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Groups > comp.lang.c++ > #86579
| From | Bonita Montero <Bonita.Montero@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: How do C -programmers do reliable string handling? |
| Date | 2022-09-25 13:34 +0200 |
| Organization | A noiseless patient Spider |
| Message-ID | <tgpec8$3aijb$1@dont-email.me> (permalink) |
| References | <tgnedd$31bvi$1@dont-email.me> <tgnlqr$321io$1@dont-email.me> <tgntt1$32mqf$2@dont-email.me> <tgp4oh$skl$1@gioia.aioe.org> |
Am 25.09.2022 um 10:50 schrieb Muttley@dastardlyhq.com:
> On Sun, 25 Sep 2022 00:47:13 +0300
> JiiPee <kerrttuPoistaTama11@gmail.com> wrote:
>> On 24/09/2022 22:29, Gawr Gura wrote:
>>> but they don't provide any real
>>> guarantee against outside manipulation.
>>
>>
>> If someone really wants to
>>> modify your object they can always convert it to a char array and fiddle
>>> with it.
>>
>> Sure, although in my 30 years C++ I don't remember ever facing this
>> problem. It is quite difficult to accidentally do this.
>
> Many years ago faced with needing to access a private variable in a class
> that didn't have a getter method written by a team that refused to provide one
> for reasons I never understood, so I simply took the address of the first
> public variable following it, counted back and derefrenced the pointer. Very
> dodgy but it worked (until they changed the class layout obv).
>
> eg:
>
> #include <stdio.h>
>
> class myclass
> {
> int i;
> public:
> int j;
> myclass(): i(123) { }
> };
>
>
> int main()
> {
> myclass mc;
> int *p = &mc.j;
> --p;
> printf("%d\n",*p);
> return 0;
> }
Why not (&mc.j)[-1] ?
>
>
>
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How do C -programmers do reliable string handling? JiiPee <kerrttuPoistaTama11@gmail.com> - 2022-09-24 20:22 +0300
Re: How do C -programmers do reliable string handling? Bo Persson <bo@bo-persson.se> - 2022-09-24 21:00 +0200
Re: How do C -programmers do reliable string handling? Gawr Gura <gawrgura@mail.hololive.com> - 2022-09-24 12:29 -0700
Re: How do C -programmers do reliable string handling? JiiPee <kerrttuPoistaTama11@gmail.com> - 2022-09-25 00:47 +0300
Re: How do C -programmers do reliable string handling? Muttley@dastardlyhq.com - 2022-09-25 08:50 +0000
Re: How do C -programmers do reliable string handling? JiiPee <kerrttuPoistaTama11@gmail.com> - 2022-09-25 13:37 +0300
Re: How do C -programmers do reliable string handling? JiiPee <kerrttuPoistaTama11@gmail.com> - 2022-09-25 13:38 +0300
Re: How do C -programmers do reliable string handling? Bonita Montero <Bonita.Montero@gmail.com> - 2022-09-25 13:34 +0200
Re: How do C -programmers do reliable string handling? Bonita Montero <Bonita.Montero@gmail.com> - 2022-09-25 17:00 +0200
Re: How do C -programmers do reliable string handling? Muttley@dastardlyhq.com - 2022-09-25 15:14 +0000
Re: How do C -programmers do reliable string handling? Gawr Gura <gawrgura@mail.hololive.com> - 2022-09-25 09:22 -0700
Re: How do C -programmers do reliable string handling? JiiPee <kerrttuPoistaTama11@gmail.com> - 2022-09-26 01:01 +0300
Re: How do C -programmers do reliable string handling? Richard Damon <Richard@Damon-Family.org> - 2022-09-25 19:02 -0400
Re: How do C -programmers do reliable string handling? JiiPee <kerrttuPoistaTama11@gmail.com> - 2022-09-26 07:27 +0300
Re: How do C -programmers do reliable string handling? Muttley@dastardlyhq.com - 2022-09-26 15:19 +0000
Re: How do C -programmers do reliable string handling? JiiPee <kerrttuPoistaTama11@gmail.com> - 2022-09-26 21:53 +0300
Re: How do C -programmers do reliable string handling? Richard Damon <Richard@Damon-Family.org> - 2022-09-26 20:42 -0400
Re: How do C -programmers do reliable string handling? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-09-26 17:54 -0700
Re: How do C -programmers do reliable string handling? Muttley@dastardlyhq.com - 2022-09-27 09:36 +0000
Re: How do C -programmers do reliable string handling? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-27 15:28 +0100
Re: How do C -programmers do reliable string handling? Gawr Gura <gawrgura@mail.hololive.com> - 2022-09-25 16:34 -0700
Re: How do C -programmers do reliable string handling? JiiPee <kerrttuPoistaTama11@gmail.com> - 2022-09-26 07:32 +0300
Re: How do C -programmers do reliable string handling? Juha Nieminen <nospam@thanks.invalid> - 2022-09-26 08:33 +0000
Re: How do C -programmers do reliable string handling? Paavo Helde <eesnimi@osa.pri.ee> - 2022-09-26 12:18 +0300
Re: How do C -programmers do reliable string handling? Juha Nieminen <nospam@thanks.invalid> - 2022-09-26 09:47 +0000
Re: How do C -programmers do reliable string handling? Gawr Gura <gawrgura@mail.hololive.com> - 2022-09-26 07:40 -0700
Re: How do C -programmers do reliable string handling? Paavo Helde <eesnimi@osa.pri.ee> - 2022-09-24 23:04 +0300
Re: How do C -programmers do reliable string handling? JiiPee <kerrttuPoistaTama11@gmail.com> - 2022-09-25 00:44 +0300
Re: How do C -programmers do reliable string handling? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-09-26 02:03 -0700
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