuyper <jameskuyper@alumni.caltech.edu> writes:
> On 12/2/20 9:53 AM, Ben Bacarisse wrote:
>
>> James Kuyper <jameskuyper@alumni.caltech.edu> writes:
>
> ...
>
>>> I'm pretty tired right now, so maybe I'm missing something
>>> obvious. If written in C, how would bsearch() go about returning
>>> a void* when it's arguments are const void*, without casting away
>>> const somewhere?
In English, the possessive form of "it" is spelled "its", with no
apostrophe. The word "it's" is a contraction for "it is".
>> There are various ways, but as an old-timer,
>
> I definitely qualify as an old-time; I remember what C was like
> before prototypes were added to the language. They were an enormous
> improvement.
No one is suggesting otherwise.
>> I like
>>
>> void *remove_const(s) void *s; { return s; }
>>
>> and in bsearch
>>
>> return remove_const(ptr);
>
> I definitely don't like leaving out a function prototype,
> particularly when the only reason for doing so is to disable
> the type checking enabled by the prototype.
Here that isn't the only reason for not using a prototype, nor
even the most important reason. A key point of not using a
prototype is so the call will have defined behavior.
However, if someone is determined never to use functions whose
declarations lack prototypes, that restriction too can be
accommodated:
(file dequalify.h)
#ifndef HAVE_DEQUALIFY_dot_H
#define HAVE_DEQUALIFY_dot_H
extern void * dequalify( const volatile void * );
#endif/*HAVE_DEQUALIFY_dot_H*/
(file dequalify.c)
#include "dequalify.h"
#include <stdarg.h>
static inline void *
fixit( void *f( const volatile void * ), ... ){
va_list a; void *pv;
va_start( a, f ), pv = va_arg( a, void * ), va_end( a );
return pv;
}
void *
dequalify( const volatile void *x ){
return fixit( dequalify, x );
}
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arranging items in a array with a sorted pointer-list Bonita Montero <Bonita.Montero@gmail.com> - 2020-11-28 11:00 +0100
Re: arranging items in a array with a sorted pointer-list Melzzzzz <Melzzzzz@zzzzz.com> - 2020-11-28 10:49 +0000
Re: arranging items in a array with a sorted pointer-list Bonita Montero <Bonita.Montero@gmail.com> - 2020-11-28 12:12 +0100
Re: arranging items in a array with a sorted pointer-list Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-11-28 03:21 -0800
Re: arranging items in a array with a sorted pointer-list Richard Damon <Richard@Damon-Family.org> - 2020-11-28 08:32 -0500
Re: arranging items in a array with a sorted pointer-list Bonita Montero <Bonita.Montero@gmail.com> - 2020-11-28 14:49 +0100
Re: arranging items in a array with a sorted pointer-list scott@slp53.sl.home (Scott Lurndal) - 2020-11-28 16:08 +0000
Re: arranging items in a array with a sorted pointer-list Bonita Montero <Bonita.Montero@gmail.com> - 2020-11-28 17:16 +0100
Re: arranging items in a array with a sorted pointer-list Bart <bc@freeuk.com> - 2020-11-28 16:23 +0000
Re: arranging items in a array with a sorted pointer-list Bonita Montero <Bonita.Montero@gmail.com> - 2020-11-28 17:35 +0100
Re: arranging items in a array with a sorted pointer-list "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2020-11-28 17:34 +0100
Re: arranging items in a array with a sorted pointer-list Bonita Montero <Bonita.Montero@gmail.com> - 2020-11-28 17:38 +0100
Re: arranging items in a array with a sorted pointer-list Richard Damon <Richard@Damon-Family.org> - 2020-11-28 13:03 -0500
Re: arranging items in a array with a sorted pointer-list Tim Woodall <news001@woodall.me.uk> - 2020-11-28 23:40 +0000
Re: arranging items in a array with a sorted pointer-list Dolores Filandro <dolfiland8@gmail.com> - 2020-12-23 13:06 -0800
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-11-28 18:08 +0000
Re: arranging items in a array with a sorted pointer-list Bonita Montero <Bonita.Montero@gmail.com> - 2020-11-28 19:14 +0100
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-11-28 19:14 +0000
Re: arranging items in a array with a sorted pointer-list Tim Woodall <news001@woodall.me.uk> - 2020-11-28 18:13 +0000
Re: arranging items in a array with a sorted pointer-list Siri Cruise <chine.bleu@yahoo.com> - 2020-11-28 17:16 -0800
Re: arranging items in a array with a sorted pointer-list Juha Nieminen <nospam@thanks.invalid> - 2020-11-29 09:41 +0000
Re: arranging items in a array with a sorted pointer-list Siri Cruise <chine.bleu@yahoo.com> - 2020-11-29 02:16 -0800
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-11-29 18:32 +0000
Re: arranging items in a array with a sorted pointer-list Juha Nieminen <nospam@thanks.invalid> - 2020-11-30 09:01 +0000
Re: arranging items in a array with a sorted pointer-list Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-11-30 13:03 +0000
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-11-30 20:46 +0000
Re: arranging items in a array with a sorted pointer-list scott@slp53.sl.home (Scott Lurndal) - 2020-11-30 21:03 +0000
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-11-30 22:27 +0000
Re: arranging items in a array with a sorted pointer-list Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2020-11-30 18:14 -0700
Re: arranging items in a array with a sorted pointer-list James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-11-30 23:02 -0500
Re: arranging items in a array with a sorted pointer-list Dolores Filandro <dolfiland8@gmail.com> - 2020-11-30 20:12 -0800
Re: arranging items in a array with a sorted pointer-list scott@slp53.sl.home (Scott Lurndal) - 2020-12-01 15:04 +0000
Re: arranging items in a array with a sorted pointer-list Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-12-01 22:10 +0000
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-12-01 22:25 +0000
Re: arranging items in a array with a sorted pointer-list Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-12-01 23:43 +0000
Re: arranging items in a array with a sorted pointer-list James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-12-01 23:25 -0500
Re: arranging items in a array with a sorted pointer-list Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-12-02 14:53 +0000
Re: arranging items in a array with a sorted pointer-list Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-12-02 07:03 -0800
Re: arranging items in a array with a sorted pointer-list Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-12-02 23:48 +0000
Re: arranging items in a array with a sorted pointer-list James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-12-02 11:13 -0500
Re: arranging items in a array with a sorted pointer-list Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-12-06 05:34 -0800
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-12-02 16:25 +0000
Re: arranging items in a array with a sorted pointer-list Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-12-02 23:58 +0000
Re: arranging items in a array with a sorted pointer-list Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-12-03 21:16 -0800
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-12-01 07:33 +0000
Re: arranging items in a array with a sorted pointer-list Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-12-01 03:46 -0800
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-12-01 17:15 +0000
Re: arranging items in a array with a sorted pointer-list Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-12-04 00:17 -0800
Re: arranging items in a array with a sorted pointer-list Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2020-12-01 10:07 -0800
Re: arranging items in a array with a sorted pointer-list Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-12-13 11:06 -0800
Re: arranging items in a array with a sorted pointer-list Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-12-01 07:04 -0800
Re: arranging items in a array with a sorted pointer-list Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-12-01 04:09 -0800
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-11-29 18:28 +0000
Re: arranging items in a array with a sorted pointer-list dave_thompson_2@comcast.net - 2021-01-31 16:03 -0500
Re: arranging items in a array with a sorted pointer-list Richard Damon <Richard@Damon-Family.org> - 2020-11-29 14:01 -0500
Re: arranging items in a array with a sorted pointer-list Juha Nieminen <nospam@thanks.invalid> - 2020-11-30 09:05 +0000
Re: arranging items in a array with a sorted pointer-list Richard Damon <Richard@Damon-Family.org> - 2020-11-30 07:09 -0500
Re: arranging items in a array with a sorted pointer-list Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-11-30 13:06 +0000
Re: arranging items in a array with a sorted pointer-list Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-11-30 06:28 -0800
Re: arranging items in a array with a sorted pointer-list Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-11-30 15:50 +0000
Re: arranging items in a array with a sorted pointer-list James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-11-30 10:07 -0500
Re: arranging items in a array with a sorted pointer-list Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-11-30 15:26 +0000
Re: arranging items in a array with a sorted pointer-list James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-11-30 10:02 -0500
Re: arranging items in a array with a sorted pointer-list Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-11-29 12:32 +0000
Re: arranging items in a array with a sorted pointer-list Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-11-29 18:58 -0800
Re: arranging items in a array with a sorted pointer-list Bonita Montero <Bonita.Montero@gmail.com> - 2020-11-29 13:52 +0100
Re: arranging items in a array with a sorted pointer-list Dolores Filandro <dolfiland8@gmail.com> - 2020-12-23 13:56 -0800
Re: arranging items in a array with a sorted pointer-list Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-11-28 23:41 -0800
Re: arranging items in a array with a sorted pointer-list Bonita Montero <Bonita.Montero@gmail.com> - 2020-12-05 12:23 +0100
Re: arranging items in a array with a sorted pointer-list Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-12-06 16:27 -0800
Re: arranging items in a array with a sorted pointer-list David Brown <david.brown@hesbynett.no> - 2020-12-07 11:17 +0100
Re: arranging items in a array with a sorted pointer-list Kaz Kylheku <563-365-8930@kylheku.com> - 2020-11-29 18:34 +0000
Re: arranging items in a array with a sorted pointer-list Bonita Montero <Bonita.Montero@gmail.com> - 2020-11-29 21:23 +0100
Re: arranging items in a array with a sorted pointer-list Juha Nieminen <nospam@thanks.invalid> - 2020-11-30 09:10 +0000
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