Re: What are the odds? (a continuation of One works ...)

From	Keith Thompson <kst-u@mib.org>
Newsgroups	comp.lang.c
Subject	Re: What are the odds? (a continuation of One works ...)
Date	2019-11-06 19:19 -0800
Organization	None to speak of
Message-ID	<ln36f05q6t.fsf@kst-u.example.com> (permalink)
References	(2 earlier) <fQBwF.59470$Ko9.7309@fx48.iad> <vvv5sehh7oil3eb5dft8dun7s4t1rbt4h7@4ax.com> <voGwF.93833$vD7.57507@fx06.iad> <g4g6se5u1ggsmecioggck2k7ve59pfdbbp@4ax.com> <2VHwF.97943$_i.39059@fx25.am4>

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Bart <bc@freeuk.com> writes:
> On 06/11/2019 22:23, Barry Schwarz wrote:
>> On Wed, 6 Nov 2019 15:52:28 -0500, DFS <nospam@dfs.com> wrote:
>>>     char charset[62] =
>>> "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
>> After numerous examples in your comp.lang.c posts (where I have
>> redirected this response since we are not discussing the odds any
>> more) of calculating charsetLen correctly, you have chosen to use a
>> different method.  You have tried to pass charset to strlen in
>> complete violation of the requirements that function imposes.
>> 
>> It is not sufficient to simply pass a pointer to char to strlen.
>> strlen requires that the pointer actually point to a string.  In order
>> for an array of char to contain a string, the array must contain at
>> least one '\0' to properly terminate the string.  charset does not.
>
> A simple fix is to get rid of the '62':
>
>   char charset[] =
>    "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

The only thing the code does that depends on charset containing a
valid string is the single (incorrect) call to strlen().  If you
replace `strlen(charset)` by `sizeof charset` then there's no need
to nul-terminate it.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for Philips Healthcare
void Void(void) { Void(); } /* The recursive call of the void */

Thread

Re: What are the odds? (a continuation of One works ...) Barry Schwarz <schwarzb@delq.com> - 2019-11-06 14:23 -0800
  Re: What are the odds? (a continuation of One works ...) Bart <bc@freeuk.com> - 2019-11-06 22:35 +0000
    Re: What are the odds? (a continuation of One works ...) luser droog <luser.droog@gmail.com> - 2019-11-06 17:09 -0800
    Re: What are the odds? (a continuation of One works ...) Keith Thompson <kst-u@mib.org> - 2019-11-06 19:19 -0800
      Re: What are the odds? (a continuation of One works ...) Ian Collins <ian-news@hotmail.com> - 2019-11-07 16:30 +1300
        Re: What are the odds? (a continuation of One works ...) Bart <bc@freeuk.com> - 2019-11-07 10:59 +0000
        Re: What are the odds? (a continuation of One works ...) David Brown <david.brown@hesbynett.no> - 2019-11-07 14:27 +0100
  Re: What are the odds? (a continuation of One works ...) DFS <nospam@dfs.com> - 2019-11-06 18:09 -0500
    Re: What are the odds? (a continuation of One works ...) Keith Thompson <kst-u@mib.org> - 2019-11-06 19:26 -0800
      Re: What are the odds? (a continuation of One works ...) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-11-07 11:57 +0000

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